JP2009108540A - Door panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door panel in which a stable state of an adhesive agent is secured when an outer plate is formed integrally with an inner plate by hemming processing and adhesion. <P>SOLUTION: An adhesive agent coated part 34a coated with the adhesive agent and an adhesive agent uncoated part 35 not coated with the adhesive agent are formed between the all the peripheral edge parts of the outer plate 21 and the inner plate 23 along the hemming processing part 33. The adhesive agent uncoated part 35 is formed only along the hemming processing part 33 formed at the upper edge parts of the panels. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

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

  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 side door 17 is attached so as to be openable and closable by a hinge which will be described later, and the closed state is held by the latch device 18.

Conventionally, the door structure combining two metal plates used in this type of vehicle is a structure that holds the entire peripheral edge of the inner plate by bending the outer plate (hemming finish) (for example, Patent Documents) 1).
JP-A-9-228412 (3rd page, FIG. 7-8)

  In this type of door structure, in order to prevent rainwater and the like from entering the space between the outer plate and the inner plate, bonding is performed between the outer peripheral portion of the outer plate and the inner plate along the hemming portion. The agent is applied. This adhesive is cured using a thermosetting resin with a heating device for baking coating. In this case, the internal pressure of the space formed between the outer plate and the inner plate increases, and the inner pressure increases the adhesive. Has a problem of jumping out.

  The present invention has been made in view of such points, and an object thereof is to provide a door panel that can ensure a stable state of an adhesive when an outer plate and an inner plate are integrated by hemming and bonding. To do.

  The invention described in claim 1 includes an outer plate, an inner plate that is fixed to the inner surface of the outer plate and that forms a space between the outer plate, and an outer plate that wraps around the entire periphery of the inner plate. A hemming portion formed by folding and crushing the entire peripheral edge of the adhesive, and an adhesive-applied portion and an adhesive-coated portion provided between the entire peripheral portion of the outer plate and the inner plate along the hemming portion. A door panel including an adhesive release portion to which no agent is applied.

  The invention described in claim 2 is such that the adhesive release portion in the door panel according to claim 1 is provided only along the hemming portion formed in the upper edge portion.

  According to a third aspect of the present invention, there is provided a joint portion in which the inner plate in the door panel according to the first or second aspect is formed in a concave shape and joined to the outer plate, and a convex portion formed by bulging with respect to the joint portion. The adhesive application part is provided at the joint along the convex part.

  According to a fourth aspect of the present invention, the hemming portion in the door panel according to any one of the first to third aspects includes a corner notch groove formed by notching a folded portion of a corner portion of the outer plate. is there.

  According to the invention described in claim 1, the entire periphery of the outer plate and the inner plate is formed along the hemming portion formed by folding the entire periphery of the outer plate so as to wrap around the periphery of the inner plate. Since the adhesive application part to which the adhesive is applied and the adhesive release part to which the adhesive is not applied are provided between the parts, the pressure release action from the adhesive release part prevents an increase in internal pressure during heating. The adhesive can be prevented from popping out due to the internal pressure, and a stable state of the adhesive can be secured when the outer plate and the inner plate are integrated by hemming and bonding.

  According to the second aspect of the present invention, the hemming portion formed on the upper edge portion is formed by being folded back and crushed downward, so that the adhesive is only along the hemming portion on the upper edge portion. By providing the adhesive release part to which no water is applied, it is possible to prevent the intrusion of rainwater.

  According to the invention described in claim 3, not only can the convex portion be bulged and formed into the concave portion of the inner plate to improve the strength of the inner plate due to the concavo-convex structure. And since the junction part provided along the convex part is adhere | attached on an outer side board with an adhesive agent, intensity | strength can be improved synergistically.

  According to the invention described in claim 4, the internal pressure is applied from the corner notch groove while maintaining the shape of the hemming portion by the corner notch groove formed by notching the folded portion of the corner portion of the outer plate. The pressure can be effectively removed, and the strength of the hemming portion can be maintained.

  Hereinafter, the present invention will be described in detail with reference to the first embodiment shown in FIGS. 1 to 12 and the second embodiment shown in FIGS.

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

  FIGS. 1 to 9 show a door panel 20 of the side door 17. As shown in FIG. 9, the door panel 20 is press-molded into an outer plate 21 and an outer plate 21 by pressing the outer plate 21 in an uneven shape. 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. 9, the foam material 24 heats an unfoamed sheet-like foam material 24 a attached 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, 7, and 8, the inner plate 23 is formed into a concave shape and joined to the outer plate 21. As shown in FIGS. 1, 7, and 8, And a bulge-formed convex portion 29. The joint portion 27 is a large-sized square concave portion that is regularly arranged so that a window hole for ventilation can be drilled. The joint portion 28 is fitted with a frame side locking member that prevents vertical vibration of the door panel 20. It is a small circular recess.

  As shown in FIGS. 9 to 11, the peripheral edge 31 of the outer plate 21 is hemmed so that the entire peripheral edge 32 is folded and folded so as to wrap around the entire peripheral edge 32 of the inner plate 23. That is, the outer plate 21 includes a hemming 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. .

  As shown in FIGS. 1 to 6, the adhesive application part 34 a to which the adhesive is applied and the adhesive are not applied between the entire peripheral edges of the outer plate 21 and the inner plate 23 along the hemming part 33. An adhesive release portion 35 is provided.

  The adhesive application part 34a joins and seals the outer plate 21 and the inner plate 23 in the hemming part 33 with the applied adhesive. The adhesive is preferably a paste-type structural adhesive having viscosity and thermosetting properties.

  The adhesive release part 35 is provided only along the hemming part 33 formed on the upper edge part. That is, the adhesive release portion 35 does not exist on the left and right side edge portions and the lower edge portion, and an adhesive is installed as a sealing material.

  Further, an adhesive application part 34b to which a similar adhesive is applied is provided at each joint 27 along the convex part 29, and also traverses the central part of the plurality of joints 27 arranged in the left-right direction. Thus, an adhesive application part 34c to which an adhesive is applied is provided between the outer plate 21 and the joint part 27 of the inner plate.

  As shown in FIG. 11, at the peripheral edge 31 of the outer plate 21, the folded portion of the corner portion of the outer plate 21 and the folded portion of the intermediate bent portion are notched, respectively. A partial notch groove 37 is formed. The corners of the inner side plate 23 corresponding to the corner notch grooves 36 of the outer side plate 21 are formed in an arc shape.

  FIG. 8 is an exploded perspective view of the side door 17. The side door 17 is sandwiched between the outer plate 21 and the inner plate 23 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.

  As shown in FIG. 8, 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. Further, an adhesive application portion 34e to which an adhesive is applied is provided between the outer side plate 21 and the joint portion provided at the outer peripheral edge portion of the internal reinforcing plate 41 shown in FIG.

  As shown in FIG. 9, the inner plate 23 has a convex portion 29 bulging out from 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.

  As shown in FIGS. 1, 6, and 7, the inner plate 23 has an adhesive reservoir 68 having an adhesive reservoir space in which the adhesive is stored in a joint 27 bonded to the outer plate 21 with an adhesive. It has. The adhesive reservoir 68 of the inner plate 23 is provided in a convex shape in the vertical direction so as to partition the lateral joint 27 into a plurality.

  As shown in FIGS. 1, 7, and 8, the inner plate 23 includes a convex portion 29 that is bulged and formed with respect to the joint portion 27. A concave reinforcing concave portion 70 is formed in the projecting reinforcing convex portion 29a thus formed in a direction crossing the reinforcing convex portion 29a.

  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 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 bonded. The inner plate 23 and the inner reinforcing plate 41 are placed on the inner side surface of the outer plate 21 by folding and folding the peripheral portion 31 of the outer plate 21 with the peripheral portion 32 of the inner plate 23 being folded and folded by hemming. Join.

  Then, the adhesive 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. 9 by heating of the baking coating heating equipment. The foam material 24a is foamed to fill the space 22 with the foam material 24, and the paint sprayed on the outer surfaces of the outer plate 21 and the inner plate 23 in advance is baked by heating of the baking coating heating equipment. wear.

  For example, heat curing of the adhesive is performed at 150 ° C. for 5 minutes, foaming of the foam material 24 is performed at 150 ° C. for 20 minutes, and baking is performed at 180 ° C. to 200 ° C. for 20 minutes. do. 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 18 is attached to the mounting holes 55a and 55b of the outer plate 21 and the inner plate 23.

  Next, effects of the first embodiment shown in FIGS. 1 to 12 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.

  The outer plate 21 and the inner plate 23 can be reliably integrated by bonding with the adhesive applied to the adhesive application portions 34a, 34b, 34c, 34d, 34e and the hemming portion 33 of the outer plate 21. Even if the outer plate 21 is thicker than the inner plate 23 by the hemming portion 33 formed by folding and crushing the peripheral portion 31 of the outer plate 21 so as to wrap around the peripheral portion 32 of the inner plate 23, the shape is constant. The hemming portion 33 can be obtained, and a folded joint portion with stable quality can be obtained.

  Along the hemming part 33 formed by folding and crushing the entire peripheral edge of the outer plate 21 so as to wrap around the peripheral edge of the inner plate 23, between the entire peripheral edge of the outer plate 21 and the inner plate 23, the adhesive Since the applied adhesive application part 34a and the adhesive release part 35 to which no adhesive is applied are provided, the pressure release action from the adhesive release part 35 prevents an increase in internal pressure during heating, and the internal pressure It is possible to prevent the adhesive from popping out and to ensure a stable state of the adhesive when the outer plate 21 and the inner plate 23 are integrated by hemming and bonding.

  Since the hemming portion 33 formed on the upper edge portion is formed by folding back and downward, only the hemming portion 33 on the upper edge portion is provided with an adhesive release portion 35 to which no adhesive is applied. This can prevent the intrusion of rainwater.

  By bulging the convex portion 29 with respect to the joint portion 27 formed into the concave shape of the inner plate 23, not only can the strength of the inner plate 23 be improved by the concavo-convex structure, but also provided along the convex portion 29. Since the joined portion 27 is adhered to the outer plate 21 with an adhesive, the strength can be synergistically improved.

  The corner notch groove 36 formed by notching the folded portion of the corner portion of the outer plate 21 can effectively release the internal pressure from the corner notch groove 36 while maintaining the shape of the hemming portion 33, and hemming The strength of the processed portion 33 can be maintained.

  Next, FIG. 13 and FIG. 14 show a second embodiment of the present invention. In short, this embodiment applies the adhesive along only the hemming portion 33 formed on the upper edge portion of the panel. The adhesive application section 34a and the adhesive release section 35 to which no adhesive is applied are alternately provided, and the other structure is the same as that of the embodiment shown in FIGS. Therefore, the same reference numerals are given and the description thereof is omitted. Each of the adhesive release portions 35 to which no adhesive is applied needs to be 30 mm or more in order to release the internal pressure to the outside.

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

It is an inner surface figure showing a 1st 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 the enlarged view to which the IV section of FIG. 1 was expanded. It is the enlarged view to which the V section of FIG. 1 was expanded. It is the enlarged view to which the VI section of FIG. 1 was expanded. It is a perspective view of the inner surface side of a door panel same as the above. 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 an expanded sectional view 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 a top view of the working machine provided with the door panel same as the above. It is an internal view which shows 2nd Embodiment of the door panel which concerns on this invention. It is an enlarged view of the inner surface side of a door panel same as the above. It is a perspective view explaining the outline | summary of a working machine.

Explanation of symbols

20 Door panel
21 Outer plate
22 space
23 Inner plate
27 Joint
29 Convex
33 Hemming section
34a, 34b, 34c, 34d, 34e Adhesive application part
35 Adhesive release part
36 Corner notch

Claims (4)

An outer plate,
An inner plate fixed to the inner surface of the outer plate and forming a space with the outer plate;
A hemming portion formed by folding and crushing the entire periphery of the outer plate so as to wrap around the entire periphery of the inner plate;
An adhesive application portion to which an adhesive is applied and an adhesive release portion to which an adhesive is not applied are provided between the outer peripheral plate and the inner peripheral plate along the hemming processing portion. Door panel. The door release panel according to claim 1, wherein the adhesive release portion is provided only along the hemming portion formed at the upper edge portion. The inner plate
A joint formed into a concave shape and joined to the outer plate;
A bulge-formed convex portion with respect to the joint,
The door panel according to claim 1, wherein the adhesive application portion is provided at the joint portion along the convex portion. The hemming part is
The door panel according to any one of claims 1 to 3, further comprising a corner notch groove formed by notching a folded portion of a corner portion of the outer plate.

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