CN202196297U

CN202196297U - Control device capable of preventing equipment misoperation

Info

Publication number: CN202196297U
Application number: CN201120266896XU
Authority: CN
Inventors: 蔡军
Original assignee: Panasonic Electric Works Wanbao Guangzhou Co Ltd
Current assignee: Panasonic Wanbao Home Appliances Electric Iron Guangzhou Co Ltd
Priority date: 2011-07-26
Filing date: 2011-07-26
Publication date: 2012-04-18
Anticipated expiration: 2021-07-26

Abstract

The utility model discloses a control device capable of preventing equipment misoperation, which comprises a cylinder used for driving a moving part to act, and an electromagnetic valve used for controlling the action of the cylinder; the control device also comprises two normally-open switches which are connected in parallel, and a programmable logic controllers (PLC) that is respectively connected with the two normally-open switches and is used for leading the electromagnetic valve to act within the preset time during the closed time difference of the two normally-open switches. In the control device capable of preventing equipment misoperation, as the two normally open switches which are connected in parallel are connected with a signal source, a misoperation signal is sent to the PLC when one of the normally-open switches is closed. As long as the PLC receives the signals that the two normally-open switches are switched on at the same time, the electromagnetic valve is controlled to act, so that the safety of equipment can be improved.

Description

Prevent the control device of equipment maloperation

Technical field

The utility model relates to a kind of control device that prevents the equipment maloperation.

Background technology

In the manufacture process of the article of various plastic materials, often need be fused into one to the mode of two parts through heating, perhaps stamp relevant sign or image on the surface of workpiece through thermoprinting machine.The service part of heat sealing machine or thermoprinting machine need be heated to uniform temperature, and service part moves between working position and clear position under the drive of cylinder, and cylinder is by the solenoid control that is connected with PLC (programmable logic controller (PLC)).

The general workflow of heat sealing machine or thermoprinting machine is such: be placed into the precalculated position to workpiece to be processed by the operator; When the temperature of the service part of heat sealing machine or thermoprinting machine reached predetermined numerical value, the operator pressed the button, and sends the signal of action to PLC; PLC sends the signal of a high level to solenoid valve; Connect solenoid valve, cylinder drives the service part action, carries out operation.Because the temperature of the service part of heat sealing machine or thermoprinting machine is very high; For safety, do not accidentally injure the operator, in the prior art; Prevent maloperation through two normal open switch at a distance of the push button of certain distance are set, be connected with PLC after these two normal open switch are connected each other.Promptly when hand Push button of operator, can not send any signal, have only, could send signal, improve processing safety through the mode that takies operator's both hands to PLC when two hands all during Push button to PLC.

Still there is potential safety hazard in the prior art; When the operator for easy to operate, through other modes, after pressing down one of them button; Adopt adhesive tape or other article to fix; Make one of them button be in normally closed state, thereby only need another button of manual manipulation to operate, cause the accident of accidental injury easily.The defective of prior art is that PLC is connected with the normal open switch of series connection, and during only closed normal open switch, PLC can not receive any signal, can not find maloperation, can not effectively avoid accident.

The utility model content

To the above-mentioned defective that prior art exists, the problem that the utility model will solve is, a kind of control device that prevents the equipment maloperation is provided, and can find one-handed performance, improves the security of equipment.

For addressing the above problem, the utility model provides a kind of control device that prevents the equipment maloperation, and said equipment comprises the cylinder that drives the moving component action, the solenoid valve that is used to control said cylinder action; Said control device comprises the normal open switch of two parallel connections and is connected and when closed mistiming of two said normal open switch is in preset time, makes the PLC of said solenoid valve action respectively with two said normal open switch.

As preferably, said preset time is 0.1s-3s.

Further, said preset time is 0.3s.

As preferably, said normal open switch is a button.

As preferably, said equipment is heat sealing machine or thermoprinting machine.

The control device of the equipment that the prevents maloperation of the utility model is connected with said signal source through two normal open switch that parallel connection is set, and when one of them normal open switch is closed, can send signal to PLC.When promptly having only a normal open switch closed, PLC can receive the signal of maloperation; Have only when PLC receives the signal that two normal open switch all connect simultaneously, just handle the solenoid valve action, thus the security that has improved equipment.

Description of drawings

Fig. 1 is the structure composition frame chart of the control device of the equipment that the prevents maloperation of the embodiment of the utility model.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail, but not as to qualification of the present invention.

The equipment that the control device of the equipment that the prevents maloperation of the embodiment of the utility model is controlled comprises the cylinder that drives the moving component action, the solenoid valve that is used for the control cylinder action.As shown in Figure 1, the control device of the equipment that the prevents maloperation of the embodiment of the utility model comprises the PLC that control electromagnetic valve opens and closes, and PLC is connected with power supply with normal open switch 52 through the normal open switch 51 of parallel connection; PLC only just sends the signal of opening to solenoid valve when two normal open switch 51 and normal open switch 52 are closed simultaneously, solenoid valve is connected, and the cylinder action drives the service part motion.The mistiming of having only normal open switch 51 and normal open switch 52 closures, PLC just thought closed simultaneously in preset time.In the present invention and embodiment; The mistiming that normal open switch is closed referred to from the closed beginning of one of them normal open switch to the time between another normal open switch closure; This preset time can be provided with according to actual conditions; Can select between the 3s at 0.1s, like 3s, 2s, 1s, 1.5s, 0.5s, 0.3s etc., this preset time is set through PLC.When normal open switch 51 or normal open switch 52 have only one when closed; PLC can receive the signal that has only a normal open switch to connect; When surpassing preset time, and another normal open switch does not still have closure, and then PLC thinks that the closure of first normal open switch is maloperation; PLC no longer sends to solenoid valve and lets the signal of its action, and promptly solenoid valve is in lockup state.Even closed again another normal open switch, or simultaneously closed two normal open switch can not make solenoid valve connect, have only through special personnel just can make it be returned to original state to the PLC release.Thereby avoided operating personnel to be in normally off to one of them normal open switch; Another normal open switch of manual manipulation and the operational risk that causes, as be in that another hand in the free time stretches to the parts that carry out welding or impression action and the adversary damages.Compared with prior art; The employing PLC of the utility model is connected with the mode of two normal open switch parallel connections, as long as any normal open switch closure, PLC all can receive signal; Thereby when having only a normal open switch closed; When just maloperation taking place, PLC just can receive the signal of maloperation, can before having an accident, prevent.And in the prior art,, when one of them is closed because generation is unusual, can not send any signal to PLC owing to adopt two normal open switch of series connection to be connected with PLC, PLC can not find operation exception.As an example, in the present embodiment, normal open switch 51 all adopts the push button normal open switch with normal open switch 52, promptly presses the button and promptly connects circuit, unclamps the back button and ejects automatically, and circuit breaks off.Normal open switch 51 can also adopt the manually operated normal open switch of other forms of needs with normal open switch 52.

The control device of the equipment that the prevents maloperation of the utility model; Two normal open switch through parallel connection is set are connected with signal source; When one of them presses following time, can send signal to PLC, have only when PLC receives the signal that two normal open switch all connect simultaneously; Just handle the solenoid valve action, thus the security that has improved equipment.

Those skilled in the art should be understood that; " equipment " that the control device of the equipment that the prevents maloperation of the utility model is controlled comprises heat sealing machine or this type of thermoprinting machine owing to there is the equipment of operational hazards in high temperature, can also be applied in because high pressure and on the dangerous equipment.In fact, the utility model said " equipment " comprises that all adopt biswitch to prevent the equipment of maloperation, and through the normal open switch and the PLC of parallel connection, the imperative operation person adopts bimanualness, thereby prevents maloperation, improves the security of equipment.

Certainly; The above is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also are regarded as the protection domain of the utility model.

Claims

1. control device that prevents the equipment maloperation, said equipment comprise the cylinder that drives the moving component action, the solenoid valve that is used to control said cylinder action; It is characterized in that said control device comprises the normal open switch of two parallel connections and is connected and when closed mistiming of two said normal open switch is in preset time, makes the PLC of said solenoid valve action respectively with two said normal open switch.

2. the control device that prevents the equipment maloperation as claimed in claim 1 is characterized in that, said normal open switch is a button.

3. the control device that prevents the equipment maloperation as claimed in claim 1 is characterized in that, said equipment is heat sealing machine or thermoprinting machine.