CN104907878A

CN104907878A - Lock preventing device

Info

Publication number: CN104907878A
Application number: CN201510103615.1A
Authority: CN
Inventors: 荻岛康则
Original assignee: Toshiba Machine Co Ltd
Current assignee: Shibaura Machine Co Ltd
Priority date: 2014-03-11
Filing date: 2015-03-10
Publication date: 2015-09-16
Anticipated expiration: 2035-03-10
Also published as: JP6297366B2; JP2015172270A; CN104907878B

Abstract

A lock preventing device 6 for a working door 1 which has a door part 3 with either a door key 52 or a slot 53 and a frame part 2 with the other one is disclosed. The lock preventing device has a quasi-locking position Ps with a key not inserted in the slot and a full-locking position Pc with door part completely closed and the key inserted in the slot. The lock preventing device comprises a key through hole 69 in either the door part or the frame part, case 31 for the other one of the door part or the frame part, a lock-preventing key 68 which is inserted in the key through hole from the opposite side of the case, and of which the front end is guided in the case, a lock-preventing mechanism which prevents the door part 3 from moving towards the full-locking position from the quasi-locking position, and can be set and unlocked by the lock-preventing key, and a key restricting mechanism. When the lock-preventing mechanism 67 is released, the lock-preventing key is restricted in such a manner of penetrating through the key through hole.

Description

Lock anti-locking apparatus

Technical field

The present invention relates to and prevent from closing the anti-locking apparatus of locking inside operation door.

Background technology

In large-scale lathe, its housing or shell are provided with the operation door of coming in and going out for operating personnel.In addition, the roll guard surrounded around the place operated by mechanical device is also arranged the operation door being used for operating personnel and coming in and going out.

In these operation doors, in order to prevent operating personnel in the running from surprisingly invading, and safety switch etc. is utilized to lock.The locking of such operation door suitably utilizes the operation of switch near the operation of the key using locking device, operation door and the operation etc. on the control panel of lathe.

When utilizing safety switch to carry out the locking of such operation door, under the state sometimes shut up operating personnel, locking by mistake under the state namely staying the inner side of operation door operating personnel.So propose the anti-locking apparatus of locking (reference literature 1: Japanese Patent No. 4520709 publication) considering to prevent from shutting up.

In the anti-locking apparatus of the locking of document 1, the door key given prominence to from reveal is inserted into when the locking of operation door in the slot of frame side, by the door key constraint that will be accommodated in slot, operation door is locked in the lockout condition.And then, use and can enter until the movable cover of state that slot is covered, make when quilt cover covers, actuator can not be inserted in slot and prevent from locking, make to occur the situation that operating personnel shuts up thus.

But, in the anti-locking apparatus of the locking of document 1, although illustrate the situation that will lock the cover padlock that prevents and lock further, do not carry out and the associating of other equipment classes, can easily move under latch-release state.

That is, enter into the state of inner side of operation door operating personnel under, likely operation door is closed by mistake and locks by other operating personnel.

Summary of the invention

The object of this invention is to provide a kind of can reliably preventing and close the anti-locking apparatus of locking inside operation door.

The anti-locking apparatus of locking of the present invention is a kind of anti-locking apparatus of locking of operation door, described operation door has the door part of the one party being formed with door key or slot and is formed with the members of frame of the opposing party of above-mentioned door key or above-mentioned slot, there is above-mentioned door key and be not inserted in the accurate locked position of coupler in above-mentioned slot and above-mentioned door part is closed completely and above-mentioned door key is inserted in the full cut-off lock position in above-mentioned slot, it is characterized in that, comprise: key through hole, be formed in the one party of above-mentioned door part or above-mentioned members of frame; Box, is formed on the opposing party of above-mentioned door part or above-mentioned members of frame; Locking prevents key, and run through from the opposition side with above-mentioned box and insert above-mentioned key through hole, front end is directed in above-mentioned box; Prevent blocking mechanism, limit above-mentioned door part and move to above-mentioned full cut-off lock position from above-mentioned accurate locked position of coupler, and can prevent key from setting by above-mentioned locking and remove; Key constraint mechanism, when by above-mentioned prevent blocking mechanism from removing time, prevent key to be constrained to above-mentioned locking and run through the state be inserted in above-mentioned key through hole.

In such the present invention, usual door part moves to full cut-off lock position and by the locking of operation door.In this condition, by being inserted in slot by door key, the locking of operation door can being confirmed, by becoming the state can permitted in control device, carrying out the running of the lathe of setting place etc.

In this condition, locking prevented key to be inserted into box from key through hole, utilize locking to prevent key from carrying out the constraint of door part and members of frame, so operation door can not be opened.

Locking prevents key owing to being retrained by key constraint mechanism, so can not deviate from from key through hole, thus reliably maintains the state of being closed by operation door.

When operating personnel enters in operation door, the operation locking be inserted in key through hole prevents key, will prevent blocking mechanism from removing, and after being removed by key constraint mechanism, locking is prevented key from extracting from key through hole.Thus, prevent key to the constraint release of door part and members of frame locking, thus operation door can be opened.

By operating personnel, operation door is opened, door key is extracted from slot, removed by the lock-out state (can confirm the locking of operation door, can permit the state of the running of the lathe of setting place etc.) of operation door thus, the mechanical action in operation door is maintained halted state by its result.

Under the state that operation door is opened, utilize and prevent blocking mechanism, prevent door part from moving to full cut-off lock position side from accurate locked position of coupler.Therefore, even if door part will be closed because of misidentification by the third party, or made door part close by external force or vibration etc., door part is also restricted to accurate locked position of coupler, door key can not enter in slot, thus prevents from becoming lock-out state (locking prevents state).

Under locking prevents state, the locking of operation door can not be carried out, the running of the locking of operation door or the lathe of setting place etc. can not be carried out.Such locking prevents state from continuing until operating personnel uses locking to prevent key from will prevent blocking mechanism from removing.

Thus, when entering in operation door, if locking prevents key from extracting and carries by operating personnel, even if then door part will be closed because of misidentification by the third party, or door part will be closed by external force or vibration etc., operation door also can not become lock-out state, thus operating personnel can be prevented to be held in operation door.

When being closed by operation door, locking, after door part is closed to accurate locked position of coupler, prevents key to be inserted in key through hole, will prevent blocking mechanism from removing by operating personnel.Thus, door part exceedes accurate locked position of coupler and moves to full cut-off lock position, thus operation door can be closed completely.If door part is in full cut-off lock position, then door key can enter in slot, thus operation door is switched to lock-out state again.

As mentioned above, in the locked state, because locking prevents key from being retrained by key constraint mechanism, so can not deviate from from key through hole.And, locking due to the side being restrained to door part and members of frame prevents from key to be in running through the state be inserted in the key through hole of the opposing party being formed at door part and members of frame, even if so door part is opened from full cut-off lock, also in the scope of key through hole, prevent key locking locking, thus prevent from opening larger than accurate locked position of coupler.And then, by locking being prevented key to be constrained in operation door, make visually also can confirm to be in the lock state.

Like this, in the present invention, under the state that operation door is closed, locking being prevented key to insert from key through hole by means of only operating personnel and operate, lock-out state and the locking that just can switch operation door prevent state.

Further, when entering in operation door, carrying locking by operating personnel and preventing key, even if operation door is closed, also can not be identified as lock-out state mistakenly.

Thus, carry the situation that the locking of extracting from key through hole prevents key from entering in operation door operating personnel, even if operation door is closed, this operation door can not be made to become lock-out state, operating personnel can be prevented to be held in the inside.

In addition, as box, general metal housing can be utilized, and the structure having under casing shape with rectangular aperture can be utilized.

Also can arrange the panel of its closure of openings on box, preferably arrange on this panel and make shutter be exposed to outside opening and prevent the opening of key for inserting locking.

Prevent key as locking, as described later, following locking can be utilized to prevent key: there is the axle that can run through and insert key through hole, and be formed on this axle and the above-mentioned structure preventing blocking mechanism or key constraint mechanism from coordinating.

In the present invention, can be following formation: the above-mentioned blocking mechanism that prevents has: shutter, can along from preventing locked position of coupler to moving the mobile axis of locked position of coupler, when be in above-mentioned prevent locked position of coupler time, engage with the above-mentioned door key being in above-mentioned accurate locked position of coupler, above-mentioned door key can be prevented to the insertion of above-mentioned slot, and when being in above-mentioned can the interference with above-mentioned door key during locked position of coupler; Force application part, exerts a force to the above-mentioned locked position of coupler side that prevents to above-mentioned shutter; With prevent locking maintain mechanism, limit above-mentioned shutter and can move locked position of coupler side to above-mentioned, and can by above-mentioned locking prevent key set and remove.

Here, as the structure that shutter engages with door key, the mobile route that shutter can be utilized to enter into door key stops towards the formation of the movement of slot.Now, shutter can utilize abut with door key formation, by formation etc. locking for a part for door key, also can be the formation of opening portion covering slot.

As key constraint mechanism, can be move at shutter can retrain the formation that locking prevents key under the state of locked position of coupler side relative to box.As such key constraint mechanism, can use and utilize the active force of force application part to prevent the part for key from clamping and the structure etc. of fixing locking.

In such the present invention, usually utilize force application part to be maintained by shutter and prevent locked position of coupler side.In this condition, utilize shutter by door key at accurate locked position of coupler place moving-limiting, stop the insertion to slot, and prevent from door part from also exceeding accurate locked position of coupler moving to full cut-off lock position.On the other hand, be inserted in key through hole locking being prevented key after also preventing locking from maintaining mechanism releases, force application part is pushed, thus shutter is moved to locking license position.Thus, the door key of operation door can not enter in slot interferingly with shutter, thus can become lock-out state.

In the present invention, can be following formation: the above-mentioned blocking mechanism that prevents has: stop part, can along from preventing locked position of coupler to moving the mobile axis of locked position of coupler, when be in above-mentioned prevent locked position of coupler time, the above-mentioned door part being in above-mentioned accurate locked position of coupler is engaged with above-mentioned members of frame, above-mentioned door part can be prevented to the movement of above-mentioned full cut-off lock position, and when be in above-mentioned can locked position of coupler time, above-mentioned door part can be removed with the engaging of above-mentioned members of frame; Force application part, exerts a force to the above-mentioned locked position of coupler side that prevents to above-mentioned stop part; With prevent locking maintain mechanism, limit above-mentioned stop part and can move locked position of coupler side to above-mentioned, and can by above-mentioned locking prevent key set and remove.

Here, as the structure that stop part makes door part engage with members of frame, the structure that the stop part be arranged on members of frame can be utilized to abut with door part or be arranged on the structure that the stop part on door part abuts with members of frame.

As such structure, the mobile route that stop part can be used to enter into door part stop door part to the formation of the movement of full cut-off lock position.Now, stop part both can directly be connected in the main body of door part or door part, also can be connected on abutting plate be fixed on door part or members of frame etc.

As key constraint mechanism, can be move at stop part can retrain the formation that locking prevents key under the state of locked position of coupler side relative to box.As such key constraint mechanism, can adopt and utilize the active force of force application part to prevent the part for key from clamping and the structure etc. of fixing locking.

In such the present invention, usually utilize force application part to be maintained by stop part and prevent locked position of coupler side.In this condition, utilize stop part by door part at accurate locked position of coupler moving-limiting, prevent from exceeding accurate locked position of coupler and move to full cut-off lock position.On the other hand, being inserted in key through hole locking being prevented key after also preventing locking from maintaining mechanism releases, making by being pushed by force application part shutter move to locking license position.Thus, the door key of operation door can not enter in slot interferingly with shutter, thus can become lock-out state.

In the present invention, following formation can be utilized: the above-mentioned pedestal preventing from blocking mechanism to have being accommodated in above-mentioned box, with the guide part guiding said base along above-mentioned mobile axis relative to above-mentioned box, said base exerts a force to the above-mentioned locked position of coupler side that prevents relative to above-mentioned box by above-mentioned force application part, the above-mentioned locking maintenance mechanism restriction said base that prevents can move locked position of coupler side to above-mentioned relative to above-mentioned box, and can prevent key from setting by above-mentioned locking and remove, when said base be in relative to above-mentioned box to above-mentioned can locked position of coupler side move state time, above-mentioned key constraint mechanism retrains above-mentioned locking and prevents key.

In such the present invention, can be following structure: by utilizing base support shutter or stop part, making force application part, preventing locking from maintaining mechanism and key constraint mechanism exerts a force to pedestal or mobile restriction etc.That is, use pedestal, shutter or stop part and force application part can be obtained, prevent from locking from maintaining the functional of mechanism and key constraint mechanism etc. associating.Further, by utilizing guide part guide base, other that can carry out shutter swimmingly moves.

As pedestal, the plate-shaped member of the inside that can be received into box can be used, such as, can use the sheet material etc. with the profile slightly less than the inside bottom surface of box.

On pedestal, also opposed a pair or four limits in the edge of its sheet material all can be bent and erect from sheet material, forming the sleeve that can configure along the inner peripheral surface of box thus.

As guide part, can use be fixed on box bottom surface on and extend along mobile axis and arrive the pin near opening, be inserted in the hole of pedestal by making this pin run through, and can guide along mobile axis.

In the guide part using such pin, by pedestal with run through the lining that patchhole arranges tubular coaxially, and along mobile axis with predetermined length and pin contacts, pedestal can be maintained desired intersecting angle relative to the posture of mobile axis.

Or, also can form the rib or track that extend along mobile axis on the medial surface of box, make the edge of pedestal slidingly contact with it to guide.

And then, the edge of pedestal and the medial surface of box also can be made to slidingly contact to guide.Particularly when use above-mentioned define the pedestal of sleeve, easily between the medial surface of box, form guide part, contacted with predetermined length along mobile axis with the medial surface of box by sleeve, pedestal can be maintained desired intersecting angle relative to the posture of mobile axis.

When such formation, by pasting thin slice or the band of low friction material on the inner peripheral surface of box or the surface of sleeve in advance, can slide swimmingly.

And then, be not limited to the medial surface of box, the corner inside box also can be utilized as the groove bar in mobile axis direction, the bight of pedestal is engaged with it and guides.In this case, if also the bight of pedestal formed sleeve-shaped erect part, then for pedestal posture maintain be preferred.

As force application part, the compression helical spring be wound on coaxially on above-mentioned pin can be used.

In addition, as force application part, also can to utilize and above-mentioned pin or targeting part are turned up the soil the Compress Spring be arranged between pedestal and the bottom surface of box.

Or, also extension spring can be set between the inner surface of box and the surface of pedestal or between above-mentioned panel and pedestal.

As these springs, be not limited to the mechanical type spring formed by metal lines or sheet material, also can utilize the bounce of block or the tension force of wire rod that use elastomeric material.

In the present invention, can be following formation: above-mentioned locking prevents key to have key member in front end, the above-mentioned locking maintenance mechanism that prevents comprises cylinder lock and movement restricting member, described cylinder lock is arranged in said base, above-mentioned key member can be inserted, and have the bolt can retreated on the direction intersected with above-mentioned mobile axis, described movement restricting member is fixed on above-mentioned box, can abut with the above-mentioned bolt got the hang of locked position of coupler side from above-mentioned.

In such the present invention, as cylinder lock and key member, the door lock & key that market is sold can be used.

Further, as movement restricting member, the mobile restriction pin that abuts with bolt with front end can be utilized or there is the connecting hole that above-mentioned bolt can insert or the mobile restriction plate engaging hole.

In the present invention, can be following formation: above-mentioned locking prevents key to have the bar extended to the direction intersected with above-mentioned mobile axis, above-mentioned key constraint mechanism comprises retainer and one-way clutch, described retainer is fixed on above-mentioned box, can abut with the above-mentioned locked position of coupler side that prevents of above-mentioned bar, described one-way clutch is formed between above-mentioned retainer and above-mentioned bar, when above-mentioned bar to above-mentioned can locked position of coupler side move and abut with above-mentioned retainer time above-mentioned bar is passed, and when above-mentioned bar to above-mentioned prevent locked position of coupler side from moving and abut with above-mentioned retainer time, limit passing of above-mentioned bar.

In such the present invention, as one-way clutch, to be formed except the front end that can be used in bar and only can to the baffle plate preventing locked position of coupler side from rotating or the front end being formed in retainer and only can to can except the baffle plate of locked position of coupler side rotation, retainer can also be made to be can to the latch bolt retreated in the direction that mobile axis intersects or can to retreat and front end tilts to make the plunger preventing locked position of coupler side from shortening equally, make to can the movement of locked position of coupler side bar through and by preventing the bar of locked position of coupler side movement locking.

In the present invention preferably, above-mentioned locking prevents from key to have running through the axle be inserted in above-mentioned key through hole and the handle be connected on above-mentioned axle, and above-mentioned key through hole can cover and locking by above-mentioned handle.

In such the present invention, handle can be used easily to operate, even and if when key through hole being expanded in order to make locking prevent the bar of key from passing, also locking can be utilized to prevent the handle of key from being covered by key through hole, thus can prevent from sandwiching the undesirable conditions such as object in key through hole.

Also can be in the present invention, above-mentioned locking prevents key to have axle, the key member of the bar extended from the above-mentioned direction axially intersected and the front end that is connected to above-mentioned axle, the above-mentioned blocking mechanism that prevents is cylinder lock, be arranged in the one party of above-mentioned door part or above-mentioned members of frame, above-mentioned key member can be inserted, and there is the bolt that can retreat, form stop part, this stop part can along from preventing locked position of coupler to moving the mobile axis of locked position of coupler by above-mentioned bolt, when be in above-mentioned prevent locked position of coupler time, the above-mentioned door part being in above-mentioned accurate locked position of coupler is engaged with above-mentioned members of frame, and above-mentioned door part can be prevented to the movement of above-mentioned full cut-off lock position, and when be in above-mentioned can locked position of coupler time, above-mentioned door part can be removed with the engaging of above-mentioned members of frame, above-mentioned key constraint mechanism is made up of above-mentioned key through hole, this key through hole is the shape that above-mentioned bar can be run through insertion when above-mentioned locking prevents key to be in the specific anglec of rotation.

In such the present invention, cylinder lock can be utilized to form and prevent blocking mechanism, the door lock & key that market can be utilized to sell is implemented simply.

Further, about key member, key through hole and key constraint mechanism, also can be the structure of cylinder list.

In the present invention preferably, have the extension plate be fixed on above-mentioned door part or above-mentioned members of frame, above-mentioned key through hole is formed at above-mentioned extension plate.

In such the present invention, as long as be formed on extension plate by key through hole, extension plate can be easily fixed on door part or members of frame by weld, bond, fastening etc.Key through hole has above-mentioned bar, and when door part is slidingtype, need to have with from full cut-off lock position to the length that the distance of accurate locked position of coupler is corresponding, be difficult to the opening being formed as simple shape.But if be pre-formed key through hole on extension plate, then easily can arrange key through hole on existing door part or members of frame, the subsequent installation to existing device is also easy.

According to such the present invention, a kind of can reliably preventing can be provided to close the anti-locking apparatus of locking inside operation door.

Accompanying drawing explanation

Fig. 1 is the stereogram representing the 1st embodiment of the present invention.

Fig. 2 is the sectional view of the planar configuration representing above-mentioned 1st embodiment.

Fig. 3 is the exploded perspective view of the box inside representing above-mentioned 1st embodiment.

Fig. 4 is the amplification view of the box inside representing above-mentioned 1st embodiment.

Fig. 5 represents that the box of above-mentioned 1st embodiment prevents the stereogram of key with locking.

Fig. 6 represents that the locking of above-mentioned 1st embodiment prevents the top view of key.

Fig. 7 is the amplification view corresponding to Fig. 4 representing the 2nd embodiment of the present invention.

Fig. 8 is the amplification view corresponding to Fig. 4 representing the 3rd embodiment of the present invention.

Fig. 9 is the exploded perspective view corresponding to Fig. 3 representing the 4th embodiment of the present invention.

Figure 10 is the exploded perspective view representing the 5th embodiment of the present invention.

Figure 11 is the sectional view corresponding to Fig. 2 representing the 6th embodiment of the present invention.

Figure 12 is the sectional view corresponding to Fig. 2 representing the 7th embodiment of the present invention.

Figure 13 is the sectional view corresponding to Fig. 2 representing the 8th embodiment of the present invention.

Figure 14 is the sectional view corresponding to Fig. 2 representing the 9th embodiment of the present invention.

Figure 15 is the sectional view corresponding to Fig. 2 representing the 10th embodiment of the present invention.

Figure 16 is the sectional view corresponding to Fig. 2 representing the 11st embodiment of the present invention.

Figure 17 is the sectional view corresponding to Fig. 2 representing the 12nd embodiment of the present invention.

Figure 18 is the sectional view corresponding to Fig. 2 representing the 13rd embodiment of the present invention.

Detailed description of the invention

[the 1st embodiment]

The 1st embodiment of the present invention is represented in Fig. 1 to Fig. 6.

Present embodiment relates to the operation door 1 of heavy duty machine tools, and this operation door 1 is provided with the safety switch 5 of existing structure, and is provided with based on the anti-locking apparatus 6 of locking of the present invention.

Show the major part being provided with the operation door 1 locking anti-locking apparatus 6 in fig. 1 and 2.

Operation door 1 has relative to members of frame 2 opening and closing door part 3 freely.

It is rectangular box-like that members of frame 2 is formed as that operating personnel can pass through in inner side.But in fig. 1 and 2, the door part 3 that illustrate only in members of frame 2 closes the post 4 of side, and other parts eliminate diagram.

Door part 3 is can along the sliding door type of the opening surface movement of members of frame 2, by the front end of door part 3 close to post 4 by operation door 1 locking, leave post 4 and operation door 1 is open by the front end of door part 3.

In operation door 1, door part 3 full cut-off lock status (being in the state of full cut-off lock position Pc) from Fig. 1 shown in double dot dash line can move to open state (being in the state of release position Po) in Fig. 1 shown in solid line through accurate blocking (accurate locked position of coupler Ps).Release position Po is the position that the front end of door part 3 becomes the distance that operating personnel can pass through between the front end of door part 3 and post 4.But when speaking of the open state of operation door 1, when the front end being not limited to door part 3 is in release position Po, if the front end of door part 3 exceedes accurate locked position of coupler Ps and opens, this is also open state.

Operation door 1 is provided with safety switch 5 and based on the anti-locking apparatus 6 of locking of the present invention.

Safety switch 5 has the switch main body 51 be arranged on members of frame 2 and the door key 52 be arranged on door part 3.Switch main body 51 is formed slot 53, and door key 52 is set to, and is inserted in slot 53 when door part 3 is in full cut-off lock position Pc.

Switch main body 51 is provided with not shown sensor, the situation inserting door key 52 can be detected in slot 53.

In operation door 1, when door part 3 is in full cut-off lock position Pc, door key 52 is sufficiently inserted in slot 53, and this state is detected by sensor, detects " blocking " in safety switch 5.

In operation door 1, when door part 3 is opened and extracted in slot 53 by door key 52, this state is detected by sensor, detects " non-blocked state " in safety switch 5.Such non-blocked state except when door part 3 is in full cut-off lock position Pc, namely accurate locked position of coupler Ps or release position Po any one in detect all equally.

Lock anti-locking apparatus 6 to be arranged on the inner side surface of post 4, there is the locking remaining on the height identical with safety switch 5 and prevent apparatus main body 60.On door part 3, the opposed position of apparatus main body 60 is prevented to be formed with key through hole 69 when being in full cut-off lock-bit shield Pc when door part 3 with locking.Preventing key 68 from running through locking through this key through hole 69 is inserted in box 61, the operation that the locking can carrying out thus locking anti-locking apparatus 6 prevents and removes.

Show the locking locking anti-locking apparatus 6 in figs. 3 and 4 and prevent apparatus main body 60.

Locking prevents from apparatus main body 60 from comprising having the box 61 of bottom surface 611 and rectangular box-like cylindrical shell 612, be accommodated in the pedestal 62 in box 61 and cover the panel 63 of opening surface 610 of box 61.

On box 61, near the corner of bottom surface 611, be respectively arranged with guide finger 641, run through respectively in the pilot hole 642 of the corner being inserted in pedestal 62.Guide part 64 is formed by these guide fingers 641 and pilot hole 642.

By this guide part 64, make pedestal 62 can move to opening surface 610 side in the inside of box 61 from side, bottom surface 611.Now, the moving direction of pedestal 62 is the direction along the mobile axis Am specified by guide part 64.

Here, pedestal 62 when being in 611 side, bottom surface of box 61 for can locked position of coupler Se, when being in opening surface 610 side (panel 63 side) of box 61 for preventing locked position of coupler Sd.

Guide finger 641 is equipped with to coaxial helical spring 643 as force application part respectively, and its one end is connected on the bottom surface 611 of box 61, and the other end is connected on the back side of pedestal 62.Be accommodated in the state (running through the state being inserted with guide finger 641 in each pilot hole 642 at pedestal 62) in box 61 at pedestal 62 under, helical spring 643 is compressed between the bottom surface 611 and the back side of pedestal 62 of box 61.Utilize this helical spring 643, opening surface 610 side (panel 63 side) of pedestal 62 towards box 61 is exerted a force, namely from exerting a force towards preventing locked position of coupler Sd side locked position of coupler Se side.

The surface (with the opposition side, bottom surface of box 61) of pedestal 62 is provided with cylinder lock 651.

Cylinder lock 651 has bolt 652 free to advance or retreat.This bolt 652 is by preventing the key member 650(of key 68 to be described in detail later locking) to be inserted in the keyhole 653 of cylinder lock 651 and rotation process, and enter to the direction that the mobile axis Am with pedestal 62 intersects or retreat.

In addition, cylinder lock 651 is such structure: when keyhole 653 is above-below direction (locking described later prevents the bar 663 of key 68 upward), bolt 652 enters, and when keyhole 653 is horizontal direction (locking described later prevents the bar 663 of key 68 for horizontal), bolt 652 retreats.

On pedestal 62, be formed at the position overlapped with the bolt 652 got the hang of and run through patchhole 654.The bottom surface 611 of box 61 is provided with and can runs through patchhole 654 and run through the locking pin 655 of insertion.

Under the state that pedestal 62 is accommodated in box 61, locking pin 655 exposes running through patchhole 654 to run through insertion in the face side of pedestal 62.Here, the length of locking pin 655 is adjusted following state can be obtained.

If the bolt 652 of cylinder lock 651 is in fallback state (state of the solid line of Fig. 4), no matter then pedestal 62 is in that prevent locked position of coupler Sd side or be in can locked position of coupler Se side, locking pin 655 all can not be interfered with bolt 652.

If the bolt 652 of cylinder lock 651 is in get the hang of (state of the single dotted broken line of Fig. 4), then when pedestal 62 be in prevent locked position of coupler Sd side time, locking pin 655 and bolt 652 are not interfered.But, when pedestal 62 along mobile axis Am to can locked position of coupler Se side move time, locking pin 655 is given prominence to significantly in the face side of box 62, locking pin 655 is connected on the back side (with running through patchhole 654 opposite side) of bolt 652, limits pedestal 62 in this condition to can the movement of locked position of coupler Se side.

Thus, when bolt 652 be in get the hang of time, pedestal 62 is prohibited arrival can locked position of coupler Se, and maintains and prevent locked position of coupler Sd side.

Thus, locking pin 655 plays function as movement restricting member of the present invention, utilizes these cylinder locks 651 or locking pin 655 of the present inventionly to prevent locking from maintaining mechanism 65 to form.

On panel 63, the key be formed for making locking prevent key 68 from passing runs through patchhole 632.

It is elongated hole in roughly L-shaped that key runs through patchhole 632, no matter to make locking described later prevent the bar 663 of key 68 or transverse direction can both run through insertion upward.

In addition, when pedestal 62 be in prevent locked position of coupler Sd time, the periphery of the keyhole 653 of cylinder lock 651 runs through patchhole 632 from this key and exposes, and can easily carry out locking the insertion (with reference to Fig. 1, Fig. 3, Fig. 5) of the key member 650 preventing key 68.

In addition, run through at key in the part at the edge of patchhole 632, be provided with the importing guide part 633 of circular arc planar in order to guiding locking prevents the insertion of key 68.

On box 61, be fixed with the retainer 661 of tabular from the medial surface of cylindrical shell 612 towards center.On pedestal 62, be formed with otch 662 in the position corresponding with retainer 661.

About retainer 661, when pedestal 62 be in box 61 can locked position of coupler Se time, retainer 661 is in the face side of pedestal 62, and adjusts its fixed position to become the state of front end towards cylinder lock 651 of retainer 661.

Otch 662 is cut towards cylinder lock 651 by the edge from pedestal 62, be formed as when pedestal 62 from box 61 can locked position of coupler Se enter into and prevent locked position of coupler Sd time allow the position passed through of retainer 661 and shape.

These retainers 661 and otch 662 and locking described later prevent from forming key constraint mechanism 66 of the present invention together with bar 663 grade of key 68.

On pedestal 62, the surface of the opposition side, bottom surface 611 with box 61 is fixed with shutter 671.

Shutter 671 is the plate-shaped members extended from pedestal 62 along mobile axis Am.

As shown in Figure 3 and Figure 5, panel 63 is formed with the slit 631 for making shutter 671 pass through, the front end of shutter 671 is exposed to the outside of panel 63 through slit 631.

When pedestal 62 be in can locked position of coupler Se time, the front end of shutter 671 is the degree of slightly giving prominence to from the surface of panel 63.

When pedestal 62 be in prevent locked position of coupler Sd time, the front end of shutter 671 is given prominence to significantly from the surface of panel 63.

As depicted in figs. 1 and 2, pedestal 62 be in prevent locked position of coupler Sd and shutter 671 from the state that panel 63 is given prominence to significantly, shutter 671 is configured in by door key 52 on the path that slot 53 inserts, and door key 52 is blocked the insertion prevented to slot 53 by shutter 671.In this condition, it is locking that door key 52 is opened and closed device 671, and door part 3 can not be closed towards full cut-off lock position Pc (preventing blocking) further.

On the other hand, pedestal 62 be in can locked position of coupler Se and shutter 671 be the degree of slightly giving prominence to from panel 63 state, shutter 671 is not interfered with door key 52, and door part 3 can be closed to full cut-off lock position Pc(can blocking).

Like this, in the anti-locking apparatus 6 of locking, by making pedestal 62 from preventing locked position of coupler Sd to moving in the interval of locked position of coupler Se, can shutter 671 be utilized to switch door key 52 pass through, thus can preventing blocking and can switch between blocking at door part 3.

By these pedestals 62, as force application part helical spring 643, prevent that locking from maintaining mechanism 65, key constraint mechanism 66 and shutter 671 form and of the present inventionly prevent blocking mechanism 67.

In addition, regulate locking to prevent apparatus main body 60 relative to the setting position of members of frame 2, position locking for door key 52 to be as the criterion locked position of coupler Ps to make this shutter 671.

Show the locking locking anti-locking apparatus 6 in fig. 5 and fig. and prevent key 68.

The above-mentioned locking that prevents maintains mechanism 65, key constraint mechanism 66 and prevents blocking mechanism 67 from can prevent key 68 from setting and removing by locking respectively.

Locking prevents key 68 have the axle 681 of bar-shaped or tubulose and be fixed on the handle 682 of base end side of axle 681.In addition, be fixed with key member 650 in the front end of axle 681, the side face of the front of axle 681 is fixed with bar 663.

As shown in Figure 2, axle 681 is formed as such length: under the state of table side being in door part 3 when running through in the key through hole 69 being inserted in door part 3, at handle 682, and front end arrives in box 61.

As shown in Figure 2, handle 682 is when running through in the key through hole 69 being inserted in door part 3, and the surface to door part 3 is close, the opening surface of the key through hole 69 of door part 3 can be covered all sidedly and locking.

Here, as shown in Figure 1, the key through hole 69 of door part 3 is formed by two elongated holes 691,692 intersected with the T-shaped of standing upside down.

Elongated hole 691 extends longer for through for the table back side of door part 3 and level, no matter door part 3 is in full cut-off lock position Pc or is in accurate locked position of coupler Ps can both run through insertion.For this reason, elongated hole 691 is formed with the width fully larger than the distance dP of full cut-off lock position Pc and accurate locked position of coupler Ps.In addition, the width (interval of above-below direction) of elongated hole 691 is formed prevent the width of the bar 663 of key 68 large than locking.

Elongated hole 692 extends upward from the pars intermedia of elongated hole 691.The profile of elongated hole 692 prevents the shape of the bar 663 of key 68 according to locking and is formed.

Thus, under the state that bar 663 is horizontal, locking prevents key 68 can through in key through hole 69.In this case, at bar 663 from the state that axle 681 laterally erects, axle 681 and bar 663 can together with through elongated hole 691.

In addition, under bar 663 state upward, locking prevents key 68 can through in key through hole 69.In this case, at bar 663 from the state that axle 681 erects upward, axle 681 and bar 663 can pass elongated hole 691 and elongated hole 692.

As mentioned above, be fixed with key member 650 in the front end of axle 681, the side face of front is fixed with bar 663.

Key member 650 is keys corresponding with above-mentioned cylinder lock 651, by rotating in the keyhole 653 that is inserted in cylinder lock 651, and can the entering and retreating of switching bolt 652.

Under the state that such key member 650 is in full cut-off lock position Pc or accurate locked position of coupler Ps at door part 3, by locking being prevented key 68 through in key through hole 69, patchhole 632 is run through from key in the front end of axle 681 import in box 61, can be inserted into thus in the keyhole 653 of cylinder lock 651.

As mentioned above, by the switching entering and retreat of the bolt 652 in cylinder lock 651, the setting and the releasing that prevent locking from maintaining mechanism 65 can be operated.

Bar 663 is the plate-shaped members extended in the direction intersected with its longitudinally from axle 681.

Bar 663 forms key constraint mechanism 66 of the present invention together with above-mentioned retainer 661.

Under the state that door part 3 is in full cut-off lock position Pc or accurate locked position of coupler Ps, by locking being prevented key 68 through in key through hole 69, and bar 663 is imported in box 61.

If prevent key 68 from inserting locking under bar 663 state upward, then bar 663 is through the elongated hole 692 upward of key through hole 69, and the key through panel 63 runs through the part extended of patchhole 632 upward, is imported by box 61.

If prevent key 68 from inserting locking under the state that bar 663 is horizontal, then bar 663 is through the elongated hole 691 of the level of key through hole 69, and the key through panel 63 runs through the laterally extending part of patchhole 632, is imported by box 61.

Here, when preventing key 68 from inserting locking under the state at bar 663 being transverse direction, bar 663 contacts with retainer 661.

One-way clutch 664 is formed in the front end of bar 663.One-way clutch 664 is split the front end of bar 663 and uses the structure that hinge 665 links.

The rotating shaft of hinge 665 is handle 682 side that locking prevents key 68, fore-end as the bar 663 of one-way clutch 664 can prevent handle 682 side of key 68 from rotating (state of the single dotted broken line of Fig. 4 and Fig. 6) to locking, but is limited to the rotation of opposition side by the abutting that the thicker of the sheet material of bar 663 is divided.

Hinge 665 is equipped with not shown elastomeric element, and the fore-end as the bar 663 of one-way clutch 664 is maintained the state (state of the solid line of Fig. 4 and Fig. 6) of a straight line usually on the extended line of bar 663.

By forming such one-way clutch 664, make bar 663 from prevent locked position of coupler Sd towards can locked position of coupler Se move time, one-way clutch 664 action, can pass retainer 661.But, when oppositely namely from can locked position of coupler Se towards when preventing locked position of coupler Sd from moving, one-way clutch 664 is failure to actuate, and can not pass retainer 661.

Here, the side, bottom surface 611 of retainer 661 can not be connected to through the bar 663 of retainer 661, and pass through the active force of the helical spring 643 of the pedestal 62 be connected with cylinder lock 651 via key member 650, pressed by bottom surface 611 thruster to retainer 661 and keep.

By these retainers 661, pedestal 62 otch 662, locking prevent the bar 663 of key 68, the folding one-way clutch 664 in front portion of bar 663 front end, the helical spring 643 as force application mechanism, form key constraint mechanism 66 of the present invention.

The action of such present embodiment is as described below.

Operation door 1 is full cut-off lock status when machine tool running, and door part 3 is closed to the full cut-off lock position Pc of Fig. 2.Now, in safety switch 5, need to insert door key 52 in slot 53.Therefore, in the anti-locking apparatus 6 of locking, shutter 671 is in the state (preventing blocking mechanism 67 by the state removed) of retrogressing, pedestal 62 also retreat and be in can locked position of coupler Se(prevent locking maintain mechanism 65 by the state removed), not hinder door key 52.

This state prevents the bar 663 of key 68 be limited through retainer 661 and maintain by locking.Further, in this condition, by the active force of helical spring 643 bar 663 pushed and remain on retainer 661, thus locking prevents key 68 restrained and can not extract (state setting key constraint mechanism 66).

When operating personnel enters into inside from operation door 1, after being stopped by lathe, door part 3 is made to move to accurate locked position of coupler Ps from full cut-off lock position Pc.Now, locking prevents key 68 from keeping running through the state be inserted in key through hole 69, but can relative movement in elongated hole 691.

In addition, if do not stopped by lathe and opened by operation door 1, then, when door key 52 departs from from slot 53, detected the opening of operation door 1 by safety switch 5, machine tool action stops thus.

Then, operating personnel's operational lock prevents key 68, is removed by key constraint mechanism 66, and shutter 671 is advanced, and carries out preventing the setting of blocking mechanism 67 and preventing locking from maintaining the setting of mechanism 65, then locking is prevented key 68 from taking out.

Specifically, swing handle 682, prevents key 68 from slightly pushing while rotate by locking, and the bar 663 be crimped on retainer 661 is rotated upward from the state of transverse direction, the restriction cancellation (releasing of key constraint mechanism 66) produced by retainer 661.

In this condition, if prevent pushing of key 68 from loosening locking, then released by pedestal 62 by the helical spring 643 as force application part, from advancing to preventing locked position of coupler Sd by locked position of coupler Se, shutter 671 also advances.Entered by this shutter 671, prevent door key 52 to be inserted in slot 53 again, door part 3 becomes can not again to the state (setting the state preventing blocking mechanism 67) that full cut-off lock position Pc returns.

In addition, if locking pin 655 is interfered with bolt 652 during pedestal 62 advances, locking then can not be made to prevent key 68 from further rotating, if but along with before pedestal 62 and then arrive the position that locking pin 655 do not interfere with bolt 652, then prevent key 68 from can further rotate at this time locking, by this rotation, operate cylinder lock 651 via key member 650, bolt 652 enters.

In this condition, locking prevents key 68 from extracting by operating personnel, carries this locking and prevents key 68 from entering to the inside of operation door 1.

Under the state preventing key 68 from extracting locking, by the third party, shutter 671 is pushed, even if make pedestal 62 again to retreating by locked position of coupler Se, bolt 652 and locking pin 655 are interfered, and also prevent the retrogressing (setting the state preventing locking from maintaining mechanism 65) of pedestal 62.

That is, lock anti-locking apparatus 6 under the state not having locking to prevent key 68, can not again will prevent blocking mechanism 67 from removing, operation door 1 can not be closed.Further, locking prevents key 68 from being carried by the operating personnel entered in operation door 1, and the shutting up of the operating personnel locking because of unexpected operation door 1 can caused is prevented trouble before it happens.

Operating personnel is as described below from the operation of operation door 1 out and again being closed by operation door 1.

Door part 3 is closed to accurate locked position of coupler Ps by operating personnel.In this condition, be set the state preventing blocking mechanism 67, by the shutter 671 advanced by locking for door key 52, thus door part 3 can not be closed to full cut-off lock position Pc.

The locking of carrying prevents from key 68 to be inserted into closing in the key through hole 69 of the door part 3 of accurate locking place value Ps, be inserted in the keyhole 653 of cylinder lock 651 by the key member 650 of front end by operating personnel.In this condition, locking prevents the bar 663 of key 68 upward.

Then, make locking prevent key 68 from rotating and bolt 652 is retreated, and becoming the state (preventing locking from maintaining the releasing of mechanism 65) of not interfering with locking pin 655.In this condition, locking prevents the bar 663 of key 68 for horizontal.

Then, locking being prevented key 68 from pushing, making pedestal 62 from preventing locked position of coupler 5d to retreating by locked position of coupler Se.Thus, shutter 671 also retreats, and door key 52 can pass (preventing the releasing of blocking mechanism 67).

Locking prevents key 68 from being laterally by making bar 663 and pushing, and bar 663 is abutted with retainer 661.Now, the front end of bar 663 is bent by one-way clutch 664, and bar 663 can to passing locked position of coupler Se side.

At bar 663 through after retainer 661, operating personnel stops locking and prevents pushing of key 68.So the locked pedestal 62 preventing key 68 from pushing is pushed back towards preventing locked position of coupler Sd by the helical spring 643 as force application part.By this motion, bar 663 is pressed on retainer 661 and retrains (setting of key constraint mechanism 66).

That is, be kept device 661 by bar 663 to retrain, limit pedestal 62 towards the movement preventing locked position of coupler Sd, thus maintain shutter 671 retreat the disarm state preventing blocking mechanism 67.

In addition, be kept device 661 by bar 663 and retrain, prevent locking to prevent key 68 from unnecessarily extracting.

After completing these operations, door part 3 is closed to full cut-off lock position Pc from accurate locked position of coupler Ps by operating personnel.Thus, the locking of operation door 1 completes.

Like this, in the present embodiment, under the state that operation door 1 is closed, operating personnel, by means of only locking being prevented key 68 to insert from key through hole 69 and operating, just can prevent from switching between state (state that door part 3 can not be closed further than accurate locked position of coupler Ps) at the lock-out state of operation door 1 (door part 3 is closed to the state of full cut-off lock position Pc) and locking.

Further, when entering in operation door, operating personnel prevents key 68 by carrying locking, even if make operation door 1 close, also can not be mistakenly identified as lock-out state.

Thus, carry the locking of extracting from key through hole 69 operating personnel and prevent key 68 and entering into the situation in operation door, even if operation door 1 is closed, this operation door 1 can not be made to become lock-out state, operating personnel can be prevented to be held in the inside.

[the 2nd embodiment]

Represent the 2nd embodiment of the present invention in the figure 7.

In above-mentioned 1st embodiment, in key constraint mechanism 66, prevent the front end of the bar 663 of key 68 from bending locking and become one-way clutch 664.

In the present embodiment, as shown in Figure 7, the bending of the front end of retainer 661 is become one-way clutch 664.In addition, other formations of present embodiment are identical with above-mentioned 1st embodiment, use identical Reference numeral, and the repetitive description thereof will be omitted about common formation.

In such present embodiment, also can obtain the effect same with above-mentioned 1st embodiment.

And then locking prevents the bar 663 of key 68 from can make simple tabular, and the locking that operating personnel can be made to carry prevents key 68 for simply to form than the 1st embodiment.

Like this, the position arranging one-way clutch 664 can be that locking prevents key 68 side and locking from preventing the either side of apparatus main body 60.

[the 3rd embodiment]

Represent the 3rd embodiment of the present invention in fig. 8.

In the present embodiment, as shown in Figure 8, retainer 661 arranged the plunger that exerted a force by helical spring and form one-way clutch 666.In this one-way clutch 666, make the front end of plunger be inclined plane, lock prevent the front end of the bar 663 of key 68 with towards can locked position of coupler Se contact time, plunger can retreat and pass, towards prevent locked position of coupler Sd contact limit passing.In addition, other formations of present embodiment are identical with above-mentioned 1st embodiment, use identical Reference numeral, and the repetitive description thereof will be omitted about common formation.

Like this, as long as the structure of one-way clutch 664 can obtain unidirectional function of passing, any formation can be adopted.

[the 4th embodiment]

Represent the 4th embodiment of the present invention in fig .9.

Present embodiment basic comprising is identical with above-mentioned 1st embodiment, but the formation of guide part 64 is different with preventing the formation of locking maintenance mechanism 65.Therefore, below different formations is described, use identical Reference numeral about common formation, and the repetitive description thereof will be omitted.

In above-mentioned 1st embodiment, as the guide part 64 making pedestal 62 along mobile axis Am movement, use the guide finger 641 be fixed on the bottom surface 611 of box 61 and the pilot hole 642 be formed on the corner of pedestal 62.

In the present embodiment, as shown in Figure 9, pedestal 62 has sleeve 644 on its opposed edge.

Sleeve 644, by the bending of the ora terminalis of pedestal 62 being formed, can contact slidably with the inner surface of the cylindrical shell 612 of box 61.Utilize the inner surface of these sleeves 644 and cylindrical shell 612, form the guide part 64 of guide base 62.

According to so telescopic guide part 64, even if make pedestal 62 when mobile tilt relative to mobile axis Am, also can utilize sleeve 644 will towards recovery.

In above-mentioned telescopic guide part 64, in order to make the slip of pedestal 62 and box 61 smooth and easy, also can the liner 645 be made up of low friction material be set on sleeve 644.

As liner 645, as long as suitable use is the existing materials such as the fluororesin of low frictional properties.

In addition, as making the slip of pedestal 62 and box 61 form smoothly, the track 646 extended along mobile axis Am also can be set on the inner surface of the cylindrical shell 612 of box 61.

As track 646, except the lines of metal material are fixing, also can make the material projection continuously of cylindrical shell 612, or above-mentioned low friction material also can be made for band shape and fix.

Like this, as guide part 64, make pedestal 62 relative to the function of box 61 along mobile axis Am movement as long as can obtain, then can adopt any formation.

In above-mentioned 1st embodiment, locking pin 655 is used as preventing locking from maintaining the movement restricting member of mechanism 65, by making its front end be connected on the back side (side opposed with running through patchhole 654) of bolt 652, limit pedestal 62 to can the movement of locked position of coupler Se side.

In the present embodiment, as shown in Figure 9, the bottom surface 611 of box 61 is provided with the locking plate 656 run through in patchhole 654 that can run through and be inserted into slit-shaped.Locking plate 656 is formed with locking hole 657, the bolt 652 inserting cylinder lock 651 can be run through in this locking hole 657.

Maintain in mechanism 65 in the locking that prevents of such present embodiment, be inserted in the locking hole 657 of locking plate 656 by making bolt 652 run through, the movement of pedestal 62 relative to the mobile axis Am direction of box 61 can be limited, the effect same with above-mentioned 1st embodiment can be obtained.

And then, locking hole 657 can with the way moving along mobile axis Am of limit bolt 652, namely with the movement to side, bottom surface 611 of limit pedestal 62 and the movement to opening surface 610 side, pedestal 62 can be prevented more reliably to can the movement of locked position of coupler Se.

Like this, as preventing locking from maintaining mechanism 65, as long as restriction pedestal 62 can be obtained relative to the function of the movement of the mobile axis Am of box 61, then any formation can be adopted.

[the 5th embodiment]

Represent the 5th embodiment of the present invention in Fig. 10.

In above-mentioned 1st embodiment, use the box 61 of rectangular box and the pedestal 62 of rectangular plate-like and panel 63.

In the present embodiment, as shown in Figure 10, cylindric box 61A and discoid pedestal 62A and panel 63A is used.

Pedestal 62A is formed with the such sleeve 644A of above-mentioned 4th embodiment on its periphery, between the inner surface of box 61A, be formed with guide part 64.Pedestal 62A is exerted a force to front side by the helical spring 643A as force application part.Pedestal 62A is formed otch 662A, and the retainer 661A in box 61A can pass this otch 662A.Utilize these otch 662A and retainer 661A, form the rotation prevention portion of box 61A and pedestal 62A.In addition, guide finger 655 is in staggered configuration from the center of box 61A, utilizes this formation also to form the rotation prevention portion of box 61A and pedestal 62A.These rotation prevention portions also only can have one party.In addition, other formations of present embodiment are same with above-mentioned 1st embodiment, use identical Reference numeral, and the repetitive description thereof will be omitted about common formation.

Like this, about the formation forming locking and prevent the box of apparatus main body 60 and pedestal etc., as long as can obtain as the function desired by housing and mechanism, then arbitrary shape or formation can be adopted.

[the 6th embodiment]

Represent the 6th embodiment of the present invention in fig. 11.

In above-mentioned 1st embodiment, when arranging the safety switch 5 of operation door 1, switch main body 51 being fixed on the post 4 of members of frame 2, door key 52 is fixed on door part 3.

In the present embodiment, as shown in figure 11, switch main body 51 is fixed on door part 3, door key 52 is fixed on the post 4 of members of frame 2.In addition, other formations of present embodiment are identical with above-mentioned 1st embodiment, use identical Reference numeral, and the repetitive description thereof will be omitted about common formation.

Like this, the state that arranges of safety switch 5 is not limited to the formation of the respective embodiments described above, as long as lock anti-locking apparatus 6 can utilize and prevent the shutter 671 of blocking mechanism 67 to be inserted in the slot 53 of switch main body 51 to prevent door key 52, then it can be arbitrary configuration.

In addition, when switch main body 51 is fixed on door part 3, preferably suitably note the distribution of switch main body 51 is moved together with door part 3.

[the 7th embodiment]

Represent the 7th embodiment of the present invention in fig. 12.

In above-mentioned 1st embodiment, in the anti-locking apparatus 6 of locking, by preventing the shutter 671 of blocking mechanism 67 from entering into door key 52 on the insertion path of slot 53, door part 3 is prevented to be closed to full cut-off lock position Pc from accurate locked position of coupler Ps.

In the present embodiment, as shown in figure 12, comprise stop part 672 as anti-the preventing blocking mechanism 67 of locking apparatus 6 of locking, by this stop part 672 by locking for the ora terminalis of door part 3, prevent door part 3 to be closed to full cut-off lock position Pc from accurate locked position of coupler Ps.

The shutter 671(of the stop part 672 of present embodiment and above-mentioned 1st embodiment is with reference to Fig. 2 and Fig. 3) in the same manner as be bearing on pedestal 62, can switch from the outstanding length of panel 63.But formed longer than shutter 671, to arrive door part 3.

In addition, other structures of present embodiment are identical with above-mentioned 1st embodiment, use identical Reference numeral, and the repetitive description thereof will be omitted about common structure.

In such present embodiment, the effect same with above-mentioned 1st embodiment can be obtained.

That is, the structure that present embodiment is such from above-mentioned 1st embodiment is different, in above-mentioned 1st embodiment, utilizes shutter 671 to block the insertion of door key 52 to slot 53, thus directly blocks the action of safety switch 5.But in the present embodiment, by stoping door part 3 to the movement of full cut-off lock position Pc, result can block the insertion of door key 52 to slot 53, can obtain same effect thus.

In addition, in the present embodiment, the anti-locking apparatus 6 of locking due to stop part 672 grade has nothing to do with the safety switch 5 of door key 52 grade, so by locking anti-locking apparatus 6 and safety switch 5 configures at various height or different positions, thus can also can guarantee that the equipment of operation door 1 periphery arranges the free degree.

[the 8th embodiment]

Represent the 8th embodiment of the present invention in fig. 13.

In above-mentioned 7th embodiment, use stop part 672 as anti-the preventing blocking mechanism 67 of locking apparatus 6 of locking, utilize this stop part 672 by locking for the ora terminalis of door part 3, thus prevent door part 3 from closing to full cut-off lock position Pc from accurate locked position of coupler Ps.But, be inserted into locking and prevent the key through hole 69 of key 68 to be formed in a same manner as in the first embodiment on door part 3.

In the present embodiment, as shown in figure 13, door part 3 forms extension plate 699, this extension plate 699 forms key through hole 69.In addition, same extension plate 699 arranges locking projection 698, the locking projection 698 of stop part 672 and this is abutted, and that carries out door part 3 thus prevents locking.

In fig. 13, locking prevents apparatus main body 60 to be fixed on the post 4 at the position that door part 3 does not arrive.Extension plate 699 is configured to one end and is fixed on door part 3 and the other end covers locking prevents apparatus main body 60.

On extension plate 699, with by locking on position corresponding to the position that prevents the locking of apparatus main body 60 from preventing key 68 from inserting, be formed with key through hole 69 in a same manner as in the first embodiment.

In addition, the back side (preventing the face of apparatus main body 60 opposite side with locking) of extension plate 699 is formed with locking projection 698.When door part 3 is in accurate locked position of coupler Ps, locking projection 698 is in the position corresponding with locking the stop part 672 that prevents apparatus main body 60, by locking on stop part 672, prevents door part 3 from closing to full cut-off lock position Pc.

In addition, other formations of present embodiment are identical with above-mentioned 1st embodiment, use identical Reference numeral, and the repetitive description thereof will be omitted about common formation.

And then, in a same manner as in the seventh embodiment, can obtain locking anti-locking apparatus 6 and safety switch 5 between the free degree is set, and by using extension plate 699, make not need to form key through hole 69 on door part 3, even if when being appended on existing lathe by anti-for locking of the present invention locking apparatus 6, enforcement also can be made easy.

[the 9th embodiment]

Represent the 9th embodiment of the present invention in fig. 14.

At above-mentioned 1st embodiment in the 8th embodiment, respectively by door part 3 and the members of frame 2 fabrication process door 1 of sliding door type.

In the present embodiment, by door part 3 and the members of frame 2 fabrication process door 1 of rotary type.

In fig. 14, door part 3 is rotary type, relative to the full cut-off lock position Pc represented by solid line, can open to the accurate locked position of coupler Ps represented by double dot dash line.

In order to correspond to the door part 3 of such rotary type, also change the configuration of safety switch 5 and the anti-locking apparatus 6 of locking.

About safety switch 5, the slot 53 being arranged on the switch main body 51 on post 4 is arranged opposite with door part 3, and the door key 52 be arranged on the position of the correspondence of door part 3 can insert.When door part 3 is in full cut-off lock position Pc, be inserted into by door key 52 in slot 53, when door part 3 is in accurate locked position of coupler Ps, door key 52 is deviate from from slot 53.

Locking anti-locking apparatus 6 in a same manner as in the eighth embodiment, using stop part 672 as preventing blocking mechanism 67, stop part 672 is configured to its front end and is connected on the back side (locking prevents apparatus main body 60 side) of door part 3.

Stop part 672 does not also contact with the door part 3 being in full cut-off lock position Pc under the state retreated.But, contact with door part 3 under the state of advancing, thus prevent door part 3 to close further than accurate locked position of coupler Ps.

In addition, locking prevent key 68 in order to when door part 3 is in accurate locked position of coupler Ps arrival locking prevent apparatus main body 60, and need that there is sufficient length, but can when closing to full cut-off lock position Pc the displacement of hatch parts 3.For this reason, locking prevents key 68 from can be the stretching structures such as telescope-type, also can be folding type etc.

And then, in a same manner as in the seventh embodiment, can obtain locking anti-locking apparatus 6 and safety switch 5 between the free degree is set.

Like this, the anti-locking apparatus 6 of locking of the present invention is not limited to the operation door 1 of sliding door type, also can be applied to the operation door 1 of rotary type.

[the 10th embodiment]

Represent the 10th embodiment of the present invention in fig .15.

In above-mentioned 9th embodiment, in the operation door 1 of rotary type, be provided with the anti-locking apparatus 6 of locking using stop part 672.Now, stop part 672 directly contacts with door part 3.

In the present embodiment, as the 8th embodiment, door part 3 arranges extension plate 699, this extension plate 699 forms key through hole 69, and stop part 672 is connected on this extension plate 699.

And then, in a same manner as in the seventh embodiment, by use stop part 672, can obtain locking anti-locking apparatus 6 and safety switch 5 between the free degree is set.In addition, in a same manner as in the eighth embodiment, do not need to form key through hole 69 on door part 3, even if when anti-for locking of the present invention locking apparatus 6 is appended to existing lathe, enforcement also can be made easy.

(the 11st embodiment)

Represent the 11st embodiment of the present invention in figure 16.

At above-mentioned 1st embodiment in the 10th embodiment, the pedestal 62 of inside setting along mobile axis Am movement of apparatus main body 60 is prevented respectively in locking, make to be bearing in shutter 671 on this pedestal 62 or stop part 672 is projected into the outside that locking prevents apparatus main body 60, utilize these shutters 671 or stop part 672 to be blocked by the mobile of door key 52, or limiting door parts 3 are to the movement of closing direction.

In the present embodiment, the locking that the shutter 671 replacing each embodiment such or stop part 672 are retreated prevents apparatus main body 60, and the cylinder lock using bolt to retreat.

In figure 16, operation door 1 has the door part 3 of members of frame 2 and sliding door type.The post 4 of members of frame 2 arranges the switch main body 51 of safety switch 5, the door key 52 of door part 3 can be inserted in its slot 53.

The post 4 of members of frame 2 is fixed with the cylinder lock 70 of the major part as the anti-locking apparatus 6 of locking.

Cylinder lock 70 has the bolt 71 can retreated towards door part 3.By inserting special key member 650 and make it rotate in cylinder lock 70, bolt 71 can be made to enter or retreat.In addition, cylinder lock 70 has the box (omission Reference numeral) of its mechanism section of storage.

Key member 650 is arranged on the front end that locking prevents key 68.

Locking prevents key 68 from being formed in the same manner as above-mentioned 1st embodiment (with reference to Fig. 6).But bar 663 is fixed on the position of the handle 682 of axle 681.

Door part 3 is fixed with one end of extension plate 699, and the other end of this extension plate 699 configures in the mode covering cylinder lock 70.Key through hole 69 is formed in the position of the cylinder lock 70 covering extension plate 699.

Key through hole 69 makes locking prevent key 68 from running through the hole of insertion.The contour shape of key through hole 69 is prevent with locking the shape that the bar 663 of key 68 is corresponding, and only when locking prevents key 68 for specific rotation status, bar 663 can pass key through hole 63.These bars 663 and key through hole 69 is utilized to form key constraint mechanism 66.

Door part 3 is connected to along extension plate 699 and abuts plate 697.Abutting plate 697 is parts of L-shaped, away from the end of door part 3 side to configure from extension plate 699 in the crisscross mode erected, can be connected on the bolt 71 of above-mentioned cylinder lock 70.

Now, if bolt 71 is get the hang of (solid line of Figure 16 represents), is then connected on bolt 71 by abutting plate 697, carrys out limiting door parts 3 and closing further than accurate locked position of coupler Ps.On the other hand, if bolt 71 is fallback state (chain-dotted line of Figure 16 represents), then abut plate 697 and be not connected on bolt 71, thus door part 3 can closes to full cut-off lock position Pc from accurate locked position of coupler Ps.

Utilize these cylinder locks 70 and abut plate 697 formation and prevent blocking mechanism 67.

In such present embodiment, usually by the bolt 71 of cylinder lock 70 being remained in advance the position of retrogressing, make door part 3 can latch to full cut-off lock position Pc.Further, in this condition, run through by locking being prevented key 68 and be inserted in key through hole 69, make door part 3 can not exceed accurate locked position of coupler Ps and open.

Here, operational lock prevents key 68, and bolt 71 is entered from cylinder lock 70, and bar 663 is moved to the position overlapped with key through hole 69.Thus, bar 663 can pass key through hole 69, by locking being prevented key 68 from extracting, makes door part 3 can exceed accurate locked position of coupler Ps and open.

In this condition, because bolt 71 enters from cylinder lock 70, so door part 3 can not be closed further than accurate locked position of coupler Ps, realize thus preventing locking or preventing operating personnel from shutting up.

On the other hand, when again being closed by operation door 1, door part 3 being closed to accurate locked position of coupler Ps, locking being prevented key 68 to be inserted in key through hole 69, the key member 650 of front end is inserted in cylinder lock 70.Further, until bar 663 is through after key through hole 69, make locking prevent key 68 from rotating, operation cylinder lock 70, makes bolt 71 retreat.

Thus, removed with the abutting abutting plate 697 by bolt 71, door part 3 can close to full cut-off lock position Pc.

According to such present embodiment, the effect same with above-mentioned 1st embodiment also can be obtained.

And then, use cylinder lock 70 owing to replacing the locking of the 1st embodiment to prevent apparatus main body 60, so formation significantly can be simplified.

[the 12nd embodiment]

Represent the 12nd embodiment of the present invention in fig. 17.

In above-mentioned 11st embodiment, in the operation door 1 of sliding door type, apply the anti-locking apparatus 6 of simple locking using cylinder lock 70.

In the present embodiment, in the operation door 1 of rotary type, application uses the anti-locking apparatus 6 of simple locking of same cylinder lock 70.

In fig. 17, comprise cylinder lock 70 prevent blocking mechanism 67, locking prevent key 68, key through hole 69 and key constraint mechanism 66, extension plate 699 and abut plate 697 are structures same with the 11st embodiment.

But door part 3 is rotary type relative to members of frame 2, therefore, the setting position of safety switch 5 and towards difference, abuts the mode that plate 697 abuts with the side of bolt 71 with its front end and configures.

And then, same with the 11st embodiment, use cylinder lock 70, so formation can be made significantly to simplify owing to replacing the locking of the 1st embodiment to prevent apparatus main body 60.

[the 13rd embodiment]

Represent the 13rd embodiment of the present invention in figure 18.

In above-mentioned 9th embodiment (Figure 14), the 10th embodiment (Figure 15), the 12nd embodiment (Figure 17), in the operation door 1 of rotary type, by forming the key through hole 69 being used for preventing key 68 through locking on door part 3, and handle 682 can not run through insertion according to its anglec of rotation, prevent door part 3 from unnecessarily opening.

As shown in figure 18, present embodiment has substantially same with the 11st embodiment shown in Figure 14 formation.And then, in the present embodiment, key through hole 69 is formed as handle 682 and independently can runs through insertion with its anglec of rotation, and in key through hole 69, be provided with the auxiliary door 693 of the rotary type of the function playing check-valves.Auxiliary door 693, with pair of right and left configuration, is rotatably bearing on door part 3 respectively.Auxiliary door 693, by forces such as not shown helical springs, maintains the position (position along the surface of door part 3) closed by key through hole 69 usually.

In such present embodiment, under the state that door part 3 is opened, locking can be prevented key 68 to be inserted into locking and to prevent in apparatus main body 60 thus door part 3 is closed.Now, when door part 3 is closed, auxiliary door 693, through key through hole 69, can be pushed open and reach the table side of door part 3 by handle 682.When handle 682 reaches the table side of door part 3 completely, auxiliary door 693 is closed again, is closed by key through hole 69 at the dorsal part of handle 682.

When door part 3 being opened in this condition, door part 3 by locking for handle 682, thus can not be opened by auxiliary door 693.Here, if prevent apparatus main body 60 from being extracted by handle 682 from locking, then auxiliary door 693 is opened, and handle 682 is passed, so can again be opened by door part 3.

By using the auxiliary door 693 of the function playing such check-valves, the opening of unexpected door part 3 can be prevented.

[variation]

In addition, the present invention is not limited to the formation of the respective embodiments described above, and the distortion etc. that can realize in the scope of object of the present invention comprises in the present invention.

Such as, the material of box 61, pedestal 62, panel 63 etc., except metal sheet material, also can be synthetic resin material, and each shape and size formed can suitably be selected when implementing.These are also same about other formations in each embodiment.

Claims

1. the anti-locking apparatus of locking, it is the anti-locking apparatus of locking of operation door, described operation door has the door part of the one party being formed with door key or slot and is formed with the members of frame of the opposing party of above-mentioned door key or above-mentioned slot, there is above-mentioned door key and be not inserted in the accurate locked position of coupler in above-mentioned slot and above-mentioned door part is closed completely and above-mentioned door key is inserted in the full cut-off lock position in above-mentioned slot, it is characterized in that, comprising:

Key through hole, is formed in the one party of above-mentioned door part or above-mentioned members of frame;

Box, is formed on the opposing party of above-mentioned door part or above-mentioned members of frame;

Locking prevents key, and run through from the opposition side with above-mentioned box and insert above-mentioned key through hole, front end is directed in above-mentioned box;

Prevent blocking mechanism, limit above-mentioned door part and move to above-mentioned full cut-off lock position from above-mentioned accurate locked position of coupler, and can prevent key from setting by above-mentioned locking and remove;

Key constraint mechanism, when by above-mentioned prevent blocking mechanism from removing time, prevent key to be constrained to above-mentioned locking and run through the state be inserted in above-mentioned key through hole.

2. the anti-locking apparatus of locking as claimed in claim 1, is characterized in that,

The above-mentioned blocking mechanism that prevents has:

Shutter, can along from preventing locked position of coupler to moving the mobile axis of locked position of coupler, when be in above-mentioned prevent locked position of coupler time, engage with the above-mentioned door key being in above-mentioned accurate locked position of coupler, above-mentioned door key can be prevented to the insertion of above-mentioned slot, and when being in above-mentioned can the interference with above-mentioned door key during locked position of coupler;

Force application part, exerts a force to the above-mentioned locked position of coupler side that prevents to above-mentioned shutter; With

Prevent locking from maintaining mechanism, limit above-mentioned shutter and can move locked position of coupler side to above-mentioned, and can prevent key from setting by above-mentioned locking and remove.

3. the anti-locking apparatus of locking as claimed in claim 1, is characterized in that,

The above-mentioned blocking mechanism that prevents has:

Stop part, can along from preventing locked position of coupler to moving the mobile axis of locked position of coupler, when be in above-mentioned prevent locked position of coupler time, the above-mentioned door part being in above-mentioned accurate locked position of coupler is engaged with above-mentioned members of frame, above-mentioned door part can be prevented to the movement of above-mentioned full cut-off lock position, and when be in above-mentioned can locked position of coupler time, above-mentioned door part can be removed with the engaging of above-mentioned members of frame;

Force application part, exerts a force to the above-mentioned locked position of coupler side that prevents to above-mentioned stop part; With

Prevent locking from maintaining mechanism, limit above-mentioned stop part and can move locked position of coupler side to above-mentioned, and can prevent key from setting by above-mentioned locking and remove.

4. lock anti-locking apparatus as claimed in claim 2 or claim 3, it is characterized in that,

The above-mentioned guide part preventing from blocking mechanism to have being accommodated in the pedestal in above-mentioned box and guide said base along above-mentioned mobile axis relative to above-mentioned box,

Said base exerts a force to the above-mentioned locked position of coupler side that prevents relative to above-mentioned box by above-mentioned force application part,

The above-mentioned locking maintenance mechanism restriction said base that prevents can move locked position of coupler side to above-mentioned relative to above-mentioned box, and can prevent key from setting by above-mentioned locking and remove,

When said base be in relative to above-mentioned box to above-mentioned can locked position of coupler side move state time, above-mentioned key constraint mechanism retrains above-mentioned locking and prevents key.

5. the anti-locking apparatus of locking as claimed in claim 4, is characterized in that,

Above-mentioned locking prevents key to have key member in front end,

The above-mentioned locking maintenance mechanism that prevents comprises cylinder lock and movement restricting member, described cylinder lock is arranged in said base, above-mentioned key member can be inserted, and there is the bolt can retreated on the direction intersected with above-mentioned mobile axis, described movement restricting member is fixed on above-mentioned box, can abut with the above-mentioned bolt got the hang of locked position of coupler side from above-mentioned.

6. lock anti-locking apparatus as claimed in claim 2 or claim 3, it is characterized in that,

Above-mentioned locking prevents key to have the bar extended to the direction intersected with above-mentioned mobile axis,

Above-mentioned key constraint mechanism comprises retainer and one-way clutch, described retainer is fixed on above-mentioned box, can abut with the above-mentioned locked position of coupler side that prevents of above-mentioned bar, described one-way clutch is formed between above-mentioned retainer and above-mentioned bar, when above-mentioned bar to above-mentioned can locked position of coupler side move and abut with above-mentioned retainer time above-mentioned bar is passed, and when above-mentioned bar to above-mentioned prevent locked position of coupler side from moving and abut with above-mentioned retainer time, limit passing of above-mentioned bar.

7. the anti-locking apparatus of locking as claimed in claim 6, is characterized in that,

Above-mentioned locking prevents from key to have running through the axle be inserted in above-mentioned key through hole and the handle be connected on above-mentioned axle,

Above-mentioned key through hole can cover and locking by above-mentioned handle.

8. the anti-locking apparatus of locking as claimed in claim 1, is characterized in that,

Above-mentioned locking prevents key to have the key member of axle, the bar extended from the above-mentioned direction axially intersected and the front end that is connected to above-mentioned axle,

The above-mentioned blocking mechanism that prevents is cylinder lock, be arranged in the one party of above-mentioned door part or above-mentioned members of frame, above-mentioned key member can be inserted, and there is the bolt that can retreat, form stop part, this stop part can along from preventing locked position of coupler to moving the mobile axis of locked position of coupler by above-mentioned bolt, when be in above-mentioned prevent locked position of coupler time, the above-mentioned door part being in above-mentioned accurate locked position of coupler is engaged with above-mentioned members of frame, and above-mentioned door part can be prevented to the movement of above-mentioned full cut-off lock position, and when be in above-mentioned can locked position of coupler time, above-mentioned door part can be removed with the engaging of above-mentioned members of frame,

Above-mentioned key constraint mechanism is made up of above-mentioned key through hole, and this key through hole is the shape that above-mentioned bar can be run through insertion when above-mentioned locking prevents key to be in the specific anglec of rotation.

9. the anti-locking apparatus of the locking according to any one of claims 1 to 3, is characterized in that,

There is the extension plate be fixed on above-mentioned door part or above-mentioned members of frame,

Above-mentioned key through hole is formed at above-mentioned extension plate.