JP2008302795A - Seat structure of working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat structure of a working machine capable of easily performing a visual confirmation in the rear. <P>SOLUTION: The seat structure of the present invention is equipped with a seat cushion 12 for an operator to sit on, a seat back 13 for supporting the back of the operator, and a support mechanism 14. The support mechanism 14 movably supports the seat back 13 in the lateral direction with respect to the seat cushion 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a seat structure of a work machine.

In a working machine such as a bulldozer, an operation may be performed while viewing the back. For this reason, a seat structure in which the entire seat portion including the seat cushion and the seat back is rotatably arranged has been conventionally provided. In this seat structure, a rotation support mechanism that rotatably supports the seat portion about an axis extending in the vertical direction is provided, and an operator performs a rear view by rotating the entire seat portion to face backward. be able to.
JP-A-52-37325

  However, since the seat structure as described above is a structure that integrally rotates both the seat cushion and the seat back, a relatively large operating force is required. In particular, in the seated state, it is difficult for the operator to apply force. Therefore, it is difficult to rotate the entire seat, and it is difficult to visually check the back.

  The subject of this invention is providing the seat structure of the working machine which can perform back visual observation easily.

  A seat structure for a work machine according to a first aspect includes a seat cushion for an operator to sit on, a seat back for supporting the operator's back, and a support mechanism. The support mechanism supports the seat back so as to be movable in the lateral direction with respect to the seat cushion.

  In the seat structure of this working machine, the operator can perform the rearward visual observation by moving the seat back laterally with respect to the seat cushion. Further, at this time, since the entire seat portion is not moved but only the seat back is moved, the seat back can be moved with a small operating force. For this reason, in the seat structure of this working machine, it is possible to easily perform the backward visual inspection.

  The seat structure of the work machine according to the second invention is the seat structure of the work machine according to the first invention, and the support mechanism supports the seat back so as to be movable along a locus convexly convex backward.

  In the seat structure of this working machine, the seat back moves along a locus curved convexly rearward. For this reason, the protrusion distance to the side of the seat back when performing the backward viewing can be reduced.

  The seat structure of the work machine according to the third invention is the seat structure of the work machine of the first invention or the second invention, and the support mechanism has a fixing mechanism for fixing the seat back to a desired position.

  In the seat structure of the working machine, the seat back can be fixed at a desired position by the fixing mechanism. For this reason, the operation of the work machine in a state where the rear is visually observed can be facilitated.

  A seat structure for a work machine according to a fourth aspect of the present invention includes a seat cushion for an operator to sit on, a seat back for supporting the operator's back, and a support mechanism. The support mechanism supports the seat back so as to be rotatable about an axis extending in the front-rear direction.

  In the seat structure of this working machine, the operator can move the upper portion of the seat back in the lateral direction by rotating the seat back about an axis extending in the front-rear direction. Thereby, back visual observation can be performed. At this time, not the entire seat is moved, but only the seat back is moved, so that the seat back can be moved with a small operating force. For this reason, in the seat structure of this working machine, it is possible to easily perform the backward visual inspection.

  In the seat structure of the working machine according to the present invention, the seat back can be moved with a small operating force, and therefore, the rear view can be easily performed.

<Configuration>
FIG. 1 shows a work machine 100 employing a sheet structure according to an embodiment of the present invention. This work machine 100 is a bulldozer, and includes a traveling device 102 that travels by driving a crawler belt 101 and a vehicle main body 103 placed on the traveling device 102. A first work machine 105 having a blade 104 is provided at the front part of the vehicle main body 103, and a second work machine 107 having a ripper 106 is provided at the rear part of the vehicle main body 103. A driver's cab 108 is placed on the vehicle body 103, and a cockpit 3 having the seat structure shown in FIG.

  The cockpit 3 includes a mounting table 6, a movable console table 11, a slide mechanism 9, and a seat unit 4.

  The mounting table 6 is fixed to the floor surface 33 of the cockpit 3 and is a box-shaped member in which an air conditioner and the like are housed. The seat portion 4 is placed on the placement table 6 via the movable console table 11 and the slide mechanism 9.

  The movable console base 11 is a member on which the seat unit 4 is placed via the slide mechanism 9. Mounted on the movable console base 11 is a console 19 provided with an operation unit such as a driving operation lever necessary for running the work machine 100 and operating the first work machine 105 and the second work machine 107.

  The slide mechanism 9 is a mechanism that makes it possible to adjust the front-rear position of the seat portion 4. The slide mechanism 9 is provided below the seat portion 4, and is provided between the seat portion 4 and the movable console base 11. The slide mechanism 9 is fixedly provided to the movable console base 11 and supports the seat portion 4 so as to be movable in the front-rear direction. The operator operates the second operating member 10 to slide the seat portion 4 into a release state in which the seat portion 4 can be moved in the front-rear direction and a lock state in which the seat portion 4 is locked at a desired position along the front-rear direction. 9 can be switched.

  As shown in FIGS. 3 and 4, the seat portion 4 includes a seat cushion 12 for an operator to sit on, a seat back 13 for supporting the operator's back, and a support mechanism 14. FIG. 3 is a top view of the sheet portion 4, and FIG. 4 is a side view of the sheet portion 4.

  The support mechanism 14 is a mechanism for supporting the seat back 13 movably in the lateral direction with respect to the seat cushion 12. In addition, the horizontal direction here means the left-right direction in the front view of the seat part 4. In particular, the support mechanism 14 is a mechanism for moving the seat portion 4 in the lateral direction, whereas the slide mechanism 9 is a mechanism for moving the seat portion 4 in the front-rear direction. The support mechanism 14 includes a rail member 15, guide members 16 a and 16 b, and a fixing mechanism 17.

  The rail member 15 is disposed behind the seat cushion 12 and is connected to a frame 18 (see FIG. 4) of the seat cushion 12 by a connecting member 20. The rail member 15 is a pipe-like member extending in the lateral direction, and has an arcuate shape that curves backwardly.

  The guide members 16 a and 16 b are members for moving the seat back 13 along the rail member 15. As shown in FIG. 5, the guide members 16 a and 16 b are disposed below the seat back 13 and are connected to the frame 30 of the seat back 13 by connecting members 21 and 22. FIG. 5 is a front view of the seat back 13 and the guide members 16a and 16b. In the seat portion 4, a pair of guide members 16a and 16b are provided apart in the lateral direction, and through holes 23 and 24 penetrating in the lateral direction are formed in the respective guide members 16a and 16b. The guide members 16a and 16b are slidably locked with respect to the rail member 15 when the rail member 15 is inserted into the through holes 23 and 24. As described above, since the rail member 15 has a shape that is convexly convex backward, the seatback 13 is convexly convex backward as the guide members 16a and 16b slide on the rail member 15. It moves along the locus (see arrow A1 in FIG. 3).

  The fixing mechanism 17 is a mechanism for fixing the seat back 13 at a desired position along the rail member 15. As shown in FIG. 6, the fixing mechanism 17 includes a lock member 25, an urging member 26, and an operation member 27. The lock member 25 is rotatably attached to a connecting member 22 connected to the seat back 13. The lock member 25 can restrict the movement of the seat back 13 by engaging with a plurality of grooves (not shown) provided in the rail member 15 along the axial direction. The urging member 26 is, for example, a coil spring, and urges the locking member 25 in a direction in which the locking member 25 is locked in the groove of the rail member 15. The operation member 27 is connected to the lock member 25, and is provided so that the lock member 25 rotates when the operation member 27 is operated.

<Adjustment of seating position>
In the seat structure of the work machine 100, the operator can adjust the position of the seat portion 4 in the front-rear direction by moving the movable console base 11 and the seat portion 4 with respect to the mounting table 6.

  Further, the operator can move the seat back 13 laterally with respect to the seat cushion 12 by the support mechanism 14. In this case, as shown in FIG. 3, the seat back 13 moves along an arcuate locus (see arrow A <b> 1) that extends in the horizontal direction and curves backward, and the seat back 13 rotates around the seat cushion 12. To adjust the position.

  In the cockpit 3, it is possible to adjust the position of the height of the seat cushion 12 and the inclination angle of the seat back 13 in the front-rear direction by operating an adjustment lever (not shown).

<Features>
In the seat structure of the work machine 100, the seat back 13 can be moved in the lateral direction with respect to the seat cushion 12 when it is necessary to perform an operation while visually observing the rear as in a ripping operation, for example. At this time, since only the seat back 13 can be moved without moving the seat cushion 12 or the movable console base 11, the seat back 13 can be moved with a light operating force. Thereby, back visual observation can be performed easily.

<Other embodiments>
(A)
In the above embodiment, the support mechanism 14 supports the seat back 13 so as to be movable in the lateral direction. However, as shown in FIG. 7, the seat back 13 is supported so as to be rotatable about an axis AX extending in the front-rear direction. A supporting mechanism 28 may be provided. With this support mechanism 28, the upper portion of the seat back 13 can be swung left and right in a front view (see arrow A2). FIG. 7 is a front view of the seat portion 4.

  Also in this case, since only the seat back 13 can be moved without moving the seat cushion 12 and the movable console base 11, the seat back 13 can be moved with a light operating force.

(B)
In the above-described embodiment, the support mechanism 14 supports the seat back 13 so that the seat back 13 can move along a locus convexly curved rearward. However, as shown in FIG. A movement mechanism 29 that supports the seat back 13 may be provided so as to be movable along a linear trajectory extending in the direction (see arrow A3). FIG. 8 is a top view of the sheet portion 4.

  Also in this case, since only the seat back 13 can be moved without moving the seat cushion 12 and the movable console base 11, the seat back 13 can be moved with a light operating force. However, from the viewpoint of reducing the lateral protrusion distance of the seat back 13 when the rear view is performed, a structure like the support mechanism 14 of the above embodiment is desirable.

(C)
The structure of the support mechanism in the present invention is not limited to the one described above, and can be changed without departing from the scope of the present invention. For example, in the above embodiment, the rail member 15 is disposed below the seat back 13, but may be disposed behind the seat back 13. In this case, the guide members 16 a and 16 b are provided on the back surface of the seat back 13.

  INDUSTRIAL APPLICABILITY The present invention has an effect capable of easily performing rearward visual observation, and is useful as a seat structure for work machines.

The external appearance perspective view of a working machine. Front view of the cockpit. The top view of a sheet | seat part. The side view of a sheet | seat part. The front view of a seat back. The figure which shows a fixed structure. The figure which shows the support structure which concerns on other embodiment. The figure which shows the support structure which concerns on other embodiment.

Explanation of symbols

12 Seat cushion 13 Seat back 14, 28, 29 Support mechanism 17 Fixing mechanism 100 Work machine

Claims (4)

A seat cushion for the operator to sit on;
A seat back to support the back of the operator;
A support mechanism for supporting the seat back movably in a lateral direction with respect to the seat cushion;
Work machine seat structure comprising: The support mechanism supports the seat back so as to be movable along a locus convexly convex backward.
The seat structure of the working machine according to claim 1. The support mechanism includes a fixing mechanism that fixes the seat back to a desired position.
The seat structure of the working machine according to claim 1 or 2. A seat cushion for the operator to sit on;
A seat back to support the back of the operator;
A support mechanism for rotatably supporting the seat back around an axis extending in the front-rear direction;
Work machine seat structure comprising:

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