JP7622513B2 - Construction machinery cab - Google Patents

Description

The present invention relates to a cab for a construction machine.

Generally, construction machines such as hydraulic excavators are made up of a lower traveling body and an upper rotating body, and the upper rotating body is equipped with an attachment with an arm and a cab that serves as a driver's compartment where an operator sits to operate the machine.

In recent years, an increasing number of construction machines are being equipped with air conditioning units in the cab so that workers can operate the machine in comfort. The air conditioning unit has an outside air filter to prevent dust and other foreign matter from the outside from being introduced into the cab along with the outside air.

For example, Patent Document 1 discloses an air conditioning system for a hydraulic excavator in which the air conditioning unit is attached to the right side wall of the cab so that it can be removed from inside and outside the cab during maintenance after installation on the vehicle. Patent Document 2 discloses a construction machine in which a filter housing section is provided that opens into the cab box at the middle of an outside air duct that passes between the side of the cab box and the side of the driver's seat.

Patent No. 4261962 Patent No. 5612134

In construction machinery equipped with such air conditioning units, there is a demand to make the interior of the cab a more comfortable working space that is convenient and looks good.

However, in Patent Document 1, the outside air filter is configured to be removable from an outside air inlet opening outside the cab, and therefore cannot be removed from inside the cab. In Patent Document 2, the filter insertion port of the outside air filter is configured to include a filter housing portion that opens upward inside the cab box, and the outside air filter can be removed from inside the cab, but the filter insertion port is located to the side of the driver's seat and opens upward, so the outside air filter and the filter insertion port are easily visible from the driver's seat.

If the outside air filter could be made removable from inside the cabin, maintenance would be easier, but because the inside of the cab is a small, limited space, installing the outside air filter in a location that makes it easy to remove would mar the appearance of the inside of the cab, creating a problem in that convenience and appearance cannot be achieved at the same time.

The present invention was made in consideration of these points, and its purpose is to provide a cab for construction machinery that is convenient from the inside and looks good.

To achieve the above object, the first invention is a cab for a construction machine, comprising a driver's seat arranged within the cab, a wall surface covering the driver's seat, and an air conditioning unit provided within the wall surface and having an outside air filter for intake of outside air, the outside air filter being configured to be removable from the inside of the vehicle through an opening provided in the wall surface, and the opening being covered by a removable article holder.

According to the above configuration, the outside air filter can be attached and detached from inside the cab, making maintenance easy. In addition, the opening for removing the outside air filter is covered with an item holder that can be used by the operator operating the vehicle as a small item holder or cup holder. By using the item holder to cover the opening, the outside air filter is not visible to the operator, making it possible to achieve both a good appearance and convenience inside the cab. As the item holder is detachable, the inside of the item holder is easy to clean.

The second invention is the first invention, characterized in that it includes a duct that holds the outside air filter within the wall surface and a support member to which the article holder is attached and detached, and the support member has a covering portion that covers the opening and can abut against the duct, and an insertion hole provided in the covering portion through which the outside air filter can be inserted.

According to the above configuration, the covering part that covers the opening abuts against the duct, so that when the outdoor air filter is removed, the duct that holds the outdoor air filter is not pulled out together with the outdoor air filter, and the outdoor air filter can be easily removed.

The third invention is characterized in that in the first or second invention, a bottom plate portion that supports the bottom of the article holder is formed at the lower part of the covering portion.

According to the above configuration, the bottom plate portion supports the bottom of the item holder, thereby preventing the item holder from falling off due to vibrations that occur while the construction machine is traveling or working.

The fourth invention is characterized in that in any one of the first to third inventions, the opening is provided to the side or in front of the driver's seat, and the outside air filter is configured to be removable by pulling it out in the left-right direction.

With the above configuration, the opening is located in a position that is easy to handle from the driver's seat, making it easier to remove the outside air filter and increasing the convenience of the item holder that covers the opening. Although the opening is located in a position that is easily visible from the driver's seat, it does not detract from the appearance, which is why the configuration of the present invention is very significant.

The fifth invention is the fourth invention, wherein the article holder has a detachable operating part at the front end that can be attached to and detached from the opening, and the detachable operating part engages with the opening.

According to the above configuration, by providing the attachment/detachment operating part at the front end of the item holder, which is far from the driver's seat, it is possible to prevent an operator in the driver's seat from accidentally touching the attachment/detachment operating part and causing the item holder to fall off.

In the sixth invention, in any one of the first to fifth inventions, the item holder is provided with an elastic member extending from the wall side toward the inside of the room, and the wall side end of the elastic member presses the end of the outside air filter toward the wall side, and when an item is placed in the item holder, the indoor side end presses the item toward the inside of the room.

According to the above configuration, the wall side end of the elastic member presses the end of the outside air filter toward the wall side, thereby fixing the item holder and preventing it from rattling. In addition, the indoor side end presses the item toward the indoor side, fixing the item in the item holder.

It is possible to provide a construction machinery cab that is both convenient and looks good on the inside.

1 is a schematic side view of a hydraulic excavator according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of an upper rotating body showing the inside of a cab according to the embodiment. FIG. FIG. 4 is a side view showing the front right side inside the cab. 1 is a side view of the air conditioning cover facing the interior side, showing the state in which the support member is attached. FIG. FIG. 2 is a perspective view of a support member according to the embodiment. FIG. 4 is a side view showing the right front inside the cab with the cup holder removed. 8 is an end view taken along line VIII-VIII in FIG. 4. 1 is a perspective view of a cup holder according to the embodiment of the present invention as viewed from the inside of a vehicle. 2 is a perspective view of the cup holder according to the embodiment, seen from the wall surface side. FIG. FIG. 4 is a perspective view for explaining the positions of a cup holder and an outside air filter. 13 is a bottom view for explaining a guide portion of the cup holder. FIG. 11 is a perspective view showing a procedure for attaching and detaching the cup holder and the outside air filter. FIG. 11 is a perspective view showing a procedure for attaching and detaching the cup holder and the outside air filter. FIG. 11 is a perspective view showing a procedure for attaching and detaching the cup holder and the outside air filter. FIG. 11 is a perspective view showing a procedure for attaching and detaching the cup holder and the outside air filter. FIG. 11 is a perspective view showing a procedure for attaching and detaching the cup holder and the outside air filter. FIG. 11 is a perspective view showing a procedure for attaching and detaching the cup holder and the outside air filter. FIG.

The following describes an embodiment of the present invention with reference to the drawings. Note that the following description of the preferred embodiment is essentially merely illustrative and is not intended to limit the present invention, its applications, or its uses.

In some drawings, directions are indicated with arrows, with the direction of travel of the lower traveling body being the front-to-rear direction, the left-to-right direction as seen from the driver's seat being the left-to-right direction, and the up-to-down direction of the lower traveling body being the up-to-down direction. Also, for convenience when explaining the configuration of the cab walls, the left-to-right direction is described as the direction toward the interior and the wall as seen from inside the cab. Unless otherwise stated, explanations will be given in accordance with the directions indicated by these arrows, and the direction of the rotating upper rotating body will be based on the state shown in Figure 1.

The construction machine 1 is, for example, a hydraulic excavator, and as shown in FIG. 1, it has a crawler-type lower traveling body 2 and an upper rotating body 3 that is mounted so as to be freely rotatable on the lower traveling body 2. An attachment 4, a cab 5, a counterweight 8, etc. are arranged on the upper rotating body 3.

As shown in FIG. 2, the upper rotating body 3 has a bracket 7 at approximately the center of the front end. Although omitted in FIG. 2, the attachment 4 is supported by the bracket 7 so that it can swing left and right. A machine room 6 is provided from approximately the center of the upper rotating body 3 to the right, and houses an engine, hydraulic pump, etc. (not shown). A cab 5, which is a box-shaped operator's cabin where an operator sits, is provided from approximately the center of the upper rotating body to the left. In addition, a counterweight 8 is provided behind the cab 5 and the machine room 6.

Inside the cab 5, a driver's seat 20 is installed on the floor 10, and the driver's seat 20 is surrounded by walls 11 and glass surfaces 12, separating it from the outside.

A travel lever 21 and travel pedals 22 are installed in front of the driver's seat 20. The pair of left and right travel levers 21, 21 are levers that control the travel direction of the crawler, and extend upward from the floor surface 10 toward the driver's seat 20. The pair of left and right travel pedals 22, 22 are pedals that control the travel speed of the crawler, and are installed on the floor surface 10 so that the operator can operate them by stepping on them.

Control boxes 23a and 23b are installed on both the left and right sides of the driver's seat 20. The control boxes 23a and 23b have operating levers 24a and 24b, respectively, at the upper front side. The operating levers 24a and 24b are levers that operate the attachment 4.

As shown in FIG. 3, the cab 5 has a front glass surface 12a in front of the driver's seat 20, a right glass surface 12b on the right side, and a door section (not shown) with a glass surface on the left side, and these glass surfaces 12a, 12b ensure the operator's visibility. In addition, below the right glass surface 12b, a wall surface 11 is provided that covers a console (not shown) and an air conditioning unit, which will be described later. In this embodiment, the right control box 23a forms part of the wall surface 11.

A number of air conditioning unit blowout sections 25 are provided on the upper part of the wall surface 11, and a display 26 is installed in front of the operating lever 24a. As shown in FIG. 4, an air conditioning cover 30 facing the interior of the room is provided below the display 26, and the air conditioning cover 30 is connected to the front side of the control box 23a on the right side, and together with the control box 23a, forms the wall surface 11. The air conditioning cover 30 is provided with blowout sections 25 at two locations, one above and one below, and an item holder 50 is detachably attached between the blowout sections 25, 25. The item holder 50 is a holder or small container that can hold various items, and the type is not particularly limited, but in this embodiment, for example, it is a cup holder 50 that can hold a drinking cup or a bottle.

Figure 5 is a side view of the air conditioning cover 30 as seen from the inside of the cab 5. The air conditioning cover 30 has blow-out holes 31, 31 at the front upper and lower parts thereof through which air conditioned by the air conditioning unit is blown into the cab 5. The blow-out hole 31 is fitted with the blow-out part 25. An opening 32 is provided between the blow-out holes 31, 31. During maintenance, the outside air filter 41 can be removed from the inside of the vehicle through the opening 32. A support member 60 to which the cup holder 50 is attached and detached is attached to the opening 32 from the outside of the vehicle. The front end of the opening 32 has an engagement part 32a in which the approximate center part is cut out toward the front and the edge part protrudes toward the inside of the vehicle. The rear end of the opening 32 has a cut-out part 32b in which the approximate center part is cut out toward the rear. The lower part of the air conditioning cover 30 has an inside air introduction hole 33 in the form of a slit for introducing inside air.

The support member 60 is a plate-shaped member, and as shown in FIG. 6, has a covering portion 61 that covers the opening 32, and a bottom plate portion 62 formed by bending the lower portion of the covering portion 61 toward the inside of the vehicle. The covering portion 61 is provided with an insertion hole 61a through which the outside air filter 41 can be inserted. The bottom plate portion 62 supports the bottom of the cup holder 50. By the bottom plate portion 62 supporting the bottom of the cup holder 50, it is possible to prevent the cup holder 50 from falling off due to vibrations that occur while the construction machine 1 is traveling or working.

The rear end of the support member 60 has a notch 61b formed in the approximate center. This notch 61b, together with the notch 32b provided in the opening 32, forms an insertion hole into which the insertion piece 57 of the cup holder 50 (described later) is inserted.

The opening 32 is covered by the cup holder 50 except when the outside air filter 41 is being maintained. When the cup holder 50 is removed, the end of the outside air filter 41 becomes visible through the opening 32 and the insertion hole 61a, as shown in FIG. 7.

As shown in FIG. 8, an air conditioning unit 40 is provided inside the wall 11, and an air conditioning cover 30, which is part of the wall 11, covers the air conditioning unit 40 from the interior side of the cab 5.

The air conditioning unit 40 has an outside air filter 41 for intake of outside air. The air conditioning unit introduces inside air through an inside air filter 43 installed in the inside air inlet 33, and introduces outside air through the outside air filter 41. The temperature of the introduced inside air and outside air is adjusted by a heat exchanger (not shown), and the air is blown toward the indoor side from multiple blowing sections 25 installed on the upper and side parts of the wall surface 11.

The outside air filter 41 is a plate-shaped filter member that extends in the left-right direction, its outer periphery is covered by a duct 42, and it is held within the wall surface 11. At the indoor end of the outside air filter 41, a handle portion 41a that protrudes from within the wall surface 11 to the indoor side. During maintenance, a worker can remove and install the outside air filter 41 by grasping the handle portion 41a and sliding it in the left-right direction.

The outdoor air filter 41 can be removed from the indoor side through the opening 32 provided in the air conditioning cover 30 and the insertion hole 61a provided in the support member 60. The opening 32 is formed larger than the indoor end of the duct 42 that holds the outdoor air filter 41, but the insertion hole 61a is larger than the outdoor air filter 41 and smaller than the indoor end of the duct 42. As shown in FIG. 8, the outdoor side surface of the covering part 61 can abut against the indoor end of the duct 42, so the support member 60 plays the role of a stopper for the duct 42. In addition, in order to stably fix the duct 42, it is preferable that the outdoor side surface of the covering part 61 and the indoor end of the duct 42 are in surface contact. With this configuration, even if the outdoor air filter 41 is pulled out to the indoor side, the duct 42 is not pulled out together, making maintenance easy.

Next, the cup holder 50 will be described in detail. As shown in Figures 9 and 10, the cup holder 50 is a generally cylindrical holder with a bottom 51, into which a drinking cup or the like is inserted from the top and held. When the cup storage section 52 is viewed from above, the indoor side wall section 52a that protrudes into the room is formed in a generally arc shape, and the wall surface side wall section 52b is formed in a generally semicircular arc shape that is generally linear along the wall surface 11. The indoor side wall section 52a has a cutout section 53 that opens upward at the indoor end, so that the handle of a mug or the like can be inserted into the cutout section 53.

The wall-side sidewall portion 52b has support pieces 54, 54 that extend toward the wall at two locations spaced apart in the front-to-rear direction. As shown in FIG. 8, the support pieces 54, 54 abut against the covering portion 61 when attached to the wall surface 11, thereby enhancing the stability of the cup holder 50. The support pieces 54, 54 have slits 54a formed on the opposing surfaces from the wall-side end toward the interior side of the vehicle. The wall-side sidewall portion 52b also has an elastic member 70 that extends from the wall side toward the interior side of the vehicle.

The elastic member 70 is formed of, for example, a sheet rubber, and has a wall side end 70a extending in the front-rear direction and a generally T-shaped shape in plan view, extending from approximately the center of the wall side end 70a toward the interior side. The elastic member 70 is guided at both front and rear ends by the slit 54a of the support piece 54, and is inserted into an insertion hole provided in approximately the center of the wall side side wall portion 52b to extend from the wall side to the interior side. Since the wall side end 70a extends slightly further to the wall side than the interior side end of the handle portion 41a of the outside air filter 41, the handle portion 41a can be pressed toward the wall side to fix the cup holder 50 and prevent rattling. In addition, when a cup or the like is placed in the cup holder 50, the interior side end of the elastic member 70 can press the cup or the like toward the interior side to fix the cup or the like.

The cup holder 50 has a wall surface end of the interior side wall portion 52a, a wall surface end of the bottom portion 51, and an upper end of the wall surface side wall portion 52b that extend toward the wall surface from the wall surface side wall portion 52b to form a frame-shaped extension portion 55. As shown in FIG. 11, the interior side end of the outside air filter 41 that protrudes from the wall surface 11 toward the interior of the room is stored in the space formed by this extension portion 55.

A detachable operating section 56 is formed at the front end of the extension section 55. The detachable operating section 56 is an elastically deformable locking claw that extends from the extension section 55 towards the wall surface and is folded back towards the inside of the room. The detachable operating section 56 has a protrusion 56a that protrudes towards the front, and the protrusion 56a is engaged with the wall surface side of the opening 32 to prevent it from falling off. The detachable operating section 56 has multiple ribs 56b for reinforcement on the inside of the folded back section. In addition, the end of the detachable operating section 56 extends forward, and an operating knob 56c is formed.

An insertion piece 57 is formed at the rear end of the extension 55. The insertion piece 57 extends from the extension 55 toward the wall surface, and the wall surface end is bent toward the rear. The insertion piece 57 is inserted into an insertion hole formed by the notch 61b provided in the support member 60 and the notch 32b provided in the opening 32, and the attachment/detachment operation part 56 is engaged with the engagement part 32a of the opening 32, thereby attaching the cup holder 50 to the opening 32. If the attachment/detachment operation part 56 that engages with the opening 32 is provided at the front end of the cup holder 50 far from the driver's seat 20, it is possible to prevent the operator at the driver's seat 20 from accidentally touching the attachment/detachment operation part 56 and causing the cup holder 50 to fall off.

As shown in FIG. 12, the bottom of the cup holder 50 is provided with a guide portion 51a that guides the bottom plate portion 62 of the support member 60. The guide portion 51a is a U-shaped rib that opens on the wall side, and the front portion is inclined backward from the wall side toward the interior side of the room. When installing the cup holder 50, after the rear insertion piece 57 is inserted into the opening 32, when the front attachment/detachment operation portion 56 is engaged with the engagement portion 32a, the bottom plate portion 62 is guided by the guide portion 51a, making installation easy.

Next, the procedure for removing and installing the cup holder 50 when performing maintenance on the outside air filter 41 will be described with reference to Figures 13 to 18.

As shown in FIG. 13, except during maintenance, the cup holder 50 is attached to the opening 32, and the outside air filter 41 inside the opening 32 cannot be seen from the inside of the room. When removing the cup holder 50 during maintenance, first, the front operation knob 56c is pushed backward to elastically deform the attachment/detachment operation part 56, and as shown in FIG. 14, the engagement with the engagement part 32a is released. Next, the rear insertion piece 57 is pulled out from the insertion hole formed by the support member 60 and the cutout parts 61b, 32b provided in the opening 32, and the cup holder 50 can be removed.

When the cup holder 50 is removed, the outside air filter 41 can be seen through the opening 32 and the insertion hole 61a, as shown in FIG. 15. Grasp the handle portion 41a of the outside air filter 41 and pull it toward the inside of the room to remove it, as shown in FIG. 16.

After replacing or cleaning the outside air filter 41, when returning the outside air filter 41 to the air conditioning cover 30, insert the outside air filter 41 by aiming it at the insertion hole 61a of the support member 60 as shown in FIG. 17.

Next, insert the insertion piece 57 of the cup holder 50 into the insertion hole formed by the support member 60 and the notches 61b, 32b provided in the opening 32, and then, as shown in FIG. 18, push the attachment/detachment operating part 56 into the engagement part 32a to engage it, so that the opening 32 is covered by the cup holder 50, and the outside air filter 41 is not visible, creating a good-looking state.

In the construction machine of this embodiment configured as described above, the outside air filter 41 can be attached and detached from the inside of the cab 5, making maintenance easy. In addition, the opening 32 for removing the outside air filter 41 is covered by a cup holder 50. By having the cup holder 50 act as a lid for the opening 32, the outside air filter 41 is not visible to the worker, making it possible to achieve both a good appearance and convenience inside the cab 5. In addition, since the cup holder 50 is detachable, cleaning is easy.

In addition, in this embodiment, the opening 32 is provided in front of the driver's seat 20, but it may be provided in any position that is easy to handle from the driver's seat 20, or on the side of the driver's seat 20. Although the front and side of the driver's seat 20 are easily visible positions, the opening 32 is covered by the cup holder 50, so it is possible to achieve both convenience and good looks.

REFERENCE SIGNS LIST 1 Construction machine 2 Undercarriage 3 Upper revolving body 4 Attachment 5 Cab 11 Wall surface 20 Driver's seat 30 Air conditioning cover 31 Air outlet 32 Opening 32a Engagement portion 32b Cutout portion 40 Air conditioning unit 41 Outside air filter 41a Handle portion 42 Duct 50 Cup holder 54 Support piece 56 Attachment/detachment operation portion 57 Insertion piece 60 Support member 61 Cover portion 61a Insertion hole 61b Cutout portion 62 Bottom plate portion 70 Elastic member

Claims (5)

A cab for a construction machine,
A driver's seat disposed within the cab;
A wall surface covering the driver's seat;
an air conditioning unit provided within the wall surface and having an outside air filter for intake of outside air;
the wall surface has an opening through which the outside air filter can be inserted, and a blowout hole provided at a position separated from the opening and through which air of the air conditioning unit is blown out,
The outside air filter is configured to be removable from the indoor side through the opening provided in the wall surface, and the opening is covered by a support member and an article holder that is detachable from the support member .
A cab for a construction machine, characterized in that the support member has a covering portion which covers the opening and an insertion hole provided in the covering portion through which the outside air filter can be inserted . 2. The cab for a construction machine according to claim 1 , wherein a bottom plate portion for supporting a bottom portion of the article holder is formed on a lower portion of the covering portion. 3. The cab of a construction machine according to claim 2 , wherein the opening is provided to the side or in front of the driver's seat, and the outside air filter is configured to be removable by being pulled out in the left-right direction. 4. The cab for a construction machine according to claim 3 , wherein the article holder has an attachment/detachment operating portion at a front end portion thereof which is attachable to and detachable from the opening, and the attachment/detachment operating portion is engaged with the opening. The article holder includes an elastic member extending from the wall surface side toward the interior side of the room,
A cab for a construction machine as described in any one of claims 1 to 4, characterized in that the elastic member has a wall side end pressing the end of the outside air filter toward the wall side, and when an item is placed in the item holder, the interior side end pressing the item toward the interior side.

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