JP5413901B2 - Cable winding and unwinding structure - Google Patents

Description

  The present invention relates to a cable winding / unwinding structure capable of gently winding or unwinding a cable around a rotating shaft.

  FIG. 12 shows a cable support device capable of winding a cable around a conventional rotating shaft. (See Patent Document 1)

  In the present invention, the cable 60 is suspended by a plurality of cable suspenders 61, and the suspending rail 62 is inclined in the tangential direction at a location remote from one end of the cable support end. The cable 60 is wound around the rotating shaft 63 by being suspended by the tool 61.

  However, in the conventional structure, the cable 60 is wound at a speed similar to the rotational speed of the rotary shaft 63, so that the cable 60 is tightened in a portion other than the cable 60 supported by the hanging tool 61, or the cable 60 In some cases, the cable 60 may be entangled during rewinding, and a load may be applied to the cable 60. In addition, it is necessary to install a plurality of suspending tools 61, and in the case of a large-sized device, the cable 60 itself is heavy, and the burden on the suspending device 61 is increased. The winding effect could not be obtained.

Japanese Unexamined Patent Publication No. 61-4695

  In view of the above circumstances, the present invention solves the problem that the connection cable is tightened when the connection cable is wound or the connection cable becomes entangled when the connection cable is rewound, and the cable is gently wound even for a large apparatus. It is an object of the present invention to provide a cable winding / rewinding structure that enables winding and rewinding.

Means for Solving the Problems and Effects of the Invention

The cable winding structure of the present invention for solving the above problems is arranged on the upper side of the casing , a prime mover connected to the bottom side of the casing , a rotating shaft that is driven by the prime mover to rotate forward and backward , An actuated body that is attached to the rotating shaft and rotates around the rotating axis , an end portion is pulled out from the actuated body , the other end portion is connected to the bottom of the housing, and is arranged in a spiral around the rotating shaft A connecting cable , a speed reduction mechanism that is installed on the bottom side of the housing and is connected to a rotating shaft driven by a prime mover and decelerates the rotation of the rotating shaft, and a radial direction from the base end located on the rotating axis side the tip portion toward the outside is projected arranged, and a cable holding lever at a reduced speed around the rotational axis via a reduction mechanism,
In the middle of the connection cable, it is fixed to the cable holding lever , and the distance from the fixed position to the rotation axis is longer than the distance from the connection position of the connection cable drawn from the actuated body to the rotation axis, and connected to the housing. It is shorter set than the distance to the rotational axis from the connecting position of the connecting cables,
Connection cable arranged spirally around the axis of rotation to form a helical spiral, when the connection cable during forward and reverse rotation of the rotating shaft is returned winding Ri around a rotation axis, the cable holding lever from the actuated member connection cable between the is characterized in that back gently winding Rimaki while maintaining the spiral about the axis of rotation.

  As described above, the conventional connection cable is wound at the same rotational speed as the rotating shaft while being pulled out from the actuated body attached to the rotating shaft. May break.

  However, according to the above configuration, the connection cable wound at the same rotational speed as the rotation shaft is fixed at the tip of the cable holding lever in the middle of the cable, and the cable holding lever is rotated by the speed reduction mechanism. Since the rotation speed is further reduced, a difference occurs in the rotational speed between the connection portion of the actuated body (cable drawing portion) and the fixing portion of the cable holding lever. Therefore, the cable between the actuated body and the cable holding lever is forcibly sent out in the direction of rotation of the rotating shaft by the cable holding lever more slowly than the rotation of the rotating shaft. The problem that the cable is tightened to the rotating shaft is eliminated. Also, when the connecting cable is rewound by rotating the rotating shaft in the reverse direction, the cable holding lever rotates at a moderate rotational speed and the cable is pulled out from the winding portion, so that the problem that the connecting cable becomes entangled is solved. Therefore, when winding or unwinding the connection cable, the load applied to the connection cable can be reduced, and disconnection or the like can be prevented.

  In the case where an intermediate shaft (for example, the second rotation shaft) is arranged in parallel with the rotation shaft and a speed reduction mechanism is provided across the rotation shaft and the intermediate shaft, the following transmission mechanism can be used.

Contact transmission mechanism (1-1) Gear transmission mechanism Two sets of gear trains are provided across the rotating shaft and the intermediate shaft. When increasing the reduction ratio, the two sets of gear trains may be configured as a turn-back planetary gear train or the like.
(1-2) Friction transmission mechanism Two sets of friction wheels are provided across the rotating shaft and the intermediate shaft.

Winding transmission mechanism (2-1) Belt transmission mechanism Two belt transmission structures are provided across the rotating shaft and the intermediate shaft.
(2-2) Rope transmission mechanism Two sets of rope transmission structures are provided across the rotating shaft and the intermediate shaft.
(2-3) Wire transmission mechanism Two sets of wire transmission structures are provided across the rotating shaft and the intermediate shaft.
(2-4) Chain transmission mechanism Two sets of chain transmission structures are provided across the rotating shaft and the intermediate shaft.

  Further, the speed reduction mechanism is connected to the rotating shaft at the end opposite to the side where the actuated body is located, and when the connecting cable is wound around the rotating shaft, the connecting cable ahead of the cable holding lever is connected to the rotating shaft. It can be set as the structure by which diameter reduction is gradually accommodated as this rotation.

Since the speed reduction mechanism is positioned on the opposite side of the driven body, the connection cable between the cable holding lever arranged in the speed reduction mechanism and the driven body is reduced in diameter due to the rotation of the rotary shaft and is directed toward the rotation axis. Rolled up.
On the other hand, the connection cable fixed to the cable holding lever and housed in a spiral shape before the cable holding lever is connected when the cable holding lever rotates in the direction of rotation of the rotating shaft due to the rotation of the rotating shaft. Since it is driven by a cable holding lever that is fixed in the middle of the cable, even if the connecting cable ahead of the diameter of the cable holding lever is retracted due to this rotation, tightening or the like does not occur.

  In addition, it is located closer to the body to be actuated than the cable holding lever, and the distal end is projected from the proximal end located on the rotation axis side toward the outside in the radial direction, and is connected by a guiding portion extending from the proximal end to the distal end A cable guide lever that guides and guides the cable toward the body to be driven can be provided, and the connection cable can be fixed only to the cable holding lever.

  As described above, it is composed of two levers, the cable holding lever and the cable guiding lever, and the connection cable is fixed only to the cable holding lever located at a position away from the actuated body among the two levers. Therefore, the middle part of the connection cable from the actuated body wound around the rotating shaft to the cable holding lever is wound around the rotating shaft while being supported by the cable guiding lever. In this way, the cable guide lever is positioned between the actuated body and the cable holding lever, so that the cable is guided and guided by the guide portion of the cable guide lever, and the cable is naturally guided according to the rotation of the rotating shaft. Is effective in preventing the cable from being tightened.

  Specifically, the cable holding lever and the cable guiding lever are fixed to the same reduction rotation member in the reduction mechanism, and when the rotation shaft rotates, the two levers rotate together and rotate between the two levers. It can be set as the structure where the angle difference of a direction is constant.

  As described above, the function of the cable guide lever is to guide the connection cable closer to the actuated body than the cable holding lever, and the cable guide lever is expected to guide the connection cable in the winding direction while supporting the connection cable. Is done. For this reason, it is necessary to rotate the cable guide lever as well as the cable holding lever. However, since the connection cable that is not fixed is guided while sliding on the cable guide lever, the cable guide lever is also installed together with the cable holding lever. Its function can be maintained even if it rotates. In this case, since the installation location in the speed reduction mechanism can be the same position, even if a new cable guide lever is added, the structure does not become complicated, and a simple speed reduction mechanism can be used.

  More specifically, the cable holding lever is fixed to the speed reduction rotating member in the speed reduction mechanism, and the cable guide lever is fixed to the rotation member before speed reduction in the speed reduction mechanism. It can also be set as the structure which rotates relatively rapidly with respect to a holding lever, and the angle difference of the rotation direction between both levers changes.

  As described above, the cable guiding lever guides the winding of the connection cable to the rotating shaft by the guiding portion of the cable guiding lever, but the speed of the connecting cable winding rotation relative to the rotation of the rotating shaft is the cable holding lever. Is slower than the rotation of the rotating shaft by the speed reduction mechanism, so that the rotation of the actuated body becomes faster. Therefore, in order to rotate the cable guide lever faster than the cable holding lever decelerated by the speed reduction mechanism, the cable guide lever is fixed to the rotating member before the speed reduction rotation in the speed reduction mechanism of the cable holding lever. If the cable can be rotated, the connection cable guided by the cable guide lever is not fixed, but it is guided by the cable guide lever in the direction of winding the rotary shaft. If tightened, further tightening will not occur.

  In addition, a bent portion that changes direction toward the direction of the actuated body is formed on the distal end side of the cable guide lever, and the bent portion prevents the connection cable guided by the cable guide lever from falling off. You can also

  Since the bent part is formed at one end of the cable guiding lever, even if the connection cable moves due to rotation of the rotating shaft, the movement is suppressed at the bent part, and the cable is bent. It can prevent being thrown out of the department. The shape of the bent portion is not limited to the L shape, but can be a U shape or a U shape, and can be changed as appropriate.

  Further, the speed reduction mechanism can be constituted by a gear speed reduction mechanism including two sets of gear trains provided between a rotation shaft and an intermediate shaft arranged in parallel with the rotation shaft.

  By using a gear reduction mechanism including two sets of gear trains, the rotation from the rotating shaft can be reliably reduced while having a small and simple structure.

  Furthermore, when the rotation angle of the rotating shaft is X °, the speed reduction mechanism can be configured so that the rotation angle of the cable holding lever is (X / 2) °.

As in the above configuration, the rotation angle of the cable holding lever is rotated by half of the rotation angle of the rotating shaft, so that there is a gap between the connection part of the actuated body and the fixing part of the cable holding lever. Causes a difference in the amount of rotation (rotation angle), and the cable can be gently wound and rewound by the difference. In addition, since the rotation amount (rotation angle) of the prime mover (for example, the electric motor) is doubled with respect to the rotation amount (rotation angle) of the cable holding lever, it is It is also possible to control the stop position of the operating body more precisely.
For example, when the rotation range of the rotation shaft is 360 °, the rotation angle of the cable holding lever becomes 180 °, and the rotation angle becomes large, and the speed reduction mechanism can be arranged at an angular position where the cable holding lever does not rotate.

  When the above gear reduction mechanism is employed, the diameter of the gears constituting each gear train is such that the reduction ratio of one gear train is 1: 1 and the reduction gear ratio of the other gear train is 2: 1. (Or the number of teeth) is set, and the base end portion of the cable holding lever can be fixed to the reduction gear of the reduction-side gear train.

  Further, the connection cable, the cable holding lever, and the speed reduction mechanism may be housed in a housing, and the actuated body may be installed in the housing so as to be rotatable around the rotation axis via a rotation assisting tool.

  By setting it as such a structure, a to-be-actuated body can be rotated, being stably hold | maintained via a rotation auxiliary tool. In addition, since there is a housing (storage case) that includes a connection cable, cable holding lever, and speed reduction mechanism inside, it is possible to prevent the connection cable that is gently wound and unwound from coming into contact with other objects, such as sunlight. It is also possible to protect the internal parts from.

  In addition, a camera whose imaging direction can be changed by rotation of a rotating shaft is installed in the actuated body, and the connection cable can be configured to transmit and receive signals to and from the camera.

  When the camera is installed on the actuated body, the connection cable is less tight and entangled when the rotating shaft rotates forward and backward, so that the camera can be rotated smoothly and shooting in that direction can be performed easily.

It is front sectional drawing which shows the winding-up rewinding structure of the cable of 1st Example. It is front sectional drawing which shows the winding / unwinding structure of the cable of 2nd Example. It is the front view which showed two levers and the gear reduction mechanism of 2nd Example. It is the top view which showed the positional relationship of the connection cable and the 1st, 2nd lever before and behind rotating the rotating shaft of 2nd Example. It is the figure which showed the form of the front-end | tip part of a lever. It is front sectional drawing which shows the winding / unwinding structure of the cable of 3rd Example. It is the front view which showed two levers and the gear reduction mechanism of 3rd Example. It is the top view which showed the positional relationship of a connection cable and a 1st, 2nd lever when rotating the rotating shaft of 3rd Example. It is a front schematic diagram which shows the winding / unwinding structure of the cable of 4th Example. It is the front view which showed two levers and the gear reduction mechanism of 4th Example. It is the top view which showed the positional relationship of the connection cable of 4th Example, and a 1st, 2nd lever. It is a figure which shows a prior art example.

  Embodiments of the present invention will be described below with reference to the drawings.

  In FIG. 1, the cable winding / unwinding structure of the first embodiment will be described. FIG. 1 is a front sectional view showing a cable winding / rewinding structure. The rotary shaft 3 is driven by an electric motor 1 (prime mover) located at the lower end, and rotates forward and backward around the rotation axis O of the rotary shaft 3. The actuated body 5 is fixed to the upper end of the rotating shaft 3 and rotates integrally with the rotating shaft 3 (rotating axis O). Further, the connection cable 7 connected at the connection portion 10 of the actuated body 5 and drawn downward is disposed around the rotating shaft 3 in a spiral shape.

  A gear reduction mechanism 9 (deceleration mechanism) for decelerating the rotation of the rotary shaft 3 is installed inside the gear case 30 fixed to the bottom (lower) of the storage case 2 (housing). Of the four gears constituting the gear reduction mechanism 9, the base end portion of the first lever 11 (cable holding lever) is joined to the upper surface of the fourth gear 24 (reduction rotating member, reduction gear) by the joining portion 14. .

  The first lever 11 has a distal end portion that protrudes radially outward from a proximal end portion located on the rotation axis O side, and a holding portion 51 is formed horizontally from the proximal end portion toward the distal end portion. Yes. In addition, a fixing portion 13 for fixing a midway portion of the connection cable 7 is formed at the distal end portion of the first lever 11. The first lever 11 can be rotated coaxially with the rotary shaft 3.

  According to the above configuration, the connecting cable 7 wound around the rotating shaft 3 at the same rotational speed as the rotating shaft 3 is fixed at the distal end portion of the first lever 11 by the fixing portion 13 in the middle of the cable 7. The 1 lever 11 is rotated by being decelerated from the rotation of the rotary shaft 3 by the speed reduction mechanism 9. Causes a difference in rotational speed. Therefore, the cable 7 between the actuated body 5 and the first lever 11 is forcibly sent out in the rotation direction of the rotary shaft 3 by the first lever 11 in the middle of the cable 7. The problem of tightening on the rotating shaft 3 is eliminated.

  Further, when the connecting cable 7 is rewound by rotating the rotating shaft 3 in the reverse direction, the first lever 11 rotates at a moderate rotational speed and the cable 7 is pulled out from the winding portion. It will be resolved.

  Therefore, when winding or unwinding the connection cable 7, the load applied to the connection cable 7 can be reduced, and disconnection or the like can be prevented.

  Further, the connection cable 7 arranged in a spiral shape on the storage case 2 side ahead of the fixing portion 13 of the first lever 11 is located outside the gear reduction mechanism 9 and is in a direction of winding the connection cable 7. When rotating, the connection cable 7 is gently wound around the gear reduction mechanism 9 while narrowing the diameter, and the connection cable 7 is not tightly wound around the gear reduction mechanism 9.

  Here, the actuated body 5 is installed in the storage case 2 so as to be rotatable around the rotation axis O via a rolling bearing 42 (rotation auxiliary tool), and the connection cable 7, the first lever 11, the gear case 30, and the like are stored. Housed in the case 2. In addition, a camera 40 whose imaging direction can be changed by the rotation of the rotary shaft 3 is installed above the actuated body 5.

  FIG. 2 is a front cross-sectional view showing a cable winding / rewinding structure of the second embodiment. With reference to FIG. 2, the cable winding / unwinding structure of the second embodiment will be described. The base end portions of the first lever 11 (cable holding lever) and the second lever 12 (cable guide lever) are joined to the lower surface and the upper surface of the reduction gear 24 constituting the gear reduction mechanism 9, respectively. The levers 11 and 12 can rotate on the same axis as the rotation axis. The distal ends of the levers 11 and 12 are arranged so as to protrude radially outward from the rotational axis O with a certain angular difference α (see FIG. 4). A fixing portion 13 for fixing the portion is formed.

  FIG. 3 is a front view showing the two levers and the gear reduction mechanism of the second embodiment. Of the two levers, the lower lever (located on the side away from the actuated body 5) is the first lever. The first lever 11 and the lever located on the upper side are referred to as a second lever 12. The first lever 11 and the second lever 12 are joined to the fourth gear 24 (a reduction rotation member, a reduction gear) that is a part of the gear reduction mechanism 9 at the joints 14 and 14. The two levers 12 have a certain height difference A (distance in the direction of the rotation axis O).

  The gear reduction mechanism 9 includes two sets of gear trains provided between the rotary shaft 3 and the second rotary shaft 20. The upper gear train is composed of a first gear 21 that rotates integrally with the rotating shaft 3 (a rotating member before deceleration, a non-reducing gear), and a second gear 22 that rotates integrally with the second rotating shaft 20. 21 and 22 rotate at the same speed because of the combination of the same diameter (the same number of teeth). The lower gear train includes a third gear 23 that rotates integrally with the second rotary shaft 20, and a fourth gear 24 (decelerated rotation) that can be rotated relative to the rotary shaft 3 by being held by the rotary shaft 3 via a bearing 28. Member, reduction gear). Here, since the diameter (the number of teeth) of the fourth gear 24 is set to be twice the diameter (the number of teeth) of the third gear 23, the fourth gear 24 rotates at a speed half that of the rotary shaft 3. To do.

  As described above, the joints 14 and 14 of the first and second levers 11 and 12 are fixed to the lower surface and the upper surface of the reduction gear 24 of the lower gear train, respectively. In addition, a fixing portion 13 that fixes the middle portion of the connection cable 7 is formed at the tip of the lower first lever 11. Therefore, if the rotation angle of the rotating shaft 3 is X ° (for example, 280 °), the rotation angle of the first lever 11 is (X / 2) ° (for example, 140 °) (see FIG. 4).

  Here, with reference to a plan view showing the positional relationship between the connection cable and the first and second levers before and after the rotating shaft of FIG. 4 is rotated, the overall operation at the time of winding the cable in the second embodiment will be described. . First, when the electric motor 1 is driven in the winding direction, the rotating shaft 3 connected to the electric motor 1 rotates, and the actuated body 5 (connecting portion 10) fixed to the rotating shaft 3 rotates integrally. . Since the camera 40 is installed on the actuated body 5, the camera 40 also rotates in the same manner as the actuated body 5. On the other hand, the first lever 11 (fixed portion 13) rotates at a speed that is ½ of the rotation angle of the rotary shaft 3 by the gear reduction mechanism 9 (reduction gear 24). There is a difference in (rotational speed). Therefore, the connecting portion-fixed portion cable 15a is gently wound around the rotating shaft 3, and the phenomenon of tightness to the rotating shaft 3 does not occur. Further, the cable 15b ahead of the fixed portion is reduced in diameter as the rotary shaft 3 rotates. (Refer to Fig. 4 (a) → (b))

  At the time of rewinding, when the electric motor 1 is driven in the rewinding direction (reverse to winding), the rotating shaft 3 and the actuated body 5 (connecting portion 10) are rotated in reverse (the camera 40 is also the same). On the other hand, since the first lever 11 (fixed portion 13) rotates at a reduced speed by the gear reduction mechanism 9 (reduction gear 24), the cable 15a between the connecting portion and the fixed portion is gently rewound from the rotary shaft 3 to rotate the rotary shaft. No entanglement phenomenon to 3 occurs. In addition, the cable 15b ahead of the fixed portion is expanded in diameter when the rotary shaft 3 rotates in the reverse direction. (See FIG. 4 (b) → (a))

  Thus, since the connection cable 7 is wound up at the same rotational speed as that of the rotary shaft 3, the connection cable 7 is wound around the rotary shaft 3 while being tightened, and when the connection cable 7 is tightened, a load is applied and the wire may be broken. However, as shown in FIG. 2, the connection cable 7 is fixed in the middle by a fixing portion 13 of the first lever 11 joined to a part of the speed reduction mechanism 9 housed in the gear case 30 by the joining portion 14. . With this configuration, the first lever 11 is rotated by being decelerated from the rotation of the rotary shaft 3 by the speed reduction mechanism 9, so that there is a difference in rotational speed between the connection portion 10 of the actuated body 5 and the fixing portion 13 of the first lever 11. Occurs. Due to this difference in rotational speed, the connection cable 7 between the actuated body 5 and the first lever 11 can rotate gently, and the connection cable 7 does not tighten on the rotary shaft 3.

  Also, when the connecting shaft 7 is rewound by rotating the rotating shaft 3 in the reverse direction, the cable feeding lever 11 moves at a gentle rotational speed, so that the connecting cable 7 is not tangled and an extra force is not applied to the cable.

  As shown in FIG. 3, there is a certain height difference A between the first lever 11 located on the side away from the actuated body 5 and the second lever 12 located on the upper side, as shown in FIG. Since the first lever 11 and the second lever 12 have a certain angular difference α, the connection cable 7 is stably supported in an oblique direction, so that the connection cable 7 can be wound more gently.

  Further, by setting the length of the second lever 12 positioned at the upper part of the first lever 11 and the second lever 12 to be short, the connection cable 7 supported by the second lever 12 has a distance from the rotating shaft 3. It becomes close and can be easily wound on the rotary shaft 3. Further, the connection cable 7 is wound so that the cable 15a between the connection part and the fixed part faces in the direction of the arrow shown in FIG. 4, and the cable 15b ahead of the fixed part is reduced in diameter as the first lever 11 rotates. It is wound up. Here, since the gear case 30 is connected by the support rod 31, the rotation of the lever is limited to the range up to the support rod 31, but there is no particular problem with a mechanism that does not require a large rotation angle such as one rotation or more. .

  Next, the shape of the tip of the lever will be described with reference to FIGS. FIG. 5A functions as the first lever 11, and the connection cable 7 is fixed by the fixing portion 13. FIG. 5B shows a lever having a bent portion 16 formed at the tip, which functions as the second lever 12 that supports the connecting portion-fixing portion cable 15a. If the fixing portion 13 is provided, the first lever 11 can be used. Here, the fixing portion 13 may have another form capable of stopping the cable 7.

  In the lever 11 of FIG. 5A, the connection cable 7 is fixed by the fixing portion 13, so that the cable does not move up and down, left and right. Further, the lever 12 in FIG. 5 (b) can stop the movement of the cable 7 by the bent portion 16 even when the cable 7 is displaced in the lateral direction, restricts the free movement of the cable 7, and Can make disciplined movements.

  FIG. 6 is a front sectional view showing a cable winding / rewinding structure of the third embodiment. The third embodiment differs from the second embodiment in that, among the four gears constituting the gear reduction mechanism 9, the second lever 12 (cable guide) is provided on the upper surface of the first gear 21 (rotating member before reduction, non-reduction gear). The base end of the lever is joined by the joint 14. The base end portion of the first lever 11 (cable holding lever) is joined to the upper surface of the fourth gear 24 (deceleration rotating member, reduction gear) at the joint portion 14 as in the first and second embodiments.

  The levers 11 and 12 each have a distal end projecting radially outward from a base end located on the rotation axis O side, and horizontally holding portion 51 and guide portion from the base end toward the distal end. 52 is formed. Both levers 11 and 12 can be rotated coaxially with the rotary shaft 3 (see FIG. 7).

  FIG. 7 is a front view showing the two levers and the gear reduction mechanism of the second embodiment. Of the two levers, the lower lever (located on the side away from the actuated body 5) is the first lever. The first lever 11 and the lever located on the upper side are referred to as a second lever 12. As shown in FIG. 7, the first lever 11 and the second lever 12 are joined at the joint portion 14 with a fourth gear 24 (a reduction rotating member, a reduction gear) and a first gear 21 ( The first lever 11 and the second lever 12 have a certain height difference A (distance in the direction of the rotation axis O).

  Further, a bent portion 16 is formed at the tip of each lever 11, 12 and is bent in the direction of the actuated body 5 (upward). And since the connection cable 7 can be divided by the connection part 10 of the to-be-actuated body 5 to the fixing | fixed part 13 of the 1st lever 11, and ahead of the fixing | fixed part 13 (refer FIG. 6, FIG. 8), it connects each. The cable 15a between the part and the fixed part is the cable 15b ahead of the fixed part. Here, the connecting portion-fixing portion cable 15a is guided and supported by the guiding portion 52 inside the bent portion 16 of the second lever 12 positioned above and fixed by the fixing portion 13 of the first lever 11 positioned below. (See FIGS. 6 and 8).

  Further, as shown in FIG. 7, the upper and lower fixed support plates 30a and 30b having a hexagonal shape in plan view constituting the gear case 30 are held at predetermined intervals by a plurality of (for example, four) support rods 31 (see FIG. 8). The gear reduction mechanism 9 is disposed therebetween. On the fixed support plates 30 a and 30 b, the second rotary shaft 20 (intermediate shaft) is arranged in parallel with the rotary shaft 3 in a form that can rotate via the bearing 27. Reference numeral 26 denotes a bearing for rotatably supporting the rotary shaft 3 with respect to the fixed support plates 30a and 30b.

  The gear reduction mechanism 9 includes two sets of gear trains provided between the rotary shaft 3 and the second rotary shaft 20. The upper gear train is composed of a first gear 21 (non-reduction gear) that rotates integrally with the rotary shaft 3 and a second gear 22 that rotates integrally with the second rotary shaft 20, and both gears 21 and 22 have the same diameter. It rotates at the same speed because of the combination of (the same number of teeth). The lower gear train includes a third gear 23 that rotates integrally with the second rotating shaft 20, and a fourth gear 24 (reduction gear) that can be rotated relative to the rotating shaft 3 by being held on the rotating shaft 3 via a bearing 28. ). Here, since the diameter (the number of teeth) of the fourth gear 24 is set to be twice the diameter (the number of teeth) of the third gear 23, the fourth gear 24 rotates at a speed half that of the rotary shaft 3. To do.

  As already described, the joints 14 and 14 of the first and second levers 11 and 12 are fixed to the upper surface of the reduction gear 24 of the lower gear train and the upper surface of the non-reduction gear 21 of the upper gear train, respectively. Moreover, the fixing | fixed part 13 which fixes the middle part of the connection cable 7 is formed in the front-end | tip part of the lower 1st lever 11 (refer Fig.5 (a)). Therefore, if the rotation angle of the rotating shaft 3 is X ° (for example, 100 °), the rotation angle of the first lever 11 is (X / 2) ° (for example, 50 °) (see FIG. 8).

  Here, the overall operation at the time of winding the cable of the third embodiment will be described with reference to a plan view showing the positional relationship between the connection cable and the first and second levers when the rotating shaft of FIG. 8 is rotated. First, when the electric motor 1 is driven in the winding direction, the rotating shaft 3 connected to the electric motor 1 rotates, and the actuated body 5 (connecting portion 10) fixed to the rotating shaft 3 rotates integrally. . Since the camera 40 is installed on the actuated body 5, the camera 40 also rotates in the same manner as the actuated body 5.

  On the other hand, the movement of the first lever 11, the second lever 12, and the cable 7 will be described with reference to FIGS. In the initial state of FIG. 8A, the initial setting angle between the first lever 11 and the second lever 12 is 50 °. The cable 7 is fixed to the fixing portion 13 of the first lever 11 in the middle thereof, and the connecting portion-fixing portion cable 15a is guided by the guiding portion 52 of the second lever 12 positioned above the first lever 11. It is held and connected to the connecting portion 10 while being arranged in a spiral shape.

  From the initial state to the intermediate state (FIG. 8 (a) → (b)), the rotary shaft 3 rotates 100 ° clockwise. At this time, the second lever 12 fixed to the non-reduction gear 21 rotates 100 ° in the clockwise direction similarly to the rotating shaft 3, and the first lever 11 fixed to the reduction gear 24 is 1/2. Rotate 50 ° which is the angle of. In other words, the second lever 12 rotates relatively fast with respect to the first lever 11 when the rotating shaft 3 rotates, and the angle between the levers 11 and 12 becomes 0 ° (overlap). The connecting portion-fixing portion cable 15a is on the guiding portion 52 as in the case of FIG. 8A, and the cable 7 is guided to the rotation of the rotary shaft 3 when changing as described above. Guided while sending out.

  Next, from the intermediate state to the final state (FIG. 8 (b) → (c)), the rotating shaft 3 is further rotated by 100 °. At this time, the second lever 12 rotates by 100 ° and the first lever 11 rotates by 50 ° as in FIGS. Also in this case, the second lever 12 rotates relatively fast with respect to the first lever 11, and the angle between the levers 11 and 12 is 50 °. When the rotary shaft 3 rotates, the connecting portion-fixed portion cable 15a guides the cable 7 while feeding the cable 7 through the guide portion 52 in accordance with the rotation of the rotary shaft 3.

  Here, the first lever 11 and the second lever 12 overlap when the angle between the levers becomes 0 °, but the tip of the second lever 12 is located inside the tip of the first lever 11, and the second lever 12 is Since it exists above the 1st lever 11, both levers 11 and 12 do not contact. Further, by setting the length of the second lever 12 to be short, the connection cable 7 supported by the second lever 12 becomes closer to the rotating shaft 3 and can be easily wound on the rotating shaft 3. .

  As described above, the first lever 11 rotates at a speed lower than the rotational speed of the rotary shaft 3, and the second lever 12 rotates relatively fast with respect to the first lever 11, so that the first lever 11 rotates as the rotary shaft 3 rotates. Since the cable 7 forcedly sent out by the one lever 11 is further sent out while being guided by the guide portion 52 of the second lever 12, the cable 7 does not get loose and entangled in the middle. Can be wound up. Here, according to the initial setting angles of the first lever 11 and the second lever 12, cables of various cable lengths can be stably guided.

  At the time of rewinding, when the electric motor 1 is driven in the rewinding direction (reverse to winding), the rotating shaft 3 and the actuated body 5 (connecting portion 10) are rotated in reverse (the camera 40 is also the same).

  On the other hand, the movement of the first lever 11, the second lever 12, and the cable 7 during rewinding will be described with reference to FIGS. In the final state of FIG. 8C, the angle between the first lever 11 and the second lever 12 is 50 °. The cable 7 is fixed to the fixing portion 13 of the first lever 11 in the middle thereof, and the cable 15a between the connection portion and the fixing portion is guided and held by the guide portion 52 of the second lever 12, and is arranged in a spiral shape. It is connected to the connection unit 10.

  From the final state to the intermediate state (FIG. 8 (c) → (b)), the rotating shaft 3 rotates 100 ° counterclockwise. At this time, the second lever 12 fixed to the non-reduction gear 21 rotates 100 ° counterclockwise in the same manner as the rotary shaft 3, and the first lever 11 fixed to the reduction gear 24 is 1 / The angle between the levers 11 and 12 is 0 ° (overlapping) in an intermediate state.

  Further, the rotating shaft 3 rotates 100 ° counterclockwise from the intermediate state to the initial state (FIG. 8B → (a)). At this time, the second lever 12 is rotated by 100 ° and the first lever 11 is rotated by 50 ° in the same manner as in FIG. 8 (c) → (b), so that the angle between the levers 11 and 12 is 50 °. Become.

  As described above, the first lever 11 rotates at a speed lower than the rotational speed of the rotary shaft 3, and the second lever 12 rotates relatively fast with respect to the first lever 11, so that the cable is rotated as the rotary shaft 3 rotates. Even if the cable 7 is pulled out from the rotary shaft 3, the cable 7 is pulled out while being guided by the guide portion 52 of the second lever 12, so that the cable 7 can be pulled out slowly, and the cable 7 does not become too loose. .

  Here, the cable 15b ahead of the fixed portion is reduced in diameter when the rotating shaft 3 rotates clockwise (winding rotation), and expanded when counterclockwise (rewinding rotation). .

  Further, since the bent portions 16 are formed on the levers 11 and 12 (see FIG. 7), the cable 7 is wound around the rotary shaft 3 when the cable 7 is wound or unwound. Can suppress movement.

  Furthermore, it is optimal by changing the reduction ratio of the speed reduction mechanism 9 to change the relative rotational movement of the first lever 11 and the second lever 12 or changing the initial setting angle of the first lever 11 and the second lever 12. It is possible to realize winding and rewinding of the cable 7.

  Here, a new lever may be provided between the first lever 11 and the second lever 12 so as to rotate at a speed between the rotation speeds of the first lever 11 and the second lever 12. By setting it as such a structure, the lever from which a rotational speed becomes slow gradually from the top can be arrange | positioned, and winding-up and unwinding of the connection cable 7 can be performed further gently.

  5 (c) to 5 (e) show other forms of the tip of the cable feed lever, (c) is a bent portion 17 bent at two sides, and (d) is a bent portion at three sides. Portions 18 and (e) show bent portions 19 bent in an arc shape, and can function as the first lever 11 and the second lever 12, respectively. When functioning as the second lever 12, the lateral displacement of the cable 7 can be prevented, and when functioning as the first lever 11, the cable 7 can be fixed by caulking the cable 7 itself. it can. Moreover, not only what is shown here but the form of a lever can be changed suitably.

  9 to 11 show a fourth embodiment, FIG. 9 is a schematic front view showing a cable winding / unwinding structure, FIG. 10 is a front view showing two levers and a gear reduction mechanism, and FIG. 11 is a connection diagram. It is the top view which showed the positional relationship of a cable and a 1st, 2nd lever. The first lever 11 (cable holding lever) and the second lever 12 (cable guiding lever) shown in FIG. 11 are arranged at an upper portion of the gear case 30 so as to exceed 360 °. (However, the illustration of the second lever 12 is omitted in FIG. 9).

  Specifically, in the gear reduction mechanism 9 (reduction mechanism) shown in FIG. 10, the vertical relationship between the two sets of gear trains is arranged opposite to that in the first to third embodiments (FIGS. 1, 2, and 6). . Further, the first and second levers 11 and 12 are fixed to the upper surface of the fourth gear 24 (reduction gear) that constitutes the upper gear train by the joint portions 14 and 14, and the tip ends of the levers 11 and 12. The portion extends to the outside of the gear case 30. Since the tip ends of the two levers 11 and 12 are located outside the gear case 30, unlike the first to third embodiments, the first lever 11 and the second lever 12 can be rotated by 360 ° or more. Yes. The operational effects in the positional relationship between the bent portion 16 and the two levers are the same as in the second embodiment (see FIG. 2).

  As shown in FIG. 11, when the rotary shaft 3 rotates 360 ° or more in the winding direction, the first lever 11 rotates at a reduced speed of 180 ° or more. The cable 15a between the connection portion and the fixed portion is wound in the direction of the arrow, and the cable 15b ahead of the fixed portion is gradually wound in the circumferential direction of the gear case 30, and the cable is scattered and entangled. Absent. At the time of rewinding, the cable is gently rewound in the reverse manner of winding.

  However, in FIG. 10, the bearing 26 for rotatably supporting the rotary shaft 3 on the gear case 30 is shown as a type that is erected and held at one place. A bearing 26 may be disposed at the end.

  The cable winding / rewinding structure shown in the first to fourth embodiments can be used as, for example, a weather camera or a satellite camera for observing the surrounding weather, but requires another cable winding / rewinding structure. It can also be mounted on machines.

  In the third and fourth embodiments (FIGS. 6 to 11), parts having the same functions as those in the first and second embodiments (FIGS. 1 to 5) are denoted by the same reference numerals, and detailed description will be given. Is omitted. 3, 7, and 10, the intermediate shaft 20 is fixed to the gear case 30, the bearing 27 is provided on each of the second gear 22 and the third gear 23, and both the gears 22 and 23 are coupled so as to be integrally rotatable. May be. Even if comprised in this way, the 4th gearwheel (reduction gear) can be decelerated and rotated at the speed of 1/2 of the rotating shaft 3.

1 Electric motor (motor)
2 Storage case (housing)
3 Rotating shaft 5 Actuator 7 Cable (connection cable)
9 Gear reduction mechanism (reduction mechanism)
11 First lever (cable holding lever)
12 Second lever (cable guide lever)
20 Second rotating shaft (intermediate shaft)
21 1st gear (rotating member before deceleration, non-reducing gear)
22 2nd gear 23 3rd gear 24 4th gear (reduction rotation member, reduction gear)
30 Gear case 40 Camera 42 Rolling bearing (rotation aid)
51 Holding part 52 Guide part O Rotation axis

Claims (10)

A prime mover connected to the bottom side of the housing;
A rotary shaft for forward and reverse rotation driven by the prime mover,
An actuated body that is disposed on the upper side of the housing and is attached to the rotating shaft and rotates around a rotating axis ;
End is drawn from the activated body and the other end connected to the bottom of the housing, and a connection cable which is arranged spirally around the rotary shaft,
A speed reduction mechanism that is installed on the bottom side of the casing and connected to the rotating shaft driven by the prime mover, and decelerates rotation of the rotating shaft;
Wherein the proximal end portion positioned on the rotational axis side with the distal end portion toward the radial direction outside is projected arranged, and a cable holding lever at a reduced speed around the rotational axis via the reduction mechanism,
Middle of the connecting cable is fixed to the cable holding levers, the distance from the fixed position to the axis of rotation, longer than the distance from the connecting position of the connecting cable led out from the activated body to said rotation axis And it is set shorter than the distance from the connection position of the connection cable connected to the housing to the rotation axis ,
Wherein arranged spirally about an axis of rotation connecting cable forms a helical spiral, when the connection cable during forward and reverse rotation of said rotary shaft is returned winding Ri wound to the rotating shaft, the object to be the connecting cable between the cable holding lever from the actuating member returns reeling of cable, characterized in that back gently winding Rimaki while maintaining the spiral around said rotary shaft structure. The speed reduction mechanism is connected to the rotating shaft at the end opposite to the side where the actuated body is located,
2. The cable winding according to claim 1, wherein when the connection cable is wound around the rotary shaft, the connection cable ahead of the cable holding lever is gradually reduced in diameter as the rotary shaft rotates. Rewind structure.   A guide portion that is located closer to the actuated body than the cable holding lever and that protrudes radially outward from a base end located on the rotation axis side and extends from the base end to the tip. The cable according to claim 1, further comprising a cable guide lever that guides and guides the connection cable toward the actuated body, wherein the connection cable is fixed only to the cable holding lever. Winding / rewinding structure.   The cable holding lever and the cable guiding lever are fixed to the same speed reduction rotating member in the speed reduction mechanism, and when the rotary shaft rotates, the two levers rotate together and the rotation direction between the two levers. The cable winding and unwinding structure according to claim 3, wherein the angle difference between the two is constant.   The cable holding lever is fixed to a reduction rotation member in the reduction mechanism, and the cable guide lever is fixed to a rotation member before deceleration in the reduction mechanism, and the cable guide lever is 4. The cable winding / unwinding structure according to claim 3, wherein the cable winding lever rotates relatively fast with respect to the cable holding lever, and an angular difference between the two levers changes. On the distal end side of the cable guiding lever, a bent portion that changes direction toward the direction of the actuated body is formed,
The cable winding / unwinding structure according to any one of claims 3 to 5, wherein the bent portion prevents the connection cable guided by the cable guiding lever from falling off.   2. The speed reduction mechanism is constituted by a gear speed reduction mechanism including two sets of gear trains provided between the rotation shaft and an intermediate shaft arranged in parallel with the rotation shaft. The cable winding / unwinding structure according to any one of items 1 to 6.   The speed reduction mechanism is configured so that the rotation angle of the cable holding lever is (X / 2) ° where the rotation angle of the rotation shaft is X °. The cable winding / unwinding structure according to claim 1.   The connection cable, the cable holding lever, and the speed reduction mechanism are housed in a housing, and the actuated body is installed in the housing so as to be rotatable around the rotation axis via a rotation assisting tool. The cable winding / unwinding structure according to any one of claims 1 to 8.   2. The actuated body is provided with a camera whose imaging direction can be changed by rotation of the rotating shaft, and the connection cable is for transmitting and receiving signals to and from the camera. The cable winding / unwinding structure according to any one of Items 9 to 9.

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