JP2009133111A - Door panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door panel capable of letting adhesive remain in a flat joint face part without fail to ensure joining force when joining an outer side plate and an inner side plate to each other in the flat face part by using the adhesive. <P>SOLUTION: This door panel is constituted by joining the flat joint face part 27 of the inner side plate 23 with an inner side face of the outer side plate 21 by using the adhesive. A plurality of flat joint face parts 27 are formed and partitioned by columnar adhesive accumulation parts 68 provided in the vertical direction and having recessed cross section. Flat face adhesive accumulation parts 71 having recessed cross section to accumulate the adhesive are provided around the central parts of these flat joint face parts 27. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

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

  FIG. 10 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 by a hinge so as to be opened and closed, and a closed state is maintained by a latch device 18.

As the side door 17 of the work machine, there is a double-structured door panel composed of an outer plate and an inner plate. When manufacturing such a door panel, the bottom surface of the concave portion of the inner plate and the outer plate are joined by an adhesive. They are integrated by force (for example, see Patent Document 1).
JP-A-9-228412 (page 3, FIG. 6-8)

  In this conventional side door, the adhesive surface of the concave portion of the inner plate that is bonded to the outer plate is a flat surface without any unevenness, and the outer plate and the inner plate are overlapped with respect to the application state of the adhesive. Since there is no gap in the design of the joint surface part, the adhesive is pushed out from between the joint surfaces, and the remainder of the adhesive between the joint surfaces decreases, and there is no adhesive in a wide flat area. It is difficult to remain, and it is also difficult to confirm the adhesive residue.

  For example, the residual state of the adhesive is greatly affected by the surface quality of the steel plates of the outer plate and the inner plate, and is unclear. For this reason, there is also a problem that leads to a decrease in the bonding strength of the adhesive to the outer plate at the flat surface portion of the inner plate where no adhesive remains.

  The present invention has been made in view of such points, and when the outer plate and the inner plate are bonded to each other by an adhesive at the flat surface portion, the adhesive can be reliably left on the bonded flat surface portion. An object is to provide a door panel that can secure the force.

  The invention described in claim 1 includes an outer plate and an inner plate fixed to the inner side surface of the outer plate, and the inner plate is bonded to the outer plate with an adhesive on a flat surface. It is a door panel provided with a surface part and a flat surface adhesive reservoir part in which an adhesive having a concave cross section provided around the central part of the joined flat surface part is accumulated.

  According to a second aspect of the present invention, in the door panel according to the first aspect, the plurality of joining flat surface portions are partitioned and arranged in the horizontal direction, and the inner plate is provided between the joining flat surface portions in the vertical direction. A columnar adhesive reservoir having a concave cross section is provided.

  According to the first aspect of the present invention, since the flat surface adhesive reservoir portion having a concave cross section is provided around the central portion of the joint flat surface portion of the inner plate joined to the outer plate by the adhesive, A flat provided centering on the central part of the joint flat surface part for the adhesive to be pushed out between the outer plate and the joint flat surface part of the inner plate when the joint flat surface part of the inner plate is pressed and adhered. The bonding force when the adhesive is cured can be ensured in a well-balanced and sure manner over the entire bonding flat surface portion by remaining in the surface adhesive reservoir evenly and reliably.

  According to the second aspect of the present invention, the columnar adhesive reservoir portion having a concave cross section provided in the longitudinal direction for partitioning and forming a plurality of bonded flat surface portions ensures the bonding force to the outer plate between the bonded flat surface portions. In addition, since the columnar adhesive reservoir functions also as a structural column, the strength against the load in the vertical direction can be improved.

  Hereinafter, the present invention is shown in the first embodiment shown in FIGS. 1 to 6, the second embodiment shown in FIG. 7, the third embodiment shown in FIG. 8, and the FIG. This will be described in detail with reference to the fourth embodiment.

  FIG. 2 shows a hydraulic excavator 10 as a working machine. An upper swing body 12 is turnably provided on a lower traveling body 11, and a cab 13, a work device 14, and a power device 15 such as an engine are mounted on the upper swing body 12. Is installed. The power unit 15 is covered with an upper cover 16, a side door 17, and the like. The side door 17 is attached by a hinge so as to be freely opened and closed, and is kept closed by a latch device.

  FIG. 3 shows a door panel 20 of the side door 17, and this door panel 20 is press-molded in an uneven shape with respect to the outer plate 21 and the outer plate 21, and a concave portion is fixed to the inner side surface of the outer plate 21. An inner plate 23 forming a space 22 between the outer plate 21 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.

  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.

  The foam material 24 is formed by heating and foaming an unfoamed sheet-like foam material 24a affixed to the inner surface of the inner plate 23 in the space 22 between the outer plate 21 and the inner plate 23. 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. 1, the inner plate 23 is formed into a concave flat shape, and is protruded from a plurality of bonded flat surface portions 27 that are bonded to the outer plate 21 with an adhesive on a flat surface, and the body frame. A joint recess 28 that fits with the vibration-preventing convex portion, and a convex portion 29 that is bulged and formed with respect to the joint flat surface portion 27 and the joint concave portion 28 are provided.

  As shown in FIG. 3, the outer plate 21 is a hemming portion 33 that bites and joins the peripheral portion of the inner plate 23 with the peripheral portion formed by folding back and flattening so as to wrap around the peripheral portion of the inner plate 23. It has.

  The peripheral edge portion of the inner plate 23 and each joint flat surface portion 27 are bonded to the outer plate 21 by an adhesive 34, and the outer plate 21 and the inner plate 23 are integrated and sealed by the adhesive 34. The adhesive 34 is preferably a paste-type structural adhesive having viscosity and thermosetting properties.

  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 planar 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 55 for mounting the latch device.

  As shown in FIG. 3, the inner plate 23 has a convex portion 29 bulging out from the joint flat surface 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 portion. The joining flat surface portion 27 of the inner plate 23 is bonded to the outer plate 21 with an adhesive 34. The convex part 29 and the reinforcement deformation | transformation part 56 are formed in endless form along the concave joint flat surface part 27, as FIG. 1 shows.

  The inner plate 23 has a columnar adhesive reservoir portion having an adhesive reservoir space 68s having a concave cross section for accumulating the adhesive 34 as shown in FIG. 5 in a joint flat surface portion 27 adhered to the outer plate 21 by an adhesive 34. As shown in FIG. 1, 68 is provided in the vertical direction, and a plurality of joining flat surface portions 27 are defined through the columnar adhesive reservoir portions 68 and arranged in the horizontal direction.

  As shown in FIG. 1, the inner plate 23 includes a convex portion 29 that is bulged and formed with respect to the joint flat surface portion 27 and the joint concave portion 28, and among the convex portions 29, the inner plate 23 is bonded to the outer plate 21. Projecting reinforcing convex portions 29a are bulged and formed on the upper and lower portions of the joining flat surface portion 27 along the horizontal joining flat surface portion 27, and further reinforced in a concave shape in a direction crossing these reinforcing convex portions 29a. A concave portion 70 is formed.

  Further, each of the bonded flat surface portions 27 is provided with a flat surface adhesive reservoir 71 for storing an adhesive having a concave cross section around the central portion thereof.

  As shown in FIG. 6, each flat surface adhesive reservoir 71 has a cross-shaped pattern in which two linear hollow convex portions intersect each other in an X shape at the center. As shown in FIG. 5, these flat surface adhesive reservoirs 71 have an adhesive reservoir space 71 s having a concave cross section for storing an adhesive, similar to the adhesive reservoir space 68 s of the columnar adhesive reservoir 68.

  Next, effects of the embodiment shown in FIGS. 1 to 6 will be described.

  As shown in FIG. 3, 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 is thicker than the inner plate 23 (the inner plate 23). 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.

  By bulging and forming the convex portion 29 with respect to the joint flat surface portion 27 formed into the concave shape of the inner plate 23, the inner plate 23 has increased rigidity due to the concavo-convex structure even if the inner plate 23 is thinner than the outer plate 21. Thus, the strength can be increased. That is, 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 bulged and formed with respect to the joint flat surface portion 27 closely attached to the outer plate 21. Since the reinforcing deformation portion 56 is formed in a step shape at the intermediate portion of the convex portion 29, the strength can be improved as compared with the case without such a step shape portion, and the strength of the entire door panel can be improved.

  As shown in FIG. 1 and FIG. 6, the flat surface adhesive reservoir 71 having a concave cross section is provided around the center of the joint flat surface portion 27 of the inner plate 23 joined to the outer plate 21 by the adhesive 34. When the bonding flat surface portion 27 of the inner plate 23 is pressed and brought into close contact with the outer plate 21, the adhesive 34 that is about to be extruded from between the outer plate 21 and the bonding flat surface portion 27 of the inner plate 23 is shown in FIG. In the flat surface adhesive reservoir 71 shown in FIG. 1, the adhesive reservoir space 71s allows the bonding flat surface portion 27 to remain evenly and reliably in the four corners, and the bonding force when the adhesive 34 is cured is bonded. The entire flat surface portion 27 can be secured in a well-balanced and reliable manner.

  Further, since the columnar adhesive reservoir 68 having a concave cross section for partitioning and forming the plurality of joint flat surface portions 27 of the inner plate 23 bonded to the outer plate 21 with the adhesive 34 is provided in the vertical direction, the inner plate is provided on the outer plate 21. The adhesive 34 pushed out between the outer plate 21 and the joining flat surface portion 27 of the inner plate 23 remains in the adhesive reservoir space 68s in the columnar adhesive reservoir 68 when the pressure plate 23 is pressed and adhered. When this adhesive 34 is cured, it is possible to secure a bonding force to the outer plate 21 between the respective bonding flat surface portions 27, and the columnar adhesive reservoir portion 68 provided in the vertical direction is used as a side door. Since it is installed in the vertical direction and functions as a structural pillar, the strength against the load in the vertical direction can be improved.

  Next, FIG. 7 shows a second embodiment, and each joint flat surface portion 27 has a concave shape centering on the central portion thereof as in the adhesive reservoir space 71s in the flat surface adhesive reservoir portion 71. Flat surface adhesive reservoirs 72 each having a space for storing an adhesive in a cross section are provided. These flat surface adhesive reservoirs 72 have a pattern in which a plurality of linear hollow protrusions extending in the vertical direction are arranged in parallel in the horizontal direction at regular intervals.

  Next, FIG. 8 shows a third embodiment, and each joint flat surface portion 27 has a concave shape centering on the central portion thereof as in the adhesive reservoir space 71s in the flat surface adhesive reservoir portion 71. Flat surface adhesive reservoirs 73 each having a space in which a cross-sectional adhesive pools are provided. These flat surface adhesive reservoirs 73 have a pattern in which a plurality of linear hollow protrusions extending in the lateral direction are arranged in parallel in the vertical direction with a constant interval.

  Next, FIG. 9 shows a fourth embodiment, in which each flat surface portion 27 has a flat surface adhesive reservoir 74 having a space for storing an adhesive having a concave cross section around the central portion thereof. Each is provided. These flat surface adhesive reservoir portions 74 have a pattern in which a company logo mark is formed into a hollow convex shape.

  The flat surface adhesive reservoirs 71, 72, 73, and 74 in each embodiment may be installed not only by a single pattern on one door panel but also by combining a plurality of patterns on one door panel.

  The present invention is applicable to a door panel of a work machine such as a hydraulic excavator shown in FIG. 2 or FIG.

It is an inner surface figure showing a 1st embodiment of a door panel concerning the present invention. It is a top view of the working machine provided with the door panel same as the above. It is sectional drawing of a door panel same as the above. It is a disassembled perspective view of a door panel same as the above. It is sectional drawing of the columnar adhesive agent reservoir part and flat surface adhesive agent reservoir part of a door panel same as the above. It is a perspective view of the flat surface adhesive agent reservoir part of a door panel same as the above. It is a perspective view of the principal part which shows 2nd Embodiment of a door panel same as the above. It is a perspective view of the principal part which shows 3rd Embodiment of a door panel same as the above. It is a perspective view of the principal part which shows 4th Embodiment of a door panel same as the above. It is a perspective view which shows the outline | summary of a working machine.

Explanation of symbols

21 Outer plate
23 Inner plate
27 Joint flat surface
34 Adhesive
68 Columnar adhesive reservoir
71, 72, 73, 74 Flat surface adhesive reservoir

Claims (2)

An outer plate,
An inner plate fixed to the inner surface of the outer plate,
The inner plate
A joined flat surface portion joined to the outer plate with a flat surface by an adhesive;
A door panel, comprising: a flat surface adhesive reservoir portion for collecting an adhesive having a concave cross section provided around a central portion of the joint flat surface portion. A plurality of joined flat surface portions are partitioned and arranged in the lateral direction,
2. The door panel according to claim 1, wherein the inner plate includes a columnar adhesive reservoir portion having a concave cross section provided in a vertical direction between the respective joined flat surface portions.

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