JP2021004513A - Portable working table - Google Patents

Portable working table Download PDF

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JP2021004513A
JP2021004513A JP2019119536A JP2019119536A JP2021004513A JP 2021004513 A JP2021004513 A JP 2021004513A JP 2019119536 A JP2019119536 A JP 2019119536A JP 2019119536 A JP2019119536 A JP 2019119536A JP 2021004513 A JP2021004513 A JP 2021004513A
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worker
load
top plate
workbench
portable
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康全 落合
Yasumasa Ochiai
康全 落合
長谷川 聡
Satoshi Hasegawa
聡 長谷川
中島 慶太
Keita Nakajima
慶太 中島
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DAIDO KIKAI KK
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Abstract

To provide a portable working table that allows a worker to ascend and perform a work in a construction site which prevents the worker from falling off from the working table and being damaged, and solves the problem when the worker is absorbed in the work and performs a difficult work.SOLUTION: In a portable working table that allows a worker having a low level of skill in a construction site to ascend and perform a work, load meters are arranged in each leg part of the working table and a dangerous state of the worker is detected by the pattern of a load.SELECTED DRAWING: Figure 1

Description

本発明は、建築工事現場等で使用するのに適した可搬式作業台に関する。 The present invention relates to a portable workbench suitable for use at a construction site or the like.

建築工事現場等では、高所での配線工事や壁板のねじ止め作業を行うために頻繁に可搬式作業台が使用される。可搬式作業台は様々な大きさ、形状のものがあるが共通する特徴は、作業者が作業台の天板上に上るための梯子の機能を併せ持つ4つの足で天板を支えた構造を備えることである。作業台はその幅が600ミリメートル程度で長さは1メートルから数メートルというものが一般的である。 At construction sites, portable workbenches are frequently used for wiring work at high places and screwing work on wall boards. Portable workbenches come in a variety of sizes and shapes, but a common feature is the structure in which the top plate is supported by four legs that also function as a ladder for workers to climb on the top plate of the workbench. Be prepared. The workbench is generally about 600 mm wide and 1 to several meters long.

可搬式作業台の上で作業している作業者は細い天板上を移動しながら高所で作業をしているので落下して怪我をするリスクを常に抱えている。このため、落下のリスクを軽減する様々な工夫を施した作業台が開発されている。特許文献1では、天板上の作業者が天板の妻側端部に近づいたことがわかるように感知棒を立てた構造の作業台について説明している。高所での作業に夢中になっていて妻側端部に近づいてしまったら棒に触れて、作業者が落下する前に気がつくことを狙った工夫である。特許文献2、特許文献3にも、特許文献1と同様の目的の報知バー、安全ロッドについての説明がある。非特許文献1では、可搬式作業台が作業者が転落する危険がある器具として多くの注意喚起を行っている。 Workers working on a portable workbench are always at risk of falling and getting injured because they are working at heights while moving on a thin top plate. For this reason, workbenches have been developed with various measures to reduce the risk of falling. Patent Document 1 describes a workbench having a structure in which a sensing rod is erected so that an operator on the top plate can be seen to have approached the end of the top plate on the gable side. This is a device that aims to be noticed before the worker falls by touching the stick when he is absorbed in working at a high place and approaches the end on the side of his wife. Patent Document 2 and Patent Document 3 also describe a notification bar and a safety rod for the same purpose as in Patent Document 1. In Non-Patent Document 1, a portable workbench gives a lot of attention as an instrument in which a worker may fall.

特開2012−92618号公報(第10頁、図1)Japanese Unexamined Patent Publication No. 2012-92618 (page 10, FIG. 1) 特開2013−209803号公報(第11頁、図1)Japanese Unexamined Patent Publication No. 2013-209803 (page 11, FIG. 1) 特開2016−204851号公報(第10頁、図1)Japanese Unexamined Patent Publication No. 2016-204851 (page 10, FIG. 1)

可搬式作業台からの連絡災害をなくすには 一般社団法人軽仮設リース業協会(〒101−0052 東京都千代田区神田小川町2−2サンブリヂ小川町ビル4F)Contact from a portable workbench To eliminate accidents, the Light Temporary Leasing Association (4th floor, Sunbridge Ogawamachi Building, 2-2 Kanda Ogawamachi, Chiyoda-ku, Tokyo 101-0052)

従来の可搬式作業台では、天板上の作業者が作業に夢中になって天板から足を踏み外して転落するリスクを抱えていた。この課題を低減するための方策が上記背景技術の説明の中でも各種なされているが、いずれもリスク低減の手間がかかることやリスク低減が不十分である課題を抱えていた。感知棒などを作業者が面倒がって立てなければ感知棒などによる落下軽減効果は期待できない。また、感知棒等が天板上での作業を妨害してしまうこともあった。 In the conventional portable workbench, there is a risk that the worker on the top plate gets absorbed in the work and steps off the top plate and falls. Various measures for reducing this problem have been made in the explanation of the background technology described above, but all of them have problems that it takes time and effort to reduce the risk and the risk reduction is insufficient. Unless the operator takes care of standing up the sensing rod, the fall reduction effect of the sensing rod cannot be expected. In addition, the sensing rod or the like may interfere with the work on the top plate.

本発明の可搬式作業台は、当該作業台の各々の脚部に荷重計を配置して荷重のパターンによって作業者が危険な状況にあることを検知することを第1の特徴とし、
第2に、第1の特徴に加えて当該作業台の階段を作業者が昇降している状態と天板上に居る状態とを区別することを特徴とし、
第3に、第1または第2の特徴に加えて、作業者が当該作業台の天板上に一歩脚をかけた時点から前記各々の荷重計が作動し、その後、当該作業台上の天板に作業者がいない状態で前記各々の荷重計が休止状態になることを特徴とし、
第4に、第1から第3のいずれかの特徴に加えて、前記各々の荷重計が当該作業台の脚部と天板部の境界位置に取り付けられていることを特徴とする。
The first feature of the portable workbench of the present invention is that a load gauge is placed on each leg of the workbench to detect that the worker is in a dangerous situation by the load pattern.
Secondly, in addition to the first feature, it is characterized in that it distinguishes between the state in which the worker is moving up and down the stairs of the workbench and the state in which the worker is on the top plate.
Thirdly, in addition to the first or second feature, each of the load meters operates from the time when the worker puts a step on the top plate of the workbench, and then the heaven on the workbench. The feature is that each of the load meters is in a dormant state when there is no worker on the board.
Fourth, in addition to any of the first to third features, each of the load meters is attached at a boundary position between the legs and the top plate of the workbench.

本発明の可搬式作業台は、当該作業台の各々の脚部に荷重計を配置して荷重のパターンによって作業者が危険な状況にあることを検知する第1の特徴を有している場合には、各々の脚部に均等に荷重されていることを荷重計が検知した際には、作業者が安全な位置にあると判定し、いずれかの1つの脚部に荷重が集中していることを検知した際には、角部の転倒リスクの高い位置に作業者が立っていると判定し、隣接する2つの脚部に荷重が集中していることを検知した際にはその2つの脚部で構成される梯子上または梯子周辺の天板上に作業者が居ると判定し、それ以外の隣接する2つの脚部に荷重が集中していることを検知した際には、作業台が横転するリスクまたは作業者が転落するリスクが大きい状態と判定することで、作業者が危険な状態にあるか安全な状態にあるかを総合判定することができる。
第2に、第1の特徴に加えて当該作業台の階段を作業者が昇降している状態と天板上に居る状態とを区別する第2の特徴を有する場合には、作業者が壁工事や天井工事などの作業に気をとられて自身が転落のリスクのある状況になっても気づきにくい天板上に居る場合と作業者が昇降という行為に集中していることが多い階段上にいることを区別することで作業者が危険な状態にあるか安全な状態にあるかを総合判定することができる。また、作業者が階段を昇り天板で作業を行ってその後に階段を降りるという作業者の一連の行動を把握することで作業者の行動の流れを把握することができる。
第3に、第1または第2の特徴に加えて、作業者が当該作業台の天板上に一歩脚をかけた時点から前記各々の荷重計が作動し、その後、当該作業台上の天板に作業者がいない状態で前記各々の荷重計が休止状態になる第3の特徴を有している場合には、作業者が壁工事や天井工事に夢中になって転落リスクが高まっていることに気づきにくい天板上に居る時に荷重計が自動的に作動し、天板から降りた際には荷重計が自動的に休止状態になることで、当該作業台が搭載している電池を長期間有効に保持することができる。荷重計の作動時および休止時にそれぞれの状態を知らせる音や光を発する場合には作業者が荷重計の作動と休止を知ることができる。
第4に、第1から第3のいずれかの特徴に加えて、前記各々の荷重計が当該作業台の脚部と天板部の境界位置に取り付けられている第4の特徴を有する場合には、作業者が天板上にいることを明確に検知することができる。
When the portable work table of the present invention has the first feature of arranging a load meter on each leg of the work table and detecting that the worker is in a dangerous situation by the load pattern. When the load meter detects that the load is evenly applied to each leg, it is determined that the operator is in a safe position, and the load is concentrated on one of the legs. When it is detected that the worker is standing at a position where there is a high risk of tipping over at the corner, and when it is detected that the load is concentrated on the two adjacent legs, that 2 When it is determined that the worker is on the ladder composed of one leg or on the top plate around the ladder, and it is detected that the load is concentrated on the other two adjacent legs, the work is performed. By determining that the risk of the table overturning or the risk of the operator falling is high, it is possible to comprehensively determine whether the operator is in a dangerous state or a safe state.
Second, if, in addition to the first feature, the worker has a second feature that distinguishes between the state in which the worker is moving up and down the stairs of the workbench and the state in which the worker is on the top plate, the worker is on the wall. Even if you are distracted by work such as construction and ceiling work and you are in a situation where you are at risk of falling, it is difficult to notice when you are on the top plate and on the stairs where workers are often concentrated on the act of going up and down By distinguishing between the two, it is possible to comprehensively judge whether the worker is in a dangerous state or a safe state. In addition, the flow of the worker's actions can be grasped by grasping the series of actions of the worker that the worker goes up the stairs, works on the top plate, and then goes down the stairs.
Thirdly, in addition to the first or second feature, each of the load meters operates from the time when the worker puts a step on the top plate of the workbench, and then the ceiling on the workbench. When each of the load meters has a third feature of being in a dormant state when there is no worker on the board, the worker is absorbed in wall construction and ceiling construction, and the risk of falling is increased. The load meter automatically operates when you are on the top plate, which is difficult to notice, and the load meter automatically goes into hibernation when you get off the top plate, so that the battery mounted on the workbench is released. It can be effectively held for a long period of time. The operator can know the operation and suspension of the load meter by emitting a sound or light indicating the respective states when the load meter is operating and when the load meter is stopped.
Fourth, in addition to any of the first to third features, when each of the load meters has a fourth feature attached at the boundary position between the legs and the top plate of the workbench. Can clearly detect that the worker is on the top plate.

本発明の実施例の斜視図である。It is a perspective view of the Example of this invention.

本発明の第1の実施例を図1に示す。可搬式作業台1は、天板2と天板を支える4本の脚3、そしてそれぞれの脚の上部の天板との境界部分に配置された荷重計4で構成されている。作業者は前記脚の間を渡す形で配置した梯子段5に足をかけて天板まで昇り、天板上を移動しながら高所での作業を行う。本実施例では、荷重計が脚の最上部に付いているので、作業者が梯子段を上っている間はどの脚の荷重計も作業者の荷重を感じることはないが、天板に昇った瞬間にその昇ってきた梯子段が取り付けられている脚の2つの荷重計が作業者の荷重を検知する。作業者が天板の幅の中央部に足をかけた場合には作業者の体重が前記2つの荷重計に均等に検知されることになる。天板の幅の右よりに足をかけた場合には右よりの脚に取り付けられた荷重計が左よりの脚に取り付けられた荷重計よりも大きな荷重を検知することになる。残る2つの脚に取り付けられた荷重計で検知される荷重は前記2つの荷重計で検知される荷重よりもはるかに小さい。この実施例では、作業者が天板に足をかけて、4つの荷重計のうちの2つの荷重計が他の荷重計よりも一定以上の荷重を感じた際にブザーが鳴るように設定してある。4つの荷重計のうちの2つの荷重計が他の荷重計よりも一定以上の荷重とは、前者の荷重計の合計値が後者の荷重計の合計値の10倍といった荷重差である。 A first embodiment of the present invention is shown in FIG. The portable workbench 1 is composed of a top plate 2, four legs 3 that support the top plate, and a load meter 4 arranged at a boundary portion between the upper part of each leg and the top plate. The worker puts his foot on the ladder step 5 arranged so as to pass between the legs, climbs up to the top plate, and works at a high place while moving on the top plate. In this embodiment, since the load meter is attached to the top of the leg, the load meter of any leg does not feel the load of the worker while the worker is climbing the ladder step, but it rises to the top plate. At that moment, the two load meters on the legs to which the rising ladder steps are attached detect the load of the operator. When the worker puts his foot on the center of the width of the top plate, the weight of the worker is evenly detected by the two load meters. When the foot is placed on the width of the top plate from the right side, the load meter attached to the leg from the right side detects a larger load than the load meter attached to the leg from the left side. The load detected by the load meters attached to the remaining two legs is much smaller than the load detected by the two load meters. In this embodiment, the buzzer is set to sound when the operator puts his foot on the top plate and two of the four load meters feel a load higher than a certain level than the other load meters. There is. When two of the four load meters have a load greater than a certain value than the other load meters, the load difference is such that the total value of the former load meter is 10 times the total value of the latter load meter.

実施例1においては、作業者が天板上で作業している状況で、4つの荷重計のそれぞれの荷重計で検知する荷重の比率で作業者の転落リスクを検知する。4つの荷重計の平均値に対して、いずれか1つの荷重計だけが2倍または1/2の荷重を検知した場合には作業者が天板の四隅の1箇所に踏み入れて転落するリスクが高まったと判定して警告のブザーを鳴らす。隣接する2つの荷重計の合計値が他の隣接する荷重計の合計値の2倍または1/2の荷重を検知した場合には天板の4辺のいずれかの淵に踏み入れて転落するリスクが高まったと判定して警告ブザーを鳴らす。警告は騒音が大きい環境ではフラッシュランプで行う場合もある。なお、荷重計としてはロードセルを用いる場合がある。また、上記演算のためのマイコンなどの演算デバイスをこの実施例の作業台は搭載してある。 In the first embodiment, in a situation where the worker is working on the top plate, the risk of the worker falling is detected by the ratio of the load detected by each of the four load meters. If only one of the four load meters detects a load that is double or 1/2 of the average value of the four load meters, there is a risk that the operator will step into one of the four corners of the top plate and fall. It judges that it has risen and sounds a warning buzzer. If the total value of two adjacent load meters detects a load that is twice or 1/2 the total value of other adjacent load meters, there is a risk of stepping on any of the four sides of the top plate and falling. Sounds a warning buzzer. The warning may be given by a flash lamp in a noisy environment. A load cell may be used as the load cell. Further, the workbench of this embodiment is equipped with an arithmetic device such as a microcomputer for the above arithmetic.

作業者が天板上での作業を終了して梯子段を下りる直前にはその梯子段が渡されている脚に取り付けられた計2つの荷重計の合計値が残りの2つの荷重計の合計値よりも大幅に大きな値となる。例えば10倍の値になる。10倍の値を超えた場合には作業者が梯子を降りようとしていると判定して天板上での作業者向けの警告ブザーとは異なる音質のブザーを鳴らす。実施例1の作業台では以上述べたとおり、天板上での作業の開始と終了を知らせるブザーと、転落リスクが高まったことを知らせる警告ブザーの2通りのブザーを鳴らすという特徴を持っている。 Immediately before the worker finishes the work on the top plate and goes down the ladder step, the total value of the two load meters attached to the leg to which the ladder step is passed is calculated from the total value of the remaining two load meters. Is also a significantly larger value. For example, the value is 10 times. If the value exceeds 10 times, it is determined that the worker is about to get off the ladder, and a buzzer with a sound quality different from the warning buzzer for the worker on the top plate is sounded. As described above, the workbench of the first embodiment has a feature of sounding two types of buzzers, a buzzer for notifying the start and end of work on the top plate and a warning buzzer for notifying that the risk of falling has increased. ..

本発明の実施例2について説明する。作業台の構成は図1で示したものと同様である。本実施例では、作業者が天板に昇った瞬間を検知し、また、作業者が天板から降りた瞬間を検知し、この2つの瞬間の間の期間を作業者が天板上に存在する期間と認識して、作業者の天板上での安全管理を行うことを特徴としている。この認識は作業台に搭載しているマイコンで認識し、この認識情報および実施例1と同様の転落リスク情報は無線通信によって近接する指令所に送信されて、記録を保管するとともに指令所で表示されるようにシステム全体が構成されている。この指令所での情報は作業者の現在位置の把握による工事現場全体の安全管理に使用するとともに、頻繁に転落リスクを生じさせている作業者に対するコーチングに利用する。 Example 2 of the present invention will be described. The configuration of the workbench is the same as that shown in FIG. In this embodiment, the moment when the worker rises to the top plate is detected, the moment when the worker descends from the top plate is detected, and the worker exists on the top plate during the period between these two moments. It is characterized by recognizing that it is a period of time and performing safety management on the top plate of the worker. This recognition is recognized by the microcomputer mounted on the workbench, and this recognition information and the same fall risk information as in Example 1 are transmitted to a nearby command center by wireless communication, and the record is stored and displayed at the command center. The entire system is configured to do so. The information at this command center will be used for safety management of the entire construction site by grasping the current position of the worker, and will also be used for coaching for workers who frequently cause a fall risk.

本発明の実施例3について説明する。実施例1で説明した図1の構成の作業台において、作業者が天板に居る期間だけ荷重計が作動し、それ以外の時間帯は休止状態である作業台の例である。荷重計の休止状態とは、まったく荷重を検知しない状態ではなく、最低限の電力消費状態で荷重を検知して、荷重を検知したら回路全体がフルに機能するウェークアップ機能を有している状態である。実施例1の方法で作業者が天板に昇った瞬間を検知したら回路をウェークアップさせて、天板上の作業者の転落リスクを検知し、作業者が天板から降りた瞬間を検知したら休止状態となる実施例である。 Example 3 of the present invention will be described. This is an example of a workbench having the configuration shown in FIG. 1 described in the first embodiment, in which the load meter operates only while the worker is on the top plate and is in a dormant state at other times. The hibernation state of the load meter is not a state in which the load is not detected at all, but a state in which the load is detected in the minimum power consumption state and the entire circuit has a wake-up function when the load is detected. is there. When the moment when the worker rises to the top plate is detected by the method of the first embodiment, the circuit is waked up, the risk of the worker falling on the top plate is detected, and when the moment when the worker descends from the top plate is detected, the circuit is stopped. It is an example which becomes a state.

本発明の実施例4について説明する。実施例1で示した図1の構成に加えて、4つの脚の下端部、つまり接地側に荷重計を備えている例である。実施例1から3では、作業者が梯子段を昇っている状況では荷重を検知していないが、本実施例では梯子段を昇っている期間についても作業者の荷重を検知できる。梯子段を昇っている期間を検知することで天板に移動したことまたは天板から梯子段に移動したことをより明確に認識して天板上および梯子段上の作業者の転落リスク検知を高めた実施例である。梯子段を昇って期間でどちらか一方の荷重が大幅に増えて他方がその分減った場合には作業者が梯子段の途中で大きく身を乗り出していると推定されるので転落リスクが高く、警告ブザーを鳴らすなどする。 Example 4 of the present invention will be described. In addition to the configuration of FIG. 1 shown in the first embodiment, this is an example in which a load meter is provided at the lower ends of the four legs, that is, on the ground side. In the first to third embodiments, the load is not detected when the worker is climbing the ladder step, but in this embodiment, the load of the worker can be detected even during the period when the worker is climbing the ladder step. By detecting the period of climbing the ladder step, it is more clearly recognized that it has moved to the top plate or moved from the top plate to the ladder step, and the risk of falling of the workers on the top plate and the ladder step has been enhanced. This is an example. If the load on one side increases significantly during the period of climbing the ladder step and the load on the other side decreases by that amount, it is estimated that the worker is leaning forward in the middle of the ladder step, so there is a high risk of falling and a warning buzzer. And so on.

1 可搬式作業台
2 天板
3 脚
4 荷重計
5 梯子段

1 Portable workbench 2 Top plate 3 Legs 4 Load meter 5 Ladder step

Claims (4)

可搬式作業台において、当該作業台の各々の脚部に荷重計を配置して荷重のパターンによって作業者が危険な状況にあることを検知することを特徴とする可搬式作業台。 In a portable workbench, a load meter is arranged on each leg of the workbench to detect that a worker is in a dangerous situation by a load pattern. 請求項1の可搬式作業台において、当該作業台の階段を作業者が昇降している状態と天板上に居る状態とを区別することを特徴とする可搬式作業台。 The portable workbench according to claim 1, wherein the state in which the worker is moving up and down the stairs of the workbench is distinguished from the state in which the worker is on the top plate. 請求項1または請求項2の可搬式作業台において、作業者が当該作業台の天板上に一歩脚をかけた時点から前記各々の荷重計が作動し、その後、当該作業台上の天板に作業者がいない状態で前記各々の荷重計が休止状態になることを特徴とする可搬式作業台。 In the portable workbench according to claim 1 or 2, each of the load meters operates from the time when the worker puts a step on the top plate of the workbench, and then the top plate on the workbench. A portable workbench characterized in that each of the load meters is in a dormant state in the absence of an operator. 請求項1から請求項3のいずれかの可搬式作業台において、前記各々の荷重計が当該作業台の脚部と天板部の境界位置に取り付けられていることを特徴とする可搬式作業台。


A portable workbench according to any one of claims 1 to 3, wherein each of the load meters is attached to a boundary position between a leg portion and a top plate portion of the workbench. ..


JP2019119536A 2019-06-27 2019-06-27 Portable working table Pending JP2021004513A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7350275B1 (en) 2023-03-07 2023-09-26 アティラ オトボッシュ workbench and stepladder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001140567A (en) * 1999-11-16 2001-05-22 Taisei Corp Stepladder
JP3084372U (en) * 2001-07-25 2002-03-22 郭 晶耀 Ladder load monitoring device
JP2018071064A (en) * 2016-10-25 2018-05-10 株式会社中電工 Stepladder monitoring device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001140567A (en) * 1999-11-16 2001-05-22 Taisei Corp Stepladder
JP3084372U (en) * 2001-07-25 2002-03-22 郭 晶耀 Ladder load monitoring device
JP2018071064A (en) * 2016-10-25 2018-05-10 株式会社中電工 Stepladder monitoring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7350275B1 (en) 2023-03-07 2023-09-26 アティラ オトボッシュ workbench and stepladder

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