Winch drum and alarm unit

Abstract

To provide a winch drum capable of easily detecting abnormalities in winding a rope.SOLUTION: A winch drum according to an embodiment of the present disclosure is a winch drum that winds up a rope in multiple layers, and comprises a drum body that aligns the rope in the axial direction around its circumferential surface and winds it up, a first flange and a second flange that are arranged opposite each other at both ends of the drum body, and a sensor that is arranged on at least one of the first flange and the second flange and that detects the position of the rope being wound up.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a winch drum and an annunciation unit. [Background technology]

[0002] Construction machinery such as cranes use multiple ropes, including ropes for lifting loads and ropes for raising and lowering jibs. These ropes are let out from and wound onto a winch drum. When winding the rope, if the rope cannot be wound onto the winch drum in an orderly manner, the rope may become worn and damaged. A winch drum that can wind the rope in an orderly manner is known (JP 2019-123585 A). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-123585 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, the flange of the winch drum has a guide portion that guides the position where the rope is wound, and the ridge of this guide portion is displaced in the opposite direction to the rotation direction of the winding, thereby winding the rope in an orderly manner. In construction machinery, whether the rope is actually being wound in an orderly manner can be confirmed, for example, by the operator of the construction machinery visually checking an image of the winch drum taken by a camera in the cockpit, or by a worker other than the operator directly visually checking the winch drum. If the operator continues to check the winch drum until the rope is completely wound, the operator cannot perform other operations, and the worker cannot perform other tasks, which may reduce work efficiency. There is a need for a means that can easily detect abnormalities in the winding of the rope.

[0005] In view of the above circumstances, an object of the present disclosure is to provide a winch drum that can easily detect abnormalities in the winding of a rope. [Means for solving the problem]

[0006] A winch drum according to one embodiment of the present disclosure that solves the above-mentioned problems is a winch drum that winds up a rope in multiple layers, and includes a drum body that winds up the rope axially aligned on its circumferential surface, a first flange and a second flange that are arranged opposite each other at both ends of the drum body, and a sensor that is arranged on at least one of the first flange and the second flange and that detects the position of the rope being wound up. [Effects of the Invention]

[0007] The winch drum of the present disclosure can easily detect abnormalities in the winding of the rope. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic plan view showing a winch drum according to one embodiment of the present disclosure. [Figure 2] FIG. 2 is a schematic cross-sectional view of the winch drum taken along line AA in FIG. [Figure 3] FIG. 3 is a schematic cross-sectional view showing a winch drum different from the winch drum in FIG. [Figure 4] FIG. 4 is a schematic cross-sectional view showing a winch drum different from the winch drums of FIGS. 2 and 3. In FIG. [Figure 5] FIG. 5 is a schematic cross-sectional view showing a winch drum different from the winch drums of FIGS. 2, 3 and 4. In FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described.

[0010] (1) A winch drum according to one embodiment of the present disclosure is a winch drum that winds up a rope in multiple layers, and includes a drum body that aligns the rope in the axial direction around its circumferential surface and winds it up, a first flange and a second flange that are arranged opposite each other at both ends of the drum body, and a sensor that is arranged on at least one of the first flange and the second flange and that detects the position of the rope being wound up.

[0011] The winch drum is equipped with a sensor mounted on at least one of a first flange and a second flange, which are arranged opposite each other at both ends of the drum body that winds up the rope. This sensor detects whether the wound rope is positioned at a predetermined location, making it easy to detect any abnormalities in the winding of the rope.

[0012] (2) In (1) above, at least one of the first flange and the second flange may have a guide portion that protrudes inward to guide the winding position of the rope to be wound, and the sensor may be disposed on at least one side of the drum body in the circumferential direction relative to the guide portion. Having the guide portions on the first flange and the second flange can reduce abnormalities in winding the rope, and disposing the sensor on at least one side of the drum body in the circumferential direction relative to the guide portion can easily detect abnormalities in winding the rope that occur near the guide portion.

[0013] (3) In the above (2), the sensors may be disposed on both sides of the guide portion in the circumferential direction of the drum body. This makes it possible to accurately detect abnormalities in the winding of the rope that occur near the guide portion.

[0014] (4) In any of (1) to (3), a plurality of the sensors may be arranged in the radial direction of the drum body. By arranging a plurality of the sensors in the radial direction of the drum body, the winding position of the rope in each layer of the rope wound in multiple layers can be detected, and abnormalities in the winding of the rope can be detected with higher accuracy.

[0015] (5) In any of the above (1) to (4), the sensor may be a proximity sensor. By using a proximity sensor as the sensor, the winch drum can be easily obtained.

[0016] (6) An alarm unit according to one embodiment of the present disclosure includes the winch drum described in any one of (1) to (5) above, a judgment unit that receives a signal detected by the sensor and judges whether there is an abnormality in the winding of the rope based on this signal, and an alarm that notifies the user of the abnormality in the winding of the rope in response to an instruction from the judgment unit.

[0017] The alarm unit includes the winch drum of any one of (1) to (5) above and an alarm that alerts the worker to any abnormality in the winding of the rope detected by the sensor, so that the user can easily recognize any abnormality in the winding of the rope.

[0018] [Details of the Mode for Carrying Out the Disclosure] An example of an embodiment of the present disclosure will be described in detail below.

[0019] First Embodiment As shown in Figures 1 and 2, the winch drum 1 comprises a drum body 10 that winds up the rope R axially aligned on its circumferential surface, a first flange 11 and a second flange 12 that are arranged opposite each other at both ends of the drum body 10, and a sensor 20 that is arranged on at least one of the first flange 11 and the second flange 12 and detects the position of the wound rope R.

[0020] The winch drum 1 winds up the rope R in multiple layers. Specifically, for example, the rope R is aligned spirally in the axial direction on the circumferential surface of the drum body 10 from the first flange 11 toward the second flange 12 to form a first layer, then the rope R is aligned spirally in the axial direction on the first layer from the second flange 12 toward the first flange 11 to form a second layer, and then the rope R is aligned spirally in the axial direction on the second layer from the first flange 11 toward the second flange 12 to form a third layer. By repeating this process, the rope R is wound up in multiple layers. A groove may be formed on the circumferential surface of the drum body 10 for aligning the rope R in the axial direction and winding it up in the first layer.

[0021] In this embodiment, the first flange 11 and the second flange 12 have guide portions 111, 121 that protrude inward (in the direction facing the other flange 12, 11) to guide the winding position of the rope to be wound. The guide portions 111, 121 extend in the radial direction of the drum body 10 on the inner surfaces (facing surfaces) of the first flange 11 and the second flange 12, and are formed in a substantially triangular shape in cross section parallel to the axis of the drum body 10.

[0022] The sensor 20 is disposed on at least one of the first flange 11 and the second flange 12, and is disposed on at least one side of the guide portions 121 in the circumferential direction of the drum body 10. In other words, the sensor 20 is disposed on at least one side of the guide portions 121 in the winding direction of the rope R (the rotation direction in which the winch drum 1 winds the rope R) and the unwinding direction of the rope (the opposite direction to the winding direction) of the rope, relative to the guide portions 121. In Figs. 1 and 2, the sensor 20 is disposed on the second flange 12, on the winding direction side of the rope R relative to the guide portion 121.

[0023] The sensor 20 detects the position of the rope R being wound. Specifically, the sensor 20 detects at least one of the position where the rope R is closest to the second flange 12, i.e., the end position where the rope R is wound in the first layer, and the start position where the rope R is wound in the second layer. For example, the sensor 20 turns ON (or OFF) when the last part of the rope R wound in the first layer (the part in the first layer closest to the second flange 12) is caught in a desired position, thereby confirming that the winding of the first layer of rope R has been completed successfully. Alternatively, the sensor 20 turns ON (or OFF) when the first part of the rope R wound in the second layer (the part in the second layer closest to the second flange 12) is caught in a desired position on the first layer, thereby confirming that the winding of the second layer of rope R has been completed successfully.

[0024] The sensor 20 is not particularly limited as long as it can detect the rope R, but a proximity sensor is preferable. By using a proximity sensor, it is possible to easily detect that the rope R has been properly wound and reached a predetermined position. In addition, the sensor can be easily disposed on the flanges 11, 12, and the winch drum 1 can be obtained at a relatively low cost.

[0025] The winch drum 1 is provided with a sensor 20 that detects the winding position of the rope R, so that any abnormality in the winding of the rope R can be easily confirmed.

[0026] [Alarm unit] The alarm unit includes the winch drum 1, a determination section (not shown) that receives a signal detected by the sensor 20 and determines, based on this signal, whether there is an abnormality in the winding of the rope R, and an alarm (not shown) that, in response to an instruction from the determination section, notifies the user of an abnormality in the winding of the rope R. The determination section is configured to be able to communicate with the sensor 20 and the alarm.

[0027] For example, if the sensor 20 turns ON at a predetermined timing while the winch drum 1 is winding the rope R, the determination unit determines that the winding of the rope R is normal. If the sensor 20 continues to remain OFF, the determination unit determines that the winding of the rope R is abnormal, and instructs the alarm to notify a user (for example, an operator of a construction machine equipped with the winch drum). The user who receives the notification checks the winding status of the winch drum 1 and performs rewinding work if necessary.

[0028] The alarm is not particularly limited, and examples thereof include a warning light, a display, an alarm, a vibrator, etc. That is, the means for notifying the user may appeal to the user's visual sense, or may appeal to the user's auditory or tactile sense.

[0029] The determination unit is preferably capable of communicating with a drive control unit (not shown) that controls a drive unit that rotates and drives the winch drum 1. The determination unit is preferably configured to obtain information on the rotation speed of the winch drum 1 from the drive control unit and to determine whether the rope R is located within the detection range of the sensor 20. In this manner, the determination unit can easily make a determination at an appropriate time by checking the signal of the switch 20 when the rotation speed of the winch drum 1 reaches a rotation speed at which the rope R is located within the detection range of the sensor 20. Furthermore, the determination unit is preferably configured to instruct the alarm to issue an alert and to instruct the drive control unit to stop driving when it determines that there is an abnormality in the winding of the rope R.

[0030] Since the alarm unit is equipped with the winch drum 1, the judgment unit, and the alarm, the user can easily recognize any abnormalities in the winding of the rope R, which can prevent the rope R and the winch drum 1 from being damaged due to the rope R being wound haphazardly, and can improve work efficiency.

[0031] Second Embodiment Another example of an embodiment of the present disclosure will be described in detail below. Note that the same components as those of the winch drum 1 described above will be assigned the same reference numerals and descriptions thereof will be omitted.

[0032] 3, the winch drum 2 is provided with two sensors 21, 22 on the second flange 12, and the sensors 21, 22 are arranged on both sides of the guide portion 121 in the circumferential direction of the drum body 10. Specifically, the first sensor 21 is arranged on the guide portion 121 on the winding direction side of the rope R, and the second sensor 22 is arranged on the guide portion 121 on the unwinding direction side of the rope R. The first sensor 21 and the second sensor 22 may detect the winding end position of the first layer of the rope R, or may detect the winding start position of the second layer of the rope R.

[0033] Whether the winding position of the rope R is normal or abnormal is determined by the ON / OFF combination of the first sensor 21 and the second sensor 22. For example, if the first sensor 21 is ON and the second sensor 22 is OFF, it may be determined that the winding is normal, and if any other ON / OFF combination is used, it may be determined that the winding is abnormal.

[0034] The winch drum 2 detects the winding position of the rope R using the pair of sensors 21, 22, so that normality and abnormality in the winding of the rope R can be confirmed with high accuracy.

[0035] Third Embodiment Another example of an embodiment of the present disclosure will be described in detail below.

[0036] 4, the winch drum 3 is provided with a plurality of (three in this embodiment) sensors 23, 24, 25 arranged in the radial direction of the drum body 10. Specifically, the three sensors 23, 24, 25 are arranged in the winding direction of the rope R relative to the guide portion 121 of the second flange 12, and detect the position of the rope R that is closest to the second flange 12 in each layer. The third sensor 23 detects the winding end position of the first layer of the rope R, the fourth sensor 24 detects the winding start position of the second layer of the rope R, and the fifth sensor 25 detects the winding end position of the third layer of the rope R. The fourth sensor 24 may be arranged on the first flange 11 so as to detect the winding end position of the second layer of the rope R.

[0037] The winch drum 3 detects the winding position of the rope R in each of the multiple layers using the multiple sensors 23, 24, and 25, so that normality and abnormality in the winding of the rope R can be confirmed with high accuracy.

[0038] <Fourth embodiment> Another example of an embodiment of the present disclosure will be described in detail below.

[0039] 5, the winch drum 4 has a plurality of (six in this embodiment) sensors 26, 27, 28, 29, 30, 31 arranged on both sides of the drum body 10 in the circumferential direction with respect to the guide portion 121 of the second flange 12 and in the radial direction of the drum body 10. Specifically, three sensors 26, 28, 30 are arranged in the radial direction with respect to the guide portion 121 on the winding direction side of the rope R, and the other three sensors 27, 29, 31 are arranged in the radial direction with respect to the guide portion 121 on the unwinding direction side of the rope R.

[0040] The six sensors 26, 27, 28, 29, 30, and 31 detect the position of the rope R in each layer that is closest to the second flange 12. Specifically, the sixth sensor 26 and the seventh sensor 27 detect the winding end position of the first layer of the rope R, the eighth sensor 28 and the ninth sensor 29 detect the winding start position of the second layer of the rope R, and the tenth sensor 30 and the eleventh sensor 31 detect the winding end position of the third layer of the rope R. The eighth sensor 28 and the ninth sensor 29 may be disposed on the first flange 11 so as to detect the winding end position of the second layer of the rope R.

[0041] The winch drum 4 detects the winding position of the rope R in each of the multiple layers using a pair of sensors 26, 27, 28, 29, 30, and 31, respectively, so that normality and abnormality in the winding of the rope R can be confirmed with higher accuracy.

[0042] <Other embodiments> The above-described embodiments do not limit the configuration of the present invention. Therefore, the above-described embodiments may include omissions, substitutions, or additions of components based on the description in this specification and common general technical knowledge, and all of these should be construed as belonging to the scope of the present invention.

[0043] The guide portion formed on the flange is not a required configuration, and in a flange without a guide portion, the sensor may be positioned to detect the rope at a position closest to the flange.

[0044] The alarm may notify a worker other than the user of the winch drum, or may notify both the user and the other worker. [Industrial Applicability]

[0045] The winch drum of the present disclosure can detect abnormalities in the winding of the rope, thereby preventing the rope from being wound randomly. When used in construction machinery, etc., it can improve the work efficiency of the operator of the construction machinery. [Explanation of symbols]

[0046] 1,2,3,4 winch drum 10 Drum body 11 First flange 111 Guide section 12 Second flange 121 Guide part 20 sensors 21 First sensor 22 Second sensor 23 Third Sensor 24 4th sensor 25 5th Sensor 26 6th Sensor 27 7th Sensor 28 8th Sensor 29 9th Sensor 30 10th Sensor 31 11th Sensor R rope

Claims

1. A winch drum that winds rope in multiple layers, a drum body that winds up the rope on its circumferential surface in an axial direction; a first flange and a second flange disposed opposite each other at both ends of the drum body; a sensor disposed on at least one of the first flange and the second flange, for detecting the position of the wound rope; A winch drum.

2. At least one of the first flange and the second flange has a guide portion that protrudes inward to guide the winding position of the rope to be wound, 2. The winch drum according to claim 1, wherein the sensor is disposed on at least one side of the guide portion in the circumferential direction of the drum body.

3. 3. The winch drum according to claim 2, wherein the sensors are disposed on both sides of the guide portion in the circumferential direction of the drum body.

4. The winch drum according to claim 1, wherein a plurality of the sensors are arranged in the radial direction of the drum body.

5. 2. The winch drum of claim 1, wherein the sensor is a proximity sensor.

6. A winch drum according to any one of claims 1 to 5; a determination unit that receives a signal detected by the sensor and determines an abnormality in the winding of the rope based on the signal; an alarm that notifies the user of an abnormality in the winding of the rope in response to an instruction from the judgment unit; An alarm unit comprising:

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