EP3619381B1 - Locking mechanism with multiple stage locking verification - Google Patents
Locking mechanism with multiple stage locking verification Download PDFInfo
- Publication number
- EP3619381B1 EP3619381B1 EP18794292.5A EP18794292A EP3619381B1 EP 3619381 B1 EP3619381 B1 EP 3619381B1 EP 18794292 A EP18794292 A EP 18794292A EP 3619381 B1 EP3619381 B1 EP 3619381B1
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- EP
- European Patent Office
- Prior art keywords
- locking
- locking mechanism
- receiver base
- insert
- workspace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Images
Classifications
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B11/00—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts
- A44B11/25—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts with two or more separable parts
- A44B11/2503—Safety buckles
- A44B11/2507—Safety buckles actuated by a push-button
- A44B11/2515—Safety buckles actuated by a push-button acting parallel to the main plane of the buckle and perpendicularly to the direction of the fastening action
- A44B11/2519—Safety buckles actuated by a push-button acting parallel to the main plane of the buckle and perpendicularly to the direction of the fastening action with two buttons acting in opposite directions
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B11/00—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts
- A44B11/25—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts with two or more separable parts
- A44B11/2503—Safety buckles
- A44B11/2569—Safety measures
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
Definitions
- the subject matter pertains to locking mechanisms that have one and two-stage locking verification capabilities through mechanical and electro-mechanical means with two and three point unlocking means.
- Current known connectors can easily be bypassed.
- US 2017/000219A discloses a control docking station system for controlling locking engagement between a first female member and a male member that together form a locking mechanism.
- the first female member is connected to a safety device.
- the male member can be locked to and released from the first female member.
- the system includes a controller configured to sense an unsafe interlock signal.
- a second female member is operably connected to the controller's housing.
- Each female member includes a receiver base and a pair of pivoting locking tabs that is engageable with a key-like projection on the male member.
- the male member may be unlocked from the first female member when the controller senses an interruption to the unsafe interlock signal or if the unsafe interlock signal is overridden.
- the male member may be docked in the second female member during safe circumstances and/or the safety device is unused.
- the WO2017003545 discloses a similar system.
- EP 2607296A discloses a device for protecting a user of an aerial lift and an aerial lift including such a device.
- the device has a clothing element such as harness (100), vest, belt, bracelet, and helmet that is provided to be worn by the user (U).
- the clothing element is incorporated with a signaling mechanism connected to a controller of the lift.
- the signaling mechanism is provided with an element which is to be actuated by the user to trigger an emergency stop button (101) of the lift.
- the signaling mechanism is matched with the controller, which is specific to lift or group of lifts.
- the clothing element is provided with proximity sensor (105) to detect obstacle.
- the invention provides a locking mechanism in accordance with claim 1 of the appended claims.
- the invention further comprises a human lift system in accordance with claim 8 of the appended claims.
- the subject matter is directed to an improved locking mechanism that has mechanical (one stage) and electro/mechanical (two stage) locking verification. Further, among various embodiments, not forming part of the claimed invention, two and three point unlocking means are included.
- the mechanical parts include a receiver base, a pair of locking tabs, and an insert.
- Each locking tab has a first arm and a second arm where each arm is connected at a pivot point.
- Each locking tab is configured to pivot about the pivot point that is operatively connected to an upper portion of the receiver base in a spaced apart fashion to form a cavity between the receiver base and the locking tabs.
- a lower portion of the receiver base is configured to be operably engageable with a first device.
- a lower portion of the insert is configured to be received within a cavity and retained by at least the first arms of the locking tabs.
- An upper portion of the insert is configured to be operably engageable with a second device.
- the lower portion of the insert is retained by the receiver base and locking tabs. To disengage, both locking tabs must be rotated to dislodge the insert. Such disengagement is the two point mechanical unlocking method.
- Other parts include a push button assembly that has a retractable lip that is configured to engage with the receiver base and retains the second arms from the locking tabs from movement.
- the push button would need to be depressed and retract the lip from the receiver base and from the two second arms at the same time a force is applied to the locking tabs to rotate the arms of each locking tab to disengage the insert from the cavity.
- Such disengagement described herein is the three point mechanical unlocking method.
- the subject matter may further include electronic components including three magnetic actuators and corresponding electronic switches that signal change of state.
- the two second arms of the locking tabs and a leading edge of the insert respectively include the three magnetic actuators.
- the electronic switches which may be magnetically activated reed switches, signal status change to an external controller and, optionally, an external computer. Further, status signals and power signals may be routed through a steel cable or woven nylon harness that coupled the locking mechanism to a local anchor point. Change of status notification may be important on critical safety worksites where lack of mechanical and electronic connection can be life threatening.
- Locking mechanism 10 brings two devices together and maintains the connection until such time the connection is intentionally broken.
- Locking mechanism 10 includes a receiver base 12 , a pair of pivotable locking tabs 14 , and an insert 16 of which a portion is received within a cavity 18 of receiver base 12 and held in place by locking tabs 14 .
- An optional cover 20 may cover the majority of receiver base 12 and the majority of locking tabs 14 through fasteners 21 received into apertures 23 (such as those illustrated) or other commonly known fastener means,
- Receiver base 12 includes two spaced-apart and outwardly-projecting chocks 22 that conform to the shape of an interior surface 24 of locking tabs 14 and further define the boundaries of the cavity 18 in which a portion of insert 16 is received.
- Receiver base 12 also includes a lower section 26 that is configured to engage a first device.
- lower section 26 contains an opening 28 .
- the opening may be an elongated slot (as illustrated in FIGs. 1-3 and 5) to accommodate a safety strap 30 (see FIG. 2 for example) that is operatively connected to a first device, such as a safety harness for example. Opening 28 may be aligned below cavity 18 relative to centerline CL of receiver base 12 .
- Receiver base 12 may also include a generally central ledge 32 to which bottom portions 34 of the locking tabs rest against when in the locked position. Receiver base 12 may also include an optional central abutment member 36 to which a portion of insert 16 abuts when the insert is fully engaged and in the locked position relative to the receiver base and engaged by the locking tabs (as illustrated in FIG. 1 ).
- receiver base 12 has a planar back surface 38 (see FIG. 7 ).
- cover 20 also includes a smooth planar exterior surface 40 (see FIG. 6 ). When the cover is assembled onto the receiver base 12 , the two major surface of the assembled locking mechanism are smooth, planar, and parallel to each other (see for example FIGs. 10 and 16 ).
- Insert 16 may be in the form of a solid planar slab 42 having a lower portion that includes an external "key like" projection 44 having a leading edge 46 . Between projection 44 and an upper portion is a transition section 48 that forms a pocket 49 on each side of transition section 48 , In one form, the transition and the "key like" projection are received into cavity 18 of receiver base 12 along centerline CL when the insert is inserted into the receiver base in order to lock the locking mechanism. In the fully locked position, end surface 46 abuts the center ledge of the receiver base, or, alternatively, the central abutment member 36 as illustrated in FIG. 1 . Opposite end surface 46 within slab 42 is an opening 50 that engages an object, such as a safety strap like safety strap 30 . Opening 50 may be an elongated slot similar to opening 28 within receiver base 12 .
- Insert 16 is configured to be centerline-received into cavity 18 with "key like" projection 44 and at least part of transition section 48 being able to be inserted within cavity 18 formed by receiver base 12 , locking tabs 14 , and chocks 22 .
- leading edge 46 abuts central ledge 32 or central abutment 36 .
- Opening 50 within insert 16 is aligned above opening 28 of the lower portion of receiver base 12 .
- Locking tab 14 may be of various shapes.
- the locking tabs each have a first arm 17 and a second arm 19 extending outwardly from a central point (the pivot point) where the first arm, second arm and pivot may form a general "L" shape.
- the first arm engages the lower portion of the insert, i.e., the "key like” projection and at least a portion of transition section 48 .
- each locking tab has a top portion 52 that may be configured with a hook nose 54 , a side portion 56 , and bottom portion 34 (already introduced above).
- Each locking mechanism has an exterior surface 51 adjacent the pivot point.
- Top portion 52 , side portion 56 , and bottom portion 34 form an elongated "c-shaped" cavity 58 that corresponds to the shape of chock 22 .
- the locking tabs' outer surfaces (defined by the top portion, side portion, and bottom portion) have generally straight surfaces so that the exterior appears to be a partial rectangle.
- the second arm of each locking tab includes an upper surface 59 that is configured to contact leading edge 46 of insert 16 during unlocking.
- the second arm further includes a lower surface 61 that may rest on central ledge 32 of receiver base 12 when the locking mechanism is locked.
- a cylindrical post 60 is inserted axially through bottom portion 34 and operatively connected to receiver base 12 (such as press fit connected into a tapped and threaded hole (see FIG. 3 ) or through other standard fastening means well known in the industry).
- bottom portion 34 , side portion 56 , and top portion 52 with nose 54 pivot about cylinder post 60 and are rotationally limited by its corresponding chock 22 and central ledge 32 , as well as engagement with pocket 49 by nose 54 when insert projection 44 and at least a portion of the insert transition section 48 is inserted into cavity 18 .
- a torsion spring 62 is positioned between the receiver base and each locking tab about cylindrical post 60 ,
- Each torsion spring includes a first arm 64 extending from one end of the coiled spring that biases its respective locking tab and a second arm extending from the other end of the coiled spring that biases the adjacent chock 22 .
- the torsion spring for the right side locking tab is the mirror image of the torsion spring for the left side locking tab.
- the torsion spring allows rotational movement with an indented general arc on the back side of each locking tab about the pivot post (cylindrical post). The same general indented arc 67 , but on the front side of the locking tab is illustrated in FIGs. 2 and 3 .
- each first arm extends beyond outer edges of the receiver base.
- the extending first arms past the receiver base are visible to a worker or third parties.
- the outer edges of the insert, receiver base, and locking tabs may be chamfered to further reduce the potential of snags or hang ups.
- Cover 20 may be configured to leave the pivot corner of the locking tab, or at least exterior surface 51 of each locking tab 14 , exposed for easy access.
- Each top portion of the locking mechanism 52 / 54 engages one side of the insert projection 44 to retain and hold the insert projection within cavity 18 that is bordered by the receiver base, the chocks, and the first and second arms of each locking tab.
- a user applies force on exterior surface 51 located near the pivot point on each locking tab in order to cause rotational movement of each second arm of the locking tab relative to its corresponding first arm of the locking tab.
- the second arm applies a force on the insert projection leading edge 46 and the first arm no longer engages the sides of insert projection 44 .
- Exterior surface 51 may include knurling or other surface roughening for a worker to more easily engage the point of disconnection on locking tab.
- locking mechanism 10 may be used to connect two devices together through attachment of the two devices to the insert and the receiver base, respectively.
- Locking mechanism 10 is particularly well suited to joining a first device, such as a safety harness 120 worn by a worker, that includes or is connected to safety straps, webbing, or cable, or some form of connector, where the safety strap, webbing, cable, or connector engages the receiver base, such as through opening 28 .
- the insert such as through insert opening 50 , engages with a second device, such as a retractable lifeline 122 , that itself includes or is connected to safety straps, webbing, cable, or connector.
- Other engagement means can be used such as those illustrated in FIGs. 17 and 18 .
- locking mechanism 100 is directed to two-stage locking verification. Similar to locking mechanism 10 above with one-stage mechanical locking, second embodiment, not forming part of the claimed invention, 100 includes the same one-stage mechanical locking features above. The same numeral designations are used to describe the second embodiment, not forming part of the claimed invention, locking mechanism's mechanical locking functionality. That is that the second embodiment, not forming part of the claimed invention , locking mechanism includes a receiver base 12 , a pair of locking tabs 14 , an insert 16 .
- receiver base 12 also includes an electronic bay 102 that includes various electronic components to verify that insert 16 is fully engaged into cavity 18 and latched by locking tabs 14 .
- the electronic components send a signal to an external device (such as a computer) that determines whether the locking mechanism can open and release the insert through the first locking means.
- electronic components may include embedded reed switches 104 , a circuit board 105 , a relay 106 , embedded shielded proximity switches, a pressure switch that has mechanical engagement, an optical sensor, and optional indicator light (e.g., LED light) and a battery 108 , These are positioned within the electronic bay 102 .
- There are also magnetic actuators 110 preferably three, to match a corresponding reed switch 104 . Magnetic actuators 110 are positioned outside the electronic bay (see for example FIG. 21 ).
- the reed switches 104 may be a Hamlin 59010 Firecracker (3 mm dia., 9 mm long). They will be activated by the magnetic actuators placed in three locations opposite the reed switches. One location will be at the end of the insert, another under the left hand locking tab, and the remaining one under the right hand locking tab. All three switches will normally be in the open position until the magnetic actuator changes their state,
- a remote computer/processor processes the safe signal, that may be sent via a wireless antenna 112 (see e.g., FIG. 13 ), received with an aperture 111 within receiver base 12 , and will close the dry contacts, such as on a machine interface board (not illustrated).
- the sensed signal will block electrical signals to an affected machine control function (stage two).
- the locking mechanism 100 through mechanical closure, triggers a communication between the locking mechanism 100 to a machine (not illustrated) that may be attached to or a controller 124 (see e.g., FIG. 25 ) that may be interfaced with a machine or multiple machines or to a complete overall monitoring system.
- a machine not illustrated
- a controller 124 see e.g., FIG. 25
- the two-stage locking mechanism with verification capabilities is particularly useful for dangerous applications where human life (or safety) is at risk or where sensitive expensive equipment is at risk.
- One application for the two-stage locking mechanism 100 is between a worker in a safety harness 120 and a retractable lifeline 122 where an employer (or construction boss) needs to ascertain with more certainty whether it is safe for a worker to detach from a lifeline.
- the connection or disconnection can be signaled to a controller 124 , which can be forwarded to a computer device 126 that can be networked with an internal or external safety monitor command center (not illustrated).
- the locking mechanism ( 10 or 100 ) allows a worker to remove him or herself from a lifeline without removing the worker's safety harness.
- FIGs. 17 and 18 illustrate a different means for engaging a cable 68 or strap.
- the cable or strap ends are captured within an opening 70 that opens through the outer edge of the receiver base and/or insert as illustrated in FIG. 17 .
- Cable or strap 68 includes flexible expanding end portions 72 that can be inserted into opening 70 but cannot come out without cutting the cable/strap.
- cable ends can be epoxied or other permanent fastening means within opening 70 .
- FIGs. 20-24 disclose another alternate embodiment, not forming part of the claimed invention, locking mechanism 200 with either secondary or tertiary locking verification means.
- Locking mechanism 200 can be used in connection with the one-stage locking verification means found in locking mechanism 10 or used with locking mechanism 100 (two-stage locking verification means), depending on the type of application that is desired.
- Locking mechanism 200 contains a receiver base 12 , a pair of locking tabs 14 , and an insert 16 all like those elements described in detail above.
- Cover 20 ' however is different from cover 20 in that it is adapted to accommodate a centrally positioned push button mechanism 74 .
- Push button mechanism 74 includes a centrally positioned rod 76 that extends past the confines of a mechanism housing 75 to form ends 78 .
- the mechanism housing is operably connected to a spring 80 that is biased against the interior of the receiver base.
- a lower lip 82 extends from mechanism housing 75 that engages with a slot or indent within the receiver base 84 , such as on central abutment member 36 , ( FIG. 22 ).
- Lower lip 82 also is positioned directly above upper surface 59 of each locking tab lower arm. The physical relationship between the lower lip 82 and the locking tab lower arms, which may be touching but does not need to be, keeps the locking tabs from rotational movement until the button retracts the lower lip and the two locking tabs are rotated to disengage the insert projection from the cavity.
- Torsion springs 62 may be embedded under each locking tab to keep inward tension of the locking tabs.
- the torsion springs mount around a respective cylindrical post (or pivot pin) to tension the spring with regard to its corresponding locking tab so that a user would need to squeeze them with approximately 5 lbs of pressure in order to release (pivot) the locking tabs.
- the push button mechanism 74 along with the pivotable locking tabs act as a tertiary locking action to the two-stage locking verification means described to locking mechanism 100 (mechanical locking of the insert in the first stage, and electronic locking means of the second stage).
- the push button must be depressed at the same time as depressing the locking tabs in order to pivot the locking tabs to disconnect (unlock) the insert from the locking tabs and receiver base cavity.
- the push button and two locking tabs form a three point contact before locking or unlocking can take place.
- the locking mechanisms 10 , 100 , 200 may be made of metal or man-made materials. In one form, locking mechanisms 10 , 100 , and 200 are made of aluminum. In another form they are made from carbon fiber as a strong, yet lightweight, alternative.
- FIGs. 26-28 show additional possibilities, whereby only the embodiment of FIG.26 forms part of the claimed invention , that take advantage of remote signal processing for determining the status of the locking mechanisms via communications signals that are transmitted and received through an attached cable.
- electronic circuitry may be used to determine whether specific locking points have been perfected, thereby ensuring the locking mechanism is properly secured.
- the various electronic circuitry may further receive power and be in communication with at attached umbilical cord that may or may not be part of an overall harness system,
- FIG. 26 is a perspective view of a locking mechanism system 700 having a steel rope harness 702 attached to a locking mechanism 701 according to an embodiment, of the subject matter disclosed herein.
- the harness 702 refers to the attachment assembly or linking member that may be coupled to the locking mechanism 701 on one end as well as attached to an anchor point (e.g., a railing of a human lift system) at some location remote form the locking mechanism 701 .
- the harness 702 includes the components of FIG. 26 except for the locking mechanism 701 itself.
- the locking mechanism 701 mat be any one of the embodiments described previously, e,g., locking mechanisms 10 , 100 and 200 .
- the harness 702 in this embodiment, includes a steel rope 715 that is removably coupled to an assembly attachment point 710 on the locking mechanism 701 , In other embodiments, this coupling may be permanent and integral with the locking mechanism 701 .
- the harness 702 may further include a means for attaching the harness to an anchor point, such as a railing of a human lift system, railing of scaffolding, or wall or roof of a building.
- an anchor point such as a railing of a human lift system, railing of scaffolding, or wall or roof of a building.
- the steel rope 715 culminates in a loop 720 that may be engaged with a carabineer 721 .
- any means of attachment or anchoring may be realized and that the length of the steel rope 715 may be longer than depicted in FIG. 26
- the harness 702 and the locking mechanism 701 completes the locking mechanism system 700 such that a person who engages the locking mechanism system may be protected from falls from high places, such as a scaffolding (not shown) or human lift device (not shown).
- the harness includes a signal cable 725 that culminates in a connector 726 .
- the signal cable 725 is disposed inside the steel rope 715 for a sizable length of the harness 702 .
- the steel rope 715 includes an exit point 716 for the signal cable 725 to no longer be disposed within the steel rope 715 .
- the signal cable 725 is protected inside the steel rope 715 portion of the harness 702 so that the signal cable 725 will avoid being pulled the way that the steel rope 715 may be pulled when preventing accidentals falls and the like. That is, the steel rope 715 will provide tensile strength for the harness 702 and will avoid breaking or otherwise compromising the signal cable 725 as it is protected inside the steel rope 715 . In this manner, signals may be transmitted to and from the locking mechanism 701 to the signal cable connector 726 .
- the signal cable connector 726 is configured to be interfaced with some manner of control system or monitor system (e.g., local or remote controller) that is remote from the locking mechanism 701 .
- the remote monitor system (not shown) may provide one or more power signals to the locking mechanism 701 for powering various on-board circuitry. Further, or even alternatively, the remote system may deliver low-power control signals or monitor signals that are used to determine of the various switches disposed in the locking mechanism indicate that the locking mechanism is properly engaged with an inserted device, thereby ensuring that the overall locking mechanism system is properly engaged.
- a monitor circuit may include a signal source located remotely (with respect to the locking mechanism 701 ) that may send a signal to the indicator switches inside the locking mechanism (two or three, depending on the embodiment as discussed previously).
- the circuit is "made up" and the remote system receives the return signal indicating that the locking mechanism 701 is properly engaged. If the signal is not returned and the circuit remains open due to one or more indicator switches remaining open, then the remote system determines that the insert device is improperly engaged.
- FIG. 27 is a perspective view of a locking mechanism system 800 having a nylon webbing harness 802 attached to a locking mechanism 801 according to an embodiment , not forming part of the claimed invention, of the subject matter disclosed herein.
- the harness 802 refers to the attachment assembly that may be coupled to the locking mechanism 801 on one end as well as attached to an anchor point ( e.g. , a railing of a human lift system) at some location remote from the locking mechanism 801 .
- the locking mechanism 801 mat be any one of the embodiments, not forming part of the claimed invention, described previously, e.g., locking mechanisms 10 , 100 and 200 .
- the harness 802 in this embodiment, not forming part of the claimed invention, includes a woven nylon member 815 that is removably coupled to an assembly attachment point 810 on the locking mechanism 801 .
- the harness 802 may further include a means for attaching the harness to an anchor point, such as a railing of a human lift system, railing of scaffolding, or wall or roof of a building.
- an anchor point such as a railing of a human lift system, railing of scaffolding, or wall or roof of a building.
- the woven nylon member 815 culminates in a loop 816 .
- any means of attachment or anchoring may be realized and that the length of the woven nylon member 815 may be longer than depicted in FIG. 27 .
- the harness 802 and the locking mechanism 801 completes the locking mechanism system 800 such that a person who engages the locking mechanism system 800 may be protected from falls from high places, such as a scaffolding (not shown) or human lift device (not shown).
- the harness 802 may further include a signal cable 825 that culminates in a connector 826 .
- the signal cable 825 may be disposed along side the woven nylon member 815 for the entire length of the harness 802 with a little bit of length to spare when compared to the length of the woven nylon member 815 .
- the signal cable 825 is protected by the woven nylon member 815 portion of the harness 802 because the signal cable 825 will avoid being pulled the way that the woven nylon member 815 may be pulled when preventing accidentals falls and the like. That is, the woven nylon member 815 will provide tensile strength for the harness 802 and will avoid breaking or otherwise compromising the signal cable 825.
- signals may be transmitted to and from the locking mechanism 801 to the signal cable connector 82 through a signal cable port 827 .
- the signal cable connector 826 operates in a similar manner to the signal cable 825 / signal connector 826 tandem as discussed above with respect to FIG. 26 .
- FIG. 28 is a system view of a human lift device 900 that utilizes the locking mechanism system from FIG.26 according to an embodiment of the invention.
- the system 900 includes a basket 910 or personnel workspace that may be lifted into the air from a lift mechanism (not shown) via a boom arm 930 .
- a worker may be lifted to a work area.
- the worker will latch into one or more locking mechanisms 701 .
- FIG. 28 four locking mechanisms 701 along with four respective steel ropes 715 are shown.
- the basket includes safety railing to assist with keeping workers safely in the workspace.
- the steel ropes 715 may be anchored to the one or more railings or one or more secure and stationary portions of the basket 910 .
- each signal cable joins a larger signal cable run 921 that connects to a remote controller at the other end of the boom arm 930. As such, the remote controller may similarly be locked out of operation until one or more locking mechanisms 701 indicate correct insertion with a safety device.
- the overall system 900 is further understood with respect to the system block diagram of FIG. 29 .
- FIG. 29 is a block diagram 950 of the human lift device system of FIG. 28 according to an embodiment, not forming part of the claimed invention, of the subject matter disclosed herein.
- the system includes one or more locking mechanisms 701a, 701b, - 701n.
- Each respective locking mechanism may be communicatively coupled to a local controller 920.
- the local controller 920 is configured to send a signal to each locking mechanism. If each indicator switch is closed (indicative of an insert device properly engaged with the locking mechanism), then a return signal is sensed through a series circuit that is completed.
- the local controller 920 may be configured to be locked out if none of the locking mechanisms 701a, 701b,- - 701n indicate being properly engaged. In other embodiments, not forming part of the claimed invention, the local controller 920 may be locked out is any one of the locking mechanisms 701a, 701b, - 701n does not indicate a complete signal circuit.
- each respective locking mechanism 701a, 701b, - 701n may be communicatively coupled to a remote controller 960.
- the remote controller 960 is also configured to send a signal to each locking mechanism. If each indicator switch is closed (indicative of an insert device properly engaged with the locking mechanism), then a return signal is sensed through a series circuit that is completed.
- the remote controller 960 may be configured to be locked out if none of the locking mechanisms 701a, 701b, - 701n indicate being properly engaged. In other embodiments, not forming part of the claimed invention, the remote controller 960 may be locked out is any one of the locking mechanisms 701a, 701b, - 701n does not indicate a complete signal circuit.
- the signals may be routed through the local controller 920 such that both the remote controller 960 and the local controller 920 are enabled or locked out in unison.
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Description
- The subject matter pertains to locking mechanisms that have one and two-stage locking verification capabilities through mechanical and electro-mechanical means with two and three point unlocking means.
- A need exists for an improved locking mechanism, particularly with a two-stage locking verification for dangerous applications such as releasing a worker strapped into a safety harness from a lifeline. Current known connectors can easily be bypassed.
-
US 2017/000219A discloses a control docking station system for controlling locking engagement between a first female member and a male member that together form a locking mechanism. The first female member is connected to a safety device. The male member can be locked to and released from the first female member. The system includes a controller configured to sense an unsafe interlock signal. A second female member is operably connected to the controller's housing. Each female member includes a receiver base and a pair of pivoting locking tabs that is engageable with a key-like projection on the male member. The male member may be unlocked from the first female member when the controller senses an interruption to the unsafe interlock signal or if the unsafe interlock signal is overridden. The male member may be docked in the second female member during safe circumstances and/or the safety device is unused. - The
WO2017003545 discloses a similar system. -
EP 2607296A discloses a device for protecting a user of an aerial lift and an aerial lift including such a device. The device has a clothing element such as harness (100), vest, belt, bracelet, and helmet that is provided to be worn by the user (U). The clothing element is incorporated with a signaling mechanism connected to a controller of the lift. The signaling mechanism is provided with an element which is to be actuated by the user to trigger an emergency stop button (101) of the lift. The signaling mechanism is matched with the controller, which is specific to lift or group of lifts. The clothing element is provided with proximity sensor (105) to detect obstacle. - The invention provides a locking mechanism in accordance with
claim 1 of the appended claims. The invention further comprises a human lift system in accordance with claim 8 of the appended claims. - The subject matter is directed to an improved locking mechanism that has mechanical (one stage) and electro/mechanical (two stage) locking verification. Further, among various embodiments, not forming part of the claimed invention, two and three point unlocking means are included.
- The mechanical parts include a receiver base, a pair of locking tabs, and an insert. Each locking tab has a first arm and a second arm where each arm is connected at a pivot point. Each locking tab is configured to pivot about the pivot point that is operatively connected to an upper portion of the receiver base in a spaced apart fashion to form a cavity between the receiver base and the locking tabs.
- A lower portion of the receiver base is configured to be operably engageable with a first device. A lower portion of the insert is configured to be received within a cavity and retained by at least the first arms of the locking tabs. An upper portion of the insert is configured to be operably engageable with a second device. The lower portion of the insert is retained by the receiver base and locking tabs. To disengage, both locking tabs must be rotated to dislodge the insert. Such disengagement is the two point mechanical unlocking method.
- Other parts include a push button assembly that has a retractable lip that is configured to engage with the receiver base and retains the second arms from the locking tabs from movement. Here, the push button would need to be depressed and retract the lip from the receiver base and from the two second arms at the same time a force is applied to the locking tabs to rotate the arms of each locking tab to disengage the insert from the cavity. Such disengagement described herein is the three point mechanical unlocking method.
- The subject matter may further include electronic components including three magnetic actuators and corresponding electronic switches that signal change of state. The two second arms of the locking tabs and a leading edge of the insert respectively include the three magnetic actuators. The electronic switches, which may be magnetically activated reed switches, signal status change to an external controller and, optionally, an external computer. Further, status signals and power signals may be routed through a steel cable or woven nylon harness that coupled the locking mechanism to a local anchor point. Change of status notification may be important on critical safety worksites where lack of mechanical and electronic connection can be life threatening.
- These and other advantages will become more apparent upon review of the Drawings, the Detailed Description, and the Claims.
- Like reference numerals are used to designate like parts throughout the several view of the drawings, wherein:
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FIG. 1 is a front perspective view of an assembled locking mechanism disclosing a receiver base, a pair of pivotable locking tabs about respective cylindrical posts, and an insert (illustrated without a cover) according to an embodiment of the subject matter disclosed herein; -
FIG. 2 is a front view ofFIG. 1 with the pair of pivotable locking tabs pivoted to release the insert according to the subject matter disclosed herein; -
FIG. 3 is an exploded front perspective view like that ofFIG. 1 except illustrated rotated 150 degrees and better illustrating a pair of pivot cylinders to which the locking tabs pivot about according to the subject matter disclosed herein; -
FIG. 4 is a front perspective view of the insert according to the subject matter disclosed herein; -
FIG. 5 is a front perspective view of the receiver base according to the subject matter disclosed herein; -
FIG. 6 is a front perspective view of a cover that covers over most of the receiver base when assembled according to the subject matter disclosed herein; -
FIG. 7 is a back view of the assembled locking mechanism ofFIG. 1 according to the subject matter disclosed herein; -
FIG. 8 is a rear perspective view of the assembled receiver base, locking tabs, and insert member according to the subject matter disclosed herein; -
FIG. 9 is an exploded rear view of the receiver base, the insert, and the locking tabs and the cylindrical posts ofFIG. 1 according to the subject matter disclosed herein: -
FIG. 10 is a front perspective view of the locking assembly with the cover placed over the receiver base and the locking tabs according to the subject matter disclosed herein; -
FIG. 11 is an exploded front perspective view of the locking assembly ofFIG. 10 according to the subject matter disclosed herein; -
FIG. 12 is an assembled front perspective view of a locking mechanism illustrating a receiver base, a pair of pivoting locking tabs, an insert, and an electronic bay with electronic components to provide a second stage of locking the locking mechanism (illustrated without a cover) according to the subject matter disclosed herein; -
FIG. 13 is a front view of the locking mechanism ofFIG. 12 according to the subject matter disclosed herein; -
FIG. 14 is a front exploded view of the insert removed from the receiver base and the pivotable locking tabs pivoted to allow release of the insert according to the subject matter disclosed herein; -
FIG. 15 is a rear view of the receiver base ofFIG. 13 according to the subject matter disclosed herein; -
FIG. 16 is an exploded side view of the insert attached to a strap, the receiver base attached to a strap, and the cover; -
FIG. 17 is a schematic view of an alternate strap attachment means according to the subject matter disclosed herein; -
FIG. 18 is a schematic view of a cable that may be received by the alternate attachment means disclosed inFIG. 17 according to the subject matter disclosed herein; -
FIG. 19 is a schematic solid state wiring diagram of the electronic components of the harness side Bluetooth board according to the subject matter disclosed herein; -
FIG. 20 is a front view of an another alternate secondary or tertiary locking element with an optional press button mechanism according to the subject matter disclosed herein; -
FIG. 21 is an exploded front view ofFIG. 20 according to the subject matter disclosed herein; -
FIG. 22 is a bottom exploded view ofFIG. 20 according to the subject matter disclosed herein; -
FIG. 23 is an enlarged bottom perspective view of the press button mechanism ofFIG. 20 according to the subject matter disclosed herein; -
FIG. 24 is an enlarged top perspective view of the press button mechanism ofFig. 20 according to the subject matter disclosed herein; -
FIG. 25 is a schematic view of the locking mechanism connecting two devices together and electronically connected to a controller for communicating signals to an optional computer when the connection is broken according to the subject matter disclosed herein;-
FIG. 26 is a perspective view of a locking mechanism system having a steel cable harness attached thereto according to an embodiment of the invention; -
FIG. 27 is a perspective view of a locking mechanism system having a nylon webbing harness attached thereto according to an embodiment, not forming part of the claimed invention; -
FIG. 28 is a system view of a human lift device that utilizes one or more of the locking mechanism systems fromFIGs. 26 or 27 according to the subject matter disclosed herein; and -
FIG. 29 is a block diagram of the human lift device system ofFIG. 28 according to the subject matter disclosed herein.
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- Referring to
FIGs. 1-11 and 16,locking mechanism 10 brings two devices together and maintains the connection until such time the connection is intentionally broken. Lockingmechanism 10 includes areceiver base 12, a pair ofpivotable locking tabs 14, and aninsert 16 of which a portion is received within acavity 18 ofreceiver base 12 and held in place by lockingtabs 14. An optional cover 20 (FIGs. 6 , 10) may cover the majority ofreceiver base 12 and the majority of lockingtabs 14 throughfasteners 21 received into apertures 23 (such as those illustrated) or other commonly known fastener means, -
Receiver base 12 includes two spaced-apart and outwardly-projectingchocks 22 that conform to the shape of aninterior surface 24 of lockingtabs 14 and further define the boundaries of thecavity 18 in which a portion ofinsert 16 is received.Receiver base 12 also includes alower section 26 that is configured to engage a first device. According to one embodiment, not forming part of the claimed invention,lower section 26 contains anopening 28. The opening may be an elongated slot (as illustrated inFIGs. 1-3 and 5) to accommodate a safety strap 30 (seeFIG. 2 for example) that is operatively connected to a first device, such as a safety harness for example.Opening 28 may be aligned belowcavity 18 relative to centerline CL ofreceiver base 12. -
Receiver base 12 may also include a generallycentral ledge 32 to whichbottom portions 34 of the locking tabs rest against when in the locked position.Receiver base 12 may also include an optionalcentral abutment member 36 to which a portion ofinsert 16 abuts when the insert is fully engaged and in the locked position relative to the receiver base and engaged by the locking tabs (as illustrated inFIG. 1 ). - According to one aspect of one embodiment, not forming part of the claimed invention,
receiver base 12 has a planar back surface 38 (seeFIG. 7 ). In one form, cover 20 also includes a smooth planar exterior surface 40 (seeFIG. 6 ). When the cover is assembled onto thereceiver base 12, the two major surface of the assembled locking mechanism are smooth, planar, and parallel to each other (see for exampleFIGs. 10 and16 ). -
Insert 16 may be in the form of a solidplanar slab 42 having a lower portion that includes an external "key like"projection 44 having a leadingedge 46. Betweenprojection 44 and an upper portion is atransition section 48 that forms apocket 49 on each side oftransition section 48, In one form, the transition and the "key like" projection are received intocavity 18 ofreceiver base 12 along centerline CL when the insert is inserted into the receiver base in order to lock the locking mechanism. In the fully locked position,end surface 46 abuts the center ledge of the receiver base, or, alternatively, thecentral abutment member 36 as illustrated inFIG. 1 . Oppositeend surface 46 withinslab 42 is anopening 50 that engages an object, such as a safety strap likesafety strap 30.Opening 50 may be an elongated slot similar to opening 28 withinreceiver base 12. -
Insert 16 is configured to be centerline-received intocavity 18 with "key like"projection 44 and at least part oftransition section 48 being able to be inserted withincavity 18 formed byreceiver base 12, lockingtabs 14, and chocks 22. In one form, leadingedge 46 abutscentral ledge 32 orcentral abutment 36.Opening 50 withininsert 16 is aligned above opening 28 of the lower portion ofreceiver base 12. - Locking
tab 14 may be of various shapes. The locking tabs each have afirst arm 17 and asecond arm 19 extending outwardly from a central point (the pivot point) where the first arm, second arm and pivot may form a general "L" shape. The first arm engages the lower portion of the insert, i.e., the "key like" projection and at least a portion oftransition section 48. According to one embodiment, not forming part of the claimed invention, each locking tab has atop portion 52 that may be configured with ahook nose 54, aside portion 56, and bottom portion 34 (already introduced above). Each locking mechanism has anexterior surface 51 adjacent the pivot point.Top portion 52,side portion 56, andbottom portion 34 form an elongated "c-shaped"cavity 58 that corresponds to the shape ofchock 22. In one form, the locking tabs' outer surfaces (defined by the top portion, side portion, and bottom portion) have generally straight surfaces so that the exterior appears to be a partial rectangle. The second arm of each locking tab includes an upper surface 59 that is configured to contact leadingedge 46 ofinsert 16 during unlocking. The second arm further includes alower surface 61 that may rest oncentral ledge 32 ofreceiver base 12 when the locking mechanism is locked. - A
cylindrical post 60 is inserted axially throughbottom portion 34 and operatively connected to receiver base 12 (such as press fit connected into a tapped and threaded hole (seeFIG. 3 ) or through other standard fastening means well known in the industry). In this way,bottom portion 34,side portion 56, andtop portion 52 withnose 54 pivot aboutcylinder post 60 and are rotationally limited by its correspondingchock 22 andcentral ledge 32, as well as engagement withpocket 49 bynose 54 wheninsert projection 44 and at least a portion of theinsert transition section 48 is inserted intocavity 18. - A
torsion spring 62 is positioned between the receiver base and each locking tab aboutcylindrical post 60, Each torsion spring includes afirst arm 64 extending from one end of the coiled spring that biases its respective locking tab and a second arm extending from the other end of the coiled spring that biases theadjacent chock 22. The torsion spring for the right side locking tab is the mirror image of the torsion spring for the left side locking tab. The torsion spring allows rotational movement with an indented general arc on the back side of each locking tab about the pivot post (cylindrical post). The same generalindented arc 67, but on the front side of the locking tab is illustrated inFIGs. 2 and3 . - When the locking mechanism is in the fully locked position (see
FIG. 10 ), the exposed parts are mostly planar, which makes the locking mechanism less likely to get snagged or hooked during use. When the locking mechanism is unlocked, each first arm extends beyond outer edges of the receiver base. The extending first arms past the receiver base (see e.g.,FIG. 14 ) are visible to a worker or third parties. Further, the outer edges of the insert, receiver base, and locking tabs may be chamfered to further reduce the potential of snags or hang ups.Cover 20 may be configured to leave the pivot corner of the locking tab, or at leastexterior surface 51 of each lockingtab 14, exposed for easy access. - Each top portion of the
locking mechanism 52/54 engages one side of theinsert projection 44 to retain and hold the insert projection withincavity 18 that is bordered by the receiver base, the chocks, and the first and second arms of each locking tab. To disconnect (unlock) the insert from the cavity, a user applies force onexterior surface 51 located near the pivot point on each locking tab in order to cause rotational movement of each second arm of the locking tab relative to its corresponding first arm of the locking tab. The second arm applies a force on the insertprojection leading edge 46 and the first arm no longer engages the sides ofinsert projection 44.Exterior surface 51 may include knurling or other surface roughening for a worker to more easily engage the point of disconnection on locking tab. - In use, as illustrated in
FIG. 25 ,locking mechanism 10 may be used to connect two devices together through attachment of the two devices to the insert and the receiver base, respectively. Lockingmechanism 10 is particularly well suited to joining a first device, such as asafety harness 120 worn by a worker, that includes or is connected to safety straps, webbing, or cable, or some form of connector, where the safety strap, webbing, cable, or connector engages the receiver base, such as throughopening 28. The insert, such as throughinsert opening 50, engages with a second device, such as aretractable lifeline 122, that itself includes or is connected to safety straps, webbing, cable, or connector. Other engagement means can be used such as those illustrated inFIGs. 17 and 18 . - Referring now to
FIGs. 12-15 and 19, a second embodiment, not forming part of the claimed invention,locking mechanism 100 is directed to two-stage locking verification. Similar to lockingmechanism 10 above with one-stage mechanical locking, second embodiment, not forming part of the claimed invention, 100 includes the same one-stage mechanical locking features above. The same numeral designations are used to describe the second embodiment, not forming part of the claimed invention, locking mechanism's mechanical locking functionality. That is that the second embodiment, not forming part of the claimed invention, locking mechanism includes areceiver base 12, a pair of lockingtabs 14, aninsert 16. - However,
receiver base 12 also includes anelectronic bay 102 that includes various electronic components to verify thatinsert 16 is fully engaged intocavity 18 and latched by lockingtabs 14. The electronic components send a signal to an external device (such as a computer) that determines whether the locking mechanism can open and release the insert through the first locking means. - Referring also to
FIG. 19 , electronic components may include embeddedreed switches 104, acircuit board 105, arelay 106, embedded shielded proximity switches, a pressure switch that has mechanical engagement, an optical sensor, and optional indicator light (e.g., LED light) and abattery 108, These are positioned within theelectronic bay 102. There are alsomagnetic actuators 110, preferably three, to match a correspondingreed switch 104.Magnetic actuators 110 are positioned outside the electronic bay (see for exampleFIG. 21 ). - The reed switches 104 may be a Hamlin 59010 Firecracker (3 mm dia., 9 mm long). They will be activated by the magnetic actuators placed in three locations opposite the reed switches. One location will be at the end of the insert, another under the left hand locking tab, and the remaining one under the right hand locking tab. All three switches will normally be in the open position until the magnetic actuator changes their state,
- After all three switches are closed by the mechanical action of inserting the insert into the receiver base cavity (one-stage locking), then the electronic components will receive electrical energy from the battery. After the electronic components have communicated via various protocols, such as Bluetooth, near field communication, RFID, Zigbee, or other wireless communication means, that the mechanical (stage one) locking has taken place, a remote computer/processor processes the safe signal, that may be sent via a wireless antenna 112 (see e.g.,
FIG. 13 ), received with an aperture 111 withinreceiver base 12, and will close the dry contacts, such as on a machine interface board (not illustrated). The sensed signal will block electrical signals to an affected machine control function (stage two). Here, in the second stage, thelocking mechanism 100, through mechanical closure, triggers a communication between thelocking mechanism 100 to a machine (not illustrated) that may be attached to or a controller 124 (see e.g.,FIG. 25 ) that may be interfaced with a machine or multiple machines or to a complete overall monitoring system. - The two-stage locking mechanism with verification capabilities (e.g., remote processor signaling) is particularly useful for dangerous applications where human life (or safety) is at risk or where sensitive expensive equipment is at risk. One application for the two-
stage locking mechanism 100 is between a worker in asafety harness 120 and aretractable lifeline 122 where an employer (or construction boss) needs to ascertain with more certainty whether it is safe for a worker to detach from a lifeline. The connection or disconnection can be signaled to acontroller 124, which can be forwarded to acomputer device 126 that can be networked with an internal or external safety monitor command center (not illustrated). Further, the locking mechanism ( 10 or 100) allows a worker to remove him or herself from a lifeline without removing the worker's safety harness. -
FIGs. 17 and 18 illustrate a different means for engaging acable 68 or strap. Instead of a safety strap being threaded betweenopenings opening 70 that opens through the outer edge of the receiver base and/or insert as illustrated inFIG. 17 . Cable orstrap 68 includes flexible expandingend portions 72 that can be inserted into opening 70 but cannot come out without cutting the cable/strap. Alternatively, cable ends can be epoxied or other permanent fastening means withinopening 70. -
FIGs. 20-24 disclose another alternate embodiment, not forming part of the claimed invention,locking mechanism 200 with either secondary or tertiary locking verification means.Locking mechanism 200 can be used in connection with the one-stage locking verification means found in lockingmechanism 10 or used with locking mechanism 100 (two-stage locking verification means), depending on the type of application that is desired.Locking mechanism 200 contains areceiver base 12, a pair of lockingtabs 14, and aninsert 16 all like those elements described in detail above. Cover 20' however is different fromcover 20 in that it is adapted to accommodate a centrally positionedpush button mechanism 74. -
Push button mechanism 74 includes a centrally positionedrod 76 that extends past the confines of amechanism housing 75 to form ends 78. The mechanism housing is operably connected to aspring 80 that is biased against the interior of the receiver base. - During locking action, a
lower lip 82 extends frommechanism housing 75 that engages with a slot or indent within thereceiver base 84, such as oncentral abutment member 36, (FIG. 22 ).Lower lip 82 also is positioned directly above upper surface 59 of each locking tab lower arm. The physical relationship between thelower lip 82 and the locking tab lower arms, which may be touching but does not need to be, keeps the locking tabs from rotational movement until the button retracts the lower lip and the two locking tabs are rotated to disengage the insert projection from the cavity. - Torsion springs 62, as discussed above, may be embedded under each locking tab to keep inward tension of the locking tabs. The torsion springs mount around a respective cylindrical post (or pivot pin) to tension the spring with regard to its corresponding locking tab so that a user would need to squeeze them with approximately 5 lbs of pressure in order to release (pivot) the locking tabs.
- When pressing the
push button mechanism 74, it retracts thelower lip 82 and, therefore, disengages with the indent orslot 84 inreceiver base 12 and no longer stops the lower arms of the locking tabs from rotation (and displacement of the leading edge of the insert). Then a user may squeeze on the two locking tabs at the same Lime as the push button is depressed to effectuate three point mechanical unlocking of thelocking mechanism 10. - If used with the
locking mechanism 100, thepush button mechanism 74 along with the pivotable locking tabs act as a tertiary locking action to the two-stage locking verification means described to locking mechanism 100 (mechanical locking of the insert in the first stage, and electronic locking means of the second stage). In this embodiment, , not forming part of the claimed invention, the push button must be depressed at the same time as depressing the locking tabs in order to pivot the locking tabs to disconnect (unlock) the insert from the locking tabs and receiver base cavity. The push button and two locking tabs form a three point contact before locking or unlocking can take place. - The locking
mechanisms mechanisms -
FIGs. 26-28 show additional possibilities, whereby only the embodiment ofFIG.26 forms part of the claimed invention, that take advantage of remote signal processing for determining the status of the locking mechanisms via communications signals that are transmitted and received through an attached cable. In various embodiments, not forming part of the claimed invention, discussed above, electronic circuitry may be used to determine whether specific locking points have been perfected, thereby ensuring the locking mechanism is properly secured. In the embodiment, not forming part of the claimed invention, that follow, the various electronic circuitry may further receive power and be in communication with at attached umbilical cord that may or may not be part of an overall harness system, -
FIG. 26 is a perspective view of alocking mechanism system 700 having asteel rope harness 702 attached to alocking mechanism 701 according to an embodiment, of the subject matter disclosed herein. As used herein, theharness 702 refers to the attachment assembly or linking member that may be coupled to thelocking mechanism 701 on one end as well as attached to an anchor point (e.g., a railing of a human lift system) at some location remote form thelocking mechanism 701. Theharness 702, as used herein includes the components ofFIG. 26 except for thelocking mechanism 701 itself. Further, thelocking mechanism 701 mat be any one of the embodiments described previously, e,g., lockingmechanisms harness 702, in this embodiment, includes asteel rope 715 that is removably coupled to anassembly attachment point 710 on thelocking mechanism 701, In other embodiments, this coupling may be permanent and integral with thelocking mechanism 701. - The
harness 702 may further include a means for attaching the harness to an anchor point, such as a railing of a human lift system, railing of scaffolding, or wall or roof of a building. In this embodiment, not forming part of the claimed invention, thesteel rope 715 culminates in aloop 720 that may be engaged with acarabineer 721. A skilled artisan understands that any means of attachment or anchoring may be realized and that the length of thesteel rope 715 may be longer than depicted inFIG. 26 Together, theharness 702 and thelocking mechanism 701 completes thelocking mechanism system 700 such that a person who engages the locking mechanism system may be protected from falls from high places, such as a scaffolding (not shown) or human lift device (not shown). - The harness includes a
signal cable 725 that culminates in aconnector 726. Thesignal cable 725 is disposed inside thesteel rope 715 for a sizable length of theharness 702. Thesteel rope 715 includes anexit point 716 for thesignal cable 725 to no longer be disposed within thesteel rope 715. In this manner, thesignal cable 725 is protected inside thesteel rope 715 portion of theharness 702 so that thesignal cable 725 will avoid being pulled the way that thesteel rope 715 may be pulled when preventing accidentals falls and the like. That is, thesteel rope 715 will provide tensile strength for theharness 702 and will avoid breaking or otherwise compromising thesignal cable 725 as it is protected inside thesteel rope 715. In this manner, signals may be transmitted to and from thelocking mechanism 701 to thesignal cable connector 726. - The
signal cable connector 726 is configured to be interfaced with some manner of control system or monitor system (e.g., local or remote controller) that is remote from thelocking mechanism 701. Thus, the remote monitor system (not shown) may provide one or more power signals to thelocking mechanism 701 for powering various on-board circuitry. Further, or even alternatively, the remote system may deliver low-power control signals or monitor signals that are used to determine of the various switches disposed in the locking mechanism indicate that the locking mechanism is properly engaged with an inserted device, thereby ensuring that the overall locking mechanism system is properly engaged. Thus, a monitor circuit may include a signal source located remotely (with respect to the locking mechanism 701) that may send a signal to the indicator switches inside the locking mechanism (two or three, depending on the embodiment as discussed previously). If each of the indicator switches in the series in in a closed state, then the circuit is "made up" and the remote system receives the return signal indicating that thelocking mechanism 701 is properly engaged. If the signal is not returned and the circuit remains open due to one or more indicator switches remaining open, then the remote system determines that the insert device is improperly engaged. -
FIG. 27 is a perspective view of alocking mechanism system 800 having anylon webbing harness 802 attached to alocking mechanism 801 according to an embodiment , not forming part of the claimed invention, of the subject matter disclosed herein. As used previously, theharness 802 refers to the attachment assembly that may be coupled to thelocking mechanism 801 on one end as well as attached to an anchor point (e.g., a railing of a human lift system) at some location remote from thelocking mechanism 801. Further, thelocking mechanism 801 mat be any one of the embodiments, not forming part of the claimed invention, described previously, e.g., lockingmechanisms harness 802, in this embodiment, not forming part of the claimed invention, includes a wovennylon member 815 that is removably coupled to anassembly attachment point 810 on thelocking mechanism 801. - The
harness 802 may further include a means for attaching the harness to an anchor point, such as a railing of a human lift system, railing of scaffolding, or wall or roof of a building. In this embodiment, not forming part of the claimed invention, the wovennylon member 815 culminates in a loop 816. A skilled artisan understands that any means of attachment or anchoring may be realized and that the length of the wovennylon member 815 may be longer than depicted inFIG. 27 . Together, theharness 802 and thelocking mechanism 801 completes thelocking mechanism system 800 such that a person who engages thelocking mechanism system 800 may be protected from falls from high places, such as a scaffolding (not shown) or human lift device (not shown). - The
harness 802 may further include asignal cable 825 that culminates in aconnector 826. Thesignal cable 825 may be disposed along side the wovennylon member 815 for the entire length of theharness 802 with a little bit of length to spare when compared to the length of the wovennylon member 815. In this manner, thesignal cable 825 is protected by the wovennylon member 815 portion of theharness 802 because thesignal cable 825 will avoid being pulled the way that the wovennylon member 815 may be pulled when preventing accidentals falls and the like. That is, the wovennylon member 815 will provide tensile strength for theharness 802 and will avoid breaking or otherwise compromising thesignal cable 825. In this manner, signals may be transmitted to and from thelocking mechanism 801 to thesignal cable connector 82 through asignal cable port 827. Thesignal cable connector 826 operates in a similar manner to thesignal cable 825/signal connector 826 tandem as discussed above with respect toFIG. 26 . -
FIG. 28 is a system view of ahuman lift device 900 that utilizes the locking mechanism system fromFIG.26 according to an embodiment of the invention. In this embodiment, e.g., thesystem 900 includes abasket 910 or personnel workspace that may be lifted into the air from a lift mechanism (not shown) via aboom arm 930. In this manner, a worker may be lifted to a work area. For safety, the worker will latch into one ormore locking mechanisms 701. InFIG. 28 , four lockingmechanisms 701 along with fourrespective steel ropes 715 are shown. The basket includes safety railing to assist with keeping workers safely in the workspace. As such, thesteel ropes 715 may be anchored to the one or more railings or one or more secure and stationary portions of thebasket 910. - These embodiments of the locking
mechanisms 701 include asignal cable 725 disposed inside thesteel ropes 715 such that thesignal cable 725 attaches to alocal controller 920. In this manner, the local controls may be locked out until one or more of the locking mechanisms indicate a proper latch with an insert device (that is coupled with a worker such as a 5-point safety harness or safety suit (not shown)). In other embodiments, not forming part of the claimed invention, each signal cable joins a largersignal cable run 921 that connects to a remote controller at the other end of theboom arm 930. As such, the remote controller may similarly be locked out of operation until one ormore locking mechanisms 701 indicate correct insertion with a safety device. Theoverall system 900 is further understood with respect to the system block diagram ofFIG. 29 . -
FIG. 29 is a block diagram 950 of the human lift device system ofFIG. 28 according to an embodiment, not forming part of the claimed invention, of the subject matter disclosed herein. The system includes one ormore locking mechanisms local controller 920. In this manner, thelocal controller 920 is configured to send a signal to each locking mechanism. If each indicator switch is closed (indicative of an insert device properly engaged with the locking mechanism), then a return signal is sensed through a series circuit that is completed. Thelocal controller 920 may be configured to be locked out if none of the lockingmechanisms local controller 920 may be locked out is any one of the lockingmechanisms - Further, each
respective locking mechanism remote controller 960. In this manner, theremote controller 960 is also configured to send a signal to each locking mechanism. If each indicator switch is closed (indicative of an insert device properly engaged with the locking mechanism), then a return signal is sensed through a series circuit that is completed. Theremote controller 960 may be configured to be locked out if none of the lockingmechanisms remote controller 960 may be locked out is any one of the lockingmechanisms remote controller 960, the signals may be routed through thelocal controller 920 such that both theremote controller 960 and thelocal controller 920 are enabled or locked out in unison. - It is to be understood that many changes in the particular structure, materials, and features described herein may be made without departing from the scope of the invention, which is solely defined by the appended claims.
Claims (12)
- A locking mechanism (10,100,200,701) comprising:a receiver base (12) having a plurality of locking mechanisms (14) configured to securely engage a device (120,122), at least one of the plurality of locking mechanisms (14) including an indicator configured to indicate that a respective locking mechanism (14) is secured with the device (120,122);a linking member (702) coupled to the receiver base (12), the linking member (702) configured to link the locking mechanism (14) with an anchor point; anda signal cable (725) coupled to the receiver base (12) and configured to communicate a signal corresponding to the indicator characterized in that the signal cable (725) is disposed in the linking member (702).
- The locking mechanism of claim 1, further comprising:a pair of locking tabs (14) configured to pivot about a respective pin (60) operatively coupled to the receiver base (12), each locking tab (14) having a first arm (17) and a second arm (19);wherein each locking tab (14) is spaced apart relative to the receiver base (12).
- The locking mechanism of claim 2, wherein the receiver base (12) further comprises an upper portion and a lower portion, and wherein a cavity (18) configured to receive the device is formed between the two locking tabs (14) and the upper portion of the receiver base.
- The locking mechanism of claim 1, wherein the linking member (702) comprises a steel rope (715).
- The locking mechanism of claim 1, wherein the plurality of locking mechanisms (14) comprises three locking mechanisms, each locking mechanism including a respective electrical switch (104) configured to indicate when the device is secured with the locking mechanism (10), wherein the reed switches (104) are communicatively coupled to the signal cable (725).
- The locking mechanism of claim 1, wherein the plurality of locking mechanisms (14) comprises three locking mechanisms, each locking mechanism including a respective reed switch (104) configured to indicate when the device is secured with the locking mechanism, wherein the reed switches (104) are communicatively coupled to the signal cable (725).
- A human lift system (900), comprising:a workspace (910) having a local controller (920) for maneuvering the workspace;an anchor point disposed in the workspace; anda locking mechanism (701) in accordance with claim 1 and wherein the signal cable (725) is communicatively coupled to the local controller (920).
- The human lift system of claim 7, wherein the workspace (910) further comprises a basket for lifting one or more workers to a work location and the anchor point further comprises a basket railing.
- The human lift system of claim 7, further comprising a plurality of locking mechanisms (701) each having a receiver base coupled to one of a respective plurality of anchor points disposed in the workspace.
- The human lift system of claim 7, wherein the local controller (920) is locked out of operation if the signal communicated to the local controller (920) from the indicator indicates that the locking mechanism is improperly engaged.
- The human lift system of claim 7, further comprising a mobile base having a remote controller (960) for the workspace (910), the remote controller (960) further configured to be locked out of operation if the signal communicated to the local controller (920) from the indicator indicates that the locking mechanism is improperly engaged.
- The human lift system of claim 7, further comprising a human safety harness having an insert (16) configured with a leading edge (46) and an upper portion, the lower portion of the insert configured to be received by the receiver base of the locking mechanism.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/584,882 US10568393B2 (en) | 2015-06-30 | 2017-05-02 | Locking mechanism with multiple stage locking verification |
PCT/US2018/030703 WO2018204522A1 (en) | 2017-05-02 | 2018-05-02 | Locking mechanism with multiple stage locking verification |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3619381A1 EP3619381A1 (en) | 2020-03-11 |
EP3619381A4 EP3619381A4 (en) | 2021-01-27 |
EP3619381B1 true EP3619381B1 (en) | 2022-07-06 |
Family
ID=64016996
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18794292.5A Active EP3619381B1 (en) | 2017-05-02 | 2018-05-02 | Locking mechanism with multiple stage locking verification |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3619381B1 (en) |
CA (1) | CA3059471A1 (en) |
WO (1) | WO2018204522A1 (en) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6823964B2 (en) * | 2001-05-17 | 2004-11-30 | Jlg Industries, Inc. | Fall arrest platform |
US8443937B2 (en) * | 2006-02-21 | 2013-05-21 | Globe Holding Company Llc | Floating harness with continuous loop |
US8016335B2 (en) * | 2007-10-16 | 2011-09-13 | North American Rescue, Llc | Dual handle adjustable drag strap |
US8240012B2 (en) * | 2008-10-24 | 2012-08-14 | Tk Holdings Inc. | Remotely actuated seat belt buckle |
JP5116815B2 (en) * | 2009-10-20 | 2013-01-09 | 藤井電工株式会社 | Safety belt and its usage confirmation system |
FR2984294A1 (en) * | 2011-12-19 | 2013-06-21 | Haulotte Group | DEVICE FOR PROTECTING A USER OF AN ELEVATOR AND SURFACE NACELLE INCLUDING SUCH A DEVICE |
US9089723B2 (en) * | 2012-02-06 | 2015-07-28 | Sapheco, LLC | Safety Protection apparatus for personnel on oil drilling derricks |
US10085520B2 (en) * | 2015-06-30 | 2018-10-02 | Control Dynamics Inc. | Control docking station for a one or two stage locking mechanism |
US10238184B2 (en) * | 2015-06-30 | 2019-03-26 | Control Dynamics Inc. | Locking mechanism with one and two-stage locking verification |
-
2018
- 2018-05-02 WO PCT/US2018/030703 patent/WO2018204522A1/en unknown
- 2018-05-02 CA CA3059471A patent/CA3059471A1/en not_active Abandoned
- 2018-05-02 EP EP18794292.5A patent/EP3619381B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2018204522A1 (en) | 2018-11-08 |
EP3619381A1 (en) | 2020-03-11 |
EP3619381A4 (en) | 2021-01-27 |
CA3059471A1 (en) | 2018-11-08 |
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