JP4088693B2 - Ultra-small turning machine - Google Patents

Description

  The present invention relates to a configuration of an ultra-small turning work machine in which a work attachment is mounted on a boom attached to a swivel so that the work attachment can be offset left and right.

  2. Description of the Related Art Conventionally, there has been known an ultra-small turning work machine in which a work attachment is attached to a boom attached to a swivel, and the work attachment can be decentered left and right. The cabin frame of the cabin configured in the ultra-small turning work machine is provided with a roller guide for sliding the windshield, and the roller guide is configured by press molding.

  As shown in FIG. 9, the cabin frame 111 is formed with a groove 111 a having a concave shape in cross section, and the groove 111 a is configured to enter the inside of the cabin frame 111. The groove 111a is provided with a roller 182 fixed to the float glass 171. The roller 182 slides along the groove 111a as a roller guide, and the windshield 171 is slidable.

Conventionally, a door mounted on a cabin is known as an integral type and a folding type door that is divided at the center. Conventionally, the cabin cooler is disposed on the cabin or is internally provided in the upper portion of the cabin. Conventionally, a windshield configured to be openable / closable is configured to be narrow in order to prevent the windshield from protruding beyond the turning radius.
JP 9-177132 A

  In the above conventional configuration, when the windshield is to be stored under the roof portion of the cabin, the planar shape of the rear portion of the cabin is formed in an arc shape so as to follow the arc of the swivel, so that it is rectangular. The problem was that the front windshield could not be stored. In order to meet this requirement, when the windshield is configured to be narrow, the field of view from the windshield is reduced.

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
The operating part (6) of the swivel base (4) is attached to the side of the first boom (10) so as to be pivotable up and down, and is attached to the tip of the first boom (10) so as to be pivotable in the left-right direction. The second boom (11), the third boom (12) attached to the second boom (11) so as to be rotatable in the left-right direction, and attached to the third boom (12) so as to be rotatable in the vertical direction. Arm (13), a work attachment attached to the tip of the arm (13), and a cabin (7) that covers the operating section (6), and the cabin (7) swivels the swivel base (4). In the ultra-small turning work machine stored within the diameter, a windshield (71) is disposed on the front surface of the cabin (7), a roof portion (7r) is disposed on the upper surface, and the roof portion (7r). It is in accordance with the shape of the swivel deck (4), substantially circular arc on the right rear in the front view If configured, the windshield (71), the cabin (7) and can be stored beneath the roof portion (7r) in the, and the front glass (71) housed below the roof section (7r), a upper right as viewed from the front of the windshield (71) is, in a plan view of the roof portion (7r), in order to a shape not protruding from the substantially arcuate portion of the right rear, from a rectangle to the windshield (71), This is a shape with the upper right corner removed in front view .

Since the present invention is configured as described above, the following effects can be obtained.
The operating part (6) of the swivel base (4) is attached to the side of the first boom (10) so as to be pivotable up and down, and is attached to the tip of the first boom (10) so as to be pivotable in the left-right direction. The second boom (11), the third boom (12) attached to the second boom (11) so as to be rotatable in the left-right direction, and attached to the third boom (12) so as to be rotatable in the vertical direction. Arm (13), a work attachment attached to the tip of the arm (13), and a cabin (7) that covers the operating section (6), and the cabin (7) swivels the swivel base (4). In the ultra-small turning work machine stored within the diameter, a windshield (71) is disposed on the front surface of the cabin (7), a roof portion (7r) is disposed on the upper surface, and the roof portion (7r). It is in accordance with the shape of the swivel deck (4), substantially circular arc to the right rear as viewed from the front If configured, the windshield (71), the cabin (7) and can be stored beneath the roof portion (7r) in the, and the front glass (71) housed below the roof section (7r), a upper right as viewed from the front of the windshield (71) is, in a plan view of the roof portion (7r), in order to a shape not protruding from the substantially arcuate portion of the right rear, from a rectangle to the windshield (71), Since the upper right corner is removed in front view , the following effects can be obtained.

Conventionally, when the windshield is to be stored under the roof of the cabin, the planar shape of the rear part of the cabin is formed in an arc shape so as to follow the arc of the swivel. There was a problem that could not be stored. In order to meet this requirement, when the windshield is configured to be narrow, the field of view from the windshield is reduced.
In the present invention, the windshield (71) is a shape obtained by removing the upper right corner from the rectangle when viewed from the front, and the upper right portion of the windshield (71) is the left rear part in the plan view of the roof portion (7r). Therefore, the storage space of the cabin ceiling part can be utilized to the maximum, and the windshield can be constituted by a single windshield. For this reason, visibility from inside the cabin is improved, and the manufacturing cost of the cabin is reduced. Further, the lateral width of the cabin can be increased, and the comfortability of the cabin is improved.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 is a side view showing an ultra-small turning work machine of the present invention, FIG. 2 is also a rear view, FIG. 3 is a front view showing the configuration of a cabin, FIG. 4 is a side view, FIG. 5 is a plan view, and FIG. FIG. 7 is a plan sectional view showing the configuration of the front column of the cabin, FIG. 8 is a plan view showing the door open / closed state, and FIG. 9 is a plan sectional view showing a conventional cabin frame. FIG.

  The configuration of the ultra-small turning work machine of the present invention will be described. 1 and 2, a swivel base 4 is attached to the upper part of a travel apparatus 1 equipped with a pair of left and right crawler travel apparatuses 2, and a driver's seat 6 is disposed on one side of the upper part of the swivel base 4. The driver's seat 6 is covered with a cabin 7 to constitute a driver 9, and a backhoe device 5 is disposed on the side of the driver 9. A battery 61 and a fuel tank 62 are disposed in front of the operation unit 9, and the battery 61 and the fuel tank 62 are covered with a front cover 63. Further, for example, at the rear end portion of the traveling device 1, the earth discharging plate 3 is attached.

  The backhoe device 5 lifts the first boom 10 as much as possible, and in the state where the arm 13 and the bucket 14 are maximally retracted without being offset left and right (the state shown in FIG. 1), the entire backhoe device 5 is entirely swivel 4. It is configured so that it can be stored within the swivel diameter. The bucket 14 and the operation unit 9 are configured not to interfere with each other in the small turning storage state where the entire backhoe device 5 is stored within the turning diameter of the turntable 4.

  Next, the backhoe device 5 will be described. The backhoe device 5 includes a first boom 10 that is attached to the swivel 4 so as to be rotatable up and down, a second boom 11 that is attached to the tip of the first boom 10 so as to be rotatable in the left-right direction, and the second boom 11. A third boom 12 pivotably attached to the left and right sides, an arm 13 pivotally attached to the third boom 12 and a work attachment attached to the tip of the arm 13. A certain bucket 14 is provided, and the arm 13 and the bucket 14 can be offset in the left-right direction by rotating the second boom 11 in the left-right direction.

  A boom cylinder 29 is interposed between the first boom 10 and the swivel 4, and the first boom 10 can be turned up and down by expansion and contraction of the boom cylinder 29. An arm cylinder 17 is interposed between the arm 13 and the arm 13 so that the arm 13 can be turned up and down by expansion and contraction. A bucket cylinder 48 is interposed between the arm 13 and the bucket 14 so that the bucket cylinder 48 The bucket 48 can be turned up and down by expansion and contraction. A trajectory 66 in FIG. 1 is a trajectory through which the tip of the bucket 14 passes as the boom cylinder 29, the arm cylinder 17, the bucket cylinder 48, and the like extend and contract. And so as not to interfere with each other.

  The lower end of the second boom 11 is connected to the upper end of the first boom 10 and a lower rotating shaft 15 so as to be rotatable left and right. The upper end of the second boom 11 is connected to the third boom by an upper rotating shaft 16. 12 is connected to the second boom 11 and the first boom 10 so that an offset cylinder 31 is interposed. Further, an offset rod 30 is installed between the first boom 10 and the third boom 12, and both end portions of the offset rod 30 are pivotally attached to the first boom 10 and the third boom 12, respectively. The rod 30, the first boom 10, the second boom 11, and the third boom 12 constitute a parallel quadruple link mechanism. And by extending and contracting the offset cylinder 31, the bucket 14 is eccentric with respect to the first boom 10 and offset in the left-right direction. In this case, the first boom in front view or rear view is viewed by the parallel quadruple link mechanism. 10 and the third boom 12, the arm 13, and the bucket 14 are not changed in angle, and are offset while maintaining a parallel state.

  The lower pivot shaft 15 that connects the first boom 10 and the second boom 11 and the upper pivot shaft 16 that connects the second boom 11 and the third boom 12 have respective axis centers OP. The lower rotating shaft 15 is arranged so that the arm 13 direction side of the lower rotating shaft 15 is more than the opposite direction side in the state in which the first boom 10 is lifted to the maximum extent. In the embodiment, the lower rotation shaft 15 is configured such that the front part is positioned higher than the rear part.

  In the backhoe device 5 configured as described above, the bucket 14 raises the first boom 10 to the maximum extent, and in the small turning storage state in which the arm 93 and the bucket 94 are maximally retracted without being offset, the operation unit 9 in a side view is shown. It is configured not to interfere with. Further, in the state where the first boom 10 is lifted to the maximum extent, the arm 13 direction side of the lower rotating shaft 15 is positioned higher than the opposite direction side, so the second boom 11 is centered on the lower rotating shaft 15. When the bucket 14 is rotated and offset to the left and right, the bucket 14 moves from rear to front in a side view.

  Thus, the bucket 14 is configured so as not to interfere with the operation unit 9 in a side view in the small turning storage state. When the bucket 14 is offset in the left-right direction, the bucket 14 is operated. The bucket 14 and the driving unit 9 do not interfere with each other because they do not approach the part 9, and the bucket 14 is offset in either the left or right direction without restricting its operation. Can do it. Thereby, in order to avoid that the driving | operation part 9 and the bucket 14 interfere, it becomes unnecessary to attach a safety device and a control apparatus separately, and the cost reduction and weight reduction of the backhoe apparatus 5 can be achieved.

  In addition, the first boom 10 and the second boom 11 are configured to be inclined rearward in a state in which the first boom 10 is lifted to the maximum. The amount of forward protrusion of the third boom 12, the arm 13, and the bucket 14 to be connected is reduced. Furthermore, the upright angle of the second boom 11 with respect to the ground is configured to be larger than the upright angle of the first boom 10 with the first boom fully lifted.

  Thus, in the state which raised the first boom 10 to the maximum, while configuring so that the 1st boom 10 and the 2nd boom 11 may become the attitude | position inclined backward, the standing angle of the 2nd boom 11 with respect to the ground is By configuring the first boom 10 to be larger than the standing angle, it is possible to reduce the amount of projection of the backhoe device 5 forward and backward, and to reduce the turning radius of the backhoe device 5. It has become.

  The configuration of the cabin 7 will be described with reference to FIGS. The cabin 7 is disposed on the swivel base 4 and has a shape that does not protrude outward from the swivel radius of the swivel base 4. A driver's seat 6 is disposed in the cabin 7, and an operator can sit on the driver's seat 6 and work in the cabin 7. The cabin 7 is composed of a roof portion 7r, front struts 7f and 7f, side struts 7s and rear struts 7b. 4 is fixed on the top and supports the roof portion 7r at the upper end.

  A windshield 71 is provided on the front surface of the cabin 7 so that an operator can visually recognize the front through the windshield 71 from the driver's seat. The windshield 71 has a rectangular shape with the upper right corner removed in front view, and is disposed between the front columns 7f and 7f. An arm 7a is pivotally supported on the roof portion 7r, and a front end of the arm 7a is fixed to a handle 81. The handle 81 is configured to be able to open and close the windshield 71 by moving the handle 81 upward on the windshield 71.

  A front corner glass 72 is disposed at the upper part of the front surface of the cabin 7, and the lower part of the front corner glass 72 is formed along the upper part of the front glass 71. The lower right portion of the front corner glass 72 extends downward from the lower left portion of the front corner glass 72, and is configured to compensate for the invisible portion due to the front glass 71. The front corner glass 72 extends to the roof portion 7r of the cabin 7, and is configured to obtain a field of view above the roof portion 7r.

  Next, the configuration of the front column 7f of the cabin 7 will be described. As shown in FIG. 7, the front support column 7f is formed of a deformed frame, and a step for inserting a guide roller 82 described later is formed on the inner side surface portion. A holding member 74 is fixed to the front surface of the front column 7f by welding, and a guide roller 82 can be disposed in a recess formed by the holding member 74 and a step provided on the front column 7f. ing. The guide roller 82 is pivotally supported by a windshield frame 73 held by the windshield 71, and slides in a recess formed by steps provided on the holding member 74 and the front column 7f. It is configured freely. A seal member 82 is attached to the inner peripheral edge of the holding member 74, and the seal member 82 is in close contact with the windshield 82 when the windshield 71 is closed. . In this way, rainwater and dust are prevented from entering the recesses formed by the steps provided in the holding member 74 and the front support column 7f.

  In the above configuration, the front strut 7f is constituted by a deformed pipe provided with a step, the holding member 74 is fixed to the front strut 7f, and the guide roller 82 is provided by the step provided on the holding member 74 and the front strut 7f. Therefore, the front strut 7f can be easily configured, and the cost for manufacturing the front strut 7f can be reduced. Further, since the holding member 82 is fixed from the front surface of the front column 7f, the holding member 82 can be fixed to the front column 7f by an easy operation, and the operation of configuring the cabin 7 becomes easy. The manufacturing cost can be reduced. Further, since the front support column 7f is configured as described above, the portion where the guide roller 82 slides is maintained while maintaining the strength of the front support column 7f without increasing the width of the front support column 7f in the left-right direction. Can be configured. For this reason, it is not necessary to reduce the width of the windshield 71.

  Next, the configuration of the door 91 attached to the cabin 7 will be described. The door 91 is disposed between the front column 7f and the side column 7s outside the cabin 7, and the rear end of the door 91 is connected to a hinge fixed to the side column 7s. When the door 91 is opened and closed, the door 91 is configured to be rotatable about a hinge fixed to the side column 7s. By opening the door 91, an operator can get in and out of the cabin 7. The door 91 is divided into a front part 91 a and a rear part 91 b, and the front part 91 a and the rear part 91 b are connected by a hinge disposed in the center part of the door 91. The hinge 91 is configured so that the central portion of the door 91 can be bent.

  An elastic body 93 is disposed inside the hinge portion of the door 91, and ends of the elastic body 93 are connected to the front portion 91a and the rear portion 91b, respectively. In this configuration, since the elastic body 93 is disposed inside the door 91, the elastic body 93 has the front portion 91a and the rear portion 91b of the door 91 centered on the hinge connecting the front portion 91a and the rear portion 91b. It is energized in the direction to open outward. Further, the shape of the door 91 in plan view in the natural state is configured to be along the curved surface of the swivel base 4 in plan view. When the door 91 is opened and locked to the rear side surface of the cabin 7, the door 91 does not protrude outwardly from the turning radius of the turntable 4 along the curve of the turntable 4. The door 91 is held within the turning radius and is held along the rear side of the cabin 7. Further, when the door 91 is closed, the front end of the front portion 91a of the door 91 is locked to the rear stepped portion of the front column 7f, and the elastic body 93 is compressed, so that the cabin 7 It protrudes outward from a straight line connecting the front column 7f and the side column 7s on the side of the door 91, and is configured in a shape along the side surface of the swivel base 4.

  Since the door 91 is configured as described above, a space can be provided outside the driver's seat 6 in the cabin 7 with the door 91 closed, and the space near the driver's seat 6 in the cabin 7 can be widened. it can. Thereby, the working space in the cabin 7 of the worker can be enlarged. By opening the door 91 and locking it to the rear side surface of the cabin 7, the door 91 is held in a shape along the outer side surface of the swivel base 4, and the turning radius is not increased by the door 91. For this reason, the cabin 7 can be configured compactly.

  Next, the configuration of the roof portion 7r of the cabin 7 will be described. The air conditioner unit 100 is disposed on the roof portion 7r, and the upper surface of the portion of the roof portion 7r where the air conditioner unit 100 is disposed is formed in a raised shape. The roof portion 7r is configured such that only the arrangement portion of the air conditioner unit 100 protrudes upward. That is, the arrangement space of the air conditioner unit 100 can be secured in the roof portion 7r, and the space in the roof portion 7r can be used effectively. As a result, the roof portion 7r is configured to be compact, and the overall height of the cabin 7 in a state where the air conditioner unit 100 is arranged can be reduced. Further, since the roof portion 7r is configured as described above, the strength of the roof portion 7r is increased by the projecting portion of the roof portion 7r, and the number of reinforcing members that prevent twisting and distortion of the roof portion 7r can be reduced. Thus, the roof portion 7r can be easily configured, and the manufacturing cost of the roof portion 7r is reduced.

Next, the configuration of the windshield 71 will be described. The windshield 71 has a pull-up structure as described above, and is configured to be housed in the cabin 7 below the roof portion 7r. As shown in FIG. 5, the roof portion 7 r of the cabin 7 has a substantially arcuate left rear portion (right rear portion in front view) in the rear view of the roof portion 7 r, and is disposed below the cabin 7. The shape of the swivel 4 is adjusted. Thereby, the turning radius of the operation part 9 is not increased by the cabin 7. Since the windshield 71 is housed below the roof portion 7r, the windshield 71 is configured so as not to protrude from the roof portion 7r when the windshield 71 is housed below the roof portion 7r. That is, as shown in FIG. 3, the upper right portion of the windshield 71 is configured to follow the shape of the right rear portion of the roof portion 7r as viewed in plan.

  Because of this configuration, it is possible to configure the windshield 71 that can make maximum use of the storage space of the roof portion 7r of the cabin 7, and it is possible to enlarge the visual field that is visible through the windshield 71 in the cabin 7. Further, since the windshield 71 is configured with an easy configuration, the manufacturing cost of the windshield 71 can be reduced. Furthermore, since the above configuration is adopted, the width of the windshield 71 can be increased, and the comfortability in the cabin 7 is improved.

  Next, the configuration of the front corner glass 72 will be described. The front corner glass 72 is disposed on the front upper portion of the cabin 7 and on the roof portion 7r, and is configured so as to be able to secure a field of view of an upper portion and an upper oblique direction of an operator sitting on the driver's seat. The lower part of the portion of the front corner glass 72 disposed on the front surface of the cabin 7 is configured along the upper end of the front glass 71 described above, and the lower right corner of the front corner glass 72 in the front view is shown in FIG. As shown in FIG. 3, it extends downward.

  As a result, the portion that cannot be seen through the windshield 71 can be supplemented by the lower portion of the front corner glass 72, and the cabin can be accommodated even when the windshield 71 can be stored in the roof portion 7r of the cabin 7. The front field of view of 7 is not reduced. For this reason, the working environment of the operator in the cabin 7 can be improved, and workability and comfort in the cabin 7 are improved.

It is a side view which shows the ultra small turning working machine of this invention. Similarly it is a rear view. It is a front view which shows the structure of a cabin. It is a side view similarly. It is also a plan view. It is a side view which shows the accommodation structure of a windshield. It is a plane sectional view showing the composition of the front column of the cabin. It is a top view which shows the open / close state of a door. It is a plane sectional view showing the conventional cabin frame.

Explanation of symbols

O (center of the lower rotation shaft) P (center of the upper rotation shaft) 1 traveling device 4 swivel base 9 operation unit 7 cabin 7f front column 7s side column 71 front glass 72 front corner glass 91 door 100 air Conditioner unit

Claims (1)

A first boom that is pivotably mounted on the lateral side of the operating unit of the swivel base, a second boom that is pivotally mounted on the distal end of the first boom, and a left-right direction on the second boom A third boom pivotably attached to the arm, an arm pivotably attached to the third boom, a work attachment attached to the tip of the arm, and a cabin covering the operating section. In the ultra-small turning work machine in which the cabin is stored within the turning diameter of the turntable, a windshield is provided on the front surface of the cabin, and a roof portion is provided on the upper surface. When the right rear part is configured in a substantially arc shape in front view according to the shape of the base, the windshield can be stored under the roof part in the cabin, and the windshield is stored under the roof part. , Shape upper right as viewed from the front of Ntogarasu is, in a plan view of the roof portion, in order to a shape not protruding from the substantially arcuate portion of the right rear of the front glass from a rectangle to remove corners of the upper right in the front view An ultra-small turning machine characterized by

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