JP2010043481A - Door panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door panel which can maintain proper sealing performance between a ventilation opening of an outside plate and an unevenly-molded inside plate, and a dust removing screen. <P>SOLUTION: A seal member 93 is stuck along the peripheral edge of the ventilation opening 25 opened in a joint 27 between the outside plate 21 and the rugged molded inside plate 23. The porus metal tabular dust removing screen 71, which is molded in such a shape as to swell to the ventilation opening 25 through the seal member 93 from the inside plate 23, is fixed to the inside plate 23. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a door panel provided with a dust removing screen.

As a door panel structure used for a side door of a working machine such as a hydraulic excavator, a double-structure cover body structure in which an inner plate press-molded to the outer plate is fixed to the inner surface of the outer plate. (For example, refer to Patent Document 1).
JP-A-9-228412 (page 3, FIG. 6-8)

  When a double-structure door panel in which an inner plate press-molded in an uneven shape is fixed to the inner surface of the outer plate is applied to a radiator chamber or the like, a vent opening is provided in the dual-structure cover body. There is a need.

  In that case, although a dust removal screen is installed in the ventilation opening, it is not easy to maintain a good sealing performance between the ventilation opening of the inner plate press-molded in an uneven shape and the dust removal screen.

  The present invention has been made in view of such points, and a door panel that can maintain a good sealing performance between the ventilation opening of the inner plate and the dust-removing screen formed in an uneven shape with respect to the outer plate. The purpose is to provide.

  The invention described in claim 1 includes an outer plate, an inner plate having a joint formed on the outer plate in a concavo-convex shape and joined to the inner surface of the outer plate, and an air vent that is opened in the joint. An opening, a dust removal screen formed by a porous metal plate provided in the ventilation opening, and a seal that is attached to the inner plate along the periphery of the ventilation opening and seals between the dust removal screen and the inner plate The dust removal screen is a door panel that is formed in a shape that bulges from the inner plate through the sealing member to the ventilation opening and is fixed to the inner plate.

  According to a second aspect of the present invention, the seal member in the door panel according to the first aspect comprises a seal body having water repellency and a protective film provided on a contact surface between the dust screen of the seal body. is there.

  According to a third aspect of the present invention, the dust removing screen in the door panel according to the first or second aspect is a punching metal in which a ventilation hole having a hole diameter of 1 mm to 5 mm is formed in a metal sheet having a thickness of 1 mm or less. is there.

  According to a fourth aspect of the present invention, the dust removing screen in the door panel according to any one of the first to third aspects includes a plurality of positioning deformation portions, and the inner plate is fitted with each of the positioning deformation portions. The dust removing screen positioning deformation portion is provided.

  According to a fifth aspect of the present invention, a plurality of the dust removing screens in the door panel according to any one of the first to fourth aspects are formed by cutting in a direction opposite to each other at the one side edge and the other side edge on the opposite side. The inner plate is provided with a plurality of stud bolts inserted into the respective fixing grooves of the dust removing screen, and provided with nuts that are screwed into the respective stud bolts to fix the dust removing screen. .

  According to the first aspect of the present invention, in the door panel including the outer plate and the inner plate having the ventilation openings, the dust removing screen is attached to the inner plate from the inner plate along the periphery of the ventilation openings. The seal member is molded into a shape that swells to the ventilation opening, so that the seal pressure is applied evenly from the dust screen to the seal member on the entire periphery, and the inside of the door panel from the gap between the inner plate and the dust screen. It is possible to maintain a good sealing performance that prevents dust from entering. In addition, since the dust removal screen fixed to the inner plate is a porous metal plate formed into a shape that bulges into the opening for ventilation, even if this dust removal screen is made thin, the bulge shape provides a constant resistance against deformation. Can maintain strength. Further, the dust removing screen is fitted while the bulging portion of the dust removing screen is fitted into the ventilation openings of the inner and outer plates, and the metal touch between the dust removing screen and the inner plate is prevented by the sealing member. Can be easily attached to the opening for ventilation.

  According to the invention described in claim 2, the seal body having water repellency prevents the seal body from absorbing and holding moisture that causes metal rust, and prevents the inner plate and the like from being rusted. In addition, the protective film provided on the contact surface of the seal main body with the dust removing screen can prevent the porous dust removing screen from scraping the seal main body, thereby improving the durability of the seal member.

  According to the invention described in claim 3, it is possible to manufacture a punching metal in which a vent hole having a hole diameter of 1 mm to 5 mm is formed if the metal sheet has a thickness of 1 mm or less. According to the punching metal, there is a certain effect in removing dust in the air.

  According to the invention described in claim 4, the dust removing screen can be easily formed into the ventilation opening by fitting the plurality of positioning deforming portions of the dust removing screen to the plurality of dust removing screen positioning deforming portions of the inner plate. And it can position correctly and can improve workability and work accuracy at the time of assembly of a dust removal screen.

  According to the invention described in claim 5, the plurality of fixing grooves formed on the one side edge of the dust removing screen are inserted into the corresponding stud bolts of the inner plate from one end and pressed against the inner plate. The other side edge of the dust removal screen is pressed against the inner plate with the shaft or support as an axis or support, so that a plurality of fixing grooves formed in the other side edge of the dust removal screen are inserted into the corresponding stud bolts on the inner plate. The dust removal screen can be easily fixed to the inner plate by the nut screwed to each stud bolt, and the workability at the time of fixing the dust removal screen can be improved.

  Hereinafter, the present invention will be described in detail with reference to one embodiment shown in FIGS. 1 to 14 and another embodiment shown in FIGS. 15 to 17.

  FIG. 11 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.

  FIG. 12 shows a side door 17 provided in the radiator chamber. This side door 17 is attached to a frame on the airframe side by hinges 53 and 54, which will be described later, and by a latch device 19r attached to the opposite side, The closed state is maintained.

  The side door 17 is configured such that the dust removing screen 71 shown in FIG. 14 is detachably attached to the back surface of the door panel 20 shown in FIG. 13, and the details thereof will be described below.

  FIG. 1 shows a door panel 20 of a side door 17. The door panel 20 is formed by pressing the outer plate 21 and the outer plate 21 in a concavo-convex shape so that a concave portion is joined to the inner side surface of the outer plate 21 and is convex. 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. As shown in FIG. 13, three rows of ventilation openings 25 are opened in the joint portion 27 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 foamed by heating an unfoamed sheet-like foam material affixed to the inner surface of the outer plate 21 or the inner plate 23 in the space 22 between the outer plate 21 and the inner plate 23, Mold. The foam material is preferably 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 simultaneously with the baking coating using a baking oven for baking coating.

  As shown in FIG. 1, the inner plate 23 includes an opening-side joint portion 27 and an outer peripheral-side joint portion 28 that are joined to the outer plate 21, and convex portions that are bulged with respect to the joint portions 27 and 28. Part 29.

  As shown in FIG. 2, the convex portion 29 of the inner plate 23 is composed of a reinforcing plate housing convex portion 29a on the hinge mounting side and a thick horizontal beam formed in the lateral direction from the top, third to bottom from the top. A reinforcing convex portion 29b having a shape, a reinforcing convex portion 29c having a small cross section formed in the second horizontal direction from above, and a reinforcing convex portion 29d on the latch mounting side.

  On the thick horizontal beam-shaped reinforcing convex portion 29b, a reinforcing concave portion 30 which is concave in the vertical direction is formed. The reinforcing convex portion 29c having a small cross section is formed to be narrower and lower than the reinforcing convex portion 29b in order to secure the opening area of the ventilation opening portion 25, and the reinforcing concave portion 30 of the reinforcing convex portion 29b is formed. Absent.

  The joint portion 27 of the inner plate 23 has a vent opening 25b slightly larger than the vent openings 25a of the outer plate 21 corresponding to the three rows of vent openings 25a opened in the outer plate 21. Each is provided by drilling.

  As shown in FIG. 1, the outer peripheral edge of the outer plate 21 is bitten and joined to the peripheral edge of the inner plate 23 by a hemming portion 33 formed by folding and flattening so as to wrap around the peripheral edge of the inner plate 23. To do. The joint portions 27 and 28 of the inner plate 23 are adhered to the outer plate 21 by an adhesive 34, and the outer plate 21 and the joint portions 27 and 28 of the inner plate 23 are joined and sealed by the adhesive 34. The adhesive 34 is preferably a paste-type structural adhesive having viscosity and thermosetting properties.

  As shown in FIG. 4, an inner plate for hinge mounting is arranged so as to be 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. A reinforcing plate 41 is fixed.

  As shown in FIG. 2, the inner reinforcing plate 41 is provided with an elongated concave reinforcing portion 42 at the center, and the hinge mounting convex portions 43 and 44 are planar on one end side and the other end side of the concave reinforcing portion 42, respectively. A plurality of bolt insertion holes 43h and 44h are formed in the hinge mounting convex portions 43 and 44, respectively, and reinforcing concave portions 43c and 44c are provided around the hinge mounting convex portions 43 and 44, respectively. In addition, one positioning fitting portion 45 between the two bolt insertion holes 43h and 43h and between the two bolt insertion holes 44h and 44h in the center of each hinge mounting convex portion 43 and 44, and The other positioning fitting portion 46 is formed in a concave shape.

  With respect to the inner reinforcing plate 41, as shown in FIG. 2, the central portion of the reinforcing plate housing convex portion 29a on the hinge mounting side of the inner plate 23 has a concave shape fitted to the concave reinforcing portion 42 of the inner reinforcing plate 41. Reinforcing portions 47 are provided in an elongated shape, and hinge mounting surface portions 48 and 49 are respectively formed in a flat shape on one end side and the other end side of the concave reinforcing portion 47, and a plurality of bolt insertion holes 48h are formed in these hinge mounting surface portions 48 and 49. , 49h are drilled, and reinforcing groove portions 48c, 49c are provided around the hinge mounting surface portions 48, 49, respectively, and two bolts are provided at the center of each hinge mounting surface portion 48, 49. Between the insertion holes 48h and 48h and between the two bolt insertion holes 49h and 49h, one positioning fitting portion 51 and the other positioning fitting portion 52 are each formed in a convex shape protruding downward. .

  Then, positioning fitting portions 51 and 52 provided on the hinge mounting surface portions 48 and 49 of the inner plate 23 and positioning fitting portions 45 and 46 provided on the hinge mounting convex portions 43 and 44 of the internal reinforcing plate 41. Are fitted to each other to position the inner reinforcing plate 41 with respect to the inner plate 23. By this positioning, the concave reinforcing portion 42 of the inner reinforcing plate 41 and the concave reinforcing portion 47 of the inner plate 23 are fitted, and the bolt insertion holes 43h and 44h of the inner reinforcing plate 41 and the bolt insertion hole 48h of the inner plate 23 are fitted. , 49h is accurately positioned.

  As shown in FIG. 2, hinges 53 and 54 having a plurality of bolt insertion holes 53 h and 54 h are brought into contact with the hinge mounting surface portions 48 and 49 of the inner plate 23. These hinges 53 and 54 are pivotally connected to one side plate fixed on the hinge mounting surface portions 48 and 49 of the inner side plate 23 by a shaft member. An attachment hole for inserting a bolt for attaching the side door 17 to the body frame side is formed in the plate.

  Then, the bolts 55b inserted into the bolt insertion holes 53h and 54h of the hinges 53 and 54 are passed through the bolt insertion holes 48h and 49h of the inner plate 23, and the bolt insertion holes of the hinge mounting convex portions 43 and 44 of the internal reinforcing plate 41 are inserted. The hinges 53 and 54 are attached by screwing and tightening nuts (not shown) welded to the back surfaces of 43h and 44h, respectively.

  As shown in FIG. 1, the inner plate 23 is formed with a step-shaped reinforcing deformation portion 56 in the middle portion of the convex portion 29 bulging and formed along the joint portions 27 and 28 closely attached to the outer plate 21. The step-shaped reinforcing deformation portion 56 ensures a sufficient height of the convex portion 29 with respect to the outer plate 21 and also ensures strength.

  In particular, the thick horizontal beam-shaped reinforcing convex portion 29b is excellent in cross-sectional performance such as a secondary moment of section due to the reinforcing deformable portion 56 and the reinforcing concave portion 30, and has a characteristic that it is difficult to be deformed against bending stress.

  On the other hand, the reinforcing convex portion 29c having a small cross section is formed to have a smaller width than the reinforcing convex portion 29b, so that the opening area of the ventilation opening portion 25 can be formed large, and the reinforcing plate on the hinge mounting side Since it is formed lower than the projecting portion 57 at a location where it is connected to the storage convex portion 29a and the reinforcing convex portion 29d on the latch mounting side, it can be easily drawn.

  As shown in FIG. 12, the upper portion of the door panel 20 is bent toward the fuselage side with respect to the substantially vertical portion below the door panel 20. Wrinkles are likely to occur at the upper portions of the plate housing convex portion 29a and the reinforcing convex portion 29d on the latch mounting side. Therefore, as shown in FIGS. 2 and 3, the reinforcing plate housing convex portion 29a on the hinge mounting side of the inner plate 23 and the reinforcing convex portion 29d on the latch mounting side are bent at the place where the bending processing is performed. Wrinkle prevention recesses 58 and 59 for preventing wrinkles are formed.

  As shown in FIG. 2, the inner reinforcing plate 41 is also formed with a recess 60 that fits with one wrinkle generation preventing recess 58 of the inner plate 23 to prevent interference with the wrinkle generation preventing recess 58.

  As shown in FIGS. 2 and 3, the reinforcing convex portion 29d located below the other wrinkle generation preventing concave portion 59 of the inner plate 23 is provided with damping concave portions 61 and 62 and a latch mounting hole 63. ing. These vibration-suppressing recesses 61 and 62 are used for preventing vibration of the door panel 20, and as shown in FIG. 12, the vibration-suppressing recesses 61 and 62 of the door panel 20 in the closed state are attached to the body-side frame. A convex part (not shown) can be fitted to suppress the vertical vibration of the door panel 20.

  As shown in FIGS. 1 to 4, a dust removing screen 71 formed of a porous metal plate fixed to the inner plate 23 is formed in the ventilation opening 25 a of the outer plate 21 and the ventilation opening 25 b of the inner plate 23. Is provided. As shown in FIGS. 5, 6, and 8, a large number of small round hole-shaped or honeycomb core-shaped vent holes 72 are perforated in the dust removing screen 71.

  The dust removal screen 71 may be a commercially available punching metal in which the vent holes 72 are perforated in the entire region, or the outer plate 21 may be processed by a processing machine such as press punching, drilling, electric discharge machining, or laser machining. Alternatively, a vent hole 72 may be formed in a region corresponding to the vent opening 25 of the inner plate 23. When this dust removing screen 71 is formed by punching metal, vent holes 72 having a hole diameter of 1.0 mm to 5.0 mm are formed on a metal sheet having a plate thickness of 1.0 mm or less and a pitch between holes of about 1/3 of the hole diameter. What was drilled in is desirable.

  As shown in FIGS. 2, 3, and 5, the dust removing screen 71 includes an uppermost end fixing portion 73 fixed to the uppermost reinforcing convex portion 29 b of the inner plate 23, and an uppermost ventilation portion of the door panel 20. The uppermost bulge forming part 74 bulged in the opening 25, the intermediate fixing part 75 fitted on the second-stage reinforcing convex part 29c from the upper side of the inner plate 23, and the middle part of the door panel 20 for ventilation A middle bulging molded portion 76 that bulges into the opening 25, an intermediate fixing portion 77 that is fitted onto the third-stage reinforcing convex portion 29b from above the inner plate 23, and a vent for the lowermost step of the door panel 20. A lowermost bulge forming portion 78 bulged in the opening 25 and a lowermost end fixing portion 79 fixed to the lowermost reinforcing convex portion 29b of the inner plate 23 are provided.

  Small ridges 80 are formed in the bulge forming portions 74, 76, 78 of the dust removing screen 71 so that two rows correspond to the vent openings 25 of the door panel 20. These protrusions 80 can enlarge the filtration area of the dust removing screen 71 as compared with the case of a flat surface.

  As shown in FIG. 2 and FIG. 3, the left and right ends of each bulge forming portion 74, 76, 78 are engaged with the inclined portions of the reinforcing plate housing convex portion 29a and the reinforcing convex portion 29d of the inner plate 23. The flange-shaped portions 81 are integrally formed, and notches 82 are formed in the upper and lower portions of the flange-shaped portions 81, respectively. By providing these notches 82, it is possible to prevent interference with the corners of the ventilation openings 25b of the inner plate 23 and to prevent excessive dusting of the dust removing screen 71.

  As shown in FIG. 2, the uppermost end fixing portion 73 and the lowermost end fixing portion 79 as one side edge portion and the other side edge portion on the opposite side of the dust removing screen 71 have a plurality of fixing grooves in mutually facing directions. 83 and 84 are respectively formed with cuts. Furthermore, a plurality of fixing holes 85 and 86 are formed in the intermediate fixing portions 75 and 77, respectively.

  The height of the second intermediate fixing portion 75 from above the dust removing screen 71 is lower than the protrusions 57 formed at both ends of the second-stage reinforcing convex portion 29c from above the inner plate 23. Accordingly, it is formed lower than the end portion 87 that covers the protruding portion 57. A plurality of positioning deformation portions 88 having recesses toward the inner plate 23 are integrally formed with the fixing holes 85 in the intermediate fixing portion 75 of the dust removing screen 71.

  On the other hand, the reinforcing convex portions 29b and the reinforcing convex portions 29c of the inner plate 23 from the uppermost stage to the lowermost stage are inserted into the fixing grooves 83 and 84 and the fixing holes 85 and 86 of the dust removing screen 71, respectively. A plurality of stud bolts 91 are integrally attached in advance by stud welding.

  Further, as shown in FIG. 2 and FIG. 10, the second-stage reinforcing convex portion 29 c of the inner plate 23 has a plurality of convex dust removal fittings fitted with the plurality of positioning deformation portions 88 of the dust removing screen 71. A screen positioning deformation portion 92 is integrally formed.

  As shown in FIGS. 1, 4, and 7, a seal member 93 is affixed along the periphery of each ventilation opening 25 b of the inner plate 23, and the seal member 93 allows the dust removal screen 71 and the inner plate 23 to be separated from each other. The gap between the peripheries of the ventilation openings 25b is sealed.

  As shown in FIG. 7, the seal member 93 includes a seal body 94 having water repellency and a protective film 95 provided on a contact surface of the seal body 94 with the dust removing screen 71. As the seal body 94, an EPDM foam seal material obtained by polymerizing ethylene, propylene, and butadienes is desirable, and is excellent in weather resistance, heat aging resistance, and the like. The protective film 95 is desirably a polyethylene terephthalate (PET) film, which is relatively durable and resistant to heat.

  As shown in FIG. 7, each of the bulging molded portions 74, 76, 78 of the dust removing screen 71 is formed on the outer plate 21 from the ventilation opening 25b of the inner plate 23 bonded to the outer plate 21 with an adhesive 34a. It is formed in a shape that bulges out to the ventilation opening 25a. In other words, each bulge forming portion 74, 76, 78 of the dust removing screen 71 slightly protrudes from the outer surface of the outer plate 21. For this reason, the gap between the dust removing screen 71 and the outer plate 21 can be reduced.

  As shown in FIGS. 8 and 9, the upper and lower edge portions of the dust removing screen 71 are continuously formed by a hem bending portion 96 that is folded and crushed on a line that does not hang on the vent hole 72. The vent hole 72 is prevented from being serrated by folding back at the vent hole 72.

  Next, the manufacturing process of the side door 17 will be described.

  The outer plate 21 and the inner plate 23 are integrated by a hemming portion 33 through an internal reinforcing plate 41 and are bonded and integrated by a thermosetting adhesive 34.

  A dust removing screen 71 is attached to the inner plate 23. The dust removing screen 71 is attached by first inserting the fixing groove 83 or 84 at the corresponding one side edge of the dust removing screen 71 into either the uppermost or lowermost stud bolt 91 of the inner plate 23 and the inner plate. 23, and the other side edge of the dust removal screen 71 opposite to the inner plate 23 is pressed against the inner plate 23 with the shaft or support as a shaft or support, thereby fixing a plurality of fixing grooves 84 formed in the other side edge of the dust removal screen 71 or 83 is fitted to the corresponding stud bolt 91 of the inner plate 23, and the fixing holes 85 and 86 drilled in the intermediate portion of the dust removing screen 71 are fitted to the corresponding stud bolt 91 of the inner plate 23. .

  At this time, there is a slight gap between the fixing grooves 83 and 84 and the fixing holes 85 and 86 of the dust removing screen 71 and the corresponding stud bolts 91 of the inner plate 23, and these can be smoothly fitted. However, the alignment is not accurate. Therefore, as shown in FIG. 10, the plurality of positioning deformation portions 88 of the dust removal screen 71 are replaced with the plurality of convex dust removal screen positioning deformations provided on the second-stage reinforcing protrusions 29 c of the inner plate 23. The dust removing screen 71 is accurately positioned by being fitted to the portion 92, and the dust removing screen 71 is fixed by the nuts 97 screwed into the respective stud bolts 91 as shown in FIG.

  Next, the operational effects obtained from the above embodiment will be described.

  A dust removal screen 71 in which minute ventilation holes 72 are perforated in the region corresponding to the ventilation opening 25 of the door panel 20 and the bulging molded parts 74, 76, 78 and the protrusions 80 are repeatedly formed is provided on the inner plate. 23, the small holes can be easily formed in the door panel 20 through the dust removing screen 71, compared with the case where the small holes are directly processed in the outer plate 21, and the bulging molded parts 74, 76, 78 The plurality of protrusions 80 can increase the rigidity of the dust removing screen 71 and ensure the strength and secure the necessary filtration area even when using a thin metal plate necessary for processing the small air holes 72.

  That is, even with a processing machine that cannot process into the large outer plate 21, the dust removal screen 71 has countless fine ventilation holes 72 that can catch the scattered dust without sucking it. By reinforcing the rigidity of the dust removing screen 71 by making irregularities on the plate that has been subjected to extremely small hole processing in advance, by attaching this to the ventilation opening 25 of the inner plate 23 from the back side, Sufficient ventilation performance and rigidity can be obtained.

  In a double-structure door panel 20 comprising an outer plate 21 and an inner plate 23 having a ventilation opening 25, a dust removing screen 71 is pasted from the inner plate 23 along the periphery of the ventilation opening 25b of the inner plate 23. Since the sealing member 93 is formed into a shape that bulges into the ventilation opening 25a of the outer plate 21, the sealing pressure acts evenly on the sealing member 93 on the entire periphery from the dust removing screen 71, and the inner plate It is possible to maintain a good sealing performance that prevents dust from entering the inside of the door panel from the gap between 23 and the dust removing screen 71.

  In the double-structure door panel 20 including the outer plate 21 and the inner plate 23 having the ventilation opening 25, the dust removing screen 71 fixed to the inner plate 23 is connected to the outer plate 21 from the ventilation opening 25 b of the inner plate 23. Since it is a perforated metal plate formed into a shape that bulges into the opening 25a for ventilation, even if the dust removing screen 71 is made thin in order to make the hole diameter of the ventilation hole 72 smaller, the bulging shape prevents the deformation. The dust removing screen 71 can be easily attached to the vent opening 25 while maintaining a certain strength and fitting the bulging portion of the dust remove screen 71 into the vent openings 25 of the inner plate 23 and the outer plate 21. be able to.

  The seal member 93 affixed along the periphery of the ventilation opening 25b of the inner plate 23 seals between the dust removing screen 71 and the periphery of the ventilation opening 25b of the inner plate 23. In addition to the original sealing effect, the metal touch between the dust screen 71 and the inner plate 23 can be prevented, and the dust screen 71 can be attached to the inner plate 23 without considering the metal touch that may cause rust from the damaged part. It can be easily attached to the ventilation opening 25b.

  The seal member 93 has a water-repellent seal body 94 that prevents the seal body 94 from absorbing and retaining moisture that causes metal rust, and prevents the inner plate 23 and the like from being rusted. The protective film 95 provided on the contact surface side of the seal body 94 with the dust removal screen 71 can prevent the porous dust removal screen 71 from scraping the seal body 94 like a flaw and improve the durability of the seal member 93. It can be improved.

  If the dust removing screen 71 is a metal sheet having a thickness of 1 mm or less, it is possible to manufacture a punching metal having a vent hole 72 having a hole diameter of 1 mm to 5 mm. According to the punching metal having this hole diameter, There is a certain effect in removing dust in the air.

  By fitting the plurality of positioning deformation portions 88 of the dust removal screen 71 to the plurality of dust removal screen positioning deformation portions 92 of the inner plate 23, the dust removal screen 71 can be easily and accurately placed in the ventilation opening 25b of the inner plate 23. Therefore, the workability and work accuracy when the dust removing screen 71 is assembled can be improved.

  A plurality of fixing grooves 83 or 84 formed by cutting one side edge of the dust removing screen 71 are inserted into the corresponding stud bolts 91 of the inner plate 23 from one end and pressed against the inner plate 23 to support or support them. By pressing the other side edge of the dust removing screen 71 opposite to the inner side plate 23, a plurality of fixing grooves 84 or 83 formed by cutting in the other side edge of the dust removing screen 71 correspond to the inner side plate 23. The dust removal screen 71 can be easily fitted to the stud bolt 91, and the dust removal screen 71 can be easily fixed to the ventilation opening 25b of the inner plate 23 by the nut 97 screwed to each stud bolt 91. Can be improved.

  Next, FIGS. 15 to 17 show another embodiment, in which the overall panel height of the door panel 20 is increased, and the door panel 20 is provided with four rows of ventilation openings 25. Further, as shown in FIG. 16, the thick reinforcing convex portion 29b having the concave reinforcing concave portion 30 in the inner plate 23 is provided only in the uppermost step and the lowermost step, and the second step, the third step, The fourth-stage transverse beam portion is composed of a reinforcing convex portion 29c having a small cross section.

  Accordingly, as shown in FIG. 17, the three-stage intermediate fixing portions 75a, 75b, 75c of the dust removing screen 71 are the second, third, and fourth-stage reinforcing convex portions of the inner plate 23. In accordance with the height of the portion formed lower than the protruding portion 57 formed at both end portions of 29c, it is formed lower than the end portion 87 covering the protruding portion 57. Four positioning deformation portions 88 are integrally formed with the fixing holes 85 in the two-stage intermediate fixing portions 75a and 75c of the dust removing screen 71.

  On the other hand, as shown in FIG. 16, the four convex dust removal fittings with the four positioning deforming portions 88 on the reinforcing convex portions 29 c of the second step and the fourth step of the small cross section of the inner plate 23. A screen positioning deformation portion 92 is integrally formed. Since other structures and operational effects are the same as those of the above-described embodiment, description thereof is omitted.

  The present invention is a door panel that can be used for a side door of a working machine such as a hydraulic excavator, a loader, or a bulldozer, such as a radiator room, a battery room, or a pump room.

It is sectional drawing which shows one Embodiment of the door panel which concerns on this invention. It is a disassembled perspective view of a door panel same as the above. It is an inner surface figure of a door panel same as the above. It is the IV-IV sectional view taken on the line of FIG. It is longitudinal direction sectional drawing which shows the whole dust removal screen of a door panel same as the above. It is a perspective view which expands and shows a part of dust removal screen of a door panel same as the above. It is sectional drawing which shows the mounting state of the sealing member of a door panel same as the above. It is an enlarged front view which shows the edge part of the dust removal screen of a door panel same as the above. It is the IX-IX sectional view taken on the line of FIG. It is sectional drawing which shows the dust removal screen positioning 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 a perspective view of the location which attached the door panel same as the above to the working machine. It is an inner surface figure which shows the state which removed the dust removal screen from the door panel same as the above. It is a front view which shows only the dust removal screen of a door panel same as the above. It is a perspective view which shows the state which attached other embodiment of the door panel same as the above to the working machine. FIG. 16 is an internal view showing a state where a dust removing screen is removed from the door panel shown in FIG. 15. It is a front view which shows only the dust removal screen of the door panel shown by FIG.

Explanation of symbols

20 Door panel
21 Outer plate
23 Inner plate
25 Ventilation opening
27 Joint
71 dust removal screen
72 Ventilation holes
83, 84 Fixed groove
88 Deformation part for positioning
91 Stud bolt
92 Deformation screen positioning deformation
93 Seal member
94 Seal body
95 Protective film
97 nut

Claims (5)

An outer plate,
An inner plate having a joint formed on the outer plate in an uneven shape and joined to the inner surface of the outer plate;
A ventilation opening opened at the joint; and
A dust removing screen formed by a porous metal plate provided in the opening for ventilation;
Affixed to the inner plate along the periphery of the ventilation opening, and a seal member that seals between the dust removing screen and the inner plate;
The dust removal screen
A door panel formed from an inner plate through a sealing member into a vent opening and fixed to the inner plate. The seal member
A seal body having water repellency;
The door panel according to claim 1, further comprising: a protective film provided on a contact surface of the seal body with the dust removing screen. The door panel according to claim 1 or 2, wherein the dust removing screen is a punching metal in which a ventilation hole having a hole diameter of 1 mm to 5 mm is formed in a metal sheet having a thickness of 1 mm or less. The dust removal screen includes a plurality of positioning deformation portions,
The door panel according to any one of claims 1 to 3, wherein the inner plate includes a plurality of dust-removing screen positioning deformation portions that respectively fit with the positioning deformation portions. The dust removing screen is provided with a plurality of fixing grooves each formed by cutting in a direction opposite to each other on one side edge and the other side edge on the opposite side,
The inner plate includes a plurality of stud bolts that are inserted into the respective fixing grooves of the dust removing screen,
The door panel according to any one of claims 1 to 4, further comprising a nut that is screwed to each stud bolt to fix the dust removal screen.

Images