Machine canopy

Abstract

To provide a canopy of a work machine having an excellent draining property.SOLUTION: A canopy 9 of a work machine 1 in which a machine body 3 performing work is mounted on a lower traveling body 2, includes a roof plate 10 covering an upper side of an operation space 7 provided on the machine body 3 and at least two columnar supports 31L, 31R supporting the roof plate 10 while the operation space 7 is opened. The roof plate 10 has a gutter part 20 having a groove shape extending along the edge of a lower end part of a downward inclined surface part 12 which is downwardly tilted. The gutter part 20 is inclined downward from its one end to the other end.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The disclosed technology relates to a canopy for a work machine such as a hydraulic excavator, and more particularly to a drainage structure for a roof of the canopy. [Background technology]

[0002] Among this type of work machine, there is a model equipped with a canopy, which means that the surroundings of the driving space where the operator sits are open and only the upper part is covered with a roof. Since the canopy has a simple structure, it is mainly used in small models.

[0003] In the case of a canopy, the operator is surrounded by open spaces, so if rainwater drips from the edge of the roof during rainy days, it can obstruct visibility and make work difficult. There is also a risk of rainwater entering the driving space.

[0004] In addition, if water accumulates on the roof, there is a problem that the operator will unexpectedly get wet when operating the work machine, even when it is not raining. Therefore, in order to solve such problems specific to canopies, various ideas have been proposed for the roof drainage structure.

[0005] For example, Patent Document 1 discloses a forklift head guard in which the edge of the top plate covering the upper part of the driver's seat is tilted outward and a rain gutter is provided extending along the lower end of the slope, allowing water to drain from both ends of the rain gutter.

[0006] Patent Document 2 discloses a head guard that overcomes the drawbacks of the head guard of Patent Document 1 by curving the top plate so that it bulges slightly upwards and allows water to collect and drain at the four corners of the top plate.

[0007] Patent Document 3 (by the present applicant) discloses a canopy that can prevent water that accumulates on the roof from flowing down the sides. The front edge of the forward-inclined roof is provided with a raised portion to prevent rainwater dripping down and obstructing visibility.

[0008] As a result, a recess extending to the left and right is formed at the front edge of the roof, and when water accumulates in the recess, it is drained from both ends along the supports. A main dam plate and an auxiliary dam plate are provided near both ends of the recess to prevent the drainage water from flowing down the sides of the roof. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Publication No. 8-127499 [Patent Document 2] JP 2005-314052 A [Patent Document 3] Patent No. 5799976 Summary of the Invention [Problem to be solved by the invention]

[0010] Water may accumulate on the tabletop in a structure in which only the edges are inclined, as in Patent Document 1. In addition, it is difficult to process the tabletop so that it curves slightly, as in Patent Document 2.

[0011] Normally, the tabletop is thin and easily warps when it is welded to the support. In addition, the tabletop is exposed to direct sunlight and becomes very hot in the summer, so there is a risk that it may warp and deform due to thermal expansion. If the tabletop warps, there is a risk that water will accumulate even if it is tilted.

[0012] Therefore, in a structure in which only the edges are inclined, as in Patent Document 1, or in a structure in which the roof is only slightly curved, as in Patent Document 2, there is a risk of water accumulating on the roof.

[0013] In addition, with these technologies, rainwater that has been received on the roof is collected in a long, thin recess (gutter) that runs roughly horizontally along the edge of the roof, and is then drained from a drainage outlet located at the end of the gutter. Therefore, when the roof sways in the longitudinal direction of the gutter, the water in the gutter moves back and forth, and it takes time for the water to completely drain away. In other words, water is likely to accumulate in the gutter, and if the vehicle turns in this state, there is a risk that water will splash on the operator.

[0014] For this reason, the canopy of Patent Document 3 is provided with a main stopper plate and an auxiliary stopper plate to prevent water accumulated on the roof from flowing down the sides. However, as long as water accumulates on the roof, the risk of the operator getting wet during work cannot be avoided.

[0015] Therefore, an object of the disclosed technology is to provide a canopy for a work machine with excellent drainage properties. [Means for solving the problem]

[0016] The disclosed technology relates to a canopy for a work machine in which a machine body that performs work is mounted on a lower traveling body.

[0017] The canopy includes a roof plate that covers the upper part of an operating space provided in the machine body, and at least two pillars that support the roof plate with the operating space open. The roof plate has a downwardly inclined surface portion that slopes downward in a predetermined direction, and a groove-shaped gutter portion that extends along the edge of the lower end portion of the downwardly inclined surface portion. The gutter portion slopes downward from one end to the other end.

[0018] That is, the roof panels that make up the roof of this canopy have a downwardly sloping surface and a groove-shaped gutter that extends along the edge of the lower end of the downwardly sloping surface. Therefore, rainwater that falls on the roof panel flows down the downwardly sloping surface and into the gutter.

[0019] Since the gutter section slopes downward from one end to the other in the longitudinal direction, rainwater that flows into the gutter section continues to flow toward the other end of the gutter section. Rainwater that falls on the roof shingles always flows down over the shingles without accumulating on the shingles. Rainwater does not accumulate on the shingles. This allows for a roof with excellent drainage. Operators are less likely to get wet.

[0020] The canopy may also be configured so that the other end of the gutter portion is positioned opposite an entrance for entering and exiting the driving space.

[0021] In this way, the water in the gutter will flow to the opposite side of the entrance where the operator enters and exits, making it even more difficult for the operator to get wet. Also, since the water drips down from the opposite side of the entrance, it is unlikely for the operator to notice it.

[0022] The canopy may also be configured so that the other end of the gutter portion is positioned behind an entrance for getting on and off the driving space.

[0023] If the drain is behind the entrance, even if water drips, it is unlikely to interfere with the operator's work. In addition, the water in the gutter is unlikely to get into the driving space or engine room. Furthermore, any foreign objects that get into the gutter will collect at the bottom of the gutter near the entrance, making cleaning easy.

[0024] The canopy may also be configured such that an end of the gutter section is connected to the support pillar, a vertical plate is provided at the connection between the end of the gutter section and the support pillar and extends along the top of the support pillar to cover the end of the gutter section, and a drainage outlet is formed at the lower edge of the vertical plate.

[0025] In this way, the rainwater flowing down the gutter is stopped by the vertical plate, so it does not flow down the gutter with the same force. Since the water is discharged through the drainage outlet, it can be discharged gently from the gutter. This prevents the rainwater from gushing out or splashing out to the side from the edge of the gutter.

[0026] A drain outlet is formed at the lower edge of the vertical plate that extends along the top of the support, so the water that comes out of the drain outlet flows down along the support, preventing water from boiling over or splashing around the drain outlet.

[0027] The canopy may also be provided with a second vertical plate at the connection between the end of the gutter section and the support pole, extending along the upper part of the support pole and separated from the outer surface of the vertical plate by a gap.

[0028] The rainwater coming out of the drain is prevented from escaping by the second vertical plate, so that it is guided to flow down along the support.

[0029] The canopy may also be configured such that the cross-sectional shape of the gutter portion has an inverted triangular shape.

[0030] This makes it easy to process the gutter by bending the roof panel.

[0031] The canopy may also be configured such that the vertical plate having a first opening and a second opening at at least two locations on the lower edge is provided at both ends of the gutter section, the first opening forming the drain outlet at one end of the gutter section, and the second opening forming the drain outlet at the other end of the gutter section.

[0032] When a gutter portion having an inverted triangular cross section is tilted in the longitudinal direction, the position of its bottom (lowest part) may shift at both ends. In that case, if a drain outlet is to be provided at the lowest part, the openings in the vertical plates at both ends must be provided in different positions. This requires two vertical plates of different shapes, which increases the number of parts. It is easy to confuse the vertical plates, which can lead to machining errors. In contrast, by forming two openings in advance that correspond to the positions of the bottoms at both ends in this way, the vertical plates can be shared. This reduces the number of parts and prevents machining errors.

[0033] The canopy may also be configured such that the downwardly inclined surface portion and the gutter portion are formed by bending a single plate material.

[0034] In this way, the roof panel can be formed by bending a single sheet of material. The roof panel is formed three-dimensionally and asymmetrically from a single sheet of material. Therefore, even a thin roof panel has excellent strength and rigidity. Deflection deformation can be effectively suppressed.

[0035] The canopy may also be configured such that an inclination angle of the gutter portion is set to be larger than an inclination angle of the downwardly sloping surface portion.

[0036] This makes the roof shingles more three-dimensional and asymmetrical, improving their strength and rigidity. Rainwater that falls into the gutter section flows more strongly due to the larger slope, and flows smoothly down toward the other end without remaining in the gutter section. This improves drainage and prevents puddles from forming. Effect of the Invention

[0037] According to the disclosed technology, it is possible to stably and effectively prevent water from accumulating on the roof, thereby preventing the operator from getting wet. [Brief description of the drawings]

[0038] [Figure 1] 1 is a schematic diagram showing an example of a work machine. [Diagram 2] FIG. 2 is a schematic perspective view of an upper rotating body (attachments are omitted). [Diagram 3] FIG. 2 is a schematic perspective view of a canopy. [Figure 4] FIG. [Diagram 5] FIG. 1 is a schematic diagram showing a roof panel. [Figure 6] FIG. 2 is an enlarged view of the left and right front corners of the roof. [Figure 7] 13 is a diagram for explaining the relationship between the vertical plate and the gutter portion. FIG. [Figure 8] 10A and 10B are diagrams illustrating foreign object protection covers as application examples, in which (a) and (b) show different covers. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0039] Hereinafter, an embodiment of the disclosed technology will be described. However, the following description is merely an example. The up / down, left / right, and front / rear directions used in the description are indicated by arrows in the drawings.

[0040] (Work Machinery) FIG. 1 illustrates a hydraulic excavator 1 as a working machine to which the disclosed technology is applied. This hydraulic excavator 1 is a relatively small model with a small rear swing radius. The disclosed technology is suitable for, but not limited to, small models. It can also be applied to medium and large models.

[0041] The hydraulic excavator 1 is generally composed of a lower traveling body 2 and an upper rotating body 3 (machine body) mounted on the lower traveling body 2 so as to be freely rotatable. The lower traveling body 2 has a pair of crawlers 2a, 2a on both the left and right sides. These crawlers 2a, 2a allow the lower traveling body 2 to travel freely. A dozer 2b is provided at the front end of the lower traveling body 2. The dozer 2b performs work such as leveling the ground.

[0042] An attachment 4 is attached to the front of the upper rotating body 3. The attachment 4 is composed of a boom 4a, an arm 4b, a bucket 4c, a hydraulic cylinder 4d, etc. In the case of this model, the base end portion of the boom 4a is rotatably supported by a bearing portion 2d (see FIG. 2) provided in the center of the upper rotating body 3 in the vehicle width direction via a swing bracket 2c that can swing left and right. The arm 4b is rotatably supported by the tip portion of the boom 4a. The bucket 4c is rotatably supported by the tip portion of the arm 4b.

[0043] The boom 4a, the arm 4b, and the bucket 4c are provided with hydraulic cylinders 4d, respectively. The hydraulic cylinders 4d are hydraulically controlled to extend and retract, causing the boom 4a, the arm 4b, and the bucket 4c to rotate about their respective rotation axes. As a result, the attachment 4 performs work such as excavation.

[0044] An engine room 5 covered with a cover 5a is provided at the rear of the upper rotating body 3. Inside the engine room 5, devices such as an engine are housed.

[0045] 2, a covered side machine room 6 is provided on the right side of the upper rotating body 3. A fuel tank, a hydraulic oil tank, etc. are installed in the side machine room 6. An operation space 7 where an operator performs operations is provided on the left side of the upper rotating body 3.

[0046] An operator's seat 7a on which an operator sits, an operation lever 7b operated by the operator, and the like are provided in the operator's space 7. As shown in Fig. 1, an entrance 8 for getting on and off the operator's space 7 is provided on the left side of the upper rotating body 3. In detail, the entrance 8 is provided in the front part on the left side of the operator's space 7.

[0047] (Canopy) A canopy 9 that protects the driving space 7 is installed on the upper rotating body 3, with the upper part covered by a roof 9a and open in the front-rear and left-right directions. As shown in Figures 3 and 4, the canopy 9 has a roof panel 10 that constitutes the roof 9a, and a frame 30 that supports the roof panel 10. The frame 30 is attached to the upper rotating body 3 so that the roof panel 10 covers the upper part of the driving space 7.

[0048] As shown in Fig. 4, the frame 30 is composed of a pair of pillars 31L, 31R, a front mounting member 32, a rear mounting member 33, a front installation member 34, a middle installation member 35, and a rear installation member 36. Each of the pair of pillars 31L, 31R has the same shape. Each of the pillars 31L, 31R is formed into an arch shape by bending a cylindrical steel pipe.

[0049] Specifically, each of the pillars 31L, 31R is composed of a front pillar portion 31a, a front bent portion 31b, a beam portion 31c, a rear bent portion 31d, a rear pillar portion 31e, etc. The front pillar portion 31a is a portion disposed so as to extend in the vertical direction along each of the left and right sides of the front surface of the driving space 7. The front bent portion 31b is a portion curved in a semicircular shape from the upper end of the front pillar portion 31a toward the rear.

[0050] The beam portion 31c is a portion that is connected to the front bent portion 31b, and extends rearward along the left and right edges of the upper surface of the driving space 7. When the frame 30 is attached to the upper rotating body 3, the beam portion 31c is configured to be slightly inclined downward toward the front.

[0051] The rear bent portion 31d is a portion that is curved in a semicircular shape downward from the rear end of the beam portion 31c. The rear support portion 31e is a portion that is connected to the rear bent portion 31d, and is disposed so as to extend in the vertical direction along each of the left and right sides of the rear surface of the driving space 7. The rear support portion 31e is shorter than the front support portion 31a.

[0052] The rear support portion 31e is also formed in a curved shape when viewed from the side, unlike the front support portion 31a. That is, the rear support portion 31e has an upper portion that is connected to the rear bent portion 31d and is inclined downward and gradually toward the rear, and a lower portion that is connected to the upper portion and is inclined downward and gradually toward the front.

[0053] The front mounting member 32 is made of a plurality of steel plates and is fixed to the lower end portion of each of the front support columns 31a by welding. The front mounting member 32 is disposed so as to extend along the lower edge of the front surface of the driving space 7, specifically, along the front edge of the floor surface of the driving space 7.

[0054] The rear mounting member 33 is also made of a plurality of steel plates, and is fixed by welding to the lower end portions of the rear support portions 31e. The rear mounting member 33 is disposed so as to extend along the lower edge of the rear surface of the driving space 7, specifically, along the front edge of the upper portion of the cover 5a covering the engine room 5.

[0055] Each of the front installation member 34, the middle installation member 35, and the rear installation member 36 is made of a member formed by bending a strip-shaped steel plate so that the cross section has a predetermined curved shape. Each end of the front installation member 34 is fixed by welding to the rear end portion of each front bent portion 31b and the front end portion of each beam portion 31c. Each end of the middle installation member 35 is fixed by welding to the middle portion of each beam portion 31c. Each end of the rear installation member 36 is fixed by welding to each rear bent portion 31d.

[0056] In particular, the front installation member 34 is disposed so as to be located below the asymmetrical gutter section 20 described later. As a result, when viewed from the operator operating in the driving space 7, the gutter section 20 is covered by the front installation member 34 and cannot be seen. Therefore, even if the roof panel 10 has an unbalanced shape, it looks good.

[0057] A stopper plate 40 (vertical plate) and a guide plate 50 (second vertical plate) are provided around each front bent portion 31b (these will be described separately later). A pair of erection bars 37, 37 are erected at a distance above and below the lower portion of the pair of front support portions 31a, 31a. In this manner, the frame 30 is formed into a structure that ensures a predetermined strength and rigidity. With the roof plate 10 placed on the top of the frame 30, the roof plate 10 is welded and fixed to the frame 30. This forms the roof 9a of the canopy 9.

[0058] (Roof shingle structure) The roof panel 10 is shown in Figures 4 and 5. Figure 5 shows the roof panel 10 as viewed from above, from the right side, and from the front. The roof panel 10 is formed by bending a substantially rectangular steel plate (plate material). As a result, the roof panel 10 has a rear eaves portion 11, a downwardly inclined surface portion 12, a gutter portion 20, and an upwardly inclined surface portion 13.

[0059] The rear overhanging portion 11 is a band-shaped portion extending in the left-right direction, and is disposed between the pair of rear bent portions 31d, 31d when viewed from above, as shown in Fig. 3. When the frame 30 is attached to the upper rotating body 3, the rear overhanging portion 11 forms an inclined surface that slopes downward toward the rear.

[0060] The length in the front-to-rear direction (front-to-rear width) of the rear eaves portion 11 is relatively short. The inclination angle of the rear eaves portion 11 is relatively large. As a result, rainwater that falls on the rear eaves portion 11 flows down along the rear eaves portion 11. There is no risk of water accumulating in the rear eaves portion 11.

[0061] The downwardly inclined surface portion 12 is a rectangular plate-shaped portion continuing to the front edge of the rear eaves portion 11, and is disposed between a pair of beam portions 31c, 31c when viewed from above. The majority of the roof panel 10 is made up of the downwardly inclined surface portion 12. When the frame 30 is assembled to the upper rotating body 3, the downwardly inclined surface portion 12 forms an inclined surface that slopes slightly downward from its rear end toward the front. The downwardly inclined surface portion 12 is an approximately flat surface. The rear and front edges of the downwardly inclined surface portion 12 extend in the left-right direction and approximately horizontally, parallel to each other but offset from each other in the up-down direction.

[0062] The front end, middle part, and rear end part of the downward inclined surface portion 12 are supported by the front installation member 34, the middle installation member 35, and the rear installation member 36, respectively. Therefore, even a thin steel plate is unlikely to deform. The inclined flat surface of the downward inclined surface portion 12 can be stably secured.

[0063] Therefore, rainwater that falls on the downward inclined surface portion 12, or in effect, on the roof panel 10, flows down forward. The formation of puddles on the downward inclined surface portion 12 can be prevented.

[0064] The gutter portion 20 is a groove-shaped portion extending in the left-right direction along the front edge of the downward inclined surface portion 12, in other words, along the lower edge of the downward inclined surface portion 12. When viewed from above, the gutter portion 20 is disposed between the pair of front bent portions 31b, 31b. Rainwater that flows down the downward inclined surface portion 12 enters the gutter portion 20.

[0065] The gutter portion 20 of this embodiment has a cross-sectional shape of an inverted triangle. That is, the lowermost portion (bottom) of the gutter portion 20 is formed by the apex of the triangle in the cross-section, and the side surface of the gutter portion 20 is formed by two sides located on either side of the apex of the triangle in the cross-section.

[0066] Specifically, the gutter portion 20 has a first inclined surface 21 and a second inclined surface 22 whose lower edges are connected to each other. The first inclined surface 21 is a portion that slopes downward toward the front from the front edge of the downwardly inclined surface portion 12. The second inclined surface is a portion that slopes upward toward the front from the lower edge of the first inclined surface 21. The inclination angle of the second inclined surface 22 is larger than that of the first inclined surface 21. Note that each of the first inclined surface 21 and the second inclined surface 22 is preferably a flat surface, but may be a curved plane as long as no depression is generated.

[0067] The gutter portion 20 also slopes downward from one end to the other end in the longitudinal direction. In this embodiment, the gutter portion 20 slopes downward from its left end to its right end. The right end of the gutter portion 20 is the lowest. In other words, the lowest part of the gutter portion 20 is located on the opposite side of the entrance 8. The cross-sectional area of ​​the gutter portion 20 gradually increases in a similar shape from one end (left end 23) to the other end (right end 24) in the longitudinal direction.

[0068] The front edge of the downwardly inclined surface portion 12 (upper edge 21a of the first inclined surface 21) extends in the left-right direction and generally horizontally. Therefore, the lower edge 21b of the first inclined surface 21 (the bottom of the groove portion) is inclined with respect to the upper edge 21a of the first inclined surface 21, and is located relatively further forward on the right side than on the left side. The length of the first inclined surface 21 in the front-rear direction is longer on the right side than on the left side.

[0069] The upper edge 22a of the second inclined surface 22 is inclined with respect to the left-right direction and extends approximately horizontally. The upper edge 22a of the second inclined surface 22 is also inclined with respect to the lower edge 21b of the first inclined surface 21, and is located relatively further forward on the right side than on the left side. The length of the second inclined surface 22 in the front-rear direction is also longer on the right side than on the left side. However, the amount of change in the length in the front-rear direction is smaller for the second inclined surface 22.

[0070] 5, the length of the upper surface of gutter portion 20, i.e., the receiving opening, in the front-rear direction increases from the left to the right. The inclination angle θ2 of gutter portion 20 in the left-right direction is set to be larger than the inclination angle θ1 of downwardly inclined surface portion 12 in the front-rear direction.

[0071] The upwardly inclined surface portion 13 is a triangular plate-shaped portion continuing to the front edge of the gutter portion 20 (the upper edge 22a of the second inclined surface 22), and is disposed between the pair of front bent portions 31b, 31b when viewed from above. The upwardly inclined surface portion 13 is inclined so as to be slightly upwardly inclined toward the front. The length of the second inclined surface 22 in the front-rear direction is longer on the left side than on the right side.

[0072] The front edge of the upwardly inclined surface portion 13 extends in the left-right direction when viewed from above (substantially parallel to the front and rear edges of the downwardly inclined surface portion 12). The position of the front edge of the upwardly inclined surface portion 13 is high. Therefore, the upwardly inclined surface portion 13 can prevent rainwater from flowing down in front of the roof panel 10, that is, to the front surface of the driving space 7.

[0073] As described above, the roof panel 10 is formed by bending a single steel plate three-dimensionally and asymmetrically. Therefore, even if the steel plate is thin, it has excellent strength and rigidity. It can effectively suppress bending deformation.

[0074] (dam plate, guide plate) 6 shows an enlarged view of the left and right front corners of the roof 9a. The left and right ends of the gutter 20 are connected to the front bent portions 31b of the left and right pillars 31L, 31R. More specifically, the side edges of the roof panel 10 are welded and fixed to the inner portions of the pillars 31L, 31R so as to fit along the pillars 31L, 31R. As a result, the left and right ends 23, 24 of the gutter 20 (more specifically, the rear portions of the left and right ends 23, 24) are welded and fixed to the inner portions of the left and right front bent portions 31b, 31b.

[0075] A stopper plate 40 is provided at each of the connection portions between the ends 23, 24 of the gutter portion 20 and the supports 31L, 31R. The stopper plate 40 is erected on the upper part of the front bent portion 31b, extending in the front-rear direction along the front bent portion 31b. All of these stopper plates 40 are made of the same plate-shaped metal fittings.

[0076] 7, the dam plate 40 has a lower edge 40a curved along the curved surface of the upper part of the front bent portion 31b, and the lower edge 40a is fixed to the upper part of the front bent portion 31b by welding. As a result, the upper edge of the dam plate 40 is formed to extend linearly along the upward inclined surface portion 13.

[0077] The left and right ends 23, 24 of the gutter portion 20 are blocked by these blocking plates 40. That is, the front portions of the left and right ends 23, 24 of the gutter portion 20 are located above the front bent portion 31b and are therefore not connected to the front bent portion 31b. The inner surface of the blocking plate 40 is fixed by welding to the front portions of the left and right ends 23, 24 of the gutter portion 20. The left and right ends 23, 24 of the gutter portion 20 are blocked by the front bent portion 31b and the blocking plate 40.

[0078] Arc-shaped cutouts (openings) are formed at two separate locations, front and rear, on the lower edge 40a of the dam plate 40. Specifically, a first opening 41 is located on the rear side, and a second opening 42 is located on the front side. By connecting the dam plate 40 to the supports 31L, 31R, the first opening 41 and the second opening 42 form drainage openings 43L, 43R.

[0079] That is, the first opening 41 forms the drain outlet 43L at the left end of the gutter portion 20, and the second opening 42 forms the drain outlet 43R at the right end of the gutter portion 20. As described above, the gutter portion 20 has an inverted triangular cross section. Moreover, by slanting downward from the left side to the right side, the positions of the bottoms (lowest parts) are shifted in the front-rear direction at the left and right ends.

[0080] If drainage ports 43L, 43R are to be provided at the bottom, the openings in the dam plate 40 must be provided in different positions on the left and right. Since different dam plates 40 are required for the left and right, the number of parts increases. Since it is easy to mistake the dam plate 40, there is a risk of machining errors. By forming two openings in the dam plate 40 in advance that correspond to the left and right bottom positions in this way, the number of parts can be reduced and machining errors can be prevented.

[0081] A guide plate 50 is also provided at each of the connection portions between the ends 23, 24 of the gutter portion 20 and the supports 31L, 31R. The guide plate 50 is erected on the upper part of the front bent portion 31b with a gap between it and the outer surface of the blocking plate 40.

[0082] The guide plate 50 is longer in the front-to-rear direction than the dam plate 40. The rear end of the guide plate 50 is located rearward of the gutter section 20. The front end of the guide plate 50 extends forward beyond the dam plate 40. A hanging hole 51 is formed in the rear end of each dam plate 40. When the canopy 9 is attached to the upper rotating body 3 or removed from the upper rotating body 3, it is hung by a crane or the like.

[0083] The hanging holes 51 are used at that time. That is, the guide plate 50 is also used as a front bracket for hanging the canopy 9. This reduces the number of parts. Note that rear brackets 52 for hanging the canopy 9 are attached to each of the rear bent portions 31d (see FIG. 4).

[0084] (Roof drainage) By providing the roof panel 10 with this structure, the drainage properties of the roof 9a are improved, and water accumulation on the roof 9a can be stably and effectively prevented.

[0085] That is, as described above, the front edge (upper edge 21a of the first slope 21) of the downwardly inclined surface portion 12 extends in the left-right direction and approximately horizontally. Therefore, rainwater that falls on the downwardly inclined surface portion 12 flows down in the same manner over the entire width direction, as shown by the arrow Y1 in FIG. 3, and enters the gutter portion 20.

[0086] The second slope 22 has a larger inclination angle than the first slope 21. Therefore, rainwater that flows down into the gutter portion 20 flows down along the first slope 21 and is received by the second slope 22. If the rainwater is not received by the second slope 22, it is received by the upwardly inclined surface portion 13. The upwardly inclined surface portion 13 promotes drainage into the gutter portion 20.

[0087] The gutter portion 20 slopes downward from its left end to its right end. Moreover, the slope is greater than the slope of the downwardly inclined surface portion 12. Therefore, rainwater that flows down into the gutter portion 20 does not remain in the gutter portion 20, but flows smoothly down from the left side to the right side, as shown by the arrow Y2 in FIG. 3.

[0088] Moreover, the gutter 20 has a larger inlet and capacity on the right side than on the left side. Therefore, the right side is more likely to receive water than the left side. Even if the roof panel 10 swings left and right, the water in the gutter 20 tends to flow to the right side, so the water in the gutter 20 tends to pool on the right side rather than on the left side where the entrance 8 is located.

[0089] The capacity of the left side of the gutter portion 20 is small, but the capacity of the upward inclined surface portion 13 is large on the left side. Therefore, even if water overflows from the gutter portion 20, it is received by the upward inclined surface portion 13, so that the water can be prevented from spilling down from the roof panel 10.

[0090] Both ends 23, 24 of the gutter section 20 are blocked by the blocking plate 40. As a result, even if water flows forcefully through the gutter section 20, it does not flow down from the gutter section 20 with the same force. Since water is drained through the drainage openings 43L, 43R, it can be drained gently from the gutter section 20. This prevents water from gushing out or splashing sideways from the ends 23, 24 of the gutter section 20.

[0091] Since the drainage outlets 43L, 43R are located at the bottom of the gutter section 20 at both the left and right ends 23, 24 of the gutter section 20, water in the gutter section 20 can be smoothly drained from either the left or right side. In other words, water is unlikely to accumulate in the gutter section 20. Therefore, even if the vehicle turns in this state, water can be prevented from splashing on the operator.

[0092] Since the drainage ports 43L, 43R are located at the lowest part of the gutter portion 20 which is inclined in the longitudinal direction, water does not accumulate in the gutter portion 20. This makes it possible to prevent the operator from getting wet.

[0093] Furthermore, since the drain outlets 43L, 43R are located at the top of the supports 31L, 31R, the water leaving the drain outlets 43L, 43R flows down along the supports 31L, 31R. This prevents water from spilling or splashing around the drain outlets 43L, 43R.

[0094] Moreover, a guide plate 50 is further installed outside the drainage outlets 43L, 43R. Therefore, the water coming out of the drainage outlets 43L, 43R is prevented from splashing outward by the guide plate 50. As a result, the water mainly flows down along the support 31R as shown by the arrow Y3 in Fig. 3. The guide plate 50 guides the dripping water that has flowed down the support 31L, 31R.

[0095] In this way, with a work machine equipped with a canopy to which the disclosed technology is applied, water can be smoothly drained from the roof, making it easier to work even when working during rainfall and preventing the operator from getting wet. In addition, since water does not accumulate on the roof, the operator can be prevented from getting wet, for example, even when work is resumed after the rain.

[0096] <Application Examples> Not only rainwater but also various foreign objects fall onto the roof shingles 10. Therefore, if the drainage openings 43L, 43R are blocked by such foreign objects, the above-mentioned drainage performance is impaired. Therefore, depending on the site, it may be necessary to clean the gutter portion 20 frequently, which is troublesome. Therefore, in order to prevent such foreign objects from entering, a foreign object cover may be installed above the gutter portion 20.

[0097] Such a cover is shown in Figure 8. Cover 60A shown in Figure 8(a) is made of a steel plate that is slightly larger than the receiving opening of gutter section 20. Cover 60A is attached to roof panel 10 with bolts or the like, leaving a gap above the receiving opening of gutter section 20.

[0098] The cover 60B shown in FIG. 8(b) is made of a fence-like member that is approximately the same size as the receiving opening of the gutter section 20. The cover 60B has multiple slits, and is attached to the roof panel 10 with bolts or the like while covering the receiving opening of the gutter section 20. The cover 60B may be made of a net-like or lattice-like member. It is preferable that the maximum width of each opening of the cover 60B is smaller than the drain openings 43L, 43R. This makes it possible to effectively prevent clogging of the drain openings 43L, 43R.

[0099] The canopy for a work machine according to the disclosed technology is not limited to the above-described embodiment, and includes various other configurations.

[0100] For example, in the embodiment, a canopy in which supports extend downward from the four corners of the roof plate has been exemplified, but the present invention is not limited to this. As long as the canopy has supports extending downward from at least two points on each of the left and right sides of the roof plate, the disclosed technology can be applied.

[0101] The shape of the roof panel (as viewed from above) is preferably substantially rectangular, but is not limited thereto. For example, the disclosed technology can be applied to roof panels having curved edges such as circles or ellipses, or polygonal edges.

[0102] The gutter location is not limited to the front of the roof panel. For example, the downwardly sloping surface may be inclined toward either the left or right, and the gutter may be located on the side of the roof panel. However, since there is an access hatch on the left side of the roof panel, there is a risk that water in the gutter may get into the driving space. Since there is a side machinery room on the right side of the roof panel, there is a risk that water in the gutter may get into the side machinery room.

[0103] In this regard, if the downwardly inclined surface portion is inclined toward the rear and the gutter portion is located at the rear of the roof panel, such a risk can be avoided. In this case, it is particularly preferable to locate the end portion constituting the lowest portion of the gutter portion on the rear side of the entrance / exit.

[0104] If the drain is behind the entrance, even if water drips, it is unlikely to interfere with the operator's work. In addition, the water in the gutter is unlikely to get into the driving space or engine room. Furthermore, any foreign objects that get into the gutter will collect at the bottom of the gutter near the entrance, making cleaning easy.

[0105] The cross-sectional shape of the gutter is not limited to an inverted triangle. For example, it may be an arc or a polygon. The work machine is not limited to a hydraulic excavator. Any machine equipped with a canopy may be used. The machine body does not necessarily need to have a rotating function. [Explanation of symbols]

[0106] 1. Hydraulic excavator (working machine) 2 Undercarriage 3 Upper rotating body (machine body) 4 Attachment 7 Driving space 8 Entrance 9. Canopy 9a Roof 10. Roof Shingles 11 Rear eaves 12 Downward slope section 13 Upward slope 20 Hibe 30 frames 31L, 31R pillar 31a Front support section 31b Front bend 31c Beam section 31d Back bend 31e Rear strut part 40 Dam plate (vertical plate) 43L,43R Drain port 50 Guidance board (second vertical board) θ1 Tilt angle θ2 Tilt angle

Claims

1. A canopy for a work machine in which a machine body performing work is mounted on a lower traveling body, A roof plate covering an upper portion of an operating space provided in the machine body; At least two columns supporting the roof panel while the operating space is open; Equipped with The roof shingle is A downwardly inclined surface portion that is inclined downward toward a predetermined direction; a groove-shaped gutter portion extending along an edge of a lower end portion of the downwardly inclined surface portion; having The gutter portion is inclined downward from one end to the other end, At least the other end of the gutter is connected to an upper portion of the vertically extending portion of the support, and water that is received on the roof panel and flows down into the gutter is caused to flow down along the support, A vertical plate is provided at a connection portion between the end of the gutter portion and the support pillar, the vertical plate extending along an upper portion of the support pillar and closing the end of the gutter portion, A canopy for a work machine, the canopy having a drainage hole formed in the lower edge of the vertical plate.

2. 2. The canopy for a work machine according to claim 1, A canopy for a work machine, the other end of which is disposed on the opposite side of an access door for getting on and off the driving space.

3. 2. The canopy for a work machine according to claim 1, A canopy for a work machine, the other end of which is disposed behind an entrance for getting on and off the driving space.

4. 2. The canopy for a work machine according to claim 1, A canopy for a work machine, comprising: a second vertical plate extending along an upper portion of the pillar, separated from the outer surface of the vertical plate by a gap, at the connection portion between the end of the gutter portion and the pillar.

5. The canopy for a work machine according to any one of claims 1 to 4, A canopy for a work machine, wherein the cross-sectional shape of the gutter portion is an inverted triangle.

6. A canopy for a work machine according to claim 5, The vertical plate having a first opening and a second opening at at least two locations on a lower edge is provided on both ends of the gutter portion, A canopy for a work machine, wherein the first opening forms the drain outlet at one end of the gutter portion, and the second opening forms the drain outlet at the other end of the gutter portion.

7. The canopy for a work machine according to any one of claims 1 to 6, A canopy for a work machine, wherein the downwardly inclined surface portion and the gutter portion are formed by bending a single plate material.

8. The canopy for a work machine according to any one of claims 1 to 7, A canopy for a work machine, wherein the angle of inclination of the gutter portion is set to be larger than the angle of inclination of the downwardly inclined surface portion.

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