JP2009108619A - Door device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door device capable of surely suppressing vibrations in the vertical direction of a door panel to a frame. <P>SOLUTION: One side section of the door panel 20 is fitted in an openable and closeable manner to one side member 41a of the frame 41 on the machine body side by hinges 36 and 37. A first vibration-control recessed section 71 is formed to the internal side plate 23 of a vertical surface section 20a in the other side section of the door panel 20 while a second vibration-control recessed section 72 is formed to the internal plate 23 of a curved surface section 20b in an upper section in the other side section of the door panel 20 to one side section of the door panel 20. A first vibration-control plunger 73 freely engaged and disengaged to and from the first vibration-control recessed section 71 and a second vibration-control plunger 74 freely engaged and disengaged to and from the second vibration-control recessed section 72 with the opening and closing of the door panel 20 are fitted to the other side member 41b of the frame 41 on the machine body side respectively. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

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

  FIG. 15 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 the airframe side frame by a hinge so as to be freely opened and closed. These side doors 17 and the like are basically fixed in a closed state to the machine body side frame by a latch device 18 (see, for example, Patent Documents 1, 2, and 3).

  An anti-vibration component 19 for suppressing vertical vibration is attached to the side door 17, and as shown in FIG. 16, the anti-vibration component 19 is engaged with an up-and-down vibration restricting body 19a attached to the machine body side frame. Thus, the vertical vibration of the side door 17 is suppressed.

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

  The side door type door panel shown in Patent Literatures 1 and 3 is a folded curved surface bent upward on the frame side with respect to a vertical surface portion that is attached to the fuselage side frame by a hinge on one side so as to be opened and closed in the horizontal direction. A portion is formed, and means for suppressing vertical vibration is provided only in the vertical surface portion, but there is no means for suppressing vibration in the upper folded curved surface portion. Since the upper folded surface is a free end, it tends to vibrate.

  In order to prevent this vibration, for example, even if a stopper installed on the fuselage-side frame is brought into contact with the upper folding surface when the door is closed, sufficient friction to suppress the vertical vibration of the door panel cannot be obtained. The vibration in the vertical direction cannot be reliably suppressed.

  This invention is made in view of such a point, and it aims at providing the door apparatus which can suppress the vibration of the up-down direction of a door panel reliably with respect to a flame | frame.

  According to the first aspect of the present invention, there is provided a door panel including a frame and a vertical surface portion that is attached to the frame by a hinge on one side so as to be freely opened and closed in the horizontal direction, and an upper portion is bent toward the frame side to form a folded curved surface portion. And a latch device capable of engaging and disengaging the vertical surface portion to the frame side on the other side opposite to the hinge of the door panel, and a first vibration control provided inside the vertical surface portion on the other side portion of the door panel A second vibration damping engagement portion provided inside the folding surface portion at the other side portion of the door panel, and a first vibration damping engagement portion provided on the frame side as the door panel is opened and closed. A first vibration damping body that can be engaged and disengaged, a second vibration damping engagement part that is provided on the frame side and that can be freely engaged and disengaged as the door panel opens and closes, The vibration damping engagement portion and the first vibration damping body are engaged in the vertical direction and the second vibration damping body. Engaging portion and the second damping member is a configuration of a door system which engages in the vertical direction.

  The invention described in claim 2 is such that the door panel in the door device according to claim 1 is thinner than the outer plate, which is fixed to the inner surface of the outer plate and the outer plate and forms a space between the outer plate. A thick inner plate and a foam filled in a space between the outer plate and the inner plate, and the first damping engagement portion and the second damping engagement portion are formed on the inner plate. It is a door device of the composition.

  According to a third aspect of the present invention, the first vibration-damping engagement portion in the door device according to the second aspect is a concave portion formed on the inner plate of the vertical surface portion in a closed state around the second vibration-damping portion. The engaging part is a concave part opened on one side formed on the inner plate of the folded curved surface part.

  According to a fourth aspect of the present invention, the first vibration-damping engagement portion in the door device according to the second aspect is a recess that is formed on the inner plate of the vertical surface portion and is in a closed state on the entire periphery. The engaging portion is a slope portion formed on the inner plate at the corner of the folded curved surface portion.

  According to the first aspect of the present invention, in the door panel in which the upper surface is bent to the frame side with respect to the vertical surface portion that is attached to the frame so as to be openable and closable in the horizontal direction by the hinge on one side portion. The first vibration damping engagement portion provided on the vertical surface portion on the other side portion of the door panel and the first vibration damping body provided on the frame side are engaged in the vertical direction and the other side portion of the door panel Since the second vibration damping engagement portion provided on the folded curved surface portion and the second vibration damping body provided on the frame side engage in the vertical direction, the first vibration damping engagement portion and the first vibration damping engagement portion The vertical vibration of the vertical surface portion of the door panel can be suppressed by the first vibration damping body, and the vertical vibration of the folded curved surface portion of the door panel can be suppressed by the second vibration damping engagement portion and the second vibration damping body. The vibration in the vertical direction can be reliably suppressed

  According to the invention described in claim 2, the weight can be reduced by the hollow closed cross-sectional structure formed by the outer plate and the inner plate thinner than the outer plate, and the inner plate and the outer plate thicker than the inner plate. The hollow closed cross-section structure with a sufficient height formed by and can provide a robust door panel that can secure sufficient strength against impact from the outside at a low cost. The generated sound can be effectively attenuated, that is, it has a high sound attenuation effect, and is provided on the frame side with the first vibration damping engagement portion and the second vibration damping engagement portion formed on the inner plate. The noise can be effectively reduced by the synergistic effect with the vibration damping effect by the engagement between the first vibration damping body and the second vibration damping body.

  According to the invention described in claim 3, the first vibration damping engagement portion is a concave portion formed in the vertical surface portion of the inner plate in a closed state on the entire circumference, and the second vibration damping engagement portion is Since it is a recessed portion opened on one side at the folded curved surface portion of the inner plate, the vibration of the door panel can be reliably suppressed by the engagement between the two vibration damping engagement portions and the corresponding two vibration damping bodies, In particular, one side of the concave portion of the second vibration-damping engagement portion is opened even in the case of a curved surface portion in which the vertical surface portion of the inner plate is not easily formed by press and less stretched, so that a sufficient depression cannot be formed. Thus, a recess having a depth capable of engaging with the second vibration damping body can be drawn, and necessary friction can be obtained even when the second vibration damping engagement portion is engaged with the second vibration damping body. The vibration of the door panel can be reliably suppressed.

  According to the invention described in claim 4, the first vibration damping engagement portion is a concave portion in a closed state in which the inner plate is formed in the vertical surface portion, and the second vibration damping engagement portion is Since it is a slope formed at the corner of the inner plate in the folded curved surface, the vertical vibration of the door panel can be reliably suppressed by sandwiching the two vibration suppression engagement portions with the two corresponding vibration suppression bodies. Since the second vibration-damping engagement portion is a slope portion, the vertical surface portion of the inner plate is not easy to press-mold and has little elongation. The damping engagement portion can be easily press-molded.

  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 work machine, and 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 placed 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.

  4 to 6 show a door panel 20 of the side door 17, which is formed by pressing an outer plate 21 and a sheet metal having a thickness smaller than that of the outer plate 21 into an uneven shape. An inner plate 23 that fixes a concave portion to the outer plate 21 and forms a space 22 between the convex portion and the outer plate 21, and a foam material 24 filled in the space 22 between the outer plate 21 and the inner plate 23. It has.

  As shown in FIGS. 5 and 6, the inner plate 23 includes concave portions 27 and 28 that are formed in a concave shape and joined to the outer plate 21, and convex portions 29 that are bulged and formed with respect to the concave portions 27 and 28. It is equipped with.

  The concave portion 27 is a portion that is bonded to the outer plate 21 by an adhesive. In the concave portion 27, a vertical reinforcing convex portion 31 that also serves as an adhesive reservoir is provided, and a lateral convex portion 29 is provided. Is provided with a convex portion 32 for reinforcement.

  As shown in FIG. 6, 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. As shown in FIG. 5, hinge mounting windows 34 and 35 opened in the inner plate 23 are provided. The hinges 36 and 37 are attached to the internal reinforcing plate by welding or the like.

  As shown in FIG. 1, a frame 41 on the airframe side is mounted on the upper swing body 12 of the excavator, and one side member 41a of this frame 41 is connected to one side of the door panel 20 of the side door 17 by hinges 36 and 37. The side part is attached so that horizontal opening and closing is possible. The door panel 20 has an upper surface bent toward the frame 41 with respect to the vertical surface portion 20a to form a folded curved surface portion 20b.

  On the other side of the door panel 20 opposite to the hinges 36 and 37, a latch mechanism portion 43 of a latch device 42 capable of engaging and disengaging the vertical surface portion 20a to the frame 41 side is provided. On the other hand, as the door panel 20 is opened and closed, a striker 44 as an engaging body of the latch device 42 is protruded from the mounting plate 44a fixed to the other side member 41b of the frame 41 so as to face the direction in which the door panel 20 contacts. A latch mechanism 43 provided on the door panel 20 side with respect to the striker 44 can be engaged and disengaged.

  As shown in FIGS. 7, 9, and 10, the striker 44 includes a pair of upper and lower mounting board portions 45 fixed to the mounting plate 44 a on the frame 41 side, and a latch mechanism portion 43 from these mounting board portions 45. A plurality of anti-vibration inclined surface portions 46 as one anti-vibration engaging portion bulging and formed in a V-shape on the side, and a latch mechanism portion 43 protruding from the tip flat surface portion 47 between the anti-vibration inclined surface portions 46 And a hook fitting 48 as a locking portion formed into a U-shape by a round cross-section member inserted into the hook.

  Each mounting board portion 45 of the striker 44 is provided with elongated holes that are elongated in the vertical direction, and bolts 50 inserted into these elongated holes as shown in FIG. The striker 44 is attached to the attachment plate 44a on the frame 41 side by tightening with the combined nut 50a. At that time, the vertical position of the striker 44 can be adjusted within the range of the long hole.

  As shown in FIGS. 7 to 9, the latch mechanism portion 43 is attached to a mounting plate 51 attached to the door panel 20 by a pair of body plates 52a and 52b 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 of the mechanism main body 52 in the vertical direction is suppressed.

  An operation plate storage portion 57 is provided on the mounting plate 51, and an engagement release operation plate 58 is rotatably attached to the inside of the operation plate storage portion 57 by a shaft 59 as shown in FIG. It has been.

  The latch mechanism 43 includes a latch plate 61 pivotally supported between one side of the pair of body plates 52a and 52b of the mechanism body 52, and the other side of the pair of body plates 52a and 52b. There is provided a lock body 62 pivotally supported between them.

  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 portion 55 as shown in FIGS. 9 to 10, and the receiving groove 63 is latched. 8 is urged by a spring 64 shown in FIG. 8 and locked by a stopper 65 at an angle opened to the opening side of the groove 55, and the receiving groove is rotated by rotating the hook metal fitting 48. 63 can be closed.

  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. 1, a vertical surface portion 20a on one side portion of a door panel 20 is attached to one side member 41a of a frame 41 on the fuselage side by hinges 36 and 37 so that the door panel 20 can be opened and closed. In the other side of the door panel 20, a first damping recess 71 as a first damping engaging portion is provided in the inner plate 23 of the vertical surface portion 20a, and an upper folded curved surface is provided on the other side of the door panel 20. The inner plate 23 of the portion 20b is provided with a second damping recess 72 as a second damping engaging portion.

  On the other hand, on the other side member 41b of the machine body side frame 41, a first damping plunger 73 as a first damping body detachable from the first damping recess 71 in accordance with opening and closing of the door panel 20, As the door panel 20 is opened and closed, a second damping recess 72 and a second damping plunger 74 as a second damping member that can be freely engaged and disengaged are provided.

  The first damping plunger 73 is attached via an L-shaped attachment plate 75 fixed to the middle part of the other side member 41 b of the frame 41, and the second damping plunger 74 is attached to the other side member of the frame 41. It is attached via an L-shaped attachment plate 76 fixed to the upper part of 41b.

  As shown in FIG. 2, the first vibration-damping recess 71 is in a closed state formed on the convex portion 29 of the inner plate 23 in the vertical surface portion 20 a formed below the bent portion 20 c of the door panel 20. And a taper 71a that expands from the plane of FIG. 2 toward the front. The second vibration-damping recess 72 is a notch 77 in which one side formed in the convex portion 29 of the inner plate 23 in the bent surface portion 20b formed above the bent portion 20c of the door panel 20 is opened. A taper 72a that expands from the plane of FIG. 2 toward the front is provided over the entire circumference excluding the notch 77.

  As shown in FIG. 3, the first damping recess 71 and the first damping plunger 73 have engaging portions 78a and 78b that engage in the vertical direction, as well as the second damping recess 72 and the first damping plunger 73. The second damping plunger 74 has engaging portions 79a and 79b that engage in the vertical direction.

  The mounting plate 75 of the first damping plunger 73 is fixed to the middle step of the other side member 41b of the frame 41 with a bolt 81, and the first damping plunger 73 is screwed with a nut 82 fixed to the mounting plate 75. Since it is attached to the screw shaft 83 to be mated and is fastened by another nut 84 that is screwed with the screw shaft 83, the first shaft can be adjusted by loosening the nut 84 and adjusting the screwing position of the screw shaft 83. The insertion depth of the damping plunger 73 with respect to the damping recess 71 can be adjusted.

  Similarly, the mounting plate 76 of the second damping plunger 74 is fixed to the upper portion of the other side member 41b of the frame 41 by a bolt 85, and the second damping plunger 74 is a nut 86 fixed to the mounting plate 76. And is fastened by another nut 88 that is screwed with the screw shaft 87. By adjusting the screwing position of the screw shaft 87 by loosening this nut 88, The insertion depth of the damping plunger 74 with respect to the second damping recess 72 can be adjusted.

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

  As shown in FIG. 1, 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 portion 43 of the door panel 20 moves toward the striker 44 on the frame 41 side, and the latch groove portion 55 provided in the mechanism main body portion 52 moves into the latch groove portion 55 as shown in FIG. 10. The hook metal fitting 48 of the striker 44 is inserted.

  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 regulating 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, and the side door is engaged. The 17 door panels 20 are regulated so as not to cause vertical vibrations.

  The upper panel is bent to the frame 41 side with respect to the vertical surface portion 20a attached to the frame 41 on the airframe side by the hinges 36, 37 on one side so as to be opened and closed in the horizontal direction. As shown in FIG. 3, the first damping recess 73 provided on the vertical surface portion 20a on the other side of the door panel 20 and the first damping plunger 73 provided on the frame 41 side on the machine body side are as follows. The second vibration-suppressing concave portion 72 provided on the folding surface portion 20b on the other side of the door panel 20 and the second vibration-suppressing plunger 74 provided on the frame 41 side on the machine body side are engaged with each other in the vertical direction. Are engaged in the vertical direction, so that the vertical vibration of the vertical surface portion 20a of the door panel 20 can be suppressed by the first vibration damping recess 71 and the first vibration damping plunger 73, and the second vibration damping concave 72 and the second vibration damping can be suppressed. The bent curved surface portion 20b of the door panel 20 by the vibration damping plunger 74 of Since the vertical vibration can be suppressed, it can be reliably suppress the vibration in the vertical direction of the door panel 20 to the frame 41 of the machine body.

  The hollow closed cross-section structure formed by the outer plate 21 and the inner plate 23 thinner than the outer plate 21 can reduce the weight, and the inner plate 23 and the thicker outer plate 21 can be sufficiently formed. A hollow closed cross-section structure with a height can provide a low-cost, robust door panel 20 that can secure sufficient strength against impact from the outside, and is filled between the inner plate 23 and the outer plate 21. The sound generated from the door panel 20 itself can be effectively attenuated by the foamed material 24, that is, the sound damping effect is high, and the first damping recess 71 and second The low-noise effect is effectively reduced by the synergistic effect of the vibration-suppressing recess 72 and the vibration-suppressing effect produced by the engagement of the first vibration-suppressing plunger 73 and the second vibration-suppressing plunger 74 provided on the frame 41 on the airframe side. Can be achieved.

  The first vibration-damping concave portion 71 is a concave portion formed on the vertical surface portion 20a of the inner plate 23 in a closed state, and the second vibration-damping concave portion 72 is located on one side of the folding surface portion 20b of the inner plate 23. Since the concave portion is open, the vibration of the door panel 20 can be reliably suppressed by the engagement of the two vibration damping engagement portions and the corresponding two vibration damping bodies, and in particular, the vertical surface portion 20a of the inner plate 23 Even if the bent curved surface portion 20b is not easily formed by press molding and has little elongation, it is difficult to make a sufficient dent. By opening one side of the concave portion in the second vibration suppressing concave portion 72, the second damping A recess having a depth capable of engaging with the vibration plunger 74 can be drawn, and necessary friction can be obtained even when the second vibration suppression recess 72 and the second vibration suppression plunger 74 are engaged, and vibration of the door panel 20 can be obtained. Can be reliably suppressed.

  Next, FIG. 12 shows another embodiment, in which the first vibration-damping engagement portion is a vibration-damping recess 71 that is formed on the inner plate 23 in the vertical surface portion 20a and is closed on the entire circumference. This vibration-damping engagement portion is a slope portion 91 formed on the inner plate 23 at the corner of the folded curved surface portion 20b. The slope portion 91 is formed in a state where the corner portion of the convex portion 29 is cut off obliquely.

  A damping plunger (not shown) serving as a first damping body is inserted into the damping recess 71, and an engaging plate (not shown) serving as a second damping body is inserted into the inclined surface portion 91. Are engaged. The engagement plate is a steel plate or the like installed obliquely on the other side member 41b of the frame 41 in accordance with the shape of the slope portion 91, and the damping recess 71 and the slope surface are formed by these damping plungers and the engagement plate. The vertical vibration of the door panel 20 is suppressed by pressing the portion 91 so as to sandwich it.

  According to this embodiment, the first vibration-damping engagement portion is the vibration-damping concave portion 71 formed on the vertical surface portion 20a of the inner plate 23 in the entire circumference closed state, and the second vibration-damping engagement portion is In addition, since it is the slope portion 91 formed at the corner portion of the inner plate 23 in the folded curved surface portion 20b, the vibration control recess 71 and the slope portion 91 are sandwiched between the two corresponding vibration control bodies. The vertical vibration can be reliably suppressed, and the second vibration-damping engagement portion is the slope portion 91. Therefore, the vertical surface portion 20a of the inner plate 23 is not easily formed by press and is not easily stretched. Even with the bent surface portion 20b, the vibration-damping engagement portion can be easily press-formed.

  Next, FIG. 13 and FIG. 14 show still another embodiment.

  As shown in FIG. 13, the outer plate 21 has a honeycomb-shaped vent hole assembly portion 96 in which a plurality of vent holes 95 formed in a regular hexagon are gathered in a honeycomb shape through a joint portion of each side of the vent hole. However, a plurality of sets are provided by drilling.

  The recesses 27 of the inner plate 23 are formed in three rows in the lateral direction corresponding to the honeycomb-like vent hole assembly portions 96 of the outer plate 21, and these recesses 27 are formed by the honeycomb-like vent hole assembly portions 96 of the outer plate 21. Large ventilation openings 97 are provided by drilling.

  That is, a plurality of sets of one-to-one correspondences are provided for the honeycomb-like vent hole assembly portion 96 of the outer plate 21 and the vent openings 97 opened in the recess 27 as the recess of the inner plate 23. The ventilation opening 97 of the inner plate 23 is formed to be slightly larger than the honeycomb-shaped ventilation hole assembly portion 96 of the outer plate 21.

  As shown in FIG. 14, the first damping recess 71 as the first damping engagement portion is in a closed state around the entire periphery formed on the projection 29 of the inner plate 23 in the vertical surface portion 20 a of the door panel 20. The second vibration-damping recess 72 as the second vibration-damping engaging portion is a notch that is open on one side formed in the convex portion 29 of the inner plate 23 in the folding surface portion 20b of the door panel 20. A recess having a portion 77.

  The first damping plunger as the first damping body inserted into the first damping recess 71 and the second damping as the second damping body inserted into the second damping recess 72. Since the swing plunger is the same as that shown in FIGS. 1 and 3, the description thereof is omitted.

  According to the embodiment shown in FIGS. 13 and 14, the inside chamber of the side door 17 can be ventilated by ensuring the air permeability through the vent hole 95 and the vent opening 97. It can correspond to. Further, the vibration of the door panel 20 can be surely suppressed by the engagement of the two vibration-suppressing recesses 71 and 72 and the two vibration-suppressing plungers fitted to them. In particular, the vertical surface portion of the inner plate 23 can be pressed. Even if it is a folded curved surface portion 20b that is not easy and does not easily stretch, it is possible to engage the second damping plunger by opening one side of the second damping recess 72. A recess having a depth can be drawn, and necessary friction can be obtained even by engagement between the second vibration-damping recess 72 and the second vibration-damping plunger, and vibration of the door panel 20 can be reliably suppressed.

  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 showing one embodiment of a door device concerning the present invention. It is the internal view which expanded the principal part of the door panel of the door apparatus same as the above. It is the side view which notched the principal part of the door apparatus same as the above. It is a perspective view of the outer surface side which shows the door panel of a door apparatus same as the above. It is a perspective view of the inner surface side which shows the door panel of a door apparatus same as the above. It is a partial expanded sectional view of the door panel of a door apparatus same as the above. It is a perspective view of the latch apparatus provided in the door 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 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 same as the above. It is an expanded inner surface of the principal part which shows other embodiment in the door panel of the door apparatus which concerns on this invention. It is a perspective view of the inner surface side which shows another embodiment of the door panel of the door apparatus which concerns on this invention. It is a perspective view of the inner surface side which expanded the principal part of embodiment shown by FIG. It is a perspective view of the working machine provided with 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
20a Vertical surface
20b Folded surface
21 Outer plate
22 space
23 Inner plate
24 Foam
36, 37 Hinge
41 frames
42 Latch device
71 First damping recess as a first damping engaging portion
72 Second damping recess as second damping engaging part
73 First damping plunger as first damping body
74 Second damping plunger as second damping body
91 Slope

Claims (4)

Frame,
A door panel in which the upper part is bent to the frame side with respect to the vertical surface part that is attached to the frame by a hinge on one side so as to be openable and closable in the horizontal direction;
A latch device capable of engaging and disengaging the vertical surface portion to the frame side on the other side opposite to the hinge of the door panel;
A first damping engagement portion provided inside the vertical surface portion at the other side portion of the door panel;
A second damping engagement portion provided inside the folded curved surface portion at the other side portion of the door panel;
A first damping body provided on the frame side and detachable from the first damping engagement portion as the door panel opens and closes;
A second vibration-damping engagement portion provided on the frame side and opening and closing of the door panel;
The first vibration damping engagement part and the first vibration damping body are engaged in the vertical direction, and the second vibration damping engagement part and the second vibration damping body are engaged in the vertical direction. Feature door device. Door panel
An outer plate,
An inner plate that is fixed to the inner surface of the outer plate and that is thinner than the outer plate forming a space between the outer plate and the outer plate;
A foam filled in the space between the outer plate and the inner plate;
The door device according to claim 1, wherein the first damping engagement portion and the second damping engagement portion are formed on an inner plate. The first vibration damping engagement portion is a recess that is formed on the inner plate of the vertical surface portion and is closed on the entire circumference.
3. The door device according to claim 2, wherein the second vibration-damping engagement portion is a recess formed on one side of the folded curved surface portion and opened on one side. The first vibration damping engagement portion is a recess that is formed on the inner plate of the vertical surface portion and is closed on the entire circumference.
The door device according to claim 2, wherein the second vibration damping engagement portion is a slope portion formed on the inner plate at a corner portion of the folded curved surface portion.

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