JP2008104106A - Antenna housing apparatus for work machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To safely keep a GPS antenna without mounting/demounting it. <P>SOLUTION: An antenna housing apparatus includes: a casing 21 for housing a GPS antenna 10 therein; a cover 22 attached to the casing 21 so as to open/close an opening 21c of the casing 21 and to be freely turned; an actuator 23 which is provided within the casing 21 and extended/contracted vertically: and link members 24, 25 of which lower ends are pin-coupled to the actuator 23 and upper ends are pin-coupled to the cover 22 for converting the extending/contracting motion of the actuator 23 into the rotating action of the cover 22. The cover 22 is bisected, at a central position of the opening 21c, into a first cover portion 22a and a second cover portion 22b, and attached so as to turn the cover portions 22a, 22b separately in two directions when the actuator 23 is shortened, and to open the opening 21c from the central position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an antenna storage device for a work machine equipped with a GPS antenna.

  In recent years, in work machines, as a position measurement system for construction management, for example, as described in Patent Document 1, a GPS antenna that can receive a positioning signal from an artificial satellite on a counterweight of an upper swing body (airframe) Has been carried out. In other words, the tip position (bucket tip position) of the working device is calculated based on the position data obtained by the GPS antenna and the angle data obtained by the position sensor installed on each movable part (boom, arm and bucket) of the working device. Then, the construction status is grasped by comparing the calculated tip position of the working device with preset terrain data or target terrain data.

Since the GPS antenna is highly accurate and expensive, it may be stolen. Therefore, after work, the GPS antenna is removed from the work machine and stored.
JP 2002-310652 A

  However, it is burdensome for the operator to lift and lower the aircraft with the GPS antenna every time work is started / finished, and the expensive GPS antenna may be dropped and damaged. In addition, if a new scaffolding or handrail is installed for attaching / detaching the GPS antenna installed as an option on the counterweight, there will be a problem of cost increase or a problem that the turning radius will increase due to the newly installed scaffolding, etc. Will occur.

  The present invention has been devised in view of such problems, and an object thereof is to provide an antenna storage device for a work machine that can be safely stored without detaching a GPS antenna.

  To achieve the above object, an antenna storage device for a work machine according to claim 1 of the present invention has an opening that opens upward, a casing that stores a GPS antenna therein, and the opening A cover that is pivotably attached to the casing so as to be openable and closable, an actuator that is provided inside the casing and expands and contracts in the vertical direction, and a lower end portion of which is pin-coupled to the actuator and an upper end portion of the actuator. And a link member that converts the expansion / contraction motion of the actuator into the rotational motion of the cover, and the cover is divided into two at the center position of the opening portion and the first cover portion and the first cover portion. When the actuator is contracted, the first cover part and the second cover part are rotated in two hands and the opening is opened from the center position. It is characterized in that attached to so that.

  A work machine antenna storage device according to a second aspect of the present invention is the work machine antenna storage device according to the first aspect, wherein a bolt hole for fixing the casing to the work machine is provided on the bottom surface of the casing. The casing is characterized in that a bolt is screwed into the bolt hole from the inside of the casing and is fixed to the work machine.

According to the antenna storage device for a work machine according to the first aspect of the present invention, the GPS antenna can be stored safely and the theft and mischief of the GPS antenna can be reliably prevented while making it unnecessary to attach and detach the GPS antenna for each work. can do.
That is, at the time of work, the actuator is operated and contracted. Then, the contraction movement of the actuator is converted into the rotation movement of the cover via the link member, and the first cover part and the second cover part are rotated in two hands to open the opening part from the center position of the opening part. . And the GPS antenna arrange | positioned inside the casing will be in the state exposed.

After the work, the actuator is actuated again and extended. Then, the extension movement of the actuator is converted into the rotation movement of the cover via the link member, and, conversely, the first cover part and the second cover part rotate so as to contact each other at the center position, and the opening part Close. And it will be in the state where the GPS antenna arrange | positioned inside the casing was shielded.
Therefore, by rotating the cover by the expansion / contraction operation of the actuator, the opening of the casing for storing the GPS antenna can be opened and closed, and the GPS antenna can be stored or used without being removed from the work machine.

  According to the antenna storage device for a work machine of the present invention as set forth in claim 2, since the opening of the casing is closed by the cover when the GPS antenna is stored, the GPS antenna cannot be removed. Since the bolts that secure the machine to the work machine cannot be accessed, the casing cannot be removed. Therefore, it is possible to reliably prevent the GPS antenna from being stolen or mischievous.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[One Embodiment]
1 to 4 each show an antenna storage device for a work machine according to an embodiment of the present invention. FIG. 1 is a schematic longitudinal sectional view of a state where a GPS antenna is stored, and FIG. 2 uses a GPS antenna. FIG. 3 is a cross-sectional view taken along the line XX of FIG. 1, and FIG. 4 is a perspective view showing an overall image of the hydraulic excavator in which the antenna storage device is installed.

<Configuration>
Here, a hydraulic excavator as a typical example of a work machine will be described.
As shown in FIG. 4, the excavator 1 has a lower traveling body 2, an upper revolving body (airframe) 3 that is pivotably coupled to the lower traveling body 2, and extends forward from the upper revolving body 3. It is comprised from the working apparatus 4 attached to. The upper swing body 3 is provided with a counterweight 5 at the rear end thereof for balancing the weight with the work device 4, and a cab 6 for an operator to ride on the left side of the front part. It is installed.

The upper swing body 3 includes a pair of GPS antennas 10 disposed above the counterweight 5 and a pair of antenna storage devices 20 for storing the pair of GPS antennas 10 in order to measure the position of the excavator 1. Is provided.
The pair of GPS antennas 10 are arranged above the left and right end portions of the counterweight 5 so as to be separated from each other with an interval of at least 1.5 m, preferably 2 m or more in the body width direction. This is because the measurement points need to be separated in order to measure the position of the excavator 1 by the GPS antenna 10. Further, the GPS antenna 10 is arranged approximately 50 cm to 1 m above the counterweight 5 so that the magnetic field does not go out of order due to the influence of the counterweight 5 containing iron.

  In order to attach and store the GPS antenna 10 in such an arrangement, the antenna storage device 20 has a casing 21, a cover 22, an electric hydraulic cylinder (actuator) 23, as shown in FIGS. Link members 24 and 25 are provided. Each of the constituent members 21 to 25 of the antenna storage device 20 is provided for each of the pair of GPS antennas 10.

The casing 21 is a bowl-shaped member that is fixed to the left and right ends of the counterweight 5 and that stores the GPS antenna 10 therein.
Here, the casing 21 includes a first casing portion 21a formed in a substantially cylindrical shape, and a second casing portion 21b that is connected to the upper end of the first casing portion 21a and whose horizontal cross-sectional area increases upward. It is prepared for. A plurality of bolt holes for fixing the casing 21 on the counterweight 5 are provided in the bottom wall of the first casing portion 21a. The casing 21 is fixed to the counterweight 5 by screwing a bolt 31 into the bolt hole from the inside of the casing 21. That is, the head 31 a of the bolt 31 is positioned inside the casing 21.

Moreover, the substantially square-shaped opening part 21c opened toward upper direction is formed in the upper part of the 2nd casing part 21b. Further, a plate-like first bracket 41 extending in the horizontal direction is interposed at a connecting portion between the first casing portion 21a and the second casing portion 21b, and the support member 26 is attached to the first bracket 41. It is attached.
The support member 26 is a member for supporting the GPS antenna 10, and has a pair of leg portions 26a extending upward and a base portion 26b disposed over the upper ends of the pair of leg portions 26a. is doing. The GPS antenna 10 is placed on the base portion 26b via the second bracket 42.

In order to open and close the opening 21c, the cover 22 has a substantially semicircular longitudinal cross section in one direction (in FIG. 4, for convenience, one direction is shown as the body width direction) and is perpendicular to the one direction. 4 is a member in which the longitudinal sectional shape of the direction (similarly, in FIG. 4, the other direction is shown as the front-rear direction of the body) is formed into a substantially square shape.
As shown in FIGS. 1 and 2, the cover 22 is divided into two at a central position in one direction of the opening 21 c to form a first cover portion 22 a and a second cover portion 22 b, and the first cover portion 22a and the second cover portion 22b are respectively a pair of substantially fan-shaped side walls 22a ₁ and 22b _1, and peripheral walls 22a ₂ and 22b ₂ curved so as to connect the arc portions of the pair of side walls 22a ₁ and 22b _1. It is comprised. Further, the first cover portion 22a and the second cover portion 22b can rotate in opposite directions around the rotation axis O with the radial center portion as a rotation center (rotation axis) O, as shown in FIG. As shown in FIG. 2, it is attached to the upper part of the second casing portion 22b.

  Here, the direction of the rotation axis O is the same as the other direction described above, and this direction is hereinafter referred to as an axial direction. The shape of the second casing portion 21b is formed to be large enough to accommodate the first cover portion 22a and the second cover portion 22b therein, and the first cover portion 22a and the second cover portion 22b are in an open state. In this case, it is accommodated in the second casing portion 21b.

  The electrohydraulic cylinder 23 is an actuator for rotating the first cover portion 22a and the second cover portion 22b around the rotation axis O, and includes a cylinder tube (cylinder body) 23a and an inner periphery of the cylinder tube 23a. It has a piston (not shown) that is slidably fitted on the surface and a rod 23b that is integrally fixed to the piston. And the lower end part of the cylinder tube 23a is being fixed to the bottom face of the casing 21, and it has arrange | positioned inside the casing 21 so that the expansion-contraction direction may become an up-down direction. The electrohydraulic cylinder 23 is arranged so that the rotation axis O of the cover 22 is positioned vertically above.

  A third bracket 43 is attached to the tip (upper end) of the rod 23b. As will be described later, the third bracket 43 is a support member for attaching the link members 24 and 25, and has a plate-like base portion 43a extending in the horizontal direction, and both end portions of the base portion 43a (both end portions in the axial direction O). The wall portion 43b is formed with a pin hole, and the direction of the pin hole is the same as the axial direction O of the cover 22. When the electrohydraulic cylinder 23 is extended, the third bracket 43 is moved upward, and when the electrohydraulic cylinder 23 is contracted, the third bracket 43 is moved downward.

Although not particularly shown, a switch for extending and retracting the electric hydraulic cylinder 23 is provided in the cab 6, and the operator operates the switch so that the electric hydraulic cylinder 23 is expanded and contracted.
The link members 24 and 25 are, for example, rod-shaped or elongated plate-shaped members, and connect the respective portions 22a and 22b of the cover 22 and the third bracket 43 with the first pin 32 and the second pin 33, respectively. ing. That is, the lower end of the first bracket 32 is pivotally supported by inserting the first pin 32 through the pin hole of the third bracket 43, and the upper end of the first cover portion 22a and the second cover portion 22b. The second pins 33 are connected to the inner surfaces of the side walls 22a ₁ and 22b ₁ .

The insertion direction of the first pin 32 and the insertion direction of the second pin 33 are arranged so as to be parallel to the axial direction O. When viewed from the axial direction O, the link member 24 that connects the first cover portion 22a and the third bracket 43 and the link member 25 that connects the second cover portion 22b and the third bracket 43 are vertical surfaces. It is attached so as to have a reverse C shape inside.
According to this, when a vertical force is applied to the lower end portions of the link members 24 and 25, the upper end portion of the link member 24 on the first cover portion 22a side and the upper end portion of the link member 25 on the second cover portion 22b side Is a reverse force around the rotation axis O (in FIG. 1, the upper end of the link member 24 is a clockwise force around the rotation axis O, and the upper end of the link member 25 is a counterclockwise force). Comes to work.

<Action and effect>
Since the antenna storage device for the working machine according to the embodiment of the present invention is configured as described above, the following operations and effects are obtained.
The GPS antenna 10 is shielded by the casing 21 and the cover 22 as shown in FIGS.

  Then, at the time of work, the operator operates the switch in the cab 6 to operate the electric hydraulic cylinder 23 and contract the rod 23b of the electric hydraulic cylinder 23 as shown in FIG. Then, according to the contraction of the rod 23b, the third bracket 43 moves downward. The downward movement of the third bracket 43 is transmitted to the cover 22 by the link members 24 and 25, and the respective parts 22a and 22b of the cover 22 are rotated downward about the rotation axis O, and are second-handed at the center position. The opening 21c is opened toward both sides with the center position as a base point. And the GPS antenna 10 arrange | positioned inside the casing 21 will be in the state exposed.

  After the work, the operator operates the switch in the cab 6 again to operate the electrohydraulic cylinder 23 and extend the rod 23b as shown in FIGS. Then, the third bracket 43 moves upward in accordance with the extension of the rod 23b. The upward movement of the third bracket 43 is transmitted to the cover 22 by the link members 24 and 25, and the respective portions 22a and 22b of the cover 22 rotate upward about the rotation axis O to close the opening 21c. Then, the GPS antenna 10 disposed inside the casing 21 is shielded and shielded.

  That is, the first cover portion 22a and the second cover portion 22b, the electric hydraulic cylinder 23, and the link members 24 and 25 form a link mechanism called a so-called crank / slider mechanism. Can be stored without being removed from the excavator 1 or can be used by converting the opening 22c of the casing 21 for storing the GPS antenna 10 into the rotational movement of the cover 22. .

Therefore, it is possible to securely store the GPS antenna 10 and prevent the GPS antenna 10 from being stolen or tampered with, without making it necessary to attach or detach the GPS antenna 10 every work.
Moreover, in the state which has opened the opening part 21c, since the 1st cover part 22a and the 2nd cover part 22b are accommodated in the 2nd casing part 21b, the cover 22 is a worker's view field. There is an advantage that does not interfere.

  Furthermore, since the opening 21c of the casing 21 is closed by the cover 22 when the GPS antenna 10 is stored, the GPS antenna 10 cannot be removed, and the bolt 31 that fixes the casing 21 to the counterweight 5 is accessed. Since the casing 21 cannot be removed, it is possible to more reliably prevent the GPS antenna 10 from being stolen or mischievous.

[Others]
As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various deformation | transformation is possible in the range which does not deviate from the meaning of this invention.
For example, in the above embodiment, the electro-hydraulic cylinder 23 is used as an actuator for extending and contracting, but the type of the actuator is not limited to this, and the extending and contracting movement of the first cover portion 22a and the link member 24 and 25 via Any actuator that can convert the rotational movement of the second cover portion 22b may be used.

  Further, in the above-described embodiment, the pair of antenna storage devices 20 are disposed at the left and right ends on the counterweight 5, but the pair of antenna storage devices 20 may be disposed at appropriate positions on the body 3. That is, the antenna storage device 20 is arranged so that the straight line connecting the pair of GPS antennas 10 is as parallel as possible to the direction orthogonal to the extending direction of the work device 4 (that is, the longitudinal direction of the machine body), and the pair of GPS antennas. Although it is preferable to arrange the antennas 10 apart from each other, the antennas 10 may be arranged at appropriate positions on the body 3 as long as a desired position can be measured.

  Furthermore, although the case where the antenna storage device of the work machine of the present invention is applied to a hydraulic excavator has been described in the above embodiment, the antenna storage device of the work machine of the present invention can be applied to other work machines such as a bulldozer and a crane. It is possible to apply.

It is a figure which shows the antenna storage apparatus of the working machine which concerns on one Embodiment of this invention, Comprising: It is a typical longitudinal cross-sectional view of the state which stored the GPS antenna. It is a figure which shows the antenna storage apparatus of the working machine which concerns on one Embodiment of this invention, Comprising: It is a typical longitudinal cross-sectional view of the state which uses the GPS antenna. It is a figure which shows the state which stored the GPS antenna of the antenna storage apparatus of the working machine which concerns on one Embodiment of this invention, Comprising: It is XX arrow sectional drawing of FIG. It is a perspective view which shows the whole image of the hydraulic shovel in which the antenna storage apparatus of the working machine which concerns on one Embodiment of this invention was installed.

Explanation of symbols

1 Excavator (work machine)
2 Lower traveling body 3 Upper turning body (airframe)
4 Working device 5 Counterweight 6 Cab 10 GPS antenna 20 Antenna storage device 21 Casing 21a First casing portion 21b Second casing portion 21c Opening portion 22 Cover 22a First cover portion 22b Second cover portion 23 Electric hydraulic cylinder (actuator)
23a Cylinder tube (cylinder body)
23b Rod 24, 25 Link member 26 Support member 31 Bolt 32 First pin 33 Second pin 41-43 Bracket O Rotating shaft

Claims (2)

A casing that has an opening that opens upward, and stores a GPS antenna therein;
A cover rotatably attached to the casing so that the opening can be opened and closed;
An actuator provided inside the casing and extending and contracting in the vertical direction;
A lower end portion of which is pin-coupled to the actuator and an upper end portion of which is pin-coupled to the cover, and a link member that converts the expansion and contraction motion of the actuator into the rotational motion of the cover,
The cover is divided into two at the center position of the opening and has a first cover part and a second cover part. When the first cover part and the second cover part contract the actuator An antenna storage device for a work machine, wherein the antenna storage device is mounted so as to rotate in two hands and to open the opening from the central position. Bolt holes for fixing the casing to the work machine are provided on the bottom surface of the casing,
2. The antenna storage device for a work machine according to claim 1, wherein the casing is screwed into the bolt hole from the inside of the casing and fixed to the work machine.

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