JP5124503B2 - Cover device for swivel work machine - Google Patents

Description

  The present invention relates to a cover device for a turning work machine such as a backhoe.

A swivel work machine such as a backhoe is equipped with a swivel that can be swung around a vertical axis on a traveling body, and vehicle auxiliary equipment such as a hydraulic oil tank, a fuel tank, and a control valve are mounted on the side of the swivel. There is a side cover that covers an auxiliary equipment room in which the vehicle auxiliary equipment is disposed, and the side cover is supported by a hinge member on a swivel base so that it can be opened and closed around a horizontal axis (support axis) ( For example, Patent Document 1).
In this type of conventional swivel work machine cover device, the hinge member is generally provided with a plurality of support pieces having attachment holes in a fixing member fixed to the swivel base side, and supported by a connecting member fixed to the side cover side. A plurality of horizontal shafts (support shafts) corresponding to the pieces are provided, and the plurality of horizontal shafts of the connecting member are respectively inserted and held in the mounting holes of the plurality of support pieces of the fixing member, thereby being connected to the fixing member of the hinge member. The member is assembled so as to be rotatable around the horizontal axis, whereby the side cover is supported on the swivel base by a hinge member so as to be openable and closable around the horizontal axis. However, the applicant was actually doing so on the backhoe, a swivel work machine).

JP 2001-3390 A

Therefore, in order to support a cover such as a side cover on the swivel base so as to be openable and closable in the past, a connecting member attached and fixed on the cover side to the mounting holes of a plurality of support pieces mounted and fixed on the swivel side. While aligning the cover with respect to the swivel base side so that the plurality of support shafts coincide with each other, the plurality of support shafts on the cover side are inserted into the mounting holes of the plurality of support pieces of the fixing member, It is necessary to incorporate the connecting member into the fixing member so as to be rotatable around the support shaft.
Therefore, conventionally, the work for supporting the cover on the swivel so as to be opened and closed is very troublesome.

  In view of the above problems, the present invention can easily perform an operation for supporting the cover on the swivel so as to be freely opened and closed.

The technical means of the present invention for solving this technical problem includes a swivel provided on a traveling body so as to be able to swivel about a vertical axis, and a vehicle auxiliary device is mounted on the swivel, and the vehicle auxiliary device is disposed. A cover device for a swivel work machine provided with a cover for covering the auxiliary room, the cover being supported on a swivel base by a hinge member so as to be freely opened and closed,
The hinge member has a fixing member fixed to the swivel base side and a connecting member rotatably connected to the fixing member, and a fitting groove into which a free end portion of the connecting member is inserted is provided in the cover. The free end of the connecting member is inserted into the fitting groove and fixed to the cover with a fastener.

Another technical means of the present invention is that the fitting groove is formed by fixing the connecting plate to the cover so as to close the fitting recess formed in the cover with the connecting plate, and is inserted into the fitting groove. The free end of the connecting member and the connecting plate are fastened and fixed to the cover by a fastener.
According to another technical means of the present invention, the cover is a side cover that is supported on the swivel base so as to be openable and closable around the horizontal axis, and covers the upper wall of the auxiliary equipment room and the auxiliary equipment room. A cover main body integrally having a front wall for closing the front and a side cover body for closing the outer side of the auxiliary device room, the cover main body and the side cover body being connected by a connecting plate, the connecting plate being a cover main body A cover body fixing portion fixed to the cover body, and a side cover body fixing portion that extends outward from the cover body fixing portion and is fixed to the side cover body, and is recessed forward on the lower inner surface of the front wall of the cover body. The fitting recess is formed, and the fitting groove is formed by fixing the cover main body fixing portion of the connecting plate to the lower inner surface of the front wall so as to close the rear opening of the fitting recess. .

According to another technical means of the present invention, the connecting member is provided with a stopper for restricting the insertion depth of the free end portion into the fitting groove, and the free end portion of the connecting member is inserted into the fitting groove. The stopper is in contact with the lower end of the front wall, and the mounting hole on the cover body fixing portion side for inserting the fastener is configured to coincide with the mounting hole on the free end portion of the connecting member. It is in.
Another technical means of the present invention is that a rear side cover adjacent to the rear side of the side cover body of the cover is provided, and the rear side cover is placed on the inner surface of the upper part of the rear side cover. A fixing plate for fixing to the side and a locking mechanism for locking the side cover in a closed state are provided, and the upper wall of the cover body protrudes rearward from the rear end of the side cover body It has an upper wall part, and the rear upper wall part exists in the point which has covered the fixing part by the fixing plate of a rear side cover, and the locking part by the locking mechanism of a rear side cover from the upper side.

  In addition, another technical means of the present invention is provided such that a handle portion for opening and closing the cover is provided on the rear upper wall portion so as to protrude outward, and the handle portion is provided on an upper portion of the rear side cover. Is provided with a recess recessed inward, and the recess is provided with a locking key insertion portion of the locking mechanism.

  According to the present invention, the hinge member that supports the cover on the swivel base includes a fixing member fixed to the swivel base side, and a connecting member that is rotatably connected to the fixing member. In order to support the cover on the swivel so that it can be opened and closed, the free end of the connecting member connected to the fixed member fixed on the swivel is connected to the cover. What is necessary is just to insert in a fitting groove and to fix the free end part of a connection member to a cover with fixing tools, such as a volt | bolt, and the operation | work for supporting a cover so that opening and closing is possible to a swivel base can be done very easily.

It is a side view of the backhoe which shows one Embodiment of this invention. It is a top view of the backhoe. It is a side view of the swivel. It is a top view of the turntable. It is a side view of the turning frame. It is a top view of the turning frame. It is a side view of the front side part cover and the right turning cover part. It is a top view of the front side cover. It is a rear view of the front side cover. It is a side view of the hinge member part. It is a perspective view of the hinge member part. It is a side view of the back side cover. It is a top view of the back side cover. It is a perspective view of the front side cover and the rear side cover part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2, reference numeral 1 denotes an ultra-small turning type backhoe exemplified as a turning working machine (excavation working machine). The backhoe 1 is composed of an upper turning body 2 and a lower traveling body 3. It is configured.
The traveling body 3 includes a crawler traveling device 5 on both the left and right sides of the track frame 4.
Each of the left and right crawler type traveling devices 5 includes a front idler 6, a rear sprocket 7, and a plurality of wheels 8 arranged between the idler 6 and the sprocket 7 around the track frame 4 about the left and right axis. The endless belt-like crawler belt 9 is wound around the idler 6, the sprocket 7, and the plurality of rollers 8, and the sprocket 7 is supported by a traveling motor 10 comprising a hydraulic motor (foil motor). By rotationally driving, a driving force is transmitted from the sprocket 7 to the crawler belt 9, and the crawler belt 9 circulates in the longitudinal direction so that the backhoe 1 can travel in the front-rear direction.

The travel motor 10 is composed of a swash plate type variable capacity axial motor, and can be shifted to a first speed state (low speed state) or a second speed state (high speed state) by switching the angle of the swash plate.
A dozer device 11 is provided at the front of the traveling body 3.
The swivel body 2 includes a swivel base 15 supported on the track frame 4 of the traveling body 3 so as to be able to swivel around a swivel axis in the vertical direction, a cabin 16 mounted on the swivel base 15, and a front of the swivel base 15. And a work device 17 (excavation work device, ground work device) provided on the section side.

3 to 6, the swivel base 15 includes a swivel frame 18 serving as a skeleton (main body portion), and weights that are attached to the rear portion of the swivel frame 18 and constitute the rear surface of the swivel base 15 and the rear sides of the left and right side surfaces. 19, a right turning cover 20 that covers the front side and the right front side of the right side surface of the turning frame 18, a left turning cover that covers the front side and the left front side of the left side surface of the turning frame 18, and the front left side of the upper surface of the turning frame 18. Covering step 22.
The swing frame 18 is supported on the track frame 4 of the traveling body 3 through a swing bearing so as to be swingable about a vertical swing axis, and is fixed on the swing substrate 21 by welding or the like. The member includes a member, a reinforcing member, and the like for mounting and supporting devices, work devices, tanks, and the like on the turning substrate 21.

A support portion 23 that supports the working device 17 is provided on the right side of the front portion of the revolving frame 18 near the center in the left-right direction.
The support portion 23 is disposed on the rear end side of the pair of left and right vertical plates 24L and 24R which are erected on the turning substrate 21 so that the plate surface faces the left and right direction, and the left and right vertical plates 24L and 24R. The rear plate 25 is erected on the swivel board 21 so that the surface faces in the front-rear direction, the bottom plate 26 provided between the left and right vertical plates 24L and 24R, and the front portion between the left and right vertical plates 24L and 24R. And a pair of left and right cylinder brackets 27. A boom pivot 28 is provided at the upper part of the middle part in the front-rear direction of the left and right vertical plates 24L, 24R.

The working device 17 includes a boom 29, an arm 30, and a bucket 31 (working tool).
As shown in FIGS. 1, 3 and 4, a cabin 16, an engine 42, a radiator 43, a fuel tank 44, a hydraulic oil tank 45, a control valve 46 and the like are mounted on the swivel base 15.
The cabin 16 is disposed on the left side of the swivel base 15 (on the left side of the support portion 23). In the cabin 16, the driver 3, the traveling body 3, the work device 17, the swivel base 15, and the like are operated. An operation device or the like is provided.

The engine 42 is disposed horizontally at the rear of the swivel base 15 so that the axis of the crankshaft coincides with the left-right direction, and a hydraulic pump P driven by the engine 42 is attached to the left side of the engine 42.
An air cleaner 48 is disposed above the rear side of the engine 42 and at the center in the left-right direction.
A cooling fan 49 driven by the engine 42 is provided between the radiator 43 and the engine 42. When the cooling fan 49 is driven, the right and left sides of the radiator 43 from the right side (the outer side in the left-right direction) to the engine 42 side The cooling air is configured to flow in the direction.

An oil cooler 51 is arranged on the right side of the radiator 43.
The fuel tank 44 is disposed in front of the left side of the engine 42 and below the step 22.
The hydraulic oil tank 45 stores hydraulic oil that operates hydraulic equipment, and is disposed on the front side of the radiator 43 and on the right side of the support portion 23.
A battery 52 is disposed above the hydraulic oil tank 45.
The control valve 46 is formed by integrating control valves for controlling the hydraulic equipment provided in the backhoe 1, and is configured by connecting the control valves constituting the control valve 46 side by side in a vertical direction. 45 on the front side.

  On the swivel base 15, a bonnet 54 that covers an arrangement space (engine room ER) of the engine 42, the hydraulic pump P, the air cleaner 48, etc. A rear side cover 55 that covers the rear and right side surfaces of the arrangement space (rear auxiliary equipment room RR) of the cooler 51 and the like, and a hydraulic oil tank 45, a battery 52, and a control valve are arranged on the front side of the rear side cover 55. A front side cover 56 is provided to cover the upper surface, right side surface, and front surface of the arrangement space such as 46 and the like, and the upper surface of the arrangement space such as the radiator 43.

The bonnet 54 includes an upper wall 71a of the engine room ER that accommodates the engine 42 and the like, and a bonnet front 57 that forms the upper part of the front wall, a bonnet left 58 that forms the upper left side wall of the engine room ER, and a rear wall of the engine room ER. The main part is composed of an openable / closable bonnet 59 constituting the upper part.
As shown in FIGS. 3 to 6, the lower front wall of the engine room ER is configured by a rear plate 25 of the support portion 23 and upper and lower partition plates 61 and 62 arranged on the left side of the rear plate 25. The lower part of the rear wall and the lower part of the left side wall of the engine room ER are constituted by weights 19.

The bottom wall of the engine room ER is constituted by the turning board 21, and an opening 63 for discharging air in the engine room ER is formed below the engine 42 of the turning board 21.
The weight 19 is formed in an arc shape that protrudes rearward in plan view, and the right side portion of the weight 19 (the side on which the radiator 43 is disposed) extends from the rear side of the radiator 43 to the right side of the radiator 43. It is formed to reach.
As shown in FIGS. 5 and 6, a support frame 64 that supports the hood 54, the rear side of the cabin 16, and the like is provided in the engine room ER.

The support frame 64 is made of a plate material, and a horizontal beam member that connects a pair of left and right front struts 65L and 65R, a pair of left and right rear struts 66L and 66R, and upper portions of the front and rear struts 65L, 65R, 66L, and 66R. 67, and is configured to straddle the engine 42 in the left-right direction.
The upper wall of the bonnet front 57 is mounted and fixed on the cross beam member 67, and the upper part of the rear bonnet 59 is rotatable around the left and right axis via a pair of front and rear hinges. It is attached.

7 to 11, the front side cover 56 is supported on the swivel base 15 by a hinge member 70 so as to be openable and closable around a horizontal axis 86. The front side cover 56 includes a cover main body 71 integrally including an upper wall 71a covering the upper part of the front auxiliary device room TR and a front wall 71b closing the front of the front auxiliary device room TR, and an outer side of the front auxiliary device room TR. The left side surface, the lower surface, and the rear surface of the inner space of the front side cover 56 are open. The cover body 71 is made of synthetic resin or the like, and the side cover body 72 is made of sheet metal or the like.
A connecting plate 74 that connects the cover main body 71 and the side cover body 72 is provided at the front portion of the front side cover 56. The connecting plate 74 includes a cover body fixing portion 75 that is fixed to the cover body 71 and a side cover body fixing portion 76 that extends outward from the cover body fixing portion 75 and is fixed to the side cover body 72. The side cover body fixing portion 76 is fastened and fixed to the inner surface of the rear wall of the cover main body 71 by a fastener 78 such as a bolt on an L-shaped mounting plate 77 protruding from the inner surface of the rear portion of the side cover body 72.

A rear coupling body 79 is provided on the rear side of the front side cover 56, and the rear coupling body 79 is fixed to the inner surface of the upper wall 71a of the cover main body 71 and the rear inner surface of the side cover body 72 by fasteners such as bolts. The cover main body 71 and the side cover body 72 are connected on the rear side of the part cover 56.
A fitting recess 80 that is recessed forward is formed on the lower inner surface of the front wall 71b of the cover body 71, and the cover body fixing portion 75 of the connecting plate 74 is formed on the front wall 71b so as to close the rear opening of the fitting recess 80. It is fixed to the lower inner surface by a fastener 81 such as a bolt, and is fitted between the cover body fixing portion 75 of the connecting plate 74 and the front wall 71b by closing the rear end opening of the fitting recess 80 with the cover body fixing portion 75. A joint groove 82 is formed. As the lower end portion of the cover body fixing portion 75 goes downward, the cover body fixing portion 75 is inclined so as to gradually go inward, whereby the lower end opening of the fitting groove 82 is expanded in the front-rear direction. The fitting groove 82 provided in the front side cover 56 is for inserting a free end portion of a connecting member 85 of the hinge member 70 described later.

The hinge member 70 includes a fixing member 84 fixed to the turntable 15 side, and a connecting member 85 connected to the fixing member 84 so as to be rotatable around a horizontal axis 86. The free end portion of the connecting member 85 is removably inserted into the fitting groove 82 from the lower end side, and the cover main body fixing portion 75 and the free end portion of the connecting member 85 are moved in front of the cover main body 71 by a fastener 87 such as a bolt. It is fastened and fixed to the wall 71b.
A fixing plate portion 89 is provided at the lower end portion of the fixing member 84, a cylindrical support cylinder 90 is provided at the upper end portion of the fixing member 84, a stopper piece 91 is projected forward, and the solid plate portion 89 is a bolt. It is fastened and fixed to the revolving substrate 21 by a fastener such as a nut, and the middle part of the fixing member 84 is fixed to the right revolving cover 20 via a connecting body 92. A pair of left and right support pieces 94 project from the end of the connecting member 85 on the fixing member 84 side, and the pair of support pieces 94 are disposed on the left and right sides of the support cylinder 90 of the fixing member 84. A horizontal shaft 86 in the left-right direction is inserted into the support cylinder 90 and is prevented from being detached by a retaining pin 95. As a result, the connecting member 85 is assembled to the upper end portion of the fixing member 84 so as to be rotatable about the horizontal axis 86, and when the connecting member 85 is rotated forward about the horizontal axis 86 to form a forward projecting pair. The front edge portion of the support piece 94 comes into contact with the stopper piece 91 to restrict further forward rotation.

The connecting member 85 is provided with a stopper 97 for restricting the insertion depth of the free end portion of the connecting member 85 into the fitting groove 82, and when the free end portion of the connecting member 85 is inserted into the fitting groove 82. The stopper 97 is in contact with the lower end of the front wall 71b so that the mounting hole on the cover body fixing portion 75 side for inserting the fastener 87 and the mounting hole on the free end portion of the connecting member 85 are aligned. ing.
As shown in FIGS. 3, 4, and 12 to 14, the rear side cover 55 is disposed above the right side portion of the weight 19 and covers the weight 19 so as to cover the rear side and the right side of the radiator 43. Are formed in a curved shape. The rear side cover 55 is adjacent to the rear side of the side cover body 72 of the front side cover 56, and is for fixing the rear side cover 55 to the swivel base 15 side on the inner surface side of the upper part of the rear side cover 55. And a locking mechanism 99 for locking the front side cover 56 in a closed state. The locking mechanism 99 is attached to the support member 100 fixed to the inner surface of the front side cover 56 by welding or the like with bolts and nuts, etc., and locks the engagement piece projecting on the upper wall 71a of the front side cover 56 so as to be unlocked. The front side cover 56 can be locked in a closed state by the locking mechanism 99. The fixed plate 98 protrudes from the support member 100, and the front side of the rear side cover 55 is fixed to the swivel base 15 via the solid plate 98. A locking piece 101 projects downward from the front lower end of the rear side cover 55, and the locking piece engages with a locking hole (not shown) provided at the upper rear end of the right turning cover 20 so as to be freely disengaged from above. Has been. The rear part of the rear side cover 55 is fixed to the support frame 64 or the like via the rear fixing member 102.

The upper wall 71 a of the cover main body 71 has a rear upper wall portion 104 that protrudes rearward from the rear end of the side cover body 72, and the rear upper wall portion 104 is a portion fixed by the fixing plate 98 of the rear side portion cover 55. And the locking part by the locking mechanism 99 of the rear side cover 55 is covered from the upper side.
A handle 106 for opening and closing the front side cover 56 is provided on the rear upper wall 104 so as to protrude outward, and a finger can be inserted between the handle 106 and the rear upper wall 104. A possible opening 107 is formed. The upper end portion of the rear side cover 55 is provided with a concave portion 108 that is recessed inwardly on the left and right sides corresponding to the handle portion 106, and the locking key insertion portion 109 of the locking mechanism 99 is provided in the concave portion 108.

  According to the embodiment, the hinge member 70 has the fixing member 84 fixed to the swivel base 15 side, and the connecting member 85 connected to the fixing member 84 so as to be rotatable around the horizontal axis 86. Since the front side cover 56 is provided with a fitting groove 82 into which the free end of the connecting member 85 is inserted, in order to support the front side cover 56 on the swivel base 15 so as to be freely openable and closable around the horizontal axis 86 The free end portion of the connecting member 85 connected to the fixing member 84 fixed to the base 15 side is inserted into the fitting groove 82 of the front side cover 56, and the free end portion of the connecting member 85 is connected to the front side portion with a fastener 87 such as a bolt. What is necessary is just to fix to the cover 56, and the operation | work for supporting the front side cover 56 on the turntable 15 so that opening and closing is possible can be performed very simply.

Further, since the fitting groove 82 is formed by closing the rear end opening of the fitting recess 80 with the cover body fixing part 75 between the cover body fixing part 75 and the front wall 71b of the connecting plate 74, the cover The connecting plate 74 that connects the main body 71 and the side cover body 72 can also be used as a member for forming the fitting groove 82 for inserting the free end portion of the connecting member 85, and the configuration of the front side cover 56. The front side cover 56 can be configured more inexpensively with fewer members.
Further, when the front side cover 56 is supported on the swivel base 15 so as to be openable and closable around the horizontal axis 86, the free end part of the connecting member 85 connected to the fixing member 84 fixed to the swivel base 15 side is connected to the front side cover 56. When the free end portion of the connecting member 85 is inserted into the fitting groove 82 by being inserted into the fitting groove 82, the stopper 97 contacts the lower end of the front wall 71b, so that the free end portion is fitted into the fitting groove 82. At the same time as the insertion depth is restricted, the attachment hole on the cover body fixing portion 75 side for inserting the fastener 81 and the attachment hole on the free end portion of the connecting member 85 can be made to coincide with each other. The fastener 81 is inserted into the mounting hole on the cover main body fixing portion 75 side and the mounting hole on the free end portion of the connecting member 85 and tightened, and the front side cover 56 is turned around the horizontal axis 86 on the swivel base 15. Work to support opening and closing freely is even easier. Get.

The upper wall 71 a of the cover body 71 has a rear upper wall portion 104 that protrudes rearward from the rear end of the side cover body 72, and when the front side cover 56 is closed, the cover body of the front side cover 56 The upper wall 71a of the 71 can cover the fixed portion by the fixing plate 98 of the rear side cover 55 and the locked portion by the locking mechanism 99 of the rear side cover 55 from the upper side, and can easily and reliably hide them. By opening the part cover 56, the fixed part and the locked part can be easily opened, which is convenient for attaching the rear side cover 55 and for maintenance.
When the front side cover 56 is opened and closed around the horizontal axis 86, the front side cover 56 may be opened and closed by inserting a hand from the recess 108 into the opening 107 and grasping the handle 106, for example. The front side cover 56 can be easily opened and closed.

  In the above embodiment, the present invention is applied to the front side cover 56. However, the cover to which the present invention is applied is not limited to the front side cover 56, and the rear side cover 55, the rear cover, The present invention can also be applied to the upper cover and other covers, and the rear side cover 55, the rear cover, or the upper cover can be freely opened and closed around the horizontal axis or around the vertical axis around the swivel base 15 by the hinge member 70. You may make it support. Further, a side cover, a rear cover, or an upper cover may be provided on the left side of the bonnet 54 and this cover may be supported on the swivel base 15 by a hinge member 70 so as to be freely opened and closed.

  It can be used for turning machines such as backhoes.

3 traveling body 15 swivel base 55 rear side cover 56 front side cover 71 cover main body 72 side cover body 74 connecting plate 75 cover main body fixing part 80 fitting concave part 81 fastening tool 82 fitting groove 84 fixing member 85 connecting member 86 horizontal axis 97 Stopper 98 Fixing plate 99 Locking mechanism 104 Rear upper wall portion 106 Handle portion 108 Recessed portion 109 Locking key insertion portion

Claims (6)

A turntable (15) is provided on the traveling body (3) so as to be turnable around the vertical axis, and a vehicle auxiliary device is mounted on the turntable (15), and this auxiliary device room (TR ), And a cover device of the turning work machine in which the cover (56) is supported on the turning base (15) by the hinge member (70) so as to be opened and closed.
The hinge member (70) includes a fixing member (84) fixed to the swivel base (15) side, and a connecting member (85) rotatably connected to the fixing member (84). (56) is provided with a fitting groove (82) into which the free end portion of the connecting member (85) is inserted, and the free end portion of the connecting member (85) is inserted into the fitting groove (82) to provide a fastener (87). ) Is fixed to the cover (56).   The fitting groove (82) is formed by fixing the connecting plate (74) to the cover (56) so as to close the fitting recess (80) formed in the cover (56) with the connecting plate (74). The free end of the connecting member (85) inserted into the fitting groove (82) and the connecting plate (74) are fastened and fixed to the cover (56) by a fastener (87). The cover device of the turning work machine according to 1.   The cover (56) is a side cover that is supported on the swivel base (15) so as to be openable and closable around the horizontal axis (86), and is covered with an upper wall (71a) that covers the upper part of the accessory room (TR). A cover main body (71) integrally including a front wall (71b) for closing the front of the instrument room (TR), and a side cover body (72) for closing the outer side of the accessory room (TR). 71) and the side cover body (72) are connected by a connecting plate (74). The connecting plate (74) includes a cover main body fixing portion (75) fixed to the cover main body (71), and a cover main body fixing portion. And a side cover body fixing portion (76) that extends outward from (75) and is fixed to the side cover body (72), and is recessed forward in the lower inner surface of the front wall (71b) of the cover body (71). The fitting recess (80) is formed, and the front so as to close the rear opening of the fitting recess (80) The fitting groove (82) is formed by fixing the cover body fixing portion (75) of the connecting plate (74) to the lower inner surface of the front wall (71b). The cover apparatus of the turning working machine as described in 2.   The connecting member (85) is provided with a stopper (97) for restricting the insertion depth of the free end into the fitting groove (82), and the free end of the connecting member (85) is used as the fitting groove (82). When inserted, the stopper (97) comes into contact with the lower end of the front wall (71b), and the attachment hole on the cover body fixing portion (75) side and the connecting member (85) for inserting the fastener (87) The cover device for a swivel working machine according to claim 3, wherein the cover device is configured to coincide with the mounting hole of the free end portion.   A rear side cover (55) adjacent to the rear side of the side cover body (72) of the cover (56) is provided, and a rear side cover (55) is provided on the inner surface of the upper part of the rear side cover (55). And a locking plate (98) for locking the side cover (56) in a closed state, and a cover plate (71). The upper wall (71a) has a rear upper wall portion (104) protruding rearward from the rear end of the side cover body (72), and the rear upper wall portion (104) is a rear side cover (55). 5. The swivel working machine according to claim 3, wherein the fixed portion by the fixing plate (98) and the locked portion by the locking mechanism (99) of the rear side cover (55) are covered from above. Cover device.   A handle part (106) for opening and closing the cover (56) is provided on the rear upper wall part (104) so as to protrude outward, and the handle part is provided on the upper part of the rear side cover (55). Corresponding to (106), a recess (108) recessed inward is provided, and the locking key insertion part (109) of the locking mechanism (99) is provided in the recess (108). Item 6. A cover device for a turning work machine according to Item 5.

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