JP2015229904A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction machine capable of draining rainwater, entering from a rear window of a cab, to a desired direction with simple constitution.SOLUTION: A cab 8 has a living space for operator formed by encircling a front face part 11, a rear face part 12, a left side face part, a right side face part 14, and a top part 15 with panels respectively. A driver's seat where the operator sits is provided in the cab 8, and a rear tray 22 is provided between the back rest of the driver's seat and the rear face part 12 of the cab 8. A rear window 12E of the rear face part 12 of the cab 8 is formed to open and close so as to circulate air in the cab 8. A reinforcement bracket 12D of the rear face part 12 of the cab 8 is provided with a rainwater guide member 23 which makes rainwater, entering a gap between the rear face part 12 of the cab 8 and the rear tray 22 with the rear window 12E opened, to outside the living space along the rear face part 12, flow down toward the left side face part of the cab 8 and drain the rainwater.

Description

  The present invention relates to a construction machine such as a hydraulic excavator, a wheel loader, or a hydraulic crane.

  In general, a hydraulic excavator, which is a typical example of a construction machine, includes, for example, a self-propelled lower traveling body, an upper revolving body that is turnable on the lower traveling body, and an upright swinging forward of the upper revolving body. It is comprised by the working apparatus attached so that it was possible.

  The upper swivel body includes a swivel frame that is a support structure member and has a work device attached thereto, and a cab that is mounted on the swivel frame and has a front surface portion, a rear surface portion, a left side surface portion, a right side surface portion, and a top surface portion surrounded by panels And a driver's seat provided in the cab and seated by an operator. The hydraulic excavator uses many electric devices, various sensors, and switches, and various electric components including a controller for controlling these are provided in the cab. Such an electrical component is disposed, for example, on the rear side of the driver's seat (see, for example, Patent Document 1).

JP 2000-170209 A

  By the way, in order to obtain a wide field of view, the hydraulic excavator is provided with windows on the front, rear, left and right sides of the cab. Among these windows, the rear window provided on the rear surface portion can be opened and closed so that the outside air can be circulated in the cab. In this case, outside air can be taken into the cab through the rear window by opening the rear window. However, when the rear window is opened, for example, when it starts to rain or water is accidentally applied, rainwater may enter the cab from the opened rear window.

  Here, the configuration described in Patent Document 1 covers electrical components such as a controller disposed on the rear side of the cab with a rear tray (rear cover), and on the inner wall of the cab, over the rear surface portion, the left side surface portion, and the right side surface portion, A bowl-shaped member is provided along the lower edge of the rear tray. In the case of such a configuration, a long bowl-shaped member bent in a complicated manner is required, and the cost of the bowl-shaped member may increase. In addition, the hook-shaped member provided on the inner wall of the cab may interfere with the assembling work and the repair work for the electric parts arranged in the rear tray.

  Moreover, in the configuration described in Patent Document 1, since the drainage destination of the bowl-shaped member is the floor surface of the cab, the floor surface of the cab may be submerged, and the floor surface and the like may be soiled. Furthermore, since the hook-shaped member can be seen from the lower end edge of the rear tray, there is a possibility that the aesthetic appearance in the cab may be impaired.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a construction machine capable of draining rainwater entering from a rear window of a cab in a desired direction with a simple configuration. It is in.

  The construction machine according to the present invention includes a frame having a working structure attached to the front side in the front and rear directions, and a front surface portion, a rear surface portion, a left side surface portion, a right side surface portion, and a top surface portion mounted on the frame. An operator's living space is formed by surrounding with a panel, a cab having a rear window on the rear surface portion, a driver seat provided in the cab and seated by the operator, a backrest of the driver seat and the rear of the cab And a rear tray provided between the surface portion.

  In order to solve the above-described problem, the feature of the configuration adopted by the invention of claim 1 is that the rear window of the cab is formed to be openable and closable so as to allow air to flow in the cab, and the rear surface portion of the cab. The rainwater that has entered the gap between the rear surface portion and the rear tray with the rear window opened is allowed to flow down toward one or both sides of the left and right sides of the rear surface portion along the rear surface portion. A rainwater guide member for discharging outside the living space is provided.

  The rear surface portion of the cab includes a left rear pillar, a right rear pillar, a ceiling pillar, a reinforcing bracket for reinforcing a space between the left rear pillar and the right rear pillar, the left rear pillar and the right rear pillar. And the rear window provided surrounded by the ceiling pillar and the reinforcing bracket, and a rear panel that covers a lower part than the rear window between the left rear pillar and the right rear pillar, and the rainwater guide The member is formed as a hook-like body attached to the reinforcing bracket or the rear panel and inclined downward toward the left side surface portion and / or the right side surface portion of the cab.

  According to a third aspect of the present invention, the left side surface portion and / or the right side surface portion of the cab has an outer panel that forms an outer shape of the cab, and a through hole at a position corresponding to the lower end side of the rainwater guide member that is disposed inside the outer panel. The rainwater flowing through the rainwater guide member flows between the outer panel and the inner panel through the through hole, and is discharged from the lower side of the outer panel and the inner panel to the outside of the cab. It is in having been configured.

  According to a fourth aspect of the present invention, the rear window of the cab includes a left window and a right window, of which the right window is fixed and the left window is opened and closed, and the left side surface portion of the cab has an outer shape of the cab. An outer panel formed with an outer window opening, an inner panel disposed inside the outer panel and provided with an inner window opening at a position corresponding to the outer window opening, an inner window opening of the inner panel, and the outer panel A side window supported through a window frame member between the outer window opening and the rear surface portion of the cab located on the left side of the inner surface of the rear surface portion of the cab and the rear tray. A concealing plate that closes the gap is attached, and the concealing plate is configured to flow into the cab with the rear window open and to allow rainwater received by the concealing plate to flow down toward the window frame member.

  According to a fifth aspect of the present invention, the window frame member is provided with an opening that communicates between the outer panel and the inner panel, and rainwater that has flowed from the concealing plate to the window frame member passes through the opening to the outside of the cab. It is in the structure which is discharged.

  According to the first aspect of the present invention, when rainwater enters the gap between the rear surface portion of the cab and the rear tray when the rear window of the cab that can be opened and closed is opened, the rainwater flows in the left and right directions of the rear surface portion of the cab. The water is drained out of the living space along the rear surface portion through a rainwater guide member that flows down toward one side or both sides. For this reason, rain water entering from the rear window of the cab can be drained in a desired direction with a simple configuration in which the rain water guide member is provided on the rear surface portion of the cab.

  Thereby, for example, it is possible to protect the electrical components arranged on the rear side of the driver's seat from rainwater. In this case, since the rainwater guide member is provided along the rear surface portion of the cab in order to allow rainwater to flow toward one or both sides of the left and right direction of the rear surface portion of the cab, It is also possible to suppress the hindrance to the assembly work and repair work of the rear electrical parts.

  And since rainwater is drained out of a living space along the rear surface part of a cab through a rainwater guide member, it can also suppress that the floor surface of a cab becomes dirty with rainwater. Further, a rainwater guide member is disposed in the rear tray in order to flow rainwater that has entered the gap between the rear surface portion of the cab and the rear tray (the rainwater guide member is hidden by the rear tray), thereby ensuring the aesthetics in the cab. (Do not affect the aesthetics).

  According to the second aspect of the present invention, rainwater can be reliably drained in a desired direction by the rainwater guide member attached to the reinforcing bracket or rear panel of the cab and formed as a bowl-shaped body.

  According to the invention of claim 3, the rainwater flowing down through the rainwater guide member flows between the outer panel and the inner panel outside the living space through the through hole of the inner panel, and the outside of the cab from the lower side of the outer panel and the inner panel. To be discharged. For this reason, rainwater entering from the rear window of the cab can be drained to the outside of the cab without passing through the floor surface through the rainwater guide member. Thereby, it can suppress reliably that the floor surface of a cab becomes dirty with rain water.

  According to the fourth aspect of the present invention, rainwater entering from the rear window of the cab can be reliably drained through the two paths of the drainage path that flows down the concealment plate and the drainage path that flows down the rainwater guide member.

  According to the fifth aspect of the present invention, rainwater flowing down from the concealing plate to the window frame member can be reliably discharged to the outside of the cab through the opening provided in the window frame member.

1 is a front view showing a hydraulic excavator according to a first embodiment. It is the perspective view which expanded the cab in FIG. 1 and was seen from the left front side. It is the cross-sectional perspective view which looked at the cab which abbreviate | omitted the driver's seat etc. from the arrow III-III direction in FIG. It is the perspective view which looked at the rear window of a cab, a rear tray, etc. from the arrow (IV) direction in FIG. FIG. 5 is a perspective view of the same position as in FIG. 4 with the rear tray removed and showing a reinforcing bracket, a rainwater guide member, and the like. It is the disassembled perspective view which looked at the cab from the left front side. It is a perspective view which expands and shows the (VII) part in FIG. It is the perspective view which looked at the rear surface part and left side part of the cab from the right front side of the cab. It is sectional drawing which looked at the rear surface part of the cab, the reinforcement bracket, the rainwater guide member, the rear tray, etc. from the arrow IX-IX direction in FIG. It is sectional drawing which looked at the rear surface part, left side surface part, rear tray, etc. of the cab from the arrow XX direction in FIG. It is a perspective view of the same position as Drawing 4 showing the rear window of a cab, a rear tray, a concealment board, etc. by a 2nd embodiment. It is a perspective view of the same position as FIG. 11 which removes a rear tray and shows a concealment board, a reinforcement bracket, a rainwater guide member, etc. It is the perspective view which looked at the rear surface part and left side part of the cab from the right front side of the cab. It is sectional drawing of the same position as FIG. 9 which shows the rear surface part of the cab by a modification, a reinforcement bracket, a rainwater guide member, a rear tray, etc.

  Hereinafter, an embodiment of a construction machine according to the present invention will be described in detail with reference to the accompanying drawings, taking as an example a case where the construction machine is applied to a hydraulic excavator.

  1 to 10 show a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a hydraulic excavator as a typical example of a construction machine used for earth and sand excavation work. The hydraulic excavator 1 includes a self-propelled crawler-type lower traveling body 2, an upper revolving body 3 that is turnably provided on the lower traveling body 2 and that forms a vehicle body (main body) together with the lower traveling body 2, It is comprised by the working apparatus 4 attached to the front side of this upper revolving body 3 and the front side of the back direction so that a raising / lowering motion was possible.

  The upper swing body 3 includes a swing frame 5 as a frame in which the working device 4 is mounted on the front side in the front and rear directions, and a cab 8 described later mounted on the left front side of the swing frame 5. A building cover 6 positioned behind the cab 8 and covering an engine, a hydraulic pump, a control valve, etc. (all not shown) mounted on the revolving frame 5, and a counterweight attached to the rear part of the revolving frame 5 7.

  Here, the configuration of the cab 8 which is a main part of the first embodiment will be described.

  Reference numeral 8 denotes a cab mounted on the left front side of the revolving frame 5. In the cab 8, there is a living space where an operator can board and perform various operations. As shown in FIGS. 2 and 3, the cab 8 includes a floor member 9 and a cab box 10 which will be described later, and is attached to the revolving frame 5.

  Reference numeral 9 denotes a floor member that constitutes the floor surface of the cab 8, and the floor member 9 is formed, for example, as a rectangular plate that is long in the front and rear directions. A plurality of locations including the four corners of the floor member 9 are supported by the revolving frame 5 via vibration-proof mounts (not shown). On the other hand, a driver's seat 16 described later is provided at a substantially central position of the floor member 9.

  Reference numeral 10 denotes a cab box that forms the cab 8 together with the floor member 9. The cab box 10 forms (defines) a living space on the floor member 9. That is, the cab box 10 is formed in a box shape by surrounding the front surface portion 11, the rear surface portion 12, the left side surface portion 13, the right side surface portion 14, and the top surface portion 15 with a panel, and a panel (an inner panel forming an inner wall surface). The interior surrounded by is an operator's living space. Lower portions of the front surface portion 11, the rear surface portion 12, the left side surface portion 13, and the right side surface portion 14 that are peripheral surfaces of the cab box 10 are attached around the floor member 9. The cab box 10 (cab 8) includes a rear window 12E on the rear surface portion 12.

  The front portion 11 has an upper front window 11A and a lower front window 11B, each of which is a glass panel (glass plate) in order to give a wide forward field of view to the operator, and the left and right directions of the upper front window 11A and the lower front window 11B. The front left pillar 11C and the right front pillar 11D are arranged on both sides and extend upward and downward. Here, for example, the upper front window 11 </ b> A can be stored below the top surface portion 15 by moving upward toward the top surface portion 15. On the other hand, the lower front window 11 </ b> B can be removed from the front surface portion 11. Thereby, the front surface part 11 can be opened largely by storing the upper front window 11A and removing the lower front window 11B.

  The rear surface portion 12 is disposed at the left rear corner portion of the cab 8 (cab box 10) and extends upward and downward to the left rear pillar 12A, and is disposed at the right rear corner portion of the cab 8 (cab box 10) and upward and downward. Are provided between the upper end side of the right rear pillar 12B and the left rear pillar 12A and the upper end side of the right rear pillar 12B, and are connected in the left and right directions (rear). The ceiling pillar 12C and the ceiling pillar 12C Reinforcing bracket 12D that reinforces the space between the left rear pillar 12A and the right rear pillar 12B on the lower side, and a rear window that is surrounded by the left rear pillar 12A, the right rear pillar 12B, the ceiling pillar 12C, and the reinforcing bracket 12D 12E and a rear panel 12F that covers a lower part than the rear window 12E between the left rear pillar 12A and the right rear pillar 12B.

  Here, the rear window 12 </ b> E is formed so as to be openable and closable in order to allow air to flow in the cab 8. That is, the rear window 12E is disposed so as to overlap the window frame 12E1 in the front and rear directions, and is configured by a left window 12E2 and a right window 12E3, each serving as a glass panel (glass plate). Of these left window 12E2 and right window 12E3, for example, right window 12E3 is fixed. On the other hand, the left window 12E2 can be opened and closed by moving left and right along the window frame 12E1. Therefore, the rear window 12E can be opened by moving the left window 12E2 to the right side and can be closed by moving the left window 12E2 to the left side.

  For example, as shown in FIGS. 8 and 9, the reinforcing bracket 12 </ b> D has a plate body such as a steel plate that is long in the left and right directions and has a substantially U-shaped cross section (substantially “U” shape, substantially “H” character) It is formed by bending into a shape. That is, the reinforcing bracket 12D serves as a reinforcing member (horizontal beam) that reinforces the space between the left rear pillar 12A and the right rear pillar 12B. For example, as shown in FIGS. The front surface portion 12D1 facing the (center tray portion 22A), the upper surface portion 12D2 bent from the upper end of the front surface portion 12D1 to the rear side, and bent upward from the rear end of the upper surface portion 12D2 and fixed to the rear panel 12F. An upper flange portion 12D3, a lower surface portion 12D4 bent from the lower end of the front surface portion 12D1, and a lower flange portion 12D5 bent downward from the rear end of the lower surface portion 12D4 and fixed to the rear panel 12F. It is comprised including. A rainwater guide member 23 described later is attached to the front surface portion 12D1 of the reinforcing bracket 12D.

  The left side surface portion 13 has a left window 13A that is closer to the rear side from the middle portion in the front and rear directions, and the front side from the middle portion is an entrance / exit 13B for an operator to get on and off the cab 8. A door 13C for opening and closing the entrance 13B is rotatably attached to the left side surface portion 13. For this purpose, as shown in FIG. 6, the left side surface portion 13 forms an outer shape of the cab 8 (cab box 10) and is provided with an outer window opening 13D1 (left) and an inner panel 13D disposed inside the outer panel 13D. A window frame member between the inner panel opening 13E1 provided with an inner window opening 13E1 at a position corresponding to the outer window opening 13D1 (left), and the inner window opening 13E1 of the inner panel 13E and the outer window opening 13D1 of the outer panel 13D. And a left window 13A as a side window supported via 13F.

  The inner panel 13E and the outer panel 13D are formed as a hollow panel having a function as a center pillar by abutting each other and being fixed by welding means. The window frame member 13F is attached to the inner window opening 13E1 of the inner panel 13E and closes the space between the outer panel 13D and the inner panel 13E along the peripheral edge of the left window 13A serving as a glass panel (glass plate).

  As shown in FIGS. 6, 7, and 10, the inner panel 13 </ b> E serving as the inner wall of the cab box 10 (defining the living space) has a through hole at a position corresponding to the lower end side of a rainwater guide member 23 described later. 13E2 is provided. As a result, as shown by arrows in FIGS. 7 and 10, rainwater flowing down through the rainwater guide member 23 flows between the outer panel 13D and the inner panel 13E that are outside the living space through the through hole 13E2 of the inner panel 13E. That is, rainwater that enters the cab 8 from the opened rear window 12E and enters the gap between the rear surface portion 12 of the cab 8 and a rear tray 22 (the rear end edge of the upper cover portion 22D), which will be described later, It flows through 12D to the rainwater guide member 23, and flows down through the rainwater guide member 23. Then, the rainwater flowing down through the rainwater guide member 23 flows between the outer panel 13D and the inner panel 13E through the through hole 13E2 of the inner panel 13E while being along the rear surface portion 12, and is transmitted along the inner panel 13E to reach the outer panel 13D and the inner panel 13E. It is discharged to the outside of the cab 8 from the lower side of the panel 13E.

  The right side surface portion 14 is provided with a right window 14A serving as a glass panel (glass plate) in a wide range from the upper and lower middle portions to the upper side. That is, the right side surface portion 14 is larger than the right window 14A between the right window 14A in which the front upper and lower dimensions are larger than the rear upper and lower dimensions, and the right front pillar 11D and the right rear pillar 12B. It is comprised by the right panel 14B which covers a lower part.

  The top surface portion 15 is provided between the upper end side of the left front pillar 11C and the upper end side of the left rear pillar 12A, and connects the front and rear directions between the left ceiling pillar 15A and the upper end side and right rear of the right front pillar 11D. The right ceiling pillar 15B, which is provided between the upper end side of the pillar 12B and is connected in the forward and rearward direction, the front end side of the left ceiling pillar 15A (or the upper end side of the left front pillar 11C) and the front end of the right ceiling pillar 15B. Between the front ceiling pillar 15C (see FIG. 6) and the left ceiling pillar 15A and the right ceiling pillar 15B. The ceiling panel 15D to cover and the skylight 15E used as the glass panel (glass plate) for seeing the operation | work in the state which raised the working apparatus 4 are comprised roughly.

  Reference numeral 16 (see FIG. 2) denotes a driver seat provided in the cab 8, and the driver seat 16 is seated by an operator. As shown in FIG. 2, left and right work levers 17 for operating the work device 4 and the like are provided on both the left and right sides of the driver's seat 16. On the other hand, as shown in FIGS. 2 and 3, left and right traveling levers / pedals 18 for traveling the lower traveling body 2 are provided at the front side position of the floor member 9 which is the front side of the driver's seat 16. Yes. A rear tray 22 described later is provided between the back 16 </ b> A of the driver seat 16 and the rear surface portion 12 of the cab 8.

  Reference numeral 19 denotes an indoor unit storage box provided at the rear position of the floor member 9 on the rear side of the driver's seat 16. Inside the indoor unit accommodation box 19, an indoor unit 20 of an air conditioner described later is accommodated. On the upper surface of the indoor unit storage box 19, an electrical component 21 to be described later is placed.

  Reference numeral 20 denotes an indoor unit of an air conditioner housed in the indoor unit housing box 19. The indoor unit 20 adjusts the inside of the cab 8 to a temperature environment desired by the operator by blowing cold air or hot air adjusted to a desired temperature into the living space in the cab 8 as conditioned air. The indoor unit 20 has a blower fan, an evaporator, a heater core, and a blower direction switching plate (all not shown) in a housing 20A formed in a box shape, and is an outdoor unit composed of a condenser, a compressor, and the like provided on the engine side. Connected to a machine (not shown).

  The indoor unit 20 has, for example, an internal airflow inlet 20B and an external airflow inlet (not shown). The indoor unit 20 adjusts the air sucked from these inflow ports 20B to desired conditioned air, and the conditioned air enters the cab 8 from an outlet 22D1 of the rear tray 22 described later through an air conditioning duct (not shown). Supply.

  Reference numeral 21 denotes an electrical component (electrical component) provided in the cab 8, specifically, between the back 16 A of the driver's seat 16 and the rear surface portion 12 of the cab 8. The electrical component 21 is placed on the upper surface of the indoor unit storage box 19 and covered with a rear tray 22 described later. Typical examples of the electrical component 21 include electrical equipment mounted on the hydraulic excavator 1, various sensors, a controller (control device) for controlling switches, and information (operation time, maintenance) of the hydraulic excavator 1 using a network. Communication terminal for transmitting information, position information, etc., and a harness for connecting them. Since the electrical component 21 is formed of many electronic components, it is necessary to avoid contact (wetting) with rainwater.

  A rear tray 22 is provided between the back 16 A of the driver's seat 16 and the rear surface portion 12 of the cab 8 and provided in the cab 8. As shown in FIGS. 3, 4, and 9, the rear tray 22 is formed using, for example, a resin material, and includes a center tray portion 22 </ b> A, a left tray portion 22 </ b> B, a right tray portion 22 </ b> C, and an upper cover portion. 22D. The center tray portion 22A includes a top plate 22A1 having a flat surface shape, a front plate 22A2 that rises downward from the front end of the top plate 22A1, and a rear plate 22A3 that rises upward from the rear end of the top plate 22A1. It consists of

  The left tray portion 22B is disposed on the left side of the center tray portion 22A and is formed in a substantially convex curved shape so as to rise from the front side toward the rear side. The right tray portion 22C is disposed on the right side of the center tray portion 22A, and is formed in a substantially convex curved shape so as to rise from the front side toward the rear side. The upper cover portion 22D is provided along the upper end edge of the rear plate 22A3 of the center tray portion 22A, and connects the upper end sides of the left and right tray portions 22B and 22C. The upper cover portion 22D is provided with an outlet 22D1 through which conditioned air from the indoor unit 20 flows out (opens).

  Here, the rear tray 22 is detachably attached to the rear side of the driver's seat 16 in the cab box 10 via a bracket or the like (not shown). The rear tray 22 covers the electrical component 21 from the upper side in a state where it is mounted in the cab box 10. That is, the rear tray 22 has a role of a decorative plate in the rear portion of the driver's seat 16 in the cab box 10 and improves the aesthetics in the cab 8 by covering the electrical components 21 and the like from the upper side. is there. In addition to this, the rear tray 22 also has a function of protecting the electrical component 21 from dust, rainwater and the like that have entered the cab 8.

  Next, the rainwater guide member 23 provided on the rear surface portion 12 of the cab 8 will be described.

  That is, 23 is a rainwater guide member provided on the reinforcing bracket 12 </ b> D constituting the rear surface portion 12 of the cab 8. The rainwater guide member 23 allows the rainwater that has entered the gap between the rear surface portion 12 of the cab 8 and the rear tray 22 to open to the left and right sides along the rear surface portion 12 of the cab 8 with the rear window 12E opened. It flows down and is discharged out of the living space of the operator. Specifically, the rainwater guide member 23 flows down along the rear surface portion 12 toward the left side, that is, the left side surface portion 13 of the cab 8 that is the side where the rear window 12E opens. For this reason, the rainwater guide member 23 is attached to the reinforcing bracket 12D in a state where the left side is inclined so as to be lower than the right side. The length of the rainwater guide member 23 in the left and right directions is the length in the left and right directions of the opening at least when the rear window 12E is most opened (when the left window 12E2 is moved to the rightmost side). It is larger than the dimensions. Accordingly, the rainwater guide member 23 is arranged over the entire left and right directions of the opening of the rear window 12E.

  Here, the rainwater guide member 23 is formed as a bowl-like body that is inclined downward toward the left side surface portion 13 of the cab 8. Specifically, the rainwater guide member 23 is formed by bending a long plate material into an L shape, and includes a bottom plate portion 23A, a front rising portion 23B, and a lateral rising portion 23C (see FIG. 5). Have. For example, the rainwater guide member 23 has a rear end edge of the bottom plate portion 23A attached to the front surface portion 12D1 of the reinforcing bracket 12D using means such as welding.

  The lower end side (left end side) of the rainwater guide member 23 is inserted into the through hole 13E2 of the inner panel 13E that constitutes the left side surface portion 13 of the cab 8. In this case, as shown in FIG. 10, the lower end of the rainwater guide member 23 is projected to the outer panel 13D side from the inner panel 13E. That is, the lower end of the rainwater guide member 23 is positioned between the inner panel 13E and the outer panel 13D.

  As shown by the arrows in FIGS. 7 to 10, the cab 8 enters the cab 8 through the rear window 12E in the open state, and enters the gap between the rear surface portion 12 of the cab 8 and the rear end edge of the upper cover portion 22D of the rear tray 22. The rainwater flows through the reinforcing bracket 12D to the rainwater guide member 23, and flows down through the rainwater guide member 23. And the rainwater which flowed down along the rear surface part 12 through the rainwater guide member 23 flows between the inner panel 13E and the outer panel 13D which are outside the living space through the through hole 13E2 of the inner panel 13E, and is transmitted along the inner panel 13E. It is discharged to the outside of the cab 8 from below the inner panel 13E and the outer panel 13D.

  Accordingly, the rainwater entering through the rear window 12E of the cab 8 is simply configured to provide the rainwater guide member 23 on the reinforcing bracket 12D. It is possible to drain to the outside of the cab 8 through the gap. In this case, since the rainwater guide member 23 is provided along the rear surface portion 12 of the cab 8 (extending in the left and right directions), the rainwater guide member 23 is assembled to the electrical component 21 on the rear side of the driver's seat 16. It is possible to suppress obstruction of work and repair work.

  Moreover, since rainwater is drained out of the living space along the rear surface portion 12 of the cab 8 through the rainwater guide member 23, the floor surface (floor member 9) of the cab 8 can be prevented from being contaminated by rainwater. Further, the rainwater guide member 23 is hidden by the rear tray 22 because it is located in the cab 8 on the rear side of the rear tray 22 (on the rear side of the center tray portion 22A and below the upper cover portion 22D). For this reason, the rainwater guide member 23 is difficult to be visually recognized by the operator, and the aesthetic appearance in the cab 8 can be ensured.

  The hydraulic excavator 1 according to the first embodiment has the above-described configuration. Next, the operation thereof will be described.

  First, an operator can board the cab 8 and operate the left and right traveling levers / pedals 18 to move the lower traveling unit 2 forward or backward. On the other hand, the operator in the cab 8 operates the left and right working levers 17 to move the working device 4 up and down to perform soil excavation work and the like.

  During such work, for example, in order to ventilate the cab 8, the rear window 12E of the rear surface part 12 may be opened for work. As described above, when rain is suddenly started while the rear window 12E is opened, rainwater may flow into the cab 8 from the opened rear window 12E. Further, when the hydraulic excavator 1 is washed, water may flow into the cab 8 from the opened rear window 12E even if water is accidentally poured while the rear window 12E is opened.

  At this time, rainwater that has entered the cab 8 from the rear window 12E enters the gap between the rear surface portion 12 of the cab 8 and the rear end edge of the upper cover portion 22D of the rear tray 22, and travels along the rear surface portion 12 of the cab 8. If it flows downward, there is a risk that the electrical component 21 located under the rear window 12E and placed on the upper surface of the indoor unit storage box 19 will get wet (soaked in water).

  On the other hand, according to the first embodiment, rain water that has entered the rear surface portion 12 of the cab 8 into the gap between the rear surface portion 12 and the rear tray 22 (the rear end edge of the upper cover portion 22D), A rainwater guide member 23 is provided that flows down toward the left side surface portion 13 of the cab 8 along the rear surface portion 12 and discharges it outside the living space. Therefore, even when rainwater enters the gap between the rear surface portion 12 of the cab 8 and the rear tray 22 (the rear end edge of the upper cover portion 22D) when the rear window 12E of the cab 8 that can be opened and closed is opened, The rainwater is drained out of the living space through the rainwater guide member 23. Accordingly, rainwater entering from the rear window 12E of the cab 8 can be drained in a desired direction with a simple configuration in which the rainwater guide member 23 is provided on the rear surface portion 12 of the cab 8, and the rear side of the driver's seat 16 can be drained. The arranged electrical component 21 can be protected from rainwater.

  In this case, the rainwater guide member 23 is formed as a bowl-like body, and is attached to the reinforcing bracket 12 </ b> D of the rear surface portion 12 of the cab 8. For this reason, rainwater can be reliably drained to the left side surface portion 13 side of the cab 8 through the rainwater guide member 23. In addition, since the rainwater guide member 23 is provided along the rear surface portion 12 of the cab 8, the rainwater guide member 23 interferes with the assembly work and the repair work of the electrical component 21 on the rear side of the driver's seat 16. Can be suppressed. Moreover, since the rainwater guide member 23 is hidden by the rear tray 22 in a state where the rear tray 22 is attached in the cab 8, it is possible to ensure the aesthetics in the cab 8.

  Further, the inner panel 13 </ b> E constituting the left side surface portion 13 of the cab 8 is provided with a through hole 13 </ b> E <b> 2 at a position corresponding to the lower end side of the rainwater guide member 23. For this reason, rainwater flowing down through the rainwater guide member 23 flows between the outer panel 13D and the inner panel 13E outside the living space through the through hole 13E2 of the inner panel 13E, and the cab 8 is formed from below the outer panel 13D and the inner panel 13E. Is discharged outside. Accordingly, rainwater entering from the rear window 12E of the cab 8 can be drained to the outside of the cab 8 through the rainwater guide member 23 without passing through the floor surface (floor member 9). As a result, it is possible to reliably suppress the floor surface (floor member 9) of the cab 8 from being contaminated by rainwater.

  Next, FIGS. 11 to 13 show a second embodiment of the present invention. A feature of the second embodiment resides in that a concealing plate that closes the rear tray is attached to the rear surface portion of the cab. In the second embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  11 to 13, reference numeral 31 denotes a window frame member that supports the left window 13 </ b> A by the left side surface portion 13 of the cab 8. The window frame member 31 constitutes the left side surface portion 13 of the cab 8 together with the left window 13A, the outer panel 13D, the inner panel 13E, and the like. The window frame member 31 is attached to the inner window opening 13E1 of the inner panel 13E and closes the space between the outer panel 13D and the inner panel 13E along the peripheral edge of the left window 13A.

  As shown in FIG. 13, the window frame member 31 is provided with an opening 31A such as a notch or a notch communicating between the outer panel 13D and the inner panel 13E. Thereby, rainwater that has flowed down from the concealment plate 32 described later to the window frame member 31 flows between the outer panel 13D and the inner panel 13E outside the living space through the opening 31A, and from below the outer panel 13D and the inner panel 13E. It is configured to be discharged to the outside of the cab 8.

  Reference numeral 32 denotes a concealing plate that is attached to the rear surface portion 12 of the cab 8, specifically, the upper surface portion 12D2 of the reinforcing bracket 12D using bolts 33. The concealing plate 32 is located on the left side of the rear surface portion 12 of the cab 8 and closes the space between the inner surface of the rear surface portion 12 of the cab 8 and the rear tray 22. More specifically, the concealment plate 32 is surrounded by the inner surface of the rear surface portion 12, the inner surface of the left surface portion 13, the rear edge of the left tray portion 22B of the rear tray 22, and the left edge of the upper cover portion 22D. The substantially rectangular or ¼ arc-shaped (left) opening 34 formed in this manner is closed at a position below the upper cover portion 22D of the rear tray 22. The concealing plate 32 is attached to be inclined such that the front end side is lower than the rear end side.

  The concealing plate 32 is provided with a protruding portion 32 </ b> A that is located on the lower left side (the left front end side) and protrudes toward the window frame member 31 side of the left side surface portion 13 of the cab 8. At the same time, on the lower end side of the concealment plate 32, a rainwater guide portion 32B that rises upward along the lower end edge is provided. Thereby, the concealment plate 32 is configured to flow into the cab 8 with the rear window 12E open and to allow rainwater received by the concealment plate 32 to flow toward the window frame member 31. The rainwater flowing down to the window frame member 31 is discharged to the outside of the cab 8 through the opening 31A of the window frame member 31.

  Reference numeral 35 denotes a closing plate that is located on the right side of the rear surface portion 12 of the cab 8 and blocks between the inner surface of the rear surface portion 12 of the cab 8 and the rear tray 22. The closing plate 35 is formed to be surrounded by the inner surface of the rear surface portion 12, the inner surface of the right surface portion 14, the rear edge of the right tray portion 22C of the rear tray 22, and the right edge of the upper cover portion 22D. The rectangular or substantially 1/4 arc-shaped (right) opening 36 is closed at a position below the upper cover portion 22D of the rear tray 22.

  In the second embodiment, a part of rainwater that has entered the cab 8 is caused to flow down to the window frame member 31 by the concealment plate 32 as described above. The basic operation of the second embodiment is described above. There is no particular difference from the form.

  In particular, in the second embodiment, since the concealing plate 32 for closing the space between the rear tray 22 and the rear surface portion 12 of the cab 8 is attached, rainwater entering from the rear window 12E of the cab 8 flows down the concealing plate 32. Thus, the water can be reliably drained through the two routes of the drainage route and the drainage route flowing down the rainwater guide member 23. Moreover, since the window frame member 31 is provided with an opening 31A that communicates between the outer panel 13D and the inner panel 13E, rainwater that has flowed from the concealing plate 32 to the window frame member 31 extends outside the living space through the opening 31A. Therefore, it can be reliably discharged to the outside of the cab 8.

  In the first embodiment, the case where the rainwater guiding member 23 is provided (attached) to the reinforcing bracket 12D of the rear surface portion 12 of the cab 8 has been described as an example. However, the present invention is not limited to this, and for example, a rainwater guide member 23 may be provided (attached) to the rear panel 12F of the rear surface portion 12 of the cab 8 as in a modification shown in FIG. The same applies to the second embodiment.

  In the first embodiment, the case where the rainwater guide member 23 is configured to flow rainwater toward the left side surface portion 13 of the cab 8 has been described as an example. However, the present invention is not limited to this, and for example, the rainwater guide member may be inclined toward the right side surface portion of the cab so that the rainwater flows down toward the right side surface portion of the cab. Moreover, as a structure which makes rain water flow down toward both the right side part and left side part (left and right direction) of a cab by making the rain water guide member into the mountain shape which the center part becomes a top part, for example Also good. The same applies to the second embodiment and the modified example.

  In the first embodiment, as a method for opening and closing the rear window 12E, a sliding door system composed of two windows (glass panel and glass plate) of a left window 12E2 and a right window 12E3 that are arranged to overlap in the front and rear directions. The case where is adopted is described as an example. However, the present invention is not limited to this. For example, one of the left and right directions or one of the upper and lower directions of a single window (glass panel, glass plate) is rotatably attached, and this is the center of rotation. You may employ | adopt the system which opens and closes the other. The same applies to the second embodiment and the modified example.

  In each embodiment, the crawler type hydraulic excavator 1 is described as an example of the construction machine. However, the present invention is not limited to this, and may be applied to a wheel-type hydraulic excavator. Besides, it can be widely applied to various construction machines such as hydraulic cranes, wheel loaders and forklifts.

1 Excavator (construction machine)
4 Working device 5 Rotating frame (frame)
8 Cab 11 Front part 12 Rear part 12A Left rear pillar 12B Right rear pillar 12C Ceiling pillar 12D Reinforcement bracket 12E Rear window 12E2 Left window 12E3 Right window 12F Rear panel 13 Left side part 13D Outer panel 13D1 Outer window opening 13E Inner panel opening 13E1 Inner panel opening 13E1 Through hole 13F, 31 Window frame member 14 Right side surface portion 15 Top surface portion 16 Driver's seat 16A Backrest 22 Rear tray 23 Rainwater guide member 31A Opening 32 Concealing plate

Claims (5)

A frame with a work structure attached to the front side in the front and rear direction, and a support structure;
A cab that is mounted on the frame to form a living space for the operator by surrounding each of the front surface portion, the rear surface portion, the left side surface portion, the right side surface portion, and the top surface portion with a panel, and has a rear window on the rear surface portion;
A driver's seat provided in the cab and seated by an operator;
In a construction machine comprising a rear tray provided between a backrest of the driver's seat and a rear surface portion of the cab,
The rear window of the cab is formed so as to be openable and closable so as to circulate air in the cab,
On the rear surface portion of the cab, rainwater that has entered the gap between the rear surface portion and the rear tray with the rear window opened is allowed to flow down toward one or both sides of the left and right sides of the rear surface portion. A construction machine having a structure in which a rainwater guide member for discharging outside the living space is provided along a rear surface portion. The rear surface portion of the cab includes a left rear pillar, a right rear pillar, a ceiling pillar, a reinforcing bracket that reinforces the space between the left rear pillar and the right rear pillar, the left rear pillar, the right rear pillar, the ceiling pillar, and a reinforcing bracket. The rear window provided surrounded by, and a rear panel that covers a lower part than the rear window between the left rear pillar and the right rear pillar,
2. The construction machine according to claim 1, wherein the rainwater guide member is formed as a bowl-shaped body attached to the reinforcing bracket or the rear panel and inclined downward toward the left side surface portion and / or the right side surface portion of the cab. The left side surface portion and / or the right side surface portion of the cab include an outer panel that forms an outer shape of the cab, and an inner panel that is disposed inside the outer panel and has a through hole at a position corresponding to the lower end side of the rainwater guide member. Consisting of
The rainwater flowing down through the rainwater guide member flows between the outer panel and the inner panel through the through hole, and is discharged from the lower side of the outer panel and the inner panel to the outside of the cab. The construction machine described. The rear window of the cab consists of a left window and a right window, of which the right window is fixed and the left window opens and closes,
The left side surface portion of the cab has an outer panel that forms an outer shape of the cab and has an outer window opening, and an inner panel that is disposed inside the outer panel and has an inner window opening at a position corresponding to the outer window opening. A side window supported via a window frame member between the inner window opening of the inner panel and the outer window opening of the outer panel,
The rear surface portion of the cab is attached with a concealing plate that is located on the left side thereof and blocks between the inner surface of the rear surface portion of the cab and the rear tray.
3. The construction machine according to claim 1, wherein the concealing plate is configured to enter the cab with the rear window opened and allow rainwater received by the concealing plate to flow down toward the window frame member. The window frame member is provided with an opening that communicates between the outer panel and the inner panel,
The construction machine according to claim 4, wherein rainwater that has flowed down from the concealment plate to the window frame member is discharged to the outside of the cab through the opening.

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