JP5255822B2 - Safety equipment for truck mounted cranes - Google Patents

Safety equipment for truck mounted cranes Download PDF

Info

Publication number
JP5255822B2
JP5255822B2 JP2007304335A JP2007304335A JP5255822B2 JP 5255822 B2 JP5255822 B2 JP 5255822B2 JP 2007304335 A JP2007304335 A JP 2007304335A JP 2007304335 A JP2007304335 A JP 2007304335A JP 5255822 B2 JP5255822 B2 JP 5255822B2
Authority
JP
Japan
Prior art keywords
load
limit
truck
boom
detection means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2007304335A
Other languages
Japanese (ja)
Other versions
JP2009126652A (en
Inventor
石井  正裕
裕亮 草薙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tadano Ltd
Original Assignee
Tadano Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tadano Ltd filed Critical Tadano Ltd
Priority to JP2007304335A priority Critical patent/JP5255822B2/en
Publication of JP2009126652A publication Critical patent/JP2009126652A/en
Application granted granted Critical
Publication of JP5255822B2 publication Critical patent/JP5255822B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Control And Safety Of Cranes (AREA)
  • Jib Cranes (AREA)

Description

本発明は、荷台を備えたトラックに搭載されるトラック搭載型クレーンの安全装置に関するものである。   The present invention relates to a safety device for a truck-mounted crane mounted on a truck provided with a loading platform.

この種のトラック搭載型クレーンの安全装置では、アウトリガ(ジャッキ)に作用する負荷を検出する負荷検出手段を配置し、当該負荷検出手段により検出される負荷が予め設定した所定値以下になると安定限界信号を出力してクレーンの作動を停止させるようにしている。また、伸縮ブームに作用する負荷の限界値としてトラック搭載型クレーンの構造物の強度によって定まる強度限界値を伸縮ブームの姿勢(伸縮ブームの起伏角度および長さで定まる姿勢)から求め、伸縮ブームに作用する負荷が強度限界値に達するとクレーンの作動を停止させるようにしている。   In this type of truck-mounted crane safety device, load detection means for detecting the load acting on the outrigger (jack) is arranged, and when the load detected by the load detection means falls below a predetermined value set in advance, the stability limit A signal is output to stop the operation of the crane. In addition, as the limit value of the load acting on the telescopic boom, the strength limit value determined by the strength of the structure of the truck-mounted crane is obtained from the posture of the telescopic boom (the posture determined by the undulation angle and length of the telescopic boom). When the acting load reaches the strength limit value, the crane is stopped.

すなわち、この種のトラック搭載型クレーンの安全装置は、アウトリガ(ジャッキ)による安定限界と、伸縮ブームに作用する負荷の強度限界とを監視してトラックの転倒防止やクレーンブームの折損を防止しトラック搭載型クレーンのクレーン作業の安全を確実に確保をするようにしている。(例えば特許文献1参照)
特開平8−73189号公報(第2頁、第5頁、図1)
That is, this kind of truck-mounted crane safety device monitors the stability limit by the outrigger (jack) and the strength limit of the load acting on the telescopic boom to prevent the truck from falling and the crane boom from breaking. The safety of the crane work of the on-board crane is surely ensured. (For example, see Patent Document 1)
JP-A-8-73189 (2nd page, 5th page, FIG. 1)

ところが、上記トラック搭載型クレーンの安全装置は、アウトリガ(ジャッキ)に作用する負荷を検出する負荷検出手段が故障してしまうと、アウトリガ(ジャッキ)による安定限界の監視ができなくなり、危険なクレーン作業となってしまうものである。 However, the safety device for the above-mentioned truck-mounted crane cannot monitor the stability limit by the outrigger (jack) if the load detection means for detecting the load acting on the outrigger (jack) breaks down. It will become.

本発明は、このような状況下でも安全なクレーン作業を可能にするトラック搭載型クレーンの安全装置を提供することを目的とする。   An object of the present invention is to provide a truck-mounted crane safety device that enables safe crane work even under such circumstances.

上記の目的を達成するため、本発明に係る請求項1記載のトラック搭載型クレーンの安全装置は、荷台を備えたトラックに搭載されるトラック搭載型クレーンであって、ブーム長さを検出するブーム長さ検出手段と、ブーム角度を検出するブーム角度検出手段と、吊荷によりブームに作用する負荷を検出する負荷検出手段と、アウトリガの支持力を検出する支持力検出手段と、ブーム長さ検出手段とブーム角度検出手段とからの検出値に基づいてクレーンの強度から決定される負荷限界性能を予め記憶しておき当該負荷限界性能と負荷検出手段で検出される実際負荷とを比較し実際負荷が負荷限界性能に達すると負荷限界信号を出力する負荷限界監視制御手段と、支持力検出手段により検出される実際支持力と予め記憶している転倒防止のための安定支持限界性能とを比較して実際支持力が安定支持限界性能に達すると安定支持限界信号を出力する安定支持限界監視制御手段とを備えたトラック搭載型クレーンの安全装置において、ブーム長さ検出手段とブーム角度検出手段とからの検出値に基づいてトラックの荷台に荷物を積載しない状態でのクレーン作業時の安定度から決定される空車時安定限界性能を予め記憶しておき当該空車時安定限界性能と負荷検出手段で検出される実際負荷とを比較し実際負荷が空車時安定限界性能に達すると空車時安定限界信号を出力する空車時安定限界監視制御手段と、前記支持力検出手段で検出される実際支持力が正常に検出されているか否かを判別する支持力検出故障判別手段と、前記支持力検出故障判別手段が故障と判別すると前記空車時安定限界監視制御手段の空車時安定限界信号の出力を許容し、前記支持力検出故障判別手段が正常と判別すると前記空車時安定限界監視制御手段の空車時安定限界信号の出力を規制する第1規制手段と、前記支持力検出故障判別手段が故障と判別すると前記安定支持限界監視制御手段の安定支持限界信号の出力を規制し、前記支持力検出故障判別手段が正常と判別すると安定支持限界信号の出力を許容する第2規制手段とを配置ことを特徴とするものである。
請求項2記載のトラック搭載型クレーンの安全装置は、請求項1において、前記負荷限界信号、前記安定支持限界信号、前記空車時安定信号の各信号を入力し当該各信号の何れかの信号を受けるとクレーンの作動を停止させる作動停止手段あるいは警報する警報手段を備えたことを特徴とするものである。
In order to achieve the above object, a truck mounted crane safety device according to claim 1 of the present invention is a truck mounted crane mounted on a truck having a loading platform, and detects a boom length. Length detection means, boom angle detection means for detecting the boom angle, load detection means for detecting a load acting on the boom due to the suspended load, support force detection means for detecting the support force of the outrigger, and boom length detection Load limit performance determined from the strength of the crane based on the detection values from the means and the boom angle detection means is stored in advance, and the load limit performance is compared with the actual load detected by the load detection means. The load limit monitoring control means for outputting a load limit signal when the load reaches the load limit performance, the actual support force detected by the support force detection means and the pre-stored fall prevention In a safety device for a truck-mounted crane equipped with a stable support limit monitoring and control means for outputting a stable support limit signal when the actual support force reaches the stable support limit performance, Based on the detection values from the detection means and the boom angle detection means, an empty-time stability limit performance determined from the stability at the time of crane work when no load is loaded on the truck bed is stored in advance. A stability limit monitoring control unit for an empty time that compares the stability limit performance with an actual load detected by the load detection means and outputs an empty time stability limit signal when the actual load reaches an empty time stability limit performance; and the supporting force detection means And a support force detection failure determination means for determining whether or not the actual support force detected in the above is normally detected, and when the support force detection failure determination means determines that there is a failure, A first limit that permits the output of the stability limit signal for the empty time of the constant limit monitoring and control means and restricts the output of the stability limit signal for the empty time of the empty time stability limit monitoring and control means when the support force detection failure determination means determines normal. When the regulating means and the supporting force detection failure determining means determine that there is a failure, the output of the stable supporting limit signal of the stable support limit monitoring control means is regulated, and when the supporting force detection failure determining means determines that it is normal, the stable support limit signal And a second restricting means that permits the output of.
The safety device for a truck-mounted crane according to claim 2 is the safety device for a truck-mounted crane according to claim 1, wherein the load limit signal, the stable support limit signal, and the empty time stability signal are input and any one of the signals is output. When received, it is provided with an operation stop means for stopping the operation of the crane or an alarm means for alarming.

請求項1に係る本発明のトラック搭載型クレーンの安全装置は、従来から備えているブーム長さ検出手段とブーム角度検出手段とからの検出値に基づいてクレーンの強度から決定される負荷限界性能を予め記憶しておき当該負荷限界性能と負荷検出手段で検出される実際負荷とを比較し実際負荷が負荷限界性能に達すると負荷限界信号を出力する負荷限界監視制御手段と、支持力検出手段により検出される実際支持力と予め記憶している転倒防止のための安定支持限界性能とを比較して実際支持力が安定支持限界性能に達すると安定支持限界信号を出力する安定支持限界監視制御手段の他に、
ブーム長さ検出手段とブーム角度検出手段とからの検出値に基づいてトラックの荷台に荷物を積載しない状態でのクレーン作業時の安定度から決定される空車時安定限界性能を予め記憶しておき当該空車時安定限界性能と負荷検出手段で検出される実際負荷とを比較し実際負荷が空車時安定限界性能に達すると空車時安定限界信号を出力する空車時安定限界監視制御手段を備え、
前記支持力検出手段で検出される実際支持力が正常に検出されているか否かを判別する支持力検出故障判別手段と、前記支持力検出故障判別手段が故障と判別すると前記空車時安定限界監視制御手段の空車時安定限界信号の出力を許容し、前記支持力検出故障判別手段が正常と判別すると前記空車時安定限界監視制御手段の空車時安定限界信号の出力を規制する第1規制手段と、前記支持力検出故障判別手段が故障と判別すると前記安定支持限界監視制御手段の安定支持限界信号の出力を規制し、前記支持力検出故障判別手段が正常と判別すると安定支持限界信号の出力を許容する第2規制手段とを配置したものであるから、
支持力検出手段が正常の場合には、支持力検出故障判別手段が支持力検出手段で検出される実際支持力が正常に検出されていると判別して、前記第1規制手段により前記空車時安定限界監視制御手段の空車時安定限界信号の出力を規制するとともに、第2規制手段により前記安定支持限界監視制御手段の安定支持限界信号の出力を許容すると共に、
支持力検出手段が故障の場合には、支持力検出故障判別手段が支持力検出手段で検出される実際支持力が正常に検出されていないと判別して、前記第1規制手段により前記空車時安定限界監視制御手段の空車時安定限界信号の出力を許容するとともに、第2規制手段により前記安定支持限界監視制御手段の安定支持限界信号の出力を規制するのである。
The safety device for a truck-mounted crane according to the first aspect of the present invention is a load limit performance determined from the strength of the crane based on the detection values from the boom length detection means and the boom angle detection means that are conventionally provided. Is stored in advance, the load limit performance is compared with the actual load detected by the load detection means, and when the actual load reaches the load limit performance, a load limit monitoring control means for outputting a load limit signal, and a supporting force detection means Stable support limit monitoring control that outputs a stable support limit signal when the actual support force reaches the stable support limit performance by comparing the actual support force detected by the vehicle with the pre-stored stable support limit performance for preventing overturning Besides means,
Based on the detection values from the boom length detection means and the boom angle detection means, the empty vehicle stability limit performance determined from the stability during crane operation in a state where no load is loaded on the truck bed is stored in advance. Comparing the empty time stability limit performance with the actual load detected by the load detection means, and equipped with an empty time stability limit monitoring control means for outputting an empty time stability limit signal when the actual load reaches the empty time stability limit performance,
Support force detection failure determination means for determining whether or not the actual support force detected by the support force detection means is normally detected; and if the support force detection failure determination means determines that a failure has occurred, the empty vehicle stability limit monitoring First regulation means for permitting output of an empty time stability limit signal of the control means and restricting output of an empty time stability limit signal of the empty time stability limit monitoring control means when the supporting force detection failure determination means determines normal; When the supporting force detection failure determining means determines that there is a failure, the stable support limit monitoring control means outputs the stable support limit signal, and when the supporting force detection failure determining means determines that it is normal, the stable support limit signal output is output. Since the second restricting means to be allowed is arranged,
When the support force detection means is normal, the support force detection failure determination means determines that the actual support force detected by the support force detection means is normally detected, and the first restriction means determines that the While restricting the output of the stability limit signal during emptying of the stability limit monitoring control means, allowing the output of the stable support limit signal of the stable support limit monitoring control means by the second restriction means,
When the supporting force detecting means is out of order, the supporting force detecting failure determining means determines that the actual supporting force detected by the supporting force detecting means is not normally detected, and the first restricting means determines that the The output of the stability limit signal at the time of the empty limit of the stability limit monitoring control means is permitted, and the output of the stable support limit signal of the stable support limit monitoring control means is restricted by the second restriction means.

すなわち、支持力検出手段が正常の場合には、従来通りの負荷限界監視制御手段と安定支持限界監視制御手段とにより監視制御するものである。一方、支持力検出手段が故障の場合には、負荷限界監視制御手段と空車時安定限界監視制御手段とにより監視制御することにより、支持力検出手段による支持力を検出しないで監視制御できるようにしたもので、アウトリガ(ジャッキ)による安定限界の監視ができなくなり危険なクレーン作業となってしまうことがない安全なクレーン作業を可能にするトラック搭載型クレーンの安全装置を提供することができる。   In other words, when the supporting force detection means is normal, the conventional load limit monitoring control means and the stable support limit monitoring control means perform monitoring control. On the other hand, when the support force detecting means is out of order, the control can be performed without detecting the support force by the support force detecting means by performing the monitoring control with the load limit monitoring control means and the empty time stability limit monitor control means. Thus, it is possible to provide a safety device for a truck-mounted crane that enables safe crane work that does not become a dangerous crane work because the stability limit cannot be monitored by an outrigger (jack).

請求項2に係る本発明のトラック搭載型クレーンの安全装置は、請求項1において、前記負荷限界信号、前記安定支持限界信号、前記空車時安定信号の各信号を入力し当該各信号の何れかの信号を受けるとクレーンの作動を停止させる作動停止手段あるいは警報する警報手段を備えたものであるから、支持力検出手段が故障していない場合には、ブームに作用する負荷が負荷限界に達した時あるいは、アウトリガの支持力が安定支持限界に達した時に、作動停止手段でクレーンの作動を停止あるいは警報手段で警報することができる。
一方、支持力検出手段が故障している場合には、ブームに作用する負荷が負荷限界に達した時あるいは、ブームに作用する負荷が空車時安定限界に達した時に、作動停止手段でクレーンの作動を停止あるいは警報手段で警報することができる。
A truck mounted crane safety device according to a second aspect of the present invention is the truck mounted crane safety device according to the first aspect, wherein the load limit signal, the stable support limit signal, and the empty time stability signal are input and any one of the signals is input. When there is no failure, the load acting on the boom reaches the load limit when the support force detection means is not faulty. When the support force of the outrigger reaches the stable support limit, the operation of the crane can be stopped by the operation stop means or an alarm means can be warned.
On the other hand, when the supporting force detecting means is out of order, when the load acting on the boom reaches the load limit or when the load acting on the boom reaches the empty stability limit, The operation can be stopped or alarmed by an alarm means.

以下本発明に係る本発明のトラック搭載型クレーンの安全装置の実施形態について、図1〜図3に図示し以下に説明する。本発明に係るトラック搭載型クレーンBは、図2に示す如く、左右端部に開口部を有する案内筒2,2を備えた基台1であって案内筒2,2がトラックAの運転室A1と荷台A2間のシャーシフレームA3上に横架状態となるようにして取付けられた基台1、前記案内筒2,2の左右の開口部にそれぞれ伸縮自在に嵌挿された左右一対のアウトリガビーム3,3、各アウトリガビーム3,3の外端部にそれぞれ垂設されたジャッキ4,4、前記基台1に旋回駆動自在に取付けた旋回ポスト5、旋回ポスト5に起伏自在に取付けられブーム起伏シリンダ6aにより起伏駆動される伸縮ブーム6、および前記旋回ポスト5または伸縮ブーム6基端部に取付けたウインチ7とを備え、伸縮ブーム6の先端部に配置したブーム先端滑車6bを経由して引き出された前記ウインチ7からのワイヤロープ8で吊具9を吊下するよう構成している。   Embodiments of the safety device for a truck-mounted crane according to the present invention will be described below with reference to FIGS. As shown in FIG. 2, a truck-mounted crane B according to the present invention is a base 1 having guide cylinders 2 and 2 having openings at left and right ends, and the guide cylinders 2 and 2 are cabs of the truck A. A pair of left and right outriggers that are telescopically fitted into the left and right openings of the base 1 and the guide cylinders 2 and 2 mounted on the chassis frame A3 between the A1 and the loading platform A2 so as to be placed horizontally. Beams 3, 3, jacks 4, 4 suspended from the outer ends of the outrigger beams 3, 3, a swivel post 5 that is pivotably mounted on the base 1, and a swingable post 5. A telescopic boom 6 driven up and down by a boom hoisting cylinder 6a and a winch 7 attached to the pivot post 5 or the base end of the telescopic boom 6 are provided, and a boom tip pulley 6b disposed at the distal end of the telescopic boom 6 is provided. The It is configured to suspended the hanger 9 wire rope 8 from the winch 7 issued come.

そして、この種のトラック搭載型クレーンBでクレーン作業をする場合には、先ずアウトリガビーム3,3を適宜伸長させると共にジャッキ4,4を伸ばしてトラックAの前方(運転室A1側)を持ち上げてトラックAを安定させる。そして、旋回ポスト5を旋回駆動、伸縮ブーム6を起伏並びに伸縮駆動、およびウインチ7により吊具9を巻き上げ巻き下げ駆動し、吊具9に吊下した吊荷を任意の位置へ移動させるのである。   When crane work is performed with this type of truck-mounted crane B, the outrigger beams 3 and 3 are first extended as appropriate and the jacks 4 and 4 are extended to lift the front of the truck A (operating room A1 side). Stabilize track A. Then, the swiveling post 5 is swiveled, the telescopic boom 6 is raised and lowered, and the hoisting tool 9 is wound up and down by the winch 7, and the suspended load suspended from the hoisting tool 9 is moved to an arbitrary position. .

トラック搭載型クレーンBにはクレーン作業の安全を確保するために図1に示す如くのトラック搭載型クレーンの安全装置を備えている。まず、トラック搭載型クレーンBに、ブーム長さを検出するブーム長さ検出手段10と、ブーム角度を検出するブーム角度検出手段11と、吊荷によりブーム6に作用する負荷を検出する負荷検出手段12と、アウトリガ(ジャッキ4、4)の支持力を検出する支持力検出手段13、13の各検出手段を配置している。   The truck-mounted crane B is provided with a truck-mounted crane safety device as shown in FIG. 1 in order to ensure the safety of crane work. First, a boom length detecting means 10 for detecting a boom length, a boom angle detecting means 11 for detecting a boom angle, and a load detecting means for detecting a load acting on the boom 6 due to a suspended load. 12 and support force detection means 13 and 13 for detecting the support force of the outriggers (jacks 4 and 4).

そしてブーム長さ検出手段10とブーム角度検出手段11とからの検出値に基づいてクレーンの構造上強度から決定される負荷限界性能を予め記憶させた負荷限界性能記憶器14aと、クレーンの作業姿勢であるブーム長さとブーム起伏角をブーム長さ検出手段10とブーム角度検出手段11で検出した検出値に基づいて負荷限界性能記憶器14aから出力されるその時の負荷限界性能と前記負荷検出手段12で検出された実際負荷とを比較し実際負荷が負荷限界性能に達すると負荷限界信号14cを出力するする負荷限界比較器14bとで構成される負荷限界監視制御手段14を備えている。   Then, a load limit performance storage device 14a that stores in advance the load limit performance determined from the structural strength of the crane based on the detection values from the boom length detection means 10 and the boom angle detection means 11, and the working posture of the crane The load limit performance at that time output from the load limit performance memory 14a based on the detected values detected by the boom length detection means 10 and the boom angle detection means 11, and the load detection means 12 And a load limit monitoring control means 14 comprising a load limit comparator 14b for outputting a load limit signal 14c when the actual load reaches the load limit performance.

また、前記支持力検出手段13、13により検出される実際支持力が所定値以下となりトラックが転倒するのを防止する安定支持限界性能を予め記憶している安定支持限界性能記憶器15aと、前記支持力検出手段13、13により検出される実際支持力と安定支持限界性能記憶器15aに記憶されている前記安定支持限界性能とを比較して実際支持力が安定支持限界性能に達すると安定支持限界信号15cを出力する安定支持限界比較器15bとで構成される安定支持限界監視制御手段15を備えている。   Further, a stable support limit performance storage 15a that stores in advance a stable support limit performance that prevents the actual support force detected by the support force detection means 13 and 13 from falling below a predetermined value to prevent the track from falling over; The actual support force detected by the support force detecting means 13, 13 is compared with the stable support limit performance stored in the stable support limit performance memory 15a, and when the actual support force reaches the stable support limit performance, the stable support is achieved. Stable support limit monitoring control means 15 comprising a stable support limit comparator 15b that outputs a limit signal 15c is provided.

更に、ブーム長さ検出手段10とブーム角度検出手段11とからの検出値に基づいてトラックAの荷台A2に荷物を積載しない状態でのクレーン作業時の安定度から決定される空車時安定限界性能を予め記憶させた空車時安定限界性能記憶手段16aと、クレーンの作業姿勢であるブーム長さとブーム起伏角をブーム長さ検出手段10とブーム角度検出手段11で検出した検出値に基づいて空車時安定限界性能記憶手段16aから出力されるその時の空車時安定限界性能と前記負荷検出手段12で検出された実際負荷とを比較し実際負荷が空車時安定限界性能に達すると空車時安定限界信号16cを出力する空車時安定限界比較器16bとで構成される空車時安定限界監視制御手段16を備えている。   Further, based on the detection values from the boom length detection means 10 and the boom angle detection means 11, the empty vehicle stability limit performance is determined from the stability during crane operation when no load is loaded on the loading platform A2 of the truck A. Is stored in advance based on the detected values detected by the boom length detecting means 10 and the boom angle detecting means 11 for the boom length and the boom undulation angle which are the working posture of the crane. The empty space stability limit performance output from the stability limit performance storage means 16a is compared with the actual load detected by the load detection means 12, and when the actual load reaches the empty stability limit performance, the empty time stability limit signal 16c. Is provided with an empty time stability limit monitoring control means 16 constituted by an empty time stability limit comparator 16b.

ここで、空車時安定限界監視制御手段16で監視される空車時安定限界性能は、前記安定支持限界監視制御手段15で監視される安定支持限界性能に比較してクレーン作業の可能範囲の狭い性能であり、通常は使用されない。すなわち、前記支持力検出手段13、13が故障した際に、実際支持力による前記安定支持限界監視制御手段15での監視制御ができないので、クレーン作業の可能範囲の狭い性能であるが実際支持力を検出しなくても監視制御可能な空車時安定限界監視制御手段16を作動させるようにしている。   Here, the stability limit performance at the time of empty space monitored by the stability limit monitoring control means 16 at the time of the empty space is a performance having a narrower possible range of crane work than the performance of the stable support limit monitored by the stable support limit monitoring control means 15. And is not normally used. That is, when the support force detection means 13, 13 fails, monitoring control by the stable support limit monitoring control means 15 based on the actual support force cannot be performed. The empty vehicle stability limit monitoring control means 16 that can be monitored and controlled without detecting this is activated.

このようにするために、前記支持力検出手段13、13で検出される実際支持力が正常に検出されているか否かを判別する支持力検出故障判別手段17を配置し、当該支持力検出故障判別手段17が故障と判別すると前記空車時安定限界監視制御手段16の空車時安定限界信号16cの出力を許容し、支持力検出故障判別手段17が正常と判別すると前記空車時安定限界監視制御手段16の空車時安定限界信号16cの出力を規制する第1規制手段18と、支持力検出故障判別手段17が故障と判別すると前記安定支持限界監視制御手段15の安定支持限界信号15cの出力を規制し、支持力検出故障判別手段17が正常と判別すると安定支持限界信号15cの出力を許容する第2規制手段19を配置している。   In order to do this, a supporting force detection failure determining means 17 for determining whether or not the actual supporting force detected by the supporting force detection means 13 and 13 is normally detected is disposed, and the supporting force detection failure is detected. When the discriminating means 17 discriminates a failure, the output of the empty-time stability limit monitoring and control means 16 allows the output of the empty-time stability limit signal 16c. The output of the stable support limit signal 15c of the stable support limit monitoring control means 15 is restricted when the first restricting means 18 for restricting the output of the 16 empty-space stability limit signal 16c and the support force detection failure determining means 17 determine that the failure has occurred. When the support force detection failure determination means 17 determines that it is normal, a second restriction means 19 that allows the output of the stable support limit signal 15c is disposed.

このように本願発明のトラック搭載型クレーンの安全装置は、第1規制手段18と第2規制手段19を配置することで、前記支持力検出手段13、13が正常の場合には、従来通りの負荷限界監視制御手段14と安定支持限界監視制御手段15とにより監視制御させるようにしたものである。一方、支持力検出手段13、13が故障の場合には、負荷限界監視制御手段14と空車時安定限界監視制御手段16とにより監視制御させるようにしたもので、支持力検出手段13、13による支持力を検出しないで監視制御するようにしたものであるから、アウトリガ(ジャッキ)による安定限界の監視ができなくなり危険なクレーン作業となるのを防止できる。   As described above, the safety device for the truck-mounted crane according to the present invention arranges the first restricting means 18 and the second restricting means 19 so that when the support force detecting means 13 and 13 are normal, The load limit monitoring control means 14 and the stable support limit monitoring control means 15 are used for monitoring control. On the other hand, when the supporting force detection means 13 and 13 are out of order, the load limit monitoring control means 14 and the empty vehicle stability limit monitoring control means 16 are monitored and controlled by the supporting force detection means 13 and 13. Since the monitoring control is performed without detecting the supporting force, it is possible to prevent a dangerous crane operation from being performed because the stability limit cannot be monitored by the outrigger (jack).

なお、前記支持力検出故障判別手段17は、アウトリガ(ジャッキ)の支持力を検出する前記支持力検出手段13、13による検出値が、当該支持力検出手段13、13が正常な場合に検出される検出値の範囲以外の値であると故障として判断するようにしている。   The support force detection failure determination means 17 detects the detected value by the support force detection means 13, 13 for detecting the support force of the outrigger (jack) when the support force detection means 13, 13 is normal. It is determined as a failure that the value is outside the range of detected values.

前記負荷限界監視制御手段14から出力される前記負荷限界信号14cと、安定支持限界監視制御手段15から出力される前記安定支持限界信号15cと、空車時安定限界監視制御手段16から出力される前記空車時安定限界信号16cの各信号を入力し当該各信号の何れかの信号を受けるとクレーンの作動を停止させる作動停止手段20を配置している。 Said load limit signal 14c outputted from the load limit supervisory control means 14, the a stable support limit signal 15c outputted from the stable support limit supervisory control means 15, the output from the bare stability limit supervisory control means 16 An operation stopping means 20 is provided for stopping the operation of the crane when each signal of the empty vehicle stability limit signal 16c is inputted and any one of the signals is received.

前記作動停止手段20は、その作動時に伸縮ブーム6の伸長並びに倒伏、ウインチ7の巻き上げ、および旋回ポスト5の旋回の各駆動を指示する操作信号の伝達を遮断するよう車輌搭載型クレーンBの操作信号伝達経路に介装した操作信号遮断手段で構成している。また、作動停止手段20に替えて警報手段21を配置しブザーあるいは警告灯で警報させるようにしてもよい。更に、作動停止手段20と警報手段21の両方を配置させてもよい。   The operation stopping means 20 operates the vehicle-mounted crane B so as to cut off the transmission of operation signals instructing driving of the extension and fall of the telescopic boom 6, the winding of the winch 7, and the turning of the turning post 5 during the operation. The operation signal blocking means is provided in the signal transmission path. Further, an alarm means 21 may be arranged in place of the operation stopping means 20 and an alarm may be given by a buzzer or a warning light. Furthermore, you may arrange | position both the operation stop means 20 and the alarm means 21. FIG.

このように本発明に係る本発明のトラック搭載型クレーンの安全装置は、次のように作用する。すなわち、支持力検出手段13、13が正常の場合には、支持力検出故障判別手段17が第1規制手段18と第2規制手段19を作用させて、空車時安定限界監視制御手段16を規制状態にし、安定支持限界監視制御手段15を許容状態にするものであるから、従来通りの負荷限界監視制御手段14と安定支持限界監視制御手段15とにより監視制御する。   Thus, the truck-mounted crane safety device of the present invention according to the present invention operates as follows. That is, when the support force detection means 13 and 13 are normal, the support force detection failure determination means 17 causes the first restricting means 18 and the second restricting means 19 to act, thereby regulating the empty time stability limit monitoring control means 16. Since the stable support limit monitoring control means 15 is set to the allowable state, monitoring control is performed by the conventional load limit monitoring control means 14 and the stable support limit monitoring control means 15.

一方、支持力検出手段13、13が故障の場合には、支持力検出故障判別手段17が第1規制手段18と第2規制手段19を作用させて、空車時安定限界監視制御手段16を許容状態にし、安定支持限界監視制御手段15を規制状態にするものであるから、負荷限界監視制御手段14と空車時安定限界監視制御手段16とにより監視制御する。よって、支持力検出手段13、13による支持力を検出しないで監視制御できるようにしたもので、アウトリガ(ジャッキ)による安定限界の監視ができなくても危険なクレーン作業となってしまうことがなく、安全なクレーン作業を可能にすることができる。   On the other hand, when the supporting force detecting means 13 and 13 are out of order, the supporting force detecting failure determining means 17 operates the first restricting means 18 and the second restricting means 19 to permit the empty time stability limit monitoring control means 16. Since the stable support limit monitoring control means 15 is set to the restricted state, the load limit monitoring control means 14 and the empty-time stable limit monitoring control means 16 perform monitoring control. Therefore, it is possible to monitor and control without detecting the supporting force by the supporting force detecting means 13 and 13, and even if the stability limit cannot be monitored by the outrigger (jack), it will not be a dangerous crane work. , Can enable safe crane work.

なお、上記実施形態では、空車時安定限界性能記憶器16aは、伸縮ブーム6の作業姿勢としてブーム長さ検出手段10とブーム角度検出手段11との検出値に基づいて空車時安定限界性能を記憶させたものであるが、図3に図示するように伸縮ブーム6の旋回角を検出する旋回角検出手段21を設け、ブーム長さ検出手段10、ブーム角度検出手段11、旋回角検出手段21の3つの検出値に基づいて空車時安定限界性能を空車時安定限界性能記憶器16dに記憶させるようにしたものであってもよい。このような空車時安定限界性能を用いることでより正確な空車時安定限界性能とすることができる。   In the above embodiment, the empty vehicle stability limit performance storage 16 a stores the empty vehicle stability limit performance based on the detection values of the boom length detection means 10 and the boom angle detection means 11 as the working posture of the telescopic boom 6. As shown in FIG. 3, the turning angle detecting means 21 for detecting the turning angle of the telescopic boom 6 is provided, and the boom length detecting means 10, the boom angle detecting means 11, and the turning angle detecting means 21 are provided. An empty vehicle stability limit performance may be stored in the empty vehicle stability limit performance storage 16d based on the three detection values. By using such an empty time stability limit performance, a more accurate empty time stability limit performance can be obtained.

次に、上記実施形態では、伸縮ブーム6に作用する負荷を検出する負荷検出手段12で検出するようにしたが吊荷荷重を検出するようにし、負荷限界性能記憶器14aおよび空車時安定限界性能記憶器16aに記憶される性能も荷重に基づくもので行うようにしてもよい。また、負荷限界性能記憶器14aおよび空車時安定限界性能記憶器16aに記憶される性能は、ブーム長さ検出手段10とブーム角度検出手段11で検出される検出値から作業半径を求め、当該作業半径に基づいて性能を記憶させるようにしたものであってもよい。   Next, in the above embodiment, the load detecting means 12 that detects the load acting on the telescopic boom 6 is detected, but the suspended load is detected, and the load limit performance memory 14a and the empty vehicle stability limit performance are detected. The performance stored in the storage device 16a may be based on the load. The performance stored in the load limit performance storage device 14a and the empty vehicle stability limit performance storage device 16a is obtained by obtaining a work radius from detection values detected by the boom length detection means 10 and the boom angle detection means 11, and The performance may be stored based on the radius.

本発明に係るトラック搭載型クレーンの安全装置を説明する説明図である。It is explanatory drawing explaining the safety device of the truck mounted crane which concerns on this invention. 本発明に係るトラック搭載型クレーンを説明図である。It is explanatory drawing about the truck-mounted crane which concerns on this invention. 本発明に係るトラック搭載型クレーンの安全装置の他の実施形態を説明する説明図である。It is explanatory drawing explaining other embodiment of the safety device of the truck mounted crane which concerns on this invention.

符号の説明Explanation of symbols

10 ブーム長さ検出手段
11 ブーム角度検出手段
12 負荷検出手段
13 支持力検出手段
14 負荷限界監視制御手段
15 安定支持限界監視制御手段
16 空車時安定限界監視制御手段
17 支持力検出故障判別手段
18 第1規制手段
19 第2規制手段
20 作動停止手段
B トラック搭載型クレーン
DESCRIPTION OF SYMBOLS 10 Boom length detection means 11 Boom angle detection means 12 Load detection means 13 Support force detection means 14 Load limit monitoring control means 15 Stable support limit monitoring control means 16 Empty vehicle stability limit monitoring control means 17 Support force detection failure determination means 18 1 restricting means 19 second restricting means 20 operation stopping means B truck mounted crane

Claims (2)

荷台を備えたトラックに搭載されるトラック搭載型クレーンであって、
ブーム長さを検出するブーム長さ検出手段と、ブーム角度を検出するブーム角度検出手段と、吊荷によりブームに作用する負荷を検出する負荷検出手段と、アウトリガの支持力を検出する支持力検出手段と、
ブーム長さ検出手段とブーム角度検出手段とからの検出値に基づいてクレーンの強度から決定される負荷限界性能を予め記憶しておき当該負荷限界性能と負荷検出手段で検出される実際負荷とを比較し実際負荷が負荷限界性能に達すると負荷限界信号を出力する負荷限界監視制御手段と、
支持力検出手段により検出される実際支持力と予め記憶している転倒防止のための安定支持限界性能とを比較して実際支持力が安定支持限界性能に達すると安定支持限界信号を出力する安定支持限界監視制御手段とを備えたトラック搭載型クレーンの安全装置において、
ブーム長さ検出手段とブーム角度検出手段とからの検出値に基づいてトラックの荷台に荷物を積載しない状態でのクレーン作業時の安定度から決定される空車時安定限界性能を予め記憶しておき当該空車時安定限界性能と負荷検出手段で検出される実際負荷とを比較し実際負荷が空車時安定限界性能に達すると空車時安定限界信号を出力する空車時安定限界監視制御手段と、
前記支持力検出手段で検出される実際支持力が正常に検出されているか否かを判断する支持力検出故障判別手段と、
前記支持力検出故障判別手段が故障と判別すると前記空車時安定限界監視制御手段の空車時安定限界信号の出力を許容し、前記支持力検出故障判別手段が正常と判別すると前記空車時安定限界監視制御手段の空車時安定限界信号の出力を規制する第1規制手段と、
前記支持力検出故障判別手段が故障と判別すると前記安定支持限界監視制御手段の安定支持限界信号の出力を規制し、前記支持力検出故障判別手段が正常と判別すると安定支持限界信号の出力を許容する第2規制手段とを配置したことを特徴とするトラック搭載型クレーンの安全装置。
A truck-mounted crane mounted on a truck with a loading platform,
Boom length detection means for detecting the boom length, boom angle detection means for detecting the boom angle, load detection means for detecting a load acting on the boom due to the suspended load, and support force detection for detecting the support force of the outrigger Means,
The load limit performance determined from the strength of the crane based on the detection values from the boom length detection means and the boom angle detection means is stored in advance, and the load limit performance and the actual load detected by the load detection means are stored. Load limit monitoring and control means for outputting a load limit signal when the actual load reaches the load limit performance in comparison,
Compares the actual support force detected by the support force detection means with the previously stored stable support limit performance for preventing overturning, and outputs a stable support limit signal when the actual support force reaches the stable support limit performance. In a safety device for a truck-mounted crane equipped with a support limit monitoring control means,
Based on the detection values from the boom length detection means and the boom angle detection means, the empty vehicle stability limit performance determined from the stability during crane operation in a state where no load is loaded on the truck bed is stored in advance. The empty time stability limit performance is compared with the actual load detected by the load detecting means, and when the actual load reaches the empty time stability limit performance, an empty time stability limit monitoring control means, which outputs an empty time stability limit signal,
Support force detection failure determination means for determining whether or not the actual support force detected by the support force detection means is normally detected;
When the supporting force detection failure determining means determines that there is a failure, the empty time stability limit monitoring control means allows the output of an empty vehicle stability limit signal, and when the supporting force detection failure determining means determines that it is normal, the empty time stability limit monitoring is determined. A first restricting means for restricting the output of an empty vehicle stability limit signal of the control means;
If the supporting force detection failure determining means determines that there is a failure, the output of the stable support limit signal of the stable support limit monitoring control means is restricted, and if the supporting force detection failure determining means is determined to be normal, the output of the stable support limit signal is allowed. A safety device for a truck-mounted crane, characterized in that a second regulating means is arranged.
請求項1において、前記負荷限界信号、前記安定支持限界信号、前記空車時安定限界信号の各信号を入力し当該各信号の何れかの信号を受けるとクレーンの作動を停止させる作動停止手段あるいは警報する警報手段を備えたことを特徴とするトラック搭載型クレーンの安全装置。 2. The operation stop means or alarm for stopping the operation of the crane according to claim 1, wherein each of the load limit signal, the stable support limit signal, and the empty time stability limit signal is input and any one of the signals is received. A safety device for a truck-mounted crane, characterized by comprising an alarm means for performing the operation.
JP2007304335A 2007-11-26 2007-11-26 Safety equipment for truck mounted cranes Active JP5255822B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007304335A JP5255822B2 (en) 2007-11-26 2007-11-26 Safety equipment for truck mounted cranes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007304335A JP5255822B2 (en) 2007-11-26 2007-11-26 Safety equipment for truck mounted cranes

Publications (2)

Publication Number Publication Date
JP2009126652A JP2009126652A (en) 2009-06-11
JP5255822B2 true JP5255822B2 (en) 2013-08-07

Family

ID=40817958

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007304335A Active JP5255822B2 (en) 2007-11-26 2007-11-26 Safety equipment for truck mounted cranes

Country Status (1)

Country Link
JP (1) JP5255822B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102367160B (en) * 2011-09-15 2015-08-05 济南富友慧明监控设备有限公司 A kind of method and device thereof judging tower machine Condition of Sudden Unloading

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4194820B2 (en) * 2002-09-26 2008-12-10 古河機械金属株式会社 Safety device for on-board crane
JP2006160502A (en) * 2004-12-10 2006-06-22 Aichi Corp Safety control device of work vehicle

Also Published As

Publication number Publication date
JP2009126652A (en) 2009-06-11

Similar Documents

Publication Publication Date Title
WO2018074532A1 (en) Crane vehicle
CN108883919B (en) Crane with a movable crane
JP5616658B2 (en) Boom working machine
WO2017090688A1 (en) Device for verifying state of assembly of luffing jib
JP2011037565A (en) Crane overturn prevention device
JP5255822B2 (en) Safety equipment for truck mounted cranes
JP2008105817A (en) Fall-down preventive device for on-vehicle crane
JP2018083713A (en) Irregular winding preventing device for winch and crane
JP5169087B2 (en) Mobile crane safety device
JP4788490B2 (en) Elevating mechanism of hoisting members
JP4874563B2 (en) Outrigger safety device
JP2007204236A (en) Safety device of walking crane
JPH0873189A (en) Safety device for truck mounting crane
JPH08268685A (en) Simulation operating device for crane
JPH08268694A (en) Safety device for outrigger
JP5028880B2 (en) Crane overload prevention device
JP2873498B2 (en) Boom-type work vehicle safety device
JP6550328B2 (en) crane
JP2018095448A (en) Use hook determination device
JP7151908B2 (en) overload protector
JP2528907Y2 (en) Detector abnormality detector used for work equipment
JP2012250820A (en) Safety control device related to jib attitude in crane with jib
JP3318130B2 (en) Overload status recording device for mobile crane
JP3735478B2 (en) Safety equipment for aerial work platforms
KR102397453B1 (en) Overturn Protection System of Special Truck

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20101118

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20120727

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20130129

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20130225

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20130409

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20130422

R150 Certificate of patent or registration of utility model

Ref document number: 5255822

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20160426

Year of fee payment: 3

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250