JP5138326B2 - Weather strip structure with sub-seal member for construction machinery - Google Patents

Description

The present invention relates to a weather strip structure provided with a sub seal member of a construction machine that is attached around an opening of a door of a construction machine such as a special vehicle and seals the outer periphery of the door when the door is closed.

One example of this type of conventional technology is a weather strip configuration example shown in FIG.
Explaining this, a door weather strip 7 that elastically contacts the vehicle body panel 4 when the door is closed is disposed on the door outer periphery 1 of the door over the entire periphery or from the door lower side 1a to the door vertical side (not shown). In addition, a sub seal 8 that elastically contacts a side sill as the vehicle body panel 4 when the door is closed is disposed on the door outer peripheral side of the door weather strip 7 only in a portion along the door lower side portion 1 a in the door outer peripheral portion 1. . That is, in the door lower side 1a, the gap with the vehicle body panel, that is, the side sill 4 is double-sealed to locally improve the sealability and sound insulation of this portion. The door weather strip 7 is formed by extruding a portion along the door lower side 1a and the door vertical side (not shown) into a substantially uniform cross-sectional shape, and a portion attached to the door corner (not shown) is molded. Finally, each part is integrally formed of a rubber material. FIG. 4 shows a cross-sectional shape of a portion along the door lower side 1a. In the door outer peripheral portion 1, the door inner panel 2 and the door outer panel 3 are hemmed to each other at the flange portion. The door weather strip 7 is attached to the substantially flat attachment portion 5 of the door inner panel 2 by a plurality of clips 9 at appropriate intervals along the longitudinal direction. That is, attachment holes 11 and 12 through which the clip 9 is inserted and fitted are formed in the attachment portion 5 and the thin attachment wall portion 10 of the door weather strip 7 along the attachment portion 5. Further, the door weather strip 7 is elastically contacted with a flat back portion 6 that is curved and extends substantially perpendicularly from the mounting portion 5 of the door inner panel 2 in addition to the hollow seal portion 13 that is actually elastically contacted with the vehicle body panel 4 when the door is closed. A back lip portion 14 is formed.
The door weather strip 7 is integrally formed with a fitting portion 15 into which the sub seal 8 is fitted. The fitting portion 15 is formed so as to protrude substantially parallel to the back portion 6 from the space between the hollow seal portion 13 and the back lip portion 14 toward the outer peripheral side of the door. . The fitting portion 15 is formed of a relatively hard solid rubber material so that the sub seal 8 can be favorably supported. On the other hand, the other hollow seal portion 13 and the like are formed of a relatively soft sponge rubber material in consideration of a reaction force at the time of elastic contact.

Another example of the prior art is a configuration example of the weather strip 16 shown in FIG.
Explaining this, the weatherstrip 16 has a fixed surface 18 formed along the peripheral edge of the door panel 17 of the automobile, a base 19 of the weather strip 16 and a highly foamed sponge having an apparent specific gravity of 0.1 to 0.3. The rubber 21 is attached. Further, the hollow seal portion 22 is elastically contacted with the body panel 23, and the sub seal portion 24 is elastically contacted with the door panel 17. Further, in this sealing structure, a sub-seal weather strip 26 formed separately from the weather strip 16 is pasted with an adhesive tape 27 on a mounting surface 25 formed stepwise on the roof side portion of the door panel 17 directly above the fixed surface 18. I wear it. The lip portion 28 is in elastic contact with the parting portion 29 of the body panel 23. A glass run 31 that elastically contacts the door glass 30 and ensures sealing performance is provided below the seal structure.
Japanese Patent Laid-Open No. 2003-136969 Japanese Patent Laid-Open No. 2001-287549

Since the conventional technique has the above-described configuration, the following problems existed.
That is, according to one example of the prior art shown in FIG. 4, the fitting portion 15 of the door weather strip 7 and the sub seal 8 are combined, but there is a possibility that they may be separated and separated during the operation, thereby improving the quality of the sealing performance. There was a problem that there was a problem and that the structure was complicated and there was a bottleneck in mass productivity.
Further, according to another conventional example shown in FIG. 5, it is necessary to interpose the highly foamed sponge rubber 21 on the lower surface of the sub-seal 24 of the weather strip 16, the number of parts increases, the overall configuration is complicated, and mass production is required. There was a problem of inferiority.

The structure of a weather strip provided with a sub-seal member for a construction machine according to the present invention is for the purpose of solving the above-described problems, and is composed of the following configurations and means.

According to the first aspect of the present invention, in the structure of the weather strip that is mounted around the door opening of the construction machine and seals the outer periphery of the door, the weather strip is attached to the entire periphery of the door of the construction machine and the EPDM. A main weather strip for construction machines molded with rubber or an ethylene propylene diene monomer terpolymer and formed with acute-angled leg portions on the left and right sides of the lower surface, and the construction machine spaced apart from the main weather strip for construction machines A sub-seal member made of a hard material attached to the entire periphery of the door or a part of the door, and the main weather strip for the construction machine has a width substantially equal to the thickness of the first hollow portion and the clip head. The second hollow portion is molded, and the clip is pressed and accommodated in the second hollow portion by a partition wall between the first and second hollow portions. The sub-lip in a substantially cylindrical outer peripheral surface on said construction machine for main weather strip projecting molded fixes the E-user strip construction machine door, further wherein the sub seal member is a cross-sectional shape substantially L-shaped, An upright portion having a tip portion made of an elastic body that forms an inclined surface toward the outer side F of the door of the construction machine, and a position that hangs down from the tip portion to 1/3 of the total length The sub seal member is a thin sub lip that is formed so as to project in a direction substantially perpendicular to the standing portion and in a short direction, and the sub seal member has the bottom at the upper edge of the roof side of the door of the construction machine and the left edge of the front pillar side. And a double-sided adhesive tape only on the rear pillar side.

The structure of the weather strip provided with the sub-seal member for the construction machine according to the present invention has the following effect because it has the above-described configuration.

That is, according to the first aspect of the present invention, in the structure of the weather strip that is attached around the door opening of the construction machine and seals the outer periphery of the door, the weather strip is attached to the entire periphery of the door of the construction machine. And a main weather strip for a construction machine, which is molded from EPDM rubber or an ethylene propylene diene monomer terpolymer, and has an acute-angle leg on the left and right sides of the lower surface, and the main weather strip for the construction machine spaced apart from the main weather strip. A sub-seal member made of a hard material attached to the entire periphery of the door of the construction machine or a part thereof; and the main weather strip for the construction machine has a vertical direction substantially the same as the thickness of the first hollow part and the clip head A second long hollow portion is formed, and the clip is pressed and accommodated in the second hollow portion by a partition wall between the first and second hollow portions. The main weather strip for machine is fixed to the door of the construction machine, and a sub lip is formed on the substantially cylindrical outer peripheral surface of the main weather strip for construction machine, and the sub seal member has a substantially L-shaped cross section. A standing portion having a tip portion formed of an elastic body that forms an inclined surface toward the outer side F of the door of the construction machine, and a position that hangs down from the tip portion to 1/3 of the total length The sub seal member has a thin sub lip formed so as to project in a direction substantially perpendicular to the upright portion and short , and the sub seal member has a bottom portion on the upper edge of the roof side of the opening portion of the door of the construction machine, on the front pillar side. A weather strip structure having a sub-seal member for a construction machine, characterized in that the double-sided adhesive tape is attached only to the left edge and the rear pillar side.
With such a configuration, when the door of the construction machine is closed, the substantially cylindrical outer peripheral surface of the main weather strip body at a position away from the sub lip can be reliably deformed. In particular, since the main weather strip of construction machinery is molded from EPDM rubber or ethylene propylene diene monomer terpolymer, it can be deformed on the same line without kinking, ensuring reliable sealing performance over a long period of time. The sub-seal member has a substantially L-shaped cross section, and has a tip portion formed of an elastic body that can be bent and forms an inclined surface toward the outer side F of the door of the construction machine. A standing subportion, and a thin sub-lip that is formed so as to project in a substantially perpendicular direction to the standing portion at a position that hangs down to 1/3 of the total length from the tip,
The sub-seal member rubs the surface of the main body (body) of the construction machine first, and then the sub lip rubs in the direction of arrow F, so the tip of the sub-seal member adheres to the surface of the main body (body) of the construction machine. Has the effect of completely pushing out in the direction of arrow F, and reliably preventing rainwater containing a large amount of mud and dust from flowing into the room. Further, since the sub seal member comes into contact with the front end portion of the sub seal member and the sub lip on the surface of the main body of the construction machine, the contact area is increased and the confidentiality is improved. Therefore, even if the door closing operation of the construction machine is continued, the tip of the sub seal member does not bend in the reverse direction due to the contact resistance with the surface of the main body of the construction machine. in deformed and can be maintained, there is an effect that extremely improving the sealing performance around the door of effectively preventing construction machinery good Gillet phenomenon. Furthermore, since the sub seal member is attached only to the upper edge of the roof side of the opening portion of the door of the construction machine, the left edge of the front pillar side, and the rear pillar side, shortening the overall length can close the door of the construction machine. There is an effect that the required force can be reduced.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a weather strip structure including a sub-seal member for a construction machine according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows an example of the structure and arrangement of a weather strip structure provided with a sub-seal member for a construction machine according to the present invention. The weather strip is a construction machine such as a hydraulic excavator work vehicle or a medium-sized hydraulic excavating machine. It is a side view which shows the state attached to the surroundings of the door opening of the driver's cab in FIG. 2 is an enlarged cross-sectional view in the direction of arrow AA in FIG. 1, and FIG. 3 is an enlarged cross-sectional view in the direction of arrow BB in FIG.

Next, referring to FIG. 2, the structure of the weather strip provided with the sub seal member of the construction machine according to the present invention will be described in detail.
A construction machine main weather strip 32 is mounted around a door opening of a construction machine such as a hydraulic excavator, a medium-sized or large-sized hydraulic excavator, and a special vehicle. As shown in FIG. 1, the main weather strip 32 for construction machinery has an endless annular shape, and the material is formed of a material such as an EPDM rubber material or an ethylene propylene diene monomer terpolymer. The main structure of the main weather strip 32 for construction machinery has a first hollow portion C1 and a second hollow portion C2 as shown in FIG.

As shown in FIG. 1, the construction machine main weather strip 32 is attached to the upper edge of the roof side 33A, the left edge of the front pillar side 33B, the rear pillar side 33C, and the like at the opening of the door 35 of the construction machine. Further, as shown in the figure, the construction machine main weather strip 32 may be attached to the entire periphery of the door 35 of the construction machine. By attaching the main weather strip 32 for construction machine to the entire periphery of the door 35 of the construction machine, it is possible to effectively prevent rainwater, dust and noise from entering the room.

As shown in FIG. 2, the construction machine main weather strip 32 includes a first hollow portion C1 and a second hollow portion C2 therein, and a partition wall 32a is provided between the first hollow portion C1 and the second hollow portion C2. Both of these, that is, the first and second hollow portions C1 and C2 are defined. The main weather strip 32 for construction machinery is formed of, for example, EPDM rubber which can be easily deformed as a whole. When the main weather strip 32 for construction machines is attached to the entire periphery of the door 35 of the construction machine, in order to obtain the ease of closing the door 35 of the construction machine, a material or soft rubber that is more flexible than a sub seal member 37 described later is used. A material having hardness or a high expansion ratio is desirable. Then, one side (upper surface side) of the main body 32A of the main weather strip 32 of the construction machine forms a substantially cylindrical outer peripheral surface 32b, and is arranged in pressure contact with the main body (body) 34 side of the construction machine 33. The other side (lower surface side) of the main weather strip 32 of the main weather strip 32 has, for example, left and right acute leg portions 32c, 32c, and is disposed on the door 35 side of the construction machine. Therefore, the sealing performance with the door 35 of the construction machine is greatly improved. As shown in FIG. 3, when the door 35 of the construction machine is closed to the main body (body) 34 of the construction machine, the main weather strip 32 is provided with the first hollow portion C1, so the main body 32A of the main weather strip 32 is provided. The substantially cylindrical outer peripheral surface 32b easily deforms and comes into close contact with the body 34 of the construction machine. As shown in FIG. 2, the construction machine main weather strip 32 is fixed to the door 35 of the construction machine 33 by a clip 36 with a predetermined interval. The head portion 36a of the clip 36 is pressed and accommodated in the second hollow portion C2.

A sub lip 32d is projected and formed on the substantially cylindrical outer peripheral surface 32b of the main body 32A of the construction machine main weather strip 32 over the entire length in the length direction of the construction machine main weather strip 32. When the door 35 is closed by a portion in the vicinity of the projecting and molded sub lip 32d on the substantially cylindrical outer peripheral surface 32b of the main body 32A of the main weather strip 32 for construction machinery, the main body 32A is deformed and its resistance is reduced. Increase. That is, since the rigidity of the main body 32A is increased, when the door 35 of the construction machine is closed, the substantially cylindrical outer peripheral surface 32b of the main body 32A of the main weather strip 32 located away from the sub lip 32d can be reliably deformed. As a result, even when formed of a highly flexible material, the main weather strip 32 for construction machinery is not twisted and can be deformed on the same line over the entire length, so that reliable sealing performance can be maintained over a long period of time. .
FIG. 2 shows the shape of the construction machine main weather strip 32 when the door 35 of the construction machine is opened.

A sub seal member 37 complements the function of the construction machine main weather strip 32. In particular, it is installed to prevent rainwater containing a large amount of mud and dust, which is assumed as a use environment of construction machinery, from flowing into the room. The material and manufacturing method of the sub-seal member 37 are substantially the same as those of the main weather strip 32 for construction machinery, but a material that is less deformable than the material of the main weather strip 32 for construction machinery can be selected for the reasons described later. As shown in FIG. 1, the sub seal member 37 is attached to the upper edge of the roof side 33A, the left edge of the front pillar side 33B, the rear pillar side 33C, etc. of the opening portion of the door 35 of the construction machine. The sub seal member 37 may be attached over the entire periphery of the door 35 of the construction machine. However, the sub seal member 37 shields rainwater that the construction machine main weatherstrip 32 naturally flows down, so that rainwater containing a large amount of mud and dust can be kept indoors without being installed over the entire periphery of the door 35 of the construction machine. It can fulfill the function of preventing inflow. As shown in FIG. 1, the sub seal member 37 is attached only to the upper edge of the roof side 33A, the left edge of the front pillar side 33B, and the rear pillar side 33C of the opening portion of the door 35 of the construction machine. The force required to close the machine door 35 can be reduced. In order to reduce the force required to close the door 35 of the construction machine, the material of the sub seal member 37 can be selected to be hard and not easily deformed, and as a result, the adhesion with the main body (body) 34 of the construction machine can be improved. Can do.

The sub seal member 37 has, for example, a substantially L-shaped cross section. Then, the upright portion 37a formed with the inclined surface, the flat bottom portion 37b, and the tip portion 37c made of a bendable elastic body are suspended from the full length of the upright portion 37a about 1/3. It comprises a short sub lip 37d projecting in a direction substantially perpendicular to the installation portion 37a. The sub seal member 37 is fixed to the construction machine door 35 with a double-sided adhesive tape 38 or the like at a position spaced from the construction machine main weather strip 32. The sub-seal member 37 is the same as the surface on which the construction machine main weather strip 32 is fixed on the door 35 of the construction machine, and is located on the periphery of the construction machine door 35, that is, outside the construction machine main weather strip 32. It is fixed by a double-sided adhesive tape 38 or the like attached to the bottom 37b of the member 37.

In the closing operation of the door 35 of the construction machine, when the closing operation of the door 35 of the construction machine is started, first, the distal end portion 37c of the sub seal member 37 comes into contact with the main body (body) 34 of the construction machine. Further, when the door 35 of the construction machine is brought closer to the main body (body) 34 of the construction machine, the front end portion 37c and the sub lip 37d of the sub seal member 37 are bent, and the front end portion 37c of the sub seal member 37 covers the surface of the main body (body) 34 of the construction machine. Rub in the direction of arrow F. At that time, the tip 37c of the sub seal member 37 acts to push out mud, dust and the like adhering to the surface of the main body (body) 34 of the construction machine in the direction of arrow F. If the sub seal member 37 is made of a hard material, this action works effectively. When the closing operation of the door 35 of the construction machine is continued, the sub lip 37d of the sub seal member 37 comes into contact with the body 34 of the construction machine. In this way, the sub seal member 37 contacts the front end portion 37c of the sub seal member 37 and the sub lip 37d on the surface of the main body (body) 34 of the construction machine, so that the contact area is increased and the confidentiality is improved. . Therefore, even if the closing operation of the door 35 of the construction machine is continued, the tip portion 37c of the sub seal member 37 is not bent in the reverse direction due to the contact resistance with the surface of the main body (body) 34 of the construction machine. The shape can be deformed and maintained in a stable state (not shown). The position indicated by the solid line in FIG. 2 is the surface position of the main body (body) 34, and the closing operation of the door 35 of the construction machine is completed.

FIG. 2 shows the shapes of the construction machine main weather strip 32 and the sub seal member 37 when the construction machine door 35 is opened. Since the projection-like sub lip 37d is provided on the sub seal member 37, the deformation resistance at the time of deformation at a limited portion around the distal end portion 37c of the sub seal member 37 and the sub lip 37d increases. That is, since the rigidity is increased, in the closing operation of the door 35 of the construction machine, the portion close to the bottom 37b of the sub seal member 37 can be surely bent, and the sub seal member 37 is repeatedly opened and closed by the opening and closing operation of the door 35 of the construction machine. Is not twisted in the reverse direction, and the sub seal member 37 can be made of a hard material as described above, thereby effectively preventing the kinking phenomenon.

It should be noted that when the door 35 of the construction machine is opened, the sub seal member 37 is not installed on the construction machine door 35 in order to prevent rainwater from entering the room from the roof side 33A of the construction machine. (Body) 34 may be installed. Even in this case, the operation of the sub seal member 37 is substantially the same.

Thus, rainwater conducted through the main body (body) 34 of the construction machine flows in the direction of arrow P1 and rainwater conducted through the door 35 of the construction machine flows in the direction of arrow P2, and does not flow into the room, thus exhibiting a waterproof function. .

As described above, the sub seal member 37 does not need to be provided on the entire periphery of the door 35 of the construction machine as shown in FIG. That is, it is not attached to the lower edge or the right edge of the door 35 of the construction machine. And as shown in FIG. 3, it is clear from sectional drawing of the arrow BB direction of FIG.

In FIG. 3, the construction of the main weather strip 32 for construction machinery itself, its operation, etc. are substantially the same as those shown in FIG.

It is a side view which shows the example which mounted | wore the cab of the construction machine with the weather strip provided with the sub seal | sticker member of the construction machine which concerns on this invention. It is an expanded sectional view of the arrow AA direction of FIG. 1, Comprising: It is a figure which shows the internal structure of the main weather strip for construction machines, and the cross-sectional shape of a sub seal member. FIG. 2 is an enlarged cross-sectional view of a portion where a sub seal member in the direction of arrow BB in FIG. 1 does not exist, and shows an internal structure of a main weather strip for construction machines. It is sectional drawing which shows one example of the weather strip in a prior art. It is an expanded sectional view which shows the other example of the weather strip in a prior art.

32 Main weather strip for construction machinery 32A Main weather strip main body for construction machinery 32a Bulkhead 32b for main weather strip for construction machinery Mainly cylindrical outer peripheral surface 32c for main weather strip for construction machinery Main weather strip for construction machinery Acute-leg leg 32d of main body Sub lip 33 of main weather strip for construction machine 33 Construction machine 33A Roof side 33B of construction machine Front pillar side 33C of construction machine Rear pillar side 34 of construction machine Body of construction machine (body)
35 Construction machine door 36 Clip 36a Clip head 37 Sub seal member 37a Sub seal member standing part 37b Sub seal member bottom part 37c Sub seal member tip 37d Sub seal member sub lip 38 Double-sided adhesive tape C1 Main weather strip for construction machine 1st hollow part C2 2nd hollow part of the main weather strip for construction machines

Claims (1)

A weatherstrip structure mounted around a door opening of a construction machine and sealing the outer periphery of the door, wherein the weatherstrip is attached to the entire periphery of the door of the construction machine and EPDM rubber or ethylene propylene diene monomer terpolymer And a main weather strip for construction machines formed with sharp leg portions on the left and right sides on the lower surface side, and spaced apart from the main weather strip for construction machines on the entire periphery or a part of the door of the construction machine The main weather strip for the construction machine is molded with a first hollow portion and a second hollow portion having substantially the same vertical width as the thickness of the clip head, The main weather strip for the construction machine is constructed by pressing and accommodating the clip in the second hollow part by the partition between the first and second hollow parts. The sub-lip in a substantially cylindrical outer peripheral surface on said construction machine for main weather strip projecting molding is fixed to the door, a further said sub-seal member cross section is substantially L-shaped, outside the door of the construction machine An upright portion having a tip portion formed of an elastic body that forms an inclined surface toward the direction F, and is substantially perpendicular to the upright portion at a position that hangs down to 1/3 of the entire length from the tip portion. becomes in a thin-shaped sub-lip which projects formed direction and short and small, the sub-seal member upper edge of the roof side of the opening of the door of the construction machine the bottom, the front pillar side of the left edge, and both surfaces only the rear pillar side A structure of a weather strip provided with a sub-seal member of a construction machine, which is attached with an adhesive tape .

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