JP5616323B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle including a harvester device.

  Conventionally, a work vehicle including a harvester device has been widely used (see, for example, Patent Document 1). According to such a work vehicle, it is possible to efficiently perform tree-building work such as logging, pruning, and cutting of timber by the harvester device.

  On the other hand, there is a case where fragments of a blade of a chainsaw attached to the harvester device fly toward an operator in the cab. Thus, in a work vehicle equipped with a harvester device, a front window made of tempered glass is usually attached to the front surface of the cab in order to protect the operator from flying objects.

International Publication No. WO2008 / 047450

  In recent years, it has been desired to attach a front window made of polycarbonate, which is more resistant to penetration than tempered glass, to the cab in order to ensure the protection of the operator (see ISO11837). However, since the front window made of polycarbonate is thicker than the one made of tempered glass, if the front window made of tempered glass is replaced with one made of polycarbonate, the grounding property of the wiper with respect to the front window (ground pressure, grounding position, etc.) decreases. There is a risk. Therefore, when attaching the front window made of polycarbonate, it is necessary to appropriately adjust the attachment state of the wiper.

  The present invention has been made in view of the above-described situation, and an object thereof is to provide a work vehicle that does not require adjustment of a wiper while improving penetration resistance of a front window.

  A work vehicle according to a first aspect includes a cab, a harvester device disposed in front of the cab and including a chainsaw, a rectangular annular front window frame attached to the cab, and a resin fixed to the front window frame. A front window. The front window includes a first outer edge portion that is bonded to the front surface of the front window frame, a first inner edge portion that is provided inside the first outer edge portion, and protrudes into the cab from the first outer edge portion. Have.

  According to the work vehicle which concerns on a 1st aspect, while ensuring the thickness of the 1st inner side part which functions as a chain shot guard sufficiently by thinning the 1st outer edge part adhere | attached on a front window frame, a front window It is suppressed that the outer surface of this protrudes ahead. Therefore, even when the front window made of tempered glass is replaced with a front window made of resin, the proper grounding property of the wiper with respect to the front window can be maintained.

  The work vehicle according to a second aspect relates to the first aspect, and further includes a lower window attached to the cab below the front window frame. The cab has a slit portion that supports both sides and the lower side of the lower window. The lower window includes a second outer edge portion sandwiched between the slit portions, and a second inner portion that is provided inside the second outer edge portion and projects into the cab from the second outer edge portion.

  According to the work vehicle which concerns on a 2nd aspect, the outer surface of a lower window is ensured, fully securing the thickness of the 2nd inner side part which functions as a chain shot guard by thinning the 2nd outer edge part pinched | interposed into a slit part. Can be placed flush with the outer surface of the front window. Therefore, it is possible to improve the appearance quality of the lower window while widening the visual field in the front lower direction of the operator.

  A work vehicle according to a third aspect relates to the second aspect, and further includes a metal plate disposed in the cab and covering a boundary between the front window frame and the lower window. The metal plate is fixed to the lower frame of the front window frame.

  According to the work vehicle which concerns on a 3rd aspect, it can suppress that a flying object penetrate | invades in a cab from the clearance gap between a front window frame and a lower window.

  A work vehicle that does not require adjustment of the wiper while improving the penetration resistance of the front window can be provided.

Front perspective view of work vehicle 100 Front view of cab 60 Plan view of front window 61 AA sectional view of FIG. Partial enlarged view of FIG. Plan view of lower window 62 BB sectional view of FIG. CC sectional view of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, a harvester specification work vehicle capable of cutting, pruning and cutting timber will be described as an example. However, the work vehicle is a processor specification capable of performing only pruning and cutting of wood. There may be.

  In the following description, “upper”, “lower”, “left”, “right”, “front”, and “rear” are terms based on the operator seated on the operator seat.

(Overall configuration of work vehicle 100)
FIG. 1 is a front perspective view of a work vehicle 100 according to an embodiment.

  The work vehicle 100 includes a lower traveling body 10, a swivel base 20, a counterweight 30, an equipment room 40, an engine room 50, a cab 60, a boom 70, an arm 80, and a harvester device 90.

  The lower traveling body 10 has a pair of crawler belts 11 and 12 that can rotate independently of each other. The work vehicle 100 can move back and forth and right and left by rotating the pair of crawler belts 11 and 12.

  The swivel base 20 is supported on the lower traveling body 10 so as to be turnable. The swivel base 20 constitutes a vehicle body frame of the excavator 100. On the swivel base 20, a counterweight 30, an equipment room 40, an engine room 50, and a cab 60 are arranged.

  The counterweight 30 is disposed behind the engine chamber 50. The counterweight 30 is formed, for example, by putting scrap iron, concrete, or the like in a box assembled from steel plates.

  The equipment room 40 is disposed in front of the engine room 50. The equipment room 40 accommodates a hydraulic oil tank, a fuel tank, and the like.

  The engine room 50 is disposed between the counterweight 30, the equipment room 40, and the cab 60. The engine room 50 accommodates an engine, an exhaust gas treatment device, and the like.

  The cab 60 is disposed on the swivel base 20. The cab 60 is a cab where an operator of the work vehicle 100 rides. The cab 60 is disposed in front of the engine chamber 50 and on the side of the boom 70 so that the operator can look over the movement of the work implement 70. A front window 61 and a lower window 62 are attached to the front surface of the cab 60. The front window 61 and the lower window 62 function as a chain shot guard for protecting the operator from the flying of a blade of a chain saw 96 described below (hereinafter referred to as “chain shot”). The configuration of the cab 60 will be described later.

  The boom 70 is attached to the swivel base 20 on the side of the cab 60. The boom 70 is driven by supplying hydraulic oil to the hydraulic cylinder 71.

  The arm 80 is attached to the tip of the boom 70. The arm 80 is driven by supplying hydraulic oil to the hydraulic cylinder 81.

  The harvester device 90 includes a main body 91, a link portion 92, a gripping portion 93, a wood feeding portion 94, a branching blade 95, and a chainsaw 96. The main body 91 is supported by the link portion 92 so as to be swingable up and down. The link part 92 is attached to the tip of the arm 80. The gripping part 93 grips the timber to be cut or the timber after cutting. The wood feeding unit 94 feeds off the cut-timber wood gripped by the gripping unit 93. The branching blade 95 cuts the branch of the wood sent out by the wood feeding part 94. The chainsaw 96 cuts the root of the logging target wood that is gripped by the grip portion 93. Further, the chainsaw 96 cuts the felled timber gripped by the gripping portion 93 at a predetermined interval. When a chain shot occurs due to breakage of the blade of the chainsaw 96 during the cutting of the wood, the broken pieces of the blade stop in a state of being sunk into the front window 61 having high penetration resistance.

(Configuration of cab 60)
FIG. 2 is a front view of the cab 60 according to the embodiment.

  The cab 60 includes a front window 61, a lower window 62, a front window frame 63, a slit portion 64, a wiper 65, and a metal plate 66.

  The front window 61 is affixed to the front window frame 63. The front window 61 is made of polycarbonate and has higher penetration resistance than general tempered glass. On the other hand, the front window 61 is formed thicker than that made of tempered glass in order to obtain the same mechanical strength as that of tempered glass. The configuration of the front window 61 will be described later. In the present embodiment, it is assumed that the front window made of tempered glass is replaced with the front window 61 made of polycarbonate.

  The lower window 62 is inserted into the slit portion 64. Like the front window 61, the lower window 62 is made of polycarbonate and has high penetration resistance. The configuration of the lower window 62 will be described later. In the present embodiment, a scene is assumed in which the lower window made of tempered glass is replaced with the lower window 62 made of polycarbonate.

  The front window frame 63 is a frame formed in a rectangular ring shape. A front window 61 is attached to the front window frame 63. The front window frame 63 is fitted into a front opening formed in the front wall 60 a of the cab 60. The front window frame 63 can be stored under the ceiling by sliding upward through a window opening / closing mechanism (not shown). However, in order to protect the operator from the chain shot of the blades of the chainsaw 96, the front window frame 61 is closed during the tree making operation.

  The slit portion 64 is formed on the inner peripheral surface of the front opening formed in the front wall 60a. The slit portion 64 supports both sides and the lower side of the lower window 62.

  The wiper 65 is attached to the front wall 60a. The wiper 65 reciprocates on the outer surface of the front window 61 to wipe off raindrops and dirt adhering to the outer surface of the front window 61. In this embodiment, even after the front window made of tempered glass is replaced with the front window 61 made of polycarbonate, it is not necessary to specially adjust the attachment state of the wiper 65 to the front window 61. This is because the polycarbonate front window 61 is thicker than the tempered glass front window, but the outer surface of the polycarbonate front window 61 is kept at the same position as the outer surface of the tempered glass front window. Because. This point will be described later.

  The metal plate 66 is disposed inside the cab 60 and is fixed to the lower frame of the front window frame 63 by welding. The metal plate 66 covers the boundary between the front window 61 and the lower window 62 from the inside. As a result, the flying object is prevented from entering the cab 60 from the gap between the front window 61 and the lower window 62.

(Configuration of front window 61)
FIG. 3 is a plan view of the front window 61. 4 is a cross-sectional view taken along line AA in FIG. FIG. 5 is a partially enlarged view of FIG.

  As shown in FIG. 3, the front window 61 has an outer edge portion 61a and an inner portion 61b. The outer edge portion 61a is formed in a rectangular ring shape. The inner part 61b is surrounded by the inner side of the outer edge part 61a.

  As shown in FIG. 4, the outer edge portion 61 a is disposed so as to cover the front of the front window frame 63. The outer edge portion 61 a is bonded to the front window frame 63 via the dam rubber 101. The inner side part 61b protrudes into the cab 60 rather than the outer edge part 61a.

  As shown in FIG. 5, the outer edge portion 61a and the inner portion 61b form a planar outer surface 61S. That is, the outer surface of the outer edge portion 61a is flush with the outer surface of the inner portion 61b. The inner surface 61Ta of the outer edge portion 61a faces the front surface 63S of the front window frame 63. A dam rubber 101 is interposed between the inner surface 61Ta and the front surface 63S. The inner surface 61Tb of the inner side portion 61b enters the cab 60 more than the inner surface 61Ta of the outer edge portion 61a. Therefore, the thickness Lb of the inner part 61b is larger than the thickness La of the outer edge part 61a. The thickness La of the outer edge portion 61a is about the same as a general tempered glass front window (for example, about 2 mm to 15 mm). The thickness Lb of the inner portion 61b is a thickness (for example, about 5 mm to 30 mm) that can exhibit penetration resistance for functioning as a chain shot guard.

  As shown in FIG. 5, an intermediate portion 61c having a thickness Lc is formed between the outer edge portion 61a and the inner portion 61b. The thickness Lc gradually increases from the thickness La to the thickness Lb. Thereby, the outer edge part 61a and the inner side part 61b are smoothly connected.

(Configuration of lower window 62)
FIG. 6 is a plan view of the lower window 62. 7 is a cross-sectional view taken along the line BB in FIG. 8 is a cross-sectional view taken along the line CC of FIG.

  As shown in FIG. 6, the lower window 62 has an outer edge portion 62a and an inner portion 62b. The outer edge 62a is formed in a rectangular ring shape. The inner side part 62b is surrounded by the inner side of the outer edge part 62a.

  As shown in FIGS. 7 and 8, the outer edge portion 62 a is sandwiched between the slit portions 64 of the cab 60. Thereby, the outer edge part 62a is supported by the slit part 64 so that insertion / extraction is possible. The inner side part 62b protrudes into the cab 60 rather than the outer edge part 62a.

  Specifically, the outer edge portion 62a and the inner portion 62b form a planar outer surface 62S. That is, the outer surface of the outer edge portion 62a and the outer surface of the inner portion 62b are flush with each other. On the other hand, the inner surface 62Tb of the inner side portion 62b enters the cab 60 more than the inner surface 62Ta of the outer edge portion 62a. Therefore, the thickness Mb of the inner side part 62b is larger than the thickness Ma of the outer edge part 62a. The thickness Ma of the outer edge portion 62a may be equal to the thickness La of the outer edge portion 61a of the front window 61 described above, and the thickness Mb of the inner portion 62b is equal to the thickness Lb of the inner portion 61b of the front window 61 described above. It should be equivalent.

  As shown in FIG. 7, an intermediate portion 62c having a thickness Mc is formed between the outer edge portion 62a and the inner portion 62b. The thickness Mc gradually increases from the thickness Ma to the thickness Mb, whereby the outer edge portion 62a and the inner portion 62b are smoothly connected.

  Further, as shown in FIG. 8, the outer surface 62S of the lower window 62 is flush with the outer surface 61S of the front window 61. The boundary between the front window 61 and the lower window 62 is covered from the inside by a metal plate 66 fixed to the front window frame 63.

(Function and effect)
(1) In the present embodiment, the front window 61 is provided on the inner side of the outer edge portion 61a (an example of the first outer edge portion) bonded to the front surface 63S of the front window frame 63, and from the outer edge portion 61a. And an inner portion 61 b (an example of a first inner portion) that protrudes into the cab 60.

  Thus, by thinning the outer edge portion 61a bonded to the front window frame 63, the outer surface 61S of the front window 61 protrudes forward while sufficiently securing the thickness of the inner portion 61b that functions as a chain shot guard. It is suppressed. Therefore, even when the front window 61 made of tempered glass is replaced with the front window 61 made of polycarbonate, the proper grounding property of the wiper 65 with respect to the front window 61 can be maintained.

  (2) The lower window 62 is provided inside the outer edge portion 62a (an example of the second outer edge portion) sandwiched between the slit portions 64 of the cab 60 and the outer edge portion 62a, and protrudes into the cab 60 from the outer edge portion 62a. An inner portion 62b (an example of a second inner portion).

  Therefore, by thinning the outer edge portion 62a sandwiched between the slit portions 64, the outer surface 62S of the lower window 62 and the outer surface 61S of the front window 61 face the surface while sufficiently securing the thickness of the inner portion 62b that functions as a chain shot guard. Can be placed in one. Therefore, the appearance quality of the lower window 62 can be improved while expanding the visual field in front and lower of the operator.

  (3) The boundary between the front window 61 and the lower window 62 is covered from the inside by a metal plate 66 fixed to the front window frame 63. Therefore, it is possible to suppress the flying object from entering the cab 60 through the gap between the front window 61 and the lower window 62.

(Other embodiments)
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

  (A) In the above embodiment, the cab 60 includes the lower window 62, but the lower window 62 may not be included.

  (B) In the above embodiment, the lower window 62 is inserted into the slit 64 so as to be insertable / removable, but may be fixed to the slit 64.

  (C) In the above embodiment, the metal plate 66 is fixed to the lower frame of the front window frame 63, but the metal plate 66 may not be attached.

  (D) In the above embodiment, the front window 61 is made of polycarbonate, but is not limited thereto. As a constituent material of the front window 61, a resin material having penetration resistance equal to or higher than that of polycarbonate can be used.

DESCRIPTION OF SYMBOLS 10 ... Lower traveling body, 20 ... Swivel base, 30 ... Counterweight, 40 ... Equipment room, 50 ... Engine room, 60 ... Cab, 61 ... Front window, 61a ... Outer edge part, 61b ... Inner part, 62 ... Lower window, 62a ... outer edge portion, 62b ... inner side portion, 63 ... front window frame, 64 ... slit portion, 65 ... wiper, 66 ... metal plate, 70 ... boom, 80 ... arm, 90 ... harvester device, 91 ... main body, 92 ... link , 93 ... gripping part, 94 ... wood feeding part, 95 ... branching blade, 96 ... chainsaw, 100 ... work vehicle

Claims (3)

With the cab,
A harvester device disposed in front of the cab and including a chainsaw;
A rectangular annular front window frame attached to the cab;
A resin front window fixed to the front window frame;
With
The front window includes a first outer edge portion that is bonded to the front surface of the front window frame, a first inner edge portion that is provided inside the first outer edge portion, and protrudes into the cab from the first outer edge portion. Have
The outer surface of the front window is formed in a planar shape by the first outer edge portion and the first inner portion,
Work vehicle. With the cab,
A harvester device disposed in front of the cab and including a chainsaw;
A rectangular annular front window frame attached to the cab;
A resin front window fixed to the front window frame;
And a lower window attached to the cab below the said front window frame,
The front window includes a first outer edge portion that is bonded to the front surface of the front window frame, a first inner edge portion that is provided inside the first outer edge portion, and protrudes into the cab from the first outer edge portion. Have
The cab has slit portions that support both sides and the lower side of the lower window,
The lower window includes a second outer edge portion sandwiched between the slit portions, and a second inner portion provided inside the second outer edge portion and projecting into the cab from the second outer edge portion.
Work vehicle. A metal plate disposed in the cab and covering a boundary between the front window and the lower window;
The metal plate is fixed to the lower frame of the front window frame,
The work vehicle according to claim 2.

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