JP3618213B2 - Cab for construction machinery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cab for a construction machine such as a hydraulic excavator or a crane having a window that can be opened and closed.
[0002]
[Prior art]
FIG. 11 is a cross-sectional view of an essential part of a sliding window frame structure of a construction machine cabin described in JP-A-8-311930. In the window frame structure of one embodiment of the prior art shown in FIG. 11, a window frame frame 9 having a Y-shaped cross section, a run channel 10 fitted inside the window frame frame 9, and the window frame frame 9 and the cabin 4 are arranged. A rubber material 1 interposed between the opening edge, and the book innocence 1 includes a U-shaped recess 15 that holds the back and outer surfaces of the window frame frame 9, a deep groove-shaped slit 16, and the recess The rubber material 1 has a cross-sectional shape having a receiving seat 3 positioned on the back side of 15, the window frame frame 9 is inserted into the recess 15, the flange 7 at the cabin opening edge is inserted into the slit 16, And the window frame 19 is hold | maintained in the state in which the receiving seat 3 seated on the receiving surface 8 of the cabin opening edge. Further, the rubber member 1 has a substantially S-shaped basic cross-sectional shape in which the concave portion 15 and the slit 16 are arranged side by side in the opposite direction, and a water sealing rib extending from the outdoor side end portion of the basic cross-sectional shape toward the opposite concave portion side. 2 to form a cross-sectional shape. In addition, 5 is an inner panel and 6 is an outer panel.
[0003]
FIG. 12 is an example of a hydraulic excavator to which a cab having a sliding window structure as shown in FIG. 11 is applied. Moving windows 20'a and 20'b are arranged in window holes 13 'provided in the door 12' of the cab 11 'of the excavator, and the moving windows 20'a and 20'b are respectively indicated by arrows a, The window can be set in an open state and a closed state. Since the cab 11 ′ of the excavator of FIG. 12 has a relatively square shape when viewed from the side, the movable windows 20′a and 20′b are movable with the upper and lower edges of the window hole portion 13 ′ being parallel to each other. A large glass surface can be taken in the vertical direction.
[0004]
FIG. 13 is another example of a conventional cab whose side view is based on an arc shape. The cab 11 ″ is provided with a moving window 20 ″ and a fixed window 22 ″. Since the fixed window 22 ″ is formed in an arc shape in accordance with the arc-shaped cab 11 ″, a large glass surface is taken. The moving window 20 ″ can be moved in the vertical direction in order to maintain the aesthetic appearance.
[0004]
[Problems to be solved by the invention]
In recent years, many cabs of construction machinery have used many arc shapes in side view in order to give a soft visual impression to the periphery. When a sliding window in the front-rear direction as shown in FIG. 11 is applied to a cab that uses many arc shapes in such a side view, a window frame that appears parallel to the top and bottom of the arc-shaped cab appears. It doesn't match and the beauty is lost. Further, in recent construction machine cabs, there is a demand for a glossy design that uses many glass surfaces for appearance, but when a sliding window as shown in FIG. 11 is applied to an arc-shaped cab, the side of the cab It was difficult to cover the vicinity of the upper center with a glass surface, and glossiness could not be obtained.
[0005]
Further, in the window frame structure of FIG. 11, a run channel 10 is fitted inside a window frame frame 9 (for a sliding window) having a cross-section of a Y-shape. The rubber material 1 is interposed between the outer peripheral edge of the frame frame 9 and the opening edge of the cabin 4. Therefore, since the window frame frame 9 is not securely fixed to the cabin 4, the window glass tends to vibrate when the construction machine is running or working, and the window frame frame 9 is deformed. This may adversely affect the sliding movement of the window glass.
[0006]
The present invention provides a glossy cab that uses a large number of arc shapes in a side view and has an openable window that matches the arc shape, and uses a lot of glass.
[0007]
[Means for Solving the Problems]
A window hole opened in the outer wall of the cab,
A window frame having a substantially U-shaped cross-section formed along the outer periphery of the window hole and having one open side, and a first seal member at least partially embedded in the substantially U-shaped cross-section of the window frame And a movable window guided and slidable by the first seal member, and an outer edge of a substantially U-shaped cross section having the same cross section as the portion of the window frame in which the first seal member is internally provided. A second sealing member, and a fixed window that is fixedly bonded to the second sealing member and covers a part of the window hole and a part of the window frame. The movable window is movable so as to be located on the back side of the fixed window.
[0008]
When the window is closed due to the configuration of the window of the cab, the moving window is located in a range of a portion where the window frame is not covered by the fixed window. When the window is opened, the moving window is located on the back side of the fixed window. According to this, it is possible to determine the shape of the fixed window without being constrained by the shape of the window hole portion, it is possible to obtain a window that matches the cab using many arc shapes, and it is possible to take a large glass surface on the outer periphery of the cab It is.
[0009]
Furthermore, it has the 3rd seal member fitted by the outer edge of the part which is not covered with the said fixed window of a window frame, The said 3rd seal member is the edge of the said fixed window from the outer edge of the said window frame. A lip portion extending to substantially the same position as the portion position is provided.
[0010]
When the fixed window is made larger than the window hole or window frame, the moving window located in the window frame is smaller than the fixed window, and the edge of the fixed window and the moving window are not continuous. According to this, since the third seal member is extended to the vicinity of the edge of the fixed window, the edge of the fixed window and the edge of the third seal member are continuous images. An appearance image with a bodily sensation can be obtained.
[0011]
Furthermore, when the first seal member and the second seal member or the first seal member and the third seal member are integrally formed, the number of parts of the seal member can be reduced, so that productivity is improved. Further, when the rubber or the like constituting the seal member contracts due to secular change, no gap is generated between the seal members, and the sealing performance can be maintained.
[0012]
Furthermore, when the first seal member, the second seal member, and the third seal member are integrally formed, the above-described action can be obtained more remarkably.
[0013]
Furthermore, the first seal member has a groove formed on the back surface at a position facing the edge of the moving window, and a hard rod-like or linear gap adjusting member is fitted into the groove. did.
[0014]
According to this, the interval between the facing edge of the moving window and the groove is adjusted, and the holding force of the first seal member in the window frame with respect to the moving window is set to an appropriate value. The sliding movement of the moving window can be performed smoothly.
[0015]
Furthermore, a plurality of types of the gap adjusting member having different diameters are set, and the gap adjusting member can be selectively replaced according to play when the moving window is moved. According to this, when the movement of the moving window is hard when sliding, the small gap adjustment member is selected and replaced. Since the gap increases and the play in the vertical direction of the moving window becomes appropriate, the sliding movement of the moving window can be made smooth. Further, since the play in the vertical direction is in an appropriate state when the moving window is slid, the sliding movement of the moving window can be made smooth. If the play in the vertical direction is large when sliding the moving window, the play can be adjusted and set to an appropriate state by selecting a large-diameter clearance adjustment member and replacing it. it can.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a cab 11 according to an embodiment of the present invention. In the figure, 12 is a door for the driver's entrance of the cab 11, 13 is a window hole on the upper side of the door 12, 14 is a window frame, 20 is a moving window, and 21 is a handle provided on the inner surface side of the moving window 20. The double metal fitting 22 is a fixed window. FIG. 2 is a cross-sectional view of the main part showing the window 23 of the first embodiment in the cab 11 of the present invention as seen from AA in FIG. 1 (the cross section is not hatched for easy understanding). It is. In the figure, reference numeral 24 denotes an inner panel of the cab 11 (specifically, the door 12, but for the sake of simplicity, hereinafter referred to as the cab 11), 25 an outer panel, and 26 a front window 27 on the front surface of the cab 11. The guide rail guides the roller 28.
[0017]
FIG. 3 is an enlarged view of a portion B in FIG. In the figure, 29 is a flange plate edge of the inner panel 24 constituting the window frame 14, 30 is a flange plate edge of the outer panel 25 similarly constituting the outer edge of the window frame 14, and 31 is also the window frame 14. , A sash frame having a substantially U-shaped cross section, 32 is an inner vertical plate frame portion of the sash frame 31, and 33 is a first seal member in which at least a part of the window frame 14 (sash frame 31) is internally installed, Are the lips that respectively contact the inner and outer surfaces of the moving window 20, 36 is the top of the first seal member 33 protruding in a convex shape, 37 is a slit, 38 is a flexible lip, 39a, 39b, and 39c are respectively A flocking member 40 fixed to the abutting portion of the lip 34, the lip 35, and the top portion 36 with respect to the moving window 20 is fixed to the inner surface of the fixed window 22 and to the flange plate edge 30 which is the outer edge of the window frame 14. The fitted second shi Seal member, 41 is the second seal member 40 of the slit 42 is flexible lip 43 abuts lip moving window 20, 44 is a flocked member. FIG. 4 is a view showing a state where the fixed window 22 in FIG. 2 is removed.
[0018]
FIG. 5 is a view showing the window 23 viewed from the outside of the cab 11. In the figure, reference numeral 45 denotes a third seal member fitted to a portion of the flange plate edge 30 that is not covered by the fixed window 22. Reference numeral 57 denotes a fourth seal member fitted to the edge 46 of the fixed window 22 (curved oblique edge extending from the rear edge of the fixed window 22 to the lower edge B). 6 is a cross-sectional view of the third seal member 45 as seen from CC in FIG. FIG. 7 is a cross-sectional view of the fourth seal member 57 as seen from DD in FIG. In the figure, reference numerals 47a and 47b denote lips to be brought into contact with the moving window 20, and reference numerals 48a and 48b denote flocked members fixed to the lips 47a and 47b, respectively.
[0019]
Next, the configuration and operation of the window 23 of the first embodiment in the cab 11 of one embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a window hole portion 13 opened in the outer wall of the cab 11, and a substantially U-shaped window frame 14 (sash frame 31) formed along the outer periphery of the window hole portion 13 and opened at one side. (Shown in FIG. 3), a first seal member 33 that is at least partially housed in the sash frame 31, a moving window 20 that is slidably moved by being guided by the first seal member 33, and the window A second seal member 40 fitted to a flange plate edge portion constituting the outer end portion of the frame 14, and a part of the window hole 13 and the window frame 14 are fixedly bonded to the second seal member 40. And a fixed window 22 fixed so as to cover a part thereof.
[0020]
Although not shown, the window frame 14 does not necessarily have to be formed in a substantially U shape over the entire hole periphery of the window hole portion 13. For example, depending on the amount of movement of the moving window 20, the front side of the hole 13 may not be U-shaped.
[0021]
When the window 23 is closed due to the configuration of the window 23 of the cab 11, the moving window 20 is located in a range where the window hole portion 13 is not covered by the fixed window 22. . Thus, when the window 23 of the cab 11 is opened, the window 23 is moved by sliding the moving window 20 toward the range where the window hole portion 13 is covered by the fixed window 22. Can be opened.
[0022]
Further, only the moving window 20 is slidably fitted to the window frame 14 (sash frame 31), and the fixed window 22 is an outer end portion of the window frame 14 (flange plate edge 30). The window 23 having an arc-shaped outer shape that matches the design of the cab 11 using many arc shapes without being bound by the shape of the window frame. The window 23 can be formed, and the structure of the window can be simplified to provide an inexpensive and maintainable window 23.
[0023]
The third seal member 45 includes a third seal member 45 (shown in FIGS. 5 and 7) fitted to the window frame 14 (flange plate edge 30) that is not covered by the fixed window 22. Is formed by extending from the outer edge of the flange plate edge 30 to substantially the same position as the edge 46 of the fixed window 22. As a result, the third seal member 45 is extended to the vicinity of the edge portion 46 of the fixed window 22, so that the end portion 46 of the fixed window 22 and the end edge portion of the third seal member 45 become a continuous image, and as a whole window , You can get an appearance image with a sense of unity. When the second seal member 40 is also extended to the vicinity of the end 46 of the fixed window 22 (the third seal member and the second seal member have substantially the same cross-sectional shape), the second seal member is enlarged. However, there is an advantage that the second seal member and the third seal member can be formed in the same mold.
[0024]
Further, due to the fitting of the fourth seal member 57, external lip 47a, 47b provided on the fourth seal member 57 may enter the space between the moving window 20 and the fixed window 22, such as external dust, rain water, etc. Can be prevented from entering.
[0025]
Further, the first seal member 33 and the second seal member 40 or the first seal member 33 and the third seal member 45 are integrally formed. As a result, the number of parts of the seal member can be reduced, so that the productivity can be improved, and when the rubber constituting the seal member shrinks due to secular change, no gap is generated between the seal members, and the sealing performance is improved. Can be maintained.
[0026]
Further, the first seal member 33, the second seal member 40, and the third seal member 45 are integrally formed. Accordingly, the number of parts can be reduced by using the first, second, and third seal members (33, 40, 45) as one seal member, and the second seal member 33 can be used during the fitting operation of the first seal member 33. Each of the seal member 40 and the third seal member 45 can be easily positioned at a required fitting position.
[0027]
Moreover, FIG. 8 is principal part sectional drawing which shows the 1st sealing member 49 of the other Example in the window 23 of 1st Embodiment. In the first seal member 49 shown in FIG. 8, a groove portion 50 is continuously formed in the longitudinal direction of the first seal member 49 on the back surface at a position facing the edge portion of the moving window 20, and the groove portion 50 is hard ( A rod-like or linear gap adjusting member 51 (which is made of a hard material such as a synthetic resin or a steel cord) is fitted. As a result, the gap (the gap dimension is S) between the end edge of the moving window 20 and the groove 50 (specifically, the top surface C in the groove 50) is adjusted, and the sash frame 31 is adjusted. The holding force of the first seal member 49 in the moving window 20 (for example, the pressing force of the lip formed on the first seal member 49 against the moving window 20) is set to an appropriate value, and the moving window 20 sliding movements can be performed smoothly.
[0028]
A plurality of types of gap adjusting members 51 having different diameters φd are set, and can be selectively replaced according to the play when the moving window 20 is moved. As a result, if the movement of the moving window 20 is difficult when sliding, the small gap adjustment member (51) is selected and replaced. Since the gap (gap size S) is increased and the play in the vertical direction of the moving window 20 becomes appropriate, the sliding movement of the moving window 20 can be made smooth. If the play in the vertical direction is large when the moving window 20 is slid, the play is adjusted to an appropriate state by selecting and replacing the gap adjusting member (51) having a large diameter. Can be set.
[0029]
Next, FIG. 9 is a cross-sectional view of an essential part showing the window 52 of the second embodiment in the cab 11a of the present invention (the entire view of the cab 11a is not shown). In the figure, 13a is a window hole portion of the cab 11a, 14a is a window frame, 24a is an inner panel of the cab 11a, 25a is an outer panel, 29a is a flange plate edge of the inner panel 24a constituting the window frame 14a, and 30a is the same. A flange plate edge portion of the outer panel 25a constituting the window frame 14a, 31a is a window frame having a substantially U-shaped cross section similarly constituting the window frame 14a, 53 is an outer vertical plate frame portion of the sash frame 31a, and 33a is a window. The first seal member fitted inside the U-shape of the frame 14a (sash frame 31a), 20a is a moving window, 40a is a second seal member attached and fixed to the inner surface of the fixed window 22a, and 41a is a second seal member A deep groove-like slit 42a formed in 40a is a flexible lip. FIG. 10 is an enlarged view showing a free state of the second seal member 40a in FIG. In the window 52 of the second embodiment, the cross-sectional shape of the second seal member 40a that is mounted and fixed to the inner surface of the fixed window 22a is made a simple semicircular shape, and the slit 41a of the second seal member 40a is removed. The flange plate edge 30a of the panel 25a and the outer frame plate frame 53 of the sash frame 31a are fitted. Therefore, the window 52 can be manufactured small and inexpensively.
[0030]
【The invention's effect】
According to the first aspect of the present invention, the fixed window can be determined without being limited by the shape of the window hole portion, a window matching the cab using a large number of arc shapes can be obtained, and the glass surface of the outer periphery of the cab can be obtained. It is possible to take large.
[0031]
According to the second aspect of the present invention, since the third seal member extends to the vicinity of the end edge portion of the fixed window, an image in which the end edge portion of the fixed window and the end edge portion of the third seal member are continuous is obtained. Therefore, it is possible to obtain an appearance image having a sense of unity as the entire window.
[0032]
According to the invention described in claim 3, since the number of parts of the seal member can be reduced, the productivity can be improved, and the seal member can be easily managed and the seal member can be easily fitted. When the rubber or the like constituting the material shrinks due to secular change, no gap is generated between the seal members, and the sealing performance can be maintained. Further, according to the invention described in claim 4, this effect can be obtained more remarkably.
[0033]
According to invention of Claim 5, while the clearance gap between the edge part of the said movement window and the said groove part is adjusted, the holding force with respect to the said movement window of the said 1st seal member in the said window frame is carried out. It is set to an appropriate value, and the sliding movement of the moving window can be performed smoothly.
[0034]
According to the sixth aspect of the present invention, when the movement of the moving window is difficult when sliding, the small gap adjustment member is selected and replaced. Since the gap increases and the play in the vertical direction of the moving window becomes appropriate, the sliding movement of the moving window can be made smooth. Further, since the play in the vertical direction is in an appropriate state when the moving window is slid, the sliding movement of the moving window can be made smooth. If the play in the vertical direction is large when sliding the moving window, the play can be adjusted and set to an appropriate state by selecting a large-diameter clearance adjustment member and replacing it. it can.
[Brief description of the drawings]
FIG. 1 is a side view of a cab according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the main part showing the window of the first embodiment in the cab of the present invention as seen from AA in FIG. 1;
FIG. 3 is an enlarged view of a portion B in FIG. 2;
4 is a view showing a state in which a fixed window in FIG. 2 is removed. FIG.
FIG. 5 is a view showing a window viewed from the outside of the cab of the present invention.
6 is a cross-sectional view taken along the line CC of FIG.
7 is a cross-sectional view taken along line DD of FIG.
FIG. 8 is a cross-sectional view of a main part showing a first seal member of another example in the window of the first embodiment.
FIG. 9 is a cross-sectional view of an essential part showing a window according to a second embodiment of the cab of the present invention.
10 is an enlarged view showing a free state of the second seal member in FIG. 9. FIG.
FIG. 11 is a cross-sectional view of an essential part of a sliding window frame structure according to an embodiment of the prior art.
FIG. 12 is a view showing a hydraulic excavator to which a cab having a sliding window structure according to the prior art is applied.
FIG. 13 is an example of a cab whose side view of the prior art is based on an arc shape.
[Explanation of symbols]
4,11,11 ', 11 "Cab (cabin)
14, 14a Window frame 9, 31, 31a, 31b Sash frame 13, 13a Window hole 16, 37, 41, 41a Slit 20, 20a Moving window 22, 22a Fixed window 23, 23 ', 52, 54 Window 29, 29a , 30, 30a Flange plate edge 32 Inner vertical plate frame portions 33, 33a, 49 First seal members 34, 35, 43, 47a, 47b Lips 38, 42, 42a Flexible lips 39a, 39b, 39c, 44, 48a, 48b Flocking member 40, 40a Second seal member 45 Third seal member 46 Edge 51 Clearance adjustment member 53 Outer vertical plate frame

Claims (6)

A window hole opened in the outer wall of the cab,
A window frame having a substantially U-shaped cross-section formed along the outer periphery of the window hole and having one open;
A first seal member that is at least partially housed in a substantially U-shaped cross section of the window frame;
A moving window guided by the first seal member and slidable;
A second seal member fitted to the outer edge of the substantially U-shaped cross section of the window frame in the same cross section as the portion of the window frame in which the first seal member is internally provided ;
While being bonded and fixed to the second sealing member, it possesses a part and the fixed window which is fixedly provided over a portion of the window frame of the window hole portion,
A construction machine cab characterized in that the moving window is movable so as to be positioned on the back side of the fixed window . A third seal member fitted to an outer edge of a portion of the window frame that is not covered by the fixed window; The cab for construction machinery according to claim 1, further comprising a lip portion extending to substantially the same position as the lip portion. The construction machine cab according to claim 1 or 2, wherein the first seal member and the second seal member or the first seal member and the third seal member are integrally formed. The cab for construction machinery according to claim 2, wherein the first seal member, the second seal member, and the third seal member are integrally formed. The first seal member has a groove formed on the back surface at a position facing the edge of the moving window, and a hard rod-like or linear gap adjusting member is fitted into the groove. The cab for construction machines as described in any one of Claims 1 thru | or 3. 6. The cab for construction machinery according to claim 5 , wherein a plurality of types of the gap adjusting members having different diameters are set, and can be selectively replaced according to play when the moving window moves. .

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