JP5710563B2 - Work machine - Google Patents

Description

  The present invention relates to a work machine such as a mini excavator provided with a canopy that covers a driver's seat.

  8 is a side view showing a canopy provided in a mini excavator constituting a conventional work machine, FIG. 9 is a side view showing a state in which the canopy shown in FIG. 8 is rotated around a virtual vertical axis, and FIG. FIG. 11 is a side view showing a state in which the canopy shown in FIG. 8 is rotated downward in the vertical plane, and FIG. 11 shows a projected figure of the canopy portion that can be formed as the canopy portion of the canopy shown in FIG. It is a top view of the conventional mini excavator.

  As shown in FIG. 11, a mini excavator cited as an example of a conventional work machine includes a traveling body 51, a revolving body 52 disposed on the traveling body 51, and attached to the revolving body 52 for excavation work or the like. And a working device 53 for performing the above. A driver's seat 54 is provided on the revolving structure 52, and a canopy 55 shown in FIG. 8 is provided so as to cover the driver's seat 54.

  The canopy 55 holds the canopy 60 covering the upper side of the driver's seat 54, a support member 61 that supports the canopy 60, and, as shown in FIG. As shown in FIG. 9, the first rotation mechanism and the second rotation mechanism that holds the first rotation mechanism so as to be rotatable around a virtual vertical axis are provided.

  A first bracket 62 is provided at the lower end of the support member 61. The first bracket 62 is attached to the second bracket 78 so as to be rotatable in a vertical plane around the shaft portion 79. That is, the first rotation mechanism is configured to include the shaft portion 79. This first rotation mechanism is locked and held by a pin (not shown), so that the form shown in FIG. 8 is held, that is, the canopy 60 covers the driver's seat 54, and the above-mentioned pin (not shown) is removed. As shown by an arrow 82 in FIG. 10, the canopy 55, the support member 61, and the first bracket 62 are integrally rotated in the vertical plane.

  As shown in FIGS. 8 and 9, the second rotating mechanism described above includes a base portion 70 attached to the vehicle body, that is, the revolving body 52, and a column portion welded and fixed to the base portion 70 via a bracket 73 or the like. Contains. The column portion is provided with an outer cylinder portion 71 fixed to the base portion 70 and a removable second bracket 78 connected to the first rotation mechanism described above. The second bracket 78 is fixed to the upper end. The inner cylinder portion 72 is formed. The inner cylinder portion 72 can be expanded and contracted with respect to the outer cylinder portion 71 as indicated by an arrow 80 in FIG. 8, and can be rotated about a virtual vertical axis as indicated by an arrow 81 in FIG. Is retained.

  In addition, the inner cylinder portion 72 is locked in a contracted or contracted state with respect to the outer cylinder portion 71, and the inner cylinder portion 72 is not rotated about the virtual vertical axis described above. Is provided with a locking portion for locking to the outer cylinder portion 71. As shown in FIG. 9, the locking portion is formed in the outer tube portion 71 and formed in a plurality of long grooves extending in the vertical direction, that is, the first long groove 74 and the second long groove 75, and the inner tube portion 72. And a plurality of holes (not shown) formed so as to be fitted to the first and second long grooves 74 and 75, and a corresponding first and second long grooves 74 and 75 and a plurality of holes (not shown), respectively. A plurality of inserted pins, that is, a first pin 76 and a second pin 77 are included.

  In such a mini-excavator, the canopy 60 interferes with work and traveling when excavating underground, dismantling indoors, traveling in a place with an obstacle at a low position, traveling for dive-through, etc. In order to prevent this, the canopy 60 is evacuated and retracted.

  That is, the pins 76 and 77 that lock the inner cylindrical portion 72 are once removed, and as shown by the arrow 80 in FIG. 8, for example, the inner cylindrical portion 72 in the expanded state is contracted, and then the arrow 81 in FIG. As shown, the canopy 60, the support member 61, the first bracket 62, the second bracket 78, and the inner cylinder 72 are integrally rotated about a virtual vertical axis, for example, 180 °, and in this state The pins 76 and 77 described above are again inserted into the first and second long grooves 74 and 75 and a hole (not shown), and the inner cylinder 72 is locked to the outer cylinder 71. Next, a pin (not shown) that holds the first bracket 62 with respect to the second bracket 78 is temporarily removed, and as shown by an arrow 82 in FIG. 10, the canopy 60, the support member 61, and the first bracket 62. The first block 62 is locked and held on the second block 78 again by a pin (not shown).

  This type of prior art is disclosed in Patent Document 1.

JP 2002-192950 A

  In the prior art shown in FIGS. 8-11 configured as described above, the first and second pins 76, which lock the inner cylinder part 72 to the outer cylinder part 71 when the canopy part 60 of the canopy 55 is retracted, 77 and the operation of removing and inserting a pin (not shown) that has locked the first bracket 62 to the second bracket 78 are necessary, and the operation of retracting the canopy 60 is complicated. It was.

  Further, when the canopy 55 is rotated and retracted as shown in FIG. 9, a circular rotation area indicated by the projection figure 90 of FIG. . For this reason, when there is an obstacle behind the mini excavator, there is a concern that the canopy 60 interferes with the obstacle. As a result, the place where the canopy 60 can be retracted is restricted.

  The present invention was made from the actual situation in the above-described prior art, and its purpose is to ease the canopy canopy part and to ease restrictions on the place where the canopy part can be withdrawn. It is to provide a working machine that can.

  In order to achieve this object, the present invention includes a vehicle body, a working device attached to the vehicle body, a driver seat provided in the vehicle body, and a canopy that covers the driver seat, and the canopy includes the driver seat. In the working machine having a canopy portion that covers the upper portion of the vehicle, a support member that supports the canopy portion, and a rotation mechanism that holds the support member so as to be rotatable in a direction to retract the canopy portion. Comprises a pivot mechanism that holds the support member so as to be pivotable about a virtual tilt axis, and engages the pivot mechanism so that the support member does not pivot about the virtual tilt axis. It is characterized by having a locking portion for stopping.

  In the present invention configured as described above, when the canopy canopy is retracted from the upper side of the driver's seat, the lock to the turning mechanism by the locking part is released and the canopy is supported via the turning mechanism. The member may be rotated around a virtual tilt axis. That is, the canopy can be easily retracted by one operation of rotating the support member around the virtual tilt axis. Further, the projected figure that can be formed by rotating the canopy part when the canopy part is retracted is an oval shape in which the diameter dimension corresponding to the longitudinal direction of the vehicle body is shorter than the diameter dimension corresponding to the vehicle body width direction. can do. Thereby, the dimension which a canopy part protrudes toward the back from the rear part of a working machine can be restrained small. Therefore, the present invention can reduce the possibility of the canopy part interfering with an obstacle existing behind the work machine, and can ease restrictions on a place where the canopy part can be retracted.

  Further, the present invention is the above invention, further comprising a bracket fixed to the support member, wherein the rotation mechanism is attached to the bracket and is disposed in an inclined manner, and the shaft portion is connected to the virtual portion. And a bearing portion that is rotatably held around the tilt axis.

  Further, the present invention is the above invention, wherein the locking portion is formed in one of the bearing portion and the shaft portion, and extends in the vertical direction, and the bearing portion and the shaft portion. It is characterized by including a plurality of hole portions formed on the other of them and adapted to each of the long grooves, and a plurality of pins inserted into the corresponding long grooves and the hole portions, respectively.

  In the invention described above, the present invention is characterized in that the support member of the canopy is provided with a handle utilized when the support member is rotated.

  Further, the present invention is the above-mentioned invention, wherein a base portion attached to the vehicle body and a base portion are erected, one of which is fixed to the base portion, and the other is provided so as to be detachable from the one. In addition, in a state where the other end is extended with respect to the one of the column portions fixed to the rotating mechanism and the one of the column portions fixed to the base portion, or And a locking portion that locks in a contracted state.

  The present invention provides a rotation mechanism that holds a support member that supports the canopy portion so as to be rotatable about a virtual tilt axis, and a rotation mechanism that prevents the support member from rotating about a virtual tilt axis. Since the locking portion that locks the locking mechanism is provided, the canopy portion can be easily retracted by one rotation operation performed via the rotation mechanism after unlocking the rotation mechanism by the locking portion. In addition, the canopy canopy can be retracted in a shorter time than before, and the upper part of the driver's seat can be made an open space. Further, the present invention can relax the restriction on the place where the canopy can be retracted compared to the conventional case, and can ensure excellent practicality.

It is a side view which shows the mini excavator which comprises one Embodiment of the working machine which concerns on this invention. It is a side view which shows the canopy with which the mini excavator shown in FIG. 1 is equipped. It is a rear view of the canopy shown in FIG. FIG. 2 is a side view of a main part showing a normal state in which the canopy canopy portion is arranged at the upper part of a driver seat in the mini excavator shown in FIG. 1. FIG. 2 is a side view of a main part showing a state where a canopy canopy portion is retracted to the rear of a driver seat in the mini excavator shown in FIG. 1. It is a top view of the mini excavator shown in FIG. 1 which shows the projection figure of the canopy part which can be formed with rotation of the canopy canopy part. It is a side view explaining each installation form of the inclination axis | shaft which forms the virtual center axis | shaft at the time of rotating the supporting member of the canopy with which the mini shovel shown in FIG. 1 is equipped. It is a side view which shows the canopy with which the mini excavator which comprises the conventional working machine is equipped. It is a side view which shows the state which rotated the canopy shown in FIG. 8 around the virtual vertical axis. It is a side view which shows the state which rotated the canopy shown in FIG. 8 in the downward direction in the vertical plane. It is a top view of the conventional mini excavator which shows the projection figure of the canopy part which can be formed with rotation of the canopy part of the canopy shown in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a work machine according to the present invention will be described with reference to the drawings.

  FIG. 1 is a side view showing a mini excavator constituting one embodiment of a work machine according to the present invention.

  The work machine according to the present invention includes, for example, a mini excavator. As shown in FIG. 1, this mini excavator is attached to a traveling body 1, a revolving body 2 disposed on the traveling body 1, and the revolving body 2 so as to be pivotable in the vertical direction. And a working device 3 for performing. The traveling body 1 and the revolving body 2 constitute a vehicle body. A driver's seat 4 is disposed on the revolving structure 2. In addition, a canopy 5 that covers the driver's seat 4 is provided on the revolving structure 2. A counterweight 6 that secures a weight balance is provided at the rear position of the revolving unit 2.

  2 is a side view showing a canopy provided in the mini excavator shown in FIG. 1, and FIG. 3 is a rear view of the canopy shown in FIG.

  As shown in FIGS. 2 and 3, the canopy 5 includes a canopy portion 10 made of, for example, synthetic resin that covers the upper side of the driver's seat 4, and a support member 11 that supports the canopy portion 10. The support member 11 is provided with a handle 11a that is utilized when the support member 11 is rotated. In addition, a rotation mechanism is provided that holds the support member 11 so that the canopy portion 10 can be retracted from the upper side of the driver's seat 4 to the rear. The rotation mechanism includes a virtual tilt shaft, For example, it is composed of a rotation mechanism that is rotatably held around a virtual inclination axis that is inclined by 45 ° with respect to a horizontal plane. In addition, the above-mentioned virtual inclination axis is an inclination axis formed so as to gradually descend from the rear position of the revolving structure 2 toward the front position.

  In addition, the first bracket 12 that is fixed to the lower end portion of the support member 11 is provided, and the above-described rotation mechanism is attached to the first bracket 12 and is arranged in an inclined shape (not shown) and the shaft (not shown). And a bearing portion 13 that holds the portion rotatably about the virtual tilt axis described above. That is, the shaft part and the bearing part 13 (not shown) described above are installed so as to be inclined by 45 ° with respect to the horizontal plane, for example, according to the virtual tilt axis described above.

  In addition, the mini excavator according to the present embodiment includes a locking portion that locks the rotation mechanism described above so that the support member 11 does not rotate around the virtual tilt axis described above. For example, the locking portion is formed in the bearing portion 13 and extends in the vertical direction, that is, the first long groove 14 and the second long groove 15, and the above-described shaft portion (not shown) held by the bearing portion 13. The first and second long holes (not shown) and the corresponding first and second long grooves (14, 15) and the first unillustrated first holes (not shown) formed in the first and second long grooves (14, 15). , A plurality of pins inserted into each of the second holes, that is, the first pin 16 and the second pin 17 are included.

  In addition, the present embodiment includes a base portion 20 attached to the revolving body 2 and a support column portion standing on the base portion 20. The column part is provided, for example, by an outer cylinder part 21 that is welded and fixed to the base part 20 via a bracket 23 or the like, and is detachably attached to the outer cylinder part 21, and the second bracket 30 is fixed to the upper end part by welding. It consists of the combination of the inner cylinder part 22 made. The second bracket 30 is welded and fixed to the bearing portion 13 constituting the rotation mechanism.

  Moreover, this embodiment is provided with the another latching | locking part latched in the state which extended the inner cylinder part 22 with respect to the outer cylinder part 21 of the support | pillar part, or contracted. For example, the locking portion is formed in the outer cylinder portion 21 and formed in the plurality of long grooves extending in the vertical direction, that is, the first long groove 24 and the second long groove 25, and the inner cylinder portion 22. A plurality of holes formed so as to fit in each of the two long grooves 24 and 25, that is, the first hole 26 and the second hole 27, and the corresponding first and second long grooves 24 and 25 and the first and first holes. A plurality of pins inserted into each of the two holes 26 and 27, that is, a first pin 28 and a second pin 29 are included. For example, two combinations of the first hole portion 26 and the second hole portion 27 are provided along the standing direction of the inner cylinder portion 22.

  4 is a side view of a main part showing a normal state in which the canopy canopy portion is arranged above the driver seat in the mini excavator shown in FIG. 1, and FIG. 5 is a rear view of the driver seat of the canopy in the mini excavator shown in FIG. FIG. 6 is a plan view of the mini excavator shown in FIG. 1 showing a projected figure of the canopy portion that can be formed with the rotation of the canopy canopy portion.

  In the mini excavator according to the present embodiment configured as described above, excavation work in the underground, dismantling work indoors, traveling in a place with an obstacle at a low position, traveling for dive-through For example, when the canopy 5 is retracted to the rear of the driver's seat 4, the following operation is performed.

  For example, as shown in FIG. 4, the inner cylinder portion 22 constituting the support portion of the canopy 5 is extended, and the canopy portion 10 is disposed so as to cover the upper side of the driver seat 4. From this state, the first and second pins 28 and 29 that have locked the inner cylindrical portion 22 to the outer cylindrical portion 21 are once removed, and the inner cylindrical portion 22 is lowered or contracted, so that the first and second pins 28 and 29 are removed. Are inserted into the first and second long grooves 24 and 25 of the outer cylinder portion 21 and the corresponding first and second holes 26 and 27 of the inner cylinder portion 22 again. Thereby, the inner cylinder part 22 is locked to the outer cylinder part 21 in a contracted state.

  Next, the first and second pins 16 and 17 that have locked the shaft portion (not shown) of the rotation mechanism to the bearing portion 13 are once removed, and for example, the handle 11a provided on the support member 11 is gripped. 4, the support member 11 is rotated around the virtual tilt axis 18. At this time, the canopy 10 supported by the support member 11 rotates downward using its own weight.

  As shown in FIG. 5, when the canopy portion 10 is arranged in the vertical direction, the first and second pins 16 and 17 are again inserted into the first and second long grooves 14 and 14 of the bearing portion 13. 15 and the first and second holes (not shown) formed in the shaft (not shown). As a result, a shaft portion (not shown) is locked to the bearing portion 13. That is, the canopy 10 is stably held so as not to move.

  In order to return the canopy 10 to the normal position above the driver's seat 4 as shown in FIG. 4 from the state where the canopy 10 is retracted behind the driver's seat 4 as shown in FIG. The operation opposite to that described above may be performed.

  According to the mini excavator according to the present embodiment configured as described above, the canopy 10 can be easily retracted by one operation of rotating the support member 11 around the virtual inclined shaft 18. That is, the canopy 5 canopy 10 can be retracted to the rear of the driver's seat 4 in a short time, and the upper portion of the driver's seat 4 can be made an open space.

  In addition, as shown in FIG. 6, the projected figure 40 that can be formed by turning the canopy 10 when the canopy 10 is retracted is compared with the radial dimension corresponding to the width direction of the vehicle. It can be an ellipse with a corresponding reduced radial dimension. Thereby, the dimension which the canopy part 10 protrudes toward the back from the said mini excavator can be restrained small. Therefore, this embodiment can reduce the possibility that the canopy 10 interferes with an obstacle existing behind the mini excavator, and can relax the restriction on the place where the canopy 10 can be retracted. Thereby, this embodiment can ensure the outstanding practicality.

  In the above embodiment, the virtual tilt shaft 18 that forms the rotation center of the support member 11 and the canopy 10 is set to a tilt shaft that is tilted by 45 ° with respect to the horizontal plane. Thus, the virtual tilt axis 18 is not limited to being set at an angle of 45 ° with respect to the horizontal plane.

  FIG. 7 is a side view for explaining each installation form of the inclined shaft that forms a virtual central axis when the canopy support member provided in the mini excavator shown in FIG. 1 is rotated.

  In FIG. 7, a virtual tilt axis 18A is equivalent to the 45 ° tilt axis 18 described above, and the rear position of the mini-excavator at this time is the rear position 41A shown in FIG. The canopy 5 canopy 10A is kept as close as possible within a range that does not interfere with the rear portion of the mini-excavator.

  However, if the mini excavator provided with the canopy 5, for example, is a slightly larger mini excavator having a rear position 41B that protrudes rearward from the rear position 41A, a virtual tilt axis is shown in FIG. In this way, the inclination axis 18B that forms an angle slightly larger than 45 ° with respect to the horizontal plane may be set. Thereby, the canopy part 10 of the canopy 5 is kept at a position as close as possible within a range that does not interfere with the rear part of the mini excavator having the rear part 41B protruding rearward from the rear part 41A.

  Conversely, for example, when the mini excavator provided with the canopy 5 is a slightly smaller mini excavator having the rear position 41C positioned in front of the rear position 41A, the virtual tilt axis is shown in FIG. As shown in FIG. 5, the inclination axis 18C may be set to form an angle slightly smaller than an angle of 45 ° with respect to the horizontal plane. Thereby, the canopy part 10 of the canopy 5 is kept at a position as close as possible as long as it does not interfere with the rear part of the mini-excavator having the rear position 41C positioned in front of the rear position 41A.

  In the above embodiment, the first and second long grooves 14 and 15 into which the first and second pins 16 and 17 for locking the rotation mechanism are inserted are formed in the bearing portion 13, and the first and second long grooves are formed. 14 and 15, the first and second hole portions (not shown) are formed in the shaft portion (not shown) held by the bearing portion 13, but conversely, the first and second long grooves 14, 15 may be formed in a shaft portion (not shown), and a first and second hole portion (not shown) adapted to the first and second long grooves 14 and 15 may be formed in the bearing portion 13.

  Moreover, in the said embodiment, the 1st, 2nd long grooves 24 and 25 in which the 1st, 2nd pins 28 and 29 which latch a support | pillar part are inserted are formed in the outer cylinder part 21, and the 1st, 2nd long grooves The first and second holes 26 and 27 conforming to 24 and 25 are formed in the inner cylinder part 22, but conversely, the first and second long grooves 24 and 25 are formed in the inner cylinder part 22, You may make it the structure which forms the 1st, 2nd hole parts 26 and 27 which fit the 1st, 2nd long grooves 24 and 25 in the outer cylinder part 21. FIG.

  Moreover, in the said embodiment, the structure which provided the outer cylinder part 21 which comprises a support | pillar part to the base part 20, and provided the inner cylinder part 22 fixed to a rotation mechanism so that insertion / removal with respect to the outer cylinder part 21 was possible. On the contrary, the inner cylinder part 22 is fixed to the base part 20 and the outer cylinder part 21 is fixed to the rotation mechanism. The outer cylinder part 21 is fixed to the inner cylinder part 22. You may make it the structure provided so that attachment or detachment was possible.

2 Revolving body (car body)
DESCRIPTION OF SYMBOLS 3 Work apparatus 4 Driver's seat 5 Canopy 6 Counterweight 10 Canopy part 10A Canopy part 10B Canopy part 10C Canopy part 11 Support member 11a Handle 12 First bracket 13 Bearing part 14 1st long groove 15 2nd long groove 16 1st pin 17 2nd Pin 18 Inclined shaft 18A Inclined shaft 18B Inclined shaft 18C Inclined shaft 20 Base portion 21 Outer tube portion 22 Inner tube portion 23 Bracket 24 First long groove 25 Second long groove 26 First hole portion 27 Second hole portion 28 First pin 29 First pin 29 2 pin 30 2nd bracket 40 projected figure 41A rear position 41B rear position 41C rear position

Claims (5)

A vehicle body, a work device attached to the vehicle body, a driver seat provided in the vehicle body, and a canopy covering the driver seat;
An operation in which the canopy includes a canopy portion that covers the upper side of the driver's seat, a support member that supports the canopy portion, and a rotation mechanism that holds the support member so as to be rotatable in a direction in which the canopy portion is retracted. In the machine
The rotation mechanism includes a rotation mechanism that holds the support member so as to be rotatable about a virtual tilt axis.
A working machine comprising a locking portion that locks the rotation mechanism so that the support member does not rotate around the virtual tilt axis. The work machine according to claim 1,
A bracket fixed to the support member;
The rotating mechanism includes a shaft portion attached to the bracket and arranged in an inclined manner, and a bearing portion that holds the shaft portion so as to be rotatable around the virtual inclined shaft. Working machine. The work machine according to claim 2,
The locking portion is formed in one of the bearing portion and the shaft portion, and is formed in a plurality of long grooves extending in the vertical direction, and is formed in the other of the bearing portion and the shaft portion, and the long groove A work machine comprising: a plurality of holes formed so as to conform to each of the plurality of holes, and a corresponding long groove and a plurality of pins inserted into each of the holes. The work machine according to claim 1,
A working machine, wherein the support member of the canopy is provided with a handle that is utilized when the support member is rotated. In the working machine according to any one of claims 1 to 4,
A base portion attached to the vehicle body, and standing on the base portion, one of which is fixed to the base portion, the other is provided so as to be detachable from the one, and is fixed to the rotating mechanism. A strut portion that is a combination of an outer tube portion and an inner tube portion, and a latch that locks the one of the strut portions fixed to the base portion in a state where the other is extended or contracted. A work machine comprising a stop.

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