JP5019435B2 - Cab and work machine - Google Patents

Description

  The present invention relates to a cab having a bevel glass on the front side and a work machine using the cab.

  As shown in FIG. 6, in the wheel loader 1, the front vehicle 5 having the front wheels 4 is moved in the horizontal direction with the articulate shaft (not shown) as a fulcrum with respect to the rear vehicle 3 having the rear wheels 2. The articulation cylinder (not shown) connected between the rear vehicle 3 and the front vehicle 5 is bent and actuated.

  A cab 6 is installed on the rear vehicle 3 so as to surround the operator's driver's seat, and a work device 7 used for bucket work or the like is installed on the front vehicle 5.

  As shown in FIG. 6, the cab 6 of the wheel loader 1 of this type of articulated structure uses slope glass 8 corresponding to the bending motion of the front vehicle 5 on the left and right sides of the front glass 9 (for example, , See Patent Document 1).

  In addition, there are some in which the left and right parts are bent or inclined with respect to the front part of the front glass of the cab (see, for example, Patent Documents 2 and 3).

  As shown in FIG. 7, when the slope glass 8 on both the left and right sides is formed separately and integrated with the front glass 9, the glass mounting frame 12 is generally provided between the front pillars 11 on the left and right sides of the cab. Is fixed.

This glass mounting frame 12 has a sloped glass mounting portion 16 fixed along the left and right front pillars 11 with respect to the front glass mounting portion 15 disposed below the cab roof plate 13 via the wiring space 14. The upper part of the front glass 9 is bonded to the front glass attaching part 15 and the upper part and one side part of the inclined glass 8 are attached to the inclined glass attaching part 16. The adjacent portions of the slope glass 8 and the front glass 9 located on the extension of the bent portion 17 are bonded with an adhesive.
Japanese Utility Model Publication No. 3-2813 microfilm (page 3-4, Fig. 1-3) Japanese Patent Laying-Open No. 2004-291695 (page 3, FIG. 1-4) JP 2006-36002 A (Page 4, FIGS. 1-4)

  In the cab structure shown in FIG. 7, the slant glass mounting portion 16 fixed to the front pillar 11 prevents the operator in the cab from seeing diagonally forward, and is lower than the cab roof plate 13 by the wiring space 14. There is a problem that the upper field of view is obstructed by the front glass mounting portion 15 located on the side.

  The present invention has been made in view of these points, and an object of the present invention is to provide a cab capable of improving the field of view of an operator in the cab and a work machine using the cab.

According to the first aspect of the present invention, the top plate support frame portions are respectively connected to each of the left and right sides of the cab via arcuate portions that are continuously bent from the upper part of the front pillar portion located on the cab front side. are continuously formed, a pair skeletal columnar body provided each glazing recess over the upper surface of the top support frame section from the front of the front pillar portion, a portion left by top support frame portion of these backbone pillar Each of the supported cab top plates, a glass mounting plate fixed along the cab top plate between the upper portions of the front pillar portions of the pair of skeleton pillars, a front glass attached to the glass mounting plate, and the front surface and a slope glass located on the left and right sides of the glass, glass mounting plate were respectively fitted to the glass mounting within a recess in the upper portion of the front pillar portion of the cab left and right swash Includes a glass mounting portion, the inclined surface glass over glass mounting recess of the front pillar from the slope glazing unit is fixed, the left and right of the cab top board supported respectively by top support frame portion of the cab left and right of the skeletal columnar body Some are fixed to the glass mounting recesses by respective top plate bent portions formed and bent along the arc-shaped portion of each skeleton column body and the glass mounting recesses of the top plate support frame portion, and the cab top plate The left and right end portions of the glass mounting plate fixed along the cab are cabs fixed to the respective top plate bent portions .

  According to a second aspect of the present invention, the glass attachment plate in the cab according to the first aspect includes a front glass attachment portion that is closely fixed to the lower surface of the cab top plate, and the upper portion of the front glass is attached to the front glass attachment portion. It is fixed.

  According to a third aspect of the present invention, in the cab according to the first or second aspect, a wiring guide member for electric wiring is provided along the inside of the top plate support frame portion of the skeletal column. is there.

  According to a fourth aspect of the present invention, there is provided a work comprising the airframe, the cab according to any one of the first to third aspects mounted on the airframe, and a work device installed on the airframe in front of the cab. It is a machine.

  According to the invention described in claim 1, the inclined glass mounting portion of the glass mounting plate is fitted into the glass mounting recess in the upper portion of the front pillar portion of the skeleton column body, and the front pillar portion of the front pillar portion is fitted from the inclined glass mounting portion. Since the slope glass is fixed over the glass mounting recess, the slope glass can be securely fixed by the glass mounting recess of the slope glass mounting portion and the front pillar portion, and the slope glass is directly fixed to the glass mounting recess of the front pillar portion. Since there is no slope glass mounting portion that becomes the blind spot of the slope glass as in the conventional glass mounting frame, such members and their assembly time can be reduced, and the oblique front view of the operator in the cab with respect to the slope glass can be improved. Can do.

  According to the second aspect of the present invention, since the upper portion of the front glass is fixed to the front glass mounting portion that is tightly fixed to the lower surface of the cab top plate, it is possible to improve the upper view of the operator in the cab with respect to the front glass. it can.

  According to the invention described in claim 3, even if the front glass attachment portion is fixed to the lower surface of the cab top plate in order to enlarge the upper field of view of the front glass, A wiring guide member disposed along the line can secure a route for electric wiring.

  According to the invention described in claim 4, the workability of the work by the work device installed in the airframe can be improved by improving the oblique front view of the operator in the cab at least with respect to the slope glass.

  Hereinafter, the present invention will be described in detail with reference to an embodiment shown in FIGS.

  FIG. 2 shows a wheel loader 21 as a work machine, which is used for a body 22, a cab 23 mounted on the body 22, a bucket work or a fork work installed on the body 22 in front of the cab 23. Working device 24.

  The airframe 22 is configured such that a front vehicle 28 having a front wheel 27 and a rear vehicle 26 having a rear wheel 25 are connected to an articulated shaft (not shown) as a fulcrum so as to be swingable in the left-right direction. In this structure, an articulation cylinder (not shown) provided between the front vehicle 26 and the front vehicle 28 is bent.

  The cab 23 is installed on the rear vehicle 26 so as to surround the operator's driver's seat, and each skeleton column body 31 provided in a substantially inverted L shape from the cab front side to the rear side on the cab left side and right side, and these skeletons A frame structure having a gate-shaped central column 32 integrated at the rear end of the column 31 and a rear frame 33 integrated at the rear of the central column 32. These frame structures The cab top plate 34 supported by the above is provided.

  The front space of the cab 23 is provided with a front glass 35 and sloped glass 36 bonded to the left and right sides of the front glass 35, and the cab between the skeleton column 31 and the central column 32 is provided. The side space is provided with a door 37 that can be opened and closed with a rear hinge (not shown) as a fulcrum, and the rear space of the cab between the rear body 38, the central column 32, and the rear frame 33 has a rear glass. 39 is provided.

  The work device 24 is installed on the front vehicle 28, and the base ends of the lift arms 42 are pivotally supported by a pair of arm mounting brackets 41 provided integrally with the front vehicle 28, respectively. A connecting device (so-called quick coupler) 43 is pivotally supported at the tip of these lift arms 42, and various attachments (not shown) such as buckets or forks are connected with one touch through this connecting device 43. The

  The work device 24 includes a lift cylinder 42 that is lifted and lowered by a lift cylinder 44 that is axially connected between each arm mounting bracket 41 and each lift arm 42, and a tilt cylinder 45 that is pivotally supported on the front vehicle 28. As a result, the attachment such as the coupling device 43 and the bucket is tilted via the tilt lever 46 pivotally supported between the pair of lift arms 42 and the rod 47 pivotally coupled to the lower end of the tilt lever 46. It is rotated.

  As shown in FIGS. 3 and 4, each of the skeleton pillars 31 is formed of a deformed tube having a square cross section, and as shown in FIGS. 1 and 5, a front pillar portion 51 located on the cab front side, An arc-shaped portion 52 that is continuously bent backward from the upper part of the front pillar portion 51, and a top-plate support frame portion 53 that is continuously formed on the arc-shaped portion 52 and supports the cab top plate 34. Yes.

  As shown in FIG. 3, the door 37 has a sash frame 56 attached to a rectangular tube-shaped door frame 54 via a mounting plate 55 with bolts / nuts and the like, and a door window 57 is vertically mounted on the sash frame 56. Installed slidably. Instead of the sash frame 56 and the door window 57, the door glass may be directly bonded to the mounting plate 55 of the door frame 54.

  A seal member 58 formed of an elastic material such as rubber is bonded to the cab inner surface side of the door frame 54. The seal member 58 is formed such that a small tongue piece portion 58a and a large tongue piece portion 58b are easily expanded and deformed via a groove portion 58c.

  As shown in FIG. 3, the skeletal column 31 has an L-shaped groove-like recess 61 that fits with the door frame 54 at the outer corner on the rear side of the tube over the entire length of the deformed tube. A V-shaped groove 62 as a glass mounting recess is formed on the front side of the tube over the entire length of the tube. That is, as shown in FIGS. 3 and 4, the recess 61 is continuously provided from the rear surface side of the front pillar portion 51 to the lower surface side of the top plate support frame portion 53, and the V-shaped groove portion 62 is formed of the front pillar. It is continuously provided from the front surface side of the portion 51 to the upper surface side of the top plate support frame portion 53.

  As shown in FIG. 3, the edge portions of the sloped glass 36 located on the left and right sides of the front surface of the cab are bonded to the inside of the V-shaped groove 62 of the skeleton column 31 by an adhesive 63, and the entire length of the deformed tube is extended. An arcuate convex surface portion 64 having an arcuate cross section is bulged from the tube front surface adjacent to the V-shaped groove 62 to the tube outer surface side.

  The cross-sectional shape of the skeletal column 31 is such that a V-shaped groove 62 is formed continuously with the rounded portion R1 on the tube inner side and the front side of the skeletal column 31, and the seven rounded portions R1 start from this rounded portion R1. , R2, R3, R4, R5, R6, and R7 are formed.

  Further, the recess 61 is formed in a concave corner shape by the flat portion 65 between the rounded portions R4 and R5 and the flat portion 66 between the rounded portions R5 and R6, and is formed on the door frame 54 facing the flat portion 66. When the seal member 58 is bonded to the opposing surface, and the door frame body 54 and the seal member 58 are inserted into the recess 61 with the door closed, the seal member 58 is moved from the flat surface portion 66 of the recess 61 to the rounded portion. It is configured to be in close contact over R6.

  As shown in FIG. 1, a V-shaped groove portion 62 is provided from the front surface of the front pillar portion 51 of the skeletal column 31 to the upper surface of the top plate support frame portion 53, and the cab top plate 34 extends along the V-shaped groove portion 62. A left and right part of the top plate is molded and bent to provide a top plate bent portion 34a.

  A glass mounting plate 71 is fixed along the lower surface of the front portion of the cab top plate 34 by welding or screwing between upper portions of the front pillar portions 51 in the pair of left and right skeleton columns 31. The left and right end portions of the glass mounting plate 71 are fixed to the top plate bent portion 34a so as to be fitted into the V-shaped groove portions 62 in the upper portions of the front pillar portions 51 on both the left and right sides.

  The glass mounting plate 71 includes a beveled glass mounting portion 72 fitted in a V-shaped groove 62 at the top of the front pillar portion 51 and a front glass mounting portion 73 that is closely fixed to the lower surface of the cab top plate 34. The upper part of the front glass 35 is fixed to the front glass attaching part 73 with an adhesive, and the upper part and one side of the inclined glass 36 extend from the inclined glass attaching part 72 to the V-shaped groove part 62 of the front pillar part 51. The portion is fixed by an adhesive 63 as shown in FIG.

  A mounting hole 75 for mounting a work light, a warning light, or the like is formed in the upper portion of the inclined glass mounting portion 72 of the glass mounting plate 71, and the unused mounting hole 75 is closed by a plug member. A handrail 77 is fixed to the outer surface of the front pillar portion 51 by welding.

  As shown in FIG. 5, wiring guide members 78 and 79 for electric wiring are disposed along the inside of the top plate support frame portion 53 and the rear frame body 33 of the skeleton column 31, and the electric wiring 81 is The wiring guide members 78 and 79 are disposed along the back side of the glass mounting plate 71 and along the central column body 32 and the rear frame body 33. The wiring guide members 78 and 79 are formed in a duct shape or a cover shape as shown in FIG. As shown in FIG. 5, a rear wiper 82 is installed on the back surface of the rear glass 39.

  Next, the function and effect of this embodiment will be described.

  The front view of the operator in the cab is secured through the front glass 35 and the slope glass 36, and the rear view is secured through the rear glass 39.

  When the door 37 is closed, as shown in FIG. 3, the door frame 54 and the seal member 58 are fitted into the recess 61, and the small tongue piece 58 a and the large tongue piece 58 b of the seal member 58 are connected to the skeleton column 31. The flat portion 66 in the concave portion 61 is pressed and enlarged while being deformed so that the sealing performance is ensured.

  As shown in FIG. 1, the upper portion of the front glass 35 is fixed to the front glass mounting portion 73 of the glass mounting plate 71 with an adhesive, and the V-shaped groove portion 62 in the upper portion of the front pillar portion 51 of the skeleton column 31 is placed. As shown in FIG. 3, the slope glass attachment portion 72 of the glass attachment plate 71 is fitted and the slope glass attachment portion 72 extends from the slope glass attachment portion 72 to the V-shaped groove portion 62 of the front pillar portion 51. It is fixed by an adhesive 63. The boundary portion between the front glass 35 and the slope glass 36 is also connected with an adhesive.

  Since it did in this way, the slope glass 36 can be fixed reliably by the slope glass attaching part 72 and the V-shaped groove part 62 of the front pillar part 51, and the slope glass 36 was directly fixed to the V-shaped groove part 62 of the front pillar part 51. In the portion, most of the sloped glass mounting portion 16 that becomes the blind spot of the sloped glass 8 such as the conventional glass mounting frame 12 shown in FIG. 7 can be deleted, so the material and assembly time of such a glass mounting frame 12 In addition, the oblique front view of the operator in the cab with respect to the slope glass 36 can be improved.

  Since the upper portion of the front glass 35 is fixed to the front glass mounting portion 73 that is closely fixed to the lower surface of the cab top plate 34, the upper view of the operator in the cab with respect to the front glass 35 can be improved. That is, conventionally, as shown in FIG. 7, the front glass mounting portion 15 of the glass mounting frame 12 is arranged below the cab roof plate 13 via the wiring space 14, so that the wiring space 14 and the front glass mounting portion are arranged. Although 15 is the blind spot of the upper field of view, in the embodiment shown in FIG. 1, only the front glass mounting portion 73 is the blind spot of the upper field of view, so that the upper field of view can be enlarged.

  Thus, even if the front glass mounting portion 73 is closely fixed to the lower surface of the cab top plate 34 in order to enlarge the upper field of view on the front glass 35, the skeleton is formed on the back side of the inclined glass mounting portion 72 as shown in FIG. Since the wiring guide member 78 is disposed along the inner side of the top plate support frame portion 53 of the column 31, a path for electrical wiring can be secured.

  Thus, the bucket work by the work device 24 installed in the front vehicle 28 of the fuselage 22 is improved by improving the upper view of the operator in the cab with respect to the front glass 35 and the oblique front view of the operator in the cab with respect to the slope glass 36. Or, workability such as fork work can be improved.

  The present invention is applicable to cabs and work machines such as wheel loaders, hydraulic excavators, and bulldozers.

It is a principal part perspective view from the front side which shows one Embodiment of the cab which concerns on this invention. 1 is a perspective view showing an embodiment of a work machine according to the present invention. It is a horizontal sectional view in the frame pillar body and door frame of the cab same as the above. It is a vertical sectional view in the cab top plate of the same cab and the top plate support frame portion of the skeleton column. It is a rear part perspective view of a cab same as the above. It is a perspective view which shows the conventional working machine. It is a front view which shows a part of conventional cab.

Explanation of symbols

21 Wheel loaders as work machines
22 Airframe
23 cab
24 work equipment
31 Skeletal column
34 Cab top plate
34a Bending section
35 Front glass
36 Slope glass
51 Front pillar
52 arc-shaped part
53 Top plate support frame
62 V-shaped groove as glass mounting recess
71 Glass mounting plate
72 Slope glass mount
73 Front glass mount
78 Wiring guide members

Claims (4)

Top support frame section from the upper part of the front pillar portion via an arc-shaped portion which is curved respectively continuously rearward respectively located cab front in the cab left and right are respectively continuously formed from the front surface of the front pillar portion A pair of skeletal columns each provided with a glass mounting recess over the top surface of the top support frame;
A cab top plate supported by left and right parts by the top plate support frame of these skeletal columns,
Glass mounting plate fixed along the cab ceiling plate between the upper portion of the front pillar in the pair of skeletal columnar body,
With the front glass attached to this glass mounting plate and the slope glass located on the left and right sides of this front glass ,
Glass mounting plate is provided with a slope glass mounting portion fitted respectively to the glass mounting within a recess in the upper portion of the front pillar portion of the cab left and right,
The slope glass is fixed over the glass mounting recess of the front pillar portion from the slope glass mounting portion ,
The left and right part of the cab top plate supported by the top plate support frame portion of the left and right skeleton column bodies are along the arc-shaped portion of each skeleton column body and the glass mounting recess of the top plate support frame portion. It is fixed to the glass mounting recess by the molded and bent top plate bent part,
The cab is characterized in that the left and right end portions of the glass mounting plate fixed along the cab top plate are fixed to respective bent portions of the top plate . The glass mounting plate includes a front glass mounting portion that is closely fixed to the lower surface of the cab top plate,
The cab according to claim 1, wherein an upper portion of the front glass is fixed to the front glass mounting portion. The cab according to claim 1 or 2, further comprising: a wiring guide member for electric wiring disposed along the inside of the top plate support frame portion of the skeletal column. The aircraft,
The cab according to any one of claims 1 to 3 mounted on the airframe,
A work machine comprising: a work device installed on the airframe in front of the cab.

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