JP5720717B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine such as a large-sized hydraulic excavator or a dismantling machine including the excavator as a base.

  Construction machines such as hydraulic excavators are mounted on a crawler-type lower traveling body so that the upper swinging body can swing freely around an axis perpendicular to the ground, and excavation and dismantling work is performed at the front center of the upper swinging body. A front attachment for performing the above, a cabin on the left side of the front part, and a counterweight on the rear end part, respectively.

  In this specification, “front and rear” and “left and right” refer to directions when the front attachment side is the front.

  The upper swing body is provided with an engine room at the rear and in front of the counterweight where the engine and related equipment (heat exchanger, cooling fan, etc.) are installed. In this device accommodating portion, valves and tanks are covered with a cover material or exposed.

  In such construction machines, particularly large construction machines, in order to facilitate maintenance of the equipment installed in the engine room and equipment housing section, as shown in Patent Documents 1 and 2, the engine room and equipment housing A maintenance passage that extends in the left-right direction between the two is known.

  This maintenance passage is formed as a groove-like passage by the side walls on the front and rear sides and the rear side of the passage and the bottom plate (floor plate).

  On the other hand, in a large construction machine, it is necessary to remove the front attachment and the counterweight from the upper swing body in order to meet the weight limit during transportation.

  Therefore, it is desirable to provide an access passage on the upper surface on at least one of the left and right sides of the upper swing body separately from the maintenance passage so that the worker can easily access the attachment / detachment portion of the front attachment and the counterweight.

  This access passage is preferably provided over a certain length range in the front-rear direction from the front end portion of the upper swing body provided with the lift opening to the front of the counterweight.

  As a passage similar to this access passage, Patent Document 3 discloses a passage provided as an approach passage to the maintenance passage in the front-rear direction over a range from the front end portion to the entrance and exit of the maintenance passage.

JP 2004-270268 A Japanese Patent Laid-Open No. 2002-88818 JP 2010-47975 A

  When both maintenance and access passages are provided as described above, the maintenance passages are provided in the left-right direction and the access passages are provided in the front-rear direction, so that both passages intersect at the entrance / exit portion of the maintenance passage.

  Here, the maintenance passage is desirably provided at a relatively low position in accordance with the installation level of the maintenance target device such as the engine. On the other hand, the access passage is preferably provided at a higher position than the maintenance passage because an operator needs to go up to a high place, particularly on the upper surface of the counterweight.

  That is, both the passages are provided with a step so that they intersect as described above and the access passage is at a high level.

  When this passage configuration is adopted, in order to ensure the continuity of the access passage, it is necessary to provide a cover member serving as a floor plate of the access passage at the intersection.

  Since this cover member is provided in a state in which the maintenance passage is covered from above at the intersection, the effective height of the maintenance passage is too low in this state, and the worker cannot actually pass. For this reason, it is necessary to remove this cover member from the crossing part at the time of maintenance.

  However, when the cover member is removed, the access passage is divided at the intersection, so that it is necessary to ensure safety by stopping the passage of another worker.

  As a countermeasure against this point, a dedicated circuit breaker for blocking traffic is placed in front of the intersection (usually the front of the intersection because the elevator is at the front end) so that the access passage cannot be passed in the above state. However, it is not a good idea because this circuit breaker is prepared and it takes time to install / remove / store according to the situation and it takes time to install / remove.

  Therefore, the present invention, on the premise of a passage configuration that crosses both maintenance and access passages at the entrance and exit side of the maintenance passage, and has a step, can block the passage of the access passage divided at the intersection during maintenance, In addition, a construction machine is provided that can perform this blocking by a passage component.

  As means for solving the above problems, the present invention has all the following requirements (A) to (G).

  (A) An upper swing body is rotatably mounted on the lower traveling body, and the upper swing body is a maintenance path extending in the left-right direction for performing maintenance of equipment such as an engine as a path for an operator, Having an access passage extending in the front-rear direction for an operator to move in the front-rear direction on at least one side of the upper swing body.

  (B) The maintenance passage must have an entrance for workers to enter and exit at one end.

  (C) The maintenance and the access passage intersect at the end of the maintenance passage on the entrance and exit side, and are provided with a step so that the access passage becomes higher.

  (D) A maintenance passage so as not to obstruct the passage of the maintenance passage and a first position as a floor plate connected to the access passage in a state of covering the maintenance passage from above with an intersection cover member at the intersection of the two passages Provided so as to be movable between the second position deviated from above.

  (E) A guard rail, which is a protective fence for preventing falling, is provided along the access path at the outer edge of the access path.

  (F) An intersection guard member serving as a protective fence for the intersection is provided on the outer edge of the intersection.

  (G) Regarding at least one of the intersection cover member and the intersection guard member, the second position is different from the first position in the case of the intersection cover member, and different from the first position serving as a protective fence in the case of the intersection guard member. As the second position, the access passage has a position where the access passage is blocked in front of the intersection, and is configured as a dual-purpose member that can be rotated between the first position and the second position. .

  According to this configuration, when the access passage is used, the intersection cover member serves as a floor plate of the access passage at the intersection, and the continuity of the access passage is ensured.

  On the other hand, at the time of maintenance (when the maintenance passage is used), the intersection cover member moves to the second position where it is removed from above the passage so as not to obstruct the passage of the maintenance passage. Become.

  Then, in a state in which the intersection cover member is moved to the second position, that is, in a state in which the floor board at the intersection portion of the access passage is eliminated, the access passage is at the intersection portion by at least one of the cover member and the intersection guard member. Since it is shut off in front, it is possible to ensure the safety of workers trying to pass through the access passage.

  Moreover, since the above-mentioned interruption can be performed by a passage component member (also used as an intersection cover member or an intersection guard member), it is necessary to prepare another dedicated breaker, and this breaker is installed / removed and stored. There is no need to do extra work. In addition, blocking / unblocking can be performed quickly.

  In the present invention, the intersection guard member is used as the dual-purpose member, and the first position located above the entrance and entrance alongside the guard rail of the access passage, and the space above the entrance and exit is widened and the space above the entrance and exit is expanded. It is desirable that the access passage is provided so as to be rotatable between a second position where the access passage is blocked (Claim 2).

  According to this configuration, since the upper space of the entrance / exit can be expanded in a state where the crossing guard member is moved to the second position (blocking position), the crossing guard member when the worker enters and exits the maintenance passage. You don't have to worry about hitting your head, and you don't have to be extremely bent forward to avoid this, making it easier to get in and out.

  In the present invention, it is desirable that the deck is provided in the front-rear direction on the outer surface of the upper swing body on the side where the entrance / exit of the maintenance passage is provided, so as to be an entrance path to the maintenance passage.

  According to this configuration, it is possible to easily and safely enter and exit the maintenance passage using the deck.

  In the present invention, a non-intersection cover member that covers the maintenance path from above other than the intersection is provided above the maintenance path, and the non-intersection cover member and the intersection cover at the first position are provided. It is desirable that the maintenance passage is configured as an air passage that is closed at the entire length by the member (claim 4).

  In this way, if the maintenance passage is configured to be an air passage except during maintenance, the passage can be effectively used as a passage for cooling air (exhaust or intake air) passed through the heat exchanger in the engine room, It becomes possible to increase the cooling efficiency of the heat exchanger.

  According to the present invention, on the premise of a passage configuration in which both maintenance and access passages intersect at the entrance and exit side of the maintenance passage and have a step, it is possible to block the access passage that is divided at the intersection during maintenance, In addition, this blocking can be performed by the passage component member.

It is a schematic side view of the whole base machine of the construction machine which concerns on embodiment of this invention. FIG. 3 is a plan view when the maintenance passage is not used. It is a top view at the time of a maintenance passage use same as the above. It is the IV-IV line expanded sectional view of FIG. It is a partially expanded side view when a maintenance passage is not used. FIG. 6 is a view corresponding to FIG. 5 when the maintenance passage is used. FIG. 6 is a partial perspective view of the base machine in the state shown in FIGS. It is a fragmentary perspective view of the state of FIG.

  1 to 3 show a base machine of a construction machine according to an embodiment.

  This base machine is configured such that an upper swing body 2 is mounted on a crawler type lower traveling body 1 so as to be rotatable around an axis O perpendicular to the ground, and is not shown in the center of the front portion of the upper swing body 2. A work front attachment is mounted so that it can be raised and lowered, and a cabin 3 is mounted on the left side of the front and a counterweight 4 is mounted on the rear end.

  In addition, an engine room 5 in which an engine (not shown) and related equipment (a heat exchanger, a cooling fan, etc.) are installed is provided at the rear of the upper swing body 2 (in front of the counterweight 4). A device accommodating portion 6 is provided, and valves, tanks and other devices are covered with the cover material or exposed in the device accommodating portion 6.

  In the figure, the engine room 5 and the device accommodating portion 6 are shown as simple sections, and illustrations of the accommodated devices and the like are omitted.

  A maintenance passage 7 (shown with a slanting line on the left in FIG. 3) extending in the left-right direction is provided between the engine room 5 and the equipment housing portion 6 in the upper swing body 2, and an operator can perform this maintenance. Entering the passage 7, the maintenance target devices installed on both sides along the passage 7 can be maintained.

  The maintenance passage 7 is formed as a concave groove-like passage provided with an inlet / outlet 8 that opens to the outside on one end side, with each side wall on the front and rear sides and on the back side of the passage (reference number omitted) and having the other end abutted. In addition, it is possible to enter and exit through a deck 9 (sometimes referred to as a catwalk) which is a working scaffold provided projecting outward on the left outer surface of the upper swing body.

  In addition, an entrance / exit door 10 with a ventilation opening is provided at the entrance / exit 8 so as to be openable / closable between a closed position and an open position opened outward with the rear side (counter weight 4 side) as a fulcrum.

  Since there is a step between the maintenance passage 7 and the deck 9, the end of the maintenance passage 7 on the entrance / exit side is formed in a staircase shape (see FIGS. 4 and 6).

  As shown in FIGS. 2 to 4, the deck 9 is also provided on the right outer side surface.

  On the other hand, in order to allow the worker to easily access the attachment / detachment portion of the front attachment and the counterweight 4, separately from the maintenance passage 7, an access passage 11 (lower right in FIGS. (Shown with diagonal lines).

  The access passage 11 is provided over almost the entire length of the upper swing body 2 from the front end portion where the lift opening is provided to the front of the counterweight 4.

  Here, since the maintenance passage 7 extends in the left-right direction and the access passage 11 extends in the front-rear direction, both passages 7 and 11 are provided in a state of intersecting at the entrance / exit 8 side of the maintenance passage 7.

  Further, as described above, the maintenance passage 7 is provided at a relatively low position in accordance with the installation level of the maintenance target equipment such as the engine, while the access passage 11 is provided at a high position, particularly on the upper surface of the counterweight 4. It is provided at a higher position than the maintenance passage 7 because it needs to be raised.

  That is, both the passages 7 and 11 intersect with each other as described above, and are provided with a step so that the access passage 11 becomes higher.

  In this passage configuration, in order to ensure the continuity of the access passage 11, an intersection cover member 12 serving as a floor plate of the access passage 11 is provided at the intersection.

  The intersection cover member 12 is provided so as to cover the maintenance passage 7 from the top at the height of the access passage 11 at the intersection.

  In addition, a non-intersection cover member 13 is provided at the same height as the intersection cover member 12 in other portions of the maintenance passage 7, and the maintenance path 7 is formed by both the intersection and non-intersection cover members 12 and 13. However, the upper part is closed at the full length except during maintenance.

  That is, the maintenance passage 7 is a closed passage in which the upper and lower sides and the upper and lower four sides are closed except during the maintenance, and the cooling passage (exhaust or exhaust) passing through the heat passage in the engine room 5 is passed through the maintenance passage 7 as the closed passage. It is configured to function as a passage for intake.

  Here, the cover members 12 and 13 for both the crossing portion and the non-crossing portion are provided at the height level of the access passage 11 as described above, and the difference in height between the access passage 11 and the maintenance passage 7 is greater than the height of the person. Since it is small, the effective height of the maintenance passage 7 becomes too low in this state, and the worker cannot actually pass through.

  Accordingly, the cover members 12 and 13 have a first position that covers the maintenance passage above in a horizontal posture with the front end side (horizontal axis in the left-right direction) as the center, and a second position that rises perpendicularly to the front side and opens above the passage. It is attached so that it can be rotated (opened / closed) freely.

  Thus, at the time of maintenance, as shown in FIGS. 3, 4 and 6, both cover members 12 and 13 are opened so that an operator can stand up and pass through the maintenance passage 7.

  On the other hand, a guard rail 14, which is a protective fence for preventing falling, is provided on the outer edge of the access passage 11 over the entire length of the passage 11.

  In addition, an intersection guard member 15 serving as a protection fence for the intersection is provided side by side with the rail 14 so that continuity with the guard rail 14 is maintained at the intersection of the passages 7 and 11.

  The crossing guard member 15 may have a panel shape as illustrated, or may be formed by combining pipes in the same manner as the guard rail 14.

  Here, since the intersection guard member 15 is located above (substantially directly above) the entrance / exit 8 of the maintenance passage 7, the effective height of the entrance / exit 8 is lowered as it is, and the guard member 15 is used when an operator enters and exits. There is a risk of hitting 15 head. Or in order to avoid this, it is necessary for an operator to bend forward extremely, and in any case, the access to the maintenance passage 7 is hindered.

  Therefore, the intersection guard member 15 has a first position that is above the doorway and performs a protective fence function with the front end side (vertical axis) as the center, and an inner side (maintenance passage 7 side) from the first position. It is attached to be displaceable between the second position along the front side wall of the maintenance passage 7 by rotating 90 degrees.

  Thereby, since the upper space of the entrance / exit 8 can be expanded in the state which moved the crossing part guard member 15 to the 2nd position, when an operator goes in and out of the maintenance channel | path 7, a head is put on the crossing guard member 15 There is no risk of bumping, and it is not necessary to bend forward to avoid this, making it easier to get in and out.

  Both the cover members 12 and 13 and the crossing guard member 15 are held at the first and second positions by a known holding mechanism (not shown), respectively.

  1 to 4, 7, and 8, a weight guard rail 16 is provided on the outer edge of the counterweight 4. Further, guard rails are also provided on the outer edges of the side decks 9, 9, but are not shown here.

  The crossing cover member 12 and the crossing guard member 15 cross the upper space of the access passage 11 like a double front and rear wall in front of the crossing portion (front side) in the second position, and the passage 11 cannot pass therethrough. It will be in the state where it was cut off.

  In other words, the mounting positions, dimensions, and the like of both members 12 and 15 are set so that this blocking state is obtained.

  Thus, the cover member 12 and the intersection guard member are moved in a state where the intersection cover member 12 is moved to the second position, that is, in a state where the floor plate at the intersection of the access passage 11 disappears and the passage 11 is divided. By blocking the access passage 11 before the intersection by 15, when an access worker different from the maintenance worker tries to pass through the access passage 11 during maintenance, the access worker is prevented from passing. Can be secured.

  As described above, according to this construction machine, when the access passage 11 is used, the intersection cover member 12 becomes a floor plate of the access passage at the intersection, and the continuity of the access passage 11 can be ensured.

  On the other hand, at the time of maintenance (when the maintenance passage is used), the intersection cover member 12 and the non-intersection cover member 13 are moved to the second position where they are removed from above the passage 12 so as not to obstruct the passage of the maintenance passage 7. By moving, the passage of the maintenance passage 7 and the maintenance work can be facilitated.

  Then, in a state where the intersection cover member 12 is moved to the second position, that is, in a state where the access passage 11 is divided at the intersection portion, the access passage 11 is made to cross the intersection portion by the cover member 12 and the intersection guard member 15. Since it is shut off in front, it is possible to ensure the safety of workers who are going through the access passage 11 during maintenance.

  In this case, since the intersection cover member 12 and the intersection guard member 15 overlap each other to form a double circuit breaker, the interruption effect is further enhanced.

  In addition, since the above-described interruption can be performed by the passage component members of the intersection cover member 12 and the intersection guard member 15, that is, in order to use both members 12 and 15 as a breaker, another dedicated breaker is prepared. There is no need to install or remove and store the circuit breaker. Also, the blocking / unblocking can be quickly performed by turning both members 12 and 15.

  In addition, according to this construction machine, the following effects can be obtained.

  (i) Since the space above the entrance / exit 8 of the maintenance passage 7 can be expanded in a state where the crossing guard member 15 is moved to the second position (blocking position), when an operator enters and exits the maintenance passage 7 The possibility of hitting the head against the crossing guard member 15 is also eliminated, and it is not necessary to bend forward extremely in order to avoid this.

  (ii) The maintenance deck 7 can be easily and safely accessed using the left deck 9.

  (iii) The maintenance passage 7 is a closed passage that is closed on all four sides except during maintenance, and the passage 7 can be used as an exhaust or intake passage (air passage) for cooling the heat exchanger. Efficiency can be increased.

Other embodiments
(1) In the above embodiment, the crossing cover member 12 and the crossing guard member 15 are both positioned on the front side of the crossing portion at the second position and function as a circuit breaker. , 15 may be divided into the front side and the rear side of the intersection so that the circuit breaker function is exhibited on both the front and rear sides.

  By doing so, safety can be ensured not only when the access worker heads from the front to the rear (counterweight 4 side) but also vice versa.

  (2) Only one of the intersection cover member 12 and the intersection guard member 15 may be used as a circuit breaker.

  For example, only the intersection cover member 12 may be used as a circuit breaker, and the intersection guard member 15 may be opened outward as the second position during maintenance.

  Alternatively, only the intersection guard member 15 may be used as a circuit breaker, and the intersection cover member 12 may be configured to rotate vertically downward as the second position, or to be slid forward or rearward.

  (3) In the above-described embodiment, the maintenance passage 7 is formed as a non-penetrating passage where the opposite side to the entrance / exit 8 is abutted. However, the passage 7 may be formed as a through passage provided with an entrance on both sides.

  In this case, the access passage 11 may also be provided on both the left and right sides so that the passages 7 and 11 intersect on both the left and right sides, and the configuration of the above embodiment or the other embodiments may be adopted for the both side intersection.

  (4) In the embodiment described above, the maintenance passage 7 is configured to go in and out through the deck 9, but another route such as a ladder provided on the outer surface of the upper swing body 2 may be used.

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper turning body 5 Engine room 6 Equipment accommodating part 7 Maintenance passage 9 Deck 10 Entrance door 11 Access passage 12 Intersection cover member 13 Non-intersection cover member 14 Guard rail 15 Intersection guard member

Claims (4)

A construction machine characterized by having all the following requirements (A) to (G):
(A) An upper swing body is rotatably mounted on the lower traveling body, and the upper swing body is a maintenance path extending in the left-right direction for performing maintenance of equipment such as an engine as a path for an operator, Having an access passage extending in the front-rear direction for an operator to move in the front-rear direction on at least one side of the upper swing body.
(B) The maintenance passage must have an entrance for workers to enter and exit at one end.
(C) The maintenance and the access passage intersect at the end of the maintenance passage on the entrance and exit side, and are provided with a step so that the access passage becomes higher.
(D) A crossover cover member at the intersection of the two passages, and the first position serving as a floor plate at the intersection of the access passage in a state of covering the maintenance passage from above, so as not to obstruct the passage of the maintenance passage. And provided so as to be movable between the second position deviating from above the maintenance passage.
(E) A guard rail, which is a protective fence for preventing falling, is provided along the access path at the outer edge of the access path.
(F) An intersection guard member serving as a protective fence for the intersection is provided on the outer edge of the intersection.
(G) Regarding at least one of the intersection cover member and the intersection guard member, the second position is different from the first position in the case of the intersection cover member, and different from the first position serving as a protective fence in the case of the intersection guard member. As the second position, the access passage has a position where the access passage is blocked in front of the intersection, and is configured as a dual-purpose member that can be rotated between the first position and the second position. .   The intersection guard member is used as the dual-purpose member, the first position located above the entrance and entrance alongside the guard rail of the access passage, and the space above the entrance and exit is widened and the access passage is expanded. The construction machine according to claim 1, wherein the construction machine is provided so as to be rotatable with respect to the second position to be blocked.   The construction machine according to claim 1 or 2, wherein a deck is provided in the front-rear direction on the outer surface of the upper swing body on the side where the entrance / exit of the maintenance passage is provided so as to be an entrance path to the maintenance passage. .   A non-intersection cover member that covers the maintenance path from above except for the intersection is provided above the maintenance path, and the maintenance path is constituted by the non-intersection cover member and the intersection cover member at the first position. The construction machine according to any one of claims 1 to 3, wherein the construction machine is configured as an air passage whose upper part is closed at a full length portion.

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