JP6999512B2 - Turning work vehicle - Google Patents

Description

The present invention relates to a turning work vehicle.

Patent Document 1 describes a hydraulic excavator capable of detecting the position coordinates of an airframe by a GPS antenna. The GPS antenna is installed on the bonnet that covers the engine, but the installation space is not necessarily secured on the bonnet. For example, in a rear small turning type hydraulic excavator, since the seat mount is arranged above the engine, it is not possible to install the GPS antenna on the bonnet. In such a case, it is preferable to install the GPS antenna on a roof without a shield from the viewpoint of ensuring the reception level of the antenna.

However, if a GPS antenna is installed on the roof of a hydraulic excavator, it may cause inconvenience when it is loaded on a truck or the like for transportation. FIG. 6 shows the height HT of the hydraulic excavator 10 from the ground during transportation (hereinafter referred to as the height during transportation), which includes the body height HS of the hydraulic excavator 10 as a load and a truck or the like. It is calculated as the total with the loading platform height HC. The upper limit of the height HT during transportation is set by the traffic regulations, and it is necessary to keep it within the predetermined height limit. Therefore, if the height HT during transportation exceeds the height limit due to the installation of the GPS antenna, the GPS antenna must be removed before transportation.

Usually, the GPS antenna is installed via a mounting member having a stay. If the height during transportation exceeds the height limit due to the stay, it is necessary to remove the mounting member together with the GPS antenna. However, the GPS antenna is supposed to be removed when not in use and can be easily attached to and detached from the mounting member, whereas the mounting member is firmly fixed because it is supposed to be always mounted. Therefore, the work of removing the mounting member from the roof was very complicated. This applies not only to GPS antennas, but also to other rooftop installations that are similarly installed on the roof.

Patent Document 2 describes a hydraulic excavator in which an antenna is attached to a reinforcing material provided at a joint portion between a side beam of a cabin and a rear pillar. The antenna is configured to be able to face downward via a spherical rotating member. However, this is premised on a rod-shaped antenna such as a radio antenna, and is not applicable to a GPS antenna. Even if it can be applied, there is a risk that accurate coordinate detection will not be possible due to the unstable mounting structure. Of course, it is a structure for mounting the antenna on the side wall of the cabin, and does not disclose a method for installing the antenna on the roof.

Japanese Unexamined Patent Publication No. 2002-181538. International Publication No. 2016/0433344

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a turning work vehicle that can deal with a simple operation even if the height limit is exceeded by an object installed on the roof such as an antenna.

The turning work vehicle according to the present invention includes a support fixed to the roof above the driver's seat and a mounting member for installing a rooftop installation object on the roof, and the mounting member is on the roof. It has a stay to which an installation object is attached and a base attached to the support, and the posture of the attachment member is such that the tip of the stay is attached by rotation of the base around an axis along the horizontal direction. It is possible to change between an upward posture facing upward and a downward posture facing the tip of the stay downward, and the support has a first fixing portion for fixing the mounting member in the upward posture, and the above. It has a second fixing portion for fixing the mounting member in a downward posture.

In this turning work platform, the posture of the mounting member for installing the object to be installed on the roof can be changed to the upward posture and the downward posture as described above. The mounting member in the upward posture is fixed at the first fixing portion of the support and is used when installing the installation object on the roof. The mounting member in the downward posture is fixed at the second fixing portion of the support, and the tip portion of the stay is directed downward. By placing the mounting member in the downward position, the stay and the objects installed on the roof do not protrude significantly upward, so it is easy even if the height limit is exceeded by the objects installed on the roof, such as when transporting a turning work vehicle. It can be dealt with by work.

An example of the rooftop installation is a GNSS (Global Navigation Satellite System) antenna. The roof is convenient for ensuring the reception level of the antenna because there is no obstruction around it, and is suitable as an installation space for the GNSS antenna. On the other hand, although height restrictions due to traffic regulations are a problem, it can be dealt with by simple work by changing the posture of the mounting member as described above. Examples of the support include a roof guard for protecting the roof.

It is preferable that the support is configured by a frame, and the second fixing portion is configured so that the stay can be arranged in the space partitioned by the frame. Since the support is composed of a frame, the space partitioned by the frame can be used as a space for arranging the stays of the mounting members in the downward posture.

The second fixing portion may be set outside the plan view of the roof. As a result, even when it is difficult to secure a space for arranging the stay between the roof and the support, the mounting member can be changed to the downward posture without any particular problem. It is also convenient when the mounting member is placed in a downward position without removing the installation object on the roof.

When the engine is arranged at the rear of the upper swing body and the seat mount supporting the driver's seat is arranged above the engine, it is difficult to provide an installation space on the bonnet covering the engine. Therefore, it is particularly useful to install the on-roof installation on the roof and to deal with the case where the height limit is exceeded by a simple operation.

Left side view showing an example of a turning work platform Top view showing the turning work vehicle of FIG. Perspective view showing the roof guard Perspective view showing the mounting member in the upward posture Perspective view showing the mounting member in the downward posture A diagram schematically showing how a hydraulic excavator is transported.

An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the turning work vehicle 1 of the present embodiment includes a lower traveling body 2, an upper turning body 3, and a working machine 4. The turning work vehicle 1 is configured as a shovel (backhoe) having a so-called boom swing function that swings the working machine 4 left and right with respect to the upper turning body 3, but is not limited thereto. Generally, the boom swing function is installed in a mini excavator (small hydraulic excavator) that requires workability in a narrow space.

The lower traveling body 2 is driven by receiving power from the engine 30 to drive or turn the turning work vehicle 1. The lower traveling body 2 includes a pair of left and right crawlers 21 and 21 and a traveling motor 22 for driving them. Further, the lower traveling body 2 includes a pair of blade arms 23, 23, a blade 24 as a soil removal plate extending in the left-right direction between the tips thereof, and an actuator for rotating the blade 24 up and down. A certain blade cylinder 25 is provided.

The upper swivel body 3 is provided so as to be swivelable above the lower traveling body 2. A swivel table 31 that rotatably supports the upper swivel body 3 is provided between the pair of crawlers 21 and 21, and a swivel motor (not shown) drives the swivel table to drive the upper swivel body 3. Turn. The upper swivel body 3 is formed in a substantially disk shape in a plan view that can be swiveled within the lateral width of the lower traveling body 2 (the distance between the outer edge of the crawler 21 on the left side and the outer edge of the crawler 21 on the right side). .. An engine 30, a counterweight 32, and the like are arranged on the upper swing body 3.

The work machine 4 is driven by receiving power from the engine 30, and excavates earth and sand according to the operation of the control unit 5. The work machine 4 includes a boom 41, an arm 42, a bucket 43 which is an attachment for excavation, and an actuator for driving them (specifically, a boom cylinder 41c, an arm cylinder 42c, a bucket cylinder 43c, which will be described later, and a bucket cylinder 43c. It has a swing cylinder 45). The working machine 4 swings in conjunction with the horizontal rotation of the boom bracket 41b, and moves horizontally relative to the upper swivel body 3.

The boom 41 extends in the vertical direction from the base end portion supported by the boom bracket 41b, and is bent in a boomerang shape in a side view. The boom 41 is attached to the boom bracket 41b so as to be able to rotate up and down (rotate back and forth). The base end portion of the boom 41 is supported so as to be rotatable up and down about the pivot pin 41a. A boom cylinder 41c that can be expanded and contracted is provided between the boom bracket 41b and the middle portion of the boom 41. The vertical rotation of the boom 41 with respect to the boom bracket 41b operates according to the expansion and contraction of the boom cylinder 41c.

The boom bracket 41b is attached to the front end portion of the upper swing body 3 so as to be horizontally rotatable (swing) via the stay 33. The boom bracket 41b is supported so as to be horizontally rotatable about a pivot pin 33a provided on the stay 33. A swing cylinder 45 that expands and contracts in the front-rear direction is provided between the upper swing body 3 and the boom bracket 41b. The horizontal rotation of the boom bracket 41b operates according to the expansion and contraction of the swing cylinder 45.

The arm 42 is attached to the boom 41 so as to be able to rotate up and down (rotate back and forth). The base end portion of the arm 42 is supported so as to be rotatable up and down about the pivot pin 42a. An arm cylinder 42c that can be expanded and contracted is provided between the middle portion of the boom 41 and the base end portion of the arm 42. The vertical rotation of the arm 42 with respect to the boom 41 operates according to the expansion and contraction of the arm cylinder 42c.

The bucket 43 is attached to the arm 42 so as to be vertically rotatable. The base end portion of the bucket 43 is supported so as to be freely rotated up and down (rotated back and forth) about the pivot pin 43a. A bucket link 44 that transmits a driving force to the bucket 43 is interposed between the tip of the arm 42 and the bucket 43. A bucket cylinder 43c that can be expanded and contracted is provided between the bucket link 44 and the base end portion of the arm 42. The vertical rotation of the bucket 43 with respect to the arm 42 operates according to the expansion and contraction of the bucket cylinder 43c.

The control unit 5 is provided above the upper swivel body 3 and is surrounded by the cabin 50. The control unit 5 is equipped with a driver's seat 51 for the operator to sit on, an operation device 52 for the operator to operate, a display device (not shown) for displaying various information, and the like. By operating the operation device 52 while sitting in the driver's seat 51, the operator can run, turn, operate the work machine 4, and the like. The driver's seat 51 is supported by the seat mount 53. The driver's seat 51, the operation device 52, the display device, and the seat mount 53 are all arranged inside the cabin 50.

The turning work vehicle 1 of the present embodiment includes two GNSS antennas 6A and 6B (hereinafter, these are collectively referred to as "antenna 6"). The antenna 6A is arranged on the same horizontal plane as the antenna 6B. The antenna 6 is, for example, a GPS (Global Positioning System) antenna, but is not limited thereto. For example, the position of the end portion of the bucket 43 can be detected based on the position coordinates detected by the antenna 6 and the detection results of various sensors mounted on the turning work platform 1. This enables highly accurate control, which can be useful for automating work and ensuring the safety of the surrounding area.

As shown in FIG. 1, in this turning work vehicle 1, the engine 30 is arranged at the rear of the upper turning body 3 and a seat mount that supports the driver's seat 51, similar to a general rear small turning type hydraulic excavator. Since the 53 is arranged above the engine 30, it is difficult to secure an installation space for installing the antenna 6 on the bonnet covering the engine 30. On the other hand, there is no shield around the roof (that is, the roof of the cabin 50) 50r above the driver's seat 51, which is convenient for ensuring the reception level of the antenna 6. Therefore, in the present embodiment, the antenna 6 is installed on the roof 50r.

A roof guard 7 as shown in FIG. 3 is attached to the roof 50r of the cabin 50. The roof guard 7 is a structure for protecting the roof 50r of the cabin 50, and prevents the cabin 50 from being damaged by a falling object from above. The roof guard 7 is fixed to the roof 50r by a plurality of bolts 73. As will be described later, the roof guard 7 functions as a support for supporting the antenna 6. Although the roof 50r is provided with a water gradient of front low and rear height (see FIG. 1), the roof guard 7 itself is arranged along the horizontal direction. This is convenient for arranging the base 82, which will be described later, horizontally, and for mounting the antenna 6 vertically.

The turning work platform 1 includes a roof guard 7 as a support fixed to the roof 50r above the driver's seat 51, and a mounting member 8 for installing an antenna 6 (an example of an installation on the roof) on the roof 50r. And. The antenna 6 is installed on the roof 50r via the roof guard 7 and the mounting member 8. As shown in FIG. 4, the mounting member 8 has a stay 81 to which the antenna 6 is mounted and a base 82 mounted on the roof guard 7. The base 82 is attached to the roof guard 7 via a hinge 83, and is configured to be rotatable around an axis along the horizontal direction.

The lower part of the antenna 6 is formed in a cylindrical shape, and the antenna 6 is attached to the stay 81 by covering the stay 81 with the clamp member 61 (see FIG. 1). The lower portion of the antenna 6 is split at at least one position in the circumferential direction, and the diameter can be reduced according to the tightening of the clamp member 61. Since the antenna 6 is expensive, it is expected to be removed when not in use, such as during transportation, and can be relatively easily attached and detached via the operation of the clamp member 61. On the other hand, it is assumed that the mounting member 8 is always mounted, and relatively complicated work is required to attach / detach it.

Therefore, in this turning work vehicle 1, the posture of the mounting member 8 is an upward posture in which the tip end portion of the stay 81 is directed upward as shown in FIG. 4 due to the rotation of the base 82 around the axis along the horizontal direction. As shown in FIG. 5, the stay 81 can be changed to a downward posture with the tip end facing downward. The upward posture is used when the antenna 6 is installed on the roof 50r, and the downward posture is used during transportation or the like. The roof guard 7 has a first fixing portion 71 for fixing the mounting member 8 in an upward posture, and a second fixing portion 72 for fixing the mounting member 8 in a downward posture. The first fixing portion 71 and the second fixing portion 72 are provided adjacent to each other.

As shown in FIG. 4, when the mounting member 8 is placed in the upward posture, the antenna 6 mounted on the stay 81 is in a state of being mounted on the roof 50r. Further, by setting the mounting member 8 in the downward posture as shown in FIG. 5, the stay 81 (and the antenna 6) does not protrude significantly upward. Therefore, when the turning work vehicle 1 is loaded on a loading platform such as a truck and transported on the road, if the height limit is exceeded by the antenna 6 or the stay 81, it is possible to deal with it by a simple operation of rotating the base 82. Therefore, it can be kept within the predetermined height limit stipulated by the traffic regulations.

For example, when the body height of the turning work vehicle 1 required as the height to the upper end of the roof guard 7 is 2700 mm and the loading platform height of the truck (low-floor vehicle) is 1000 mm, the calculation is performed without considering the deflection. The height during transportation is 3700 mm (see FIG. 6). Therefore, when the height limit stipulated by the traffic regulations is 3800 mm, if the stay 81 protrudes beyond 100 mm from the upper end of the roof guard 7, the height limit cannot be satisfied even if the antenna 6 is removed. However, the work of removing the mounting member 8 is complicated. However, if the mounting member 8 is placed in a downward posture by rotating the base 82, the height can be kept within a predetermined height limit, which can be dealt with by a simple operation.

The stay 81 is erected on a plate-shaped base 82. The stay 81 is fixed to the base 82 by welding or the like. In the present embodiment, the stay 81 is formed of a hollow strut, but the present invention is not limited to this, and a solid strut may be used. The mounting member 8 has a first support member 84 that supports the base 82 in an upward posture, and a second support member 85 that supports the base 82 in a downward posture. The first support member 84 is arranged in the first fixing portion 71 of the roof guard 7, and the second support member 85 is arranged in the second fixing portion 72 of the roof guard 7. The first and second support members 84 and 85 are each formed in a plate shape.

A bolt hole 82h through which a bolt 86 is inserted is formed in the base 82. The base 82 lying horizontally on the first fixing portion 71 is supported from below by the first support member 84. The first support member 84 is formed with a bolt hole 84h at a position facing the bolt hole 82h. By tightening nuts (not shown) to the bolts 86 inserted through the bolt holes 82h and 84h, the mounting member 8 is fixed in an upward posture as shown in FIG. The antenna 6 attached to the stay 81 can accurately detect the position coordinates without causing a position shift due to vibration or the like.

The base 82 lying horizontally on the second fixing portion 72 is supported from below by the second supporting member 85. The second support member 85 is arranged on the same horizontal plane as the first support member 84, and the base 82 can rotate within a range of 180 degrees. The second support member 85 is formed with a bolt hole 85h at a position facing the bolt hole 82h. By tightening nuts (not shown) to the bolts 86 inserted through the bolt holes 82h and 85h, the mounting member 8 is fixed in a downward posture as shown in FIG. Therefore, the posture of the mounting member 8 is stable even during transportation. In the downward posture, the stay 81 is arranged in the space between the upper end of the roof guard 7 and the roof 50r, and does not protrude from the upper end of the roof guard 7.

In the present embodiment, as shown in FIG. 3, the roof guard 7 which is a support is configured by the frame body 70, and the second fixing portion 72 can arrange the stay 81 in the space partitioned by the frame body 70. It is configured as follows. The frame body 70 is formed in a grid pattern by a combination of the frame material 70a extending in the front-rear direction and the frame material 70b extending in the left-right direction. Although the roof guard 7 covers the skylight 50w provided at the front portion of the roof 50r (see FIG. 2), since it is composed of the frame body 70, daylighting is secured. The support is not limited to the one made of such a frame body 70, and may be made of, for example, a box body.

The installation location of the antenna 6B is configured in the same manner as the installation location of the antenna 6A shown in FIG. However, at the installation location of the antenna 6A, both the first fixing portion 71 and the second fixing portion 72 are set on the roof 50r, whereas at the installation location of the antenna 6B, as shown in FIGS. The first fixing portion 71 is set on the roof 50r (more specifically, the outer edge portion of the roof 50r), while the second fixing portion 72 is set outside the plan view of the roof 50r. The roof guard 7 has a portion protruding outward from the side edge of the roof 50r, and that portion is configured as a second fixing portion 72. As a result, even when it is difficult to secure a space for arranging the stay 81 between the upper end of the roof guard 7 and the roof 50r, the mounting member 8 can be changed to the downward posture without any particular problem.

Further, when the second fixing portion 72 is set to the outside of the plan view of the roof 50r in this way, the base 82 is rotated with the antenna 6B attached to the stay 81, and the attachment member 8 is placed in an upward posture. It is possible to change from to the downward posture. Although this embodiment is not intended for such usage, when the base 82 is rotated without removing the antenna 6B, a second fixing portion 72 is formed so that the antenna 6B does not interfere with the roof guard 7. The shape and size of the constituent members (frame members 70a and 70b) of the roof guard 7 may be appropriately deformed.

In the present embodiment, an example in which the GNSS antenna 6 as an object to be installed on the roof is installed on the roof 50r is shown, but the present invention is not limited to this. Examples of the rooftop installation object other than the antenna include a prism, a laser receiver, a rotating lamp, and the like used in a total station.

In the present embodiment, an example in which the roof guard 7 functions as a support for supporting the antenna 6 is shown, but the present invention is not limited to this. Further, the support is not limited to the one provided over the entire area of the roof 50r like the roof guard 7 described above, and the support is locally provided with respect to the roof 50r, for example, the corner of the roof 50r where the antenna 6 is installed. It may be provided only in the part.

In the present embodiment, an example in which the cabin 50 that surrounds the control unit 5 is provided is shown, but instead of this, a canopy that covers the control unit 5 from above may be provided. In such a case, the above configuration is applied in order to install the on-roof installation on the roof of the canopy above the driver's seat.

The present invention is not limited to the above-described embodiment, and various improvements and changes can be made without departing from the spirit of the present invention.

1 Swivel work platform 2 Lower traveling body 3 Upper swivel body 4 Working machine 5 Maneuvering unit 6 Antenna (an example of an object installed on the roof)
7 Roof guard (an example of a support)
8 Mounting member 30 Engine 50 Cabin 50r Roof 51 Driver's seat 53 Seat mount 70 Frame 81 Stay 82 Base

Claims (6)

It is provided with a support fixed to the roof above the driver's seat and a mounting member for installing an on-roof installation on the roof.
The mounting member has a stay on which the rooftop installation is mounted and a base mounted on the support.
The posture of the mounting member is an upward posture in which the tip of the stay is directed upward and a downward posture in which the tip of the stay is directed downward due to the rotation of the base around the axis along the horizontal direction. Can be changed to
A turning work vehicle in which the support has a first fixing portion for fixing the mounting member in an upward posture and a second fixing portion for fixing the mounting member in a downward posture. The turning work platform according to claim 1, wherein the object installed on the roof is a GNSS antenna. The turning work platform according to claim 1 or 2, wherein the support is a roof guard for protecting the roof. The support is composed of a frame, and the support is formed of a frame.
The turning work vehicle according to any one of claims 1 to 3, wherein the second fixing portion is configured so that the stay can be arranged in a space partitioned by the frame body. The turning work vehicle according to any one of claims 1 to 4, wherein the second fixing portion is set outside the plan view of the roof. The turning work vehicle according to any one of claims 1 to 5, wherein an engine is arranged at the rear of the upper turning body, and a seat mount for supporting the driver's seat is arranged above the engine.

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