JP6808553B2 - Traveling crane device - Google Patents

Description

The present invention relates to a traveling crane device.

As a crane device, for example, as shown in Patent Document 1, there is a jib crane having a cylindrical fixed portion and a swivel portion provided on the fixed portion so as to be swivelable, and a jib is provided on the swivel portion. .. Further, as a traveling crane device, there is a jib crane in which a portion above the fixed portion of Patent Document 1 is provided on, for example, a traveling body traveling on a rail. In such a crane device, a driver's cab is generally provided in the swivel portion, and an operator can perform a swivel operation of the swivel portion, an operation of the crane portion, and a traveling operation of a traveling body in the driver's cab.

In the traveling crane device, a range that is difficult to see from the driver's cab occurs, such as around the traveling body or behind the turning portion. Therefore, in Patent Document 2, an image in such a difficult-to-see range is acquired by the imaging unit, and a signal of this image is sent to a display device in the driver's cab for display output, so that the driver can easily see the range. A traveling crane device has been proposed that enables operation after confirming.

Japanese Unexamined Patent Publication No. 2014-97867 Japanese Unexamined Patent Publication No. 2014-198630

When the video signal is sent from the fixed portion to the driver's cab provided in the swivel portion, it is difficult to send the video signal by wire so as not to hinder the movement of the swivel portion. Further, when a video signal is transmitted by wireless transmission, it is convenient that the transmitting unit and the receiving unit are close to each other so that stable signal transmission can be performed without increasing the strength of radio waves. Based on these facts, the present inventors have studied a configuration in which a video signal is transmitted wirelessly near the boundary between the swivel portion and the fixed portion.

However, in a crane device in which a swivel portion is arranged at a high place, if a transmitting portion or a receiving portion is provided on the outer circumference of a tubular fixed portion, the transmitting portion and the receiving portion are exposed to a strong wind generated at a high place. It has been found that stable signal transmission may be hindered. Further, it has been found that when a transmitting unit or a receiving unit is provided inside the tubular fixed portion, radio waves are diffusely reflected by the inner peripheral wall of the fixed portion, which may hinder stable signal transmission.

An object of the present invention is to enable a traveling crane device having a cab provided in a swivel portion to stably send a signal obtained by imaging from a fixed portion to the cab of the swivel portion.

The traveling crane device of the present invention
With the running part
A fixed portion fixed on the traveling portion and
A swivel portion provided on the fixed portion so as to be swivel,
The driver's cab provided in the turning part and
An imaging unit provided on the traveling unit or the fixed unit, and
A transmitter that transmits a signal from the imaging unit by radio waves,
A receiving unit that receives a signal from the transmitting unit by radio waves,
A display unit provided in the driver's cab and displaying an image based on a signal received by the reception unit, and a display unit.
With
The fixed portion has a tubular body having a space inside, and has a tubular body.
The transmitting portion is supported by the fixed portion and is arranged inside the tubular body.
The receiving portion is supported by the swivel portion and is arranged at a position protruding from the swivel portion to the inside of the tubular body.
The cylinder is provided with a diffuse reflection suppression unit that suppresses diffuse reflection of radio waves inside the cylinder .
The receiving unit has an annular shape centered on the central axis of the cylinder.
The transmitting unit faces at least a part of the receiving unit in the radial direction of the cylinder.
The diffused reflection suppressing unit includes a first diffused reflection suppressing unit that absorbs radio waves.
At least a part of the first diffused reflection suppressing unit is arranged on the side opposite to the section of the receiving unit facing the transmitting unit with the transmitting unit interposed therebetween .
The traveling crane device of another aspect of the present invention is
With the running part
A fixed portion fixed on the traveling portion and
A swivel portion provided on the fixed portion so as to be swivel,
The driver's cab provided in the turning part and
An imaging unit provided on the traveling unit or the fixed unit, and
A transmitter that transmits a signal from the imaging unit by radio waves,
A receiving unit that receives a signal from the transmitting unit by radio waves,
A display unit provided in the driver's cab and displaying an image based on a signal received by the reception unit, and a display unit.
With
The fixed portion has a tubular body having a space inside, and has a tubular body.
The transmitting portion is supported by the fixed portion and is arranged inside the tubular body.
The receiving portion is supported by the swivel portion and is arranged at a position protruding from the swivel portion to the inside of the tubular body.
The cylinder is provided with a diffuse reflection suppression unit that suppresses diffuse reflection of radio waves inside the cylinder.
The receiving unit has an annular shape centered on the central axis of the cylinder.
The transmitting unit faces at least a part of the receiving unit in the radial direction of the cylinder.
The diffused reflection suppressing unit includes a second diffused reflection suppressing unit that absorbs radio waves.
The second diffused reflection suppressing unit is arranged on the side opposite to the transmitting unit with a section of the receiving unit facing the transmitting unit.

According to the present invention, in a traveling crane device in which a driver's cab is provided in a turning section, it is possible to obtain an effect that a signal obtained by imaging can be stably sent from a fixed portion to a driver's cab in the turning section.

It is a figure which shows the traveling crane device of embodiment of this invention. It is a block diagram which shows the structure which sends the surrounding image to the driver's cab. FIG. 3 is a vertical cross-sectional view showing a boundary portion between a fixed portion and a swivel portion of the traveling crane device of FIG. It is a perspective view which shows the support structure of a receiving part. FIG. 3 is a cross-sectional view taken along the line AA of FIG. It is a vertical cross-sectional view which shows the transmitting part, the receiving part and the diffuse reflection suppressing part. It is sectional drawing which shows the transmitting part, the receiving part and the diffuse reflection suppressing part. It is a vertical sectional view (A) and a horizontal sectional view (B) which show the detailed structure of a receiving part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing a traveling crane device according to an embodiment of the present invention. FIG. 2 is a block diagram showing a configuration in which an ambient image is sent to the driver's cab.

The traveling crane device 1 of the present embodiment includes, for example, a traveling unit 10 traveling on the rail R, a fixed portion 20 provided on the traveling portion 10, and a swivel portion 30 provided on the fixed portion 20 so as to be rotatable. And a driver's cab 40 provided in the swivel portion 30, and a jib 45 provided in the swivel portion 30. The fixing portion 20 has a tubular body 20A at least at the upper portion.

The traveling crane device 1 includes a hanging tool t for hanging a load, a wire rope w for hoisting and lowering the hanging tool t, and a drum for winding and sending out the wire rope w (non-standard). (Illustrated) and. The drum is connected to a motor (not shown) or the like, and rotates by the driving force of the motor. The hanging tool t is raised by winding the wire rope w by the drum, and conversely, the hanging tool t is lowered by sending out the wire rope w by the drum. That is, the hanger t, the wire rope w, and the drum constitute a cargo handling section for carrying out the cargo handling work.

The traveling crane device 1 can travel on the rail R by driving the traveling unit 10. The traveling crane device 1 can travel on the rail R and move close to the load to be handled, and also travels on the rail R with the load suspended by the hanger t to load the load. Can be transported.

The traveling crane device 1 can adjust the position of the hanger t by raising and lowering the jib 45. That is, by increasing the angle of the jib 45 from the horizontal plane, the hanger t can be brought closer to the crane body (composed of the traveling portion 10 and the fixing portion 20), and conversely, the angle of the jib 45 from the horizontal plane. By making the size smaller, the hanger t can be kept away from the crane body. Further, the traveling crane device 1 can adjust the angle (angle when viewed in a plan view) of the hanging tool t around the crane main body portion by rotating the turning portion 30 with respect to the fixed portion 20. ..

Workers walk, trailers and transport carts travel in the vicinity of the rail R on which the traveling crane device 1 travels. From the driver's cab 40, it is difficult for the driver to visually see the vicinity of the traveling unit 10, and it is difficult for the driver to check the operator, the trailer, and the like. Therefore, the traveling crane device 1 has an imaging unit 60 for confirming the periphery of the traveling unit 10.

As shown in FIG. 2, the traveling crane device 1 includes one or more imaging units 60, a video signal generation unit 62, a transmission unit 64, a reception unit 66, and a display unit 68. The image pickup unit 60 is provided in the fixed unit 20 or the traveling unit 10, and converts, for example, an image in a range difficult to see from the driver's cab 40 into a signal. The video signal generation unit 62 converts the video signal acquired from one or more imaging units 60 into a video signal of a predetermined format and outputs the video signal to the transmission unit 64 via a cable. The transmitting unit 64 transmits a video signal to the receiving unit 66 by radio waves (wirelessly). The receiving unit 66 receives a video signal from the transmitting unit 64 by radio waves (wirelessly). The video signal received from the receiving unit 66 is sent to the display unit 68. The display unit 68 is provided in the driver's cab 40 so that the operator can operate the traveling crane device 1 while viewing the image, and displays the display unit 68 based on the image signal sent from the receiving unit 66.

An analog signal may be adopted as the video signal. In the case of a digital signal, if the transmission of the video signal becomes unstable due to some influence, the screen of the display unit 68 freezes, and there is no actual change and the screen does not change, or the transmission is unsuccessful. It may be difficult to determine if the screen is stable and stationary. On the other hand, in the case of an analog signal, if the transmission of the video signal becomes unstable due to some influence, the display of the video on the display unit 68 is disturbed (for example, a sandstorm-like video), and the transmission is unstable. The operator can easily recognize that.

<Structure of the boundary between the swivel part and the fixed part>
FIG. 3 is a vertical cross-sectional view showing a boundary portion between the fixed portion and the swivel portion of the traveling crane device of FIG. FIG. 4 is a perspective view showing a support structure of the receiving unit. FIG. 5 is a cross-sectional view taken along the line AA of FIG.

The tubular body 20A has a cylindrical shape, has a space inside, and is configured such that the central axis C1 is the same as the turning central axis of the turning portion 30. As shown in FIG. 3, the boundary portion between the tubular body 20A and the swivel portion 30 includes an upper frame portion 21, a swivel gear 22 fastened to the upper frame portion 21, and a swivel frame that is a part of the swivel portion 30. 31 and a bearing 32 fastened to the swivel frame 31 are provided. Further, a drive shaft 33 and a drive gear 34 connected to the turning motor are provided at the boundary portion.

When the drive shaft 33 and the drive gear 34 are rotationally driven, the bearing 32 swivels with respect to the swivel gear 22, and the swivel portion 30 swivels. With such a structure, the tubular body 20A supports the swivel portion 30 so as to be swivelable. The driver's cab 40 and the jib 45 rotate integrally with the turning portion 30.

A frame member 37 of the swivel portion 30 is further provided at the boundary portion between the tubular body 20A and the swivel portion 30. Further, a structure 24 such as a floor surface and a handrail is provided in the tubular body 20A at the boundary portion.

In the center of the tubular body 20A, a slip ring 29 for transmitting electric power or the like from the fixed portion 20 to the swivel portion 30 is provided in a range extending over the boundary portion between the tubular body 20A and the swivel portion 30.

<Receiver and its fixed structure>
The receiving unit 66 is a long and annular member. As shown in FIG. 3, the receiving unit 66 is supported by the frame member 37 of the swivel unit 30 via an annular frame 52 having a radius equivalent to that of the receiving unit 66 and fixing rods 51 and 53. The radius. The bar 51 may be supported by the skeleton member 37 via another frame 50. The annular frame 52 and the rods 51 and 53 have rigidity, and are connected to each other with rigidity. Further, with such a fixed structure, the annular receiving portion 66 is arranged at a position concentric with the tubular body 20A and at a position protruding from the swivel portion 30 to the inside of the tubular body 20A. As a result, when the swivel portion 30 is swiveled, the annular receiving portion 66 rotates in the tubular body 20A so as to rotate without changing the position of the area occupied by the receiving unit 66.

8A and 8B are views showing a detailed structure of the receiving unit, FIG. 8A is a vertical sectional view, and FIG. 8B is a horizontal sectional view.

As shown in FIG. 8, for example, the receiving unit 66 is configured by providing a plurality of holes 66a for taking in radio waves on one side of the coaxial cable. The receiving unit 66 may have flexibility. Due to the fixing structure of the receiving unit 66 described above, even if the receiving unit 66 has flexibility, the receiving unit 66 can be fixed while maintaining the annular shape.

<Transmitting part, diffused reflection suppressing part and its fixed structure>
FIG. 5 is a cross-sectional view taken along the line AA of FIG. FIG. 6 is a vertical cross-sectional view showing a transmitting unit, a receiving unit, and a diffused reflection suppressing unit. FIG. 7 is a cross-sectional view showing a transmitting unit, a receiving unit, and a diffused reflection suppressing unit.

The transmitting unit 64 is a transmitting antenna that transmits radio waves, and is arranged so as to face a part of a section of the annular receiving unit 66 in the radial direction of the tubular body 20A, as shown in FIGS. 6 and 7. To. Hereinafter, the section of the receiving unit 66 facing the transmitting unit 64 will be referred to as an opposing section SA of the receiving unit 66. The facing section SA of the receiving unit 66 does not mean a fixed section in the long receiving unit 66, but an arbitrary section in the receiving unit 66 is opposed to each other by rotating the turning unit 30. It becomes SA. Here, specifically, each section in which the receiving unit 66 is virtually divided by a predetermined length in the longitudinal direction will be defined and described as a first section, a second section, ... Nth section in order. For example, when the fifth section of the receiving unit 66 and the transmitting unit 64 face each other at a predetermined timing, the fifth section of the receiving unit 66 becomes the facing section SA. On the other hand, when the turning unit 30 rotates in one direction and the receiving unit 66 and the transmitting unit 64 rotate relative to each other, the facing section SA of the receiving unit 66 moves from the fifth section to the fourth section of the receiving unit 66. It changes in order from the 4th section to the 3rd section. On the other hand, when the turning unit 30 rotates in the opposite direction and the receiving unit 66 and the transmitting unit 64 rotate relative to each other, the facing section SA of the receiving unit 66 moves from the fifth section to the sixth section of the receiving unit 66. It changes in order from the 6th section to the 7th section. The transmitting unit 64 is arranged closer to the center of the tubular body 20A than the receiving unit 66.

The traveling crane device 1 further includes a diffused reflection suppressing unit that suppresses diffused reflection of radio waves inside the cylinder 20A. The diffused reflection suppressing unit includes a first diffused reflection suppressing unit 71 and a second diffused reflection suppressing unit 72. The material of the first diffused reflection suppressing section 71 and the second diffused reflection suppressing section 72 is formed by mixing a conductive material or a ferromagnetic material with a base material such as a foamable resin, and causes dielectric loss or magnetic loss of incident radio waves. Absorb at a higher rate. As a material for the first diffused reflection suppressing section 71 and the second diffused reflection suppressing section 72, for example, a model of Shin Nihon Radio Absorber Co., Ltd .: MS-F025K or the like can be applied. The material of the first diffused reflection suppressing section 71 and the second diffused reflection suppressing section 72 may absorb radio waves to the extent that the diffused reflection of the radio waves in the cylinder 20A can be suppressed.

As shown in FIGS. 3, 5 and 7, the first diffused reflection suppressing unit 71 has a box-shaped structure with one surface open, and the transmitting unit 64 is arranged inside the first diffused reflection suppressing unit 71. A part of the first diffused reflection suppression unit 71 is arranged on the side opposite to the facing section SA of the receiving unit 66 with the transmitting unit 64 interposed therebetween, except for the direction of the receiving unit 66 facing the facing section SA. Covers around 64. The transmitting unit 64 is arranged inward from the opening end of the first diffused reflection suppressing unit 71. That is, the open end of the portion of the first diffused reflection suppression unit 71 that covers the transmitting unit 64 is located closer to the facing section SA of the receiving unit 66 than the transmitting unit 64.

The transmitting unit 64 and the first diffused reflection suppressing unit 71 are integrally fixed to the structure 24 of the tubular body 20A via the frames 76 to 78.

The second diffused reflection suppressing unit 72 has a plate shape, and is provided on the side opposite to the transmitting unit 64 with the facing section SA of the receiving unit 66 interposed therebetween. The second diffused reflection suppressing unit 72 may be arranged so that the plate surface is orthogonal to the virtual straight line extending in the radial direction of the tubular body 20A through the transmitting unit 64. As shown in FIGS. 6 and 7, in the circumferential direction (vertical direction of the paper surface in FIG. 7) and the central axis direction (vertical direction of the paper surface in FIG. 6) of the tubular body 20A, the second diffused reflection suppressing unit 72 is the first diffused reflection suppressing unit. Greater than 71. More specifically, among the line segments connecting the transmitting portion 64 and the edge of the opening of the first diffused reflection suppressing portion 71, the line segments L1 to L4 having the widest angle overlap with the second diffused reflection suppressing portion 72. Is provided with a second diffused reflection suppression section 72.

The second diffused reflection suppressing portion 72 is integrally fixed to the structure 24 of the tubular body 20A via the frames 76, 77, 79 and integrally with the first diffused reflection suppressing portion 71. The first diffused reflection suppressing portion 71 and the second diffused reflection suppressing portion 72 may be fixed to the tubular body 20A separately.

In the embodiment, an example is shown in which the transmitting unit 64 is arranged closer to the central axis C1 of the cylinder 20A than the receiving unit 66 along the radial direction of the cylinder 20A. In this case, the first diffused reflection suppressing unit 71 is arranged closer to the central axis C1 of the cylinder 20A than the receiving unit 66, and the second diffused reflection suppressing unit 72 is arranged closer to the outer circumference of the cylinder 20A than the receiving unit 66. To. According to this configuration, even if there is a slip ring 29 that reflects radio waves near the receiving unit 66, diffused reflection of radio waves in the cylinder 20A can be further significantly reduced. However, the arrangement of the transmitting unit 64 and the receiving unit 66 is not limited to the example of the embodiment, and the transmitting unit 64 may be arranged closer to the outer periphery of the tubular body 20A than the receiving unit 66. In this case, the first diffused reflection suppressing unit 71 is arranged closer to the outer circumference of the cylinder 20A than the receiving unit 66, and the second diffused reflection suppressing unit 72 is arranged closer to the central axis C1 of the cylinder 20A than the receiving unit 66. To.

<Action and action>
During the operation of the traveling crane device 1, the imaging unit 60 acquires an image in a range that is difficult to see from the driver's cab 40, and sends the image signal to the transmitting unit 64 via a wire such as an image signal generation unit 62 and a transmission cable. .. The transmission unit 64 transmits a video signal by radio waves. The radio wave output from the transmitting unit 64 is suppressed from spreading by absorption by the first diffused reflection suppressing unit 71, and propagates toward the opposite section SA of the receiving unit 66 with a small spread. A part of the output radio wave is received in the opposite section SA of the receiving unit 66, and the remaining radio wave is propagated to the second diffused reflection suppressing unit 72 and absorbed. Therefore, the radio wave output from the transmitting unit 64 is suppressed from being diffusely reflected by the inner wall surface of the tubular body 20A, the structure 24 in the tubular body 20A, the slip ring 29, or the like, and is stably received by the receiving unit 66. To. The receiving unit 66 sends a video signal received by radio waves to the display unit 68 of the driver's cab 40 via a transmission cable (not shown), and the display unit 68 displays the video acquired by the imaging unit 60.

When the traveling crane device 1 swivels the swivel portion 30, the swivel portion 30 swivels around the central shaft C1 of the cylinder 20A by driving the drive shaft 33 and the drive gear 34. The annular receiving unit 66 also rotates with the turning of the turning unit 30, but the position of the area occupied by the receiving unit 66 does not change, and the section corresponding to the opposite section SA in the receiving unit 66 is included in the receiving unit 66. Only the change does not change the arrangement relationship between the receiving unit 66 and the transmitting unit 64. Therefore, even if the swivel unit 30 is swiveled, transmission and reception of the video signal similar to the above-described embodiment is continued.

As described above, according to the traveling crane device 1 of the present embodiment, since the transmitting unit 64 and the receiving unit 66 are arranged to face each other, it is not necessary to use a high output radio wave to send a video signal. .. Further, according to the present embodiment, the transmitting unit 64 and the receiving unit 66 are arranged in the tubular body 20A. As a result, even when the boundary between the fixed portion 20 and the swivel portion 30 is at a high place, the transmitting unit 64 and the receiving unit 66 are not directly exposed to the strong wind generated at the high place. Further, according to the present embodiment, the first diffused reflection suppressing section 71 and the second diffused reflection suppressing section 72 are provided in the tubular body 20A, and the diffused reflection of radio waves in the tubular body 20A is suppressed. With such a configuration, stable video signal transmission is performed between the transmitting unit 64 and the receiving unit 66, and the video acquired by the imaging unit 60 can be stably displayed on the display unit 68 of the driver's cab 40. it can. Therefore, the operator can operate the traveling crane device 1 after seeing an image in a range that is difficult to see from the driver's cab 40.

Further, according to the traveling crane device 1 of the present embodiment, a part of the first diffused reflection suppressing unit 71 is arranged on the side opposite to the facing section SA of the receiving unit 66 with the transmitting unit 64 interposed therebetween. Therefore, it is possible to significantly suppress the radio wave transmitted from the transmitting unit 64 from propagating to the opposite side of the opposite section SA of the receiving unit 66. Further, according to the traveling crane device 1 of the present embodiment, the second diffused reflection suppressing unit 72 is arranged on the side opposite to the transmitting unit 64 with the facing section SA of the receiving unit 66 interposed therebetween. Therefore, among the radio waves transmitted from the transmitting unit 64, the radio waves propagating beyond the receiving unit 66 can be significantly suppressed from being diffusely reflected in the cylinder 20A.

Further, according to the traveling crane device 1 of the present embodiment, the first diffused reflection suppressing unit 71 is provided so as to surround the transmitting unit 64 except for the direction facing the receiving unit 66, and the transmitting unit 64 suppresses the first diffused reflection. It is arranged inside the first diffused reflection suppression section 71 from the opening of the section 71. With this configuration, it is possible to suppress the radio waves transmitted from the transmitting unit 64 from propagating in unnecessary directions, and to significantly suppress the diffuse reflection of the radio waves in the cylinder 20A. Further, according to the traveling crane device 1 of the present embodiment, the second diffused reflection suppressing portion 72 is configured to be wider in the circumferential direction of the cylinder 20A and the direction along the central axis C1 than the first diffused reflection suppressing portion 71. Will be done. Therefore, it is possible to prevent the radio wave propagated from the transmitting unit 64 through the receiving unit 66 from being separated from the second diffused reflection suppressing unit 72. As a result, it is possible to significantly suppress diffuse reflection of radio waves in the cylinder 20A.

Further, according to the traveling crane device 1 of the present embodiment, the transmitting unit 64 is arranged closer to the central axis C1 of the tubular body 20A than the receiving unit 66. Therefore, it is easy to secure a space for arranging the wide and plate-shaped second diffused reflection suppressing portion 72, and even when the slip ring 29 is arranged in the center of the tubular body 20A, the radio waves are significantly reflected by the slip ring 29. Can be suppressed.

The embodiment of the present invention has been described above. However, the present invention is not limited to the above embodiment. For example, in the above embodiment, the configuration in which the transmitting unit 64 is arranged closer to the central axis C1 of the tubular body 20A than the receiving unit 66 has been described as an example. However, a configuration may be adopted in which the transmitting unit 64 is arranged closer to the central axis C1 of the tubular body 20A than the receiving unit 66. Further, in the above embodiment, the first diffused reflection suppressing section 71 and the second diffused reflection suppressing section 72 are shown as an example of the diffused reflection suppressing section according to the present invention. However, for example, a structure in which a material that absorbs radio waves is attached to the inner wall surface of the tubular body 20A or the surface of another structure may be adopted as the diffused reflection suppressing portion. Further, although an example in which the second diffused reflection suppressing section 72 is formed into a plate shape is shown, the second diffused reflection suppressing section 72 is located above, below, and above and below the annular receiving section 66 except for the side where the transmitting section 64 is arranged. A configuration may be adopted that covers the outer peripheral side (or the inner peripheral side depending on the arrangement of the transmitting portion 64). Further, the second diffused reflection suppressing unit 72 may have a shape bent along the annular receiving unit 66.

Further, in the above embodiment, the configuration in which the transmitting unit 64 is arranged so as to face the receiving unit 66 in the radial direction of the cylinder 20A has been described as an example, but the transmitting unit 64 has at least a part of the receiving unit 66 and the cylinder. A configuration facing the central axis C1 of the body 20A may be adopted. In this case, the arrangement and orientation of the first diffused reflection suppressing unit 71 and the second diffused reflection suppressing unit 72 may be changed according to the directions in which the transmitting unit 64 and the receiving unit 66 face each other. Further, the traveling unit according to the present invention is not limited to the system of traveling on the rail, and may have a configuration of a system capable of freely traveling on the ground. Further, the configuration of the crane according to the present invention is not limited to the jib crane, and various configurations such as a hammer head crane (a crane in which a girder turns) may be adopted. Further, the details shown in the embodiments such as the fixed structure of the transmitting unit 64, the receiving unit 66, the first diffused reflection suppressing unit 71 and the second diffused reflection suppressing unit 72 can be appropriately changed without departing from the spirit of the invention.

1 Traveling crane device 10 Traveling unit 20 Fixed unit 20A Cylinder 30 Swivel unit 40 Driver's cab 45 Jib 50, 52 Frame 51, 53 Bar material 60 Imaging unit 64 Transmitter 66 Receiver 68 Display 71 1st diffused reflection suppression 72 2nd diffused reflection suppression unit 76, 77, 78 frames

Claims (5)

With the running part
A fixed portion fixed on the traveling portion and
A swivel portion provided on the fixed portion so as to be swivel,
The driver's cab provided in the turning part and
An imaging unit provided on the traveling unit or the fixed unit, and
A transmitter that transmits a signal from the imaging unit by radio waves,
A receiving unit that receives a signal from the transmitting unit by radio waves,
A display unit provided in the driver's cab and displaying an image based on a signal received by the reception unit, and a display unit.
With
The fixed portion has a tubular body having a space inside, and has a tubular body.
The transmitting portion is supported by the fixed portion and is arranged inside the tubular body.
The receiving portion is supported by the swivel portion and is arranged at a position protruding from the swivel portion to the inside of the tubular body.
The cylinder is provided with a diffuse reflection suppression unit that suppresses diffuse reflection of radio waves inside the cylinder .
The receiving unit has an annular shape centered on the central axis of the cylinder.
The transmitting unit faces at least a part of the receiving unit in the radial direction of the cylinder.
The diffused reflection suppressing unit includes a first diffused reflection suppressing unit that absorbs radio waves.
At least a part of the first diffused reflection suppression unit is arranged on the side opposite to the section of the receiving unit facing the transmitting unit with the transmitting unit interposed therebetween.
Traveling crane device. The first diffused reflection suppressing unit covers the periphery of the transmitting unit except in the direction in which the transmitting unit faces the receiving unit.
The traveling crane device according to claim 1 . The open end of the portion of the first diffused reflection suppressing portion that covers the transmitting portion is closer to the receiving portion than the transmitting portion.
The traveling crane device according to claim 2 . With the running part
A fixed portion fixed on the traveling portion and
A swivel portion provided on the fixed portion so as to be swivel,
The driver's cab provided in the turning part and
An imaging unit provided on the traveling unit or the fixed unit, and
A transmitter that transmits a signal from the imaging unit by radio waves,
A receiving unit that receives a signal from the transmitting unit by radio waves,
A display unit provided in the driver's cab and displaying an image based on a signal received by the reception unit, and a display unit.
With
The fixed portion has a tubular body having a space inside, and has a tubular body.
The transmitting portion is supported by the fixed portion and is arranged inside the tubular body.
The receiving portion is supported by the swivel portion and is arranged at a position protruding from the swivel portion to the inside of the tubular body.
The cylinder is provided with a diffuse reflection suppression unit that suppresses diffuse reflection of radio waves inside the cylinder.
The receiving unit has an annular shape centered on the central axis of the cylinder.
The transmitting unit faces at least a part of the receiving unit in the radial direction of the cylinder.
The diffused reflection suppressing unit includes a second diffused reflection suppressing unit that absorbs radio waves.
The second diffused reflection suppressing unit is arranged on the side opposite to the transmitting unit with a section of the receiving unit facing the transmitting unit.
Traveling crane device. The diffused reflection suppressing unit includes a second diffused reflection suppressing unit that absorbs radio waves.
The second diffused reflection suppressing unit is arranged on the side opposite to the transmitting unit with a section of the receiving unit facing the transmitting unit.
The second diffused reflection suppressing portion is longer than the first diffused reflection suppressing portion in the circumferential direction of the cylinder.
Traveling crane device according to any one of claims 1 to 3.

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