JP2009084844A - Door panel - Google Patents

Door panel Download PDF

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Publication number
JP2009084844A
JP2009084844A JP2007254458A JP2007254458A JP2009084844A JP 2009084844 A JP2009084844 A JP 2009084844A JP 2007254458 A JP2007254458 A JP 2007254458A JP 2007254458 A JP2007254458 A JP 2007254458A JP 2009084844 A JP2009084844 A JP 2009084844A
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Japan
Prior art keywords
plate
portion
inner
outer plate
outer
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Withdrawn
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JP2007254458A
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Japanese (ja)
Inventor
Ryoji Uto
亮二 宇戸
Original Assignee
Caterpillar Japan Ltd
キャタピラージャパン株式会社
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Application filed by Caterpillar Japan Ltd, キャタピラージャパン株式会社 filed Critical Caterpillar Japan Ltd
Priority to JP2007254458A priority Critical patent/JP2009084844A/en
Publication of JP2009084844A publication Critical patent/JP2009084844A/en
Application status is Withdrawn legal-status Critical

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Abstract

To provide a door panel capable of reinforcing strength reduced by installation of an opening for ventilation of an inner plate formed in an uneven shape with respect to an outer plate.
SOLUTION: Between an outer plate 21 in which a honeycomb-shaped vent hole assembly portion 26 in which a plurality of vent holes 25 are aggregated is opened and a convex portion 29 of an inner plate 23 in which a corresponding vent opening portion 30 is provided, The internal reinforcing frame 61 is positioned and fixed. The internal reinforcing frame 61 is formed by cutting and raising a tongue piece 62 on one side, and forming a concave groove 63 at every predetermined pitch on the lower surface. The internal reinforcing frame 61 is brought into contact with the uneven joint portion 42 of the internal reinforcing plate 41 for hinge attachment.
[Selection] Figure 1

Description

  The present invention relates to a door panel including an outer plate and an inner plate.

  FIG. 14 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 mounted on the upper swing body 12. Is installed. The power unit 15 is covered with an upper cover 16 and side doors 17 and 18. The side doors 17 and 18 are attached so as to be openable and closable by a hinge which will be described later, and the closed state is maintained by a latch device 19.

As the side doors 17 and 18 of the work machine, there is a double-structured door panel composed of an outer plate and an inner plate. The inner plate of such a door panel has a plurality of concave portions, and the concave portion of the inner plate is provided on the outer plate. While adhering, the outer side plate and the inner side plate are fixed by hemming the peripheral portion of the outer side plate (see, for example, Patent Document 1).
JP-A-9-228412 (second page, FIG. 8)

  In this conventional side door, the outer plate and the inner plate can be integrated to ensure the strength in the portion having the concave portion of the inner plate and the hemming portion of the outer plate, but the inner plate has a gap with respect to the outer plate. It is difficult to ensure sufficient strength at the convex portion. In particular, in the case where a vent opening for countermeasures against extreme heat is provided in the concave portion of the inner plate, insufficient strength tends to occur around the vent opening.

  This invention is made in view of such a point, and it aims at providing the door panel which can reinforce the intensity | strength reduced by installation of the opening part for ventilation | gas_flowing of the inner side board shape | molded unevenly with respect to the outer side board. .

  According to the first aspect of the present invention, an opening corresponding to the hole of the outer plate is formed in the outer plate having a hole, and a concave portion that is formed in an uneven shape with respect to the outer plate and is fixed to the inner surface of the outer plate. It is a door panel comprising an inner plate provided and an internal reinforcing frame disposed in a space in a series of convex portions provided around the opening of the inner plate.

  According to a second aspect of the present invention, in the door panel according to the first aspect, a foam material filled in a space between the outer plate and the convex portion of the inner plate is provided, and the internal reinforcing frame is formed by the foam material. It is fixed.

  According to a third aspect of the present invention, in the door panel according to the first or second aspect of the present invention, the door panel includes an internal reinforcing plate for hinge attachment that is positioned and fixed between the convex portion of the inner side plate and the outer side plate. The frame is bonded to the internal reinforcing plate with an adhesive.

  According to the invention described in claim 1, an opening corresponding to the hole of the outer plate is provided in the concave portion of the inner plate formed in an uneven shape with respect to the outer plate, and a series of the openings provided around the opening. Since the internal reinforcement frame is disposed in the space in the convex portion, the strength reduced by the installation of the opening can be effectively reinforced by the internal reinforcement frame.

  According to the invention described in claim 2, since the internal reinforcement frame is fixed by the foam filled in the space between the outer plate and the convex portion of the inner plate, the internal reinforcement frame is fixed to the outer plate or the inner plate. Even without fixing to the plate, the internal reinforcing frame can be prevented from moving inside, and the labor of fixing the internal reinforcing frame can be saved.

  According to the invention described in claim 3, when the internal reinforcing frame is joined to the internal reinforcing plate for hinge mounting, which is positioned and fixed between the convex portion of the inner plate and the outer plate, with an adhesive. Since the internal reinforcing plate and the internal reinforcing frame reinforce each other, the reinforcing effect of the door panel can be improved.

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

  FIG. 13 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 side door 17 is attached so as to be openable and closable by a hinge which will be described later, and is kept closed by a latch device which will be described later.

  4 to 8 show the door panel 20 of the side door 17. As shown in FIGS. 5 and 6, the door panel 20 is formed by pressing the outer plate 21 and the outer plate 21 in an uneven shape. A concave portion is fixed to the inner surface of the outer plate 21 and an inner plate 23 that forms a space 22 between the convex portion and the outer plate 21, and a space 22 between the outer plate 21 and the inner plate 23 is filled. Foamed material 24 is provided.

  The outer plate 21 has a thickness 1.2 to 5.0 times that of the inner plate 23. In other words, the inner plate 23 uses an iron plate having a thickness smaller than that of the outer plate 21. For example, when the outer plate 21 is a 1.2 mm iron plate, the inner plate 23 is preferably an iron plate of 0.6 mm, 0.8 mm or the like in order to satisfy the conflicting strength and workability.

  As shown in FIG. 6, the foam material 24 heats an unfoamed sheet-like foam material 24 a affixed to the inner surface of the inner plate 23 in a space 22 between the outer plate 21 and the inner plate 23. Foam and mold. The foam material 24a is desirably a highly foamable rubber-based sound absorbing material having a volume expansion coefficient of about 20 times. It is desirable to heat the foam material 24a simultaneously with the baking coating using a baking coating heating device.

  As shown in FIG. 4 and FIG. 7, the outer plate 21 has a plurality of holes formed as regular hexagons, in which a plurality of holes 25 are gathered in a honeycomb shape through a joint portion of each side of the holes 25. A plurality of honeycomb-shaped vent hole assembly portions 26 as the vent hole assembly portions are provided by hole processing.

  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 as openings 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.

  As shown in FIGS. 9 to 11, the peripheral portion 31 of the outer plate 21 is hemmed so as to be folded and crushed so as to wrap around the peripheral portion 32 of the inner plate 23. That is, the outer plate 21 includes a hem processing portion 33 that bites and joins the peripheral portion 32 of the inner plate 23 with a peripheral portion 31 formed by folding back and flattening so as to wrap around the peripheral portion 32 of the inner plate 23. Yes.

  As shown in FIG. 9, at least the peripheral edge portion 32 of the inner plate 23 is bonded to the outer plate 21 with an adhesive 34, and the outer plate 21 and the inner plate 23 are bonded to each other at the hemming portion 33 by the adhesive 34. And seal. The adhesive 34 is preferably a paste-type structural adhesive having viscosity and thermosetting properties.

  As shown in FIG. 10 and FIG. 11, the corner portion of the outer plate 21 and the folded portion of the intermediate bent portion are notched at the peripheral edge portion 31 of the outer plate 21, respectively. An intermediate bent portion notch groove 36 is formed. The corners of the inner plate 23 corresponding to the corner cutout grooves 35 of the outer plate 21 are formed in an arc shape.

  FIG. 1 shows an exploded perspective view of the side door 17 so that it is sandwiched between an outer plate 21 and an inner plate 23 that is positioned with respect to the outer plate 21 and fixed to the inner surface of the outer plate 21. The internal reinforcing plate 41 for attaching the hinge is fixed.

  The internal reinforcing plate 41 is provided with a concave / convex joint portion 42 in which a concave / convex portion is repeatedly formed in the central portion, and hinge mounting surface portions 43 and 44 are continuously formed on one end side and the other end side of the concave / convex joint portion 42, respectively. One positioning fitting portion 45 and the other positioning fitting portion 46 are formed in a concave groove shape adjacent to the hinge mounting surface portions 43 and 44.

  With respect to the internal reinforcing plate 41, the convex portion 29 on the hinge mounting side of the inner plate 23 is provided with a concave / convex joint portion 47 in which a concave / convex portion is repeatedly formed in the center portion. Hinge mounting windows 48 and 49 are opened on the end sides, respectively, and one positioning fitting portion 51 and the other positioning fitting portion 52 protrude downwardly adjacent to the hinge mounting windows 48 and 49. It is formed in a shape.

  In the internal reinforcing plate 41, the size of one positioning fitting portion 45 and the other positioning fitting portion 46 are different. Similarly, in the inner plate 23, the size of one positioning fitting portion 51 and the other positioning fitting portion 52 are different. One positioning fitting portion 45 and positioning fitting portion 51 respectively provided at one corresponding position of the inner reinforcing plate 41 and the inner plate 23 are indented into each other so that the inner reinforcing plate 41 and the inner plate 23 are fitted. The other positioning fitting portion 46 and the positioning fitting portion 52 provided at the other corresponding position of each other are concavo-convexly fitted to each other.

  During positioning and fitting of the internal reinforcing plate 41, the concave / convex joint portion 42 of the internal reinforcing plate 41 is brought into close contact with the back surface of the concave / convex joint portion 47 of the inner plate 23 coated with an adhesive, and the hinge of the internal reinforcing plate 41 Since the mounting surface portions 43 and 44 are aligned with the hinge mounting windows 48 and 49 of the inner plate 23, the hinges 53 and 54 are attached to the hinge mounting surface portions 43 and 44 of the internal reinforcing plate 41 through these hinge mounting windows 48 and 49. Install each by welding.

  The outer plate 21 and the inner plate 23 are provided with mounting holes 55a and 55b for mounting the latch device 19.

  As shown in FIG. 1, the inner side plate 23 is formed in an uneven shape with respect to the outer side plate 21, and the honeycomb-like ventilation hole of the outer side plate 21 is formed in a joint portion 27 as a concave portion fixed to the inner surface of the outer side plate 21. Three rows of ventilation openings 30 corresponding to the gathering portion 26 are provided, and in the space in the series of convex portions 29 provided around the ventilation openings 30 in the center of the three rows of the inner plate 23. An internal reinforcing frame 61 is disposed.

  That is, the inner reinforcing frame 61 is positioned and fixed between the outer plate 21 having the honeycomb-shaped vent hole assembly portion 26 in which the plurality of vent holes 25 are gathered and the convex portion 29 of the inner plate 23. Yes.

  As shown in FIG. 2, the internal reinforcing frame 61 is formed with tongue pieces 62 formed on one side portion, and recessed grooves 63 are formed at every predetermined pitch on the lower surface.

  As shown in FIG. 3, the internal reinforcing frame 61 has a tongue piece 62 in contact with a frame receiving surface portion 42 a welded to the concave and convex joint portion 42 of the internal reinforcing plate 41 for hinge attachment. .

  As shown in FIG. 6, the internal reinforcing frame 61 is fixed by the foam material 24 filled in the space 22 between the outer plate 21 and the convex portion 29 of the inner plate 23. The tongue piece 62 of the reinforcing frame 61 may be joined to the frame receiving surface portion 42a of the internal reinforcing plate 41 with an adhesive. In that case, the strength can be further improved as compared with the case where the internal reinforcing plate 41 and the internal reinforcing frame 61 are separated.

  FIG. 12 shows a method of manufacturing the door panel 20 incorporating the internal reinforcing plate 41. (a) Positioning the internal reinforcing plate 41 within the convex portion 29 of the inner plate 23 bulged and formed with respect to the outer plate 21. Then, the adhesive is applied between the concave and convex joint portions 42 and 47. A thermosetting adhesive 34 is also applied to the joint surfaces of the inner plate 23 and the inner reinforcing plate 41 that are joined to the outer plate 21. (B) The inner plate 23 in an adhesive-applied state is fitted into the peripheral portion 31 of the outer plate 21 with the inner reinforcing plate 41 in the bent and opened state while the peripheral portion 31 of the outer plate 21 is being hemmed. The inner plate 23 and the inner reinforcing plate 41 are positioned with respect to the outer plate 21. (C) The inner plate 23 and the inner reinforcing plate 41 are joined and fixed to the inner side surface of the outer plate 21 by folding the peripheral portion 31 of the outer plate 21 with the peripheral portion 32 of the inner plate 23 sandwiched by hemming. Seal.

  As shown in FIG. 6, the inner plate 23 has a convex portion 29 bulging out with respect to the joint portion 27 that is formed in a concave shape and is in close contact with the outer plate 21. A step-shaped reinforcing deformation portion 56 is formed in the middle of the direction. The joint portion 27 of the inner plate 23 is bonded to the outer plate 21 by the adhesive 34, and the rising portion 57 of the convex portion 29 with respect to the joint portion 27 is continuously formed in an arc shape.

  The convex portion 29 and the reinforcing deformation portion 56 are formed endlessly along the concave joint portion 27 as shown in FIGS.

  As shown in FIG. 8, the inner plate 23 includes an adhesive reservoir 68 having a space for storing an adhesive in a joint 27 bonded to the outer plate 21 with an adhesive. The adhesive reservoir 68 of the inner plate 23 is provided in a continuous convex manner in the longitudinal joint 27 along the vent opening 30 provided at a location corresponding to the vent hole 25 of the outer plate 21. ing.

  As shown in FIG. 8, the inner plate 23 includes convex portions 29 that are bulged with respect to the joint portions 27 and 28, and among the convex portions 29, the upper and lower portions of the vent opening 30 are provided. Is provided with a projecting reinforcing convex portion 29a which is continuously bulged and formed along a lateral joint portion 27 which is continuously bonded to the outer plate 21, and the reinforcing convex portion 29a is further provided. Reinforcing recesses 70 are formed in a concave shape in the transverse direction.

  Next, the manufacturing process of the door panel 20 will be described.

  As shown in FIG. 6, a foam material 24a is affixed in the convex portion 29 of the inner plate 23, and the hinge mounting inner portion is placed in the convex portion 29 on one side of the inner plate 23 as shown in FIG. The reinforcing plate 41 is bonded, and further, a thermosetting adhesive 34 necessary for bonding to the outer plate 21 is applied to the bonding portion 27 as the concave portion of the inner plate 23 and the inner reinforcing plate 41, and FIG. The outer plate 21 and the inner plate 23 are positioned and overlapped as shown in FIG. 12 (c), and the peripheral portion 31 of the inner plate 23 is hemmed as shown in FIG. 12 (c). The inner plate 23 and the inner reinforcing plate 41 are joined to the inner side surface of the outer plate 21 by folding and folding.

  Then, the adhesive 34 is cured by heating of the baking coating heating equipment to bond the inner plate 23 and the internal reinforcing plate 41 to the outer plate 21, and further, as shown in FIG. 6, heating of the baking coating heating equipment. The foam material 24a is foamed by this, the space 22 is filled with the foam material 24, and the paint sprayed in advance on the outer surfaces of the outer plate 21 and the inner plate 23 is baked by heating of the baking coating heating equipment. wear.

  For example, the thermosetting of the adhesive 34 is performed at 150 ° C. for 5 minutes, the foaming material 24 is foamed at 150 ° C. for 20 minutes, and the baking finish is performed at 180 ° C. to 200 ° C. for 20 minutes. Heat. These heating can be performed using the existing baking heating equipment.

  Finally, as shown in FIG. 8, the hinges 53 and 54 are welded to the hinge mounting surface portions 43 and 44 of the internal reinforcing plate 41 by fillet welding or the like through the hinge mounting windows 48 and 49 of the inner plate 23, respectively. At the same time, the latch device 19 is attached to the mounting holes 55a and 55b of the outer plate 21 and the inner plate 23.

  Next, effects of the embodiment shown in FIGS. 1 to 13 will be described.

  As shown in FIG. 6, the hollow closed cross-sectional 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 is thicker than the inner plate 23 (inner side). The hollow closed cross-section structure with a sufficient height formed with the outer plate 21 (having a plate thickness 1.2 to 5.0 times that of the plate 23) provides sufficient strength against impact from the outside. A strong door panel that can be secured can be provided at low cost.

  Furthermore, the vibration can be absorbed by the foam material 24 filled between the outer plate 21 and the inner plate 23, and the sound generated from the door panel itself can be effectively attenuated, that is, the sound attenuation effect is high. Low noise can be achieved.

  As shown in FIGS. 5 and 8, the inner plate 23 is thinner than the outer plate 21 by bulging and forming the convex portion 29 with respect to the joint portion 27 formed in the concave shape of the inner plate 23. Even if it exists, it can shape | mold so that rigidity may be increased with a concavo-convex structure and can raise intensity | strength.

  As shown in FIG. 9 and FIG. 10, the hemming portion formed by folding and crushing the peripheral edge 31 of the outer plate 21 so as to wrap around the peripheral edge 32 of the inner plate 23 causes the outer thickness of the outer plate 21 to be thicker than that of the inner plate 23. Even with the plate 21, a hemming portion 33 having a fixed shape can be obtained, and a folded joint portion with stable quality can be obtained.

  That is, the hemming portion 33 that bites and joins the peripheral edge portion of the inner side plate 23 with the peripheral edge portion of the outer side plate 21 is folded back so as to wrap around the peripheral edge portion of the inner side plate 23. The shape of the hemming portion 33 of the outer plate 21 can be stabilized and the uniform quality can be maintained from the conventional hemming finish in which the bent portion is bulged into a circular cross section.

  At this time, it is not easy to fold the peripheral edge of the outer plate 21 at the corner and the intermediate bent portion of the outer plate 21, but the outer plate 21 is cut by the corner notch groove 35 as shown in FIGS. Since the folded portion of the corner portion of the outer plate 21 is cut out by the middle bent portion cutout groove 36, the corner portion and the middle bent portion of the outer plate 21 are also cut out. It is possible to easily and accurately process the peripheral portion 31 of the outer plate 21 to be folded back and flattened.

  As shown in FIG. 9, the outer plate 21 and the inner plate 23 can be reliably integrated by bonding with the adhesive 34 and the hemming portion 33 of the outer plate 21.

  As shown in FIG. 10, the corners of the inner side plate 23 corresponding to the corner notch grooves 35 of the outer side plate 21 are formed in an arc shape so that the corners of the inner side plate 23 are the corner notches of the outer side plate 21. Protruding from the groove 35 can be prevented.

  As shown in FIG. 11, the ventilation opening 30 of the inner plate 23 is provided larger than the honeycomb-shaped ventilation hole assembly 26 of the outer plate 21, so that the inner plate 23 is integrated with the inner surface of the outer plate 21. Even when manufacturing tolerances occur, that is, even if the alignment of the outer plate 21 and the inner plate 23 is not accurate due to the size tolerance of the press-formed product, the honeycomb-like vent hole set of the outer plate 21 Since the portion 26 is displaced within the range of the ventilation opening 30, it is possible to prevent the inner plate 23 from blocking the honeycomb-shaped ventilation hole assembly portion 26 of the outer plate 21, and the ventilation openings of the outer plate 21 and the inner plate 23 can be prevented. The area is not damaged, a predetermined opening area can be secured, the outer plate 21 and the inner plate 23 can be easily aligned, and the workability during manufacturing can be improved.

  As shown in FIG. 8, a sufficient ventilation opening area can be secured by the plurality of sets of honeycomb-shaped ventilation hole assembly portions 26 and the ventilation opening portions 30.

  As shown in FIG. 11, in the double-structure door panel of the outer plate 21 and the inner plate 23, the outer plate 21 can be opened with a high density in a honeycomb shape with respect to the limited ventilation opening 30 of the inner plate 23. The air vent 25 can form a honeycomb-shaped vent hole assembly portion 26 with high opening area efficiency. The honeycomb-shaped vent hole assembly portion 26 has a plurality of regular hexagonal vent holes 25 connected to each side of the vent hole. Since it is assembled in a honeycomb shape via the joint portions, it is possible to reduce the fluid resistance by narrowing the joint portions while ensuring the strength of the joint portions between the vent holes 25. The generation of turbulent flow due to the air flow being obstructed by the joint portion can be reduced from the vent hole assembly portion in which round holes and square holes are assembled.

  As shown in FIG. 1, the inner reinforcing plate 41 fixed between the inner plate 23 and the outer plate 21 at the convex portion 29 in which the inner plate 23 bulges with respect to the outer plate 21 of the door panel 20, The strength at the convex portion 29 can be reinforced, and in particular, the internal reinforcing plate 41 is positioned by the concave-convex fitting with respect to the inner plate 23. The position of 41 can be controlled, and the internal reinforcing plate 41 can be accurately positioned and fixed at the position where the reinforcement works most efficiently.

  That is, the positioning of the long internal reinforcing plate 41 with respect to the inner plate 23 is facilitated by the concave / convex fitting of one positioning fitting portion 45, 51 and the concave / convex fitting of the other positioning fitting portion 46, 52. You can be sure.

  Since the positioning fitting portions 45, 51 on one side and the positioning fitting portions 46, 52 on the other side are different in size, if the orientation of the internal reinforcing plate 41 is different, the positioning fitting portions 51, 52 of the inner plate 23 are different. Since the positioning fitting portions 45 and 46 of the internal reinforcing plate 41 cannot be aligned, the internal reinforcing plate 41 having directionality can be accurately incorporated into the inner plate 23.

  Since the hinges 53 and 54 are welded to the hinge mounting surface portions 43 and 44 of the internal reinforcing plate 41 through the hinge mounting windows 48 and 49 opened in the inner plate 23, the hinge is more than the case where the hinges 53 and 54 are attached to the inner plate 23. The mounting strength of 53 and 54 can be improved.

  As shown in FIG. 12, the inner plate 23 in an adhesive-applied state is attached to the inner reinforcing plate 41 in the peripheral portion 31 of the outer plate 21 in a bent and opened state while the peripheral portion 31 of the outer plate 21 is hemmed. The inner plate 23 and the inner reinforcing plate 41 are placed on the inner surface of the outer plate 21 by folding and positioning the peripheral portion 31 of the outer plate 21 with the peripheral portion 32 of the inner plate 23 sandwiched therebetween by hemming. Since the peripheral edge 31 in the middle of the hemming process of the outer side plate 21 is effectively used for positioning the inner side plate 23, the strength at the convex portion 29 of the inner side plate 23 that is formed in a concavo-convex shape with respect to the outer side plate 21 is secured. Can be secured by the internal reinforcing plate 41.

  As shown in FIG. 6, sufficient strength can be secured by the hollow closed cross-sectional structure formed by the outer plate 21 and the inner plate 23, and the inner plate 23 is connected to the joint portion 27 that is in close contact with the outer plate 21. On the other hand, since the reinforced deformation part 56 is formed in a stepped shape in the middle part of the bulge-formed convex part 29, the strength is improved compared to the inner plate in which the convex part 29 is simply formed without providing such a reinforced deformation part 56. And the strength of the entire door panel can be improved.

  As shown in FIG. 8, the joint portion 27, the convex portion 29 formed in an endless manner along the joint portion 27, and the reinforcing deformation portion 56 reinforce each other so that the strength of the inner plate 23 is increased as a whole. Can be improved over time.

  As shown in FIG. 8, an adhesive reservoir 68 for accumulating adhesive is provided in the joint 27 of the inner plate 23 bonded to the outer plate 21 with an adhesive. When pressed and adhered, the adhesive extruded from between the outer plate 21 and the joint portion 27 of the inner plate 23 remains in the adhesive reservoir space in the adhesive reservoir 68, and this adhesive is Bonding strength when cured can be maintained. When used as a side door, the adhesive reservoir 68 continuously provided in the longitudinal joining portion 27 also functions as a vertical column, and can improve strength against a vertical load.

  As shown in FIG. 8, along the joint portion 27 of the inner plate 23 continuously bonded to the outer plate 21, the projecting reinforcing convex portion 29a continuously bulging and forming is formed on the outer plate 21. Reinforcement that improves the strength of the bonded inner plate 23 can be achieved, and the reinforcing concave portion 70 formed in a concave shape in a direction transverse to the reinforcing convex portion 29a makes the reinforcement by the reinforcing convex portion 29a stronger. In short, the inner plate 23 can be strengthened by reinforcing the inner plate 23 by forming a complicated uneven shape on the inner plate 23 by the reinforcing convex portions 29a and the reinforcing concave portions 70 that intersect each other. can do.

  As shown in FIGS. 1 to 3, a vent opening 30 corresponding to the honeycomb-like vent hole assembly 26 of the outer plate 21 is formed in the joint portion 27 of the inner plate 23 that is formed in an uneven shape with respect to the outer plate 21. Since the internal reinforcement frame 61 is disposed in the space 22 in the series of convex portions 29 provided around the ventilation opening 30, the internal reinforcement frame 61 allows the ventilation opening 30 to be installed. The reduced strength can be effectively reinforced.

  As shown in FIG. 6, since the internal reinforcing frame 61 is fixed by the foam material 24 filled in the space 22 between the outer plate 21 and the convex portion 29 of the inner plate 23, the inner reinforcing frame 61 is moved to the outer side. Even if the inner plate 23 and the inner plate 23 are not fixed, it is possible to prevent the inner reinforcing frame 61 from moving inside, and the labor for fixing the inner reinforcing frame 61 can be saved.

  Further, when the tongue piece 62 of the internal reinforcing frame 61 is joined to the internal reinforcing plate 41 for hinge attachment, which is positioned and fixed between the convex portion 29 of the inner plate 23 and the outer plate 21, with an adhesive. The internal reinforcing plate 41 and the internal reinforcing frame 61 reinforce each other, and the reinforcing effect of the door panel 20 can be improved.

  The present invention can be used for a door panel of a work machine such as a hydraulic excavator shown in FIG.

It is a disassembled perspective view which shows one Embodiment of the door panel which concerns on this invention. It is a side view which shows the internal reinforcement frame body of a door panel same as the above. It is a perspective view which shows the attachment structure of the internal reinforcement frame body of a door panel same as the above. It is an external view of a door panel same as the above. It is the VV sectional view taken on the line of FIG. It is an expanded sectional view of FIG. It is a perspective view of the outer surface side of a door panel same as the above. It is a perspective view of the inner surface side of a door panel same as the above. It is sectional drawing of the hemming process part of a door panel same as the above. It is an internal view of the hemming process part of a door panel same as the above. It is an expansion perspective view of the inner surface side of a door panel same as the above. It is sectional drawing which shows the mounting process of the internal reinforcement board of a door panel same as the above, (a) is sectional drawing which positioned and adhered the internal reinforcement board in the inner side board, (b) is in the middle of the hemming process of an outer side board It is sectional drawing which positioned the inner side board and the internal reinforcement board in the peripheral part, (c) is sectional drawing which carried out the hemming process of the outer side board, and joined and fixed the inner side board and the internal reinforcement board. It is a top view of the working machine provided with the door panel same as the above. It is a perspective view which shows the outline | summary of the conventional working machine.

Explanation of symbols

21 Outer plate
22 space
23 Inner plate
24 Foam
25 ventilation holes as holes
27 Joint as a recess
29 Convex
30 Ventilation opening as opening
41 Internal reinforcing plate
61 Internal reinforcement frame

Claims (3)

  1. An outer plate with holes,
    An inner plate provided with an opening corresponding to a hole of the outer plate in a concave portion that is molded in an uneven shape with respect to the outer plate and is fixed to the inner surface of the outer plate;
    An internal reinforcing frame disposed in a space in a series of convex portions provided around the opening of the inner plate.
  2. With a foam material filled in the space between the outer plate and the convex portion of the inner plate,
    The door panel according to claim 1, wherein the internal reinforcing frame is fixed by the foam material.
  3. An internal reinforcing plate for hinge attachment that is positioned and fixed between the convex portion of the inner plate and the outer plate;
    The door panel according to claim 1 or 2, wherein the internal reinforcing frame is joined to the internal reinforcing plate with an adhesive.
JP2007254458A 2007-09-28 2007-09-28 Door panel Withdrawn JP2009084844A (en)

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JP2007254458A JP2009084844A (en) 2007-09-28 2007-09-28 Door panel

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JP2007254458A Withdrawn JP2009084844A (en) 2007-09-28 2007-09-28 Door panel

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Cited By (36)

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WO2012081496A1 (en) 2010-12-15 2012-06-21 日立建機株式会社 Exterior cover for construction machine
CN103375104A (en) * 2012-04-28 2013-10-30 通用汽车环球科技运作有限责任公司 Stiffened multi-layer compartment door assembly utilizing elastic averaging
US9061715B2 (en) 2012-08-09 2015-06-23 GM Global Technology Operations LLC Elastic cantilever beam alignment system for precisely aligning components
US9061403B2 (en) 2011-07-21 2015-06-23 GM Global Technology Operations LLC Elastic tube alignment system for precisely locating an emblem lens to an outer bezel
US9067625B2 (en) 2013-04-09 2015-06-30 GM Global Technology Operations LLC Elastic retaining arrangement for jointed components and method of reducing a gap between jointed components
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