JP3390421B2 - Safety belt device for working at height - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety belt device for work at high places, which is worn by workers who perform work at high places for safety.

[0002]

2. Description of the Related Art Conventionally, the Labor Standards Law requires that a safety belt be worn in order to ensure the safety of workers who work in high places. Regarding the safety belt, for example, in Utility Model Registration No. 3051851, a pressure sensor turns on an alarm device when an operator wears a safety belt for working at high places, and thereby an alarm prompting the use of a lifeline is issued. A device adapted to emit is disclosed. In addition, JP-A-11-2672
Japanese Laid-Open Patent Publication No. 37-37 discloses a device which issues a warning when the hook of a lifeline is not hooked on the mainline.

[0003]

However, in the above-mentioned prior art, when the safety belt is not worn or the hook of the lifeline is not hooked on the main rope or the like, it is determined whether or not the worker is at a high place. However, since the warning is issued regardless of the fact that the operator is in a low place, there remains a problem that it is received as an annoying and disturbing warning. For this reason, there is a problem that the operator makes a work so that the warning sound itself is not emitted in order to avoid frequent troublesome warnings and the like even though the operator is not at a high place.
And, as a result, there was a problem that the high altitude accident would not end.

Therefore, the present invention solves the above-mentioned conventional drawbacks,
Eliminate warnings that diminish the effect, even when it is not actually dangerous, and only when the worker wearing a safety belt (body belt) is at a high place and it is really dangerous,
It is an object of the present invention to provide a safety belt device for work in high places, which can reliably and seriously warn that a lifeline hook has not been hooked.

[0005]

SUMMARY OF THE INVENTION A safety belt device for working in high places according to the present invention, which solves the above-mentioned problems, comprises a body belt which is detachably attached to an operator and a body belt which is attached to the body belt and can be extended. A safety belt device for aerial work, comprising at least a lifeline and a hook attached to the lifeline, wherein the hook is hooked on a master line or the like to ensure safety in aerial work. A state in which the height sensor detects the height position of the belt, and the hook is hooked while the height sensor detects a certain reference height or more in a state in which the worker wears the torso belt. The first feature is that a warning means is provided so as to issue a warning when it is not present. In addition to the first characteristic, the safety belt device for high-altitude work of the present invention has a warning means,
A second feature is that a warning is issued even when the height sensor indicates a certain minimum distance or less. In addition to the first or second characteristic, the safety belt device for high-altitude work according to the present invention is such that the warning means has a constant lifeline when the height sensor detects a predetermined reference height or higher. A third feature is that a warning is issued regardless of whether or not the hook is hooked when the length is not more than the length of feeding. Further, in the safety belt device for high places work of the present invention, in addition to any one of the features of the first to third aspects, the warning means includes an oblique high distance sensor for detecting an obliquely downward distance in addition to the height sensor. , Even if the height sensor does not detect a certain reference height or more, even if the above-mentioned oblique height distance sensor detects a certain reference oblique height distance or more, if the hook is not hooked The fourth feature is that the warning is issued. In addition to the features of any one of the above first to fourth features, the safety belt device for high-altitude work of the present invention has a wearing switch for turning on the power when the worker is wearing the torso belt. The fifth characteristic is to have.

[0006]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view showing a state in which an operator wears a safety belt device for work at high places according to an embodiment of the present invention, and FIG. 2 is a front view of a safety belt device for work at high places according to the embodiment of the present invention. FIG. 3 is a bottom view of a safety belt device for high-place work according to the embodiment of the present invention, FIG. 4 is a sectional view of a storage case, FIG. 5 is a block diagram of alarm means, and FIG. 6 is a front view of a hook. FIG. 7 is a cross-sectional view of a main part of the hook, FIGS. 8 and 9 are diagrams for explaining the operation of the device according to the embodiment, respectively, and FIG. 10 is a flow chart, for explaining the control operation of the alarm means of the device according to the embodiment. 11 and 12 are diagrams for explaining other embodiments of the present invention.

First, referring to FIGS. 1 to 3, a safety belt device for working at high places according to the present invention includes a body belt 1 worn by an operator.
It has 0. A lifeline 20 is attached to the trunk belt 10, and a hook 30 is attached to the tip of the lifeline 20. Further, the body belt 10 has a buckle 11
Is provided so that the worker can detachably attach the torso belt 10 to the waist and adjust the tightening degree.

The lifeline 20 is formed of a sufficiently strong flat string such as a strap, or a rope or other string, and is attached to the body belt 10 in a storage case 40.
It is configured so that it can be fed out and wound up freely. The storage case 40 is provided with a winding means 21 described later for winding the lifeline 20. Further, a shock absorber 22 for suddenly feeding the lifeline 20 is attached to the body belt 10.
The hook 30 is a means for hooking a rope called a master rope P, a metal pipe, a metal rod or the like in order to prevent an operator from falling from a high place. When not in use, the hook 30 can be stored in a bag 50 attached to the trunk belt 10, a metal fitting, or the like.

Referring to FIG. 4, a winding means 21 for the lifeline 20 is installed in the storage case 40, and a warning means 60 is provided. The winding means 21 and the warning means 60 do not necessarily have to be provided in the same storage case 40, but can be provided in different cases. The winding means 21 allows the worker to manually reel out the lifeline 20 when needed, while the winding means 21 releases the stopper (not shown) at the time of winding, thereby storing the storage case 4.
It is configured to be automatically wound within 0.

Referring also to FIG. 5, the warning means 60 includes a power source 61, a wearing switch 62, a control section 63, and a height sensor 6.
4, at least a hook sensor 65 and a speaker 66. The power source 61 is for supplying electric power to each part of the warning means 60, and may be, for example, a dry battery or a rechargeable battery. As for the power supply 61, a battery check display section showing the power consumption state may be provided. The wearing switch 62 of the alarm means 60 is a switch that allows the power supply from the power source 61 to each part of the warning means 60. When the worker wears the trunk belt 10, the switch is turned on and the trunk belt 10 is removed. The switch turns off. As shown in FIG. 4, the wearing switch 62 is used for the body belt 10
When the worker wears the trunk belt 10, the wearing switch 62 causes the trunk belt 1 to move.
The switch can be turned on by setting the state of being pushed by the body of the operator through 0. Of course, the wearing switch 62 may be arranged on the buckle 11 of the torso belt 10 so that the switch is turned on by inserting the end of the torso belt 10 into the buckle 11. The wearing switch 62 need only have a configuration in which the trunk belt 10 is switched on when it is worn by the operator, and its specific configuration may be variously configured by using a well-known proximity switch or other switches. You can

The control unit 63 of the warning means 60 is composed of a microcomputer having software built therein, inputs information from the height sensor 64 and hook sensor 65, and performs arithmetic processing according to a built-in control program. Speaker 66
Is instructed to generate a predetermined warning voice or warning sound. The height sensor 64 of the warning means 60 is a power source 61.
Is a sensor that detects the height of the body belt 10 worn by the worker when the switch is on. By detecting the height of the torso belt 10, the height from the ground or floor of the operator is detected. The height sensor 64 is composed of, for example, a distance sensor using sound waves such as ultrasonic waves, light such as laser light, radio waves, and other electromagnetic waves, and the height sensor 64 of the height sensor 64 when the trunk belt 10 is worn by an operator. The transmitter 64a is attached so that it faces downward. That is, for example, in FIG.
As shown in, the height sensor 64 is provided in the storage case 40, and the detection transmitted wave (sound wave, light, radio wave, etc.) is detected.
Source 64a faces downward through a lower wall 41, a part of which is transparent, or faces downward through an opening provided in the lower wall 41, or projects downward from the lower wall 41 of the storage case 40. To deploy. In this way, the height sensor 64
By arranging so that the transmission source 64a faces downward, it is possible to detect the height of the place where the worker is from the ground or floor. The detected height data is the control unit 6
Sent to 3.

The hook sensor 65 is attached to the hook 30, detects whether the hook 30 is hooked on the main rope P such as a rope, a metal pipe, a metal rod or the like, and the detected data is detected by the controller 63. To send to. For example, as shown in FIG. 6 and FIG. 7, a pair of switch pieces 65a and 65b are arranged facing each other in a normally separated state via a spring 65c at a portion of the main body 31 of the hook 30 where the master rope is hooked. 30 is hooked on the main rope so that the spring 65
Both switch pieces 65a and 65b are configured to contact each other against c. Of course, if the hook sensor 65 can detect whether or not the hook 30 is hooked, the specific structure thereof is not particularly limited to the above structure.

The speaker 66 is for giving a warning, and the warning is given by voice, sound or the like. Here, the warning is a concept that includes not only literal warning but also notification.

When the worker wears the trunk belt 10 having the above-mentioned warning means 60, the wearing switch 62 is turned on, and the power from the power supply 61 is supplied to the control section 63 and other parts of the warning means 60. When supplied, the warning means 60 is in an operating state, and the height sensor 64 and the hook sensor 65 are in an operating state. As a result, the height of the worker (body belt 10) is detected by the height sensor 64, the state of the hook 30 is detected by the hook sensor 65, and the data or information thereof is sent to the control unit 63. As shown in FIGS. 8 and 9, when the worker climbs on a stepladder, a work scaffold, or the like, the distance from the ground or floor where the worker is located, that is, the height is a predetermined reference height Ls, For example, when the distance is 1.8 meters or more, the control unit 63 gives a warning through the speaker 66, but at this time, when the hook 30 is hooked on the master rope P by the information from the hook sensor 65 (actually, the hook sensor 65 is used. (When the pair of switch pieces 65a and 66b are in contact with each other), no warning is given because safety measures have already been taken. On the other hand, when the hook 30 is not hooked on the master rope P even though the height is equal to or higher than the reference height Ls, a warning is actually given through the speaker 66.

The height sensor 64 should normally detect a certain height or more when the trunk belt 10 is worn by an operator.
If the detected value of is less than or equal to a predetermined minimum distance Lx, the control unit 63 determines that the height sensor 64 prevents normal detection due to an obstacle or the like, and the warning is given through the speaker 66. The control unit 63 can be configured to give another warning. As a result, for example, an operator or the like closes the front of the height sensor 64, and the reference height L is actually set.
It is possible to prevent it from being undetected even if it is over s. The minimum distance Lx can be set to, for example, several centimeters to ten and several centimeters by an experiment.

An example of the control operation of the alarm means 60 will be described with reference to FIG. Now, when the worker wears the trunk belt 10 (Yes in step S1), the wearing switch 62 is turned on and the power source 51 is turned on (step S2). In this state, when the height sensor 64 detects a certain reference height Ls or more (YES in step S3), the control unit 63 further determines whether or not the hook sensor 65 detects the hooked state of the hook 30. If it is judged (step S4) and it is not caught (NO in step S4),
A warning that the hook should be hooked is given through the speaker 66 (step S5). For the warning, one or a plurality of kinds of sounds and sounds are stored in the control unit 63 in advance, and the kinds of the sounds and sounds are changed according to the elapsed time from the start of the warning and the number of times of warning. Good. The wording of the warning voice is not particularly limited as long as it complies with the purpose. Of course, even when the hook 30 is hooked in step S4 (Yes in step S4), a confirmation voice may be played once to confirm whether or not the hook 30 is definitely hooked on the master rope P. . On the other hand, in step S3, the height sensor 6
When 4 does not detect the reference height Ls or more,
When the height sensor 64 detects the minimum distance Lx or less (Yes in step S6), the control unit 64 causes the speaker 6 to operate.
A warning that the height sensor 64 has an obstacle is given through 6 (step S7). Alternatively, a warning or the like indicating that the height sensor 64 is not normally detected is issued. The warning can be given by voice, sound or the like. Naturally, this warning is different from the warning in step S5.

In the above description, when the hook sensor 65 detects the hook 30 being caught, the warning is not issued even when the height sensor 64 detects the reference height Ls or more. There is. However, if the hook sensor 65 breaks down or otherwise falls into a state in which the hook 30 is in a hooked state even though the hook 30 is not actually hooked, a problem occurs. Therefore, as another additional embodiment of the present invention, FIG.
As shown in FIG. 6, a lifeline sensor 67 for detecting the payout length of the lifeline 20 is added as an element of the warning means 60, and when the lifeline sensor 67 does not detect a fixed reference payout length Ms or more, for example, Hook sensor 65 is hook 3
Even when the hooking of 0 is detected (when step S4 is YES in the flowchart of FIG. 10), it is determined that the hook 30 is not actually hooked on the lifeline P or the like, and a warning is issued (FIG. (Similar to step S5 of the flowchart of FIG. 10). In the above description, the lifeline sensor 67 is a sensor that detects how much the winding reel of the winding means 21 of the lifeline 20 has rotated from the winding reference position, and the lifeline 20 is detected by the control unit 63 from the detected rotation amount. Can be configured to calculate the payout length of As for the reference payout length Ms, an appropriate length such as a length of several tens of centimeters is determined in advance by an experiment and stored in the control unit 63.

In the above, the height sensor 64 is provided as a component of the warning means 60, and the height sensor 64 is
The torso belt 10 is directed downward with the worker wearing the belt, and the distance (height) to the ground or floor where the worker is located is detected. However, FIG. 11 and FIG.
As shown in 2, when the worker is on a workbench at a high place or at a high position of stairs, the area directly below the operator is not high, but the area directly below the operator is slightly higher. There are cases where the place is off and there is no floor, etc. It can be said that such a place is a dangerous high place where a worker may fall. Therefore, as another additional embodiment of the present invention, as shown in FIG.
As an element of 0, in addition to the height sensor 64, an oblique high distance sensor 68 for detecting an obliquely downward distance is added, and the oblique high distance sensor 68 detects a predetermined reference oblique height distance Ly or more. Even if the height sensor 64 detects less than the reference height Ls, the warning may be issued as long as the hook 30 is not hooked. Like the height sensor 64, the oblique height distance sensor 68 can be configured by a distance sensor using sound waves such as ultrasonic waves, light such as laser light, radio waves, and other electromagnetic waves. The oblique high-distance sensor 68 is attached so that the source of the oblique high-distance sensor 68 faces obliquely downward, for example, obliquely downward at 45 degrees when worn by an operator. Alternatively, it is attached so that the distance diagonally below can be detected. The reference slope height distance Ly can be determined in advance by an appropriate distance by experiment and stored in the control unit 63. For example, the reference height Ls is 1.
If it is 8 meters and the measuring direction is diagonally 45 degrees downward,
It can be 2.5 meters. Of course, the oblique height sensor 68 does not need to be able to accurately measure the distance itself. It may be a sensor that can determine whether the slope height distance is larger or smaller than the reference slope height distance Ly. Further, the oblique high distance sensor 68 may be switched to the switch-off state as needed.

[0019]

According to the present invention, the safety belt device for working in high places has a body belt detachably attached to an operator and the body belt. Safety for aerial work, which is equipped with at least a lifeline that is attached and can be paid out, and a hook that is attached to the lifeline. A belt device, which has a height sensor for detecting the height position of the torso belt, and the height sensor detects a certain reference height or more in a state in which the operator wears the torso belt. Since the warning means is provided so as to give a warning when the hook is not in the hooked state, the worker wearing the torso belt detects whether or not the user is at a high place and uses a lifeline. To detect whether or not Only it can be carried out reliably warning if you do not have a lifeline to that. Therefore, according to the safety belt device for working at high places according to claim 1, the safety belt (body belt) is worn by eliminating the warning that diminishes the effect, which is performed even when it is not actually dangerous. Only when the worker is at a high place and is really dangerous, it is possible to reliably and seriously warn that the hook of the lifeline has not been hooked up, and the worker can be more surely and efficiently ensured the safety (operation of the cook). It is possible to perform the action of hanging on a rope). Claim 2
According to the safety belt device for high-place work described in (1), in addition to the effect of the configuration described in (1), the warning means also gives a warning even when the height sensor indicates a certain minimum distance or less With this configuration, when the height sensor is obstructed by obstacles, etc. and is not working normally, it is possible to eliminate such a state by a warning, so that the height sensor operates normally. As a result, a warning for ensuring necessary safety can be given more reliably when needed. According to the safety belt device for high-place work described in claim 3, in addition to the effect of the configuration described in claim 1 or 2, the warning means detects that the height sensor detects a certain reference height or more. If the lifeline has not been extended for a certain standard length while
Since it is configured to give a warning regardless of whether the hook is hooked or not, even if the hook is not actually hooked to the main rope, it will be as if it is hooked and the warning will be issued. It is possible to surely prevent the unprocessed information from being left unattended, and it is possible to reliably give a necessary safety warning when necessary. Claim 4
According to the safety belt device for high-place work described in [1], in addition to the effect of the configuration according to any one of the above [1] to [3], the warning means detects a diagonally downward distance in addition to the height sensor. Even if the slope height distance sensor is provided and the height sensor does not detect a certain reference height or more, the hook is caught when the slope height distance sensor detects a certain reference slope height or more. Since it is configured to issue a warning when it is not in a closed state, the height is not high in the area directly below the worker, but it seems that there is no floor, etc., just outside the area directly below the operator. Even in such a case, it is possible to reliably warn the operator of the use of the lifeline, and it is possible to further enhance the safety work of the operator. Further, according to the safety belt device for high-place work according to claim 5, in addition to the effect of the configuration according to any one of claims 1 to 4, the warning means is a state in which the worker wears the trunk belt. Since it has a wearing switch that turns on the power when it is in, the warning means operates only when the worker is wearing the torso belt, and it is possible to suppress wasteful consumption of power and The life of the power supply can be substantially extended.

[Brief description of drawings]

FIG. 1 is an external view showing a state in which a worker wears a safety belt device for working at high places according to an embodiment of the present invention.

FIG. 2 is a front view of the safety belt device for working at high places according to the embodiment of the present invention.

FIG. 3 is a bottom view of the safety belt device for working at high places according to the embodiment of the present invention.

FIG. 4 is a sectional view of a storage case.

FIG. 5 is a block wiring diagram of alarm means.

FIG. 6 is a front view of a hook.

FIG. 7 is a sectional view of a main part of a hook.

FIG. 8 is a diagram illustrating the operation of the device according to the embodiment.

FIG. 9 is a view for explaining the operation of the device according to the embodiment.

FIG. 10 is a flowchart illustrating a control operation of an alarm unit of the device according to the embodiment.

FIG. 11 is a diagram illustrating another embodiment of the present invention.

FIG. 12 is a diagram illustrating another embodiment of the present invention.

[Explanation of symbols]

10 trunk belt 11 buckles 20 Lifeline 21 winding means 22 Shock absorber 30 hooks 40 storage cases 50 bags 60 Warning means 61 power supply 62 Wearing switch 63 control unit 64 height sensor 64a Source 65 hook sensor 65a switch piece 65b switch piece 65c spring 66 speakers 67 Lifeline Sensor 68 Oblique high distance sensor P parent rope

Claims (5)

(57) [Claims] 1. At least a trunk belt removably attached to an operator, a lifeline attached to the trunk belt and extending, and a hook attached to the lifeline. The hook is a master rope. A safety belt device for aerial work, which is designed to ensure safety in aerial work by being hooked on the body, etc., and has a height sensor that detects the height position of the torso belt, and In a worn state, the height sensor detects a certain reference height or more, but when the hook is not in the hooked state, a warning means is provided for giving a warning. Safety belt device for work in high places. 2. The safety belt apparatus for high-place work according to claim 1, wherein the warning means is configured to give a warning even when the height sensor indicates a predetermined minimum distance or less. 3. The warning means determines whether or not a hook is hooked when the lifeline is not extended beyond a predetermined reference extension length when the height sensor detects a predetermined reference height or higher. The safety belt device for high-altitude work according to claim 1 or 2, wherein a warning is given regardless of whether the safety belt device is for high places. 4. The warning means includes, in addition to the height sensor, an oblique height distance sensor for detecting an obliquely downward distance, and the oblique height is detected even when the height sensor does not detect a predetermined reference height or more. When the distance sensor detects a certain reference oblique height distance or more, a warning is issued when the hook is not in a hooked state.
The safety belt device for work in high places according to any one of 3 above. 5. The safety belt apparatus for high-place work according to claim 1, wherein the warning means has a wearing switch for turning on the power when the worker is wearing the torso belt.