EP3269906A1 - Dispositif de déverrouillage de porte pour machine de construction - Google Patents

Dispositif de déverrouillage de porte pour machine de construction Download PDF

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Publication number
EP3269906A1
EP3269906A1 EP17174673.8A EP17174673A EP3269906A1 EP 3269906 A1 EP3269906 A1 EP 3269906A1 EP 17174673 A EP17174673 A EP 17174673A EP 3269906 A1 EP3269906 A1 EP 3269906A1
Authority
EP
European Patent Office
Prior art keywords
door
inner handle
handle
locking device
link rod
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.)
Withdrawn
Application number
EP17174673.8A
Other languages
German (de)
English (en)
Inventor
Tsuyoshi Noda
Haruo NII
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobelco Construction Machinery Co Ltd
Original Assignee
Kobelco Construction Machinery Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobelco Construction Machinery Co Ltd filed Critical Kobelco Construction Machinery Co Ltd
Publication of EP3269906A1 publication Critical patent/EP3269906A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B79/00—Mounting or connecting vehicle locks or parts thereof
    • E05B79/10—Connections between movable lock parts
    • E05B79/12—Connections between movable lock parts using connecting rods
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B53/00—Operation or control of locks by mechanical transmissions, e.g. from a distance
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B79/00—Mounting or connecting vehicle locks or parts thereof
    • E05B79/10—Connections between movable lock parts
    • E05B79/22—Operative connections between handles, sill buttons or lock knobs and the lock unit
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B83/00—Vehicle locks specially adapted for particular types of wing or vehicle
    • E05B83/36—Locks for passenger or like doors
    • E05B83/42—Locks for passenger or like doors for large commercial vehicles, e.g. trucks, construction vehicles or vehicles for mass transport

Definitions

  • the present invention relates to a door unlocking device for a construction machine.
  • a door unlocking device for a construction machine including a locking device for locking a door of a cab and capable of unlocking the door from the outside and inside of the cab, has been known.
  • JP 2004-360205 A discloses a configuration in which an operating lever of an outer handle lever is interlocked with a locking device via a push-pull cable, while an operating lever of an inner handle lever is interlocked with the locking device via a pin caulked to the operating lever.
  • JP 2008-14027 A discloses a configuration in which an open-close handle inside a cab is connected to a bell crank via a rod member, while an open-close handle outside the cab is connected to the bell crank via a lock link mechanism and a rod member.
  • the conventional configuration in which interlocking of the outer handle with the locking device and interlocking of the inner handle with the locking device are performed via the respective separate members, requires more parts for an entire device and is complicated in assembling.
  • An object of the present invention is to provide a door unlocking device that is of relatively simple configuration and has good assembling workability and unlocking operability.
  • the present invention is directed to a door unlocking device for a construction machine including a cab having an openable and closable door and a locking device for locking the door, and provides the following solution.
  • a door unlocking device includes an outer handle, an inner handle, and a link rod.
  • the outer handle is supported by the door and operated to unlock the door from an outside of the cab.
  • the inner handle is supported by the door, operated to unlock the door from an inside of the cab, and rotatable about a predetermined rotation axis.
  • the link rod is supported by the door, has an inner end and an outer end, and connects the inner handle and the outer handle.
  • the inner handle includes, in order to unlock the door, an operating arm subjected to an operating force about the rotation axis, a release arm for performing an unlock operation on the locking device associated with rotational movement of the inner handle caused by the operating force, and a connecting arm connected to the inner end of the link rod.
  • the outer handle includes an operative portion operated to unlock the door and a portion connected to the outer end of the link rod.
  • the link rod rotates the inner handle about the rotation axis in conjunction with the operation of the outer handle, thereby causing the release arm to perform an unlock operation on the locking device.
  • a position of a center of gravity of the inner handle is located on a vertical line passing through the rotation axis when viewed from a direction parallel to an axial center of the rotation axis.
  • a construction machine 10 which is a hydraulic excavator, includes a crawler-type lower traveling body 11 and an upper slewing body 12 turnably mounted on the lower traveling body 11.
  • the construction machine 10 also includes an attachment 13, a cab 20, a machine room cover 16, and a counterweight 17.
  • the upper slewing body 12 has an upper frame 15.
  • the attachment 13 for an excavation operation or the like is attached to the front central portion of the upper frame 15.
  • the attachment 13 includes a boom 13a attached so as to be capable of vertical pivotal movement relative to the upper frame 15, an arm 13b rotatably attached to the distal end of the boom 13a, a bucket 13c rotatably attached to the distal end of the arm 13b, and a plurality of hydraulic cylinders 13d.
  • the boom 13a, the arm 13b, and the bucket 13c can be vertically moved by extending and contracting the respective hydraulic cylinders 13 d.
  • the cab 20 is located on the left side of the attachment 13 on the upper frame 15.
  • Control valves, engine and the like are located on the back of the upper frame 15, and they are covered by the machine room cover 16.
  • the counterweight 17 is located on the back of the machine room cover 16.
  • the cab 20 includes a door 21, a locking device 50, and a door unlocking device 25.
  • the door 21, which can be opened and closed, is provided on the left side of the cab 20.
  • the door 21 has a locking device 50 therein for locking the door 21 in a closed state.
  • the locking device 50 is interlocked with a door unlocking device 25.
  • the door unlocking device 25 includes an outer handle 40 that is supported by the door 21 and releases the lock of the door 21 provided by the locking device 50 from the outside of the cab 20, an inner handle 30 that is supported by the door 21 and releases the lock of the door 21 provided by the locking device 50 from the inside of the cab 20, a link rod 48 supported by the door 21.
  • the door unlocking device 25 unlocks the door 21, the door 21 can be opened.
  • the outer handle 40 is provided at the lower position of the left side of the door 21, the outer handle 40 being operated by an operator to unlock the locked door 21 from the outside of the cab 20.
  • the outer handle 40 includes an attachment bracket 41, an outer rotation shaft 42, an operating lever 43, a bias spring 44, and a grip portion 45 (i.e., an operative portion).
  • the attachment bracket 41 is provided in the door 21.
  • the outer rotation shaft 42 is provided in the attachment bracket 41 and extends widthwise.
  • the operating lever 43 is rotatably supported about the outer rotation shaft 42.
  • the bias spring 44 biases the operating lever 43 in a locking direction (i.e., in the clockwise direction in FIG. 2 ).
  • the grip portion 45 is proximally pulled (i.e., operated) from the outside of the cab 20 by the operator, and thus rotating the operating lever 43 in an unlocking direction.
  • the operating lever 43 includes a connecting portion 43a (i.e., a connected portion) connected to the lower end (i.e., outer end) of the link rod 48 connecting the inner handle 30 and the outer handle 40, and a spring hook 43b with which the bias spring 44 is engaged.
  • the operating lever 43 is rotated counterclockwise in FIG. 2 by the operator pulling the grip portion 45 proximally.
  • the link rod 48 is pulled downward, so that the inner handle 30 rotates in conjunction with the operation of the operator pulling the grip portion 45.
  • the door unlocking device 25 includes a holding bracket 60 (i.e., a bracket) supported by the door 21.
  • the inner handle 30 and the locking device 50 which are held by the holding bracket 60, are supported by the door 21.
  • all three of a subassembly of the inner handle 30, a subassembly of the outer handle 40, and a subassembly in which the holding bracket 60 holds the locking device 50 are prepared and assembled in advance, and this facilitates assembling these subassemblies to the door 21 easily.
  • the locking device 50 includes a striker 23 ( FIG. 7 ) provided near the door 21 in the cab 20, a pair of upper and lower striker catches 51 for gripping and locking the striker 23, a body 52 for openably and closably supporting the striker catches 51, and a release lever 54 that includes a pivot shaft 53 and releases the locked striker catches 51 by pivoting about the pivot shaft 53.
  • the holding bracket 60 includes a left side wall 61, a front wall 62 extending rightward from the front edge of the left side wall 61, an upper wall 63 extending over the upper edge of the left side wall 61 and the upper edge of the front wall 62, and a support portion 65.
  • the support portion 65 is positioned on a right side surface of the left side wall 61 to extend to the right and rotatably supports the inner handle 30 about a predetermined rotation axis.
  • the front wall 62 is formed of four through-holes 62a.
  • the body 52 of the locking device 50 is formed of four screw holes 52a corresponding to the four through-holes 62a formed in the front wall 62 of the holding bracket 60.
  • the front wall 62 of the holding bracket 60 is fastened together by a plurality of fastening bolts 70 with sandwiched between an inner panel 22 of the door 21 and the body 52 of the locking device 50. In this manner, the holding bracket 60 is attached to the door 21.
  • the striker catches 51 which can be opened and closed at the right side of the body 52, are located in a position where the striker catches 51 engage with the striker 23 when the door 21 is closed.
  • the inner handle 30 is longitudinally (in the front and rear direction) rotatable about the support portion 65.
  • the inner handle 30 includes, in order to unlock the door 21, an operating arm 31 that is subjected to an operating force about the rotation axis and provides rotational movement to the inner handle 30, a release arm 32 for performing an unlock operation on the locking device 50 associated with the rotational movement of the inner handle 30 caused by the operating force, and a connecting arm 33 connected to the upper end (i.e., inner end) of the link rod 48.
  • the inner handle 30 further includes a cylindrical body 34 extending to the left and fitting with the support portion 65 and a resin washer 35 (see FIG. 3 ).
  • the resin washer 35 as a resin spacer member is fitted to the outer periphery of the support portion 65.
  • the resin washer 35 is sandwiched between the left side wall 61 of the holding bracket 60 and the cylindrical body 34 of the inner handle 30. This reduces the frictional resistance between the inner handle 30 and the holding bracket 60, so that the unlocking operation of the inner handle 30 can be smoothly performed.
  • a fastening bolt 70 is inserted through the rotational center (i.e., the cylindrical body 34) of the inner handle 30.
  • the inner handle 30 and the support portion 65 are fastened with the fastening bolt 70, and thus the inner handle 30 is rotatably supported about a predetermined rotation axis around the support portion 65.
  • the inner handle 30 is also provided with a metal washer 36. The metal washer 36 is sandwiched between the inner handle 30 and the fastening bolt 70.
  • the operating arm 31 When viewed from the side as shown in FIG. 5 , the operating arm 31 is shaped to curve obliquely forward as it extends upward and then to curve again to extend upward.
  • the operating arm 31 has a knob 37 gripped by the operator.
  • the knob 37 is attached to the upper end of the operating arm 31.
  • a position G of a center of gravity of the inner handle 30 is set such that the position G is located on a vertical line passing through the axial center (i.e., rotation axis) of the support portion 65 when the unlock operation on the locking device 50 is not performed (i.e., when the door 21 is locked by the locking device 50).
  • Such a configuration prevents the inner handle 30 from being tilted toward the locked position or the unlocked position due to the weight imbalance of the inner handle 30, and the inner handle 30 can maintain a neutral posture.
  • the outer handle 40 is not subjected to the weight of the inner handle 30 via the link rod 48, thereby achieving good operability for unlocking.
  • the operating arm 31 When viewed from the rear as shown in FIG. 4 , the operating arm 31 has a shape bent to the right as the operating arm 31 extends upward from the proximal end of the cylindrical body 34 and then further bent again to extend upward. In this manner, since an offset amount of the upper end of the operating arm 31 to the right is set equal to an offset amount of the connecting arm 33 extending to the left in FIG. 4 from the operating arm 31, the position G of the center of gravity of the inner handle 30 is set such that the position G is located at the substantial center of the operating arm 31 in the transverse direction. Thus, the operator can smoothly rotate the operating arm 31 longitudinally.
  • the release arm 32 extends forward from the proximal end of the cylindrical body 34 and is shaped such that the distal end of the release arm 32 is bent to the right.
  • the inner handle 30 further includes a bias spring 38.
  • the bias spring 38 biases the release arm 32 in the locking direction (i.e., in the clockwise direction about the support portion 65 in FIG. 5 ).
  • One end of the bias spring 38 is engaged with the release arm 32.
  • the other end of the bias spring 38 is engaged with the holding bracket 60.
  • the link rod 48 rotates the inner handle 30 about the rotation axis in conjunction with the operation of the outer handle 40, thereby causing the release arm 32 to perform an unlock operation on the locking device 50.
  • the link rod 48 has an inner end at its upper end and an outer end at its lower end and connects the inner handle 30 and the outer handle 40.
  • the operating arm 31 is pulled backward and the release arm 32 is rotated counterclockwise against the biasing force of the bias spring 38 as indicated by the arrow in FIG. 6 , and thus the release arm 32 raises the rear end of the release lever 54 of the locking device 50. Then, the front end of the release lever 54 pivots clockwise about the pivot shaft 53, thereby unlocking the locking device 50.
  • the connecting arm 33 has a rod holder 39 ( FIGS. 3 and 6 ).
  • the rod holder 39 holds the upper end of the link rod 48.
  • the unlocking operation causes the link rod 48 to be pulled downward, so that the inner handle 30 rotates counterclockwise about the support portion 65 in FIG. 6 , the release arm 32 raises the rear end of the release lever 54, and the locking device 50 is unlocked.
  • the amount of downward movement of the front end of the release lever 54 can be increased as compared with the amount by which the release lever 54 is raised. As such, the operability for unlocking is improved.
  • an opening hole 26 and a guide hole 27 are formed in the inner panel 22 of the door 21, an opening hole 26 and a guide hole 27 are formed.
  • the opening hole 26 is used for assembly and maintenance of the locking device 50 and the inner handle 30.
  • the operating arm 31 of the inner handle 30 is inserted through the guide hole 27, which allows the operating arm 31 to be longitudinally pivotable.
  • the opening hole 26 is closed by a closing plate 28 with only the striker catches 51 of the locking device 50 exposed, as illustrated in FIG. 8 .
  • the closing plate 28 is fastened to the inner panel 22 by fastening bolts 70.
  • the present invention which has a practical advantage that the door unlocking device can be provided that is of relatively simple configuration and has good assembling workability and unlocking operability, is extremely useful and has high industrial applicability.
  • the present invention is directed to a door unlocking device for a construction machine including a cab having an openable and closable door and a locking device for locking the door and provides the following solution.
  • a door unlocking device includes an outer handle, an inner handle, and a link rod.
  • the outer handle is supported by the door and operated to unlock the door from an outside of the cab.
  • the inner handle is supported by the door, operated to unlock the door from an inside of the cab, and rotatable about a predetermined rotation axis.
  • the link rod is supported by the door, has an inner end and an outer end, and connects the inner handle and the outer handle.
  • the inner handle includes, in order to unlock the door, an operating arm subjected to an operating force about the rotation axis, a release arm for performing an unlock operation on the locking device associated with rotational movement of the inner handle caused by the operating force, and a connecting arm connected to the inner end of the link rod.
  • the outer handle includes an operative portion operated to unlock the door and a portion connected to the outer end of the link rod.
  • the link rod rotates the inner handle about the rotation axis in conjunction with the operation of the outer handle, thereby causing the release arm to perform an unlock operation on the locking device.
  • the position of the center of gravity of the inner handle is located on a vertical line passing through an axial center of the rotation axis when viewed from a direction parallel to the axial center of the rotation axis.
  • the inner handle includes the operating arm, the release arm, and the connecting arm.
  • the inner handle and the outer handle are connected via the link rod.
  • the inner handle rotates via the link rod, and the locking device is unlocked.
  • connecting the inner handle and the outer handle with the link rod allows the unlocking operation to be performed by interlocking the inner handle with the outer handle.
  • the position of the center of gravity of the inner handle is located on a vertical line passing through the rotation axis when the unlock operation on the locking device is not performed (i.e., when the door is locked by the locking device), the weight imbalance of the inner handle is prevented and the inner handle is prevented from being tilted toward the locked position or the unlocked position, so that the inner handle can maintain a neutral posture.
  • the outer handle is not subjected to the weight of the inner handle via the link rod, thereby achieving good operability for unlocking.
  • bracket that includes a support portion for rotatably supporting the inner handle about the rotation axis and is supported by the door; and a resin spacer member that is located around the support portion and sandwiched between the inner handle and the bracket.
  • Such a configuration in which the resin spacer member is sandwiched between the inner handle and the bracket, reduces the frictional resistance between the inner handle and the bracket. This allows the unlocking operation of the inner handle to be smoothly performed and makes it easier to return the inner handle to a neutral posture.
  • the unlocking operation can be performed by interlocking the inner handle with the outer handle, which reduces the number of parts and achieves good assembling workability. Furthermore, since the position of the center of gravity of the inner handle is suitably set, the outer handle is not subjected to the weight of the inner handle via the link rod when the unlocking operation is performed using the outer handle, thereby achieving good operability for unlocking.
  • This application is based on Japanese Patent application No. 2016-139110 filed in Japan Patent Office on July 14, 2016, the contents of which are hereby incorporated by reference.
  • the inner handle which is rotatable about a support portion, includes an operating arm, a release arm for performing an unlock operation on a locking device, and a connecting arm connected to a link rod.
  • a position of a center of gravity of the inner handle is located on a vertical line passing through the axial center of the support portion.
  • the link rod rotates the inner handle in conjunction with the operation of the outer handle, thereby performing an unlock operation on the locking device.
EP17174673.8A 2016-07-14 2017-06-07 Dispositif de déverrouillage de porte pour machine de construction Withdrawn EP3269906A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016139110A JP2018009369A (ja) 2016-07-14 2016-07-14 建設機械のドアロック解除装置

Publications (1)

Publication Number Publication Date
EP3269906A1 true EP3269906A1 (fr) 2018-01-17

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ID=59021408

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Application Number Title Priority Date Filing Date
EP17174673.8A Withdrawn EP3269906A1 (fr) 2016-07-14 2017-06-07 Dispositif de déverrouillage de porte pour machine de construction

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EP (1) EP3269906A1 (fr)
JP (1) JP2018009369A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7103048B2 (ja) 2018-08-07 2022-07-20 コベルコ建機株式会社 建設機械のドアロック解除装置
JP7237035B2 (ja) * 2020-02-27 2023-03-10 日立建機株式会社 建設機械

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6040768U (ja) * 1983-08-26 1985-03-22 日産自動車株式会社 リモ−トコントロ−ルケ−ブルの連結部構造
JPH1150714A (ja) * 1997-07-31 1999-02-23 Ryosei Denso Kk 電動ドアロック機構
JP2000282730A (ja) * 1999-03-29 2000-10-10 Press Kogyo Co Ltd 建設機械のスライドドアロック装置
JP2004360205A (ja) 2003-06-02 2004-12-24 Hitachi Constr Mach Co Ltd 建設機械のドア開閉装置
JP2008014027A (ja) 2006-07-06 2008-01-24 Komatsu Ltd 建設機械のドアロック解除機構
WO2013090060A1 (fr) * 2011-12-12 2013-06-20 Chrysler Group Llc Liaison d'actionnement de verrouillage sensible à l'impact pour portière de véhicule

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6040768U (ja) * 1983-08-26 1985-03-22 日産自動車株式会社 リモ−トコントロ−ルケ−ブルの連結部構造
JPH1150714A (ja) * 1997-07-31 1999-02-23 Ryosei Denso Kk 電動ドアロック機構
JP2000282730A (ja) * 1999-03-29 2000-10-10 Press Kogyo Co Ltd 建設機械のスライドドアロック装置
JP2004360205A (ja) 2003-06-02 2004-12-24 Hitachi Constr Mach Co Ltd 建設機械のドア開閉装置
JP2008014027A (ja) 2006-07-06 2008-01-24 Komatsu Ltd 建設機械のドアロック解除機構
WO2013090060A1 (fr) * 2011-12-12 2013-06-20 Chrysler Group Llc Liaison d'actionnement de verrouillage sensible à l'impact pour portière de véhicule

Also Published As

Publication number Publication date
JP2018009369A (ja) 2018-01-18

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