JP2010185216A - Hood cover structure of revolving working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hood cover structure of a revolving working machine capable of positioning an intermediate cover while allowing a worker to confirm its position visually and tightening the intermediate cover at a position where it is concealed by the openable and closable equipment cover and a hood. <P>SOLUTION: The hood cover structure of the revolving working machine has a support frame 5 having a pair of right and left rear legs 5a, 5b behind an engine 3 in a rear part of a revolving frame 2, the rear hood 6 supported pivotally to the support frame 5 and covering the right and left rear legs 5a, 5b from behind, the right and left intermediate covers 7a, 7b for the rear hood 6, the equipment cover 9 provided above and in front of the intermediate cover 7b at one side among the right and left intermediate covers, and a revolving cover 10b below the equipment cover 9 and the intermediate cover 7b at one side. The intermediate cover 7b at one side has a rear mounting part 11b attached to the rear leg 5b, a locking means 13 locked at an upper end 12b of the revolving cover 10b, and a stay 14 at an upper part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bonnet cover structure for a turning work machine.

Conventionally, a swivel working machine such as a backhoe provided with a bonnet that covers various devices such as an engine and a fuel tank mounted on a swivel is known.
In this turning work machine, the bonnet has a bonnet front wall part and a pair of left and right bonnet side wall parts, and is provided with a pair of left and right protectors also serving as weights behind the left and right side parts of the bonnet. The bonnet side wall is disposed between the bonnet front wall and the left and right protectors, and is engaged by engaging an engaging member provided on the outside of the bonnet side wall with an engaging member provided on the inside of the protector. Then, it is fastened and fixed to the left and right outer portions of the bonnet front wall by a fastener such as a bolt (see Patent Document 1).

JP 2003-184833 A

In the conventional turning work machine, the engaging member of the bonnet side wall and the locking member of the protector are hidden by the protector, and the bonnet side wall is positioned while visually confirming the engagement between the engaging member and the locking member. It has become difficult. Moreover, the fastener of a bonnet side wall part is exposed and there exists a possibility that it may loosen loosely unwillingly.
In view of the above, the present invention is directed to a bonnet for a swivel work machine in which the intermediate cover is positioned while being visually recognized, and the intermediate cover can be fastened at a position hidden by the openable / closable equipment cover and the openable / closable bonnet. -To provide a cover structure.

In order to achieve the above object, the present invention employs the following technical means.
First, the engine 3 and the counterweight 4 are arranged at the rear part of the swivel base 2, and a pair of left and right rear leg parts 5a and 5b on the rear side of the engine 3 and the upper parts of the left and right rear leg parts 5a and 5b are A support frame 5 having an upper frame 5c connected to the upper side of the engine 3; a rear bonnet 6 supported by the support frame 5 so as to be freely opened and closed and covering the engine 3 and the left and right rear leg portions 5a and 5b from the rear; Thereafter, the intermediate covers 7a and 7b disposed on the left and right of the bonnet 6, the device cover 9 disposed on the front of one of the left and right intermediate covers 7b to cover the device 8, the device cover 9 and the above-mentioned There is a swivel cover 10b disposed below the one intermediate cover 7b and on the front side of the swivel base 2. The one intermediate cover 7b has a rear leg portion of the support frame 5 at the rear. b is provided with a rear mounting portion 11b which is covered with the rear bonnet 6, and the front lower portion is provided with a locking means 13 which is placed on the upper end portion 12b of the swivel cover 10b and performs horizontal positioning. And a stay 14 fixed to the swivel base 2 at a position hidden by the device cover 9.

Secondly, the device cover 9 includes an upper wall body 15 extending from the front surface to the upper surface, and a side wall body 16 provided on a side edge of the upper wall body 15, and a front lower end of the upper wall body 15 is It is pivotally supported on the swivel base 2 via a horizontal shaft 17 so that the rear portion of the upper wall body 15 protrudes rearward from the front end of the one intermediate cover 7b and covers the stay 14. The lower part of the body 16 is provided with the engaging means 18 which is mounted on the upper end part 12b of the revolving cover 10b and performs positioning in the horizontal direction.
Thirdly, the rear edge of the device cover 9 is provided with a grip portion 19 for gripping when opened and closed, and a recess 20 for gripping the grip portion 19 is provided on the upper portion of the one intermediate cover 7b. It is characterized by being.

  Fourth, an engine room 22, a radiator room 23, and an equipment room 24 are continuously formed around the driver's seat 21 mounted on the swivel base 2, and the engine room 22 can be opened and closed by the opening / closing bonnet 6. A support frame 5 that pivotally supports the open / close bonnet 6 and straddles the engine 3 in the engine room 22, a removable intermediate cover 7 b that covers the radiator room 23, and an openable / closable equipment cover that covers the equipment room 24. 9 and a swivel cover 10b disposed on the side of the swivel base 2 below the device cover 9 and the intermediate cover 7b, and the intermediate cover 7b is connected to the support frame on one side. An attachment portion 11b attached to the leg portion 5b located on the outer peripheral side of the swivel base 2 among the five leg portions and covered with the opening / closing bonnet 6 is provided. The other lower part is provided with a locking means 13 which is placed on the upper end part 12b of the swivel cover 10b and performs horizontal positioning, and is further fixed to the swivel base 2 at a position hidden by the equipment cover 9 at the upper part. It is characterized by having a stay 14.

Accordingly, one intermediate cover 7b includes a rear mounting portion 11b that is attached to the rear leg portion 5b whose rear portion is hidden by the rear bonnet 6, and a stay 14 that is fixed to the swivel base 2 at a position hidden by the device cover 9. The intermediate cover 7b can be prevented from unintentional loosening by hiding the fasteners of the intermediate cover 7b, and provided with a locking means 13 that locks and positions the upper end 12b of the swivel cover 10b. The intermediate cover 7b can be attached while visually recognizing the attachment position.
The device cover 9 includes an upper wall body 15 and a side wall body 16. The upper wall body 15 has a front lower end pivotally supported by the swivel base 2 so as to be openable and closable, and a rear portion from the front end of one intermediate cover 7b. Further, by projecting rearward and covering the stay 14, the fasteners of the intermediate cover 7b can be concealed and unintentional loosening can be prevented, and the side wall body 16 is positioned by engaging with the upper end portion 12b of the swivel cover 10b. By providing the engaging means 18 that performs the above operation, the device cover 9 can be opened and closed while visually recognizing the horizontal position.

Furthermore, by providing the upper part of one intermediate cover 7b with the dent 20 for gripping the grip part 19 of the device cover 9, it is easy to put the hand into the dent 20 and grip the grip part 19 and open and close the device cover 9. Becomes easy.
In addition, positioning can be performed when the intermediate cover 7 b is attached while visually recognizing, and the intermediate cover 7 b can be fastened at a position hidden by the openable / closable device cover 9 and the open / close bonnet 6.

  According to the present invention, the intermediate cover can be positioned while being visually recognized, and the intermediate cover can be fastened at a position hidden by the openable / closable device cover and the open / close bonnet.

The top view of the bonnet cover structure body of the turning working machine which concerns on this invention. The side view of a bonnet cover structure. The front view of a bonnet cover structure. The top view of the principal part of a bonnet cover structure. The side view of the principal part of a bonnet cover structure. The front view of the principal part of a bonnet cover structure. The perspective view of the latching means of an intermediate | middle cover, and the engagement means of an apparatus cover. The perspective view of a stay inside an intermediate | middle cover. The perspective view of the upper right side of a bonnet cover structure. The whole side view of a turning work machine.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 10 show an ultra-small turning type turning work machine 31 provided with a bonnet cover structure 1 according to an embodiment of the present invention.
The turning work machine 31 includes a lower traveling device 32 constituted by a crawler type traveling device, an upper turning body 33, and an excavating device 36 for performing excavation work.
The swivel body 33 includes a swivel base 2 supported on a traveling device 32 via a swivel bearing 34 so as to be pivotable about a swivel axis X in the vertical direction, an engine 3 provided on the swivel base 2, and a driver's seat 21. A drilling device 36, a fuel tank 37, a hydraulic oil tank 38, and the like.

The driver's seat 21 is disposed in the vicinity of the left side of the turning axis X, and a traveling device control lever 39 for operating the traveling device 32 is provided in front of the driver's seat 21. Excavator operation levers 40 for operating the excavator 36 are disposed on the left and right sides of the driver seat 21.
The swivel base 2 includes a swivel frame 41 serving as a skeleton, a counterweight 4 that is attached to the rear end side of the swivel frame 41 to form a rear portion of the swivel base 2 and balances the weight with the excavator 36, The main structure is provided with swivel covers 10 a, 10 b and the like attached to the left and right front side surfaces of the frame 41.

The swivel frame 41 has a swivel board 43 made of a thick plate that constitutes the bottom of the swivel base 2. The swivel frame 41 is located on the right side of the swivel board 43 at a position near the center in the left-right direction. A pair of left and right vertical ribs 44 extending to the left and right vertical ribs 44 are provided, and a boom mounting portion 46 is provided between the left and right vertical ribs 44 so that the base (lower part) of the boom 45 of the excavator 36 is swingably mounted about the left and right axes. Yes.
A left intermediate cover 7a, which will be described later, is disposed above the left end portion of the counterweight 4, and a right intermediate portion, which will be described later, extends from above the right end portion of the counterweight 4 to above the rear portion of the upper end portion 12b of the right turning cover 10b. A cover 7b is arranged.

Mounted on the upper surface of the swivel base 2 are an engine 3, a radiator 47, tanks such as a fuel tank 37 and a hydraulic oil tank 38, a control valve 48, and a battery 49. On the swivel base 2, an engine room 22 that covers the engine 3 disposed behind the driver seat 21 is formed, and a fuel tank 37 is disposed below the driver seat 21. An equipment room 24 is formed on the right side of the driver's seat 21, and a hydraulic oil tank 38, a control valve 48, a battery 49, and the like are arranged in the equipment room 24.
A radiator room 23 is formed between the engine room 22 and the equipment room 24, that is, on the right side of the engine room 22 and behind the equipment room 24. A radiator 47 is provided on the right side of the engine 3 in the radiator room 23. Between the engine 3 and the radiator 47, outside air is taken into the radiator room 23 and passes through the radiator 47, and then into the engine room 22. A leading cooling fan 55 and a fan shroud 57 are provided. Further, a multiple hydraulic pump 56 is provided on the left side of the engine 3 so as to be driven.

Therefore, the engine room 22, the radiator room 23, and the equipment room 24 are continuously formed around the driver's seat 21.
The engine room 22, the radiator room 23, and the equipment room 24 are covered with a hood cover structure 1, and the hood cover structure 1 is supported by a support frame 5, a turning second structure, and the like. .
The support frame 5 is formed of a plate material or a pipe material as shown in FIGS. 1 to 3, and includes a pair of left and right rear leg portions 5 a and 5 b, a pair of left and right front leg portions 5 d and 5 e, and these front and rear leg portions 5 a, And an upper frame 5c that connects the upper portions of 5b, 5d, and 5e above the engine 3.

Further, the support frame 5 has a four-column frame shape with the leg portions 5a, 5b, 5d and 5e on the front, rear, left and right so as to straddle the engine 3. In particular, the left and right rear leg portions 5a and 5b 2 is set up substantially vertically. Thereby, the useless space behind the engine 3 can be reduced, and the length of the support frame 5 in the front-rear direction can be shortened as much as possible.
Of the legs 5a, 5b, 5d and 5e of the support frame 5, the leg located on the outer periphery side of the swivel base 2 is the left rear leg 5a or the right rear leg 5b, and the legs 5a and 5b. The outer surface of the leg portion located on the outer periphery side of the swivel base 2 among 5d and 5e is the rear surface 60a of the left rear leg portion 5a or the rear surface 60b of the right rear leg portion 5b.

As shown in FIGS. 1 to 3, the bonnet cover structure 1 is made of sheet metal or hard resin, and an openable rear bonnet (open / close bonnet) 6 disposed behind the engine 3, Middle covers 7 a and 7 b disposed on the left and right of the rear bonnet 6, a device cover 9 disposed on the front side of the right middle cover 7 b and covering the device 8, and a front upper bonnet 52 covering the front upper side of the engine 3 It consists mainly of:
The rear bonnet 6 has an arc shape as a whole in a plan view, and has a shape in which a midway portion in the vertical direction bulges rearward in a side view. Further, the rear bonnet 6 has an inner surface at the front upper portion thereof pivotally supported on the lower surface of the upper frame 5c of the support frame 5 via the horizontal axis of the pivotal support so as to be swingable. Covering. In other words, the engine room 22 can be opened from the rear by swinging the rear bonnet 6 around the horizontal axis and opening it upward. Further, a locking tool 58 that locks the closed state with the locking tool of the counterweight 4 is provided at the rear lower part of the inner surface of the rear bonnet 6.

As shown in FIGS. 1 to 6, the left and right intermediate covers 7 a and 7 b are formed in an arc shape substantially concentric with the rear bonnet 6 in plan view.
The left intermediate cover 7 a is provided so as to cover the left side of the engine 3 along the outer periphery of the turntable 2 from the left side of the rear bonnet 6 to the left outer side of the driver seat 21.
The left intermediate cover 7a is placed on the upper surface of the fuel tank 37 in which the left front end is located inside the bonnet cover structure 1 with the left front end placed on the left end of the counterweight 4 and the upper end 12a of the left turning cover 10a. The rear right end portion (rear attachment portion 11a or attachment portion 11a) is attached to the rear surface 60a of the left rear leg portion 5a with a screw or the like.

The counterweight 4 is made of a casting, and, as shown in FIGS. 1 to 3, 10, the outer circumference of the swivel base 2 extends from the rear end of the swivel base 2 to the left and right outward extension of the rear part of the driver seat 21. Along the whole, a substantially arc shape with the turning axis X as the center of curvature is formed. Further, the counterweight 4 has a shape in which the central portion in the left-right direction extends along the lower end portion of the rear bonnet 6, and there is an obstacle to the placement of the left and right intermediate covers 7 a and 7 b from the central portion to the left and right end portions. Flat upper surfaces 4a and 4b are formed so as not to be present.
The counterweight 4 has an arc-shaped outer edge located outside the rear bonnet 6 and the rear ends of the left and right intermediate covers 7a and 7b in a plan view. Prior to the covers 7a and 7b, the counterweight 4 collides with or comes into contact with an obstacle (wall, implantation, etc.), and the impact from the outside on the rear bonnet 6 and the intermediate covers 7a and 7b is reduced as much as possible.

The left and right swivel covers 10a and 10b are made of sheet metal or resin, and are attached from the left and right front surfaces to the side surfaces of the swivel frame 41 as shown in FIGS. Each swivel cover 10a, 10b is substantially arcuate in plan view with the swivel axis X as the center of curvature.
The left swivel cover 10 a is provided so as to cover the left front side portion of the swivel base 2 from the left front end of the counterweight 4 to the left vertical rib 44 along the left outer peripheral surface of the swivel base 2. That is, the left turning cover 10a covers from the left outer side of the driver seat 21 to the front end of the left vertical rib 44 on the right side of the driver seat 21 through the left front and front of the traveling device control lever 39 and the like. Yes.

The right swivel cover 10 b extends from the right front end of the counterweight 4 to the right vertical rib 44 along the right outer peripheral surface of the swivel base 2, and is provided so as to cover the right front side portion of the swivel base 2. The right swivel cover 10b is formed with a flange-like upper end portion 12b whose upper end edge is bent inward at a substantially right angle, and the upper end portion 12b has an upper surface 62 on which other members can be placed. ing.
A slit-like receiving portion 13b is formed on the upper surface 62 at the rear portion of the upper end portion 12b of the right turning cover 10b to insert and lock a protruding portion 13a of a locking means 13 (to be described later) of the right intermediate cover 7b. Further, the upper surface 62 of the upper end portion 12b in the middle in the front-rear direction is cut out in a substantially U shape in a plan view outwardly to the right so as to engage with a protruding portion 18a of an engagement means 18 described later of the device cover 9. And a receiving portion 18b. Accordingly, the receiving portion 13b of the locking means 13 and the receiving portion 18b of the engaging means 18 are formed on the upper surface 62 of the upper end portion 12b of the right turning cover 10b. It is easy to visually recognize each receiving portion 13b, 18b when 9 is opened and closed.

The right intermediate cover 7 b is provided so as to cover the right rear side of the engine 3 along the outer periphery of the swivel base 2 from the right side of the rear bonnet 6 to the right outward extension of the driver seat 21. An air intake hole 59 that communicates the radiator room 23 and the outside thereof is provided in the approximate center of the right intermediate cover 7b, and a mesh net such as a metal mesh is attached to the air intake hole 59.
The right upper cover 7b has a front upper portion covered by the device cover 9 from above, and below the grip portion 19 so as to easily grip a grip portion 19 (to be described later) of the device cover 9 (particularly from below). A dent 20 that is recessed inward in the left-right direction is provided in the upper front portion of the right intermediate cover 7b. A key hole 64 of the locking tool 63 of the device cover 9 is provided in the approximate center of the recess 20.

The front middle portion of the right intermediate cover 7b is provided with a protruding portion 13a of locking means 13 that locks and positions in the horizontal direction. The protruding portion 13a of the locking means 13 has a flat plate shape and is formed to protrude downward from the lower front portion of the right intermediate cover 7b. The lower end of the protruding portion 13a is formed in a substantially trapezoidal shape, and can be easily inserted into the receiving portion 13b of the right turning cover 10b.
When the right intermediate cover 7b is inserted into the receiving portion 13b and locked to the protruding portion 13a of the locking means 13, the right intermediate cover 7b is moved from the upper surface 4b of the right end portion of the counterweight 4 to the upper end portion 12b of the right turning cover 10b. The upper stay 62 and the top plate 23a of the radiator room 23 come into contact with each other while being mounted over the rear portion of the upper surface 62, and can be mounted. The rear left end (rear mounting portion 11b or mounting portion 11b) and the right rear leg The rear surface 60b of the part 5b comes into contact with and can be attached.

Therefore, the right intermediate cover 7b is fitted from above and placed on the right upper surface 4b of the counterweight 4 and the upper surface 62 of the upper end portion 12b of the right turning cover 10b, and the protruding portion 13a of the locking means 13 can be easily seen. By engaging the receiving portion 13b in the position, the horizontal positioning of the right intermediate cover 7b at the time of attachment can be visually recognized. further,
As shown in FIGS. 1 to 6 and 8, the stay 14 inside the right intermediate cover 7b is formed so as to protrude from the inner surface of the upper part of the right intermediate cover 7b toward the left inward. The lower surface of the stay 14 is in contact with the upper surface of the top plate 23a of the radiator room 23, and the tip of the stay 14 is attached to the top plate 23a with screws or the like. Further, on the inner side surface of the upper part of the right intermediate cover 7b, there is provided a locking tool 63 that locks the device cover 9 by locking with a locking member 15a of an upper wall body 15 to be described later of the device cover 9.

  As shown in FIGS. 1 to 6, the rear mounting portion 11 b of the right intermediate cover 7 b includes upper and lower reinforcing plates 65 and a protruding plate 66 that protrudes inwardly from the upper and lower reinforcing plates 65. The reinforcing plate 65 is an upper and lower two rib-shaped flat plates extending in the left-right direction on the inner surface of the rear portion of the right intermediate cover 7b. It is a substantially rectangular thin plate protruding from the inner side surface of the intermediate cover 7b toward the left inner side. The inner surface (front surface) of the projecting plate 66 is in contact with the rear surface 60b of the right rear leg portion 5b of the support frame 5, and the upper and lower ends of the projecting plate 66 are attached to the rear surface 60b of the right rear leg portion 5b with screws or the like. That is, the protruding plate 66 is fixed at a position closer to the left inward and frontward than the outer surface end of the right intermediate cover 7b, so that the rear mounting portion 11b of the right intermediate cover 7b is located in front of the right end portion of the rear bonnet 6. When the rear bonnet 6 is closed, it is completely covered.

In the right intermediate cover 7b, when one is the front, the other is the rear, and when one is the rear, the other is the front.
Further, the rear attachment portion 11a of the left intermediate cover 7a has the same configuration as the rear attachment portion 11b of the right intermediate cover 7b, and is positioned in front of the left end portion of the rear bonnet 6 and is completely when the rear bonnet 6 is closed. Covered by.
As shown in FIGS. 1 to 3, the device cover 9 is formed to be long in the front-rear direction as a whole on the right side of the swivel base 2 (to the right of the driver's seat 21), and from the upper wall body 15 and the side wall body 16. Mainly composed.

The upper wall body 15 of the device cover 9 is substantially L-shaped from the front surface to the upper surface in a side view, and the right edge is formed in a substantially arc shape in a plan view. Further, the left side edge of the upper wall body 15 is formed in a substantially straight line in the front-rear direction along the right side surface of the boom 45.
The inner surface of the front end portion of the upper wall 15 is pivotally supported on the upper surface of the right front portion of the swivel base 2 via a horizontal shaft 17 of a pivotal support 67 such as a hinge. The upper part, the front side, and the right side of the device room 24 are covered, and the upper part of the upper wall 15 is covered with the radiator room 23. That is, the device cover 9 is swingable forward and upward about the horizontal axis 17 so that the upper, front and right sides of the device room 24 can be opened and closed, and the upper portion of the top plate 23a of the radiator room 23 can be opened and closed. It is said.

The front end of the upper wall 15 is placed on the upper surface 62 at the front of the upper end 12b of the right turn cover 10b when the device cover 9 is closed.
The rear portion of the upper wall body 15 projects rearward from the front end of the right intermediate cover 7b, and covers the mounting portion between the upper stay 14 on the right intermediate cover 7b and the top plate 23a of the radiator room 23 from above. . A substantially U-shaped locking member 15a is provided on the inner surface (lower surface) side of the rear portion of the upper wall body 15 and is provided on the inner surface side of the upper portion of the right intermediate cover 7b and is located above the top plate 23a of the radiator room 23. By locking with the tool 63, the closed state of the device cover 9 can be locked.

As shown in FIGS. 1-6, the right edge of the rear part of the upper wall body 15 is provided with a grip portion 19 that grips when the device cover 9 is opened and closed. The grip portion 19 is integrally formed so that the right edge of the rear portion of the upper wall body 15 protrudes rightward.
As shown in FIG. 9, the gripping portion 19 includes a gripping hole 19 a that is substantially elliptical in plan view and is provided on the rear side edge of the upper wall body 15 and penetrates in the vertical direction. It is good also as what has the handle 19b projected toward the direction.
The side wall 16 of the device cover 9 is formed in an arc shape substantially concentric with the rear bonnet 6 in plan view. Further, the side wall body 16 is provided so as to cover the right side of the control valve 48, the battery 49 and the like along the outer periphery of the swivel base 2 from the front side of the right intermediate cover 7b to the right front end of the swivel base 2.

The upper wall body 15 and the side wall body 16 are a front end inner surface (rear surface) of the upper wall body 15, a front end inner surface (left surface) of the side wall body 16, and an inner surface (lower surface) of the upper wall body 15 in the front-rear direction. And the rear upper inner surface (left surface) of the side wall body 16 are connected to each other by a fixing tool such as a screw via a connecting tool.
A protrusion 18a of an engagement means 18 that engages and positions in the horizontal direction (particularly in the left-right direction) is provided in the middle and lower part of the side wall 16 in the front-rear direction.
As shown in FIG. 7, the protrusion 18 a of the engaging means 18 has a flat plate shape, and is attached with screws or the like so as to protrude downward in the middle part in the front-rear direction of the side wall body 16 and on the lower inner surface side. Yes. The lower end of the protruding portion 18a is curved inward (leftward) to the right turning cover 10b, and the protruding portion 18a can be easily engaged with the receiving portion 18b of the right turning cover 10b when the device cover 9 is opened and closed. It has become.

The device cover 9 is engaged with the receiving portion 18b of the right turning cover 10b at a position where the protruding portion 18a of the engaging means 18 is easily visible when trying to close, so that the front end portion of the upper wall body 15 and The side wall 16 is placed on the upper surface 62 of the upper end portion 12b of the right turning cover 10b, and the locking member 15a with the rear portion of the upper wall 15 covering the right intermediate cover 7b is engaged with the locking member 63 of the right intermediate cover 7b. It can be stopped.
Therefore, the horizontal positioning of the device cover 9 during opening and closing can be easily performed while visually recognizing.

Furthermore, the stay 14 of the right intermediate cover 7b is disposed on the inner side of the right intermediate cover 7b hidden by the device cover 9, and is completely covered when the device cover 9 is closed.
Therefore, the stay 14 of the right intermediate cover 7b is not exposed unless the device cover 9 is opened, and the rear mounting portion 11b of the right intermediate cover 7b is not exposed unless the rear bonnet 6 is opened.
Therefore, the right intermediate cover 7b cannot be removed unless the rear bonnet 6 and the device cover 9 are unlocked and opened, and there is no need to separately provide a locking tool for the right intermediate cover 7b. Can be reduced.

In addition, the fastener of the right intermediate cover 7b can be hidden to prevent unintentional loosening, and the locking means 13 that locks the upper end portion 12b of the right turning cover 10b and performs horizontal positioning is provided. By providing, the right intermediate cover 7b can be attached while visually recognizing the attachment position of the right intermediate cover 7b.
Therefore, the right intermediate cover 7b can be attached and detached simply by opening the rear bonnet 6 and the device cover 9, and maintenance is facilitated.
In addition, this invention is not limited to embodiment mentioned above. Each configuration of the bonnet cover structure 1 or the like, or the overall structure, shape, dimensions, and the like can be appropriately changed in accordance with the spirit of the present invention.

The left and right rear leg portions 5a and 5b of the support frame 5 may be erected on the swivel base 2 with a slight inclination from the vertical.
The rear bonnet 6 may be pivotally supported on the support frame 5 via a vertical axis.
The stay 14 of the right intermediate cover 7 b may be attached to a plate that partitions the radiator room 23 and the equipment room 24.
As shown in FIG. 7, the receiving portion 13b of the locking means 13 may be formed by cutting the upper surface 62 of the upper end portion 12b of the right turning cover 10b to the right outward in a substantially U-shape.

The locking means 13 may be provided with a receiving portion 13b on the right intermediate cover 7b side and a protruding portion 13a on the right turning cover 10b side. Moreover, the latching means 13 should just engage / disengage the right intermediate | middle cover 7b and the right turning cover 10b to an up-down direction, such as making the protrusion part 13a into a round bar shape and making the receiving part 13b into a round hole.
Similarly, the engaging means 18 may also be provided with a receiving portion 18b on the side wall body 16 side of the device cover 9 and a protruding portion 18a on the right turning cover 10b side. Further, the engaging means 18 engages / disengages the device cover 9 and the right turning cover 10b at the time of opening and closing, such as using the receiving portion 18b as a slit, or the protruding portion 18a as a round bar and the receiving portion 18b as a round hole. If it is.

The rear attachment portions 11a and 11b only need to be disposed at the rear portion such as the upper rear portion or the lower rear portion of the left and right intermediate covers 7a and 7b. Further, the rear attachment portions 11 a and 11 b may be attached to the front or side surfaces of the rear leg portions 5 a and 5 b of the support frame 5 as long as they are hidden by the rear bonnet 6. Furthermore, as long as the stay 14 is attached to the top plate 23a of the radiator room 23 at a position hidden by the device cover 9, the stay 14 may be attached to the upper front portion or the upper rear portion of the right intermediate cover 7b.
The driver's seat 21 and the like are arranged on the right side of the swivel base 2, and the radiator 47, the cooling fan 55, the device cover 9, the radiator room 23, the air intake holes 59, and the like may be arranged on the left side of the swivel base 2. Accordingly, the support frame 5, the left and right intermediate covers 7a, 7b, and the like may have shapes and arrangements in which the left and right are reversed.

  In the above-described embodiment, the engine room 22 is formed behind the driver seat 21, the equipment room 24 is formed on the right side of the driver seat 21, and the radiator room 23 is formed therebetween. The engine room 22 may be formed on the side, the equipment room 24 may be formed behind the driver seat 21, and the radiator room 23 may be formed between the engine room 22 and the equipment room 24. The arrangement of the configuration related to the equipment room 24 may be read as the front-rear direction and the left-right direction.

DESCRIPTION OF SYMBOLS 1 Bonnet cover structure 2 Swivel stand 3 Engine 4 Counterweight 5 Support frame 5a, 5b Rear leg part 5c Upper frame 6 Rear bonnet (opening-closing bonnet)
7a, 7b Intermediate cover 8 Device 9 Device cover 10a, 10b Revolving cover 11a, 11b Rear mounting portion 12a, 12b Upper end portion of revolving cover 13 Locking means 14 Stay 15 Upper wall body 16 Side wall body 17 Horizontal shaft 18 Engaging means 19 Grip part 20 Dent 21 Driver's seat 22 Engine room 23 Radiator room 24 Equipment room

Claims (4)

An engine (3) and a counterweight (4) are arranged at the rear of the swivel base (2), and a pair of left and right rear legs (5a, 5b) behind the engine (3) and these left and right rear legs ( A support frame (5) having an upper frame (5c) connecting the upper part of 5a, 5b) above the engine (3) is provided, and is supported by the support frame (5) so that it can be opened and closed. ) And the rear bonnet (6) that covers the left and right rear legs (5a, 5b) from the rear, the intermediate cover (7a, 7b) disposed on the left and right of the rear bonnet (6), and one of these left and right A device cover (9) disposed on the upper front of the intermediate cover (7b) and covering the device (8), and below the device cover (9) and the one intermediate cover (7b), the swivel The swivel cover (10) disposed on the front side of (2) ) And has a,
The one intermediate cover (7b) includes a rear attachment portion (11b) attached to the rear leg portion (5b) of the support frame (5) and covered by the rear bonnet (6) at the rear portion, The swivel cover (10b) is mounted on the upper end (12b) of the swivel cover (10b) and includes a locking means (13) for positioning in the horizontal direction. A bonnet cover structure for a swivel working machine, characterized in that the stay (14) is provided.   The device cover (9) includes an upper wall body (15) extending from the front surface to the upper surface, and a side wall body (16) provided on a side edge of the upper wall body (15). The front lower end of 15) is pivotally supported on the swivel base (2) via a horizontal shaft (17) so that it can be opened and closed, and the rear portion of the upper wall body (15) is more than the front end of the one intermediate cover (7b). Engaging means that projects rearward and covers the stay (14), and the lower portion of the side wall body (16) is placed on the upper end (12b) of the swivel cover (10b) for positioning in the horizontal direction. The bonnet cover structure for a swivel working machine according to claim 1, further comprising (18).   The device cover (9) has a gripping part (19) for gripping when opened and closed at a rear side edge thereof, and a recess for gripping the gripping part (19) on the upper part of the one intermediate cover (7b). The bonnet cover structure for a swing work machine according to claim 2, further comprising (20). An engine room (22), a radiator room (23), and an equipment room (24) are continuously formed around a driver seat (21) mounted on the swivel base (2), and the engine room (22) is formed. An opening / closing bonnet (6) can be opened and closed, and a support frame (5) spanning the engine (3) in the engine room (22) by pivotally supporting the opening / closing bonnet (6), and the radiator room (23) are provided. A removable intermediate cover (7b) for covering, an openable / closable equipment cover (9) for covering the equipment room (24), and the swivel below the equipment cover (9) and the intermediate cover (7b). A swivel cover (10b) disposed on the side of the base (2),
The intermediate cover (7b) is attached to a leg (5b) positioned on the outer peripheral side of the swivel base (2) among the legs of the support frame (5) and is covered with the open / close bonnet (6). An attachment portion (11b) is provided, and the other lower portion is provided with a locking means (13) placed on the upper end portion (12b) of the swivel cover (10b) and positioned in the horizontal direction. A bonnet cover structure for a swivel working machine comprising a stay (14) fixed to the swivel base (2) at a position hidden by the cover (9).

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