EO AND BLOCKING DEVICE EO WITH THE HELP OF
A KEY OF A PLUG OR COVER ON A FRAME
The present invention relates to a locking and unlocking device with the aid of a key of a plug or cover on a frame. It is applied notably but in a non-restrictive way to a road viewpoint. This device contemplates perfecting the selective blocking obtaining device by making the subject of the French patent application FR-A 2 780 996 in the name of the applicant. This known acquisition device comprises a bolt secured to the cap or cap and a wrench of the operating arm, of which one end carries a casing that can be inserted into a lid opening to access the bolt comprising a rotor. mounted in rotation on the lid and carrying on the other of its ends a latch cooperating with a frame notch and from which another end can be attached to the key cap to allow rotation of the latch about the longitudinal axis of the rotor between a locking position to which the latch is held in stop from the notch and the key to freely remove the lid opening and an unlocking position for which the latch is released from the notch and the key is held in the opening of the latch. top. Thus, when the lid is unlocked from the frame by the key and removed from it, the key remains normally attached to the lid.
However, the situation may arise according to which the operator having removed the cover from the frame wishes to use the integral key of this cover to unlock another identical cover located in the vicinity. For this purpose, it rotates the key to its position that allows it to be removed from the door opening, which is caused by the rotation of the latch relative to the lid in its blocking position. However, when the operator applies the lid on the frame again to close the opening delimited by the latter, the fact that the latch is in its locked position prevents the lid from re-entering the frame. The operator can then manually grasp the latch to rotate it to its unlock position allowing the insertion and application of the lid in its support frame, but the operator can then forget to use the key to lock the latch. To the frame notch, the lid can remain on its frame without blocking it. Furthermore, because the bolt occupies its unlocked position in which the bolt is disengaged from the frame notch, the key socket can no longer be gripped with the corresponding end of the bolt rotor and can lead an operator, before to finally access the causeway viewpoint, to think that the lock no longer functions normally. The object of the present invention is to eliminate the above drawbacks of the known device. For this purpose, the invention proposes a locking and unlocking device with the help of a key of a plug or cover on a frame, comprising a bolt secured to the plug that has an opening for access to the key lock comprising an arm which a limb allows the bolt to be maneuvered when the key is inserted into the plug opening of a lock position in which a bolt latch is held in stop from a frame notch to an unlocked position for which the bolt is disengaged of the notch, the bolt comprising a rotor mounted in rotation in the plug, accessible at its ends by the opening and bringing the latch to its opposite end in order to allow the latch to rotate around the long axis of the rotor. the action of the key between its positions, arrested and disengaged, from the notch, and characterized in that the bolt comprises a helical torsion spring n mounted concentrically on the bolt rotor having one of its ends in support under the cap and its opposite end integral to the rotor so as to exert on the rotor a pair of mobilization forces of the bolt in its blocking position and in which the keyWhen taken by its extremity with the corresponding extremity of the rotor, it allows the rotation of the bolt to its unlocking position when encountering the torsion spring mobilization torque. The extremity of the torsion spring opposite to that resting on the cap is supported on a support integral with the rotor for elastically requesting the free end of the support in support under the cap in order to maintain the bolt in its blocking position. The opening gives access to a cavity of the plug into which the end of the key can be inserted to be taken with the rotor end located in this cavity which is delimited by a first internal wall of plug perpendicular to the upper wall of the same. and the rotor comprises two parts, a first part comprising the end that can be taken with the end of the key and mounted in rotation in a perforation of the first stopper wall and then with the latch at its end. and mounted rotationally in a perforation formed in a na seg u nda for internal network of the plug parallel to the first network, the rotor extends parallel to the upper wall of the plug below it. The torsion spring and the support are placed between the walls, first and second, parallel to the rotor support. Preferably, the rotor comprises a generally cylindrical shaft constituting the part mounted in rotation through the first wall and a body of inductive head to the latch constituting the other part of the rotor mounted in rotation through the second wall, the The cylindrical shaft is screwed coaxially into a perforation of the end body and solidly rotated to this body by two planar faces respectively cooperating with the axis and with the perforation of the end body. The cylindrical shaft and the end body of the rotor are integral in translation with each other by a screw passing through the shaft and the end body and also allowing the support to be fixed to the end body. The torsion spring is arranged between the end body and the flange in support on the external face of the first wall and the rotor shaft comprises a head constituting the end with which the end of the key can be taken, said head being in support on the internal face of the first network by means of a randela. The opening has an L-shaped form in which a branch, parallel to the first network, allows the arm of the key to maneuver in rotation to pass from any of its locking and unlocking positions to the other of the bolt respectively under the for mobilization and for the mobilization of the torque exercised by the torsion spring as soon as the extremity of the arm is taken with the corresponding extremity of the rotor, and prohibits a translation of the arm perpendicularly to this wall when it is located in this branch with the end of the arm of the key in the socket with the corresponding end of the rotor. The cavity of the plug has an inclined wall securing the guide of the end of the arm of the key in the cavity to the bottom thereof to allow this arm to be placed in translation at a position taken with the corresponding extremity of the rotor. The end of the arm of the key is a cylindrical bushing of which the axis is perpendicular to the axis of the arm and which is guided in the cavity at the bottom of this by a rectilinear channel made in the inclined wall. Advantageously, the latch is in the form of a cylinder sector. The support has its free end curved at a right angle coming in support under the plug under the action of the mobilization torque exerted by the torsion spring. The ends of the torsion spring are bent at right angles in parallel and opposite directions. A chain is fixed at the end of the support to allow the bolt to turn to its unlocked position below the cap. The invention will be better understood, and other objectives, features, details and advantages of this will appear more clearly in the following explanatory description made with reference to the attached drawings given only by way of example illustrating an embodiment of the invention and in which: Figure 1 is an exploded perspective view of a part of a sealing plug of a viewing point provided with a locking and unlocking device according to the invention; Figure 2 is a perspective view from below following the arrow II of Figure 1 and representing the device of the invention in position allowing blocking of the plug to a support frame; Figure 3 is a perspective view similar to that of Figure 2 and representing the device of the invention in the unlocked position of the plug;
Figure 4 is a sectional view following the line IV-IV of figure 2 and representing the different elements of the device of the invention in blocking position of the plug with the key inserted in the bottom of a cavity associated with the opening of the plug; Figure 5 is a sectional view following the line V-V of Figure 4; Figure 6 is a sectional view following the line VI-VI of Figure 3 and showing the key cap taken with the drag rotor of the bolt latch occupying its unlocked position; and Figure 7 is a sectional view following the line VII-VII of Figure 6. The locking and unlocking device of the invention that will be described below is particularly intended to equip a plug or lid 1 allowing to seal a frame or counterframe 2 delimiting the opening remarkably of a viewpoint of road. The locking and unlocking device can be operated by a key 3 as will be seen later. The plug 1 has its substantially flat upper wall 1a comprising an opening 4 opening from one part to the outside of the plug 1 and another part in an internal cavity 5 of the plug 1 in the vicinity of the bottom of which a part of a lock 6 is accessible. of the plug 1. The key 3 comprises a maneuvering arm 7 of which a limb is provided with a bushing 8 of which the longitudinal axis is perpendicular to the longitudinal axis of the arm 7 flat to the rectangular cross section. The bushing 8 comprises an internal footprint 8a of square cross section but it is well understood that this footprint may have a cross section of different shape, for example hexagonal. The opening 4 for access to the key 3 is partially blocked by a plate 9 of the plug 1, which can come from material with the latter and conferring an L-shape to the opening 4. Thus, the plate 9, of square or rectangular shape, seals one of the corners of the rectangular opening 4 of the plug 1 so that the remaining part and opening of this opening in the upper wall 1a of the plug 1 has substantially the L-shape allowing the insertion and the maneuvering of the key 3. The cavity 5 of the plug 1 located below the plate 9 is delimited by an internal wall 10 integral with the upper wall 1a of the plug 1 perpendicular to this, opposite from the opening part of the cavity 5 with the opening 4 and which is perpendicular to a inclined wall 11 of the cavity 5 securing the guide of the end part of the key 3 in the cavity 5 to the bottom thereof. A rectilinear groove or channel 12 is made in the inclined wall 11 in verticality of a 4a of the branches of the opening 4 extending parallel to the wall 10, the groove 12 being located under the branch 4a. Thus, by inserting the end part of the key 3 into the opening, the bushing 8 engages in the channel 12 and the flat part of the end of the arm 3 of the key is in abutment on the inclined wall 11 to ensure the sliding guided from the end portion of the arm 3 of the bushing 8 to the bottom of the cavity 5. The bolt 6 of the plug 1 comprises a rotor 13 comprising at one end a bolt 14 and which is mounted in rotation about its longitudinal axis under the plug 1 parallel to the upper wall 1a of this. The rotor 13 comprises two parts integral with each other comprising a generally cylindrical axis 15 mounted in rotation in a bore 16 of the wall 10 and a generally cylindrical end body 17 mounted in rotation in a borehole.
18 made through a second wall 19 integral with the upper wall 1a of the stopper 1 and, consequently, parallel to the wall 10, the end body 17 carrying the latch 14 leaving the wall
19 in opposition to the wall 10. The latch 14 has a general shape in the cross-cylinder sector. The end body 17 is provided with a cylindrical part of smaller diameter 20 located between the two walls 10 and 19 and the cylindrical shaft 15 of the rotor 13 is housed in a bore 21 of the cylindrical part 20 joining in rotation to the latter by two cooperating flat faces 22, Respectively of the shaft 15 and of the bore 21 of the part 20. In addition, the shaft 15 joins in translation in the part 20 of the end body 17 by a screw 24 through the perforations 20a and 15a of the part 20 and the axis 15 perpendicular to its longitudinal axes, coaxial, respective.
The part 20 of the end body 1 7 comprises an external transverse notch with a flat bottom 25 which extends in a plane parallel to the longitudinal axis of the indic cylindrical part 20 and on which an end of a bar 26 is fixed in support forming the The support extends perpendicularly to the longitudinal axis of the part 20. Preferably, the support 26 is fixed to the flat bottom of the notch 25 by the screw 24 whose threaded end is held in a bore hole 26a made in the end. of the support 26. Thus, the support 26 is integral with the rotation of the part 20 and, consequently, of the rotor 1 3. This support has its end 26b opposite to the cylindrical part 20 which reaches the right angle so that this extremity The free can be supported on the inner surface of the upper wall 1 a of the plug 1 as will be seen later. A chain 27 is fixed at one of its ends to the curved end 26b of the support 26. The inductive cylindrical shaft 1 5 of the rotor 1 3 has its free end 28 opposite the latch 14 projecting in the cavity 5 in proximity to the bottom of the body. This and is presented in the form of a square head can be taken with the conjugate internal fingerprint 8a of the bushing 8. The head 28 of the shaft 1 5 is in abutment on the inner face of the wall 1 0 by means of a washer 29. U n twisted helical spring 30 is mounted concentrically on the shaft part 1 5 of rotor 1 3 located between the cylindrical part 20 of the body of endpiece 1 7 and a washer 31 in abutment on the external face of the wall 10. The assembly constituted by the head 28, the washers 29, 31 and the spring 30 makes it possible to maintain axially without practically any play, the rotor 13 relative to the walls 10, 19. The torsion spring 30 has any of its ends bent at the right angle 30a in support so the dorsal face of the support 26 and its opposite extremity equally angled to the right angle 30b is in abutment on the inner face of the upper wall 1a of the cap 1, the ends 30a, 30b being parallel and in opposite direction to each other. In this way, the torsion spring is prestressed so as to exert a pair of forces tending to elastically and constantly move the support 26 in support, by its free end 26b, on the inner face of the upper wall 1a of the stopper 1. Thus , the assembly constituted by the cylindrical part 20 of the end body 17, the support 26, the torsion spring 30 and the washer 31 is located between the two walls 10 and 19 of the plug 1. The latch 14 is able to cooperate with a crosspiece part 32 projecting into the interior of the frame 2 to be held under it in the locking position of the stopper 1 in the frame 2. The crosspiece part 32 has a end 32a defining a space relative to a rib 1b of the stopper 1 resting on a base point 2a of the frame 2, through which the space can rotate the arched part of the latch 14 when unlocking the plug 1 of the frame 2. The base tip 2a is located below the cross-beam forming a groove to 32.
The operation of the inventive device is as follows. It is considered that the plug 1 is locked in the frame 2 by the bolt 6 whose rotor 1 3 is held in position blocked by the spring 30 with the support 26 resting under the plug 1 and the latch 14 taken under the notch 32 as shown in FIG. shown in Figures 2, 4 and 5. The end part of the key 3 is inserted into the cavity 5 through the opening 4 and this introduction can only be done for a single direction of the key. visible in figure 1, that is to say that the bushing 8 slides in the guide channel 1 2 and the flat end part of the arm 3 slides on the inclined wall 1 1 until the casing 8 reaches practically the bottom of the cavity 5. In this position, the key 3 is locked by its arm 7 between the edge of the branching 4b in L of the opening 4 perpendicular to the wall 1 0 and the opposite edge 9a of the plate 9.
Under these conditions, the key 3 can not be operated except by a sliding translation of the bushing 8 to the bottom of the cavity 5 towards the head 28 of the rotor 1 3 so as to be taken directly with it. The translatory movement is illustrated from figure 4 to figure 6. Once the bushing 8 is taken with the head 28 of the rotor 1 3, the arm 7 of the key 3 is in the alignment of the branch 4a of the opening 4 parallel to the wall 1 0 so that the key 3 can be maneuvered in rotation to draw in rotation the assembly constituted by the shaft 1 5, the indian cylindrical part 20, the support 26, the end body 1 7 and, consequently, the latch 14, to the encounter of the mobilizing force exerted by the torsion spring 30 so as to allow the latch 14 to disengage from the notch 32 through the space between the notch and nerve 1. Figures 3, 6 and 7 show the position of the latch 14 disengaged from the notch 32. Therefore, the plug 1 can be lifted by the operator with the help of key 3 and completely disengaged from the frame 2. When the operator puts the plug 1 on the floor in proximity to the frame 2, the torsion spring 30 automatically moves the rotor 1 3 of the bolt 6 in its locked position and the key 3 is also automatically moved by the torsion spring 30 to its position to which the arm 7 is in abutment on the edge of the aperture 4 located at the angle of two branches of the L-shape of this aperture. To this position of the key 3, this can be removed immediately from the plug 1 when moving translationally perpendicularly to the wall 1 0 in the opposite direction to the position shown in figure 1. The cap 1 can be put in the closed position on the frame 2 with the key 3 inserted in the cavity 5 and rotated to rotate the rotor 1 3 to its unlocked position and from which the latch 14 will occupy its position. allows to enter in the space between notch 32 and rib 1 b. Next, the operator relaxes the handle 3 so that the torsion spring 30 automatically moves the latch 14 to its stopped position under the notch 32. The key 3 can then be removed from the plug 1 by translation perpendicular to the wall 10 to the position of Figure 1 after the sliding of the key 3 out of the opening 4 of this plug. The key 3 must then make in the cavity 5 a movement of translation after rotation or the reverse to lock or unlock respectively the plug on its frame and that passing from one of the branches of the L to another that forms the opening 4 with its associated plate 9. In the situation where the operator has removed the key 3 from the plug 1 after removing the cap from its frame to use this key for the purposes of opening one or more other plugs of their respective frames, the first plug that you no longer understand this key will not be able to be put in its place in your frame. Indeed, because the torsion spring 30 automatically and constantly moves the bolt 6 in its blocking position, the bolt 14 can not be inserted into the space between the notch 32 and rib 1b and will rest on the corresponding part of the crosspiece forming the notch 32. In addition, also if the operator must manually maneuver the latch 14 to make it rotate at the encounter of the mobilization force of the torsion spring 30 to a position corresponding to that of insertion in this space of the notch 32, this spring will mobilize the bolt 30 in its locked position before the bolt 14 can be inserted into the space. In other words, the torsion spring 30 makes it impossible to insert the latch 14 into the space between the crosspiece, forming the notch 32 and the rib 1 b of the plug 1. To allow this introduction, the operator must compulsorily use the key 3 that is inserted in the cavity 5 and take it with the head 28 of the rotor 1 3 to draw the latter into rotation to meet the mobilization force of the spring of torsion 30 and allow the insertion of the latch 14 into the space in position andonce the stopper is resting on the frame 2, the operator releases the key 3 so that the torsion spring 30 automatically moves the latch 14 to its pick-up position under the notch 32. The presence of the chain 27 allows a Person who is inside the chamber of my rada exert a tensile force on the support 26 to drag in rotation the rotor 1 3 and the latch 14 to its unlocking position of the cap 1 of the frame 2. The support 26, by its curved free end 26b in abutment under the plug 1 by the torsion spring 30, in any way adjusts the latch 14 in its pick-up position under the notch 32.