JP4658574B2 - Cable storage device - Google Patents

Description

The present invention relates to a cable storage device that winds and stores a cable of a port crane such as a container crane.

In a harbor crane, a spreader cable (hereinafter, referred to as a cable) hanging from a trolley is stored in a cable storage device installed on the spreader when the spreader is wound up.
FIG. 15: is sectional drawing which shows an example of the cable storage apparatus (refer patent document 1) of the conventional harbor crane. The cable storage device 900 includes a basket body 10 and a conical cone 2 provided on the bottom of the basket body 10. The basket body 10 includes a bottomed cylindrical basket body 1, a plurality of pillars 91 projecting upward from the top of the basket body 1 toward the cylinder center axis direction, and projecting in the opposite direction at the top part. It comprises a ring-shaped member 92 that is fixed and reinforced at three points: a lower side portion, a central constricted portion, and an upper side portion. The upper frame 93 composed of the support column 91 and the ring-shaped member 92 has a megaphone shape as a whole, and the cable C is dropped from above. The ring-shaped member 92 functions as a guide when the cable C is dropped. The dropped cable C is wound around the cone 2 so as to wind up a tuna.

When the cable C is spilled by winding up the spreader, the spillage of the cable C is confirmed by the driver's visual observation. However, when the cable storage device 900 is used for a remote automatic transfer crane (RTG), there is a problem that the driver cannot ride on the RTG, so that the spillage of the cable C cannot be visually confirmed.
JP-A-11-246171 (paragraphs [0019] to [0029] and FIG. 1)

  Therefore, the present invention has been made in view of the above, and an object of the present invention is to provide a cable storage device capable of automatically detecting cable spillage.

A cable storage device according to a reference example of the present invention is a cable storage device including a basket for storing a cable, and a cone provided in the basket and winding the cable around the periphery thereof. A sensor device is provided that detects a cable located outside and at a predetermined distance or more below the upper end portion of the basket.

When the cable spills from the basket, the cable is caught on the upper end of the basket. If this sensor is used and a sensor device is provided below the upper end portion of the basket by a predetermined distance or more, the cable is caught in the sensor device, so that the cable spillage can be detected. In addition, cable spillage may be detected by using the upper end portion of the basket itself as a sensor.
The sensor device refers to a sensor and a related structure.

In order to achieve the above-mentioned object, a cable storage device according to the present invention includes a basket for storing a cable, and a cone provided in the basket and a cone for winding the cable around the periphery of the basket. The apparatus is characterized in that a wire is stretched outside the basket and at a predetermined height from the upper end portion of the basket so as to surround the wire, and detection portions are provided at both ends or one end of the wire.

  When the cable is spilled from the basket, the cable is hooked on the wire provided so as to surround the predetermined height position from the upper end portion on the outside of the basket, so that the wire is pulled by the weight of the cable. By detecting this by the detection unit, cable spillage can be automatically detected.

  In the cable storage device according to the present invention, the detection unit includes a weight connected to both ends or one end of the wire, and a position sensor that detects the position of the weight.

When the cable spills from the basket, the cable is hooked on a wire provided so as to surround a predetermined height position from the upper end portion of the outside of the basket, so that the wire is pulled by its own weight.
As a result, the weight increases, and by detecting this with a position sensor, it is possible to automatically detect cable spillage.
The position sensor is, for example, a proximity sensor or a limit switch.

  In the cable storage device according to the present invention, the detection unit is a displacement sensor or a force sensor provided at both ends or one end of the wire.

When the cable spills from the basket, the cable is hooked on a wire provided so as to surround a predetermined height position from the upper end portion of the outside of the basket, so that the wire is pulled by its own weight.
If this is detected by a displacement sensor or a force sensor, cable spillage can be automatically detected.
The displacement sensor is, for example, a potentiometer, and the force sensor is, for example, a load cell.

  In the cable storage device according to the present invention, the wire is provided at a position higher than an upper end portion of the basket.

The wire is placed higher than the upper end of the basket. Conversely, if the wire is placed lower than this, the cable may not hit the wire when the cable is caught only in the upper end of the basket. This is because cable spillage cannot be detected.
In addition, the wire forms a megaphone-shaped pseudo-upper frame together with the basket, so that it also functions as a cable guide.

  In the cable storage device according to the present invention, a plurality of support columns are provided at intervals so as to surround the basket, and the wire is held in an unconstrained and movable state provided in the support columns. It is held by a member.

Since the wire is held by a holding member that holds the wire in an unconstrained and movable state, the wire is easily pulled when the cable is caught on the wire. Thereby, it is possible to prevent the detection of cable spillage.
As the holding member, a ring, a pulley, a hole, a cylinder, a hook, or the like is preferably used.

  In the cable storage device according to the present invention, the holding member provided on the support column of the portion where both ends of the wire are guided to the detection unit has a structure in which a ring is connected, and the ring surface of the ring is It is characterized by being provided perpendicular to or inclined with respect to the ground.

If the ring surface is provided perpendicularly or inclined with respect to the ground, even if the cable is spilled on the ring, it does not get caught by this but falls to the wire side and gets caught. Thereby, it is possible to prevent the detection of cable spillage.
If the ring is standing, the connecting direction may be either vertical or horizontal, but it is more effective if the connecting direction is the vertical direction.

  The cable storage device according to the present invention is a cable storage device comprising a basket for storing a cable, and a cone provided in the basket and winding the cable around the periphery thereof. A first ring-shaped plate attached to the part, a second ring-shaped plate disposed above the first ring-shaped plate, and the first ring-shaped plate and the second ring-shaped plate. And an elastic body that supports them so as to be able to contact and separate, and a switch that detects an approach between the first ring-shaped plate and the second ring-shaped plate.

  When the cable spills from the basket, the cable is caught on the second ring-shaped plate that constitutes the upper end portion of the basket itself. As a result, the second ring plate sinks due to the action of the elastic body and approaches the first ring plate. When the switch detects the proximity of the second ring plate to the first ring plate, cable spillage can be automatically detected.

Further, a cable storage device according to a reference example of the present invention is a cable storage device including a basket for storing a cable, and a cone provided in the basket and winding the cable around the periphery thereof. A laser light path is formed outside the basket by a laser light source so as to surround an upper portion of the basket, and a light receiving portion for the laser light is provided.

  As the cable spills out of the basket, the cable traverses a laser beam path provided outside the basket and surrounding its upper portion. By detecting this with the laser receiving unit, cable spillage is automatically detected.

  According to the cable storage device of the present invention, since cable spillage can be automatically confirmed, it is suitable for a crane such as an RTG.

Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements of the embodiments described below include those that can be easily replaced by those skilled in the art or those that are substantially the same.
[First embodiment]

FIG. 1 is a perspective view showing a cable housing device according to the first embodiment of the present invention. FIG. 2 is an explanatory view showing a state where the cable is attached. FIG. 3 is a configuration diagram illustrating the detection unit. The cable storage device 100 includes a basket body 10 and a conical cone 2 provided on the bottom of the basket body 1.
The basket body 10 includes a bottomed cylindrical basket body 1 attached to an upper portion of a spreader (not shown), an upper frame body 14 provided on the upper portion of the basket body 1, and a detection unit 9.

The upper frame body 14 includes four struts 3 projecting upward from the top of the basket body 1 toward the cylinder central axis direction, and a ring-shaped member 4 that fixes and reinforces the struts 3 at two points, the center and the upper side. And.
The detection device (sensor device) 16 is welded to the upper flange of the basket body 1 and protrudes upward and in the direction of the center of the cylinder, and all other detection columns 5 except for one. The eyebolt 6 provided at the upper part of each of the two, the two pulleys 7 provided at the upper part of the one detection column 5, and the upper ring-shaped member 4 are passed through each eyebolt 6 as shown in FIG. Thus, the wire 8 is stretched in a substantially regular octagon shape and both ends are guided to the detection unit 9 via the pulley 7, and the detection unit 9 that detects that the cable C is caught by the wire 8.

As shown in FIG. 3, the detection unit 9 includes a cylindrical member 11 attached to the basket body 1, a weight 12 disposed inside the cylindrical member 11 so as to be movable up and down, and an electrostatic provided on the cylindrical member 12. And a capacitive proximity sensor 13.
Both end portions 8 a of the wire 8 are connected to the top surface of the weight 12. The proximity sensor 13 is positioned on the top surface 12 a of the weight 12 in a normal state, that is, in a state where the cable C is not caught on the wire 8. When the weight 12 is installed, the positions of the weight 12 and the proximity sensor 13 are matched.
The distance between the upper end portion 12b of the weight 12 and the proximity sensor 13 is determined based on the weight of the cable C, the directivity of the proximity sensor 13, and the like. That is, the amount by which the weight is actually moved when the cable C is hooked on the wire 8 is set as the interval in consideration of the position where the proximity sensor 13 starts to detect the weight 12.
In the present embodiment, both ends of the wire 8 are connected to the weight 12, but only one end of the wire 8 may be connected to the weight 12, and the other end may be fixed to the basket body 1 or the like.

Next, as shown in FIG. 1, the position where the wire 8 is stretched is a position higher than the upper ring-shaped member 4, and the length between the opposing positions passing through the center of the substantially octagonal axis is the upper side. It is assumed that it is larger than the diameter of the ring-shaped member 4. This is because if the cable C is hooked only on the upper ring-shaped member 4, spillage of the cable C cannot be detected if it is provided at a position lower than the upper ring-shaped member 4.
Further, the wire 8 together with the support column 3 and the ring-shaped member 4 forms a megaphone-shaped pseudo upper frame 15 as a whole, thereby functioning as a guide for the cable C.

In this cable storage device 100, as shown in FIG. 1, when the cable C is spilled and caught on the wire 8, the wire 8 is pulled by the weight of the cable C and the weight 12 is raised.
As the weight 12 rises, the upper end portion 12b of the weight 12 is positioned in front of the proximity sensor 13, and the proximity sensor 13 outputs a detection signal. This detection signal is sent to an RTG management room (not shown), and the driver knows that the cable C has been spilled.
Thereby, the spillage of the cable C can be automatically detected in the harbor crane.
In addition, since only one proximity sensor 13 is necessary for the electronic component, the apparatus can be configured at low cost.

Although not shown, the eyebolt 6 may be provided on the top of the detection column 5.
In this case, although it is unlikely to be possible, it is possible to prevent the cable C from being caught on the top of the detection column 5, that is, not caught by the wire 8, and as a result, it is possible to prevent the cable C from being detected.
Although not shown, the top of the detection column 5 may be a pyramid or a cone. In this way, it is possible to prevent the wire from being caught on the top of the detection column 5.

In the present embodiment, the position where the wire 8 is stretched is higher than the upper ring-shaped member 4. However, if the guide function by the wire 8 is unnecessary, the position may be lower.
Further, a siren or a sign pole may be provided in the cable storage device 100 and these may be operated based on a detection signal of the proximity sensor 13. In this way, the operator can easily find the cable storage device 100 in which the cable C has spilled in a wide harbor.
Furthermore, although the proximity sensor 13 is used in this embodiment, a limit switch may be used. The hinge lever type may be provided at the same position as the proximity sensor 13. The plunger type is provided on the upper part of the cylindrical member 11 so that the top surface 12a of the weight 12 contacts the plunger.

[Second Embodiment]
FIG. 4 is a perspective view showing a cable storage device according to the second embodiment of the present invention. FIG. 5 is a partially enlarged view of the cable storage device of FIG. 4.
In the cable storage device 200, the eyebolt 6 of the cable storage device 100 of the first embodiment is provided at the upper end 5a of the detection column 5, and the eyeglass-shaped eyebolt 20 is replaced with the upper end 5a of one detection column 5 instead of the pulley 7. The point which was provided in is different. Other configurations are the same as those of the first embodiment, and the same components are denoted by the same reference numerals.
Thus, by providing the eyebolt 6 on the detection support 5, it is possible to prevent the cable C from being caught on the upper end 5 a of the detection support 5.

In the case of the cable storage device 100 according to the first embodiment, the two pulleys 7 are connected in the lateral direction to the detection support column 5 where the wire 8 is guided to the detection unit 9. The cable C fits between the cable 7 and the wire 8 may not detect the spillage of the cable C.
For this reason, in this embodiment, the eyeglass-like eyebolt 20 with two holes 21 is used in the vertical direction. As shown in the figure, the vertical direction refers to a state in which the glasses 22 are standing up and the ring 22 is continuously arranged up and down.
Both ends of the wire 8 stretched so as to surround the upper ring-shaped member 4 are respectively guided through the upper and lower holes 21 to the lower detection unit 9. As a result, even if the cable C spills on the tip 20a of the eyebolt 20, the cable C falls on either side and is caught by the wire 8, so that the spillage of the cable C can be reliably detected.
The eyeglass-shaped eyebolt 20 may be manufactured by welding two eyebolt rings 22 and cutting one screw portion 23.

In the present embodiment, the eyeglass-shaped eyebolt 20 is provided in the vertical direction. However, as shown in FIG. 6, the horizontal direction (the direction in which the ring 22 is connected to the left and right and the radial direction of the basket body 1 is referred to). 6 (a)), or the oblique direction (the direction in which the ring 22 is obliquely connected and the radial direction of the basket body 1. Refer to FIG. 6 (b)). That is, the ring surface 26 of the eyebolt 20 is not parallel to the ground (a state in which a 5-yen coin is placed on the ground), but is substantially vertical or at least 45 degrees oblique (a 5-yen coin). In a state where the eyebolt stands on the ground or is inclined (see FIGS. 6 (c) and 6 (d)), the eyebolts 20, 24 and 25 are arranged in any of the vertical, horizontal and diagonal directions. This is because when the cable C is spilled on the eyebolts 20, 24, 25, it can be dropped to the wire 8 side without being caught.
Particularly, the longitudinal direction is excellent in that the cable C is not caught even if the ring surface 26 is not aligned with the radial direction of the basket body 1.

[Third embodiment]
Further, instead of the eyebolt 6 provided on the detection column 5 (excluding the detection column 5 provided with the pulley 7 and the detection column 5 provided with the spectacle-shaped eyebolt 20) of the first embodiment and the second embodiment, FIG. A pulley 30 as shown in FIG. Moreover, the upper end 5a of each detection support | pillar 5 may be made into a pyramid shape (or cone shape), and the cable C may be made not to be caught in the said part. Further, although not shown in the drawings, any eye bolt 6 or pulley 7, a hole provided in the detection column 5, a hook or the like can be used as long as the wire 8 can be held in a movable state without being restrained. .

As another modification, as shown in FIG. 8A, a load cell 31 may be used as the detection unit 9 of the first embodiment and the second embodiment.
By connecting the end 8a of the wire 8 to the load cell 31 provided in the basket body 1 and detecting the weight of the cable C, the spillage of the cable C is automatically detected.
Moreover, as shown in FIG.8 (b), you may use the potentiometer 32 or the optical displacement sensor 32 as the detection part 9 of 1st embodiment and 2nd embodiment.
By connecting the end 8a of the wire 8 to a potentiometer 32 or an optical displacement sensor 32 provided on the basket body 1, and detecting the movement of the wire 8 caused by the cable C, the spillage of the cable C is detected.
In addition, although not shown, an electrical short circuit between the wire 8 and the cable C may be detected.

[Fourth embodiment]
FIG. 9 is a perspective view showing a cable housing device according to the fourth embodiment of the present invention. 10 and 11 are explanatory diagrams illustrating the configuration of the detection unit.
The cable storage device 400 has a bottomed cylindrical basket body 1, a conical cone 2 provided on the bottom of the basket body 1, and projects upward from the upper portion of the basket body 1 toward the cylinder central axis. Four pillars 3 provided, a ring-shaped member 4 that fixes and reinforces the pillar 3 at the center, and a ring-shaped detection unit (sensor device) that is provided on the top of the pillar 3 and detects that the cable C is caught. , Detection unit) 40.
The strut 3, the ring-shaped member 4, and the ring-shaped detection unit 40 constitute a trumpet-shaped upper frame 14 as a whole. That is, the ring-shaped detection unit 40 has a reinforcing function as well as a detection function, and constitutes the upper end portion itself of the upper frame body 14.

As shown in FIG. 10, the ring-shaped detection unit 40 includes a first ring-shaped plate 41 attached to the upper end portion of the support column 3, and a second ring-shaped plate 42 disposed above the first ring-shaped plate 41. A plate-shaped spring 43 provided at a predetermined interval of 90 degrees between the first ring-shaped plate 41 and the second ring-shaped plate 42, and a limit switch 44 provided between the spring 43 and the spring 43, respectively. Composed.
The spring 43 is fixed to the first ring-shaped plate 41 and the second ring-shaped plate 42, and holds the second ring-shaped plate 42 above the first ring-shaped plate 41 with a gap. (See Figure 11)
The limit switch 44 is fixed to the first ring plate 41 so that the arm 45 is not in contact with the lower surface 42a of the second ring plate 42.

In the cable storage device 400, when the cable C is spilled, the cable C rides on the second ring-shaped plate 42 of the ring-shaped detection unit 40, so that the spring 43 is compressed by the weight of the cable C, and the second ring-shaped plate 42 sinks. Thereby, the arm 45 of the limit switch 44 hits the lower surface 42a of the second ring-shaped plate 42, and the spillage of the cable C is detected.
A proximity switch may be used instead of the limit switch 44.
The spring 43 may be a coil spring in addition to a leaf spring.

FIG. 12 is a side view showing a modification of the cable storage device of the fourth embodiment.
As described above, the ring-shaped detection unit 40 may be provided on the top of the megaphone-shaped upper frame 47.
In this way, the cable C spillage detection function and the cable C guide function can be provided.

[Fifth embodiment]
FIG. 13 is a perspective view showing a modification of the cable storage device of the present invention. The cable storage device 500 is substantially the same as that of the second embodiment, except that a detection support 51 for supporting the wire 8 is provided on the upper ring-shaped member 4. In addition, the same code | symbol is attached | subjected to the component same as 2nd embodiment, and description is abbreviate | omitted.
Thus, by providing the detection support column 51 on the upper ring-shaped member 4, the amount of material used for the detection support column 51 can be reduced.
Moreover, FIG.13 (b) is an enlarged view of the dashed-two dotted line part of Fig.13 (a), and the both ends of the wire 8 are penetrated from the both sides of one eyebolt 6, and through the lower guide ring 52, It is connected to the detection unit 9. Even if it is the structure which concerns, the spillage of the cable C can be automatically detected similarly to 1st embodiment-3rd embodiment.

[Sixth embodiment]
FIG. 14 is a perspective view showing a cable housing device according to the sixth embodiment of the present invention. The cable storage device 600 is substantially the same as that of the first embodiment, except that a detection unit using laser light is provided in the detection device 16. In addition, the same code | symbol is attached | subjected to the component same as 1st embodiment, and description is abbreviate | omitted.
The detection unit according to the present embodiment includes a prism 61 provided on each of the other detection columns 5 except for one, and a laser light source 62 and a light receiving unit 63 provided on the one detection column 5. ing.

The laser light forms a substantially annular laser light path L by the laser light source 62 and the prism 61 so as to surround the upper outside of the upper ring-shaped member 4.
This laser beam path L is at a position higher than the upper ring-shaped member 4. This is because if it is provided at a position lower than the upper ring member 4, it cannot be detected when the cable is caught only by the upper ring member 4.
In place of the prism 61, a mirror may be used.

In the cable storage device 600, as shown in FIG. 14, when the cable C is spilled and crosses the laser light path L, the laser light path L is momentarily interrupted. This is detected by the light receiving unit 63 and an output signal is output to the outside. This detection signal is sent to an RTG management room (not shown), so that the driver knows that the cable C is spilled.
Accordingly, cable spillage can be automatically detected in a harbor crane.

It is a perspective view which shows the cable storage apparatus which concerns on 1st embodiment of this invention. It is explanatory drawing which shows the attachment state of a cable. It is a block diagram which shows a detection part. It is a perspective view which shows the cable storage apparatus which concerns on 2nd embodiment of this invention. FIG. 5 is a partially enlarged view of the cable storage device of FIG. 4. It is explanatory drawing which shows the modification of the cable storage apparatus shown in FIG. It is a perspective view which shows the cable storage apparatus which concerns on 3rd embodiment of this invention. It is a perspective view which shows the cable storage apparatus which concerns on 3rd embodiment of this invention. It is a perspective view which shows the cable storage apparatus which concerns on 4th embodiment of this invention. It is explanatory drawing which shows the structure of a detection part. It is explanatory drawing which shows the structure of a detection part. It is a side view which shows the modification of the cable storage apparatus of 4th embodiment. It is a perspective view which shows the modification of the cable storage apparatus of this invention. It is a perspective view which shows the cable storage apparatus which concerns on 6th embodiment of this invention. It is sectional drawing which shows an example of the cable storage apparatus of the conventional harbor crane.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Cable storage apparatus 2 Cone 4 Ring-shaped member 5 Support | pillar 6 Eyebolt 7 Pulley 8 Wire 9 Detection part 10 Basket 12 Weight 13 Proximity sensor 41 First ring-shaped plate 42 Second ring-shaped plate 43 Spring 44 Limit switch 62 Laser light source 63 Light reception Part C Cable L Laser path

Claims (7)

In a cable storage device comprising: a basket for storing a cable; and a cone provided in the basket and winding the cable around the periphery of the basket.
The wire is surrounded on the outside of the basket and at a predetermined height from the upper end portion of the basket so as to surround the wire, and detection portions for detecting deformation of the wire are provided at both ends or one end of the wire. Cable storage device. The cable storage device according to claim 1 , wherein the detection unit includes a weight connected to both ends or one end of the wire and a position sensor that detects a position of the weight. The cable storage device according to claim 1 , wherein the detection unit is a displacement sensor or a force sensor provided at both ends or one end of the wire. The wire, cable storage device according to any one of claims 1 to 3, characterized in that provided in a position higher than the upper end of the basket. A plurality of struts are provided at intervals so as to surround the periphery of the basket,
The wire, cable storage device according to any one of claims 1 to 4, characterized in that it is held by a holding member for holding unrestrained and movably provided on the strut. The holding member provided on the column of the portion where both ends of the wire are led to the detection unit has a structure in which a ring is continuously provided, and the ring surface of the ring is provided to be perpendicular or inclined with respect to the ground. The cable storage device according to claim 5 , wherein the cable storage device is provided. In a cable storage device comprising: a basket for storing a cable; and a cone provided in the basket and winding the cable around the periphery of the basket.
A first ring plate attached to the upper end of the basket;
A second ring plate disposed above the first ring plate;
An elastic body provided between the first ring-shaped plate and the second ring-shaped plate, and supporting them so as to be able to contact and separate;
A cable storage device comprising: a switch for detecting an approach between the first ring-shaped plate and the second ring-shaped plate.

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