JP5497924B2 - Driver's seat protection device for turning work machine - Google Patents

Description

  The present invention relates to a driver's seat protection device for a turning work machine.

2. Description of the Related Art Conventionally, construction machines such as an ultra-small turning machine having a canopy installed to protect an operator on an upper turning body that is turnably mounted on a self-propelled lower traveling body are known.
The canopy that covers the driver's seat of the construction machine from above is a front mounting member that is attached to the front side of the driver's seat, a right front column that is fixed to the front mounting member and extends in the vertical direction, and a rear side that is attached to the rear side of the driver's seat. A side mounting member, a right rear column and a left rear column that are fixed to the rear mounting member and extend in the vertical direction, and a roof that covers the driver's seat attached to the right front column, the right rear column, and the left rear column. (See Patent Document 1).

There is also known an ultra-small turning work machine in which a driver's seat is arranged on one side of a swivel mounted on the upper part of a traveling device so as to be turnable, and the upper part of the driver's seat is covered with a canopy roof.
The canopy roof of this ultra small turning work machine is attached to the upper ends of one front column and two rear columns, and one of the rear columns is placed at the center in the front-rear direction at the left end of the canopy roof. By connecting, the canopy roof protruding in the shape of an eave is supported (refer to FIGS. 1 and 2 of Patent Document 2).

JP 2007-050720 A JP 2000-073404 A

However, the canopy described in Patent Document 1 is such that the upper end of the left rear column and the portion extending in the left-right direction of the L-shaped curved portion of the right rear column are connected, and the roof protruding in the shape of an eave is formed. There is no member that supports the left end.
In addition, the canopy roof described in Patent Document 2 has a rear column that supports the center in the front-rear direction at the left end of the canopy roof that stands on the left side of the driver's seat, which hinders the driver's left view. .

In view of such a point, the present invention connects the front-rear direction midway part of the side beam at one end of the roof frame and the upper end of the rear column that is erected rearward from the driver's seat. It is an object of the present invention to provide a driver's seat protection device for a turning work machine that can reinforce a roof without obstructing the left view.
Further, the present invention provides a member that connects the middle part of the side beam in the front-rear direction and the front strut located on the side and front of the driver's seat or the rear strut located on the rear side of the driver's seat. Another object of the present invention is to provide a driver's seat protection device for a turning work machine that can reinforce the roof without obstructing the field of view.

  An object of the present invention is to provide a driver's seat protection device for a swing work machine that can reinforce a roof without obstructing the driver's view.

In order to achieve the above object, the present invention employs the following technical means.
First, the driver's seat 4 provided on the left and right sides of the boom 3 whose lower side is supported on the swivel base 2 so as to be rotatable about the left and right axis is protected. The driver's seat protection frame 24 provided, the side wall 5 provided between the driver's seat 4 and the boom 3 below the driver seat protection frame 24, and the corner portion 6 from the side wall 5 above the driver's seat protection frame 24. And a roof 7 extending above the driver's seat 4 via
A side window frame forming member 38 having a side window 39 is attached to the side wall 5, and a skylight frame forming member 42 having a skylight 8 is attached from the corner portion 6 to the roof 7.
The upper end of the side window frame forming member 38 and the lower end of the skylight frame forming member 42 are joined, and the joint portion 43 is provided with a ridge portion 45 protruding outward from the front portion to the rear portion. Features.

Second, the side window frame forming member 38 and the skylight frame forming member 42 are formed of a plate-like material, and one of the upper end of the side window frame forming member 38 and the lower end of the skylight frame forming member 42 to be joined to each other. The tortuous portion 45 is formed by bending outward.
Thirdly, the skylight frame forming member 42 is provided with at least one of an upper reinforcing member 9 that crosses the skylight 8 upward and a lower reinforcing member 10 that crosses the skylight 8 downward.

  Fourthly, the driver's seat protection frame 24 is provided between the driver's seat 4 and the boom 3, and the front strut 27 and the rear strut 28 to which the side window frame forming member 38 is attached, and the front strut 27 and A roof frame 30 connected to the upper portion of the rear column 28 and to which the skylight frame forming member 42 is attached together with the upper portion of the front column 27 and the rear column 28, and a corner portion 27a of the front column 27 from an intermediate position in the front-rear direction of the roof frame 30 And a reinforcing frame 46 that is connected to the front column 27 or the rear column 28 and passes through the corner portion 28a of the rear column 28.

  According to the present invention, the front-rear direction midway part of the side beam at one end of the roof frame is connected to the upper end of the rear column that is erected rearward from the driver's seat, or the front-rear direction of the side beam at one end of the roof frame One side end of the roof without obstructing the driver's left field of view by providing a member that connects the midway part to the front strut located in front of or behind the driver seat. The support of can be strengthened.

  In the invention according to claim 1, the joint portion 43 between the upper end of the side window frame forming member 38 and the lower end of the skylight frame forming member 42 is provided with a ridge portion 45 protruding outward from the front end to the rear end. Thus, the raindrop 45 prevents the rainwater from dripping to the side window 39, and the raindrop 45 serves as a reinforcing rib, so that the strength of the skylight frame forming member 42 is improved and the driver's view is reduced. The roof can be reinforced without hindering, and the side window frame forming member 38 can also be reinforced, so that the strength of the entire driver's seat protection frame 24 can be improved.

Since the invention which concerns on Claim 2 bends one side of the upper end of the side window frame formation member 38 mutually joined, or the lower end of the skylight frame formation member 42 outward, and forms the loose part 45, a toe part 45 can be formed easily and easily.
In the invention according to claim 3, the skylight frame forming member 42 is provided with at least one of the upper reinforcing member 9 that crosses the skylight 8 upward and the lower reinforcing member 10 that crosses the skylight 8 downward. The member 42 can be reinforced, and consequently the strength of the driver seat protection frame 24 can be improved.

  In the invention according to claim 4, the driver's seat protection frame 24 passes between the corner portion 27 a of the front column 27 and the corner portion 28 a of the rear column 28 from the intermediate position in the front-rear direction of the roof frame 30. Since the reinforcing frame 46 connected to the rear column 28 is provided, the strength of the driver seat protection frame 24 can be improved, and the side window frame forming member 38 and the skylight frame forming member 42 can be reinforced.

The enlarged front view near the skylight of a driver's seat protection device. The enlarged plan view near the skylight of a driver's seat protection device. The enlarged side view near the skylight of a driver's seat protection device. The side view of the turning work machine provided with the driver's seat protection apparatus. The front view of a driver's seat protection device. The top view of a driver's seat protective device. The side view of a driver's seat protection device. The enlarged front view of the toe part of a driver's seat protection device. The left lower perspective view of the driver's seat protection frame concerning a 1st embodiment. The lower left expansion perspective view of the lower part of a back 1st support | pillar and a back 2nd support | pillar. The upper right perspective view of the driver's seat protection frame concerning a 2nd embodiment. The side view of a driver's seat protection frame. The top view of a driver's seat protection frame. The left lower perspective view of the driver's seat protection frame concerning a 3rd embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 10 illustrate an ultra-small turning type turning work machine 11 including a driver seat protection frame 24 according to the first embodiment of the present invention.
The turning work machine 11 includes a lower traveling device 12 constituted by a crawler type traveling device and an upper turning body 13.

The swivel body 13 includes a swivel base 2 supported on a traveling device 12 via a swivel bearing 14 so as to be pivotable about a vertical swivel axis, an excavator 15 provided on the swivel base 2, and a driver's seat. 4. A driver's seat protection device 1 is provided.
The driver's seat 4 and the driver's seat protection device 1 are disposed on the left side of the turntable 2, and a traveling device control lever 16 that controls the traveling device 12 is provided on the front side of the driver's seat 4. In addition, a service port pedal 17 is provided on the left side of the traveling device control lever 16, and on the left and right sides of the driver's seat 4, an excavator operation lever 18 for operating the excavator 15 is disposed.

  The swivel base 2 is a protector 19 having a swivel frame as a skeleton and a balance weight function that is attached to the rear end side of the swivel frame and constitutes the rear part of the swivel base 2 and balances the weight with the excavator 15. And a revolving cover 20 that covers the front side and front side of the protector 19 on the left and right side surfaces of the revolving frame, a step 21 that covers the revolving frame upper surface side on the front side of the driver's seat 4, and the like.

  The swivel frame has a swivel board made of a thick plate that constitutes the bottom of the swivel base 2, and is located on the right side of the swivel board at a position close to the center in the left-right direction. A pair of vertical ribs (not shown) is provided, and a boom mounting portion is provided between the left and right vertical ribs so that the base (lower portion) of the boom 3 of the excavator 15 is swingably mounted about the left and right axes.

In addition, devices such as an engine and a radiator, and tanks such as a fuel tank and a hydraulic oil tank protrude upward from the upper surface of the swivel base 2, and these devices and tanks are covered with a cover body 22.
The cover body 22 includes an hood 23 that forms an engine room and covers the engine, and a right side cover body that covers a radiator, a fuel tank, a hydraulic oil tank, a battery, and the like.

  As shown in FIGS. 1 to 10, the driver seat protection device 1 includes a driver seat protection frame 24 erected on the right side (direction approaching the boom 3) side of the driver seat 4, and the driver seat protection frame 24. The side wall 5 attached to the lower part, the roof 7 extending from the side wall 5 through the corner part 6 and provided on the upper part of the driver's seat protection frame 24, and the above-mentioned traveling device control lever from the lower front part of the driver's seat protection frame 24 The front handrail 25 is connected to the left 16 (the direction away from the boom 3), and the rear handrail 26 is connected to the left front side of the driver's seat 4 from the lower left rear part of the driver's seat protection frame 24. Has been.

  The driver's seat protection frame 24 is formed of a pipe material and supports the driver's seat protection device 1 as a whole. The driver's seat protection frame 24 is located between the driver's seat 4 and the boom 3 and is erected right in front of the driver's seat 4. A first post 28 that is erected between the driver's seat 4 and the boom 3 at a predetermined interval behind the front post 27 and a left outer side of the first post 28. The rear second column 29 erected on the rear side of the driver's seat 4 together with the rear first column 28, the front column 27, the roof frame 30 connecting the upper portion of the rear first column 28 and the rear second column 29, and the front The front and rear frame members 31 connecting the support column 27 and the rear first support column 28, and the first horizontal frame member 32 and the second horizontal frame member 33 connecting the rear first support column 28 and the rear second support column 29. And.

The front column 27, the rear first column 28, and the rear second column 29 are substantially parallel to each other and extend in the vertical direction.
The front column 27 is provided so as to extend upward from the left side surface on the front end side of the left vertical rib of the revolving substrate. Further, the lower end of the front column 27 is fixed to the left vertical rib with a bolt or the like via the front mounting plate 34. Further, the front column 27 is connected to the roof frame 30 by being extended to the left (in the direction away from the side wall 5) sideward through a front corner portion 27a whose upper portion is bent to the left of the turning work machine 11.

The lower end of the rear first support column 28 is positioned on the right side (direction approaching the side wall 5) behind the driver's seat 4 and is fixed to the swivel base 2 via a rear mounting plate 32a described later. Further, the rear first support column 28 is bent to the left side of the turning work machine 11 and then extended to the left side through the first corner portion 28 a to be connected to the roof frame 30.
The rear second support column 29 has a lower end located on the left side behind the driver's seat 4 and is fixed to the swivel base 2 via a rear mounting plate 32a described later. Further, the upper part of the rear second support column 29 is bent to the front and to the left (in the direction away from the rear first support column 28) from the portion where the second horizontal frame member 33 and the rear second support column 29 are connected, and then second. An arm portion 29b extends forward and to the left via the corner portion 29a. Further, the upper end of the arm portion 29b of the rear second support column 29 is connected to the roof frame 30 via the connection portion 29c.

In addition, the connection portion 29c of the rear second support column 29 is located behind the driver seat 4 on the left outer side.
The roof frame 30 includes a front beam 30a that is disposed on the front side and extends in the left-right direction in a substantially straight line, a rear beam 30b that is disposed on the rear side and extends in the left-right direction in a substantially straight line, and the left ends of the front beam 30a and the rear beam 30b. And a side beam 30c in which a midway part in the front-rear direction bulges to the left. Therefore, the entire roof frame 30 is formed in a substantially U shape in a plan view extending leftward from the upper portion of the front column 27 and the upper portion of the rear first column 28.

  Further, the roof frame 30 is integrally formed with the front strut 27 by extending the upper part of the front strut 27 outwardly to the left through the front corner portion 27a until the midway portion in the left-right direction of the front beam 30a of the roof frame 30. By bending the front part of the side beam 30c of the roof frame 30 toward the front column 27 and extending rightward inward, the middle part of the front beam 30a of the roof frame 30 is integrally formed with the side beam 30c. Has been. Further, the front beam 30a of the roof frame 30 connects the front beam portion on the front column 27 side and the front beam portion on the side beam 30c side via the front connection member 35a.

  Further, the roof frame 30 is configured such that the upper portion of the rear first support column 28 extends to the left outward through the rear first corner portion 28a, so that the middle part in the left-right direction of the rear beam 30b of the roof frame 30 is rear first. It is formed integrally with the column 28, and the rear part of the side beam 30c of the roof frame 30 is bent to the rear first column 28 side and extends to the right inward, so that the middle part of the rear beam 30b of the roof frame 30 in the horizontal direction Is integrally formed with the rear first support column 28. Further, the rear beam 30b of the roof frame 30 connects the rear beam portion on the rear first support column 28 side and the rear beam portion on the side beam 30c side via a rear connection member 35b.

And the roof frame 30 and the rear 2nd support | pillar 29 are connected in the front-back direction middle part of the side beam 30c.
Specifically, a location located in the middle between the central portion in the front-rear direction and the rear end of the side beam 30c of the roof frame 30 is connected to the connection portion 29c at the upper end of the rear second support column 29. In addition, the front-rear direction center part of the side beam 30c of the roof frame 30 and the connection part 29c at the upper end of the rear second support column 29 may be coupled.

  Further, the roof frame 30 includes a reinforcing beam 36 that connects a front-rear halfway part of the front beam 30a and a rearward halfway part of the rear beam 30b in the front-rear direction. The reinforcing beam 36 is a frame member having a substantially U-shaped cross section, and includes a left side portion of the front beam 30a where the front column 27 side and the side beam 30c side are connected, and the rear first column 28 of the rear beam 30b. The left side part of the location which connected the side and the side beam 30c side is tied. That is, the reinforcing beam 36 connects the front beam 30a on the side beam 30c side and the rear beam 30b on the side beam 30c side.

Thereby, the twist of the roof frame 30 can be prevented, and the strength of the roof frame 30 against the load in the front-rear direction can be ensured.
The front / rear frame member 31 is a frame member having a substantially U-shaped cross section, and connects a vertically middle part below the front support column 27 and a lower end portion of the rear first support column 28. Further, the front and rear frame members 31 are arranged so that their positions increase as they go rearward.

Thereby, the intensity | strength of the front support | pillar 27 and the back 1st support | pillar 28 with respect to the load of the front-back direction can be improved.
The front / rear frame member 31 may be formed of a pipe member, and may connect the front beam 30a and the rear beam 30b straightly in the horizontal direction. The front and rear frame members 31 connect the lower part of the front column 27 and the lower part of the rear first column 28 to each other, or the middle part of the front column 27 and the middle part of the rear first column 28 in the vertical direction. They may be connected to each other.

The first horizontal frame member 32 has a substantially rectangular rear mounting plate 32a that is long in the left-right direction, and a substantially rectangular auxiliary plate 32b that is erected at the substantially center in the front-rear direction of the rear mounting plate 32a and that is long in the left-right direction. Are connected in a reverse T shape in a side view, and the lower part of the rear first support column 28 and the lower part of the rear second support column 29 are connected.
The rear mounting plate 32a is a substantially rectangular plate-shaped body in which only the left rear corner is cut obliquely, and the lower end of the rear first support column 28 is fixed to the right end side of the rear mounting plate 32a. The lower end of the rear second support column 29 is fixed to the left end side of the plate 32a. The rear mounting plate 32a is attached to a fixed cover body (not shown) of the swivel base 2 on the rear side of the driver's seat 4 with bolts or the like.

The auxiliary plate 32b has an upper end bent forward and both left and right ends connected to the lower portion of the rear first support column 28 and the lower portion of the rear second support column 29, respectively.
Thus, the auxiliary plate 32b is connected simultaneously with the three members of the rear first column 28, the rear second column 29, and the rear mounting plate 32a, thereby preventing the rear first column 28 and the rear second column 29 from being twisted. The connection between the rear first support column 28, the rear second support column 29, and the rear mounting plate 32a is reinforced.

In addition, the auxiliary | assistant board 32b may be formed with the uniformly flat plate-shaped body which the upper end part is not bent.
The second horizontal frame member 33 is formed of a pipe material extending in the left-right direction, and both left and right ends thereof are connected to the middle part in the vertical direction of the rear first column 28 and the middle part in the vertical direction of the rear second column 29, respectively. Has been. Further, a corner plate 37 having a substantially right triangle shape is provided to connect the second horizontal frame member 33 and the rear first support column 28, and the second horizontal frame member 33 and the rear second support column 29, respectively.

Thereby, the back first support column 28 and the rear second support column 29 are prevented from being twisted, and the strength of the rear first support column 28 and the rear second support column 29 against the load in the left-right direction can be ensured.
As described above, the driver's seat protection frame 24 extends in the longitudinal direction of the side beam 30c of the roof frame 30 extending in the front-rear direction and in the left-right direction (that is, a direction different from the extending direction of the side beam 30c). By having the second support column 29 after connecting the extended first horizontal frame member 32, it is possible to exert strength against a load from any direction such as front and rear, left and right, and up and down directions. 4 is protected from front and rear, left and right, and top and bottom.

As shown in FIGS. 9 and 10, the lower end portions of the rear first support column 28 and the rear second support column 29 in the driver's seat protection frame 24 are deformed in cross-section in a predetermined cross shape from the lower ends thereof, that is, pipes. The side surface of the material may be crushed from predetermined four directions such as left front, right front, left rear, and right rear, and may have a substantially cross-sectional shape extending in four directions such as front and rear, left and right.
Thus, the rear first support column 28 and the rear second support column 29 can be attached to the rear mounting plate 32a with sufficient strength without using the auxiliary plate 32b. Therefore, the number of members can be reduced, and the driver seat protection device 1 can be reduced in cost and weight.

The side wall 5 is erected between the driver seat 4 and the boom 3, that is, on the left side of the left vertical rib and on the right side of the driver seat 4, and the front column 27 and the rear first column of the driver seat protection frame 24. A side window frame forming member 38 is attached to 28.
The side window frame forming member 38 is formed of a plate-like material, and is disposed on the right side of the front support column 27 and the rear first support column 28 and on the left side of the left vertical rib of the turning board. The front and rear end edges of the side window frame forming member 38 are fixed to the front column 27 and the rear first column 28, and the front lower end side is fixed to the left vertical rib with a bolt or the like.

Further, a side window 39 formed by fitting flat glass or the like through trim rubber is provided in an opening formed over almost the entire upper portion of the side window frame forming member 38. Moreover, glass etc. may be adhere | attached.
An intermediate frame member 40 (three in the present embodiment) for connecting the front support column 27 and the rear first support column 28 is provided on the left side of the side window 39 in the vertical direction. A handle 41 is provided so as to connect the two front portions.

The roof 7 is extended from the upper end of the side wall 5 so as to protrude leftward through a corner portion 6 curved leftward of the turning work machine 11, and smoothly extends from the side wall 5 to the roof 7. Further, a skylight frame forming member 42 is covered from above from the upper end portions of the front column 27 and the rear first column 28 in the driver's seat protection frame 24 to the front corner portion 27a, the rear first corner portion 28a and the roof frame 30. Yes.

Further, the roof 7 covers the entire driver's seat 4 from above, and the left end of the roof 7 protruding in an eaves-like shape is located on the left outside of the driver's seat 4.
The skylight frame forming member 42 is formed of a plate-like material, and is on the right side of the upper ends of the front column 27 and the rear first column 28, on the upper right side of the front corner portion 27a and the rear first corner portion 28a, and on the upper side of the roof frame 30. Has been placed. The lower right end of the skylight frame forming member 42 is joined to the side window frame forming member 38 via the joining portion 43, and is fixed to the upper ends of the front strut 27 and the rear first strut 28. Further, the front and rear end edges of the skylight frame forming member 42 are at the upper end portions of the front strut 27 and the rear first strut 28, the front corner portion 27a, the rear first corner portion 28a, and the portion protruding to the left of the roof frame 30. It is fixed. Further, the left edge of the skylight frame forming member 42 is fixed to the side beam 30 c of the roof frame 30.

As shown in FIG. 1, the skylight frame forming member 42 is provided with a skylight 8, an upper reinforcing member 9 that crosses the skylight 8 upward, and a lower reinforcing member 10 that crosses the skylight 8 downward. .
The skylight 8 is formed by fitting glass or the like having a curved shape along the corner portion 6 through a trim rubber into an opening formed from the front right lower end of the skylight frame forming member 42 to the right side of the reinforcing beam 36. ing. Moreover, glass etc. may be adhere | attached.

The upper reinforcing member 9 is composed of two strips (strip-shaped plate members) whose longitudinal direction is the vertical direction, that is, the vertical direction, and is disposed so as to extend forward and backward over the skylight 8. In addition, the upper reinforcing member 9 is provided in front of the skylight 8 and on the upper surface of the skylight frame forming member 42 via a plate-like mounting portion 44 so that the two strips are bolted at intervals in the left-right direction. Is fixed.
The upper reinforcing member 9 may directly fix the band plate to the upper surface of the skylight frame forming member 42.

  The lower reinforcing member 10 is composed of two rod-like bodies extending in the front-rear direction, and the front and rear ends of each rod-like body are bent upward at a substantially right angle. Further, the lower reinforcing member 10 is disposed so as to extend in the front-rear direction below the skylight 8, and two rod-like bodies are provided side by side in the left-right direction. That is, the lower reinforcing member 10 is fixed to the lower surface of the skylight frame forming member 42 before and after the skylight 8 with both ends of the two rod-like bodies bent side by side in the left-right direction. Therefore, the lower reinforcing member 10 extends in the front-rear direction and is separated by the length of both ends bent below the skylight 8.

Thereby, the downward reinforcement member 10 can reinforce the periphery of the opening part of the roof 7 from the lower part across the skylight 8.
Further, the attachment positions of both ends of the lower reinforcement member 10 are located substantially below the attachment portion 44 of the upper reinforcement member 9 in a side view, and the lower reinforcement member 10 is substantially parallel to the upper reinforcement member 9.
Further, the lower reinforcing member 10 is disposed at a position shifted in the side-by-side direction (left-right direction) with respect to the upper reinforcing member 9. Further, the lower reinforcing member 10 overlaps the upper reinforcing member 9 on the extension of the line of sight of the driver sitting on the driver's seat 4, that is, arranged on a line connecting the upper reinforcing member 9 and the driver's viewpoint. It may be.

Accordingly, the lower reinforcing member 10 can be provided while minimizing the hindrance to the driver's view by the lower reinforcing member 10.
On the other hand, the lower reinforcing member 10 may be disposed at a position corresponding to the upper reinforcing member 9, that is, on the lower surface of the skylight frame forming member 42 immediately below the attachment position of each band plate of the upper reinforcing member 9. Thereby, the roof 7 before and behind the skylight 8 can be firmly reinforced from above and below.

The upper reinforcing member 9 and the lower reinforcing member 10 may be one, or three or more strip plates may be provided in the left-right direction at a predetermined interval.
Further, the lower reinforcing member 10 may be constituted by a band plate.
As shown in FIG. 8, at the joint portion 43 between the side window frame forming member 38 and the skylight frame forming member 42, the predetermined width of the lower edge of the skylight frame forming member 42 is bent to the right at a substantially right angle from the front end to the rear end. Toyu part (rain part) 45. Further, the upper end of the side window frame forming member 38 is fixed to the lower surface of the bent lower end edge by welding or the like.

Accordingly, rainwater or the like flows through the heel portion 45 to the front and rear ends of the side window frame forming member 38, and it is possible to prevent drops from dripping onto the side window 39. Moreover, in the junction part 43 of the side window frame formation member 38 and the skylight frame formation member 42, the side window frame formation member 38 and the skylight frame formation member 42 can be firmly connected without interposing another joining member.
Note that the predetermined width of the upper edge of the side window frame forming member 38 may be bent to the right to form the loose portion 45.

The front handrail 25 is formed of a pipe material, and is disposed in front of the traveling device control lever 16 in front of the driver's seat 4 and in front of the service port pedal 17. The front rail 25 is composed of an upper portion 25a, a midway portion 25b, and a lower portion 25c.
The upper part 25a of the front handrail 25 is left from the lower part of the front support 27 of the driver's seat protection frame 24 (upper left part of the position where the front end of the front and rear frame member 31 and the front support 27 are connected) to the front of the driver's seat 4 substantially. It is arrange | positioned so that it may extend in the substantially horizontal direction.

  The middle portion 25b of the front rail 25 has a substantially U-shape when viewed from the front, extends in a substantially horizontal direction from the left end of the upper portion 25a to the left rear, and is substantially perpendicular to the front left side of the driver seat 4 downward. After being bent and extended downward by a predetermined distance (that is, to secure a space in which the service port pedal 17 can be disposed below the midway portion 25b), it is bent at a substantially right angle from its lower end toward the right front. It arrange | positions so that it may extend in a substantially horizontal direction to the front.

The lower part 25c of the front handrail 25 extends downward from the right end below the midway part 25b to the front left of the traveling device control lever 16 and to the right front of the service port pedal 17, and is then fixed to the upper surface of the step 21 with a bolt or the like. Has been.
The service port pedal 17 is located below the middle portion 25b of the front rail 25, and the driver's feet can be placed below the middle portion 25b without hindering the driver's pedal operation.

The rear handrail 26 is formed of a pipe material, and is arranged from the rear of the driver seat 4 to the left. The rear handrail 26 includes an upper portion 26a, a midway portion 26b, and a lower portion 26c.
The upper part 26 a of the rear handrail 26 is arranged so as to extend in a substantially horizontal direction from the lower part of the rear second support post 29 of the driver seat protection frame 24 to the left rear of the driver seat 4.

The midway part 26b of the rear handrail 26 is disposed so as to extend in an inclined direction that moves downward as it goes leftward from the left end of the upper part 26a and in an inclined direction that moves downward as it goes forward.
The lower part 26c of the rear handrail 26 extends downward by a predetermined length from the front end of the midway part 26b, and then is bent at a substantially right angle toward the right and extends substantially horizontally to the lower left side of the driver's seat 4. The left side of the base portion of the driver's seat 4 is fixed with a bolt or the like.

11 to 13 show a driver seat protection frame 24 according to the second embodiment of the present invention.
The driver seat protection frame 24 of the second embodiment is most different from the first embodiment in that a reinforcing frame that connects a midway portion in the front-rear direction of the side beam 30c of the roof frame 30 and a front column 27 extending in the vertical direction. 46.
The reinforcing frame 46 is formed of a pipe material. From the intermediate position between the front and rear beams 30a and 30b of the roof frame 30, the front corner portion 27a of the front column 27, the rear first corner portion 28a of the rear first column 28, and Between the front strut 27 and the rear first strut 28.

  The reinforcing frame 46 includes an upper portion 46a extending leftward from the center portion in the front-rear direction of the side beam 30c of the roof frame 30, a center corner portion 46b bent downward from the right end of the upper portion 46a, and the center corner. The intermediate portion 46 c extends downward from the lower end of the portion 46 b, and the lower portion 46 d that extends forward from the lower end of the intermediate portion 46 c and connects to the intermediate portion in the vertical direction of the front column 27.

The upper end 46a of the reinforcing frame 46 has a left end at the center in the front-rear direction of the side beam 30c of the roof frame 30 (immediately before the connection portion between the side beam 30c of the roof frame 30 and the connection portion 29c of the rear second support column 29). It is connected. Further, the upper portion 46a is disposed so as to extend in the left-right direction at a substantially intermediate position in the front-rear direction between the front beam 30a and the rear beam 30b of the roof frame 30.
The central corner portion 46b of the reinforcing frame 46 extends from the right end of the upper portion 46a to the front corner portion 2 of the front column 27.
7a and the rear first support column 28 are bent downward so as to be parallel to the rear first corner portion 28a.

  The midway portion 46c of the reinforcing frame 46 extends downward from the lower end of the central corner portion 46b, and is arranged so as to extend in the vertical direction at a substantially intermediate position in the front-rear direction between the front strut 27 and the rear first strut 28. Yes. The midway portion 46 c hangs down to the midway portion in the vertical direction substantially parallel to the front column 27 and the rear first column 28, and the lower end of the midway portion 46 c is located at the approximate center of the side window 39 on the side wall 5. Yes.

The lower part 46d of the reinforcing frame 46 extends forward and downward from the lower end of the midway part 46c. The lower end of the lower part 46d is connected to the middle part in the vertical direction of the front support 27 (the part directly above the part where the front handrail 25 and the front support 27 are connected).
That is, the reinforcing frame 46 is extended so as to extend rightward from the vicinity of the connection portion between the roof frame 30 and the connection portion 29c of the rear second support column 29 so as to be parallel to the front corner portion 27a and the rear first corner portion 28a. Curved downward in the same manner, suspended to the middle in the vertical direction substantially parallel to the front support column 27 and the rear first support column 28, and then extended to the front downward direction substantially parallel to the front and rear frame material 31 to move up and down the front support column 27. Linked to midway.

Further, the reinforcing frame 46 passes through the rear of the skylight 8 in the left-right direction, and the skylight frame forming member 42 is covered above the reinforcing frame 46.
Thereby, the strength over the side wall 5 from the tip of the roof 7 in the driver's seat protection device 1 through the corner portion 6 can be improved.
In the second embodiment, the reinforcing beam 36 is not provided.

Further, the lower right end of the reinforcing frame 46 may be connected to the middle part in the vertical direction of the rear first support column 28. Further, the second horizontal frame member 33 and the corner plate 37 may not be provided.
The side window frame forming member 38 includes a front upper part attached over the middle part 46c and lower part 46d of the reinforcing frame 46 and the front column 27, a middle part 46c, lower part 46d, front column 27 and the rear first column of the reinforcing frame 46. 28 may be divided into a substantially L-shaped portion that is attached to the main body 28. Further, the intermediate frame member 40 may be arranged separately in the front and rear.

FIG. 14 shows a driver seat protection frame 24 according to the third embodiment of the present invention.
The most different point of the driver seat protection frame 24 of the third embodiment from the first and second embodiments is that the middle part of the side beam 30c in the front-rear direction is connected to the front strut 27 located laterally and forward of the driver seat 4. The upper part of the rear second support column 29 extends upward and is connected to the roof frame 30 while including the reinforcing frame 46 to be connected.

The upper part of the rear second support column 29 extends substantially straight upward without curving forward, does not have the rear second corner part 29a and the arm part 29b, and the rear second support pillar 29 has a roof frame. 30 is connected to a bent portion between the rear beam 30b and the side beam 30c via a connection portion 29c.
Further, the reinforcing frame 46 includes a substantially intermediate position in the front-rear direction between the front corner portion 27a and the rear first corner portion 28a from the middle portion in the front-rear direction of the side beam 30c of the roof frame 30, and the front strut 27 and the rear first strut. It extends through the substantially middle position in the front-rear direction between 28 and is connected to the middle part in the vertical direction of the front column 27.

Note that the connection portion 29 c of the rear second support column 29 is located behind the connection portion between the side beam 30 c of the roof frame 30 and the reinforcing frame 46.
As a result, it is possible to secure the left field of view of the driver while supporting the left end of the roof 7 projecting leftward in the shape of an eave.
In the third embodiment, the reinforcing beam 36 is provided together with the reinforcing frame 46.

Specifically, the reinforcing beam 36 includes a front reinforcing beam 36a that connects the front beam 30a of the roof frame 30 and the upper portion 46a of the reinforcing frame 46, and a rear reinforcement that connects the upper portion 46a of the reinforcing frame 46 and the rear beam 30b of the roof frame 30. It is comprised from the beam 36b.
The front reinforcing beam 36a straightly connects the central portion in the left-right direction of the front beam 30a in the roof frame 30 and the central portion in the left-right direction of the upper portion 46a in the reinforcing frame 46.

The rear reinforcing beam 36b is arranged in the left-right direction center of the upper portion 46a of the reinforcing frame 46 and the roof frame 30.
The rear beam 30b is connected straight to the center in the left-right direction.
Thereby, the strength over the side wall 5 from the tip of the roof 7 in the driver's seat protection device 1 through the corner portion 6 and the strength in the front-rear direction of the roof 7 can be improved.
In addition, this invention is not limited to embodiment mentioned above. Each configuration of the driver's seat protection device 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 driver's seat 4, the driver's seat protection device 1 and the driver's seat protection frame 24 may be arranged on the right side of the turntable 2, and accordingly, the driver's seat protection device 1 and the driver's seat protection frame 24 are reversed left and right. It may be the shape which became.
The side beam 30c of the roof frame 30 may have a linear shape, a substantially triangular shape in plan view, or a substantially trapezoidal shape in plan view, and the entire roof frame 30 is formed in a substantially U shape in plan view or a substantially home base shape in plan view. It may be.

The reinforcing beam 36 may be formed of a pipe material.
Further, the reinforcing beam 36 is a portion where the front beam 27a and the side beam 30c side of the front beam 30a are connected to the right side portion, and the rear first column 28 side and the side beam 30c side of the rear beam 30b are connected. May be connected to the right-hand side portion. That is, the reinforcing beam 36 may connect the front beam 30a on the front column 27 side and the rear beam 30b on the rear first column 28 side.

Further, the reinforcing beam 36 may be one that connects the front beam 30a and the rear beam 30b obliquely, and the reinforcing beam 36 may not be provided.
The reinforcing frame 46 may be a frame material having a substantially U-shaped cross section. Moreover, the connection location of the left end of the reinforcement frame 46 and the side beam 30c of the roof frame 30 may be shifted back and forth from the center part in the front-rear direction of the side beam 30c. Furthermore, the connection location between the reinforcing frame 46 and the side beam 30c may be the same position as the connection location between the connection portion 29c of the rear second support column 29 and the side beam 30c. The reinforcing frame 46 may be a short frame that connects only the connecting portion between the connecting portion 29c of the rear second support column 29 and the side beam 30c to the central portion in the front-rear direction of the reinforcing beam 36.

DESCRIPTION OF SYMBOLS 2 Swivel 3 Boom 4 Driver's seat 24 Driver's seat protection frame 27 Front strut 27a Front corner front part 28 Rear first strut 28a Rear first strut rear first corner 29 Rear second strut 30 Roof frame 30a Roof frame Front beam 30b Rear beam 30c Roof frame side beam 31 Front / rear frame material 32 First horizontal frame material 33 Second horizontal frame material 35a Front beam front coupling member 35b Rear beam rear coupling member 36 Reinforcement beam 46 Reinforcement frame

Claims (4)

The driver seat (4) provided on the left and right sides of the boom (3) whose lower side is supported on the swivel base (2) so as to be rotatable about the left and right axes is protected. A driver's seat protection frame (24) erected on the side, and a side wall (5) provided between the driver's seat (4) and the boom (3) below the driver's seat protection frame (24); A roof (7) extending above the driver's seat (4) from the side wall (5) through the corner (6) at the top of the driver's seat protection frame (24);
A side window frame forming member (38) having a side window (39) is attached to the side wall (5), and a skylight frame forming member (42) having a skylight (8) from the corner portion (6) to the roof (7). ) Is attached,
The upper end of the side window frame forming member (38) and the lower end of the skylight frame forming member (42) are joined together, and the protruding portion (45) protrudes outward from the front portion to the rear portion at the joint portion (43). ), A driver's seat protection device for a swing work machine.   The side window frame forming member (38) and the skylight frame forming member (42) are formed of a plate-like material, and the upper end of the side window frame forming member (38) to be joined to each other or the skylight frame forming member (42). The driver's seat protection device for a swivel work machine according to claim 1, wherein one of the lower ends is bent outward to form the heel portion (45).   The skylight frame forming member (42) is provided with at least one of an upper reinforcing member (9) crossing the skylight (8) upward and a lower reinforcing member (10) crossing the skylight (8) downward. The driver's seat protection device for a swivel working machine according to claim 1 or 2, characterized in that:   The driver's seat protection frame (24) is erected between the driver's seat (4) and the boom (3), and the front strut (27) and the rear strut (28) to which the side window frame forming member (38) is attached. ) And the roof frame (30) to which the skylight frame forming member (42) is attached together with the upper portions of the front column (27) and the rear column (28). ) And the corner portion (27a) of the front strut (27) and the corner portion (28a) of the rear strut (28) from the intermediate position in the front-rear direction of the roof frame (30). The driver's seat protection device for a turning work machine according to any one of claims 1 to 3, further comprising a reinforcing frame (46) connected to the rear support column (28).

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