CN101407307A - Anti-loosening method and device for lifting chain and stacking machine using device - Google Patents
Anti-loosening method and device for lifting chain and stacking machine using device Download PDFInfo
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- CN101407307A CN101407307A CNA2008101784129A CN200810178412A CN101407307A CN 101407307 A CN101407307 A CN 101407307A CN A2008101784129 A CNA2008101784129 A CN A2008101784129A CN 200810178412 A CN200810178412 A CN 200810178412A CN 101407307 A CN101407307 A CN 101407307A
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Abstract
The invention discloses a locking method for a lifting chain, which comprises the following steps: detecting the stress condition of each lifting chain in real time, and acquiring the stress value to be compared of each lifting chain; comparing the stress value to be compared of each lifting chain with a preset stress threshold value of the lifting chain to obtain a first comparison result; calculating the difference value between the stress values to be compared of each lifting chain, and comparing the difference value between the stress values to be compared of each lifting chain with a preset stress difference threshold value of each lifting chain to obtain a second comparison result; when the first comparison result represents that a to-be-compared stress value of a lifting chain is smaller than or equal to a preset lifting chain stress threshold value, or the second comparison result represents that a difference value between the to-be-compared stress values of the lifting chain is larger than or equal to a preset lifting chain stress difference threshold value, an alarm control signal is sent; and sending out an alarm signal according to the alarm control signal. By monitoring the stress of the chain, the alarm can be given when the elevating system of the fork lift is abnormal in operation. The invention also provides a corresponding anti-loosening device for the lifting chain and a stacking machine using the device.
Description
Technical field
The present invention relates to the bunching device field, is a kind of elevating chain anti-loose method, device and the Forklift that uses this device specifically.
Background technology
Freight container Forklift (hereinafter to be referred as Forklift) is a kind of carrying and bunching device of freight container, belongs to the walking weight-lifting equipment on certain meaning.Because of Forklift is high lifting operation, its operational security requires very high.But existing Forklift jacking system adopts lift chains mechanism, and its safe in operation relies on physical construction to guarantee, is difficult to bring into play forewarning function when operation exception, further specifies below.
Forklift jacking system shown in Figure 1A, Figure 1B comprises: door frame 6, by roller 8 up-and-down movements; Oil cylinder 7 provides the lifting power of Forklift; Suspender 9 is positioned at door frame 6; Two chains 1, separately with door frame 6 on sprocket engagement, the end of each chain 1 connects suspender 9.In this structure, Forklift lifting power is oil cylinder 7, but directly application mechanism is a chain 1; Because the motion of chain 1 directly drives the operation of suspender 9, therefore, the situation quality of chain 1 will directly influence the safety of Forklift operation.In fact, there is multiple uncontrollable factor in the Forklift operational process, is mainly two big classes:
The one, suspender or door frame operation are stuck.As: between the raceway of door frame roller, fall into foreign matter, make roller stuck in raceway, cause suspender to move; Because of maloperation, door frame collision back distortion causes the suspender operation stuck; Local deformation after the door frame long-term use causes the suspender operation stuck; In time do not change behind the slide block undue wear between door frame, cause the interference of assembly parts and door frame after rocking; Or the like.Oil cylinder upward movement by force taking place under the stuck situation of suspender or door frame operation: if will damage chain and door frame; If this moment, oil cylinder was done descending motion, suspender or door frame will get loose suddenly, thereby produce impact and break chain and cause the accident.
The 2nd, chain unbalance loading or strand bar are stressed.For example: after the client changed chain voluntarily, the elasticity of each chain was improper, differ greatly, and caused that thus chain unbalance loading or strand bar are stressed; One of them oil cylinder fault causes the chain unbalance loading; In addition, other factors also may cause the chain unbalance loading.After chain unbalance loading or strand bar stressing conditions take place, will speed up chain and damage, even break chain, so that cause the accident.
Above-mentioned safety hazard is ubiquity in the Forklift operational process, but because of can not monitoring the moving situation of elevating chain in real time, and existing Forklift can't early warning when the jacking system operation exception, thereby can not satisfy the requirement of operational security fully.
Summary of the invention
In view of this, the invention provides a kind of elevating chain anti-loose method, can when Forklift jacking system operation exception, report to the police; On this basis, the present invention provides a kind of elevating chain locking device simultaneously and uses the Forklift of this device.
For solving above technical matters, elevating chain anti-loose method provided by the invention comprises:
Detect the force-bearing situation of described each elevating chain in real time, obtain the stress value to be compared of described each elevating chain;
The stress value to be compared and the stressed threshold values of default elevating chain of described each elevating chain are compared, obtain first comparative result; And, the difference between the stress value to be compared of described each elevating chain of calculating, and, obtain second comparative result with difference between the stress value to be compared of described each elevating chain and the comparison of default elevating chain force difference threshold values;
The stress value to be compared that characterizes a described elevating chain at described first comparative result is less than or equal to the stressed threshold values of described default elevating chain, perhaps, when described second comparative result characterizes difference between the stress value to be compared of a described elevating chain more than or equal to described default elevating chain force difference threshold values, send alarm control signal;
Send alerting signal according to described alarm control signal.
Elevating chain locking device provided by the invention comprises:
A plurality of pressure sensors, relative set are used to detect the force signal that is subjected to of each elevating chain in each elevating chain bottom;
One controller is used to receive the force signal that is subjected to of described each elevating chain, obtains the stress value to be compared of described each elevating chain; And according to the expectant control strategy, the output alarm control signal; Described controller also stores and controls relevant parameter.
One annunciator is used for sending alerting signal according to described alarm control signal;
After this device started, described controller was controlled according to following strategy: the stress value to be compared and the stressed threshold values of default elevating chain of described each elevating chain are compared, obtain first comparative result; And, the difference between the stress value to be compared of described each elevating chain of calculating, and, obtain second comparative result with difference between the stress value to be compared of described each elevating chain and the comparison of default elevating chain force difference threshold values; The stress value to be compared that characterizes a described elevating chain at described first comparative result is less than or equal to the stressed threshold values of described default elevating chain, perhaps, when described second comparative result characterizes difference between the stress value to be compared of a described elevating chain more than or equal to described default elevating chain force difference threshold values, send alarm control signal.
Preferably, described pressure sensor is installed on the chain joint between described elevating chain and suspender.
Preferably, described pressure sensor is fixed on the adapter plate of described chain joint bottom.
Preferably, described controller, annunciator are continued to use controller, the annunciator of equipment itself.
Preferably, described alerting signal is one of sound, light, vibration signal or arbitrary combination.
On this basis, make the Forklift of above-mentioned elevating chain locking device, described alerting signal is one of sound, light, electricity, vibration signal or arbitrary combination.
The present invention can report to the police when Forklift jacking system operation exception by detecting the stressing conditions of each chain, and particularly: stuck when door frame, suspender operation, or assembly parts are when interfering with door frame, and chain relaxes and do not stress during the decline door frame; And when the chain unbalance loading, the stressed difference of chain; Therefore, too small at the chain stress value, perhaps, when force difference is excessive between chain, just can send alerting signal, thereby remind the operator to take measures the generation of preventing accident.
Description of drawings
Figure 1A is the structural representation of a Forklift lifting mechanism;
Save the left view after the partial component among Figure 1B Figure 1A;
Fig. 2 is the diagram of circuit of elevating chain anti-loose method of the present invention;
Fig. 3 is the structural representation of elevating chain locking device of the present invention;
Fig. 4 is the left view of Fig. 3, has saved controller and annunciator among this figure.
The specific embodiment
Basic design of the present invention is, detects the stressing conditions of each elevating chain, when the excessive or wherein a certain chain of force difference between each chain does not stress, sends alerting signal.
This be because, the power of Forklift lifting is oil cylinder, but directly application mechanism is a chain, the motion of chain directly drives the operation of suspender; Simultaneously, chain is a compliant mechanism, its characteristic be stressed must tensioning, loose must not stressing.Therefore, detect the real-time stress situation of suspender chain in the door frame, just can monitor the operation conditions of Forklift jacking system in real time; Thereby can when Forklift jacking system operation exception, report to the police, prevent the generation of accident.
Describe below in conjunction with embodiment and accompanying drawing.
Please referring to Fig. 2, this figure is the diagram of circuit of elevating chain anti-loose method of the present invention, specifically may further comprise the steps:
S201, detect the force-bearing situation of described each elevating chain in real time, obtain the stress value to be compared of described each elevating chain.
S202, with the stress value to be compared of described each elevating chain and the stressed threshold values of default elevating chain relatively obtains first comparative result.
S203, judge that the stress value to be compared whether described first comparative result characterizes a described elevating chain is less than or equal to the stressed threshold values of described default elevating chain,
If enter the S207 step;
If not, enter the S204 step.
When the stress value to be compared of elevating chain is less than or equal to the stressed threshold values of described default elevating chain, illustrate that this elevating chain is in relaxed state, does not promptly have stressed; At this moment, show that the operation of generation door frame or suspender is stuck, under this kind situation, should report to the police, so that operator's (can be the people, also can be main control system) in time takes measures.
Difference between the stress value to be compared of S204, described each elevating chain of calculating.
S205, with the difference between the stress value to be compared of described each elevating chain and default elevating chain force difference threshold values relatively obtains second comparative result.
S206, judge when whether described second comparative result characterizes difference between the stress value to be compared of a described elevating chain more than or equal to described default elevating chain force difference threshold values,
If enter the S207 step;
If not, enter the S201 step.
Difference between the stress value to be compared of a described elevating chain illustrates described elevating chain unbalance stress during more than or equal to described default elevating chain force difference threshold values, is in unbalance loading or strand bar strained condition; In such cases, also should report to the police, so that the operator in time takes measures.
S207, send alarm control signal;
S208, send alerting signal according to described alarm control signal.
After sending alerting signal, the operator just can in time take measures, thereby the accident that prevents takes place.Wherein, described alerting signal can be one of sound, light, electrical vibration signal or arbitrary combination.
In the foregoing description, by detecting the strained condition of suspender chain in the door frame, can judge whether the stuck and chain unbalance loading of door frame or suspender operation takes place in the jacking system or the strand bar is subjected to force phenomenon, thereby can monitor the operation conditions of Forklift jacking system in real time, report to the police when making Forklift jacking system operation exception, prevent the generation of accident.
It should be noted that the present invention is not limited to the sequence of steps in the foregoing description, for example: the order of two determining steps can be exchanged; The step of the difference between the stress value to be compared of described each elevating chain of calculating also can be carried out before two determining steps; Or the like.After adjusting these sequence of steps, can realize the present invention's purpose equally, not repeat them here.
Please be simultaneously referring to Fig. 3, Fig. 4, wherein, Fig. 3 is the structural representation of elevating chain locking device of the present invention; Fig. 4 is the left view of Fig. 3, has saved controller and annunciator among this figure.Elevating chain locking device of the present invention comprises:
A plurality of pressure sensors 2 (quantity is not less than the quantity of chain 1, only illustrates one among Fig. 3, Fig. 4), relative set is used to detect the force signal that is subjected to of each elevating chain 1 in the bottom of each elevating chain 1, and this is subjected to force signal to be transfused to controller 3 to control.
One controller 3 is used to receive the force signal that is subjected to of each elevating chain 1, obtains the stress value to be compared of each elevating chain 1; And according to the expectant control strategy, the output alarm control signal; Controller 1 also stores and controls relevant parameter, as: the stressed threshold values comparison of elevating chain, elevating chain force difference threshold values, or the like.
One annunciator 4 is used for sending alerting signal according to alarm control signal; After sending alerting signal, the operator just can take urgent measure, and the accident that prevents takes place.
After this device started, controller 3 was controlled according to following strategy: the stress value to be compared and the stressed threshold values of default elevating chain of each elevating chain are compared, obtain first comparative result; And, calculate the difference between the stress value to be compared of each elevating chain, and with the difference between the stress value to be compared of each elevating chain 1 and default elevating chain force difference threshold values relatively, obtain second comparative result; The stress value to be compared that characterizes an elevating chain at first comparative result is less than or equal to the default stressed threshold values of elevating chain, perhaps, when second comparative result characterizes difference between the stress value to be compared of an elevating chain more than or equal to default elevating chain force difference threshold values, send alarm control signal.
After this device started, when the door frame operation interfered, if the decline door frame, chain 1 can lax not stress; The force signal that is subjected to by detected pressures sensor 3 can send alerting signal, and the volitional check door frame descends; When chain 1 unbalance loading, each chain 1 stressed difference when stress value difference is excessive, is sent alerting signal, so that take measures.
Shown in Fig. 3,4, pressure sensor 2 is installed on the chain joint 5 between elevating chain 1 and suspender, specifically can be fixed on the adapter plate of chain joint 5 bottoms.This mounting means can guarantee that dynamometry is accurate, and is convenient to install.
Among the present invention, controller 3, annunciator 4 can be provided with separately, also can continue to use the controller and the annunciator of equipment itself.In addition, alerting signal can be one of sound, light, electrical vibration signal or arbitrary combination, is as the criterion with reliable prompting operator.
It should be noted that the present invention also can adopt pulling force sensor to measure the pulling force of chain 1, its groundwork is same as the previously described embodiments; In fact this scheme is equal to the described technical scheme of the foregoing description, does not repeat them here.
Use the Forklift of above-mentioned locking device, for the jacking system operation has increased safety control one.When Forklift jacking system operation exception, can give warning in advance, thereby reduce the loss, avoid accident, thereby guarantee personnel and property safety better.
The above only is a preferred implementation of the present invention, should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, and protection scope of the present invention should be as the criterion with claim institute restricted portion.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1, a kind of elevating chain anti-loose method is characterized in that, comprising:
Detect the force-bearing situation of described each elevating chain in real time, obtain the stress value to be compared of described each elevating chain;
The stress value to be compared and the stressed threshold values of default elevating chain of described each elevating chain are compared, obtain first comparative result; And, the difference between the stress value to be compared of described each elevating chain of calculating, and, obtain second comparative result with difference between the stress value to be compared of described each elevating chain and the comparison of default elevating chain force difference threshold values;
The stress value to be compared that characterizes a described elevating chain at described first comparative result is less than or equal to the stressed threshold values of described default elevating chain, perhaps, when described second comparative result characterizes difference between the stress value to be compared of a described elevating chain more than or equal to described default elevating chain force difference threshold values, send alarm control signal;
Send alerting signal according to described alarm control signal.
2, a kind of elevating chain locking device is characterized in that, comprising:
A plurality of pressure sensors, relative set are used to detect the force signal that is subjected to of each elevating chain in each elevating chain bottom;
One controller is used to receive the force signal that is subjected to of described each elevating chain, obtains the stress value to be compared of described each elevating chain; And according to the expectant control strategy, the output alarm control signal; Described controller also stores and controls relevant parameter.
One annunciator is used for sending alerting signal according to described alarm control signal;
After this device started, described controller was controlled according to following strategy: the stress value to be compared and the stressed threshold values of default elevating chain of described each elevating chain are compared, obtain first comparative result; And, the difference between the stress value to be compared of described each elevating chain of calculating, and, obtain second comparative result with difference between the stress value to be compared of described each elevating chain and the comparison of default elevating chain force difference threshold values; The stress value to be compared that characterizes a described elevating chain at described first comparative result is less than or equal to the stressed threshold values of described default elevating chain, perhaps, when described second comparative result characterizes difference between the stress value to be compared of a described elevating chain more than or equal to described default elevating chain force difference threshold values, send alarm control signal.
3, elevating chain locking device as claimed in claim 2 is characterized in that, described pressure sensor is installed on the chain joint between described elevating chain and suspender.
4, elevating chain locking device as claimed in claim 3 is characterized in that, described pressure sensor is fixed on the adapter plate of described chain joint bottom.
5, elevating chain locking device as claimed in claim 2 is characterized in that, described controller, annunciator are continued to use controller, the annunciator of equipment itself.
As each described elevating chain locking device of claim 2-5, it is characterized in that 6, described alerting signal is one of sound, light, electrical vibration signal or arbitrary combination.
7, a kind of Forklift is characterized in that, uses as each described elevating chain locking device of claim 2-5.
8, Forklift as claimed in claim 7 is characterized in that, described alerting signal is one of sound, light, vibration signal or arbitrary combination.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101784129A CN101407307B (en) | 2008-11-24 | 2008-11-24 | Anti-loosening method and device for lifting chain and stacking machine using device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101784129A CN101407307B (en) | 2008-11-24 | 2008-11-24 | Anti-loosening method and device for lifting chain and stacking machine using device |
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| CN101407307A true CN101407307A (en) | 2009-04-15 |
| CN101407307B CN101407307B (en) | 2011-02-09 |
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| CN2008101784129A Active CN101407307B (en) | 2008-11-24 | 2008-11-24 | Anti-loosening method and device for lifting chain and stacking machine using device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102583202A (en) * | 2012-02-27 | 2012-07-18 | 三一集团有限公司 | Lifting chain loosening or breaking recognition device and engineering machinery using same |
| CN102917973A (en) * | 2010-06-08 | 2013-02-06 | 罗伯特·博世有限公司 | Method for determining the probability of a handling truck's tipping over |
| CN106082024A (en) * | 2015-04-30 | 2016-11-09 | Bt产品公司 | The method of the state of a kind of device determined in fork truck and fork truck |
| CN110626988A (en) * | 2019-08-26 | 2019-12-31 | 南安市莱康机械科技有限公司 | Automatic hydraulic vehicle loading elevator |
| CN112174058A (en) * | 2020-11-06 | 2021-01-05 | 浙江鼎力机械股份有限公司 | Lifting structure of electric lifting type aerial work platform truck |
Family Cites Families (3)
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| JP4007299B2 (en) * | 2003-10-07 | 2007-11-14 | トヨタ自動車株式会社 | Failure diagnosis device for fuel processing system |
| JP2005112620A (en) * | 2003-10-10 | 2005-04-28 | Hanaoka Sharyo Kk | Elevator for wheel chair |
| CN2883305Y (en) * | 2006-02-27 | 2007-03-28 | 浙江诺力机械股份有限公司 | Weighting stacker |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102917973A (en) * | 2010-06-08 | 2013-02-06 | 罗伯特·博世有限公司 | Method for determining the probability of a handling truck's tipping over |
| CN102917973B (en) * | 2010-06-08 | 2015-08-19 | 罗伯特·博世有限公司 | For determining method and the control unit thereof of the possibility of tumbling of vehicle |
| US9169110B2 (en) | 2010-06-08 | 2015-10-27 | Robert Bosch Gmbh | Method for determining the probability of a handling truck's tipping over |
| CN102583202A (en) * | 2012-02-27 | 2012-07-18 | 三一集团有限公司 | Lifting chain loosening or breaking recognition device and engineering machinery using same |
| CN102583202B (en) * | 2012-02-27 | 2014-01-29 | 三一集团有限公司 | Lifting chain loosening or breaking recognition device and engineering machinery using same |
| CN106082024A (en) * | 2015-04-30 | 2016-11-09 | Bt产品公司 | The method of the state of a kind of device determined in fork truck and fork truck |
| CN106082024B (en) * | 2015-04-30 | 2019-05-07 | 丰田物料处理制造(瑞典)公司 | The method and fork truck of a kind of state of device in determining fork truck |
| CN110626988A (en) * | 2019-08-26 | 2019-12-31 | 南安市莱康机械科技有限公司 | Automatic hydraulic vehicle loading elevator |
| CN112174058A (en) * | 2020-11-06 | 2021-01-05 | 浙江鼎力机械股份有限公司 | Lifting structure of electric lifting type aerial work platform truck |
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