JP6458573B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine such as a hydraulic excavator, and more particularly to a construction machine in which a handrail is arranged.

  A hydraulic excavator as a construction machine is arranged in a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, an attachment that is mounted in front of the upper revolving body, and an upper revolving body It is roughly constituted by various parts such as a counterweight.

  The attachment is composed of a boom that is mounted so as to be able to be lifted up and down in front of the upper swing body, an arm that is connected to the tip of the boom so as to be vertically rotatable, and a bucket that is attached to the tip of the arm so as to be vertically rotatable. Yes.

  In general, the upper revolving structure is provided with a cab, a fuel tank, a hydraulic oil tank, a machine room, and the like to constitute an airframe. The machine room accommodates various devices such as an engine, a hydraulic pump, a cooling device, and hydraulic equipment. In addition, an openable openable cover that covers the machine room from the outside is provided on the side surface of the machine room, and an openable door is provided in the cab.

  If there is equipment that requires maintenance work, part of the equipment, or other maintenance objects (hereinafter collectively referred to as “maintenance objects”) on the top and side surfaces of the aircraft, The body can be moved by grasping the handrail provided on the side surface, and the maintenance object on the upper part of the aircraft can be reached from the ground.

  For example, if a fuel tank is arranged on the side of the fuselage, a fuel filler is provided on the upper surface of the fuel tank, and the fuel filler is out of reach from the ground, the worker can refuel the fuel tank. When performing, the body is moved up to a height at which the refueling operation can be performed by ascending to a lower traveling body or an elevating step provided in the lower traveling body. Here, when ascending / descending to the lower traveling body or the elevating step provided on the lower traveling body, it is possible to easily ascend / descend by grasping the handrail provided on the side surface of the machine body.

  2. Description of the Related Art Conventionally, there is known a handrail provided on a side surface of a machine room constituting an airframe. (For example, refer to Patent Document 1). Here, since the handrail is exposed to the outside, it can be determined at a glance that there is a handrail on the appearance.

  In addition, there is a machine room that accommodates various devices provided in the upper swing body, and a handrail is provided in the machine room (see, for example, Patent Document 2). Here, an openable / closable side cover that covers the machine room is attached to the outer surface of the machine body, and when using a handrail, the handrail is held and used with the side cover open.

Japanese Patent No. 4865695 JP 2004-190276 A

  By the way, in the construction machine of patent document 1 mentioned above, although the handrail protrudes from the machine body side surface, since it is arrange | positioned avoiding the opening-and-closing locus | trajectory of the side surface cover which opens and closes a machine room, the arrangement position of a handrail is Limited.

  In this way, when the handrail is installed avoiding the opening / closing locus of the side cover, the maintenance object on the upper side and the side of the machine body and the handrail used by the worker to move the body to the maintenance object The position will be separated.

  Further, when a handrail is installed in the machine room as in Patent Document 2, the side cover covering the machine room must be opened each time in order to use the handrail, which takes time.

  An object of the present invention is to install a handrail at an arbitrary position on the side surface of the aircraft and to move the body to the maintenance object on the upper side and the side of the aircraft with an easy posture from the ground. An object of the present invention is to provide a handrail that can be used without worrying about the open / closed state of an openable / closable side cover that is installed around.

The invention described in claim 1 includes an upper swing body supported above the lower traveling body, a side cover that covers the side surface of the upper swing body and that can be opened and closed, and a front side and a back side of the side cover. A through hole, a handrail provided inside the side cover, and a fixing member provided inside the side cover and fixing the handrail, wherein the handrail includes at least a gripping portion In the construction machine in which the fixing part is fixed to the fixing member, an elastic member is attached to the opening part, and the elastic member is provided with a slit through which the grip part can be inserted. In the state where the side cover is closed, the gripping part is inserted through the slit of the elastic member attached to the opening and exposed to the front side of the side cover.

  The invention described in claim 2 is the construction machine according to claim 1, wherein a recess is formed on the front side of the side cover, the opening is provided in the recess, and the side cover is closed. The grip portion is exposed to the front side of the side cover and is accommodated in the recess.

  According to the first aspect of the present invention, the handrail used by the worker to move the body from the ground toward the maintenance target on the upper side and the side of the aircraft to a position where the maintenance work can be performed is an easy posture. And can be installed at any position.

In addition, since the handrail can be gripped with the side cover closed, it can be used without worrying about opening and closing the side cover when an operator uses the handrail. It can be used without worrying about the openable openable open / close cover provided on the side surface of the adjacent airframe or the open / closed state and open / close locus of the cab door. When the side cover is opened and closed, the elastic member is deformed so that the slit is widened and the grip portion can be inserted.When the side cover is closed, the elastic member returns to its original shape and enters the housing chamber from the outside of the opening. Infiltration of rainwater can be prevented.

  According to the invention of claim 2, since the handrail is housed in the recess, it does not get in the way when the worker approaches the handrail.

It is a side view of a hydraulic excavator. It is a top view of the upper revolving body which abbreviate | omitted a part of attachment. It is a perspective view mainly showing the left side of the upper swing body. It is a top view which shows the circumference | surroundings of a side cover. It is a perspective view which shows the state which opened the side cover. It is sectional drawing which looked at the arrangement | positioning relationship of a handrail and a side cover from the arrow AA direction in FIG. It is the perspective view which expanded and looked at the handrail. It is a perspective view of an elastic member.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a hydraulic excavator as a construction machine. The hydraulic excavator 1 includes a self-propelled crawler-type lower traveling body 2 and an upper revolving body mounted on the lower traveling body 2 so as to be able to pivot ( (Corresponding to the airframe of the present invention) 3, an attachment 4 that can be lifted on the front side of the airframe 3, and performs excavation work of earth and sand, and a counterweight 5 disposed on the rear side of the airframe 3. Has been.

  As shown in FIG. 2, the airframe 3 has a base end portion of the attachment 4 attached to the front center portion, a cab 6 is arranged on the left side of the attachment 4, and a fuel tank 7 is arranged behind the cab 6. A tool box 8 in which tools and the like are stored is disposed on the right side of the attachment 4, and a hydraulic oil tank 9 is disposed behind the tool box 8.

  Further, a counterweight 5 is disposed on the rear side of the machine body 3, and various devices such as an engine, a hydraulic pump, a cooling device, and a hydraulic device are disposed between the fuel tank 7, the hydraulic oil tank 9, and the counterweight 5. A machine room 10 in which a class (not shown) is accommodated is arranged.

  As shown in FIG. 3, reference numeral 11 denotes an upper frame that forms a support structure of the machine body 3. On the upper frame 11, the above-described attachment 4, cab 6, fuel tank 7, tool box 8, hydraulic oil tank 9, machine A chamber 10 is arranged.

  The machine room 10 is configured such that the outer surface thereof is covered with a guard cover 20, and a part of the guard cover 20 that constitutes the ceiling part of the machine room 10 is a guard column 16 (shown in FIG. 4) standing from the upper frame 11. ).

  On the side surface of the machine room 10, an openable / closable cover (not shown) that covers the machine room 10 from the outside is provided. The cab 6 is provided with an openable / closable door 6a.

  The upper surface of the fuel tank 7 is provided with a fuel filler port 7a. When refueling the fuel tank 7, an operator moves the lower traveling body 2 or a lifting step (not shown) provided in the lower traveling body 2. ) And move the body from the side of the aircraft to the height where refueling can be performed.

  Here, when the body is moved to a height at which the refueling operation can be performed, the body can be easily moved to a height at which the refueling operation can be performed by gripping the handrail 17 provided on the side surface of the machine body 3.

  4 and 5, a side cover 12 is provided on the side surface of the body of the fuel tank 7, and the side cover 12 constitutes the outer surface of the body and covers the fuel tank 7 so that it can be opened and closed. A storage chamber 13 for storing tools, equipment and the like is formed between the fuel tank 12 and the fuel tank 7.

  The side cover 12 is a hinged door type hinged so as to be openable and closable outward from the side of the machine body 3, and an operator opens the side cover 12 and is stored in the storage chamber 13. , Equipment and so on. The side cover 12 can be opened forward of the machine body, for example, as shown by an opening / closing locus 12c indicated by a chain line in FIG.

  As shown in FIG. 6, the side cover 12 is provided with a recess 15 that is recessed from the front surface 12a to the back surface 12b of the side cover 12 that is the outside of the machine body. The recess 15 has an opening that penetrates the front surface 12a and the back surface 12b. A hole 14 is provided.

  As shown in FIG. 7, the handrail 17 extends from the fixed portion 17c toward the front of the machine body inside the side cover 12, bends toward the outside of the machine body at the bent part 17b, and is gripped by the bent tip. It is comprised so that the part 17a may be formed.

  The gripping portion 17a, the bent portion 17b, and the fixing portion 17c are formed so as to extend continuously, and are formed, for example, by bending a pipe member.

  The fixing portion 17 c is fixed to a guard column 16 as a handrail fixing member disposed on the body 3, and the guard column 16 is erected from the upper frame 11 and installed inside the side cover 12.

  In the closed state of the side cover 12, the gripping part 17 a is exposed from the back surface 12 b side of the side cover 12 through the opening 14 to the front surface 12 a side and is accommodated in the recess 15.

  According to the above-described configuration, the handrail 17 does not interfere regardless of the opening / closing track 12c of the side cover 12, so that the worker can easily reach the height of the maintenance object to be refueled from the ground. The handrail 17 can be installed at an arbitrary position of the side cover 12 capable of moving.

  Furthermore, since the gripping portion 17a of the handrail 17 can be gripped with the side cover 12 closed, the operator can use the handrail 17 without worrying about the open / closed state of the side cover 12. Further, it can be used without worrying about the open / close state and open / close locus of the cab door 6a, and the open / close cover that is provided on the side surface of the body and is adjacent to the side cover 12 in the longitudinal direction of the body.

  In addition, since the gripping portion 17a constituting the handrail 17 is exposed to the outside of the machine body with the side cover 12 closed, the operator can determine that there is a handrail, and from the arrangement of the handrail, the maintenance can be performed. It can be recognized at a glance that it is a handrail for moving the body to the object.

  As shown in FIG. 6, the grip portion 17 a is configured to be accommodated in the recess 15 when the side cover 12 is closed. Thus, the handrail 17 does not get in the way when an operator or an object other than an operator approaches the handrail 17.

  In addition, the elastic member 19 provided with the slit 19a shown in FIG. When the side cover 12 is opened and closed, the elastic member 19 in contact with the gripping portion 17a is deformed and the slit 19a is widened, so that the gripping portion 17a can be inserted. When the side cover 12 is in the closed state, the elastic member 19 returns to its original shape, and rain water or the like can be prevented from entering the storage chamber 13 from the outside of the opening 14 of the side cover 12.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can take other configurations.

  For example, the bent portion 17b of the handrail 17 may have a gently curved shape other than the bent shape. Further, when the guard column 16 is arranged close to the opening portion 14 of the side cover 12, the handrail 17 extends from the fixing portion 17c to form the gripping portion 17a, and the bent portion 17b is not provided. Good.

1 Construction machine (hydraulic excavator)
3 Upper swing body (airframe)
4 Attachment 5 Counterweight 6 Cab 6a Cab door 7 Fuel tank 7a Refueling port 10 Machine room 11 Upper frame 12 Side cover 12a Side cover surface 12b Side cover back surface 12c Side cover opening / closing locus 13 Housing chamber 14 Opening 15 Concave portion 16 Guard pillar 17 Handrail 17a Grasping portion 17b Bending portion 17c Fixing portion 19 Elastic member 19a Slit 20 Guard cover

Claims (2)

An upper swing body supported above the lower traveling body, a side cover that covers the side surface of the upper swing body and that can be opened and closed, an opening that penetrates the front side and the back side of the side cover, and the side cover A handrail provided inside the side cover, and a fixing member that fixes the handrail. The handrail is formed of at least a gripping part and a fixing part, and the fixing part In the construction machine fixed to the fixing member,
An elastic member is attached to the opening portion, the elastic member is provided with a slit through which the holding portion can be inserted , and the holding portion is attached to the opening portion with the side cover closed. A construction machine configured to be inserted through the slit of the elastic member and exposed to the front side of the side cover. In the state where a recess is formed on the front side of the side cover, the opening is provided in the recess, and the side cover is closed,
The construction machine according to claim 1, wherein the grip portion is exposed to the front side of the side cover and is accommodated in the recess.

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