JP5131749B2 - Door device for work machine - Google Patents

Description

The present invention relates to a door device for a work machine in which a latch mechanism is provided on a door panel.

  FIG. 12 shows a hydraulic excavator 10 as a work machine. An upper swing body 12 is turnably provided on a lower traveling body 11, and a cab 13, a work device 14, and a power device 15 such as an engine are mounted on the upper swing body 12. Is installed. The power unit 15 is covered with an upper cover 16, a side door 17, and the like. The upper cover 16 and the side door 17 are attached to a frame on the airframe side so as to be freely opened and closed by a hinge. These side doors 17 and the like are basically fixed in a closed state to a frame on the airframe side by a latch device 18 (see, for example, Patent Documents 1, 2, and 3).

  In the side door 17 of this type of work machine, a large vibration is also generated in the side door 17 due to an impact generated in the vehicle.

  Therefore, as shown in FIG. 12, the side door 17 is provided with a bracing component 19 for suppressing vertical vibration as a separate component from the latch device 18.

  That is, in the conventional latch device 18, the latch mechanism portion 18a attached to the side door 17 shown in FIG. 13 and the striker 18b attached to the frame on the airframe side shown in FIG. Since the latch device 18 does not have a vibration suppression function for suppressing vertical vibration due to the door load of the side door 17, as shown in FIG. 15, the vibration attached to the side door 17 is not provided. There is a vibration damping device that suppresses the vertical vibration of the side door 17 by fitting the stop part 19a with the vertical vibration regulating body 19b attached to the frame on the machine body side.

  As a means for suppressing such vertical vibration, the overlapping portion of the two doors is prevented from shaking at the same time (for example, refer to Patent Document 1), or the door side stopper member is fitted to the frame body side stopper receiver. Some of them are combined (see, for example, Patent Document 3).

Moreover, there exists a thing which makes the plunger projected from the frame side and the receiving member on the door side engage as a damping device for suppressing a vertical vibration. Many of these vibration control devices are installed when the vehicle class increases and the impact increases.
JP 2001-262618 A (page 3-4, FIG. 2-4) JP 2007-137183 A (page 3, FIG. 3-5) JP 2007-170114 A (page 5-8, FIG. 2-7)

  A vibration damping device that suppresses vibrations requires a strong mounting method such as welding or bolt fixing, and is difficult to fix with an adhesive or the like. In particular, in a double-structure door, the plate itself is thin, welding and fixing methods are limited, and the number of vibration damping devices is limited. Furthermore, in a large machine that generates large vibrations, a plurality of vibration control devices are required, but there is a problem that the layout is restricted at that time. Furthermore, it is necessary to mount a plurality of vibration control structures on the frame side which is a receiving member of the door.

This invention is made in view of such a point, and it aims at providing the door apparatus for working machines which can reduce the damping device for suppressing the vibration of a door panel.

According to a first aspect of the present invention, there is provided a door panel that can be freely opened and closed with respect to a frame of a work machine, an engagement body that protrudes from the frame toward the opening and closing portion of the door panel, and a door panel that is provided on the door panel. And a latch mechanism that can be disengaged to restrict the movement of the door panel in the opening and closing direction, and the engagement body bulges from the mounting board to the latching mechanism. The upper and lower anti-vibration inclined surface portions that are formed and are in surface contact with the latch mechanism portion on the inclined surfaces and are engaged in the vertical direction, and project from the anti-vibration inclined surface portions and inserted into the latch mechanism portion. It is a door device for work machines provided with the hook metal fitting latched by.

According to a second aspect of the present invention, the mounting substrate portion and the upper and lower anti-vibration slope portions of the work machine door device according to the first aspect are press-molded from a single sheet metal.

  According to the first aspect of the present invention, the engaging body of the frame and the latch mechanism portion on the door panel side engage with each other to restrict the movement of the door panel in the opening / closing direction. The anti-vibration slope portion for suppressing the vertical vibration due to the door load can be integrated in a compact manner, and the number of vibration control devices mounted on the frame side can be reduced.

  According to the invention described in claim 2, the upper and lower anti-vibration slope portions can be easily formed together with the mounting substrate portion.

  Hereinafter, the present invention will be described in detail with reference to one embodiment shown in FIGS.

  FIG. 11 shows a hydraulic excavator 10 as a working machine. An upper swing body 12 is turnably provided on a lower traveling body 11, and a cab 13, a work device 14, and a power device 15 such as an engine are mounted on the upper swing body 12. Is installed. The power unit 15 is covered with an upper cover 16, a side door 17, and the like.

  6 to 8 show a door panel 20 of the side door 17, and the door panel 20 is formed by pressing an outer plate 21 and a sheet metal thinner than the outer plate 21 into an uneven shape, and forming a recess on the inner surface of the outer plate 21. An inner plate 23 that fixes and forms a space between the convex portion and the outer plate 21 and a foam material 24 filled in the space between the outer plate 21 and the inner plate 23 are provided.

  As shown in FIG. 6, the outer plate 21 has a honeycomb-shaped vent hole assembly portion in which a plurality of vent holes 25 formed in a regular hexagon are gathered in a honeycomb shape via a joint portion of each side of the vent holes 25. A plurality of sets 26 are provided by drilling.

  As shown in FIG. 8, the inner side plate 23 is formed in a concave shape and joined portions 27 and 28 as concave portions joined to the outer side plate 21, and convex portions formed by bulging with respect to the joined portions 27 and 28. Part 29.

  The joint portions 27 of the inner plate 23 are formed in three rows in the horizontal direction corresponding to the honeycomb-like vent hole assembly portions 26 of the outer plate 21, and the honeycomb-like vent hole assembly portions of the outer plate 21 are formed in these joint portions 27. Ventilation openings 30 larger than 26 are provided by drilling.

  That is, a plurality of sets of ventilation openings 30 opened on the honeycomb-shaped ventilation hole assembly portion 26 of the outer side plate 21 and the joining portion 27 as the concave portion of the inner side plate 23 are provided in one-to-one correspondence. The ventilation opening 30 of the inner plate 23 is formed to be slightly larger than the honeycomb-shaped ventilation hole assembly 26 of the outer plate 21.

  The peripheral portion of the outer plate 21 includes a hemming portion 33 that is hemmed so as to be folded and crushed so as to wrap around the peripheral portion of the inner plate 23.

  At least the peripheral edge portion of the inner plate 23 is bonded to the outer plate 21 with an adhesive, and the outer plate 21 and the inner plate 23 are joined and sealed with this adhesive. The adhesive is preferably a paste-type structural adhesive having viscosity and thermosetting properties.

  An inner reinforcing plate (not shown) bonded to the outer plate 21 is provided in one side of the inner plate 23, and the hinge 36 is connected to the inner reinforcing plate through hinge mounting windows 34 and 35 opened in the inner plate 23. 37 are attached by welding.

  As shown in FIG. 5, the hinges 36 and 37 attach one side portion of the door panel 20 of the side door 17 to the one side member 41a of the frame 41 on the machine body side of the excavator so as to be freely opened and closed. On the opposite side of the door panel 20 from the hinges 36 and 37, a latch mechanism 43 of the latch device 42 is provided. On the other hand, as the door panel 20 opens and closes, the latch device 42 is engaged with the opening / closing part side of the door panel 20 via the mounting plate 44a from the other side member 41b of the frame 41 on the airframe side so as to face the direction in which the door panel 20 abuts. A striker 44 as a unit is protruded, and a latch mechanism 43 provided on the door panel 20 side can be engaged with and disengaged from the striker 44. The latch mechanism portion 43 engages with the striker 44 to restrict the movement of the door panel 20 in the opening / closing direction and the up / down direction, and can be disengaged as described later.

  As shown in FIG. 1 and FIG. 2, the striker 44 has a pair of upper and lower mounting substrate portions 45 fixed to the frame 41 on the airframe side, and a V-shape from these mounting substrate portions 45 to the latch mechanism portion 43 side. The upper and lower anti-vibration slope portions 46 as one anti-vibration engaging portion that is formed in a bulge shape and is engaged with the latch mechanism portion 43 in the vertical direction, and protrudes from the tip flat portion 47 between the anti-vibration slope portions 46. And a hook fitting 48 as a locking portion formed in a U-shape by a round cross-section member that is provided, inserted into the latch mechanism portion 43, and locked by the latch mechanism portion 43.

  The upper and lower mounting substrate portions 45, the upper and lower anti-vibration slope portions 46, and the tip flat portion 47 are press-formed from a single sheet metal.

  As shown in FIG. 4, elongated holes 49 that are elongated in the vertical direction are provided in each mounting substrate portion 45 of the striker 44, and inserted into these elongated holes 49 as shown in FIG. 1. The striker 44 is attached to the frame 41 on the airframe side by the bolt 50. At that time, the vertical position of the striker 44 can be adjusted within the range of the long hole 49.

  As shown in FIGS. 1 to 3, the latch mechanism portion 43 is attached to a mounting plate 51 attached to the door panel 20 with a pair of body plates 52 a and 52 b constituting the mechanism body portion 52 by bolts 53 and nuts 54, respectively. The main body plates 52a and 52b of the mechanism main body 52 are respectively formed with U-shaped latch groove portions 55 that are fitted to the hook metal fittings 48 of the striker 44, and the other side of each of the latch groove portions 55 is open on the other side. A plurality of anti-vibration restricting portions 56 as anti-vibration engaging portions are integrally formed in a V shape. These anti-vibration restricting portions 56 are formed by bending a part of the main body plates 52a and 52b located on the opening side of the latch groove portion 55 outward.

  The plurality of anti-vibration slope portions 46 of the striker 44 and the plurality of anti-vibration restriction portions 56 of the latch mechanism portion 43 are respectively arranged above and below, and the upper and lower anti-vibration restriction portions 56 are the upper and lower anti-vibration slope portions 46 of the striker 44. And the vibration in the vertical direction of the mechanism main body 52 caused by the door load is suppressed.

  As shown in FIG. 3, the mounting plate 51 is provided with an operation plate storage portion 57. Inside the operation plate storage portion 57, as shown in FIG. It is attached rotatably by 59.

  As shown in FIG. 3, the latch mechanism portion 43 includes a latch plate 61 pivotally supported between one side portions of a pair of body plates 52a and 52b of the mechanism body portion 52, and a pair of body portions. And a lock body 62 pivotally supported between the other side portions of the plates 52a and 52b.

  The latch plate 61 has a receiving groove 63 for receiving the hook metal fitting 48 when the hook metal fitting 48 of the striker 44 is inserted into the latch groove 55 as shown in FIG. Although it is urged by a spring 64 at an angle opened to the opening side and is locked by a stopper 65, the receiving groove 63 can be closed by rotating according to the insertion operation of the hook metal fitting 48.

  The lock body 62 is urged by a spring 66 around the peripheral surface of the latch plate 61 to lock the latch plate 61 having an angle with the receiving groove 63 closed. The locking of the lock body 62 is released by an engagement release body 67 that is interlocked with the rotation of the operation plate 58. The disengaging operation of the disengaging body 67 is restricted by the locking device 68 installed adjacent thereto. The attachment plate 51 of the latch mechanism 43 is attached to the door panel 20 by a rivet 69.

  As shown in FIG. 5, a vibration damping device 70 is provided on the upper side of the latch device 42. That is, a concave joint portion 28 is provided on the opposite side of the door panel 20 from the hinges 36 and 37, and on the other hand, the other side member 41b of the fuselage-side frame 41 faces the joint portion 28 and is engaged with the convex portion. The plunger 71 is provided by the mounting plate 72, and the plunger 71 is inserted into and engaged with the joint portion 28 when the door is closed, whereby the vibration damping device 70 that suppresses the vertical vibration of the door panel 20 is configured.

  Next, the function and effect of this embodiment will be described.

  As shown in FIG. 5, when the door panel 20 of the side door 17 attached to the frame 41 on one side of the airframe by the hinges 36 and 37 so as to be opened and closed is closed toward the frame 41 on the other side of the airframe. 9, the latch mechanism 43 of the door panel 20 moves toward the striker 44 attached to the frame 41 on the airframe side by the bolt 50 and the nut 50a, and the latch provided in the mechanism main body 52 The hook metal 48 of the striker 44 is inserted into the groove 55 as shown in FIG.

  At that time, the receiving groove 63 of the latch plate 61 is pressed by the hook metal fitting 48 of the striker 44, and the latch plate 61 rotates as shown in FIG. 10, and the hook metal fitting 48 of the striker 44 is restrained and locked.

  At this time, the upper and lower anti-vibration restricting portions 56 provided integrally with the mechanism main body portion 52 of the latch mechanism portion 43 and the upper and lower anti-vibration slope portions 46 provided integrally with the striker 44 are engaged with each other. The door panel 20 of the door 17 is restricted so as not to cause vertical vibration due to door load.

  Therefore, as shown in FIG. 7, the foamed material 24 filled between the inner plate 23 that is formed thin and can be reduced in weight and the outer plate 21 that is formed thick and can secure the strength against impact from the outside, The sound generated from the door panel 20 can be attenuated to reduce the noise, and the vertical vibration between the latch mechanism 43 and the striker 44 can be reduced by the vertical rocking slope 46 and the vertical vibration. By restricting by engagement with the stop restricting portion 56, generation of vibration noise from the door panel 20 can be suppressed and noise reduction can be achieved.

  The striker 44 of the frame 41 on the fuselage side and the latch mechanism 43 of the door panel 20 are engaged with each other to restrict the movement of the door panel 20 in the opening / closing direction, but the movement of the door panel 20 in the vertical direction intersecting with the opening / closing direction of the door panel 20 is restricted. Since the plurality of anti-vibration slope portions 46 and the anti-vibration restriction portions 56 that engage with the anti-vibration slope portions 46 are also integrally provided, the door panel 20 is attached to the latch device 42 that restricts the movement of the door panel 20 in the opening / closing direction Therefore, it is possible to integrate the anti-vibration parts for suppressing the vibration in the direction crossing the opening / closing direction of the, thereby reducing the number of parts and facilitating the creation of the part layout.

  In particular, the striker 44 attached to the frame 41 on the fuselage side protrudes from a plurality of anti-vibration slope portions 46 bulging from the attachment substrate portion 45 to the latch mechanism portion 43 side, and between these anti-vibration slope portions 46. And the hook mechanism 48 inserted into the latch mechanism part 43, and the latch mechanism part 43 on the door panel 20 side includes a mechanism main body part 52 in which a latch groove part 55 that fits into the hook metal part 48 of the striker 44 is cut and formed. The mechanism main body 52 includes a plurality of anti-vibration regulating portions 56 that are integrally formed on the opening side of the latch groove portion 55 of the mechanism main body 52 and are in close contact with the plurality of anti-vibration slope portions 46 of the striker 44 to suppress the vibration of the mechanism main body 52. Therefore, the latching device for suppressing the vibration of the door panel 20 can be integrated into the latch device 42 in a compact manner.

  By receiving the door load by the plurality of anti-vibration slope portions 46 and the plurality of anti-vibration restricting portions 56 arranged above and below, it is possible to reliably suppress the vertical vibration of the door panel 20 due to the door load.

  By forming an anti-vibration restricting portion 56 in the shape of a V-shape on the opening side of the latch groove portion 55 that is cut and formed in a U-shape in the mechanism main body 52, the hook metal fitting 48 of the striker 44 is operated by the guide action of the anti-vibration restricting portion 56. The door panel 20 can be reliably prevented from vibrating by being securely inserted into the latch groove 55 of the main body 52 and suppressing the anti-slope surface 46 of the striker 44 by the V-shaped anti-vibration restricting portion 56.

  In addition to the vibration damping device 70 directly attached to the door panel 20, the door panel 20 itself has a structure including a vibration damping device including an upper and lower vibration inclined slope portion 46 and a vibration regulating restriction portion 56 in the opening / closing latch device 42. It is possible to reduce the number of vibration control devices 70 to be mounted on.

  Further, the portions 48 and 61 for restricting the movement of the door panel 20 in the opening / closing direction and the portions 46 and 56 for restricting the movement in the vertical direction can be integrated in a compact manner, and manufacturing can be facilitated.

  Furthermore, the striker 44 can be compactly integrated with an anti-vibration slope portion 46 for suppressing vertical vibration caused by the door load of the latch mechanism portion 43, and the number of damping devices 70 mounted on the frame 41 side can be reduced. be able to.

  Further, since the mounting substrate portion 45 and the upper and lower anti-vibration slope portions 46 are press-molded from a single sheet metal, the upper and lower anti-vibration slope portions 46 can be easily formed together with the attachment substrate portion 45.

  The present invention can be used for a side door and a rear door of a working machine such as a hydraulic excavator.

It is a perspective view which shows one Embodiment of the latch apparatus provided in the door apparatus which concerns on this invention. It is a perspective view which shows the combined state of a latch apparatus same as the above. It is a perspective view which shows the latch mechanism part of a latch apparatus same as the above. It is a perspective view which shows the striker as an engaging body of a latch apparatus same as the above. It is a perspective view which shows the mounting state of a latch apparatus same as the above. It is an external view of the door panel with which the latch mechanism part of the latch apparatus same as the above was mounted | worn. It is the VII-VII sectional view taken on the line of FIG. It is a perspective view of the inner surface side of the door panel to which the latch mechanism part of the latch device is mounted. It is a side view which shows the state before the coupling | bonding of a latch apparatus same as the above. It is a side view which shows the state after the coupling | bonding of a latch apparatus same as the above. It is a top view of the working machine provided with the door device concerning the present invention. It is a perspective view of the working machine provided with the conventional door apparatus. It is a perspective view which shows the latch mechanism part provided in the conventional door apparatus. It is a perspective view which shows the striker provided in the conventional door apparatus. It is a perspective view which shows the vertical vibration control means provided in the conventional door apparatus.

Explanation of symbols

20 Door panel
41 frames
43 Latch mechanism
44 Strike as engaging body
45 Mounting board
46 Damping slope
48 Hook bracket

Claims (2)

A door panel that can be freely opened and closed with respect to the frame of the work machine ;
An engagement body protruding from the frame to the door panel opening and closing side;
A latch mechanism that is provided on the door panel and engages with the engagement body to restrict the movement of the door panel in the opening and closing direction;
The engaging body is
A mounting board portion fixed to the frame;
An upper and lower anti-vibration slope part which is bulged from the mounting substrate part to the latch mechanism part side and is in surface contact with the latch mechanism part on the slope surface and engaged in the vertical direction;
A door device for a work machine, comprising: a hook metal fitting protruding from between these anti-vibration slope portions and inserted into the latch mechanism portion and locked by the latch mechanism portion. The work machine door device according to claim 1, wherein the mounting substrate portion and the upper and lower anti-vibration slope portions are press-formed from a single sheet metal.

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