CN102152164B - Isolator switching device - Google Patents
Isolator switching device Download PDFInfo
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- CN102152164B CN102152164B CN201010616274.5A CN201010616274A CN102152164B CN 102152164 B CN102152164 B CN 102152164B CN 201010616274 A CN201010616274 A CN 201010616274A CN 102152164 B CN102152164 B CN 102152164B
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Abstract
The invention discloses an isolator switching device, which comprises an isolator (2), a cylinder executive component (31) moving the isolator (2) via fluid pressure, a supply loop (4) supplying work flow to the cylinder executive component (31), and control components (46, 5). When change of the work fluid pressure or fluid related parameters in the supply loop (4) is detected by a detecting component (45) during the isolator (2) controlled by an operating component (42) and moving between close and open states, the control components control the work fluid of the cylinder executive component (31) to ensure the stop or reverse movement of the isolator (2).
Description
Technical field
Technology disclosed herein relates to one such as in the various industrial equipments such as manufacturing installation, processing unit (plant) and working equipment, that grades between the operate portions being equivalent to this equipment is isolated between object and the operating personnel of this equipment, be used for the switching device comprising the slider such as covering, door of both being kept apart, particularly a kind of anti-interference mechanism (safety device) of this slider.
Background technology
Such as, in the various industrial equipments such as such as manufacturing installation, processing unit (plant) and working equipment, for guaranteeing the safety of carrying out the operating personnel operated etc. near this equipment, the slider such as covering (lid), door leaf (door) that the operate portions between described equipment is graded and the two kept apart between operating personnel sometimes can be set.Such slider generally can move between following two states.The first state in this two states is, as mentioned above, in the course of work of device, state (this state that such slider grades between described operate portions and the two kept apart between operating personnel, according to the shape of slider etc. and not necessarily is in closed condition, but below for ease of illustrating, be called closed condition); The second state is, when device stops, such as when ensureing that operating personnel carry out maintenance etc., they can touch operate portions and grade, such slider is allowed to grade from described operate portions and to leave between operating personnel, (not the same with above-mentioned to the two state of being isolated, the state opened might not be become down in the shape etc. of some slider, but for ease of illustrating, be called open mode).
We are known: in order to automatically carry out the Push And Release of such slider, and useful cylinder is used as power source as described in such as following publication.Urgently desirably, under the structure automatically opening, close slider, arrange one when this slider moves particularly when slider moves from open mode towards closed condition, operating personnel, other barrier can not interfere with slider, prevent operating personnel, other barrier is isolated the safety device that body is clamped.
Such as, in Japanese Laid-Open Patent Publication Laid-Open flat 5-16053 publication described invention is as follows: such safety device is configured to: hollow projectile cartridge gonosome has been located at the end edge portion of the switch gate of slippage in the horizontal direction, in carry out having barrier to interfere described hollow projectile cartridge gonosome to be crushed in the process of slippage at this switch gate, by the change of internal pressure, it is detected, and allow this door stop.
Such as, in day disclosure utility model publication Beneficial 6-42044 publication described safety device is configured to: install in addition again on the automatic opening and closing door of slippage in the horizontal direction one small-sized can the secondary door of relative movement, utilize limit switch to make described secondary door move this situation by there being barrier to interfere in the process of this automatic opening and closing door slippage to detect, and allow this automatic opening and closing door stop or reverse movement.
The safety device such as, recorded in Japanese Laid-Open Patent Publication Laid-Open 2000-354936 publication is as follows: except the switch door leaf of opening, closing the opening portion of slippage along the vertical direction, also the detection body that contains closely switch is installed to this opening portion, described in utilization, closely barrier to be sandwiched between the opening edge of opening portion and switch door leaf detection body this situation mobile and to detect by switch, and allows switch door leaf stop or reverse movement.Also following technology contents is described in hurdle: be arranged in by area sensor in the moving range of described switch door leaf in " prior art " of this publication, in time detecting that barrier crosses this situation by area sensor, switch door leaf is allowed to stop or reverse movement.
But as safety device disclosed in described each publication, when utilizing various sensor direct-detection to interfere, on the one hand, sensor is more expensive, and on the other hand, the detection of sensor can exist dead angle, this accuracy of detection not necessarily is very high.If eliminate such dead angle and increase sensor, be then that the number of such as increased sensor is more, cost will be higher.On the other hand, the number only by increase sensor is the extremely difficult dead angle of elimination completely, cannot avoid detecting and omit.
Summary of the invention
Technology disclosed herein completes in view of the premises.Its object is to: in the switching device of slider possessing auto-open-close, realize precision in the switch motion of slider open and close at an easy rate and detect that slider and barrier interfere this situation well, this slider can be allowed reliably to stop or the safety device of reverse movement.
The present application people are not the interference situations being conceived to direct-detection slider and barrier, but to utilizing fluid pressure to allow the cylinder execution unit of this slider movement carry out various research and inquirement.Its result, the present application people find: the parameter relevant with the pressure of the working fluid of the supply circuit by working fluid supply cylinder execution unit or flow, certain under normal circumstances in the process of described slider movement, but when described slider and barrier interfere, described parameter can change, and the present invention is according to having found above.
Specifically, technology disclosed herein relates to a kind of switching device of slider.This switching device comprises slider, cylinder execution unit, supply circuit, functional unit, detection part and control assembly.Wherein, described slider is isolated between object and operating personnel between the regulation of industrial equipment, for being isolated object and described operating personnel are mutually isolated opens by described; Described cylinder execution unit is bound up on described slider, and utilizes fluid pressure to allow described slider be isolated closed condition that object and described operating personnel keep apart by described and described being isolated between open mode that object and described operating personnel keep apart do not moved; Described supply circuit is connected on described cylinder execution unit, and working fluid is supplied this cylinder execution unit; Described functional unit is located on described supply circuit, and allows the work of described cylinder execution unit, to ensure that described slider moves between described closed condition and open mode by controlling described working fluid to supply described cylinder execution unit; The parameter relevant to the pressure of described working fluid or flow is detected at the assigned position place of described detection part on described supply circuit; Described control assembly, when the parameter detected by described detection part in the process of movement between described closed condition and described open mode by operation described functional unit at described slider has had change, control the supply to the described working fluid of described cylinder execution unit, to ensure that described slider stops or reverse movement.
Here; " industrial equipment " is mainly included in the places such as factory to carry out manufacturing, process, be shaped and the equipment such as manufacturing installation, processing unit (plant) and working equipment of process etc.; " being isolated object of industrial equipment " is; in the course of work of industrial equipment; contact, encounter and be involved in this by reliably preventing the operating personnel operating this industrial equipment etc. and be isolated object, protect operating personnel and/or be isolated the part protected of object.Such as from the viewpoint of protection operating personnel, be isolated the part etc. that part that object is included in the work of industrial equipment high speed such as carries out the cutter cut etc." slider " can comprise being isolated covering (lid) that object entirety covers, be arranged on and be isolated door leaf (door) between object and operating personnel or shutter etc." (slider) moves in off position and between open mode " comprising: slider by the path of regulation to move to from assigned position the another location different from it situation, such as expansion and roll shutter, utilize the change of slider shape to switch the situation etc. of closed condition or open mode.
" make use of the cylinder execution unit of fluid pressure " is possess such as having come the cylinder chamber of air pressure or oil pressure, and this fluid can be converted to the execution unit of mechanical energy, comprising by controlling delivering fluids pressure, doing the reciprocating execution unit of linearity in specified directions and centered by the axle of regulation, carrying out the execution unit etc. of wobbling action.
" functional unit " is that operating personnel etc. operate, and can control the parts of the working fluid of supply cylinder execution unit, can comprise the such as supply of switch operating fluid and the transfer valve of non-supply.Such as, functional unit can be made up of the operating valve directly manually carrying out the switching action of this transfer valve, also can by electrically carrying out the magnetic valve of described switching action and being made up of operated operated keys such as operating personnel for the switching action of carrying out this magnetic valve.
" detect the detection part of the parameter relevant with the pressure of working fluid or flow " and be the parts of the pressure of testing fluid, flow, pressure-dependent special parameter or the special parameter relevant with flow, can containing export the signal of telecommunication corresponding to these parameter sizes so-called sensor (pressure sensor, flow sensor etc.), carry out mechanically operated parts corresponding with parameter size (such as, compression zone moves the parts of an amount corresponding with pressure size).
When described detection part is electrical structure, " control assembly " can comprise to the state of working fluid supply cylinder execution unit and the magnetic valve state of working fluid supply cylinder execution unit do not switched and the signal of telecommunication that accepts from described detection part are exported to described magnetic valve regulation the signal of telecommunication circuit and form." circuit " mentioned here can comprise: the circuit formed by means of hardware and software circuit processor and combination of software got up.When described detection part is frame for movement, control assembly can be formed primarily of the parts (such as attaching parts) etc. of the switching action mechanical action of described detection part being converted to transfer valve.
Under this structure, according to the working fluid operation of functional unit being controlled to supply cylinder execution unit, slider just can move thus in off position or between open mode.That is, slider is switched to closed condition or open mode according to the operation of operating personnel.In the process of described slider movement, under normal circumstances, relevant with the pressure of the working fluid of predetermined portion on supply circuit or flow parameter is necessarily constant.
In contrast, when in the process of slider movement, this slider and such as operating personnel interfere etc., this interference becomes the resistance hindering slider movement, can impact the working fluid allowing the drive source of this slider movement namely supply execution unit.Therefore, necessarily constant under normal circumstances described parameter can change when interfering.By the situation of change of detection part detected parameters, control assembly controls the working fluid of supply cylinder execution unit according to the situation of change of the parameter detected, to ensure that slider stops or reverse movement.When in the process of slider movement, this slider and barrier there occurs interference like this, because slider stops or reverse movement and can be isolated to operating personnel the situation that body clamps and prevent trouble before it happens.
So, because under said structure, be not utilize sensor direct-detection slider and barrier to interfere this situation, so the high cost problem because using caused by sensor can be solved.Meanwhile, the Dead Core Problems of sensor is also solved.That is, because under said structure, the situation of change of the parameter relevant with the pressure of the working fluid on supply circuit or flow is utilized to detect, so no matter barrier in which part of slider interferes, this parameter can both be changed slider and barrier interfere this situation to detect.Therefore, there will not be the problem at dead angle, precision can detect the interference situation of slider and barrier well.Consequently, the safety device of high measurement accuracy can be realized at an easy rate.
Described control assembly can be configured to: when the value of the parameter detected by described detection part has exceeded the threshold value set in advance, it controls the supply to the described working fluid of described cylinder execution unit, to ensure that described slider stops or reverse movement.
According to this structure, be the interference situation according to detecting slider to the comparison of the parameter value detected and threshold value, so namely can realize the high precision test of the interference situation to slider by an easy structure.Here, " parameter value exceedes the threshold value set in advance " comprises parameter value becomes the value that is greater than threshold value and parameter value becomes the value both of these case being less than threshold value.
Under this structure, the switching device of described slider can also comprise: detect the condition detection portion that described slider is not described closed condition or described open mode; Described control assembly can also be configured to: when being detected described slider by described condition detection portion and be not closed condition or open mode and the parameter value detected by described detection part having had a change, it controls the supply to the described working fluid of described cylinder execution unit, to ensure that described slider stops or reverse movement.
Described slider be in closed condition or open mode and slider remain static time, because neither to cylinder execution unit supply working fluid, also working fluid is not discharged from cylinder execution unit, therefore relevant with the pressure of the working fluid on supply circuit or flow described parameter is a definite value, but also there will be the situation that this value is certain value under the state exceeding described threshold value.In this case, likely flase drop is measured slider and be there occurs this situation of interference.Therefore, by combining the state utilizing the slider detected by condition detection portion that is the comparison not being closed condition or not being this situation of open mode and carrying out the parameter value detected and threshold value, just precision the interference occurred when slider moves can be detected well.
Described control assembly can be configured to: when the rate of change of the parameter detected by described detection part has exceeded the threshold value set in advance, it controls the supply to the described working fluid of described cylinder execution unit, to ensure that described slider stops or reverse movement.
According to this structure, because be not according to parameter value, but detect the interference of slider according to the rate of change of parameter, so can prevent the interference situation of error detection slider, accuracy of detection can improve further.
Described slider can be configured to be elevated in the vertical direction, described cylinder execution unit has piston rod, this piston rod along with described working fluid supply and discharge and extend in the vertical direction and shrink, and allow described slider be elevated between open mode and closed condition.Described control assembly can be configured to: when the parameter value just detected by described detection part towards the process of closed condition movement from described open mode at described slider has had change, it controls the working fluid of the described cylinder execution unit of supply, to ensure that described slider stops or reverse movement.
Accompanying drawing explanation
Shown in Fig. 1 is the approximate three-dimensional map of the cable processing apparatus of the safety head be provided with involved by embodiment;
Fig. 2 is the top view of the formation roughly representing cable processing apparatus;
Fig. 3 is the circuit diagram of the formation in the air pressure loop representing switching device, and shown is the state that lid is opened;
Fig. 4 is the circuit diagram of the formation in the air pressure loop representing switching device, the state of shown is cover closing;
Fig. 5 is the circuit diagram of the formation in the air pressure loop representing switching device, and shown is the abnormal condition that lid and barrier there occurs interference in the process of lid decline;
Fig. 6 is the circuit diagram of the formation representing control circuit;
Fig. 7 (a) and Fig. 7 (b) is the figure of one of change waveform of the detected value representing pressure sensor example, the waveform that what Fig. 7 (a) represented is when not interfering, shown in Fig. 7 (b) is waveform when there occurs interference.
Description of reference numerals
1 cable processing apparatus
2 safety heads (slider)
3 switching devices
31 cylinders (cylinder execution unit)
311 piston rods
32 automatic switches (condition detection portion)
4 supply circuits
42 operating valves (functional unit)
45 pressure sensors (detection part)
46 magnetic valves (control assembly)
5 control circuits (control assembly)
Detailed description of the invention
Below, by reference to the accompanying drawings the embodiment of safety device is described.In addition, following preferred embodiment is only used for the example of the essence that the present invention is described.Fig. 1 be shown schematically in the switching device of the safety head 2 comprised as one of slider example, as the cable processing apparatus 1 of one of industrial equipment.Cable processing apparatus 1 a kind of very long insulated wire is cut into certain length, strips the insulating barrier at the both ends of the insulated wire that this has scaled off, pressed solidly by terminal at this insulating barrier by the device at electric wire both ends peelled off.
As shown in Figure 1 and Figure 2, by various apparatus arrangement on the upper surface of workbench 10, namely form cable processing apparatus 1.The left side of paper in fig. 2, is provided with the spool that insulated wire W is wound thereon, omits diagram, and a left side for the insulated wire W paper from Fig. 2 extracted out from this spool is towards this cable processing apparatus 1 (the hollow arrow direction with reference in Fig. 2) of right supply.In addition, in the following description, for ease of explanation, the electric wire direction of the supply is decided to be fore-and-aft direction (in Fig. 2 paper left and right directions), the supply side of electric wire is called front side, the side contrary with front side is called rear side, the direction orthogonal with the direction of the supply of electric wire is decided to be left and right directions (in Fig. 2 paper above-below direction), claiming in Fig. 2 is left side on the upside of paper, is right side on the downside of paper.
Specifically, cable processing apparatus 1 comprises: length measuring roller 11 and F type pincers 12 clamp 13 with R type.Wherein, on the upper surface that length measuring roller 11 is arranged in workbench electric wire supply side (front side) and be positioned at the substantial middle position of left and right directions, and discontinuously insulated wire W to be sent towards rear in units of certain length; This F type pincers 12 clamp 13 electric wires being arranged in this length measuring roller 11 with R type and supply downstream (rear side), are clamped the insulated wire W sent from this length measuring roller 11.Between F type pincers 12 and R type pincers 13, be provided with cutting insulated wire, peel off the cutter 14 of insulating barrier.The left side of F type pincers 12 is provided with front side and presses solidly machine 15; The right side of R type pincers 13 is provided with rear side and presses solidly machine 16.Meanwhile, the position pressing solidly machine 16 near described rear side is provided with electric wire and discharges machine 17.Here, the overview to the process action of insulated wire W in this cable processing apparatus 1 is described.Clamp 12 by F type clamp 13 and clamp with R type the insulated wire W sent from length measuring roller 11, utilize cutter 14 F type clamp 12 and the R type centre position of clamping 13 carry out the cutting work of insulated wire W.Afterwards, F type pincers 12 hold insulated wire W and move towards the rear, and cutter 14 contact with the rearward end of this insulated wire W, and F type pincers 12 move from this state towards the direction returning to home position, so just only have the insulating barrier of the rearward end of insulated wire W to be peelled off.Equally, hold insulated wire W move forward by clamping plate 13, cutter 14 contact with the leading section of this insulated wire W afterwards, and R type pincers 13 move from this state towards the direction returning to home position, so just only have the insulating barrier of the leading section of insulated wire W to be peelled off.After like this insulating barrier of wire end being peelled off, just hold the solid machine 15 of insulated wire W side pressure forward by F type pincers 12 and move, meanwhile, hold the solid machine 16 of insulated wire W side pressure backwards by R type pincers 13 and move (chain-dotted line with reference in Fig. 2).Then, in this condition, what press solidly in front side that machine 15 and rear side press solidly that machine 16 carries out terminal T to press solidly each end of electric wire W respectively presses solidly action, F type pincers 12 hold insulated wire W and return to home position, on the other hand, insulated wire W to give after electric wire discharges machine 17 by R type pincers 13, does not return to home position with just clamping insulated wire W, and that discharge that machine 17 obtains from electric wire is the insulated wire W be disposed that terminal T has pressed solidly at two ends.Such action is carried out continuously.In addition, cut insulated wire W here, peel off insulating barrier and all carry out with cutter 14.But in addition, three cutter can also be possessed, such as, be the cutter of cutting insulated wire W respectively, peel off the cutter of the insulating barrier of the leading section of electric wire W and peel off the cutter of insulating barrier of rearward end of electric wire W.
Like this, be provided with in this cable processing apparatus 1 as above this carry out in the course of work of electric wire process for the various machines be arranged on day plate 11 ~ 17 are kept apart with operating personnel, safety head 2 and switching device thereof.As shown in Figure 1, safety head 2 is formed with four sides above primarily of one, be the rectangle covering of an open lower side, the state being arranged to each machine 11 ~ 17 be arranged on the upper surface of workbench 10 all to cover is (with reference to the chain-dotted line in Fig. 1.Claim this state to be the closed condition of lid below), therefrom with each machine 11 ~ 17 for being isolated object, the operating personnel of they and this cable processing apparatus 1 are kept apart.Here, if be made up of each face of described safety head 2 parts such as with the transparency, even if so allowing safety head 2 become when each machine 11 ~ 17 covers by closed condition, also can the visual each machine 11 ~ 17 of this safety head 2 be passed through, considering it is preferred way from operation aspect.This safety head 2 is the large-scale lids all covered by the upper surface of workbench 10, primarily of forming the plate-shaped member with the transparency in each face and the frame formation in order to fix these plate-shaped members, being the lid of heavier-weight, illustrating omission in detail.
Safety head 2 is configured to: when cable processing apparatus 1 is idle, for carrying out maintenance etc. to described each machine 11 ~ 17 and as shown in solid lines in fig. 1, described safety head 2 can be made to move upward from its closed condition, the state that allows each machine 11 ~ 17 expose (following, also to claim this state to be the open mode of lid).That is, not to be that armrest is dynamic carry out in safety head 2 lifting in the vertical direction, but utilize switching device 3 automatically to carry out.
As shown in Figure 1, Figure 3, switching device 3 comprises the cylinder 31,31 that is attached at for a pair and safety head 2 allows this safety head 2 be elevated and the air as working fluid is supplied each cylinder 31,31 and the supply circuit 4 of being discharged from each cylinder 31,31 by air.
In this embodiment, cylinder 31 is the unidirectional drive cylinders that air only can be supplied the side of piston, and the piston rod 311 doing linear reciprocation movement exists only in the side of cylinder 31.As shown in Figure 1, this cylinder 31 to be arranged on the upper surface of workbench 10 and described front side presses solidly machine 15 and rear side presses solidly near machine 16, the state that its cylinder axis is established along the vertical direction.The leading section of the piston rod 311 of each cylinder 31 is fixed on safety head 2, safety head 2 is configured to: safety head 2 rises along with vertical upwards elongation of piston rod 311 being in contraction state, safety head 2 is switched to open mode by from closed condition, and, as described later, safety head 2 is by the weight of himself, and decline along with vertical the contraction down of piston rod 311 being in elongation state, safety head 2 is switched to closed condition by from open mode.
One of in Fig. 3-5 shown in example, supply circuit 4 comprises and omits the main supply road 41 that illustrated air supply source is communicated with and the manual operating valve 42 be located on this main supply road 41.The valve that operating valve 42 is a kind of lifting in order to carry out safety head 2 and is operated by the operating personnel of operation cable processing apparatus 1.As shown in Figure 1, this operating valve 42 is arranged on the workbench 10 of cable processing apparatus 1.Supply circuit 4 is switched to following two states by operating valve 42, namely in a first state, the upstream side on main supply road 41 and downstream is connected with each other, and air is supplied each cylinder 31 (with reference to Fig. 3); In a second state, cut off main supply road 41 and the air from each cylinder 31 is discharged to (with reference to Fig. 4) in air.
The downstream branch on main supply road 41, and be connected on each cylinder in described a pair cylinder 31,31, each branch road 43 is provided with speed control valve 44.The elongation of the piston rod 311 of cylinder 31 and the rising or falling speed of contraction speed or even safety head are adjusted to the speed of regulation by this speed control valve 44.
The downstream of each branch road 43 is connected to the cylinder cap side (side that piston rod is not outstanding) of cylinder 31, so, when air being fed to cylinder 31 by main supply road 41 with each branch road 43, this piston rod 311 just can extend, as mentioned above, safety head 2 rises.On the other hand, as described later in detail, when air being discharged from cylinder 31 by the handover operation to operating valve 42, piston rod 311 just can shrink under the effect of the weight of safety head 2, and as mentioned above, safety head 2 declines.
Branch road 43 is also provided with the pressure sensor 45 detecting air pressure, this pressure sensor 45 is configured to: when judging that according to the air pressure on branch road 43 pressure has exceeded threshold value (pressure is lower than the threshold value of regulation) of regulation, just output signal (connection), details are aftermentioned.
The magnetic valve 46 of the air of changeable supply cylinder 31 is also provided with between the downstream (that is, the difference position of branch road 43) and operating valve 42 on main supply road 41.The valve of abnormal condition that this magnetic valve 46 is a changeable normal condition for described operating valve 42 and described difference position being coupled together and is coupled together with described difference position by the bypass 47 being set to operating valve 42 described in bypass.In normal state, that is, as described later, when when safety head 2 is elevated, it is not interfered with barrier etc., described magnetic valve 46 is set to normal condition.When being set as when magnetic valve 46 is in normal condition like this and by operating valve 42 for gaseity, air is supplied to each cylinder 31, and safety head 2 rises, as shown in Figure 3.On the other hand, when magnetic valve 46 is in normal condition like this and when allowing operating valve 42 be in exhaust condition, air is discharged by from each cylinder 31, and safety head 2 declines, as shown in Figure 4.Like this, utilizing just can the lifting of manual control safety head 2 to the handover operation of operating valve 42.
In contrast, when magnetic valve 46 is in abnormal condition, because difference position is connected with bypass 47 as shown in Figure 5, so the state of unattended operation valve 42 how, that is, exactly when operating valve 42 is in exhaust condition, air also can through bypass 47 supply cylinder 31.Therefore, when in safety head 2 is along with the process such as declined to the handover operation of operating valve 42, magnetic valve 46 is switched to abnormal condition from normal condition, by air being supplied each cylinder 31, piston rod 311 just reverse movement.That is, safety head 2 just rises.In addition, the structure of supply circuit 4 is not limited to the structure shown in Fig. 3-Fig. 5, can also adopt other suitable structure.
Magnetic valve 46 is configured to be controlled by control circuit 5.Described pressure sensor 45 is connected on this control circuit 5, and automatic switch 32 is also connected on this control circuit 5.Here, arrange automatic switch 32 to any one (or two) cylinder 31 described, this automatic switch 32 is one when piston rod 311 shrinks, in other words, when safety head 2 is in closed condition, and output signal (connection) switch.Control circuit 5 is according to the output Controlling solenoid valve 46 of the output of these pressure sensors 45 and automatic switch 32.
Shown in Fig. 6 is the example of a structure of control circuit 5.In the figure, symbol 55 representative is applied with the power line of the DC voltage of regulation, and symbol 56 represents earth connection.This control circuit 5 roughly by comprise pressure sensor 45 pressure detection circuit portion 51, described magnetic valve 46 switched to the very circuit part 52 of abnormal condition, comprise the cylinder location testing circuit portion 53 of described automatic switch 32 and the involution circuit part 54 that allows described magnetic valve 46 revert to normal condition is formed.
In pressure detection circuit portion 51, T1, relay is connected on pressure sensor 45.As mentioned above, when the air pressure on branch road 43 exceedes the threshold value of regulation, output signal T1 by pressure sensor 45, relay is just energized.The T1a switch (relay tip) be arranged in unusual circuit part 52 is connected along with the energising of T1 relay.
On the other hand, in cylinder location testing circuit portion 53, automatic switch 32 is connected with K1 relay, as mentioned above, when piston rod 311 shrinks, outputed signal by automatic switch 32, K1 relay is just energized.The K1b switch (relay tip) be located in unusual circuit part 52 is connect under normal circumstances, and this K1b switch disconnects along with the energising of K1 relay.
So, in unusual circuit part 52, after described T1a switch and K1b switch are all connected, magnetic valve 46 just switches to abnormal condition.That is, magnetic valve 46 (switch T1a connects) when safety head 2 is not closed condition (K switch 1b connection) and air pressure on branch road 43 exceedes the threshold value of regulation can switch to abnormal condition.
Involution circuit part 54 is provided with manually operated reset switch 57, and carry out making operation to this reset switch 57, magnetic valve 46 is switched to normal condition.Therefore, this reset switch 57 is one after magnetic valve 46 described above becomes abnormal condition, the switch operated by operating personnel to allow described magnetic valve 46 return normal condition.
Next, be described with reference to the working condition of accompanying drawing to the switching device of structure safety head 2 as above.First, when allowing the safety head 2 being in closed condition rise, operating operating valve 42 by operating personnel and this operating valve 42 is switched to for gaseity.Now magnetic valve 46 is in normal condition.So, air from (such as adding what main power source just can work in advance) air supply source supplies each cylinder 31 through main supply road 41, operating valve 42, magnetic valve 46 and each branch road 43, and the piston rod 311 of each cylinder 31 extends (with reference to Fig. 3) therefrom.Its result, the safety head 2 of closed condition rises, towards open mode change (solid line with reference in Fig. 1).Here, such as, non-return valve can be located on supply circuit 4, even if stop air supply, also keep the air pressure in cylinder 31, made safety head 2 stay open state.
When allowing the safety head 2 being in open mode decline, operate operating valve 42 by operating personnel, so that this operating valve 42 is switched to exhaust condition.Now magnetic valve 46 is in normal condition.Therefore, as shown in Figure 4, because the air in cylinder 31 is discharged in air through each branch road 43, magnetic valve 46 and operating valve 42, so piston rod 311 shrinks by the weight of safety head 2, safety head 2 declines.In addition, rapid escape valve can also be set on branch road 43, air is discharged therefrom.
Here, shown in Fig. 7 (a) He Fig. 7 (b) is the result of air pressure value in the detected process declined at safety head 2 on branch road 43.Shown in Fig. 7 (a) is the situation do not declined from open mode towards closed condition with interfering with barrier etc. at safety head 2.As shown in the drawing, when safety head 2 does not interfere with barrier etc., air pressure is certain value substantially in the decline process of safety head 2.So air pressure can not exceed the threshold value (less than threshold value) set in advance, and as mentioned above, pressure sensor 45 would not output signal, so magnetic valve 46 can not be switched to abnormal condition.Its result, safety head 2 drops to lowermost position and puts and become closed condition.In addition, when safety head 2 drop to lowermost position put and become closed condition time, air pressure can exceed the threshold value set in advance, but because automatic switch 32 connect, K switch 1b disconnects, so magnetic valve 46 can not be switched to abnormal condition (with reference to Fig. 6).
In contrast, be safety head 2 air pressure when interfering with barrier etc. shown in Fig. 7 (b).When safety head 2 interferes with barrier etc., barrier becomes the resistance that safety head 2 declines, and air pressure will change.Therefore air pressure exceedes the threshold value (being less than threshold value) of regulation.In this case, because pressure sensor 45 outputs signal, so switch T1a connects (now, because automatic switch 32 disconnects, so K switch 1b connects), magnetic valve 46 switches to abnormal condition (with reference to Fig. 5, Fig. 6).As shown in Figure 5, if magnetic valve 46 switches to abnormal condition, even if then operating valve 42 is in exhaust condition, each cylinder 31 also can be supplied to, so piston rod 311 extends through bypass 47 from the air of air supply source.That is, the reverse movement of safety head 2 in decline and rising, safety head 2 becomes open mode.So, when the safety head 2 in declining is with when such as operating personnel interfere, just can prevent operating personnel from being clamped in possible trouble by safety head 2 by the reverse movement of safety head 2.In addition, when safety head 2 become under the action of such safety device after open mode, this safety head 2 to be switched to closed condition time, by carrying out making operation to reset switch 57, allow magnetic valve 46 involution be normal condition.By allowing operating valve 42 become exhaust condition like this, safety head 2 just can be allowed to decline.
In the switching device 3 of safety head 2 under this structure, supplying air and detecting from the change of the pressure the supply circuit 4 that cylinder 31 is discharged the interference situation of safety head 2 with barrier by detecting.Therefore, the interference situation of direct-detection safety head 2 and barrier, the sensor such as area sensor, limit switch, Proximity Sensor just do not needed, further, when being configured with such sensor the detection Dead Core Problems of issuable sensor also can not there occurs.That is, no matter barrier in which position and safety head 2 interferes, this barrier all can become the resistance of safety head 2 down maneuver such when, the air pressure on supply circuit 4 can change.Such as, in interfering at the downside barrier of the safety head 2 be in decline process and this safety head 2, air pressure on supply circuit 4 can change certainly, be exactly safety head 2 in decline when pressurized is such from the side, the air pressure on supply circuit 4 also can change.Therefore, it is possible to reliable and precision detects the interference situation of safety head 2 and barrier well.And because only can detect the change of air pressure with a pressure sensor 45, can form safety device at an easy rate, be favourable.
Described pressure sensor 45 has a structure that can output signal when air pressure exceedes the threshold value set in advance, even if so make a simple pressure sensor of structure, also precision the interference situation of described safety head 2 and barrier can be detected well as mentioned above.In this case, although safety head 2 move to lowermost position put time, pressure sensor 45 also can output signal, but this output signal does not represent and there occurs interference, therefore, or this pressure sensor 45 to be combined use with the automatic switch 32 of the position detecting cylinder 31, reliably could get rid of error detection, thus interference accuracy of detection can be made to improve.In addition, the position of the piston rod 311 in cylinder 31, is not limited to be detected by automatic switch 32, such as limit switch, Proximity Sensor etc. can also be utilized to detect.Under this structure, do not allow safety device work when safety head 2 moves to when lowermost position is put, so safety head 2 be positioned at lowermost position put time, can form certain gap between its lower end and the upper surface of workbench 10, the finger of such as operating personnel can not be jammed the sizeable gaps such as so large gap.
(other embodiment)
In addition, under said structure, when detecting that safety head 2 and barrier there occurs interference, allow the reverse movement of safety head 2, but in addition, safety head 2 also can be allowed to stop.This can be realized by the structure changing described magnetic valve 46.
Under said structure, using the pressure of the air on supply circuit 4 as detected parameters, but be not limited to this, can also using the flow of the air on supply circuit 4 as detected parameters.That is, in the process that safety head 20 declines, the flow of air is necessarily constant under normal circumstances, but when safety head 2 and barrier there occurs interference time, flow the same as pressure also can change.It can thus be appreciated that, by detecting the change of flow, also just can precision well the interference situation of safety head 2 and barrier be detected.Here, flow detection sensor can be arranged in than operating valve 42 also under suitable position, downstream on (in addition, as mentioned above, when being provided with rapid escape valve, preferably flow sensor is located on the position of this rapid escape valve).And, can also be that the suitable parameter relevant to the air pressure on supply circuit 4 or the suitable parameter relevant with flow are detected.
Under said structure, allow control circuit 5 be configured to contain the hardware-type structure of relay, but moreover, control circuit can also be allowed to be software-type circuit processor and software combined.As long as this circuit is accomplished, according to the processor of control program work according to the signal from pressure sensor 45 with judge whether two signals are output from the signal of automatic switch 32, when two signals are all output, export the signal being used for magnetic valve 46 being switched to abnormal condition.Be combined such software-type circuit and the pressure sensor such as exporting the air pressure value on supply circuit 4 seriatim, be convenient to the rate of change of the detected pressure value calculating this sensor.As shown in the example in Fig. 7 (b), when safety head 2 and barrier there occurs interference, rate of change may become greatly due to force value change, therefore, can when the rate of change of force value exceed the threshold value of regulation, detection safety head 2 and barrier there occurs interferes this situation.And, in such software-type circuit, described operating valve 42 can also be allowed to be configured to magnetic valve, by this circuit controls magnetic valve.That is, can be switched the state of the operational circumstances of such as console switch to described magnetic valve, with the lifting of handover security lid 2 according to operating personnel by described circuit.
Under said structure, the signal of telecommunication of the variable quantity of the air pressure on supply circuit 4 as pressure sensor 45 is taken out, but in addition, this situation of threshold value that the air pressure on supply circuit 4 can also be exceeded regulation is taken out as rote.In this case, this rote is passed to control valve (valve corresponding to described magnetic valve 46) through such as chain mechanism, and this state is switched, just can realize the reverse movement of safety head 2.
Under said structure, make cylinder 31 for unidirectional drive cylinder, but in addition, this cylinder can also be allowed to be bi-directional drive cylinder.In this case, be also by the air pressure of detection in the course of work of cylinder 31 on supply circuit or the situation of change of flow, detect the interference situation of safety head 2 and barrier.As the execution unit allowing safety head 2 be elevated, be not limited to cylinder 31, this execution unit can also be such as oil cylinder.That is, the working fluid that supply circuit 4 supplies is not air, but working oil.
Here, for the safety head 2 of cable processing apparatus 1, this technology is described, but technology disclosed herein is not limited to the safety head 2 of cable processing apparatus 1, technology disclosed herein can be widely used in places such as being mainly included in factory carry out manufacturing, process, be shaped and process etc. manufacturing installation, processing unit (plant) and working equipment etc. industrial equipment in as safety device etc.As shown in Figure 1, in this industrial equipment, the covering (lid) that the part that safety head is not limited to keep apart with operating personnel is all surrounded, safety head can also be such as door leaf (door), shutter.
Like this, as the slider of the general name of lid, door and shutter etc., be not limited to said structure and be elevated (movement) along the vertical direction, this slider can also be the structure of an edge such as horizontal direction slippage.It can be such as the such structure that can launch or roll of shutter.As long as the action situation of execution unit is done according to the motion conditions of slider and is suitably set.Therefore, be not limited to piston rod the same as said structure as execution unit and do linearity and move back and forth, can also adopt and centered by the axle specified, carry out the such execution unit of oscillating motion according to the supply of working fluid and non-supply.
Industrial applicibility
In sum, the switching device of slider disclosed herein, realizes for cheapness the interference situation detecting reliably and accurately slider and barrier, thus the safety device that reliably can carry out the stopping of slider or reverse movement is very useful.
Claims (5)
1. a switching device for slider, is characterized in that:
The switching device of this slider comprises:
Slider, what this slider specified in industrial equipment is isolated between object and operating personnel, is used for being isolated object and described operating personnel are mutually isolated opens by described,
Cylinder execution unit, this cylinder execution unit is bound up on described slider, fluid pressure is utilized to allow described slider be isolated closed condition that object and described operating personnel isolate to described and moving described being isolated between open mode that object and described operating personnel do not isolate
Supply circuit, this supply circuit is connected with described cylinder execution unit, working fluid is supplied this cylinder execution unit,
Functional unit, this functional unit is arranged in described supply circuit, and this functional unit is by controlling to allow the work of described cylinder execution unit to the supply of the described working fluid of described cylinder execution unit, to ensure that described slider moves between described closed condition and open mode
Detection part, the parameter relevant with the pressure of described working fluid or flow is detected at the assigned position place of this detection part on described supply circuit, and
Control assembly, by slider described in the described functional unit of operation from described open mode move to the parameter detected by described detection part the process of described closed condition had a change time, this control assembly supplies described working fluid to described cylinder execution unit, to ensure the reverse movement of described slider.
2. the switching device of slider according to claim 1, is characterized in that:
Described control assembly is configured to: when the value of the parameter detected by described detection part has exceeded the threshold value set in advance, and this control assembly supplies described working fluid to described cylinder execution unit, to ensure the reverse movement of described slider.
3. the switching device of slider according to claim 2, is characterized in that:
The switching device of this slider also comprises: detect the condition detection portion that described slider is not described closed condition or described open mode,
Described control assembly is configured to: detected described slider by described condition detection portion be not closed condition or this situation of open mode and the value of the parameter detected by described detection part has had a change time, this control assembly supplies described working fluid to ensure the reverse movement of described slider to described cylinder execution unit.
4. the switching device of slider according to claim 1, is characterized in that:
Described control assembly is configured to: when the rate of change of the parameter detected by described detection part has exceeded the threshold value set in advance, and this control assembly supplies described working fluid to ensure the reverse movement of described slider to described cylinder execution unit.
5. the switching device of the slider any one of claim 1 to 4 described in claim, is characterized in that:
Described slider is configured to be elevated along the vertical direction,
Described cylinder execution unit has piston rod, and this piston rod extends and contraction with discharge in the vertical direction along with the supply of described working fluid, and allows described slider be elevated between open mode and closed condition,
Described control assembly is configured to: when the value of the parameter just detected by described detection part towards the process of closed condition movement from described open mode at described slider has had change, this control assembly supplies described working fluid to ensure the reverse movement of described slider to described cylinder execution unit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010024102A JP5616646B2 (en) | 2010-02-05 | 2010-02-05 | Safety cover opening and closing device |
| JP2010-024102 | 2010-02-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102152164A CN102152164A (en) | 2011-08-17 |
| CN102152164B true CN102152164B (en) | 2015-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010616274.5A Active CN102152164B (en) | 2010-02-05 | 2010-12-30 | Isolator switching device |
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| Country | Link |
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| JP (1) | JP5616646B2 (en) |
| CN (1) | CN102152164B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6346163B2 (en) | 2015-12-18 | 2018-06-20 | ファナック株式会社 | Machine tool with door opening and closing device |
| JP6841731B2 (en) * | 2017-07-03 | 2021-03-10 | 新明和工業株式会社 | Elevating safety cover device and electric wire processing device equipped with it |
| WO2021090396A1 (en) * | 2019-11-06 | 2021-05-14 | 株式会社 エー・アンド・デイ | Balance scales windshield |
| WO2022059101A1 (en) * | 2020-09-16 | 2022-03-24 | 株式会社 エー・アンド・デイ | Windshield for electronic balance |
| JP7402596B2 (en) | 2020-12-03 | 2023-12-21 | 株式会社エー・アンド・デイ | Windshield for electronic balances |
| CN113579834B (en) * | 2021-08-20 | 2022-06-28 | 中国机械总院集团海西(福建)分院有限公司 | Numerical control machine tool with automatic cleaning and collecting functions |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1559087A (en) * | 1975-12-01 | 1980-01-16 | Norton Tool Co Ltd | Machine tool guards |
| JPH05280250A (en) * | 1992-03-31 | 1993-10-26 | Nippondenso Co Ltd | Automatic opening and closing device for vehicle rear door |
| JPH0642044U (en) * | 1992-11-24 | 1994-06-03 | オークマ株式会社 | Automatic door with sub door |
| JPH09229873A (en) * | 1996-02-21 | 1997-09-05 | Sumitomo Metal Ind Ltd | Method and apparatus for detecting abnormality of bite |
| JP3780745B2 (en) * | 1999-04-28 | 2006-05-31 | 日産自動車株式会社 | Heme processing method and hem processing apparatus |
| JP2001162482A (en) * | 1999-12-08 | 2001-06-19 | Shin Caterpillar Mitsubishi Ltd | Scatter prevention device for machine tool |
| WO2005087432A1 (en) * | 2004-03-12 | 2005-09-22 | Mitsubishi Denki Kabushiki Kaisha | Rotary work lifter and processing machine |
-
2010
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2011161531A (en) | 2011-08-25 |
| JP5616646B2 (en) | 2014-10-29 |
| CN102152164A (en) | 2011-08-17 |
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