WO2018012047A1 - Cabine pour engin de construction - Google Patents

Cabine pour engin de construction Download PDF

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Publication number
WO2018012047A1
WO2018012047A1 PCT/JP2017/012681 JP2017012681W WO2018012047A1 WO 2018012047 A1 WO2018012047 A1 WO 2018012047A1 JP 2017012681 W JP2017012681 W JP 2017012681W WO 2018012047 A1 WO2018012047 A1 WO 2018012047A1
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WO
WIPO (PCT)
Prior art keywords
link
cab
guide rail
front window
held
Prior art date
Application number
PCT/JP2017/012681
Other languages
English (en)
Japanese (ja)
Inventor
剛 野田
和愛 小林
Original Assignee
コベルコ建機株式会社
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 コベルコ建機株式会社 filed Critical コベルコ建機株式会社
Priority to JP2018527388A priority Critical patent/JP6743890B2/ja
Publication of WO2018012047A1 publication Critical patent/WO2018012047A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/16—Cabins, platforms, or the like, for drivers
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F11/00—Man-operated mechanisms for operating wings, including those which also operate the fastening
    • E05F11/38—Man-operated mechanisms for operating wings, including those which also operate the fastening for sliding windows, e.g. vehicle windows, to be opened or closed by vertical movement
    • E05F11/48—Man-operated mechanisms for operating wings, including those which also operate the fastening for sliding windows, e.g. vehicle windows, to be opened or closed by vertical movement operated by cords or chains or other flexible elongated pulling elements, e.g. tapes

Definitions

  • the present invention relates to a cab for a construction machine having a front window.
  • a cab of a construction machine a cab frame, a front window frame surrounding a front opening, a front window that opens and closes the front opening, guide rollers provided on both left and right sides of the front window frame,
  • guide rollers provided on both left and right sides of the front window frame
  • guide rails provided on the left and right sides of the cab frame, and the front window moves in the opening and closing direction by sliding movement of the guide roller along the guide rail.
  • Patent Document 1 includes a front window, a link having an upper end portion rotatably connected to the upper portion thereof, and a lower end portion on the opposite side, and an assist cable connected to the lower end portion of the link.
  • An opening / closing device provided is disclosed.
  • a tensile force is applied to the lower end portion of the link through the assist cable. The tensile force assists the movement of the front window to the open position, while when the front window is in the closed position, the front window is rotated in the forward tilt direction with the lower end of the link as a fulcrum. It acts as a force that pushes the upper end of the window forward.
  • An object of the present invention is to provide a cab of a construction machine that includes a front window and that can move smoothly between a closed position and an open position.
  • a cab for a construction machine which is movable between a cab body in which a front opening is formed, a closed position that closes the front opening, and an open position that opens the front opening.
  • a front window having a plurality of window-side held bodies including an upper side held body positioned at an upper end portion of the front window in the closed position; and disposed in the cab body, the front window
  • a guide rail that guides and holds the window-side holder so that it moves between the closed position and the open position, and an assist cable that biases the front window in the opening direction toward the open position
  • a first link connected to the assist cable and movable along the guide rail while being held by the guide rail, and a moving direction of the link-side moving body with respect to the front window and the first link, respectively
  • a second link coupled so as to be rotatable about a right and left axis orthogonal to each other, and the second link is formed by the rotation of the second link with respect to the front window and the first link.
  • FIG. 1 is a side view of a construction machine according to an embodiment of the present invention. It is a side view which shows the closed position and open position of the front window in the cab of the said construction machine. It is a perspective view of the front window. It is a perspective view of the link mechanism in the said cab. It is a perspective view which shows the left guide rail inside the said cab. It is a side view which shows the state which the upper side roller of the said front window exists in a removal position. It is a side view which shows the state which has the said upper side roller in a held position. It is a side view which shows a mode that the said front window moves along the said guide rail. It is a perspective view which shows the holding part holding the assist cable of the said cab.
  • FIG. 1 shows the construction machine 10 according to the embodiment.
  • the construction machine 10 is a so-called hydraulic excavator, and performs excavation work and the like with a crawler-type lower traveling body 11 and an upper revolving body 12 having an upper frame 15 that is pivotably mounted on the lower traveling body 11.
  • the work attachment 13 is provided.
  • the work attachment 13 is attached to a front center portion of the upper frame 15 so as to be pivotable in the vertical direction with respect to the upper frame 15, and is pivotally attached to a tip portion of the boom 13a.
  • Including
  • the upper swing body 11 includes a cab 20 located on the left side of the attachment 13 on the upper frame 15, a machine room cover 16 that covers a control valve, an engine, and the like (not shown) mounted on the rear portion of the upper frame 15, And a counterweight 17 located on the rear side of the machine room cover 16.
  • the cab 20 includes a cab body 21 shown in FIGS. 1 and 2, a front window 22 shown in FIGS. 2 and 3, and a front window opening / closing device 30.
  • the cab body 21 is formed with a front opening 21 a that opens to the front side of the upper swing body 11.
  • the front window 22 is movable between a closed position that closes the front opening 21a and an open position that is behind the closed position and opens the front opening 21a, that is, movable in the opening and closing direction. It is.
  • the front window opening / closing device 30 moves the front window 22 in the opening / closing direction.
  • the front window 22 includes a window frame 23 constituting a main body (outer peripheral frame) of the front window 22, a transparent window glass 24, a pair of left and right upper rollers 25 ⁇ / b> A, and a pair of right and left A lower roller 25B, and a peripheral edge of the window glass 24 is attached to the front surface of the window frame 23.
  • the front window opening and closing device 30 includes a pair of left and right guide rails 31 disposed in the cab body 21, an assist cable 35, a first link, and a second link.
  • Each of the upper and lower rollers 25 ⁇ / b> A and 25 ⁇ / b> B corresponds to a window-side holder to be held by the guide rail 31 so as to move along the pair of left and right guide rails 31.
  • the assist cable 35 is connected to the front window 22 and biases the front window 22 in the direction toward the opening position, that is, in the opening direction.
  • the first link includes a first link plate 40 that is a link main body connected to the assist cable 35 and a plurality of link-side rollers 41.
  • the plurality of link-side rollers 41 correspond to a plurality of link-side held members that are held by the guide rail 31 so as to be movable along the guide rail 31 together with the first link plate 40 that is the link body. .
  • the second link includes a second link plate 45.
  • the second link plate 45 is at both ends in the longitudinal direction, and is connected to the front window 22 and the first link plate 40 so as to be pivotable about a horizontal axis, respectively, and a window side end and a link side. Has an end.
  • Each of the pair of left and right guide rails 31 has a cross-sectional shape that opens to the inside of the cab body 21, specifically, a bottom wall 31a that is located outside in the left-right direction and faces the inside of the cab body 21, and the bottom A pair of side walls extending from both edges of the wall toward the inside of the cab body 21, that is, an outer side wall 31b and an inner side wall 31c are provided.
  • the pair of left and right guide rails 31 are fixed to the inner side surfaces of the left and right side walls of the cab main body 21, and the upper roller 25 ⁇ / b> A extends from the front opening 21 a along the ceiling of the cab main body 21 of the upper swing body 11. It extends to guide backwards.
  • the pair of upper rollers 25A and the pair of lower rollers 25B are attached to the upper and lower ends of the left and right side surfaces of the window frame 23, respectively.
  • the upper and lower rollers 25A and 25B are rotatably supported by a plurality of roller shafts 23a, which are support shafts protruding outward from the window frame 23 in the left-right direction.
  • the pair of upper rollers 25A provided at the upper end portion of the window frame 23 corresponds to the upper held body according to the present invention as will be described later.
  • the front window 22 moves between the closed position and the open position in accordance with the movement of the upper and lower rollers 25A and 25B along the guide rail 31.
  • the front window 22 closes the front opening 21a at the closed position indicated by a solid line in FIG. 2, and the front window 22 opens along the ceiling of the cab body 21 at the open position indicated by a two-dot chain line in FIG.
  • the front opening 21a is opened by retracting backward from the portion 21a.
  • the front window opening / closing device 30 further includes a lock mechanism for locking the front window 22 in each of the closed position and the open position.
  • the locking mechanism includes a pair of left and right engaged portions 50 attached to the front window 22 and a plurality of strikers 52 respectively attached to the pair of left and right guide rails 31.
  • the pair of left and right engaged portions 50 are respectively provided at both left and right end portions of the upper edge portion of the window frame 23.
  • the plurality of strikers 52 are respectively provided at the front end portion and the rear end portion of the pair of left and right guide rails 31 corresponding to the closed position and the open position of the front window 22.
  • the plurality of strikers 52 may be attached to the cab body 21.
  • Each of the locked portions 50 can be engaged with any one of the plurality of strikers 52, so that the front window 22 is in the closed position or the opened position, and the cab body 21. Allows to be locked into.
  • Each of the locked portions 50 includes a release lever 51, and the engagement between the locked portion 50 and an arbitrary striker 52 is released by an operation of pulling the release lever 51 forward, and thus the front window 22 is locked. Is easily released.
  • the guide rail 31 has a stopper 53 at its rear end.
  • the stopper 53 contacts the window frame 23 of the front window 22 to position the front window 22 at the open position.
  • the front window 22 further has a link restricting plate 28 shown in FIG.
  • the link restricting plate 28 projects rearward from the left end portion of the upper edge portion of the window frame 23.
  • the link restricting plate 28 restricts movement of the first and second link plates 40 and 45, which will be described later, in the vehicle width direction, that is, the left-right direction.
  • the front window 22 further includes a pair of left and right upper handles 26 shown in FIG. 3, a lower handle (not shown), and a seal member 27.
  • the upper handle 26 is disposed at a position separated from each other in the left-right direction at the upper edge of the window frame 23 and projects rearward from the upper edge.
  • the upper handle 26 is a handle to be held by an operator in order to move the front window 22 in the opening / closing direction.
  • the lower handle is provided at the center position in the left-right direction of the lower edge of the window frame 23.
  • the seal member 27 is attached to the lower edge portion of the window frame 23 and is in close contact with a lower front window (not shown) disposed further below the front window 22 in the closed position.
  • the assist cable 35 biases the front window 22 in the opening direction, that is, in the direction from the closed position toward the open position in order to make the movement in the opening / closing direction of the front window 22 smooth.
  • a rear end portion connected to the balancer spring, and a front end portion connected to the upper end portion of the first link plate 40;
  • the assist cable 35 transmits the spring force of the balancer spring to the front window 22 via the first and second link plates 40 and 45, thereby urging the front window 22 in the opening direction.
  • the front window opening and closing device 30 further includes a cable holder 54 shown in FIGS.
  • the cable holder 54 is formed of a cylindrical member and is provided at a position near the rear end of the guide rail 31 and suppresses the shake of the assist cable 35 while allowing the assist cable 35 to be inserted.
  • the connection mechanism includes a held shaft 36 and a holding portion 37 as shown in FIG.
  • the held shaft 36 is connected to the front end portion of the assist cable 35 and extends in a direction orthogonal to the longitudinal direction of the assist cable 35, in this embodiment, the left-right direction.
  • the holding portion 37 is provided at the upper end portion of the first link plate 40 and holds the held shaft 36 so as to be swingable about its own axis.
  • the plurality of link-side rollers 41 are two link-side rollers 41 arranged at a distance from each other along the guide path of the guide rail 31, and in the posture shown in FIGS.
  • the first link plate 40 is rotatably attached to the first link plate 40 at a position below the holding portion 37.
  • Each link-side roller 41 is held by the guide rail 31 so as to be movable in the guide rail 31 as shown in FIG.
  • the upper and lower link side rollers 41 are rotatably supported by roller shafts 41a and 41c, respectively.
  • a roller shaft 41 a that supports the upper link side roller 41 is formed integrally with the first link plate 40 and protrudes outward in the left-right direction from the first link plate 40.
  • a roller shaft 41c that supports the lower link side roller 41 protrudes outward in the left-right direction from the lower end portion of the second link plate 45, and has a shaft hole 41b formed in the lower end portion of the first link plate 40. It penetrates. That is, the front end portion of the roller shaft 41c protrudes further outward in the left-right direction than the first link plate 40, and the lower link side roller 41 is rotatably attached to the protruding front end portion. That is, the lower link side roller 41 is rotatably attached to the first link plate 40 via the roller shaft 41 c formed on the second link plate 45.
  • the first link plate 40 has a curved portion 43.
  • the curved portion 43 is located between the two link-side rollers 41, and the second link plate 45 rotates about the roller shaft 41c with respect to the first link plate 40, so that the upper roller 25A Specifically, the upper roller 25A and its roller shaft 23a and the first link plate 40 are prevented from overlapping in a side view when moved to the held position shown in FIG. 25A is curved so as to be held between the two side walls 31b and 31c of the guide rail 31 together with the two link side rollers 41 at a position between the two link side rollers 41.
  • a washer 46 is disposed around the roller shaft 41 c that supports the lower link side roller 41, and the washer 46 is sandwiched between the first and second link plates 40.
  • the roller shaft 41a constitutes a link shaft that penetrates the shaft hole 41b of the first link plate 40 and connects the second link plate 45 and the first link plate 40 while allowing relative rotation between them. is doing.
  • the roller shaft 23a protruding from the upper end of the left side surface of the window frame 23 passes through a shaft hole 45a formed in the upper end of the second link plate 45, thereby The front end portion of the roller shaft 23a protrudes outward in the left-right direction from the second link plate 45, and the upper roller 25A is attached to the front end portion.
  • the roller shaft 23a functions as a support shaft that supports the upper roller 25A, and also functions as a link shaft that connects the front window 22 and the second link plate 45 while allowing relative rotation between the front window 22 and the second link plate 45. This makes it possible to reduce the number of parts constituting the link mechanism.
  • the support shaft of the upper roller 25A and the link shaft may be different.
  • the first link plate 40 has a protruding portion 40a that protrudes above the upper surface of the guide rail 31 in the posture shown in FIGS. 5 and 6, that is, the posture when the front window 22 is in the closed position. And the front-end part of the said assist cable 35 is connected to the said protrusion part 40a via the said connection mechanism. This allows the assist cable 35 to be routed along the upper surface of the guide rail 31.
  • the guide rail 31 includes a portion that extends substantially linearly along the ceiling of the cab body 21. This portion minimizes the expansion and contraction of the assist cable 35 due to contact with the guide rail 31 and suppresses damage to the assist cable 35.
  • the guide rail 31 includes a plurality of restricting portions 32.
  • the plurality of restricting portions 32 are formed on the outer side wall (that is, the upper side wall) 31b of the portion of the guide rail 31 that extends along the ceiling, and are arranged at two positions in the front-rear direction. It protrudes upwards from other parts.
  • the plurality of restricting portions 32 are portions that restrict movement of the assist cable 35 in the vehicle width direction. The restricting portion 32 restricts the assist cable 35 from dropping from the guide rail 31 due to the swing of the assist cable 35 in the vehicle width direction.
  • the second link plate 45 rotates relative to the first link plate 40 around the lower roller shaft 41c like a ridge so that the pair of upper links can be operated with a relatively light operating force.
  • Each of the rollers 25A can be moved between the held position shown in FIG. 7 and the separation position shown in FIG.
  • the held position is a position where the upper roller 25A is held by the guide rail 31 so that the upper roller 25A can move along the guide rail 31 together with the link side roller 41, and the detached position is the front window 22.
  • the position of the front window 22 shown in FIG. 7 is a retracted position between the closed position and the open position, and the front window 22 is retracted rearward from the front opening 21a as it is. .
  • a branch rail 33 as shown in FIGS. 6 and 7 is integrally connected to the guide rail 31 in order to allow the upper roller 25A to move from the held position to the detached position.
  • the branch rail 33 branches from the guide path of the upper roller 25A in the middle portion of the guide rail 31 and extends to the front side, and guides the upper roller 25A from the held position in the guide path to the release position.
  • the outer side wall 31b of the guide rail 31 is partially absent in the vicinity of the upper end of the front opening 21c, and the branch rail 33 is connected to the guide rail 31 at the missing portion.
  • the cab 20 further includes a seal member 29.
  • the seal member 29 is attached to a portion of the cab main body 21 that surrounds the front opening 21a, that is, a peripheral edge of the opening, and has a close contact portion 29a. As shown in FIG. 7, the contact portion 29a is in close contact with the window glass 24 of the front window 22 that has advanced from the position spaced rearward from the front opening 21a to the closed position shown in FIG.
  • the cab 20 further includes a rotation restricting member, in this embodiment, a fixing pin 34 shown in FIGS.
  • the fixing pin 34 is located on the upper side of the branch rail 33, and the second link before the front window 22 reaches the position facing the front opening 21a when the front window 22 moves toward the closed position.
  • the plate 45 is restricted from rotating relative to the first link plate 40.
  • the guide rail 31 has a lower end 31e as shown in FIG.
  • the lower end 31e is a terminal position of the lower roller 25B as shown in FIG. 2 as the front window 22 descends from the open position to the retracted position.
  • Guidance is made to such a position as to be in the closed position (that is, it is moved slightly forward).
  • a first opening operation is performed.
  • the upper window 25A of the front window 22 is moved in the branch rail 33 from the disengagement position shown in FIG. 6 to the held position shown in FIG. This is an operation of retreating from the closed position shown to the position shown in FIG.
  • the passenger only needs to pull the front window 22 slightly forward in the cab body 21 as the opening operation. Thereafter, the front window 22 retracts to its retracted position (position corresponding to the position where the upper roller 25A is held) as shown in FIG. In this way, the burden on the operator is reduced.
  • the pair of left and right lower rollers 25B of the front window 22 is held at a position corresponding to the closed position of the front window 22 at the lower end 31e of the guide rail 31. Therefore, the backward movement of the front window 22 from the closed position (FIG. 6) to the retracted position (FIG. 7) accompanying the movement of the upper roller 25A from the disengaged position to the held position is the pair of left and right This is realized by a stable operation of turning the front window 22 with the lower roller 25B as a fulcrum.
  • the curved portion 43 of the first link plate 40 has a shape that avoids the upper roller 25A and its roller shaft 23a that are close to the curved portion 43, so that the first link plate 40 and the upper roller Interference with 25A and its roller shaft 23a is prevented. Accordingly, both the upper roller 25 ⁇ / b> A and the link side roller 41 can be held by the guide rail 31 so as to be aligned in the guide rail 31.
  • the second opening operation is performed after the first opening operation.
  • the second opening operation is an operation of lifting the front window 22 along the guide rail 31 toward the rear of the vehicle.
  • the front window 22 moves to the opening position.
  • the pulling force of the assist cable 35 connected to the first link plate 40 is such that the upper roller 25A is located at the held position and is movable along the guide rail 31 together with the link roller 41. This acts directly on the first link plate 40. Therefore, the pulling force of the assist cable 35 assists the front window 22 to move smoothly in the opening direction without being dispersed.
  • the guide rail 31 according to this embodiment is bent in the middle corresponding to the shape of the cab body 21, and the posture of the first link plate 40 corresponds to the shape of the bent guide rail 31. Change. This change in posture may cause bending stress at the tip of the assist cable 35 when the assist cable 35 is completely fixed to the first link plate 40.
  • the coupling mechanism in this embodiment, the combination of the held shaft 36 and the holding portion 37, is the axis of the assist cable 35 around the left and right direction with respect to the first link plate 40 with the held shaft 36 as a fulcrum. The relative rotation of the assist cable 35 is allowed, thereby making it possible to reduce the bending stress applied to the tip of the assist cable 35.
  • the held shaft 36 and the holding portion 37 will be described.
  • the held shaft 36 is connected to the tip end portion of the assist cable 35 in a posture extending in the vehicle width direction, that is, the left-right direction orthogonal to the moving direction of the link side roller 41.
  • the outer peripheral surface of the held shaft 36 has a small coefficient of friction with respect to the holding portion 37, for example, the outer peripheral surface is constituted by a resin collar 36a.
  • the holding portion 37 is connected to the first link plate 40 so as to move integrally with the first link plate 40, and specifically to allow rotation around the central axis of the held shaft 36.
  • the held shaft 36 is held so as to allow the held shaft 36 to slide in the rotational circumferential direction with respect to the holding portion 37.
  • the holding portion 37 according to this embodiment is moved from the end of the first link plate 40 (the upper end of the first link plate 40 in the posture shown in FIGS. 6 and 7) to the left and right.
  • a support shaft 37 a extending outward in the direction and a holding portion main body 37 b formed at the end of the support shaft 37 are integrally provided. As shown in FIGS.
  • a partial cylinder in which a part of the outer peripheral surface of the held shaft 36 can be fitted into a portion of the outer peripheral surface of the holding portion main body 37 b facing the front side of the cab 20.
  • a part of the outer peripheral surface of the held shaft 36 is fitted in the concave portion 37c, and the outer peripheral surface of the held shaft 36 and the surface of the concave portion 37c, that is, the inner peripheral surface.
  • the held shaft 36 is held while allowing the holding portion 37 to rotate, ie, allowing the held shaft 36 to rotate about its own axis.
  • the holding portion main body 37b is formed with an insertion hole 37d and an insertion groove 37e.
  • the insertion hole 37d allows the assist cable 35 to pass from the held shaft 36 fitted in the concave portion 37c to the rear portion of the cab 20, and holds the held shaft as the held shaft 36 slides.
  • the assist cable 35 has a shape extending in the vertical direction so as to allow the assist cable 35 to swing in the vertical direction about the shaft 36.
  • the insertion groove 37e has a shape that allows the assist cable 35 to be inserted and set from outside in the lateral direction into the insertion hole 37d through the insertion groove 37e.
  • the first closing operation is an operation of pulling down the front window 22 to the retracted position shown in FIG. 6 against the tensile force of the assist cable 35.
  • the lower roller 25B is guided to a position where the lower end portion of the front window 22 is positioned at the closed position as shown in FIG.
  • the upper part of the front window 22 is pushed forward from the retracted position to the closed position, that is, a position where, for example, the window glass 24 of the front window 22 is in close contact with the seal member 29 (this implementation).
  • the closed position that is, a position where, for example, the window glass 24 of the front window 22 is in close contact with the seal member 29 (this implementation).
  • it is an operation of rotating the lower roller 25B around a fulcrum).
  • each locked portion 50 attached to the front window 22 is engaged with the striker 52 corresponding thereto, and the front window 22 is locked in the closed position.
  • the present invention is not limited to the embodiment described above.
  • the present invention includes the following aspects, for example.
  • the cross-sectional shape of the guide rail according to the present invention is not limited to the cross-sectional shape of the guide rail 31 according to the embodiment, that is, the shape having the bottom wall 31a and the pair of side walls 31b and 31c.
  • the right guide rail 31 does not require restriction of the movement of the assist cable 35, so
  • the part may not have the outer side wall 31b (the upper side wall in the horizontal part) of the pair of side walls 31b and 31c.
  • the portion of the guide rail 31 located near the closing position of the front window 22 the portion in the section L2 in FIG.
  • the upper and lower rollers 25A and 25B and the link roller 41 are preferably provided with the both side walls 31b and 31c so as to be reliably moved and moved along a predetermined guide path.
  • Such partial omission of the guide rail 31 enables reduction of the manufacturing cost and weight reduction of the guide rail 31 while reliably guiding the first link and the front window 22.
  • the window-side held body and the link-side held body according to the present invention are limited to those that move while rotating in the guide rail 31 like the upper and lower rollers 25A and 25B and the link-side roller 41 according to the embodiment.
  • the held body may be a member that slides relative to the guide rail without rotating within the guide rail.
  • the pair of lower rollers 25B may be omitted, or may be separated from the guide rail 31 when the front window 22 arrives.
  • the front window 22 may be moved to the closed position by a translational operation instead of reaching the closed position shown in FIG. 6 by turning around the lower roller 25B as in the above embodiment.
  • a cab for a construction machine that includes a front window and that can move smoothly between a closed position and an open position.
  • the cab is a front window that is movable between a cab body in which a front opening is formed, a closed position that closes the front opening, and an open position that opens the front opening, and is in the closed position.
  • a front window having a plurality of window-side holders including an upper-side holder to be positioned at an upper end of the front window; and disposed in the cab body, wherein the front window is formed between the closed position and the open position.
  • a guide rail that guides and holds the window-side held body so as to move between, an assist cable that biases the front window in an opening direction toward the opening position, connected to the assist cable, and A first link that is movable along the guide rail while being held by the guide rail, and rotates about a left-right axis perpendicular to the moving direction of the link-side moving body with respect to the front window and the first link.
  • a second link coupled so as to be possible, and the second link moves the upper held body by the rotation of the second link with respect to the front window and the first link.
  • the front window can be smoothly moved between the closed position and the open position. Specifically, even when the upper holding member included in the plurality of window-side holding members of the front window is in the disengaged position where the front window is disengaged from the guide rail so as to position the front window in the closed position. Is held by the guide rail, there is no need to disengage the front window from the closed position directly against the pulling force of the assist cable acting on the link as in the prior art. For example, by pulling the front window slightly forward from the closed position, the front window is retracted from the closed position (in some cases by its own weight) (that is, the upper support body of the front window is moved away from the detached position). It is also possible to move it to a held position).
  • the first link includes a link main body, and a plurality of link side supported bodies that are coupled to the link main body at a plurality of positions aligned along the guide path of the guide rail, and each of which is held by the guide rail. It is preferable to include.
  • Each of the plurality of link-side held bodies is held by the guide rail because the first link is smoothly moved along the guide rail by stabilizing the posture of the first link with respect to the guide rail. Enable. This allows a smooth movement of the front window between the closed position and the open position.
  • the link body includes a curved portion that is curved so as to prevent interference between the link body and the upper held body at the held position at a position between the plurality of link side held bodies. ,preferable.
  • the curved portion receives the upper held body moving to the held position between the plurality of link side held bodies while avoiding interference between the link main body and the upper held body.
  • the upper held body can be stably held on the guide rail at a position between the link side held bodies.
  • the first link includes a protruding portion that protrudes above the upper surface of the guide rail when the front window is in the closed position, and the assist cable is connected to the protruding portion and It is preferable that the wires are arranged along the upper surface. This makes it possible to use the guide rail as a support member for the assist cable, thereby reducing the number of parts and reducing the cost.
  • the guide rail includes a restricting portion that restricts the movement of the assist cable in the left-right direction.
  • the restricting portion prevents the assist cable from dropping from the guide rail due to swinging in the left-right direction.
  • the restriction part is preferably, for example, a part in which a specific part of the upper surface of the guide rail protrudes upward from the other part.
  • limiting part can suppress effectively the motion of the said guide rail in the left-right direction with a simple structure.
  • the cab further includes a coupling mechanism that couples the assist cable to the first link so that the assist cable can be rotated about a horizontal axis.
  • the rotation of the assist cable with respect to the first link suppresses bending stress generated at the tip of the assist cable due to a change in the posture of the first link when the front window moves in the opening and closing direction. This effectively suppresses damage to the assist cable.
  • the coupling mechanism is connected to the tip end portion of the assist cable, is connected to the held shaft extending in the left-right direction, and the first link, and holds the held shaft rotatably about its own axis. It is preferable that the holding portion has an insertion hole that allows the assist cable to rotate with respect to the first link accompanying the rotation of the held shaft.

Abstract

L'invention concerne une cabine (20) dans laquelle une fenêtre avant (22) est mobile en douceur entre une position fermée et une position ouverte. La cabine (20) comporte : un corps de cabine (21) dans lequel une ouverture avant (21a) est formée ; une fenêtre avant (22) mobile entre une position fermée et une position ouverte et ayant une pluralité de corps retenus côté fenêtre comprenant un corps supérieur retenu (25A) ; un rail de guidage (31) pour retenir les corps retenus côté fenêtre tout en guidant les corps retenus côté fenêtre ; une première liaison (40) reliée à un câble d'assistance (35) et se déplaçant tout en étant retenue par le rail de guidage (31) ; et une seconde liaison (45). La seconde liaison (45) relie la fenêtre avant (22) et la première liaison (40) de telle sorte que le corps supérieur retenu (25A) se déplace entre une position retenue et une position séparée dans laquelle le corps supérieur retenu (25A) est séparé du rail de guidage (31) de manière à positionner la fenêtre avant (22) en position fermée.
PCT/JP2017/012681 2016-07-14 2017-03-28 Cabine pour engin de construction WO2018012047A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018527388A JP6743890B2 (ja) 2016-07-14 2017-03-28 建設機械のキャブ

Applications Claiming Priority (2)

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JP2016139109 2016-07-14
JP2016-139109 2016-07-14

Publications (1)

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WO2018012047A1 true WO2018012047A1 (fr) 2018-01-18

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PCT/JP2017/012681 WO2018012047A1 (fr) 2016-07-14 2017-03-28 Cabine pour engin de construction

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JP (1) JP6743890B2 (fr)
WO (1) WO2018012047A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021050588A (ja) * 2019-09-26 2021-04-01 コベルコ建機株式会社 建設機械のキャブ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0872536A (ja) * 1994-09-08 1996-03-19 Nippon Cable Syst Inc 建設機械のためのフロントウインド開閉装置
JPH0924731A (ja) * 1995-07-14 1997-01-28 Nippon Cable Syst Inc 建設機械の前窓開閉装置およびそれに用いるロック機構
JPH11303496A (ja) * 1998-04-20 1999-11-02 Chuo Spring Co Ltd 窓の開閉装置
JP4062331B2 (ja) * 2005-11-16 2008-03-19 コベルコ建機株式会社 建設機械の前窓開閉装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0872536A (ja) * 1994-09-08 1996-03-19 Nippon Cable Syst Inc 建設機械のためのフロントウインド開閉装置
JPH0924731A (ja) * 1995-07-14 1997-01-28 Nippon Cable Syst Inc 建設機械の前窓開閉装置およびそれに用いるロック機構
JPH11303496A (ja) * 1998-04-20 1999-11-02 Chuo Spring Co Ltd 窓の開閉装置
JP4062331B2 (ja) * 2005-11-16 2008-03-19 コベルコ建機株式会社 建設機械の前窓開閉装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021050588A (ja) * 2019-09-26 2021-04-01 コベルコ建機株式会社 建設機械のキャブ
JP7238720B2 (ja) 2019-09-26 2023-03-14 コベルコ建機株式会社 建設機械のキャブ

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JP6743890B2 (ja) 2020-08-19
JPWO2018012047A1 (ja) 2019-05-16

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