JP2010047964A - Door panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door panel which can secure bonding strength when an inside plate is bonded to an outdoor plate with an adhesive, can use a proper amount of an adhesive, and can prevent the outside plate from being deformed by a shrinkage cavity of the adhesive. <P>SOLUTION: An adhesive-coated portion 34a coated with the adhesive is provided between all peripheral edges of the outside and inside plates 21 and 23 along a hemming-worked portion 33. An adhesive-coated portion 34b coated with the similar adhesive is provided in each joint 27 along a protrusion 29. An adhesive-coated portion 34e coated with the adhesive is provided between the outside plate 21 and the joint 27 of the inside plate in such a manner as to cross the central portion of the horizontally-disposed joint 27. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

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

  As a cover body structure of a work machine, there is a double structure composed of an outer plate and an inner plate, the inner plate has a plurality of recesses, and the recesses of the inner plate are bonded to the outer plate, and the outer plate The outer side plate and the inner side plate are fixed by hemming the peripheral edge of each other (see, for example, Patent Document 1).

  For example, as a double-structured door panel 20 as shown in FIG. 7, an uneven inner plate 23 is fixed to the inner surface of the outer plate 21, and the inner plate 23 is an inner joint portion joined to the outer plate 21. 27 and the outer peripheral joint portion 28, a convex portion 29 bulging around the joint portion 27, and a plurality of convex strip portions 30 provided in the longitudinal direction in each joint portion 27, and an outer plate 21 is structurally superior in that a hemming portion 33 is formed by crushing the outer peripheral edge portion folded back along the joint portion 28 of the inner plate 23.

In the door panel 20, when an adhesive is applied between the outer plate 21 and the inner plate 23, an adhesive application portion 34a is provided at the outer peripheral joint 28 along the hemming portion 33, and the inner plate 23 It is conceivable that an adhesive application part 34b is provided at the joint part 27 on the inner peripheral edge along the convex part 29, and an adhesive application part 34c is provided at the joint part 27 along the plurality of convex line parts 30.
JP-A-9-228412 (page 2-3, FIG. 2-8)

  When the adhesive application part 34c is provided along the protruding line part 30, there is too much adhesive of the thermosetting resin, and the shrinkage of the volume that occurs when this adhesive is thermally cured occurs remarkably. It has been found that the outer plate 21 may be deformed due to the shrinkage of the adhesive.

  The present invention has been made in view of the above points, and can secure the adhesive strength when the inner plate is bonded to the outer plate with an adhesive, and the amount of the adhesive used can be appropriately obtained, and the adhesive can be drawn. An object of the present invention is to provide a door panel that can prevent deformation of the outer plate due to the above.

  The invention described in claim 1 includes an outer plate and an uneven inner plate fixed to the inner surface of the outer plate, and the outer plate is an outer peripheral edge folded back along the outer peripheral edge of the inner plate. A hemming portion formed by crushing the portion, the inner plate is formed into a concave shape that is elongated in the lateral direction and joined to the outer plate, and a convex portion that is bulged around the joint portion A plurality of protruding strips provided in the longitudinal direction in the joint portion, and an adhesive application portion on the outer peripheral edge in which an adhesive is applied between the outer peripheral edge portions of the outer plate and the inner plate along the hemming portion And an adhesive application part on the inner peripheral edge where the adhesive is applied between the outer peripheral plate and the joint part of the inner plate along the inner peripheral edge part of the convex part of the inner side plate, and the other end from the longitudinal end of the joint part. A central adhesive application portion on which an adhesive is applied to cross a plurality of protrusions on the central portion over the end portion; A panel.

  The invention described in claim 2 is such that the central adhesive application portion in the door panel of claim 1 is provided continuously with the adhesive application portion on the inner periphery.

  According to the first aspect of the present invention, the adhesive strength can be ensured by the adhesive application part on the outer peripheral edge, the adhesive application part on the inner peripheral edge, and the adhesive application part on the center, and the use of the adhesive Since the amount is appropriately obtained and the central adhesive application part is provided by intersecting the plurality of convex stripes on the central part extending from one end part in the longitudinal direction to the other end part in the joint part, the outer plate due to the shrinkage of the adhesive Can be prevented from being deformed.

  According to the invention described in claim 2, since the central adhesive application part is provided continuously with the inner peripheral adhesive application part, the inner peripheral adhesive application part is changed to the central adhesive application part. Adhesive can be applied efficiently by continuously supplying the adhesive in the manner of a single stroke.

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

  FIG. 6 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, a side door 17, and the like.

  1 to 5 show the door panel 20 of the side door 17. As shown in FIG. 5, the door panel 20 is press-molded in an uneven shape with respect to the outer plate 21 and the outer plate 21, and the outer plate 21 is pressed. A concave portion is fixed to the inner surface of the inner plate 23 and an inner plate 23 that forms a space 22 between the convex portion and the outer plate 21, and foam filled in the space 22 between the outer plate 21 and the inner plate 23. Material 24.

  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 a thin iron plate of 0.6 mm, 0.8 mm, etc. in order to satisfy the conflicting strength and workability. Since this is suitable for one-time punching, various uneven portions described below are formed by pressing so as to obtain a predetermined strength.

  As shown in FIG. 5, 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 FIGS. 1, 4, and 5, the inner plate 23 is formed in a concave shape and joined to the outer plate 21 as joints 27 and 28 as recesses. And a bulge-formed convex portion 29. The joint portion 27 is a large-sized rectangular concave portion that is regularly arranged so that a ventilation window hole can be drilled, and the joint portion 28 is a peripheral concave portion provided along the outer peripheral edge.

  As shown in FIGS. 1 and 4, the joint portion 27 of the inner plate 23 is provided with a ridge portion 30 having an adhesive reservoir space for storing the adhesive 34. The ridge portions 30 of the inner plate 23 are provided in a convex shape in the vertical direction so as to partition the joint portion 27 in the horizontal direction into a plurality.

  As shown in FIG. 5, the peripheral edge 31 of the outer plate 21 is hemmed so that the entire peripheral edge of the inner plate 23 is folded and wrapped so as to wrap. That is, the outer plate 21 includes a hemming portion 33 that bites and joins the joint portion 28 of the inner plate 23 with a peripheral portion formed by folding back and flattening so as to wrap around the joint portion 28 of the inner plate 23.

  As shown in FIGS. 1 and 2, an adhesive application portion 34 a to which an adhesive 34 is applied is provided along the hemming portion 33 between the outer peripheral edges of the outer plate 21 and the inner plate 23. The outer peripheral edge adhesive application portion 34a is formed by applying an adhesive 34 between the outer peripheral edge portions of the outer plate 21 and the inner plate 23 along the hemming portion 33, and is bonded by the applied adhesive 34. And a seal is made. The adhesive 34 is preferably a paste-type structural adhesive having viscosity and thermosetting properties.

  Further, as shown in FIGS. 1 and 3, a similar adhesive 34 is applied between the outer plate 21 and the joint portion 27 of the inner plate 23 along the inner peripheral edge of the convex portion 29 of the inner plate 23. An adhesive application part 34b on the inner peripheral edge is provided.

  Furthermore, in order to cross the central part of the plurality of joints 27 arranged in the left-right direction, intersect with the plurality of ridges 30 on the central part extending from one end to the other end in the longitudinal direction of the joint 27, Between the outer plate 21 and the joint portion 27 of the inner plate, a central adhesive application part 34e to which an adhesive 34 is applied is provided.

  The inner-periphery adhesive application part 34b and the central adhesive application part 34e are shown in FIG. 3 with the capacity of one stroke of the adhesive 34 continuously supplied from an adhesive application nozzle (not shown). In this way, it is applied continuously.

  FIG. 4 is an exploded perspective view of the side door 17 so as to be sandwiched between the outer plate 21 and the 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.

  When the internal reinforcing plate 41 is positioned and fitted, the concave and convex joint portion 42 of the internal reinforcing plate 41 is brought into close contact with the back surface of the concave and convex joint portion 47 of the inner plate 23 to which the adhesive 34 is applied. Since the hinge 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 connected 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.

  As shown in FIG. 4, the hinge mounting surface portions 43 and 44 of the internal reinforcing plate 41 are provided with bolt insertion holes 43h and 44h, respectively, and the nuts are attached to the back surfaces of these bolt insertion holes 43h and 44h. (Not shown) are welded so that the mounting bolts inserted through the bolt insertion holes 53h and 54h provided in the hinges 53 and 54, respectively, are screwed into the nuts on the back surface of the hinges 53 and 54. Fix to the internal reinforcing plate 41.

  As shown in FIG. 4, the outer plate 21 and the inner plate 23 are provided with mounting holes 55a and 55b for mounting the latch device, respectively, and these are combined to form the mounting hole 55 shown in FIG. Is formed. An adhesive application part 34d is provided at the joint part on the inner peripheral side along the convex part 29 around the mounting hole part 55.

  As shown in FIG. 5, the inner plate 23 has a convex portion 29 bulged 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 upper portion. The convex part 29 and the reinforcement deformation | transformation part 56 are formed in endless form along the concave junction part 27, as FIG. 1 shows.

  Among the convex portions 29 that are bulged and formed with respect to the joint portion 27, the inner plate 23 is provided with the reinforcing convex portions 29a on the protruding reinforcing convex portions 29a that are continuously bulged and formed in the lateral direction. A concave reinforcing recess 70 is formed in the transverse direction.

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

  A foam material 24a is affixed in the convex portion 29 of the inner plate 23 or on the inner surface of the outer plate 21 (not shown), and an inner reinforcing plate 41 for attaching the hinge is disposed in the convex portion 29 on one side of the inner plate 23. Further, a thermosetting adhesive 34 necessary for bonding to the outer plate 21 is applied to the bonding portion 27 and the inner reinforcing plate 41 as the recesses of the inner plate 23, and the outer plate 21 and the inner plate 23 Are positioned and overlapped, and the peripheral portion 31 of the outer plate 21 is folded by hemming with the joint portion 28 of the inner plate 23 sandwiched therebetween, and then folded, so that the inner plate 23 and the inner reinforcing plate 41 are formed on the inner surface of the outer plate 21. Join.

  Then, the adhesive 34 is cured by heating of the baking coating heating facility to bond the inner plate 23 and the internal reinforcing plate 41 to the outer plate 21, and further, the heating of the baking coating heating facility is shown in FIG. In this way, the foam material 24a is foamed so that the space 22 is filled with the foam material 24, and further, the paint sprayed in advance on the outer surfaces of the outer plate 21 and the inner plate 23 is heated by the heating equipment for baking coating. Bake.

  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, through the hinge mounting windows 48 and 49 of the inner plate 23, the hinges 53 and 54 are placed on the hinge mounting surface portions 43 and 44 of the internal reinforcing plate 41 and welded to the back surfaces of the bolt insertion holes 43h and 44h (see FIG. The hinges 53 and 54 are fastened by bolts that are screwed in (not shown).

  Next, the effect of this embodiment will be described.

  A 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 (1.2-5 of the inner plate 23). A solid closed door structure with a sufficient height formed with the outer plate 21 (having a plate thickness of .0 times) makes a strong door panel that can secure sufficient strength against impact from the outside at a low cost. Can be provided.

  That is, the hollow closed cross-section structure formed by the outer plate 21 and the inner plate 23 can ensure sufficient strength, and the inner plate 23 is bulged and formed with respect to the joint portion 27 that is in close contact with the outer plate 21. A reinforcing deformation portion 56 is formed in a step shape at an intermediate portion of the convex portion 29, and by increasing the height of the convex portion 29 by the reinforcing deformation portion 56 formed in the step shape, the secondary moment of inertia with respect to the load direction is Since it is proportional to the cube of the height of the convex portion 29, it is possible to further improve the strength of the inner plate 23 on which the convex portion 29 is formed, and to improve the strength of the entire door panel.

  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.

  Further, the adhesive application portion 34a at the outer peripheral edge, the adhesive application portion 34b at the inner peripheral edge, and the adhesive application portion 34e at the central periphery can ensure the adhesive strength and appropriately obtain the amount of the adhesive 34 used. In particular, since the central adhesive application part 34e is provided so as to intersect with the plurality of ridges 30 on the central part extending from one end part in the longitudinal direction to the other end part in the joint part 27, the outer plate due to the shrinkage of the adhesive 34 21 deformations can be prevented.

  Furthermore, since the central adhesive application part 34e is provided continuously with the inner peripheral adhesive application part 34b, the adhesive 34 is written in one stroke from the inner peripheral adhesive application part 34b to the central adhesive application part 34e. Thus, the adhesive can be applied efficiently.

  The present invention is applicable to a door panel of a work machine such as a hydraulic excavator.

It is an inner surface figure showing one embodiment of a door panel concerning the present invention. It is the enlarged view to which the II section of FIG. 1 was expanded. It is the enlarged view to which the III section of FIG. 1 was expanded. It is a disassembled perspective view of a door panel same as the above. It is an expanded sectional view of a door panel same as the above. It is a top view of the working machine provided with the door panel same as the above. It is an internal view which shows the door panel which has an adhesive agent application pattern compared with a door panel same as the above.

Explanation of symbols

20 Door panel
21 Outer plate
23 Inner plate
27 Joint
29 Convex
30 ridges
33 Hemming section
34 Adhesive
34a, 34b, 34e Adhesive application part

Claims (2)

An outer plate,
An uneven inner plate fixed to the inner surface of the outer plate,
The outer plate includes a hemming portion formed by crushing the outer peripheral edge folded back along the outer peripheral edge of the inner plate,
The inner plate
A joint part that is elongated in the lateral direction and formed into a concave shape and joined to the outer plate;
Convex parts bulging around the joint,
A plurality of ridges provided in the longitudinal direction in the joint,
An adhesive application portion on the outer peripheral edge in which an adhesive is applied between the outer peripheral edges of the outer plate and the inner plate along the hemming portion;
An adhesive application portion of the inner peripheral edge in which an adhesive is applied between the outer plate and the joint portion of the inner plate along the inner peripheral edge portion of the convex portion of the inner plate;
A door panel characterized by comprising: a central adhesive application portion where an adhesive is applied so as to intersect with a plurality of protrusions on a central portion extending from one longitudinal end portion to the other end portion in the joint portion. The door panel according to claim 1, wherein the central adhesive application portion is provided continuously with the inner peripheral adhesive application portion.

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