Crane and wearable terminal for crane-related operation

Abstract

To provide a crane capable of performing a load transportation operation with high reliability.SOLUTION: A crane (1) comprises a structure (10) capable of lifting a load, and an outward-facing display unit (40) attached to the structure and outputting information relating to a crane operation externally from the structure in a form that includes text information at least partially.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a wearable terminal for use in a crane and in work around a crane. [Background technology]

[0002] Patent Document 1 describes a technique in which a maintenance worker acquires status information of a mobile crane using a mobile terminal. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2019 / 146760 Summary of the Invention [Problem to be solved by the invention]

[0004] Crane operations for transporting loads require workers to perform tasks outside the crane, such as slinging the load, checking the slinging status before and after lifting off the ground, and guiding the load before it touches the ground. Because workers often perform tasks using their hands, it is difficult for them to perform these tasks while obtaining crane information using a mobile terminal as shown in Patent Document 1. On the other hand, workers performing tasks outside the crane work in cooperation with the crane operator, so it was considered desirable for them to perform the above tasks after grasping specific status information of the crane.

[0005] The present invention aims to provide a wearable terminal for a crane or for work around a crane that makes it easier for workers around a crane to grasp information related to the work of the crane. [Means for solving the problem]

[0006] The crane according to the present invention comprises: A structure capable of suspending a load; An outward display unit that is attached to the structure and outputs information regarding the crane operation toward the outside of the structure in a manner that includes at least a portion of character information; Equipped with.

[0007] The wearable terminal for crane peripheral work according to the present invention comprises: The device has a display unit that outputs information relating to crane operation, at least a portion of which includes text information, and a mounting unit that can be mounted on the human body. Effect of the Invention

[0008] According to the present invention, workers around the crane can easily grasp information related to the operation of the crane, thereby achieving highly reliable load transportation operations. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing a crane according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing the operation cabin side of the crane in FIG. [Diagram 3] 2A and 2B are a front view and a side view showing the body of the crane in FIG. 1. [Figure 4] 1A and 1B are image diagrams showing a first display example (A), (B) and a second display example (C) of an outward display section. [Diagram 5] FIG. 4 is an image diagram showing a display example of the main body display unit. [Figure 6] 13A and 13B are image diagrams showing a third display example (A) and (B) of the outward display section. [Figure 7] 13A and 13B are image diagrams showing a fourth display example (A) and (B) of the outward display section. [Figure 8] FIG. 11 is a block diagram showing a display control configuration of a crane according to a second embodiment of the present invention. [Figure 9] FIG. 11 is a perspective view showing a crane according to a third embodiment of the present invention. [Figure 10] FIG. 11 is a block diagram showing a crane according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0011] (Embodiment 1) Fig. 1 is a perspective view showing a crane according to a first embodiment of the present invention. Fig. 2 is a perspective view showing the operation room side of the crane in Fig. 1. Fig. 3 is a front view (A) and a side view (B) showing the body of the crane in Fig. 1.

[0012] The crane 1 of the first embodiment is a self-propelled crane, more specifically, a crawler crane. The crane 1 includes a structure 10 capable of hoisting a load, and an outward display unit 40 that outputs information about the crane operation to the outside of the structure 10.

[0013] The structure 10 includes a machine body 10A and a boom 13 that is supported by the machine body 10A and rises and falls. The machine body 10A is equipped with a travelling lower running body 11 and an upper rotating body 12 that is rotatably supported by the lower running body 11. The upper rotating body 12 is provided with a mast 15 connected to the boom 13 via a pendant member 14, winches 16a to 16c that wind up and pay out the wire ropes W1 to W3, an operation room (also called a cab) 17 where an operator performs operation, and a counterweight 21 that is a weight for balancing the load of a suspended load.

[0014] The operation room 17 is provided with a seat (not shown) on which the operator sits, operation control parts (operation levers, operation pedals, etc.) (not shown) operated by the operator, and a main body display unit 19 (see Figures 2 and 3) on which information related to crane operation is displayed. The main body display unit 19 is a display device (e.g., a liquid crystal display, an organic EL (electro-luminescence) display, etc.) capable of displaying images and characters. The main body display unit 19 is disposed forward of the seat in the operation room 17 with the display screen facing backward or diagonally backward. The main body display unit 19 outputs display information to the operator in the operation room 17.

[0015] The control room 17 is disposed at the front of the upper rotating body 12. Here, the front side refers to the side of the tip of the lowered boom from the center of rotation of the rotating body. In this embodiment, there are no components in front of the control room 17 other than the display device, which is the main display unit 19. Transparent windows are provided on the front, top, left and right sides of the control room 17, and an operator in the control room 17 can visually check the conditions of the left, right, front and above the machine body 10A through the transparent windows.

[0016] The crane 1 further includes a main hoisting gear 31 suspended from the boom 13 via a wire rope W1, and an auxiliary hoisting gear 32 suspended from the boom 13 via a wire rope W2. Note that it is not essential to have two hoisting gears, and the crane 1 may have only one hoisting gear. The main hoisting gear 31 and the auxiliary hoisting gear 32 may be simply referred to as hoisting gears.

[0017] The outward display unit 40 is a device that outputs information related to crane work toward the outside of the structure 10 in a form that includes text information at least in part. Specifically, the outward display unit 40 is a display device (e.g., a liquid crystal display, an organic EL (electro-luminescence) display, etc.) that can display images and text. Note that output toward the outside of the structure 10 includes not only a display device that is disposed outside the structure 10, but also a display device that is disposed inside the structure 10 and the screen of the outward display unit 40 faces the outside of the structure 10. For example, as in the third embodiment described later, the outward display unit 40 is disposed inside the operation room 17 of the structure 10, and the screen of the outward display unit 40 faces the transparent window side of the operation room 17, not the driver's seat side. In addition, the screen of the outward-facing display unit 40 facing the transparent window of the operation room 17 means that the screen of the outward-facing display unit 40 faces the transparent window at an angle of -45 degrees to 45 degrees and the screen of the outward-facing display unit 40 can be seen from outside the operation room 17.

[0018] The outward display unit 40 is disposed outside the operation room 17, on the front side of the operation room 17 and below the center. The outward display unit 40 may be disposed such that its lower end is supported by the lower front surface of the operation room 17.

[0019] In the operation room 17, the operator can operate the crane 1 while visually checking the situation to the left and right, forward, and above. Therefore, according to the above-mentioned arrangement of the outward display unit 40, the operator's visibility through the window can be reduced from being hindered. In addition, the front side of the operation room 17 is relatively less subject to shaking and vibration. This is because the outward display unit 40 is arranged at a position away from the machine rooms 18a and 18b that house the drive unit that drives the crane 1, and therefore can be arranged at a position away from the source of shaking and vibration. Therefore, the above-mentioned arrangement can stably support the outward display unit 40. Furthermore, the front side of the operation room 17 is less likely to be a passage for the worker when the worker moves on the crane 1. Therefore, according to the above-mentioned arrangement, the outward display unit 40 can be reduced from getting in the way of the worker moving on the crane 1. Furthermore, the front side of the operation room 17 does not have other components of the crane 1 to ensure visibility from the operation room, and space is secured. Therefore, a space for installing the tilt mechanism 41 described later can be easily secured, and the tilt angle of the outward display unit 40 can be adjusted in a wide range. In addition, the boom 13 has a limit to its angle of elevation, and the boom 13 is usually limited so that the boom 13 does not reach a position where it is raised at a predetermined angle or more with respect to the ground. Therefore, no load is suspended just in front of the operation room 17, and no worker performs slinging work in this vicinity. For these reasons, the space just in front of the operation room 17 is a space that workers rarely enter. Therefore, the support structure of the outward display unit 40 can be simplified. Furthermore, the angle of the front side of the operation room 17 is fixed even if the elevation angle of the boom 13 changes. Therefore, compared to the case where the outward display unit 40 is disposed on the boom 13, the above-mentioned arrangement allows the outward display unit 40 to output display information with a stable screen tilt. In addition, the area below the center at the front side of the operation room 17 is higher than the ground due to the lower traveling body 11, and is at a height that is easy to see for workers on the ground. Therefore, the above arrangement makes it possible to provide display information that is easily visible to workers outside. Furthermore, the front side of the operation room 17 is located in a recessed position in the machine body 10A when the crane 1 is disassembled and transported.Therefore, with the above-mentioned arrangement, the outward display unit 40 does not affect the maximum vertical and horizontal dimensions of the body 10A during transportation. Therefore, even if the dimensions of the body 10A during transportation are almost the restricted dimensions, the body 10A can be transported with the outward display unit 40 attached.

[0020] The outward-facing display unit 40 is provided with a sunshade 42 that protrudes forward from the periphery of the display screen. The sunshade 42 reduces reflection of sunlight and the like on the screen of the outward-facing display unit 40, improving the visibility of the outward-facing display unit 40 outdoors during the day. The material of the sunshade 42 may be a shielding material that blocks sunlight, or a material that reduces the amount of sunlight that passes through, such as frosted glass.

[0021] More specifically, the outward-facing display unit 40 is disposed so that the display screen faces the front of the operation room 17. With such a configuration, the worker can check the display content of the outward-facing display unit 40 with high visibility from the point where the load is lifted from the ground or the point where the suspended load is grounded.

[0022] The outward display unit 40 is supported on the upper rotating body 12 via a tilt mechanism 41 capable of changing the tilt angle. Therefore, the tilt mechanism 41 can adjust the tilt angle of the outward display unit 40 so as to further improve the visibility of the worker.

[0023] <Cargo transportation using a crane> The crane 1 can transport a load from a first location to a second location by lifting the load at a first location, moving the load to a different second location, and then lowering the load at the second location. In the following, an example of transporting a load using the main lifting device 31 will be shown, but the same applies when the auxiliary lifting device 32 is used. The lifting and lowering of a load is achieved by winding or unwinding the wire rope W1 to raise or lower the main lifting device 31 engaged with the load. The movement of a load from above the first location to above the second location is achieved by changing the angle of the boom 13 and rotating the upper rotating body 12 while the load is lifted. When lifting a load, the lifting of the load from the ground is called "ground lifting," and when lowering the load, the touching of the load to the ground is called "ground touching." In addition, the radius of the circle that is the trajectory of the load when the upper rotating body 12 rotates with the angle of the boom 13 fixed is called the "working radius." The more the boom 13 is reclined, the larger the working radius becomes, and the more the boom 13 is raised, the smaller the working radius becomes. Therefore, if the working radius is large, the rated total load becomes small, and if the working radius is small, the rated total load becomes large. The rated total load means the maximum load that can safely hoist a load. Also, if the weight of the load is small, the maximum working radius becomes large, and if the weight of the load is heavy, the maximum working radius becomes small. The maximum working radius means the maximum working radius at which a load can be safely hoisted.

[0024] In conjunction with the work of transporting the load, outside the crane 1, a worker other than the operator performs the work of slinging the load, the work of checking the slinging state before and after the lifting, the work of guiding the load before the ground is touched, etc. In the slinging work, the worker uses his own hands to fasten the sling rope engaged with the hook of the main lifting gear 31 to the load, etc., to engage the load with the main lifting gear 31. In the work of checking the slinging state, the worker communicates with the operator and switches between a state in which the wire rope W1 is loaded and a state in which the wire rope W1 is slack, while checking whether the slinging state is good or bad, such as whether the center of gravity of the load and the center of gravity of the main lifting gear 31 are in agreement within a specified range, and if the state is not good, the worker adjusts the slinging state with his own hands. In the guiding work, the worker fine-tunes the position of the load when it touches the ground and removes the sling.

[0025] The above-mentioned slinging work, confirmation work, and guidance work are performed in front of the operation room 17 (which may be said to be in front of the upper rotating body 12). Therefore, the above-mentioned outward display unit 40 can provide display information to the worker performing the work.

[0026] <Examples of the display contents on the main unit display and the external display> Fig. 4 is an image diagram showing a first display example (A), (B) and a second display example (C) of the outward display section, and Fig. 5 is an image diagram showing a display example of the main body display section.

[0027] The display image is generated by the controller 25 (see FIG. 2 and FIG. 3(B)). Then, the display data is sent from the controller 25 to the main body display unit 19 and the outward display unit 40, and the display image is output to the main body display unit 19 and the outward display unit 40. The controller 25 is a computer that operates according to a control program. The controller 25 is disposed in the operation room 17 or the machine rooms 18a and 18b. The controller 25 may be provided in a location (such as a server room or a cloud) away from the machine body 10A and configured to transmit the display data via communication. Measurement data from various instruments provided on the crane 1 is sent to the controller 25. The measurement data includes load data from a load cell that measures the load of the wire ropes W1 and W2, and angle data from an instrument that measures the angle of the boom 13. The length data of the boom 13 of the crane 1, weight data of the counterweight 21, and the like are registered in the controller 25. Based on these data, the controller 25 can determine the load, total rated load, working radius, and maximum working radius, which will be described later.

[0028] The main body display unit 19 displays status information of the crane 1 that is useful for the operator of the crane 1 when operating the crane 1. For example, as shown in Fig. 5, the information on the main body display unit 19 includes a first display J1 in which values ​​indicating the status of the crane operation are displayed in association with image displays of the crane, the hoisting gear, and the load. The above values ​​include a load (e.g., "16.6") display J1a, which is the weight of the load, a total rated load (e.g., "67.85") display J1b, an operating radius (e.g., "5.5 m") display J1c, a maximum operating radius (e.g., "14.4 m") display J1d, an angle of the boom 13 (e.g., "75.0°") display J1e, and a distance (e.g., "1.0 m") display J1f to the upper limit position of the main hoisting gear 31. The main body display unit 19 additionally includes a meter display J2 of the load rate which is the ratio of the current load to the rated total weight, a numerical display J3 of the load rate, and power source status information J4 (such as engine RPM, engine coolant temperature, fuel gauge, urea water level meter, status display of the aftertreatment device, and images of a first warning light indicating an engine abnormality and a second warning light indicating an engine abnormality). Note that the example in FIG. 5 is merely an example, and the information displayed on the main body display unit 19 may include various information, such as warning information for monitoring the periphery of the crane 1. Here, the load of J1, the maximum working radius, the load rate which is the ratio of the current load to the rated total weight of J2, and the numerical display of the load rate of J3 are amounts calculated based on the load applied to the wire rope.

[0029] Information useful to workers outside the crane 1, particularly to workers performing rigging work, is extracted and output to the outward display unit 40. In other words, the amount of information output to the outward display unit 40 is less than the information output to the main body display unit 19. The information output means the information that is displayed on the screen at one time.

[0030] For example, as shown in FIG. 4(A), the outward display unit 40 outputs text information K1 including information on the load on the main winding side (e.g., "16.6 t"), the total rated load (e.g., "67.8 t"), and the load factor (e.g., "24.5%) which is the ratio of the load to the load, and text information K2 including information on the load on the auxiliary winding side (e.g., "0 t"), the total rated load (e.g., "67.8 t"), and the load factor (e.g., "0%). The main winding side means the side of the load suspended via the main hoist 31. The auxiliary winding side means the side of the load suspended via the auxiliary hoist 32. Note that, although the example in FIG. 4 shows an example in which both the main winding side and the auxiliary winding side are displayed, only the side being used may be displayed. In the outward display unit 40, as the load factor increases stepwise, the display mode such as the background color may change to display multiple levels of warning. FIG. 4(B) shows a display screen in which the load factor has increased and the display mode has been changed to indicate a high warning. The above character information K1, K2 corresponds to an amount calculated based on the load (measurement value of the load cell) of the wire ropes W1, W2. In the embodiment, the load of the wire ropes W1, W2 is obtained by the measurement value of the load cell, but is not limited thereto and may be obtained by measuring the load applied to the winches 16a, 16b around which the wire ropes W1, W2 are wound.

[0031] The second display example of FIG. 4(C) is an example in which symbol information K3a and K3b, which represent the load factor by a meter symbol, is added to the first display example of FIG. 4(A).

[0032] 4(A) to (C), when checking the slinging status, the worker can check the display content of the outward display unit 40 and confirm whether the weight of the load is appropriate while carrying out the checking work. Therefore, highly reliable crane work can be realized.

[0033] Furthermore, according to the display in Figures 4(A) to (C), the worker can easily check whether the main hoist side or the auxiliary hoist side is being used. Therefore, it is difficult to confuse the main hoist side and the auxiliary hoist side. Therefore, it is possible to realize highly reliable crane operation.

[0034] 4(A)-(C), information less necessary for work performed outside the crane 1 (such as information on the status of the power source, crane diagnostic information, etc.) is omitted from the display contents of the main body display unit 19. Therefore, the worker can quickly grasp information that is highly necessary for the work without being distracted by information that is less necessary for the work. Therefore, highly reliable crane work can be achieved.

[0035] The display contents of the outward display unit 40 are not limited to the above examples. For example, the display of the outward display unit 40 may be as shown in FIG. 6 or as shown in FIG. 7. FIG. 6 is an image diagram showing a third display example (A) and (B) of the outward display unit. FIG. 7 is an image diagram showing a fourth display example (A) and (B) of the outward display unit. In FIG. 7(A) and (B), information having the same content as FIG. 6(A) is indicated by the same reference numerals.

[0036] 6(A) and (B) includes graphic information K11 indicating that the information is about the load, and text information K12 indicating the load factor, the load, and the total rated load, arranged next to the graphic information K11. Furthermore, the third display example includes, in different rows above and below, graphic information K13 indicating that the information is about the working radius, and text information K14 indicating the working radius ratio (the ratio of the actual working radius to the maximum working radius), the actual working radius, and the maximum working radius, arranged next to the graphic information K13. Furthermore, the third display example includes text information K15 indicating whether it is the main winding side or the auxiliary winding side.

[0037] As shown in Fig. 6(B), in the third display example, as the load rate or working radius ratio gradually approaches the limit value, the display mode such as the background color may change to display multiple levels of warning. Fig. 6(B) shows a display screen changed to a display mode that indicates a high warning when the working radius becomes large and the load rate and working radius ratio approach the limit value.

[0038] According to the displays of Figures 6(A) and (B), the information regarding the load (graphic information K11 and text information K12) and the text information K15 indicating whether it is the main winding side or the auxiliary winding side provide the same effect as the displays of Figures 4(A) to (C).

[0039] 6(A) and (B), the information on the working radius (pattern information K13 and text information K14) enables the worker to easily understand whether the working radius is normal or not, for example, when guiding the load before it touches the ground. Therefore, highly reliable crane work can be realized.

[0040] The fourth display example in Fig. 7(A) and (B) is an example in which the type of information output changes depending on the working state. The controller 25 determines the working state and automatically changes the type of information based on the result. The controller 25 can determine the working state, such as when slinging, when the load is lifted from the ground, when the suspended load is moving horizontally, and when the load is touching the ground, from the measured value of the load cell and the operation signal of the operation handle. The method of determining the working state is not limited to this, and it is also possible to, for example, photograph the working state with a camera and use pattern matching or the like to determine the working state based on the photographed video (image).

[0041] In the fourth display example, during work conditions such as slinging and lifting a load, information regarding the load shown in Figure 7(A) (graphic information K11 and text information K12) and text information K15 indicating whether it is the main or auxiliary winding side are output.

[0042] On the other hand, in the fourth display example, when the load is moving or in a working state such as when it is on the ground, information regarding the working radius shown in Figure 7(B) (pattern information K13 and text information K14) and text information K15 indicating whether it is from the main winding side or the auxiliary winding side are output.

[0043] Although not shown in the drawings, in the fourth display example as well, a warning may be displayed in stages according to the displayed value.

[0044] According to the fourth display example, information that is less necessary for work is omitted depending on the work status, and the worker can quickly grasp information that is necessary for work. That is, when performing slinging work and checking the slinging status, the worker can quickly grasp information about the load. Also, when performing guiding work before touchdown, the worker can quickly grasp information about the working radius. Therefore, highly reliable crane work can be realized.

[0045] The details of the first to fourth display examples described above are merely examples, and some of them may be different as long as they include at least some text information. For example, the numerical display of the ratio may be replaced with a meter image display, or may be replaced with a display in which meter images are output side by side. Furthermore, text information explaining what each numerical value means (e.g., "load rate," "maximum working radius," etc.) may be output together with each numerical value. Furthermore, it is preferable that at least an amount calculated based on the load on the wire rope is included in the text information. This allows a worker working outside to assist the crane while grasping changes in the state of the crane due to the load on the wire rope.

[0046] As described above, the crane 1 of the first embodiment includes an outward-facing display unit 40 that is attached to a structure 10 capable of suspending a load and outputs information related to the crane operation toward the outside of the structure 10 in a form that includes at least a portion of text information. Therefore, useful information can be provided to workers working outside the crane 1 via the outward-facing display unit 40. Also, for example, the form including text information is different from the form in which information related to the crane operation is output as color or sound information such as a lamp or alarm, and therefore specific information can be output quickly, so that information necessary for the work of the worker working outside the crane 1 can be quickly conveyed. Therefore, highly reliable crane operation can be realized.

[0047] Furthermore, according to the crane 1 of the first embodiment, the outward display unit 40 is disposed outside the operation room 17. This reduces the presence of something like a window that reflects light between the worker working outside and the outward display unit 40. This makes it possible to provide display information from the outward display unit 40 in an easily visible state to the worker outside.

[0048] (Embodiment 2) 8 is a block diagram showing the display control configuration of a crane according to the second embodiment of the present invention. The crane according to the second embodiment has a different control configuration for controlling the display of the main body display unit 19 and the outward display unit 40, and other configurations are the same as those of the first embodiment. In the second embodiment, the controller 25 generates one display screen and sends the display data of the display screen to the main body display unit 19 and the outward display unit 40 via the distributor 26 or the like. Therefore, the same display content is output on the main body display unit 19 and the outward display unit 40.

[0049] The display contents may be the display contents of the main body display unit 19 shown in the embodiment 1, or the display contents of the outward display unit 40 shown in the embodiment 1. In addition, the display contents may be switched by an operator, a worker, or the controller 25 depending on the situation.

[0050] According to the crane of the second embodiment, the processing load of the display control by the controller 25 is reduced. In addition, since common display information is provided to the operator and outside workers, the degree of communication between the operator and outside workers can be increased. Therefore, highly reliable crane operation can be realized.

[0051] (Embodiment 3) 9 is a perspective view showing a crane according to a third embodiment of the present invention. A crane 1B according to the third embodiment is different in the arrangement and support structure of an outward display unit 40, and otherwise has the same configuration as the first or second embodiment.

[0052] In the third embodiment, the outward display unit 40 is disposed below the center in the vertical direction inside the front transparent window of the operation room 17. The outward display unit 40 may have a tilt mechanism 41, although the adjustment angle is narrower than in the first embodiment.

[0053] With the above arrangement, it is possible to realize highly reliable crane operation by sending information to the operator working outside the crane, as in the first and second embodiments. In addition, by arranging the outward-facing display unit 40 inside the operation room 17, it is possible to obtain an effect of reducing the influence of rain and wind on the outward-facing display unit 40.

[0054] (Embodiment 4) FIG. 10 is a block diagram showing a crane according to a fourth embodiment of the present invention. The crane 1C according to the fourth embodiment includes a wearable terminal 46 that outputs information about the crane work in a form that includes at least a part of text information, instead of the outward display unit 40 according to the first to third embodiments. The wearable terminal 46 corresponds to a wearable terminal for peripheral work of the crane 1C. A configuration may be adopted in which the display data is wirelessly transmitted to the wearable terminal 46 via the wireless communication unit 28. The above information is output as display information by a display device 46a such as an organic EL display or a projection type display.

[0055] The wearable terminal 46 has an attachment part 46b and is worn by a worker. The wearable terminal 46 means a terminal that allows the worker wearing the wearable terminal 46 to view the display information without using his / her hands. That is, the worker can view the display information on the wearable terminal 46 while working with his / her hands. The wearable terminal 46 may be, for example, a glasses-type terminal that projects information about the crane work in a form that includes text information in at least a part of the field of view while the worker is visually viewing the outside world. Alternatively, the wearable terminal 46 may be a terminal that outputs display information to a place that can be viewed while working with the hands, such as the arm, as long as the wearable terminal 46 is worn by the worker. The wearable terminal 46 may be in any form as long as it is configured to output information about the crane work in a form that includes text information in at least a part of the device. Since the wearable terminal 46 does not need to be held by hand, the worker can easily view information about the crane work via the wearable terminal 46 while working with his / her hands. However, whereas the wearable terminal 46 requires the worker to wear it, the aforementioned outward-facing display unit 40 has the effect of eliminating this trouble. Also, when there are multiple cranes at a work site, it can be difficult to tell which crane's information is being output with the wearable terminal 46, but the aforementioned outward-facing display unit 40 has the better effect of making it instantly clear which crane's information is being displayed.

[0056] The display information output to the wearable terminal 46 may be similar to the display of the outward display unit 40 shown in the embodiments 1-3.

[0057] According to the crane 1C and the wearable terminal 46 of the fourth embodiment, useful information can be sent to an operator working outside the crane 1C in a manner that does not impede the operator's work. Therefore, highly reliable crane work can be achieved.

[0058] Above, each embodiment of the present invention has been described. However, the present invention is not limited to the above-mentioned embodiments. For example, in the first to third embodiments, an example has been shown in which the outward display unit 40 is provided in front of or inside the operation room 17. However, the arrangement of the outward display unit 40 is not limited to the above-mentioned examples. For example, the outward display unit 40 may be provided on the boom 13, or may be provided on the front side of the machine room 18b that is on the opposite side to the operation room 17, and various other arrangements are applicable.

[0059] Furthermore, in the above embodiment, an example was shown in which the crane is provided with an operation room, but the crane may not have an operation room and may be remotely operated from a control room away from the crane or automatically operated by artificial intelligence. In that case, the main body display unit may be located in a control room away from the crane, and the information related to the crane operation displayed on the main body display unit may be provided to a manager.

[0060] In the above embodiment, the information output from the outward display unit 40 or the wearable terminal 46 is useful information for a worker performing slinging work. However, the information output from the outward display unit 40 or the wearable terminal 46 is not limited to the above example, and may be useful information sent to a worker performing assembling or disassembling outside the crane when assembling or disassembling the crane. For example, when performing a jacking-up operation of the machine body for assembling or disassembling the crane, moment limit information in the jacking-up work (such as the level of the crane (the inclination of the plane connecting the reference positions of the four jacks) and the ground pressure between each jack and the ground) may be output. In the jacking-up work, if the level becomes low, the jacking-up is redone, and if the ground pressure of some of the jacks is low, the position of the jack is changed.

[0061] Furthermore, in the above embodiment, a mobile crane is shown, but the present invention may be applied to any crane as long as the crane has a structure capable of hoisting a load and performs crane work in which an operator works outside the crane. In this case, the structure capable of hoisting a load corresponds to a support that supports a hoisting tool via a wire rope or the like, and a machine body on which a device for raising and lowering the hoisting tool is mounted. Furthermore, if the crane is not a mobile crane, the structure corresponds to a machine body fixed to the ground or the like, its support columns, and a frame supporting the support columns. Therefore, the crane according to the present invention is not limited to a crawler crane, and can be applied to any cranes such as a tower crane, an overhead crane, a jib crane, a retractable crane, a stacker crane, a gantry crane, an unloader, etc., in addition to other mobile cranes such as a wheel crane, a truck crane, a rough terrain crane, and an all-terrain crane. [Explanation of symbols]

[0062] 1, 1B, 1C Crane 10 Structure 10A Aircraft 11 Undercarriage 12 Upper rotating body 13. Boom 14 Pendant parts 15 Mast 16a~16c Winch W1~W3 Wire rope (rope) 17 Control room 18a, 18b Machine room 19 Main unit display 21 Counterweight 25 Controller 26 Distributor 40 Outward-facing display 41 Tilt mechanism 42 Sunshade 46 Wearable Devices 46a Display Device K1, K2, K12, K14, K15 Text information K3a, K3b, K11, K13 design information

Claims

1. A structure capable of suspending a load; An outward display unit that is attached to the structure and outputs information regarding the crane operation toward the outside of the structure in a manner that includes at least a portion of character information; A crane equipped with

2. The structure has an operation room where operation is performed, The outward display unit is disposed outside the operation room. The crane of claim 1.

3. The structure includes a body and a boom supported on the body so as to be capable of being raised and lowered; The control room is disposed at the front of the aircraft body, The outward display unit is disposed on the front side of the operation room and below the center of the operation room. The crane of claim 2.

4. Further comprising a sunshade disposed at least above the screen of the outward-facing display unit, The crane of claim 1.

5. Further comprising a tilt mechanism capable of changing the angle of the screen of the outward display unit. The crane of claim 1.

6. The text information output by the outward display unit includes a quantity calculated based on the load applied to the wire rope. The crane of claim 1.

7. A main body display unit is provided that outputs information regarding crane work to an operator or a manager, The character information output to the outward display unit is less than the character information output to the main body display unit. The crane of claim 6.

8. The type of text information output by the outward display unit changes depending on the working state. The crane of claim 1.

9. A main body display unit is provided that outputs information regarding crane work to an operator or a manager, The same information is output from the outward display unit and the main body display unit. The crane of claim 1.

10. A wearable terminal for use in peripheral work around a crane, comprising a display unit that outputs information relating to crane work, at least some of which includes text information, and a mounting unit that can be mounted on the human body.

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