JP7403989B2 - excavator - Google Patents

Description

The present invention relates to a shovel as an excavator.

2. Description of the Related Art Conventionally, an excavator is known in which an outside air filter provided at an outside air inlet of an air conditioning system installed in a driver's cab can be easily attached and removed (see Patent Document 1).

Japanese Patent Application Publication No. 2009-18599

In the above-mentioned excavator, the inside air inlet of the air conditioning system is arranged at a position close to the floor of the driver's cab, that is, at a position where foreign matter such as paper pieces or vinyl pieces is likely to accumulate. Therefore, when the inside air filter provided at the inside air inlet is removed from the inside air inlet in order to clean the inside air filter, there is a risk that foreign matter may enter the air conditioning system. This is because when the inside air filter is removed, there is no member to block foreign matter passing through the inside air inlet.

In view of the above, it is desirable to provide an excavator configured to more reliably prevent foreign matter from entering the air conditioning system.

An excavator according to an embodiment of the present invention includes a lower traveling body, an upper rotating body rotatably attached to the lower traveling body, a driver's cab attached to the upper rotating body, and a driver's seat installed in the driver's cab. an air conditioning unit installed in the driver's cab; an inside air filter located below the seating area of the driver's seat through which the inside air supplied to the air conditioning unit passes; and an inside air filter through which the inside air supplied to the air conditioning unit passes. a foreign matter intrusion prevention member that is coarser than the inside air filter, and the foreign matter intrusion prevention member is arranged inside the driver's cab at a position closer to the air conditioning unit than the support frame of the driver's seat. It is integrated into a inside air introduction passage for taking in a certain air into the air conditioning unit , is arranged adjacent to the inside air filter, and is configured to cover the same flow path area as that covered by the inside air filter. ing.

The above-mentioned shovel can more reliably prevent foreign matter from entering the air conditioning system.

FIG. 3 is a left side view of the excavator. FIG. 3 is a left side view of the interior of the cabin. It is a sectional view of a cabin. FIG. 3 is a left side view of the driver's seat. It is a sectional view of a cabin. FIG. 1 is a perspective view of an air conditioning system.

FIG. 1 shows an excavator 100 as a construction machine according to an embodiment of the present invention. The excavator 100 includes an undercarriage body 1 and an upper revolving body 3 rotatably mounted on the undercarriage body 1 via a turning mechanism 2 . A cabin 10 serving as a driver's cab is provided at the left front portion of the upper revolving structure 3. A cover 10C that covers an outside air inlet for introducing outside air into the cabin 10 is attached to the left side of the cabin 10, and a door 10D is attached to the front side of the cover 10C. In the example shown in FIG. 1, the cover 10C is configured such that outside air is sucked into the outside air introduction path through a gap around the cover 10C. However, the cover 10C may be made of a metal plate having a plurality of ventilation holes.

A boom 4 is rotatably attached to the central front part of the upper revolving body 3. An arm 5 is rotatably attached to the tip of the boom 4, and a bucket 6 is rotatably attached to the tip of the arm 5. The boom 4 is driven by a boom cylinder 7, the arm 5 is driven by an arm cylinder 8, and the bucket 6 is driven by a bucket cylinder 9.

FIG. 2 is a left side view of the interior of the cabin 10. FIG. 3 is a sectional view of the cabin 10, showing a cross section of the cabin 10 on a virtual plane parallel to the XY plane including the dashed line L1 shown in FIG. The dotted arrows shown in FIG. 3 represent air flows. FIG. 4 is a left side view of the driver's seat DS installed inside the cabin 10.

As shown in FIG. 2, inside the cabin 10, an air conditioning system AC, a driver's seat DS, an operating device 26, etc. are installed.

The driver's seat DS is configured so that an operator of the excavator 100 can sit therein. The driver's seat DS is fixed to the floor of the cabin 10 via the support frame SF.

The support frame SF is a member that supports the driver's seat DS. The driver's seat DS may be attached to the support frame SF via a seat rail or the like so that it can slide on the support frame SF in the front-rear direction (X-axis direction). In this embodiment, the support frame SF is a pair of left and right metal plates that support the driver's seat DS, as shown in FIG. and a support frame SFR. The support frame SF may be made of synthetic resin. The support frame SF may be a box console that covers the air conditioning unit 40.

In this embodiment, the driver's seat DS includes a seating part SP, a backrest part BR, a headrest part HR, an armrest part AM, and a console CS, as shown in FIG. In FIG. 4, for clarity, illustration of the backrest part BR and headrest part HR is omitted, and the seating part SP is invisible.

The seating part SP is a member that supports the buttocks and thighs of the operator. The backrest portion BR is a member that supports the operator's back. The headrest portion HR is a member that supports the operator's head.

The armrest part AM is a member that supports the operator's elbow. In this embodiment, the armrest part AM includes a left armrest part AML configured so that the operator can place the elbow of the left arm, and a right armrest part AML configured so that the operator can place the elbow of the right arm. It includes an armrest AMR (not visible in Figure 2).

The console CS is a member to which an operating lever as the operating device 26 is attached. In this embodiment, the console CS includes a left console CSL and a right console CSR (not visible in FIG. 2). The left console CSL is fixed to the left support frame SFL, and the right console CSR is fixed to the right support frame SFR.

The operating device 26 is a device used by an operator to operate an actuator mounted on the shovel 100. In this embodiment, the actuator includes a boom cylinder 7, an arm cylinder 8, a bucket cylinder 9, a travel hydraulic motor 2M, a swing hydraulic motor (not shown), and the like. The traveling hydraulic motor 2M includes a left traveling hydraulic motor for driving the left crawler and a right traveling hydraulic motor for driving the right crawler.

Specifically, the operating device 26 includes a left operating lever 26L, a right operating lever 26R (not visible in FIG. 2), a left running lever 26DL, a right running lever 26DR (not visible in FIG. 2), a left running pedal 26PL, and a right running lever 26L. It includes a pedal 26PR (not visible in FIG. 2).

In this embodiment, the left operating lever 26L is operated in the front-rear direction when extending and contracting the arm cylinder 8, and is operated in the left-right direction when rotating the swing hydraulic motor. The right operating lever 26R is operated in the front-rear direction when extending or contracting the boom cylinder 7, and is operated in the left-right direction when extending or contracting the bucket cylinder 9. However, the left operating lever 26L may be configured as an operating device 26 for moving two other actuators. The same applies to the right operating lever 26R. The left travel lever 26DL is operated in the front-rear direction when rotating the left travel hydraulic motor, and the right travel lever 26DR is operated in the front-rear direction when rotating the right travel hydraulic motor. The same applies to the left travel pedal 26PL and the right travel pedal 26PR.

The air conditioning system AC is configured to be able to adjust the condition of the air inside the cabin 10. The air condition is, for example, temperature or humidity. In this embodiment, the air conditioning system AC includes an air conditioning unit 40, an inside air introduction path 41, an outside air introduction path 42, and a ventilation duct 43, as shown in FIG.

The air conditioning unit 40 is a device unit that integrally includes devices for adjusting the air condition, such as a blower, a heat exchanger, and a humidifier.

The inside air introduction path 41 is an air passage for taking air inside the cabin 10 into the air conditioning unit 40. A inside air filter 50 is arranged in the inside air introduction path 41 . Furthermore, a foreign matter intrusion prevention member 51 is arranged at the inside air introduction port 41M of the inside air introduction path 41.

The inside air filter 50 is a member for removing dust and the like contained in the air passing through the inside air introduction path 41. In this embodiment, the inside air filter 50 includes a filter section 50F and a holder section 50H.

The filter section 50F is a frame member to which a filter element is attached, and is installed inside the inside air introduction path 41 so as to block the inside air introduction path 41. That is, the filter section 50F is arranged so that the air that has passed through the filter section 50F is supplied to the air conditioning unit 40. In this embodiment, the filter element is made of nonwoven fabric.

The holder portion 50H is a portion used when an operator who inspects or cleans the filter portion 50F removes the filter portion 50F from the inside air introduction path 41. In this embodiment, the holder portion 50H is provided with a handle that can be held by the operator. However, the holder portion 50H may be provided with a knob that can be held by the operator, or may be provided with a finger hole into which the operator's finger is inserted. The operator can pull out the filter part 50F from the inside air introduction path 41 by moving the holder part 50H in the direction indicated by arrow AR1 in FIG. 2 while holding the handle. In this case, the filter section 50F may be slid along a guide section such as a guide rail.

Note that the inside air introduction path 41 is desirably closed so that when the inside air filter 50 is removed from the inside air introduction path 41, foreign matter does not enter through the gap created in the part where the inside air filter 50 was disposed. It is configured so that it can be removed.

The foreign matter intrusion prevention member 51 is a member for preventing foreign matter from entering the air conditioning unit 40. In this embodiment, the foreign matter intrusion prevention member 51 is integrated with the left support frame SFL of the driver's seat DS. Therefore, the foreign matter intrusion prevention member 51 constitutes a part of the left support frame SFL. Note that the left support frame SFL is arranged so as to close the inside air introduction port 41M.

As shown in FIG. 4, the foreign matter intrusion prevention member 51 is integrated into the left support frame SFL as a part of the left support frame SFL. The foreign matter intrusion prevention member 51 is provided with a plurality of ventilation holes. The plurality of ventilation holes are typically formed by punching. The shape and size (for example, hole diameter) of the ventilation hole are arbitrarily determined depending on the object to be captured. In this embodiment, the foreign matter intrusion prevention member 51 constitutes a part of the rear side (-X side) of the left support frame SFL, but it constitutes a part of the front side (+X side) of the left support frame SFL. Alternatively, the center portion of the left support frame SFL may be configured. Alternatively, the foreign matter intrusion prevention member 51 may constitute the entire left support frame SFL. That is, the plurality of ventilation holes may be formed over the entire surface of the left support frame SFL.

The foreign matter intrusion prevention member 51 may be configured as a member that can be attached to and detached from the left support frame SFL. In this case, the foreign matter intrusion prevention member 51 may be made of a material different from that of the support frame SF, such as synthetic resin. The foreign matter intrusion prevention member 51 may be fixed to the left support frame SFL using a fastening member such as a bolt or a screw.

The foreign matter intrusion prevention member 51 may be a member in which a slit-shaped vent is formed, a member in which a louver-shaped vent is formed, or a net member such as a dustproof net. . Further, the foreign matter intrusion prevention member 51 may be a frame member to which a filter element made of nonwoven fabric is attached, similar to the filter part 50F of the inside air filter 50. In this case, the filter portion 50F of the inside air filter 50 as the first filter and the foreign matter intrusion prevention member 51 as the second filter can constitute a double filter structure.

The foreign matter intrusion prevention member 51 is desirably configured to cover a flow passage area smaller than the flow passage area covered by the filter portion 50F of the inside air filter 50. Since the size of the ventilation hole formed in the foreign matter intrusion prevention member 51 is significantly larger than the hole diameter of the filter part 50F, the flow path area covered by the foreign matter intrusion prevention member 51 is larger than the flow path area covered by the filter part 50F. This is because even if the amount of air passing through the filter section 50F is small, the amount of air passing through the filter section 50F is not excessively restricted. This is also because the smaller the flow path area covered by the foreign matter intrusion prevention member 51, the smaller the amount of foreign matter that enters the inside of the inside air introduction path 41. However, the foreign matter intrusion prevention member 51 may be configured to cover a flow path area that is greater than or equal to the flow path area covered by the filter portion 50F of the inside air filter 50.

In FIG. 2, illustration of the foreign matter intrusion prevention member 51 is omitted, and a part of the filter portion 50F of the inside air filter 50 disposed inside the inside air introduction path 41 is shown exposed from the inside air introduction port 41M. There is. On the other hand, in FIG. 4, the foreign matter intrusion prevention member 51 is illustrated, and the filter portion 50F of the inside air filter 50 disposed inside the inside air introduction path 41 is covered by the foreign matter intrusion prevention member 51 and is invisible. It is shown.

The outside air introduction path 42 is an air passage for taking air outside the cabin 10 into the air conditioning unit 40. As shown in FIG. 3, an outside air filter 52 is arranged at the outside air introduction port 42M of the outside air introduction path 42. As shown in FIG.

Specifically, the outside air filter 52 disposed at the outside air inlet 42M is surrounded by an edge 42E (see FIG. 6). The edge 42E is configured to block communication between the space inside the cabin 10 and the space in which the outside air filter 52 is arranged. With this configuration, the edge portion 42E can prevent foreign matter present in the cabin 10 from entering the outside air introduction path 42 when the outside air filter 52 is removed from the outside air introduction port 42M. In the present embodiment, the edge 42E extends along the outer wall of the cabin 10 so that the outside space and the space in which the outside air filter 52 is arranged communicate with each other, and so that the outside space and the space inside the cabin 10 do not communicate with each other. It is connected to the constituent members. The space in which the outside air filter 52 is arranged is closed by the cover 10C, and the outside air reaches the outside air filter 52 through a gap around the cover 10C.

The outside air filter 52 is a member for removing dust and the like contained in the air entering the outside air introduction path 42. In this embodiment, the outside air filter 52 is a frame member to which a filter element is attached, and is installed so as to block the outside air introduction port 42M. That is, the outside air filter 52 is arranged so that the air that has passed through the outside air filter 52 is supplied to the air conditioning unit 40. In this embodiment, the filter element is made of nonwoven fabric.

The ventilation duct 43 is an air passage for sending air conditioned by the air conditioning unit 40 into the interior of the cabin 10. In this embodiment, the air conditioned by the air conditioning unit 40 passes through the ventilation duct 43 and is sent into the cabin 10 from an air outlet 43M, which is one of the plurality of air outlets installed in the cabin 10. .

In addition, in FIG. 3, for clarity, the inside air introduction path 41 and the outside air introduction path 42 are shown as merging in front of the air conditioning unit 40, but in reality, the inside air introduction path 41 and the outside air introduction path 42 can be switched between an inside air circulation mode in which only the inside air passing through the inside air introduction path 41 is supplied to the air conditioning unit 40 and an outside air introduction mode in which only outside air passing through the outside air introduction path 42 is supplied to the air conditioning unit 40. It is configured as follows.

With the above-described configuration, the foreign matter intrusion prevention member 51 can prevent foreign matter from passing through the inside air introduction path 41 and reaching the air conditioning unit 40 even when the inside air filter 50 is removed from the inside air introduction path 41.

Note that although the foreign matter intrusion prevention member 51 is arranged on the upstream side of the inside air filter 50, it may be arranged on the downstream side of the inside air filter 50. In this case, the foreign matter intrusion prevention member 51 is configured to be detachable, and may have a holder portion for pulling out the foreign matter intrusion prevention member 51 from the inside air introduction path 41 similarly to the inside air filter 50.

Next, a foreign matter intrusion prevention member 51A, which is another configuration example of the foreign matter intrusion prevention member 51, will be described with reference to FIGS. 5 and 6. FIG. 5 is a sectional view of the cabin 10 and corresponds to FIG. The dotted arrows shown in FIG. 5 represent air flows. FIG. 6 is a perspective view of the air conditioning system AC.

The foreign matter intrusion prevention member 51A shown in FIGS. 5 and 6 is integrated with the member constituting the inside air introduction path 41, and the foreign matter intrusion prevention member 51A shown in FIGS. 2 to 4 is integrated with the left support frame SFL. This is different from the foreign matter intrusion prevention member 51 shown in FIG.

Specifically, the foreign matter intrusion prevention member 51A is a frame member fixed to the inside air introduction port 41M of the inside air introduction path 41, and a filter element is attached thereto. The filter element is made of, for example, nonwoven fabric. The foreign matter intrusion prevention member 51A may be configured to be detachable from the inside air introduction port 41M. In this case, the frame member serving as the foreign matter intrusion prevention member 51A may be formed of the same material as the member constituting the inside air introduction path 41. The material of the member constituting the inside air introduction path 41 is typically a synthetic resin. The foreign matter intrusion prevention member 51A may be removably attached to the member constituting the inside air introduction path 41 using a snap-fit structure. The material of the member constituting the inside air introduction path 41 may be metal. Further, the foreign matter intrusion prevention member 51A may be fixed to a member constituting the inside air introduction path 41 using a fastening member such as a bolt or a screw.

In this embodiment, the foreign matter intrusion prevention member 51A is arranged adjacent to the filter portion 50F of the inside air filter 50.

The pore diameter of the filter element in the foreign matter intrusion prevention member 51A is configured to be larger than the pore diameter of the filter portion 50F of the internal air filter 50. This is because the size of the object to be captured by the foreign matter intrusion prevention member 51A is larger than the size of the object to be captured by the filter section 50F.

Further, the foreign matter intrusion prevention member 51A is configured to cover approximately the same flow path area as that covered by the filter portion 50F of the inside air filter 50. This is because the pore diameter of the filter element in the foreign matter intrusion prevention member 51A is larger than the pore diameter of the filter portion 50F of the inside air filter 50, but is significantly smaller than the vent hole of the foreign matter intrusion prevention member 51 shown in FIGS. 2 to 4. That is, if the flow path area covered by the foreign matter intrusion prevention member 51A is made as small as the flow path area covered by the foreign matter intrusion prevention member 51 shown in FIGS. 2 to 4, the amount of air passing through the filter section 50F will be reduced. This is because it is excessively restricted.

With the above configuration, the foreign matter intrusion prevention member 51A can prevent foreign matter from passing through the inside air introduction path 41 and reaching the air conditioning unit 40 even when the inside air filter 50 is removed from the inside air introduction path 41.

Note that although the foreign matter intrusion prevention member 51A is arranged on the upstream side of the inside air filter 50, it may be arranged on the downstream side of the inside air filter 50. In this case, the foreign matter intrusion prevention member 51A may have a holder portion for pulling out the foreign matter intrusion prevention member 51A from the inside air introduction path 41, similarly to the inside air filter 50.

As described above, the excavator 100 according to the embodiment of the present invention includes the lower traveling body 1, the upper rotating body 3 rotatably attached to the lower traveling body 1, and the cabin serving as a driver's cabin attached to the upper rotating body 3. 10, the driver's seat DS installed in the cabin 10, the air conditioning unit 40 installed in the cabin 10, and the inside air that is supplied to the air conditioning unit 40 located below the seating part SP of the driver's seat DS. It includes a filter 50 and a foreign matter intrusion prevention member 51 that is coarser than the inside air filter 50 and through which the inside air supplied to the air conditioning unit 40 passes.

The reason why the foreign matter intrusion prevention member 51 is a rougher member than the inside air filter 50 is that the diameter of the ventilation hole in the foreign matter intrusion prevention member 51 is larger than the pore diameter of the inside air filter 50. This means that the size of the foreign object captured by the foreign object intrusion prevention member 51 is larger than the size of the foreign object caught by the foreign object intrusion prevention member 51.

This configuration can prevent the intake resistance of inside air from increasing excessively, and can also prevent foreign matter from being taken into the air conditioning unit 40 when the inside air filter 50 is removed from the inside air introduction path 41. This brings about this effect.

Furthermore, this configuration has the effect of making it difficult for the inside air filter 50 to become clogged since relatively large foreign matter is captured by the foreign matter intrusion prevention member 51.

Further, this configuration allows inspection or cleaning of the inside air filter 50 by opening and closing the door 10D while the inside of the cabin 10 is dirty or exposed to wind and rain in a dusty environment such as a construction site. This is particularly effective when there is no choice but to do so. This is because the position where the inside air inlet 41M is arranged is below the seating part SP of the driver's seat DS, that is, at a lower position than the seating part SP, and foreign matter tends to accumulate therein. Further, the inside air inlet 41M is arranged to face the inner wall of the door 10D, and foreign matter outside the inside air inlet 41M is likely to be blown up by the wind blowing in from outside the cabin 10.

For example, in the above-described configuration, even if wind blows into the cabin 10 during cleaning of the inside air filter 50 and foreign objects on the floor inside the cabin 10 are blown up and directed toward the inside air inlet 41M, the foreign object intrusion prevention member 51 can reliably prevent the foreign matter from entering the air conditioning unit 40. The foreign matter in this case is, for example, a cigarette butt, a piece of paper, a piece of vinyl, etc., which is significantly larger than sand dust.

Therefore, it is possible to reliably prevent the occurrence of power failure of the blower motor in the air conditioning unit 40 due to foreign matter being taken into the air conditioning unit 40. As a result, it is possible to reduce the frequency with which maintenance of the air conditioning unit 40 is required, which requires a large number of man-hours and generates high labor costs due to poor accessibility. Note that maintenance of the air conditioning unit 40 includes repair or replacement of the air conditioning unit 40, and the like.

The inside air filter 50 is configured to be detachable. In the embodiment described above, the inside air filter 50 is configured such that the operator can pull out the filter section 50F from the inside air introduction path 41 by moving the holder section 50H in the direction indicated by the arrow AR1 in FIG. It is configured. Even when the inside air filter 50 is pulled out from the inside air introduction path 41 in this way, the foreign matter intrusion prevention member 51 prevents foreign objects from entering the inside of the inside air introduction path 41 through the inside air introduction port 41M. can.

The foreign matter intrusion prevention member 51 may be formed on the support frame SF of the driver's seat DS. That is, the foreign matter intrusion prevention member 51 may be integrated with the support frame SF of the driver's seat DS as a part constituting the support frame SF of the driver's seat DS. For example, the foreign matter intrusion prevention member 51 may be integrated with the left support frame SFL as a part of the left support frame SFL, as shown in FIG.

With this configuration, the function of preventing foreign matter from entering the inside air introduction path 41 can be realized at the stage when the air conditioning system AC and the support frame SF are assembled inside the cabin 10. That is, the function of preventing foreign matter from entering the inside air introduction path 41 can be easily achieved by, for example, simply punching the members constituting the support frame SF to form ventilation holes.

The foreign matter intrusion prevention member 51 may be formed in the air conditioning system AC including the air conditioning unit 40. That is, the foreign matter intrusion prevention member 51 may be integrated with a member that constitutes the air conditioning system AC as a part that constitutes the air conditioning system AC. For example, the frame member serving as the foreign matter intrusion prevention member 51 may be integrated with a member constituting the inside air introduction path 41, as shown in FIG. In this case, the inside air introduction passage 41 and the frame member serving as the foreign matter intrusion prevention member 51 may be integrally molded from synthetic resin.

With this configuration, the function of preventing foreign matter from entering the inside air introduction path 41 can be achieved at the stage when the filter element is attached to the frame member serving as the foreign matter intrusion prevention member 51. That is, the function of preventing foreign matter from entering the inside air introduction path 41 can be easily achieved by simply attaching a filter element to the frame member serving as the foreign matter intrusion prevention member 51, for example.

The preferred embodiments of the present invention have been described above in detail. However, the invention is not limited to the embodiments described above. Various modifications or substitutions may be made to the embodiments described above without departing from the scope of the present invention. Further, features described separately can be combined as long as no technical contradiction occurs.

1...Lower traveling body 2...Swivel mechanism 2M...Travel hydraulic motor 3...Upper rotating body 4...Boom 5...Arm 6...Bucket 7...Boom cylinder 8. ...Arm cylinder 9...Bucket cylinder 10...Cabin 10C...Cover 10D...Door 26...Operation device 26L...Left operation lever 26DL...Left travel lever 26PL...Left Traveling pedal 40... Air conditioning unit 41... Inside air introduction path 41M... Inside air introduction port 42... Outside air introduction path 42M... Outside air introduction port 43... Ventilation duct 43M... Air outlet 50. ...Inside air filter 50F...Filter part 50H...Holder part 51, 51A...Foreign matter intrusion prevention member 52...Outside air filter 100...Shovel AC...Air conditioning system AM...Armrest part AML ...Left armrest BR...Backrest CS...Console CSL...Left console DS...Driver's seat HR...Headrest SF...Support frame SFL...Left support frame SFR・...Right support frame SP...Seating part

Claims (3)

a lower running body;
an upper rotating body rotatably attached to the lower traveling body;
a driver's cab attached to the upper revolving body;
a driver's seat installed in the driver's cab;
an air conditioning unit installed in the driver's cab;
an inside air filter, which is located below the seating area of the driver's seat, and through which inside air supplied to the air conditioning unit passes;
a foreign matter intrusion prevention member coarser than the inside air filter, through which inside air supplied to the air conditioning unit passes;
The foreign matter intrusion prevention member is integrated with a inside air introduction path for taking air inside the driver's cab into the air conditioning unit, which is disposed closer to the air conditioning unit than the support frame of the driver's seat , arranged adjacent to the inside air filter, and configured to cover the same flow path area as that covered by the inside air filter ;
shovel. a lower running body;
an upper rotating body rotatably attached to the lower traveling body;
a driver's cab attached to the upper revolving body;
a driver's seat installed in the driver's cab;
an air conditioning unit installed in the driver's cab;
an inside air filter, which is located below the seating area of the driver's seat, and through which inside air supplied to the air conditioning unit passes;
a foreign matter intrusion prevention member coarser than the inside air filter, through which inside air supplied to the air conditioning unit passes;
The foreign matter intrusion prevention member is a member in which a slit-shaped vent is formed or a member in which a louver-shaped vent is formed, and is formed in the support frame of the driver's seat.
shovel. a lower running body;
an upper rotating body rotatably attached to the lower traveling body;
a driver's cab attached to the upper revolving body;
a driver's seat installed in the driver's cab;
an air conditioning unit installed in the driver's cab;
an inside air filter, which is located below the seating area of the driver's seat, and through which inside air supplied to the air conditioning unit passes;
a foreign matter intrusion prevention member coarser than the inside air filter, through which inside air supplied to the air conditioning unit passes;
The foreign matter intrusion prevention member is formed on the support frame of the driver's seat by punching.
shovel.

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