US20190009325A1 - Emergency stop configuration for ironworker - Google Patents
Emergency stop configuration for ironworker Download PDFInfo
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- US20190009325A1 US20190009325A1 US16/129,991 US201816129991A US2019009325A1 US 20190009325 A1 US20190009325 A1 US 20190009325A1 US 201816129991 A US201816129991 A US 201816129991A US 2019009325 A1 US2019009325 A1 US 2019009325A1
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- Prior art keywords
- hydraulic
- ironworker
- power
- emergency stop
- stop button
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 230000000712 assembly Effects 0.000 claims abstract 2
- 238000000429 assembly Methods 0.000 claims abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 230000000994 depressogenic effect Effects 0.000 claims description 4
- 235000001674 Agaricus brunnescens Nutrition 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003462 Bender reaction Methods 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000001755 vocal effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D55/00—Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0078—Safety devices protecting the operator, e.g. against accident or noise
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0078—Safety devices protecting the operator, e.g. against accident or noise
- B23Q11/0092—Safety devices protecting the operator, e.g. against accident or noise actuating braking or stopping means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
Definitions
- Hydraulic ironworkers are a class of machines that can shear, notch, and punch holes in steel plate and bars. Ironworkers generate force using mechanical advantage or hydraulic systems. Modern systems use hydraulic rams powered by a heavy alternating current electric motor. High strength carbon steel blades and dies of various shapes are used to work the metal. The machine itself is made of very heavy steel to handle die enormous force that can be generated during use. Ironworkers are rated according to the force they can generate in tons. Although ironworkers are tools, just like hammers and wrenches, they also provide many more safety hazards due to the enormous power and force that they generate. For these and other reasons, there is a need for the present invention.
- FIG. 1 illustrates one embodiment of a hydraulic ironworker.
- FIG. 2 illustrates an ironworker system including a hydraulic ironworker coupled to an accessory tool in accordance with one embodiment.
- FIG. 3 illustrates a partial view of an accessory tool, including a remote unit, coupled to a hydraulic ironworker in accordance with one embodiment.
- FIG. 4 is an electrical schematic illustration of a hydraulic ironworker coupled to an accessory tool in accordance with one embodiment.
- FIG. 1 illustrates hydraulic ironworker 10 in accordance with one embodiment.
- ironworker 10 is a 55 ton ironworker, such as that manufactured by Edwards Manufacturing Company of Albert Lea, Minn.
- Ironworker 10 can be any of a variety of hydraulic ironworkers that are rated, for example, anywhere from 20 tons to as high as 150 tons.
- Ironworker 10 can be used for punching, shearing, notching, bending and other metal fabrication functions.
- Ironworker 10 uses hydraulic power to deliver controlled force to various work pieces.
- Ironworker 10 can be used in manufacturing or fabrication shops, maintenance departments, and vocational school to save time, increase productivity, eliminate waste and create clean smooth cuts and holes.
- hydraulic ironworker 10 includes punch station 12 , flat bar shear station 14 , angle shear station 16 , coper notcher station 18 , control panel 20 and foot pedal 22 .
- Control panel 20 includes start switch 24 , disconnect switch 26 , emergency stop button 28 , and select switch 30 .
- Foot pedal 22 is also coupled to control panel 20 .
- various metal fabrication functions are performed at each of punch station 12 , flat bar shear station 14 , angle shear station 16 , and coper notcher station 18 .
- the motor of ironworker 10 is engaged with the toggling of start switch 24 .
- a work piece is then introduced into one of the stations 12 / 14 / 16 / 18 and then foot pedal 22 is actuated to engage the hydraulics to force blades and/or dies of hydraulic ironworker 10 to complete the action of punching, shearing, notching, bending or similar actions on the workpiece.
- Select switch 30 can be toggled between three modes of operation: an iron worker mode, an accessory mode and an auto cut mode.
- select switch 30 When select switch 30 is in the iron worker mode, engaging the hydraulics to force the blades or dies is accomplished by stepping down on foot pedal 22 . Once the user steps off foot pedal 22 , the unit is disengaged after the cylinder retracts.
- the auto cut mode can be selected such that the hydraulics are continuously enabled and will engage each time a sensor within flat bar shear station 14 senses that a work piece is in proper position and will “auto cut” each time the piece is sensed. In this auto cut mode, foot pedal 22 is disengaged.
- the accessory mode enables an accessory that can optionally be attached to ironworker 10 , as will be discussed in more detail below.
- emergency stop button 28 is provided on control panel 20 . If something or someone is engaged in a dangerous way with ironworker 10 , pushing emergency stop button 28 cuts off all power to ironworker 10 . Accordingly, once emergency stop 28 is pushed, the motor and hydraulics are disabled and there is no way for any additional force to be output by the machine.
- emergency stop button 28 is a twist lock mushroom head that opens a circuit when depressed.
- Disconnect switch 26 on control panel 20 is provided for further safety in the operation and maintenance of ironworker 10 .
- a front door panel In order to access the inside of ironworker 10 , a front door panel must be opened. The door will not open, however, unless disconnect switch 26 is in the off position. Once in the off position, all incoming power to the components inside the enclosure is completely cut off.
- Disconnect switch 26 also has a lock out position that allows electricians or mechanics to lock into the off position h the door closed and prevent the machine from being started during maintenance or if the machine is not working properly.
- FIG. 2 illustrates ironworker system 40 in accordance with one embodiment.
- Ironworker system 40 includes ironworker 10 coupled to accessory tool 50 .
- Accessory tool 50 can be any one of several available options that can attached to ironworker 10 , such as pipe benders, shop presses, radius rollers, horizontal presses, brake presses, plate shears, plate rollers, slip rollers, welding positioners, power hammers, power shrinker/stretchers, planishing hammers, power bead rollers, automotive lifts and a variety of others.
- ironworker 10 is coupled to accessory tool 50 via accessory harness 52 .
- Accessory harness 52 includes first and second hydraulic hoses 54 and 56 and includes electrical cable 58 . Once coupled to ironworker 10 , first and second hydraulic hoses 54 and 56 deliver the hydraulic power of ironworker 10 to accessory tool 50 , such that accessory tool 50 uses the power of ironworker 10 .
- accessory tool 50 does not require its own internal power system, effectively using ironworker 10 as the power plant, and accordingly, ironworker system 40 is a very cost-effective system.
- Accessory tool 50 can be specifically tailored to any of a variety of applications.
- ironworker system 40 also includes remote push button unit 60 .
- Remote push button unit 60 includes controls for engaging and releasing accessory tool 50 , and includes a means of cutting off all power for the entire ironworker system 40 , as will be more fully discussed below.
- An operator can use remote push button unit 60 to control the operation of accessory tool 50 without needing to be located proximate to ironworker 10 .
- an operator can use remote push button unit 60 to execute the same functionality as available on the control panel 20 of ironworker 10 , such as the iron worker mode, the accessory mode and the auto cut mode.
- FIG. 3 illustrates further detail of remote push button unit 60 for use with accessory tool 50 in accordance with one embodiment.
- remote push button unit 60 includes remote cable 62 , extend button 64 , retract button 66 , and emergency stop button 68 .
- remote push button unit 60 controls the functionality of ironworker 10 and accessory tool 50 out at remotely located accessory tool 50 . Pressing the extend button 64 will cause power from ironworker 10 to be delivered to accessory tool 50 causing it to extend and pressing retract button 66 will accordingly cause it to retract.
- pressing emergency stop button 68 will not just stop power to accessory tool 50 , but will actually cut off all power to the entire ironworker system 40 , including ironworker 10 . Enabling emergency stop button 68 to cut off power to the entire system 40 provides added safety in cutting off power at the source to ensure complete power loss in the event of an emergency situation.
- Ironworker 10 can be provided by itself, without an accessory tool. When ironworker 10 is configured for use with accessory tool 50 , however, accessory harness 52 is hard-wired into ironworker 10 . As illustrated in FIG. 3 , accessory harness 52 includes first and second hydraulic hoses 54 and 56 , which are coupled to accessory tool 50 to provide hydraulic power thereto. Accessory harness 52 also includes electrical cable 58 , which also includes female connector 58 a out at its end intended for connection to accessory tool 50 . Remote cable 62 of remote push button unit 60 also includes male connector 62 a , which is configured to plug into female connector 58 a in one embodiment. In this way, remote push button unit 60 is electrically coupled back to ironworker 10 in order to control hydraulic power delivery, and potentially other control functions.
- ironworker system 40 further includes safety plug assembly 70 in accordance with one embodiment.
- Safety plug assembly 70 is configured with male connector 70 a , which is configured to plug into female connector 58 a of accessory harness 52 .
- power is cut off from the entire ironworker system 40 until one of either safety plug assembly 70 or remote cable 62 is plugged into accessory harness 52 .
- safety plug assembly 70 is coupled to accessory harness 52
- emergency stop button 28 is functional and its actuation will cut off all power to ironworker system 40 .
- remote cable 62 is coupled to accessory harness 52
- both emergency stop button 28 and emergency stop button 68 are functional and actuation of either will cut off all power to ironworker system 40 .
- This configuration prevents a situation where auxiliary harness 52 is mistakenly left active, but without the ability of an emergency stop function out at the remote control.
- the design also ensures that emergency stop button 28 is never disabled while the system is active, essentially providing redundant emergency stopping locations.
- ironworker system 40 can be delivered to a customer with ironworker 10 and without accessory tool 50 , but including auxiliary harness 52 .
- the customer can attach an accessory tool 50 it already owns or that it later acquires.
- the customer must attach safety plug assembly 70 in order to operate ironworker 10 , otherwise, system power is disabled.
- the customer can swap out safety plug assembly 70 for remote cable 62 , thereby enabling remote push button unit 60 , including emergency stop button 68 .
- FIG. 4 is a simplified electrical schematic illustrating aspects of ironworker system 40 in accordance with one embodiment. Control circuitry and most connections to various load components are eliminated in order to simplify the figure.
- ironworker 10 , accessory harness 52 , safety plug assembly 70 and remote push button unit 60 are illustrated in dotted lines so that some selected portions of the electrical connections within the various components are visible.
- Power supply 80 is located within ironworker 10 . Power supply 80 provides power to the entire ironworker system 40 , including its motor for die hydraulics and all system controls. The motor and other various loads in the system are represented by system load 81 , also illustrated as within iron worker 10 .
- system load 81 is made up of any of various motors, pressure switches, valves, lights and so forth, and they may be located within ironworker 10 , or out on accessory tool 50 , or at another location. For simplification of the figure, however, system load 81 is illustrated within ironworker 10 .
- negative supply line 84 is coupled to the negative terminal of power supply 80 on one side and coupled to a first side of load (L) 81 on its other side.
- the second side of load (L) 81 is then routed from within ironworker 10 through accessory harness 52 out to first port 86 out at the end of accessory harness 52 in one embodiment.
- First port 86 is located at an end of accessory harness 52 that is configured to couple to either safety plug assembly 70 or remote push button unit 60 .
- Positive supply line 82 is coupled to the positive terminal of power supply 80 on one side and coupled to a first side of emergency stop button 28 on its other side.
- the second side of emergency stop button 28 is coupled to second port 88 of accessory harness 52 . Accordingly, pressing emergency stop button 28 breaks or electrically interrupts positive supply line 82 .
- Second port 88 is located adjacent first port at the end of accessory harness 52 that is configured to couple to either safety plug assembly 70 or remote push button unit 60 .
- safety plug assembly 70 and remote push button unit 60 are each configured with first and second ports 86 and 88 .
- first and second ports 86 and 88 of safety plug assembly 70 or first and second ports 86 and 88 of remote push button unit 60 are coupled to first and second ports 86 and 88 of accessory harness 52 .
- coupling safety plug assembly 70 to accessory harness 52 closes the circuit between positive and negative supply lines 82 and 84 , thereby allowing power supply 80 to drive system load 81 .
- remote push button unit 60 couples to accessory harness 52 , also closes the circuit between positive and negative supply lines 82 and 84 , as long as emergency stop button 68 has not been depressed, thereby allowing power supply 80 to drive system load 81 .
- Circuitry within the simplified version of remote push button unit 60 of FIG. 4 that couples to extend and retract buttons 64 and 66 is eliminated in the figure for simplification.
- FIG. 4 also illustrates that emergency stop buttons 28 and 68 will always function to cut off all power to ironworker system 40 .
- remote push button unit 60 When remote push button unit 60 is coupled to accessory harness 52 , actuation of either of emergency stop buttons 28 or 68 will create an open circuit in positive supply line 82 disabling the system. Because emergency stop buttons 28 or 68 are in series with each other relative to power supply 80 , pressing either one will create an open circuit condition.
- safety plug assembly 70 is coupled to accessory harness 52 actuation of first emergency stop button 28 will create an open circuit in positive supply line 82 disabling the system. Because remote push button unit 60 is not connected in that condition, there is no possibility of operator confusion with respect to using emergency stop button 68 . Requiring connection of safety plug assembly 70 in order to allow the system to operate provides further safety in require purposeful action by the operator even when accessory tool 50 is not intended to be used.
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Abstract
Description
- This patent application claims priority under 35 U.S.C. § 119(e) to U.S. patent application Ser. No. 15/066,583 entitled “EMERGENCY STOP CONFIGURATION FOR IRONWORKER,” having a filing date of Mar. 10, 2016 which claims priority to U.S. Provisional Patent Application Ser. No. 62/169,841 entitled “EMERGENCY STOP CONFIGURATION FOR IRONWORKER,” having a filing date of Jun. 2, 2015, the contents of which are incorporated herein by reference.
- Hydraulic ironworkers are a class of machines that can shear, notch, and punch holes in steel plate and bars. Ironworkers generate force using mechanical advantage or hydraulic systems. Modern systems use hydraulic rams powered by a heavy alternating current electric motor. High strength carbon steel blades and dies of various shapes are used to work the metal. The machine itself is made of very heavy steel to handle die enormous force that can be generated during use. Ironworkers are rated according to the force they can generate in tons. Although ironworkers are tools, just like hammers and wrenches, they also provide many more safety hazards due to the enormous power and force that they generate. For these and other reasons, there is a need for the present invention.
- The accompanying drawings are included to provide a further understanding of embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and together with the description serve to explain principles of embodiments. Other embodiments and ninny of the intended advantages of embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.
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FIG. 1 illustrates one embodiment of a hydraulic ironworker. -
FIG. 2 illustrates an ironworker system including a hydraulic ironworker coupled to an accessory tool in accordance with one embodiment. -
FIG. 3 illustrates a partial view of an accessory tool, including a remote unit, coupled to a hydraulic ironworker in accordance with one embodiment. -
FIG. 4 is an electrical schematic illustration of a hydraulic ironworker coupled to an accessory tool in accordance with one embodiment. - In the following Detailed Description, reference made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. In this regard, directional terminology, such as “top,” “bottom,” “front,” “back,” “leading,” “trailing,” etc., is used with reference to the orientation of the Figure(s) being described. Because components of embodiments can be positioned in a number of different orientations, the directional terminology is used for purposes of illustration and is in no way limiting. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.
- It is to be understood that the features of the various exemplary embodiments described herein may be combined with each other, unless specifically noted otherwise.
-
FIG. 1 illustrateshydraulic ironworker 10 in accordance with one embodiment. In one example,ironworker 10 is a 55 ton ironworker, such as that manufactured by Edwards Manufacturing Company of Albert Lea, Minn. Ironworker 10 can be any of a variety of hydraulic ironworkers that are rated, for example, anywhere from 20 tons to as high as 150 tons. Ironworker 10 can be used for punching, shearing, notching, bending and other metal fabrication functions. Ironworker 10 uses hydraulic power to deliver controlled force to various work pieces. Ironworker 10 can be used in manufacturing or fabrication shops, maintenance departments, and vocational school to save time, increase productivity, eliminate waste and create clean smooth cuts and holes. - In one embodiment,
hydraulic ironworker 10 includespunch station 12, flatbar shear station 14,angle shear station 16,coper notcher station 18,control panel 20 andfoot pedal 22.Control panel 20 includesstart switch 24,disconnect switch 26,emergency stop button 28, and selectswitch 30.Foot pedal 22 is also coupled tocontrol panel 20. - In operation, various metal fabrication functions are performed at each of
punch station 12, flatbar shear station 14,angle shear station 16, andcoper notcher station 18. The motor ofironworker 10 is engaged with the toggling ofstart switch 24. In one embodiment, a work piece is then introduced into one of thestations 12/14/16/18 and thenfoot pedal 22 is actuated to engage the hydraulics to force blades and/or dies ofhydraulic ironworker 10 to complete the action of punching, shearing, notching, bending or similar actions on the workpiece. - Select
switch 30 can be toggled between three modes of operation: an iron worker mode, an accessory mode and an auto cut mode. Whenselect switch 30 is in the iron worker mode, engaging the hydraulics to force the blades or dies is accomplished by stepping down onfoot pedal 22. Once the user steps offfoot pedal 22, the unit is disengaged after the cylinder retracts. For the shearing function, the auto cut mode can be selected such that the hydraulics are continuously enabled and will engage each time a sensor within flatbar shear station 14 senses that a work piece is in proper position and will “auto cut” each time the piece is sensed. In this auto cut mode,foot pedal 22 is disengaged. Finally, the accessory mode enables an accessory that can optionally be attached toironworker 10, as will be discussed in more detail below. - Because
ironworker 10 generates enormous forces when actuated in any of its modes, it also provides an emergency provision for shutting down completely and quickly. Accordingly,emergency stop button 28 is provided oncontrol panel 20. If something or someone is engaged in a dangerous way withironworker 10, pushingemergency stop button 28 cuts off all power toironworker 10. Accordingly, onceemergency stop 28 is pushed, the motor and hydraulics are disabled and there is no way for any additional force to be output by the machine. In one embodiment,emergency stop button 28 is a twist lock mushroom head that opens a circuit when depressed. - Disconnect
switch 26 oncontrol panel 20 is provided for further safety in the operation and maintenance ofironworker 10. In order to access the inside ofironworker 10, a front door panel must be opened. The door will not open, however, unlessdisconnect switch 26 is in the off position. Once in the off position, all incoming power to the components inside the enclosure is completely cut off. Disconnectswitch 26 also has a lock out position that allows electricians or mechanics to lock into the off position h the door closed and prevent the machine from being started during maintenance or if the machine is not working properly. -
FIG. 2 illustratesironworker system 40 in accordance with one embodiment. Ironworkersystem 40 includesironworker 10 coupled to accessory tool 50. Accessory tool 50 can be any one of several available options that can attached toironworker 10, such as pipe benders, shop presses, radius rollers, horizontal presses, brake presses, plate shears, plate rollers, slip rollers, welding positioners, power hammers, power shrinker/stretchers, planishing hammers, power bead rollers, automotive lifts and a variety of others. - In one embodiment,
ironworker 10 is coupled to accessory tool 50 viaaccessory harness 52.Accessory harness 52 includes first and secondhydraulic hoses electrical cable 58. Once coupled toironworker 10, first and secondhydraulic hoses ironworker 10 to accessory tool 50, such that accessory tool 50 uses the power ofironworker 10. As such, accessory tool 50 does not require its own internal power system, effectively usingironworker 10 as the power plant, and accordingly,ironworker system 40 is a very cost-effective system. Accessory tool 50 can be specifically tailored to any of a variety of applications. - Because accessory tool 50 can be located somewhat remotely from
ironworker 10, by virtue of the length ofaccessory harness 52,ironworker system 40 also includes remotepush button unit 60. Remotepush button unit 60 includes controls for engaging and releasing accessory tool 50, and includes a means of cutting off all power for theentire ironworker system 40, as will be more fully discussed below. An operator can use remotepush button unit 60 to control the operation of accessory tool 50 without needing to be located proximate toironworker 10. In one embodiment, an operator can use remotepush button unit 60 to execute the same functionality as available on thecontrol panel 20 ofironworker 10, such as the iron worker mode, the accessory mode and the auto cut mode. -
FIG. 3 illustrates further detail of remotepush button unit 60 for use with accessory tool 50 in accordance with one embodiment. In one embodiment, remotepush button unit 60 includesremote cable 62, extendbutton 64, retractbutton 66, andemergency stop button 68. In operation, once connected, remotepush button unit 60 controls the functionality ofironworker 10 and accessory tool 50 out at remotely located accessory tool 50. Pressing the extendbutton 64 will cause power fromironworker 10 to be delivered to accessory tool 50 causing it to extend and pressing retractbutton 66 will accordingly cause it to retract. - In one embodiment, pressing
emergency stop button 68 will not just stop power to accessory tool 50, but will actually cut off all power to theentire ironworker system 40, includingironworker 10. Enablingemergency stop button 68 to cut off power to theentire system 40 provides added safety in cutting off power at the source to ensure complete power loss in the event of an emergency situation. -
Ironworker 10 can be provided by itself, without an accessory tool. Whenironworker 10 is configured for use with accessory tool 50, however,accessory harness 52 is hard-wired intoironworker 10. As illustrated inFIG. 3 ,accessory harness 52 includes first and secondhydraulic hoses Accessory harness 52 also includeselectrical cable 58, which also includesfemale connector 58 a out at its end intended for connection to accessory tool 50.Remote cable 62 of remotepush button unit 60 also includesmale connector 62 a, which is configured to plug intofemale connector 58 a in one embodiment. In this way, remotepush button unit 60 is electrically coupled back toironworker 10 in order to control hydraulic power delivery, and potentially other control functions. - Because
ironworker 10 can be used directly without using accessory tool 50, even when it is equipped to be used with accessory tool 50, it is important to ensure that accessory tool 50 is properly assembled even when not in use. Accordingly,ironworker system 40 further includessafety plug assembly 70 in accordance with one embodiment.Safety plug assembly 70 is configured withmale connector 70 a, which is configured to plug intofemale connector 58 a ofaccessory harness 52. - In one embodiment, power is cut off from the
entire ironworker system 40 until one of eithersafety plug assembly 70 orremote cable 62 is plugged intoaccessory harness 52. Whensafety plug assembly 70 is coupled toaccessory harness 52,emergency stop button 28 is functional and its actuation will cut off all power toironworker system 40. Whenremote cable 62 is coupled toaccessory harness 52, bothemergency stop button 28 andemergency stop button 68 are functional and actuation of either will cut off all power toironworker system 40. This configuration prevents a situation whereauxiliary harness 52 is mistakenly left active, but without the ability of an emergency stop function out at the remote control. The design also ensures thatemergency stop button 28 is never disabled while the system is active, essentially providing redundant emergency stopping locations. - In one embodiment,
ironworker system 40 can be delivered to a customer withironworker 10 and without accessory tool 50, but includingauxiliary harness 52. In this way, the customer can attach an accessory tool 50 it already owns or that it later acquires. In such a case, the customer must attachsafety plug assembly 70 in order to operateironworker 10, otherwise, system power is disabled. Once the customer adds accessory tool 50, it can swap outsafety plug assembly 70 forremote cable 62, thereby enabling remotepush button unit 60, includingemergency stop button 68. -
FIG. 4 is a simplified electrical schematic illustrating aspects ofironworker system 40 in accordance with one embodiment. Control circuitry and most connections to various load components are eliminated in order to simplify the figure. InFIG. 4 ,ironworker 10,accessory harness 52,safety plug assembly 70 and remotepush button unit 60 are illustrated in dotted lines so that some selected portions of the electrical connections within the various components are visible. Power supply 80 is located withinironworker 10. Power supply 80 provides power to theentire ironworker system 40, including its motor for die hydraulics and all system controls. The motor and other various loads in the system are represented by system load 81, also illustrated as withiniron worker 10. In practice, system load 81 is made up of any of various motors, pressure switches, valves, lights and so forth, and they may be located withinironworker 10, or out on accessory tool 50, or at another location. For simplification of the figure, however, system load 81 is illustrated withinironworker 10. - As illustrated, in
FIG. 4 ,negative supply line 84 is coupled to the negative terminal of power supply 80 on one side and coupled to a first side of load (L) 81 on its other side. The second side of load (L) 81 is then routed from withinironworker 10 throughaccessory harness 52 out to first port 86 out at the end ofaccessory harness 52 in one embodiment. First port 86 is located at an end ofaccessory harness 52 that is configured to couple to eithersafety plug assembly 70 or remotepush button unit 60.Positive supply line 82 is coupled to the positive terminal of power supply 80 on one side and coupled to a first side ofemergency stop button 28 on its other side. The second side ofemergency stop button 28 is coupled tosecond port 88 ofaccessory harness 52. Accordingly, pressingemergency stop button 28 breaks or electrically interruptspositive supply line 82.Second port 88 is located adjacent first port at the end ofaccessory harness 52 that is configured to couple to eithersafety plug assembly 70 or remotepush button unit 60. - As also illustrated in
FIG. 4 ,safety plug assembly 70 and remotepush button unit 60 are each configured with first andsecond ports 86 and 88. In operation, either first andsecond ports 86 and 88 ofsafety plug assembly 70 or first andsecond ports 86 and 88 of remotepush button unit 60 are coupled to first andsecond ports 86 and 88 ofaccessory harness 52. Within the simplified schematic illustrated, couplingsafety plug assembly 70 toaccessory harness 52 closes the circuit between positive andnegative supply lines - Similarly, coupling remote
push button unit 60 toaccessory harness 52 also closes the circuit between positive andnegative supply lines emergency stop button 68 has not been depressed, thereby allowing power supply 80 to drive system load 81. Circuitry within the simplified version of remotepush button unit 60 ofFIG. 4 that couples to extend and retractbuttons - When neither
safety plug assembly 70 nor remotepush button unit 60 are coupled toaccessory harness 52, there is an open circuit between positive andnegative supply lines ironworker system 40 is cut off, thereby providing an extra measure of safety protection forsystem 40. -
FIG. 4 also illustrates thatemergency stop buttons ironworker system 40. When remotepush button unit 60 is coupled toaccessory harness 52, actuation of either ofemergency stop buttons positive supply line 82 disabling the system. Becauseemergency stop buttons safety plug assembly 70 is coupled toaccessory harness 52 actuation of firstemergency stop button 28 will create an open circuit inpositive supply line 82 disabling the system. Because remotepush button unit 60 is not connected in that condition, there is no possibility of operator confusion with respect to usingemergency stop button 68. Requiring connection ofsafety plug assembly 70 in order to allow the system to operate provides further safety in require purposeful action by the operator even when accessory tool 50 is not intended to be used. - Although specific embodiments have been illustrated and described herein, it will be appreciated by those of ordinary skill in the art that a variety of alternate and/or equivalent implementations may be substituted for the specific embodiments shown and described without departing from the scope of the present invention. This application is intended to cover any adaptations or variations of the specific embodiments discussed herein. Therefore, it is intended that this invention be limited only by the claims and the equivalents thereof.
Claims (12)
Priority Applications (1)
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US16/129,991 US20190009325A1 (en) | 2015-06-02 | 2018-09-13 | Emergency stop configuration for ironworker |
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US201562169841P | 2015-06-02 | 2015-06-02 | |
US15/066,583 US10144051B2 (en) | 2015-06-02 | 2016-03-10 | Emergency stop configuration for ironworker |
US16/129,991 US20190009325A1 (en) | 2015-06-02 | 2018-09-13 | Emergency stop configuration for ironworker |
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US15/066,583 Continuation US10144051B2 (en) | 2015-06-02 | 2016-03-10 | Emergency stop configuration for ironworker |
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US20190009325A1 true US20190009325A1 (en) | 2019-01-10 |
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US15/066,583 Active US10144051B2 (en) | 2015-06-02 | 2016-03-10 | Emergency stop configuration for ironworker |
US16/129,991 Abandoned US20190009325A1 (en) | 2015-06-02 | 2018-09-13 | Emergency stop configuration for ironworker |
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US10144051B2 (en) * | 2015-06-02 | 2018-12-04 | JPW Industries Holding Corporation | Emergency stop configuration for ironworker |
CN107030300A (en) * | 2017-06-14 | 2017-08-11 | 厦门大学嘉庚学院 | A kind of lathe spindle safety device and its application method |
GB2594945A (en) * | 2020-05-12 | 2021-11-17 | Black & Decker Inc | A power tool |
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US10144051B2 (en) * | 2015-06-02 | 2018-12-04 | JPW Industries Holding Corporation | Emergency stop configuration for ironworker |
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US4726786A (en) * | 1986-03-17 | 1988-02-23 | Hill Jesse S | Direct current battery connector |
US5575186A (en) * | 1993-10-06 | 1996-11-19 | Peddinghaus Corporation | Machine tool stroke control system |
US6568493B2 (en) * | 2001-07-13 | 2003-05-27 | Mark Joesph Parkert | Skid-steer loader power source attachment and method of manufacture |
US7214011B2 (en) * | 2003-10-20 | 2007-05-08 | Hy-Ko Products Company | Key cutting machine |
US7870915B2 (en) * | 2006-11-28 | 2011-01-18 | Illinois Tool Works Inc. | Auxiliary service pack for a work vehicle |
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US10144051B2 (en) * | 2015-06-02 | 2018-12-04 | JPW Industries Holding Corporation | Emergency stop configuration for ironworker |
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US10144051B2 (en) | 2018-12-04 |
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