The present invention relates generally to industrial safety devices. More particularly, the present invention relates to a lockout system and apparatus for use with industrial equipment and energy sources.
Energy sources in machines and equipment is a hazard to workers. Energy sources include electrical, mechanical, hydraulic, pneumatic, chemical, and thermal energy sources. Workers servicing or maintaining machines or equipment must properly control energy sources to avoid accidents. While servicing and maintaining machines and equipment, for example, an unexpected machine startup or release of stored energy can result in serious injury or death to workers. Injuries resulting from a failure to control hazardous energy during maintenance activities can be fatal and include burns, crush injuries, cuts, lacerations, amputations, and bone fractures.
For example, a steam valve opened automatically can burn workers who are repairing a downstream connection in the piping. A jammed conveyor system can suddenly release and crush a worker attempting to clear the jam. Internal wiring on factory equipment can electrically short, causing electric shock to the worker who is performing a repair.
Industrial workers, electricians, machine operators, and laborers are among the millions of workers who service equipment routinely and face the greatest risk of injury. A worker injured on the job from exposure to hazardous energy will require an average of 24 work days to recuperate from injuries. This recuperation time is costly in the form of lost productivity, medical expenses, lost revenue, other expenses, and as reduced morale after an accident.
To properly control hazardous energy and protect workers from these hazards, lockout/tagout (LOTO) practices and procedures have been established by the Occupational Safety and Health Administration (OSHA). OSHA's regulation is titled Control of Hazardous Energy and is published as 29 C.F.R. § 1910.147. This regulation outlines specific action and procedures for addressing and controlling hazardous energy during service and maintenance of machines and equipment used in general industry. Employers are required to train each worker to ensure that they know, understand, and are able to follow the applicable provisions of the hazardous energy control procedures. Requirements include knowing the purpose and function of the energy control program and having the knowledge and skills to safely apply, use, and remove energy control devices.
All employees who work in an area where energy control procedure is utilized need to be instructed in the purpose of and procedure to control energy, especially the prohibition against attempting to restart or reenergize machines or other equipment that are locked or tagged. All employees who are authorized to lockout machines or equipment and perform the service and maintenance operations need to be trained to recognize hazardous energy sources in the workplace, the type and magnitude of energy found in the workplace, and the appropriate means and methods of isolating and/or controlling the energy.
Proper procedure for controlling energy includes using lockout/tagout devices to shut down equipment and machines for service or repair.
In the open position, hasp parts 12a, 12b rotate about connector 18 in opposite directions so that the hook portions 14 open and the body portions 16 move away from each other. When all locks 30 are removed from the hasp 12, hasp parts 12a, 12b can be moved to the open position so the hasp 12 can be removed from the equipment.
The lockout/tagout kits 10 currently available generally function as intended to prevent turning on a machine, opening a valve, energizing a line or the like. However, these prior-art kits become unwieldy and inconvenient to use especially when multiple workers have locked a machine. A zip tie is often used to attach a name tag to a padlock that is secured to the hasp. When many workers install locks and tags on a hasp to lock out a piece of equipment, the access to the hasp is restricted and the general appearance of the lockout/tagout equipment is confusing and disorganized. The jumble of locks and tags is inconvenient to use, sometimes deterring workers from complying with lockout procedures. Also, it can be difficult to identify all of the workers who have locks on the hasp due to the disorganization of the locks and tags.
Also, workers find it uncomfortable and inconvenient to carry a tag and lock with them while on the job. This inconvenience further discourages workers from following proper lockout/tagout procedure. Since compliance with procedure is essential for workplace safety, the current lockout/tagout equipment leaves room for improvement. Further, no system exists that allows a supervisor to remotely determine which pieces of equipment are locked and by whom. Therefore, what is needed is a lockout system and apparatus that is more convenient and efficient to use by workers.
Further, no lockout devices of the prior art provide wireless communication between the hasp assembly and a remote database or computer. Thus, a need exists for improved lockout systems.
It is an objective of the present invention to facilitate compliance with lockout/tagout procedure, therefore improving worker safety and reducing workplace accidents from stored energy sources. The present invention achieves these and other objectives by providing a lockout system and apparatus that includes a hasp assembly and a plurality of tags, where the hasp assembly can be retained in a locked position when one or more tags are received in the hasp assembly.
In one embodiment, each tag has an elongated shape with a first end and a second end. Each tag defines a tag opening. The hasp assembly includes a back plate defining a plurality of slots each sized and shaped to receive one of the plurality of tags and defining a plurality of back plate openings that align with the tag opening of each tag one or more tags are received in respective slots. A first hasp portion extends from an end of the back plate and defines a first portion of a closed loop. A longitudinal locking bar is slidable along the back plate and defines notches each sized and shaped to receive the first end of a tag. A second hasp portion is attached to the back plate and defines a second portion of the closed loop. Sliding the locking bar between an unlocked position and a locked position operates the second hasp portion between an open position and a closed position, respectively. In the closed position, the second hasp portion and the first hasp portion complete and define the closed loop. Tags may be made of metal, ABS plastic, or any other suitable material.
When the locking bar is in the closed position, one or more of the tags can be installed in respective slot or with the first end of the tag engaging a respective notch on the locking bar. When tags are received in the slots and engage the locking bar, the tag opening of each tag received in the slot is aligned with a respective back plate opening. As such, the tag openings and back plate openings align for securing the tag and hasp assembly together using a padlock or the like, thereby fixing the system in the closed position.
In one embodiment, the hasp assembly includes a front plate secured to the back plate and covering all or part of the slots. Entrance openings between the front plate and back plate receive tags into the slots. Thus, tags are slidingly inserted through the entrance openings between the front plate and the back plate. In one embodiment, the front plate defines and frames a central open area. When the hasp assembly includes the front plate, the front plate is useful to retain the tags in the slots.
In another aspect of the present invention, a lockout system includes a plurality of tags each comprising an elongated plate with a first end and a second end, where tag defines a tag opening. A hasp assembly has a hasp body defining a plurality of slots, where each slot is sized and shaped to slidingly receive one of the plurality of tags and defines a lock opening positioned to align with the tag opening of a respective tag received or installed in the slot. A first hasp portion defines a first closed loop portion and extends from an end portion of the hasp body. A locking bar is slidable along the hasp body between an unlocked position and a locked position. The locking bar defines a plurality of notches each sized and shaped to matingly receive the first end of one of a tag, where the notches align with the slots when the locking bar is in the locked position and the slots are offset from the notches when the locking bar is in the unlocked position. A second hasp portion is movably attached to the hasp body and defines a second closed loop portion. The second hasp portion moves between an open position in which the locking bar is the unlocked position, and a closed position in which the locking bar is in the locked position. The second hasp portion and the first hasp portion complete and define the closed loop when the second hasp portion is in the closed position. Installing one or more tags in slots of the hasp assembly prevents the second hasp portion from moving to the open position.
In another embodiment, the hasp assembly includes a back plate defining the plurality of slots and a front plate aligned with and secured to the back plate to define entrance openings between the back plate and the front plate for each slot.
In another embodiment, the hasp assembly includes a tumbler assembly in the hasp body. The tumbler assembly may be used to set a date. In one embodiment, the tumblers are locked in position when the hasp is in the closed position.
In another embodiment, the hasp assembly includes an electronic display on the hasp body, where the electronic display is configured to recognize the presence of one or more tags installed in the hasp assembly. In one embodiment, each slots has electrical slot contacts that are coupled to the electronic display. Each tag has electrical tag contacts, where any tags installed in the hasp body results in a completed circuit with the electronic display's processor. In another embodiment, each tag has a transmitter circuit and the electronic display has a transceiver circuit. Each tag communicates wirelessly with the transceiver circuit when the tag is installed in the hasp assembly.
In another embodiment, the system includes a database disposed in communication with the hasp assembly and one or more computers are disposed in communication with the database. The hasp assembly communicates lockout information to the database and each computer is configured to display the lockout information to a user. In one embodiment, for example, the lockout information includes data selected from a lockout status, a tag identifier, a lockout date, a tag removal date, a worker identifier, a work code, and a slot identifier.
In another aspect of the present invention, a lockout system includes one or more hasp assembly, a plurality of ID tags, and one or more computer. Each hasp assembly includes a hasp body defining a plurality of tag slots each having a lock opening, a hasp connected to and extending from the hasp body and operable between an open hasp position and a closed hasp position, and a locking bar movable along the hasp body portion between a locking position and an unlocking position. Moving the locking bar to the locking position moves hasp to the closed hasp position and moving the locking bar to the unlocking position moves the hasp to the open hasp position. The hasp assembly also has an electronic display on the hasp body, where the electronic display has a processor and a transceiver circuit. Each ID tag has a first end portion and a second end portion that defines a tag opening. Each ID tag is configured to be removably installed in any of the plurality of tag slots with the first end portion engaging the locking bar and the tag opening aligned with a corresponding lock opening. When an ID tag is installed in the hasp body, the locking bar is prevented from moving to the unlocking position, thereby preventing the hasp from changing to the open hasp position. When an ID tag is installed in the hasp body each of the plurality of ID tags communicates a tag identifier to the electronic display. Each computing device is disposed in wireless communication with the transceiver circuit and is configured to communicate wirelessly with the transceiver circuit and display to a user the data transmitted by the transceiver circuit.
In another embodiment, the lockout system includes a padlock with a padlock hasp sized to extend through the lock opening and corresponding tag opening of one of the plurality of ID tags installed in the hasp body.
In another embodiment, the lockout system includes a transmitter circuit disposed on each of the plurality of ID tags, where the transmitter circuit is configured to communicate wirelessly with the transceiver circuit when the ID tag is installed in the tag slot of the hasp assembly.
In another embodiment, the lockout system includes electrical slot contacts in each of the plurality of tag slots and each ID tag has electrical tag contacts, where the electrical slot contacts and the electrical tag contacts are configured to align and engage when an ID tag is installed in one of the plurality of tag slots.
Another aspect of the present invention is directed to a method of locking an energy source comprising the steps of providing a hasp assembly defining a plurality of tag slots each defining a lock opening, where the hasp assembly has an openable hasp and a locking bar operable with the openable hasp by moving between a locked position and an unlocked position, the locking bar defining a plurality of notches configured to align with respective ones of the plurality of tag slots when the locking bar is in the locked position; providing a plurality of tags each defining a tag opening and configured to be removably installed in one of the tag slots with a first end portion of the tag sized to be received in one of the notches and the tag opening aligned over a lock opening; moving the locking bar to the unlocked position, thereby opening the openable hasp; installing the hasp through a lock opening on an energy source to be locked; moving the locking bar to the locked position, thereby closing the openable hasp and aligning the notches in the locking bar with the tag slots; installing one or more tags into the hasp assembly with each first end portion received in one of the notches and the tag opening aligned over a corresponding lock opening; providing one or more padlocks each having a padlock hasp sized to extend through the tag opening of a tag and through the corresponding lock opening of a tag slot; and locking one padlock with the padlock hasp extending through the tag opening and the corresponding lock opening, thereby preventing the one of the plurality of tags tag from being removed from the corresponding tag slot, preventing the locking bar from moving to the unlocked position, and locking the hasp in the closed position.
In another embodiment, the method also includes the steps of providing a computer with a display device and configured for wireless communication; selecting the hasp assembly to include a transceiver circuit disposed in communication with the computer and configured to detect the presence of one or more tags installed in the hasp assembly; selecting the tags configured to communicate a unique tag ID to the transceiver circuit when installed in the hasp assembly; the transceiver circuit receiving data from one or more tags installed in the hasp assembly; the transceiver circuit transmitting data to the computer in response to receiving data from one or more tags; the computer receiving data transmitted by the transceiver circuit; and the display device displaying to a user the data transmitted by the transceiver circuit.
In another embodiment of the method, data transmitted by the transceiver circuit includes one or more item selected from a unique tag ID, an energy source identifier, a worker identifier, a lockout date, a tag installation date, a tag removal date, and a lockout status identifier.
Exemplary embodiments of the present invention are illustrated in the following figures.
One embodiment of lockout system 100 has a left side of hasp assembly body 102 and right side of hasp assembly body 103. The lockout system 100 includes a back plate 106 and a front plate 108 attached to the back plate 106. A locking bar 110 is slidable between back plate 106 and front plate 108. A completed hasp 112 is attached to the assembly body and includes a first hasp jaw 114 and a second hasp jaw 116 operable between an open position and a closed position in response to movement of the locking bar 110 from an unlocked position to a locked position, respectively.
As discussed in more detail below, locking bar 110 in one embodiment slides along body portions 102, 103 in engagement with second hasp jaw 116, thereby causing second hasp jaw 116 to pivot or move relative to first hasp jaw 114 to open or close hasp 112. Lockout system 100 of
In some embodiments, the hasp assembly 100 optionally includes an adjustable tumbler assembly 120 useful to communicate a lockout date or other information to the user. Tumbler assembly 120 is discussed in more detail below with reference to
Each body portion 102, 103 defines a plurality of channels or tag slots 118, each of which is sized and shaped to slidingly receive one tag 104. As shown in
In some embodiments, tag slots 118 may be formed with an overhang, rail, or other feature that engages each tag 104 and requires installation and removal of tags 104 only by sliding tags 104 along tag slots 118 towards or away from locking bar 110. In such an embodiment, front plate 108 may be optional since it is not needed to retain tags 104 in tag slots 118. Similarly, back plate 106 may be formed with features that engage locking bar 110 to permit it to slide along back plate 106 towards or away from hasp 112, yet without being removed from back plate 106.
When tags 104 are installed fully into tag slot 118 and into recess 122 of locking bar 110, each tag opening 105 aligns with lock opening 124 in back plate 106. Each lock opening 124 may also extend through front plate 108 depending on the location of lock opening 124 and geometry of front plate 108, if present. Each slot 106 intersects a path of locking bar 110, which slides along back plate 106 to operate hasp 112 between an open position and a closed position.
In the closed position shown in
Referring now to
In one embodiment, locking bar 110 is spring-biased towards the locked position. Therefore, when second hasp jaw 116 is moved to the closed position, the spring force moves locking bar 110 to the closed position with recesses 122 aligned with tag slots 118 in back plate 106. In other embodiments, locking bar 110 is spring-biased towards the unlocked position.
Referring now to
To receive locking bar 110, back plate 106 also defines a locking bar slot 119 extending transversely (e.g., perpendicularly) to tag slots 118. In one embodiment, locking bar slot 119 extends along back plate centerline 106c and is perpendicular to tag slots 118. In one embodiment, locking bar slot 119 and tag slots 118 are co-planar on back plate, but this is not required. For example, locking bar slot 119 and tag slots 118 may be formed to different depths in front face 106a to accommodate tags 104 and locking bar 110 between back plate 106 and front plate 108 of when tags 104 and locking bar 110 have different thicknesses.
First hasp jaw 114 is secured to or formed with upper end portion 106d of back plate 106 with first hasp jaw 114 extending away from upper end portion 106d to define a portion of a closed loop. A pivoting connection 168 is made when a mounting hole 124 through upper end portion 106d of back plate 106 is used to rotatably secure second hasp jaw 116, such as by a screw, rivet, or other fastener 116b configured to allow second hasp jaw 116 to rotate about mounting hole 124. Second hasp jaw 116 is mounted to back plate 106 to overlap or otherwise align with first hasp jaw 114 to complete and define a closed loop when second hasp jaw 116 is in in the closed position.
Lower end portion 106e of back plate 106 defines a lower recessed area 128 that receives lower end 110c of locking bar 110. In one embodiment, lower recessed area includes one or more springs 126 or other biasing device 126 positioned between lower end portion 110c of locking bar 110 and bottom end 106f of back plate 106 to bias locking bar 110 towards the locked position. For example, lower recessed area 128 defines one or more spring recesses 129 that partially receive springs 126.
In some embodiments, lower end portion 110b of locking bar 110 defines a frame 131 around tumbler opening 130 and includes a tumbler locking edge 132. In one embodiment, tumbler locking edge 132 of frame 131 faces towards upper end 110a and is sized to fit into and engage slots 170 in tumblers 154 (discussed below) when locking bar 110 is moved to the locked position. Thus, when locking bar 110 is in the unlocked position, the user may manipulate tumblers 154 to a desired position. When locking bar 110 is moved to the locked position, tumbler locking edge 132 engages tumbler slots 170 to lock the tumblers 154 in the position set by the user. Optionally, lower end 110c of locking bar 110 defines one or more locking bar spring recesses 134 to receive spring(s) 126, which may also be received partially by spring recesses 129 in back plate 106.
In other embodiments, frame 131 is a separate component from locking bar 110, where locking bar 110 engages frame 131 and pushes it towards bottom end 106f when locking bar 110 is moved to the unlocked position. When tumbler locking edge 132 does not engage slots 170, tumblers 154 are permitted to rotate and therefore can be set as desired by a user.
In some embodiments, tag 104 defines a ledge, groove, shelf or other feature (not shown) along one or both of sides 104c, 104d to engage a corresponding mating feature of slot 118. For example, when slot 118 includes overhangs, tag 104 has a shelf or protrusion along sides 104c, 104d that fits below and slides within the space between the overhang and back plate 106 to maintain tag 104 in slot 118. Similarly, tag 104 and slot 118 may engage each other using a tongue and groove or other mating structure on the respective parts.
In one embodiment, front plate 108 defines and frames an open region 140 that allows the user to see the position of locking bar 110 and names or other identification on tags 104. Optionally, open region 140 includes a transparent pane 142 of plastic, glass, or other material that restricts access to locking bar 110 and tags 104 yet allows their position or identification to be visible to the user. In embodiments where system 100 includes tumblers 154, front plate 108 defines a tumbler opening 144 sized and located to enable the user to manipulate and view the tumblers 154. Front plate 108 may be secured to back plate 106 using fasteners, welding, clips, or other means.
Turning now to
Axle 152 has a cylindrical axle body 152c with optional flats 152a, 152b, machined into each axle end portion 152d, 152e, respectively. Axle end portions 152d, 152e are received in first and second axle recesses 160, 162, respectively, with flats 152a, 152b flush with or slightly below the surface of lower recessed area 128. Flats 152a, 152b prevent axle 152 from rotating with tumblers 154. Alternately, axle recesses 160, 162 can be machined to a depth that eliminates the need for flats 152a, 152b.
Vertically above and immediately adjacent back plate tumbler opening 164 is a resistance pad recess 166. Resistance pad recess 166 is sized and shaped to receive resistance pad 156 with front face 156a substantially flush with lower recessed area 128 and with a narrowed edge 156c of resistance pad 156 extending beyond resistance pad recess 166 to extend into and engage slots 170 of tumblers 154 as shown in
In another embodiment, resistance pad 156 is replaced with a spring-biased bar with rounded ball pins. The ball pins are biased to engage the tumblers and encourage the tumblers to occupy positions where slots 170 align with the ball pins.
Tumblers 154 are generally cylindrical and have a central opening 154a sized to receive axle 152 therethrough. Each tumbler 154 has a plurality of tumbler faces 154b evenly spaced circumferentially around tumbler 154 and separated by slots 170. In one embodiment, slots 170 are angled consistently with sloped surface 156d to accentuate ease of rotation in direction 172 and resistance to rotation opposite of direction 172.
Tumbler cover 158 attaches to front plate 108 when assembled as shown, for example, in
Referring now to
In one embodiment, for example, the electronic display 180 is converted from an unlocked display condition to a locked display condition when the locking bar 110 is moved from the unlocked position to the locked position, respectively. In doing so, the locking bar 110 engages or disengages a switch, electrical contact, button, or the like on the electronic display 180 to cause the electronic display 180 to change condition. When the locking bar 110 is in the unlocked position, for example, a protrusion 182 on locking bar 110 disengages from a contact 184 or the like on electronic display 180, thereby changing electronic display 180 to the unlocked display condition. When unlocked, a user may input a date or other information relevant to the use of the lockout system 100. When locking bar 110 is moved to the locked position, protrusion 182 engages contact 184 and electronic display 180 is changed to the locked display condition and a user may not input new data or change entered data.
When one or more tags 104 are installed in hasp assembly 100, the processor 190 of electronic display 180 receives and records the identifier associated with each tag 104 and the date each tag 104 was installed. Other information may optionally be stored, such as the slot number on the hasp assembly 100, a code identifying work to be performed, a tag removal date, an identifier for the work to be performed, and other similar information. Optionally, when locking bar 110 is moved to the unlocked position, the data received from each tag 104 installed in the hasp assembly 100 are stored in a history file that includes information such as the identifier associated with each tag 104 installed in the hasp assembly 100, the date each tag 104 is installed in hasp assembly 100, and the date removed from hasp assembly 100. In some embodiments, electronic display 180 is programmable to collect and store information as desired or suitable. As such, electronic display 180 may include a keypad 185 or other data entry mechanism.
Referring now to
In one embodiment, for example, contacts 186 on the tag 104 engage contacts 188 in a tag slot 118 on the hasp assembly 100 when tag 104 is installed in hasp assembly 100. Each tag 104 may be coded with a worker identifier, contact information, and other relevant information. When each tag 104 is installed in a tag slot 118, a circuit is completed and the processor 190 receives the data associated with each tag 104. For example, processor 190 receives and displays the worker's identity and a date the tag 104 was installed in the hasp assembly 100. Optionally, the processor 190 includes a transceiver 200 for communicating wirelessly with a computer 240 and database 245 (shown in
Bluetooth Connective Systems
Referring now to
In one embodiment, each tag 104 is equipped with a transmitter 204 and hasp assembly 100 is equipped with a transceiver 200, where the transmitter 204 is configured to respond to a radio frequency signal transmitted by transceiver 200, such as a data request. In some embodiments, transmitters 204 are passive: each transmitter 204 powers up and sends a reply signal after receiving a query from the transceiver 200. The reply signal from tag 104 contains a tag identifier or other data that is received by the transceiver 200. In other embodiments, transmitters 204 are active and periodically transmit a signal containing the tag identifier. Regardless of whether tag 104 communicates with hasp assembly 100 using wireless or wired means, when a tag 104 is installed in the hasp assembly 100, transmitter 204 of the tag 104 communicates with transceiver 200 in the hasp assembly 100. In doing so, the hasp assembly 100 recognizes the presence of one or more tags 104 installed in tag slots 118 of the hasp assembly 100. Hasp assembly 100 may record and display the information on the hasp assembly 100 only, or may communicate the information to database 245.
In some embodiments, transceiver 200 is configured to communicate wirelessly with database 245 and/or one or more computers 240, such as via a wireless network of the Internet. Each computer 240 may be a general-purpose desktop computer, a tablet computer, a smart phone, a data logger, or other electronic device configured to display status indicators of lockout system 100. In one embodiment, transceiver 200 communicates with computers 240 using a local area network with a wireless internet router 250.
In some embodiments, transmitter 204 and transceiver 200 are configured to communicate using an electromagnetic field with a frequency of 120 KHz to 140 KHz. Frequencies of 125 KHz, for example, have been found to be better suited due to reduced interference from metal objects. In other embodiments, the electromagnetic field has a frequency of 13.56 MHz, 900 MHz, 2.4 GHz, 5 GHz, or other frequency suitable for the range, antenna size, and environment where lockout system 100 will be used. In some embodiments, communication between tag 104 and transceiver 200 uses a first frequency of 120 KHz to 140 KHz while communication between transceiver 200 and computer 240 uses a second frequency that is different from the first frequency, such as 2.4 GHz.
In one embodiment, each computer 240 and each hasp assembly 100 wirelessly communicate with database 245. The database 245 may be maintained in one or more computer 240 or at some other location accessible by each computer 240 in system 100, such as “the cloud” or a remote location. In one embodiment, database 245 acts as the master data storage location for all hasp assemblies 102 in lockout system 100. Database 245 is preferably updated in real time when a change occurs at any of the hasp assemblies 102 and stores information for each hasp assembly 100. Periodic updates are also acceptable, either by a data push from hasp assemblies 102 or a data pull from database 245. A condition change at any hasp assembly 100 includes a change in tags 104 installed in hasp assembly 100, a change between locked and unlocked status of the hasp assembly 100, change of a date for end-of-work, and the like. Using the database 245 that is distinct from hasp assemblies 102 reduces the computing requirements and power requirements for each hasp assembly 100.
By viewing the data on a computer 240, such as tablet computers 240a carried by management and supervisors or desktop computers 240b in an office, the management is informed of the current lockout status of each energy source without having to visit each worksites throughout the facility. As noted above, for example, each computer 240, database 245, and each hasp assembly 100 communicate using a wireless internet router 250. Data 104f communicated from the hasp assembly 100 may include a unique tag ID, an energy source identifier, a worker identifier, a lockout date, a tag installation date, a tag removal date, and/or a lockout status identifier. For example, for each energy source identified as locked-out, computer(s) 240 display the identity of the worker(s) who have locked out the energy source, the dates each tag 104 was installed in the hasp assembly 100, and other information 104f as deemed appropriate. Further, by communication between each hasp assembly 100, database 245, and computer(s) 240, management and workers may be able to determine the location of each hasp assembly 100, whether in use or not, thereby preventing loss of hasp assemblies.
Lockout system 100 with embodiments of hasp assemblies 102 and tags 104 discussed herein is used to lockout one or more piece of equipment or energy source. After placing hasp 112 in the open position, hasp 112 is attached through an opening on a switch, valve, control panel, or other control tied to the energy source. After closing the hasp 112 and moving the locking bar 110 to the locked position, each user performing work on the energy source may independently install his/her tag 104 into an open slot 118 of hasp assembly 100. The user then locks the tag 104 into the hasp assembly 100 with a padlock 109 or other secure device placed through tag opening 105 and lock opening 124.
Depending on the embodiments of hasp assemblies 102 and tags 104, lockout system 100 may be used to facilitate compliance with lockout/tagout protocol and manage locked energy sources at a facility.
Alternative Lock Out Devices
Further embodiments of the present invention will now be discussed with reference to
Referring to at least
As before, slots 118 along the back-plate portion 106 correspond with recesses 122 of the locking bar portion 110 which correspond to a shape of the tag 104. Each channel slot 118 on the hasp body 102, 103 meets an additional corresponding hole 124 that is in a fixed position to align with the hole 105 on the ID tab 104. The slots 118 extend horizontally, while each of the corresponding holes 124 extend laterally. Two tabs 104 can then be inserted in horizontally adjacent slots 118 by slightly offsetting their inward facing positions laterally such that each of the two adjacent tabs 104 has a single channel 105 interlocking with adjacent dual front and rear channels 124. The axis of the rotating point 168 extends laterally and parallel to the padlock holes 124, 105 to prevent rotation of the body 102, 103 while the padlock is locked.
Increased Tag Support Per Device
One of the shared features for several of the models in
The models in
Restated in ratio form then, the embodiments in
The tags 104 often have tag identifiers in the form of the electronic display 180 (see, e.g.,
Alternative Pivoting Connections
As with other embodiments, the pivoting connection 168 rotatably secures a first hasp jaw 114 to a second hasp jaw 116. In these embodiments though, a first hasp jaw 114 is integral with the first hasp body half 103 and the second hasp jaw 116 is integral with the second hasp body half 102, so that the first hasp body half 103 rotates with respect to the second hasp body half 102.
The alternative pivoting connections in these embodiments address potential issues with earlier embodiments. Specifically, one weakness of other models is the tensile strength of the hasp jaw and the singular point of connection with the hasp jaw to the main body of the of lockout system. By integrating the main body portions with first and second hasp portions, the overall strength of the lockout system is improved. Further an advantageous feature of these embodiments, by integrating a first hasp jaw with a first hasp body portion which comprises slots for tags; and a second hasp jaw with a second hasp portion which comprises slots for tags, a single defective pivoting connection will not prove sufficient to enable access to the energy source being protected against interference.
For example, in
The placement of the pivoting connection 168 in these embodiments may vary. In
In some embodiments, the PCB assembly is housed entirely inside the connecting radii of the two halves. The first hasp body half 103 is dimensioned with a first cavity to internally house a PCB assembly 181 having electronics, such as the electronic display 180, processor 190, transceiver 200, transmitter 204, and circuit board. Four posts along the back side have notches which go through the four associated mounting holes 135 at each corner of the circuit board 210 and snap the PCB assembly 181 in place. Alternatively, these posts could be hollow and accept mating screws for securing the PCB assembly 181 in reversible manner.
The first body half 103 is also dimensioned with a window to view the electronic display 180 on the exterior front half 106a of the hasp 103. A second cavity is centered underneath the display 180 and dimensioned to accept the control button 185 of the PCB assembly 181 that controls the output of the display 180.
General directional terms employed throughout the description of the figures include the terms: horizontal, vertical, and lateral. Horizontal generally having the meaning of being in a position or direction at right angles to the vertical and lateral directions; generally parallel to ground level; also associated with movement or direction along the x-axis. Vertical generally having the meaning of being in a position or direction perpendicular to the plane of the horizon; generally at right angles to the horizontal and lateral directions; also associated with movement or direction along the y-axis. Lateral generally having the meaning of being in a position or direction at right angles to the vertical and horizontal directions; generally parallel to ground level; also associated with movement or direction along the z-axis.
Although the preferred embodiments of the present invention have been described herein, the above description is merely illustrative. Further modification of the invention herein disclosed will occur to those skilled in the respective arts and all such modifications are deemed to be within the scope of the invention as defined by the appended claims.
Provided below is a listing of the elements of the present invention and their associated reference numbers which have been adhered to within the present specification and the associated drawings.
This application is a continuation-in-part of nonprovisional application Ser. No. 15/785,582, filed on Oct. 17, 2017, which issued on Feb. 25, 2020, as U.S. patent application Ser. No. 10,570,644, which is a continuation of nonprovisional application Ser. No. 15/435,365, filed on Feb. 17, 2017, which issued on Jan. 30, 2018, as U.S. Pat. No. 9,881,749, which claims priority to provisional application No. 62/296,910, filed on Feb. 18, 2016.
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