JP6085840B2 - Cable feeding device - Google Patents

Description

  The present invention relates to a cable delivery device that feeds a cable between a pair of gripping portions.

Conventionally, as a cable delivery apparatus, there exists a thing of the structure described in patent document 1, for example. The cable delivery device described in Patent Document 1 has a pair of delivery rollers, and these pair of delivery rollers rotate in opposite directions to deliver a cable sandwiched therebetween. The feed rollers are respectively supported by a fixed pivot and a movable pivot movable with respect to the fixed pivot, and chain gears are respectively fixed to the pivots, and between these chain gears, idler gears, and guide gears. The chain is hung. When the chain gear fixed to the fixed pivot is rotated, the chain gear transmits the rotation, and the working pivot rotates, whereby the feed roller rotates.
Further, when the movable pivot is moved close to or away from the fixed pivot in order to adjust the distance between the pivots, the slack of the chain gear caused by the movement of the movable pivot is absorbed by the idler gear and the guide gear.

Japanese Patent No. 2860786

  However, in the cable delivery device having the above-described structure, the chain gear is wound around many gears in order to absorb the slack of the chain when adjusting the distance between the pivots. For this reason, the entire length of the chain becomes long, and it becomes easy to apply tension to the chain on the pulling side of the chain, and torque loss related to transmission is likely to occur. On the other hand, on the slack side of the chain, the chain becomes easier to sag, and when the chain extends over time, the gear is disengaged, and the chain tends to idle. In order to prevent this, the tension of the chain must be adjusted frequently, and the maintenance frequency increases.

  An object of the present invention is to provide a cable feeding device that minimizes torque loss and chain slack and is easier to maintain.

  In order to achieve the above object, the cable delivery device of the present invention is disposed so as to face each other, and supports a pair of gripping parts for sending the cable between them, and one of the pair of gripping parts, The fixed side rotation shaft provided rotatably at a predetermined position and the other of the pair of gripping portions are supported and rotatable, and are provided so as to be movable toward and away from one gripping portion. A moving-side rotating shaft; drive means for driving the fixed-side rotating shaft to rotate; and a transmission mechanism for transmitting the rotation of the fixed-side rotating shaft to the moving-side rotating shaft. A transmission gear fixed to one of the side rotation shafts and having teeth around it, an intermediate gear having teeth around and meshing with the transmission gear, one of the fixed side rotation shaft and the movement side rotation shaft And intermediate gear rotation A first link member that couples to the intermediate gear, an intermediate transmission wheel that is fixed to the rotary shaft of the intermediate gear, a transmission wheel that is fixed to one of the fixed rotary shaft and the movable rotary shaft, and intermediate transmission A transmission belt that is stretched between the vehicle and the transmission vehicle, and a second link member that connects the rotation shaft of the intermediate gear and any one of the fixed rotation shaft and the movement rotation shaft. It is characterized by.

In the present invention configured as described above, when the fixed rotation shaft is rotated by the driving means, one of the gripping portions fixed to the fixed rotation shaft is rotated. The rotation of the fixed side rotation shaft is transmitted to the movement side rotation shaft by the transmission mechanism, and the other of the gripping portions rotates. In the transmission mechanism, the rotation of either the fixed-side rotary shaft or the movable-side rotary shaft is performed by the transmission gear fixed to either the fixed-side rotary shaft or the movable-side rotary shaft and the intermediate gear meshing with the transmission gear. Is in the opposite direction. The rotation of the intermediate gear is transmitted to one of the fixed rotation shaft and the movable rotation shaft by the intermediate transmission wheel, the transmission wheel, and the transmission belt.
Moreover, when adjusting the distance between a pair of holding | gripping parts, a movement side rotating shaft is moved with respect to a fixed side rotating shaft. At this time, the rotating shaft of the intermediate gear of the transmission mechanism is connected to one of the moving side rotating shaft and the fixed side rotating shaft by the first link member. Accordingly, since the distance between the intermediate gear and the transmission gear is maintained constant, the intermediate gear moves around the transmission gear while maintaining the meshing state with the transmission gear. On the other hand, the rotating shaft of the intermediate gear of the transmission mechanism is connected to one of the moving-side rotating shaft and the fixed-side rotating shaft by the second link member. Therefore, the intermediate transmission wheel fixed to the rotation shaft of the intermediate gear moves in an arc around the other one of the movement side rotation shaft and the fixed side rotation shaft while maintaining a constant distance from the transmission wheel. To do.

Since the transmission mechanism has the transmission gear and the intermediate gear having teeth around the periphery, a part of the transmission mechanism can be a mechanism by meshing of the gears. Therefore, it is not necessary to use a long chain wound around many conventional gears, and the problem of chain slack as in the conventional case is reduced. This facilitates maintenance of the transmission mechanism.
In addition, one of the fixed side rotating shaft and the moving side rotating shaft and the rotating shaft of the intermediate gear are connected by the first link member, and the other of the rotating shaft of the intermediate gear, the fixed side rotating shaft, and the moving side rotating shaft is connected. Are connected by the second link member, so that the distance between one of the fixed side rotating shaft and the moving side rotating shaft and the rotating shaft of the intermediate gear, and the rotating shaft of the intermediate gear and the fixed side rotating shaft, It becomes possible to keep the distance between any one of the movement side rotating shafts constant. Therefore, even when the moving side rotating shaft is moved relative to the fixed side rotating shaft, the engagement between the transmission gear and the intermediate gear and the engagement relationship between the intermediate transmission wheel and the transmission wheel and the transmission belt are maintained. Transmission of rotational motion is ensured.

In this invention, Preferably, the 2nd link member is comprised so that expansion-contraction is possible in a longitudinal direction.
In the present invention configured as described above, since the second link member is configured to be extendable and contractible in the longitudinal direction, by extending and contracting the second link member, between the transmission wheel and the intermediate transmission wheel. The distance can be adjusted. Therefore, it is possible to adjust the tension of the transmission belt with a simple mechanism without changing the engagement state of the transmission belt with respect to the transmission wheel and the intermediate transmission wheel.

In the present invention, preferably, the rotation speed ratio of the fixed side rotation shaft, the rotation shaft of the intermediate gear, and the movement side rotation shaft is 1: 1: 1.
In the present invention configured as described above, the fixed rotation shaft, the rotation shaft of the intermediate gear, and the rotation shaft of the moving side rotate at a rotation ratio of 1: 1: 1, so that the structure of the transmission mechanism can be simplified. Become. Further, since the diameters of the intermediate transmission wheel and the transmission wheel are the same, the transmission belt wound around them is engaged with them over the half circumference of the intermediate transmission wheel and the transmission wheel. Therefore, the transmission belt is engaged with the intermediate transmission wheel and the transmission wheel over a longer region, and the engagement of the transmission belt with the intermediate transmission wheel and the transmission wheel becomes more reliable.

In the present invention, preferably, the driving means is a DC motor, and the cable delivery device further includes a control means for controlling the DC motor, and the control means includes a current detection unit for detecting a load current of the DC motor; The comparison unit that compares the voltage calculated based on the load current detected by the current detection unit with a predetermined target voltage, and the rotation speed of the DC motor is kept constant according to the comparison result of the comparison unit. In this way, the voltage of the DC motor is controlled.
In the present invention configured as described above, the control unit includes a current detection unit and a comparison unit, and the DC motor is configured so as to maintain a constant rotation speed of the DC motor according to the comparison result of the comparison unit. Since it is configured to control the voltage, feedback control of the so-called rotation speed by the voltage is performed. According to the present invention as described above, the rotational speed of the DC motor can be kept constant by a simple control means using the DC motor, and therefore, for example, an induction motor or the like by expensive inverter control becomes unnecessary. Further, by using a DC motor, for example, an AC 100V commercial power source can be used.

It is a top view of the cable delivery apparatus which concerns on one Embodiment of this invention. It is sectional drawing along the II-II line | wire of FIG. 1 of the cable delivery apparatus which concerns on one Embodiment of this invention. It is an enlarged view of the 2nd link member of the cable delivery apparatus which concerns on one Embodiment of this invention. It is a figure which shows the bottom face side of the cable delivery apparatus which concerns on one Embodiment of this invention. It is a block diagram which shows the control means of the cable delivery apparatus which concerns on one Embodiment of this invention. It is a top view which shows a cable delivery apparatus in case the movement side rotating shaft which concerns on one Embodiment of this invention is located in a 1st position. It is a figure which shows the transmission mechanism in the 1st position of the cable delivery apparatus which concerns on one Embodiment of this invention. It is a top view which shows the 2nd position of the movement side rotating shaft which concerns on one Embodiment of this invention. It is a figure which shows the transmission mechanism in the 2nd position of the cable delivery apparatus which concerns on one Embodiment of this invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a plan view of a cable delivery device 1 according to an embodiment of the present invention. Moreover, FIG. 2 is sectional drawing along the II-II line | wire of FIG. 1 of the cable delivery apparatus 1 which concerns on one Embodiment of this invention. As shown in FIGS. 1 and 2, the cable delivery device 1 includes a base portion 2, a fixed-side rotating shaft 4 that is rotatably supported by the base portion 2, and a fixed portion that is fixed to the upper portion of the fixed-side rotating shaft 4. Side roller 6, driving means 8 for rotationally driving the fixed side rotating shaft 4, and a moving side rotating shaft provided so as to be able to approach and separate from the fixed side rotating shaft 4 and rotatably supported by the base portion 2. 10, the moving side roller 12 fixed to the upper part of the moving side rotating shaft 10, the transmission mechanism 14 for transmitting the rotational movement of the fixed side rotating shaft 4 to the moving side rotating shaft 10, and the operation of the driving means 8. And control means 16 (FIG. 5) for controlling.

The base portion 2 is formed in a box shape, and a fixed side roller 6 and a moving side roller 12 are arranged on the upper portion thereof, and inside the lower portion of the fixed side rotating shaft 4 and the moving side rotating shaft 10, driving means. 8, the transmission mechanism 14 and the control means 16 are accommodated.
The fixed-side rotating shaft 4 extends through the upper surface of the base portion 2, and therefore, the lower end is disposed inside the base portion 2 and the upper end protrudes upward from the base portion 2. The fixed-side rotating shaft 4 is rotatably supported by the base portion 2 via a first bearing 18 and a second bearing 20 provided on the upper and lower sides of the upper surface of the base portion 2, respectively. The position is fixed. A first driving sprocket 22 for receiving a driving force from the driving means 8 is fixed below the second bearing 20 on the fixed-side rotating shaft 4.
The fixed side roller 6 is fixed to the upper end of the fixed side rotating shaft 4. The fixed side roller 6 is formed of an elastic member.

  As shown in FIG. 2, the driving unit 8 is a DC motor disposed on the side of the fixed side rotating shaft 4 and the moving side rotating shaft 10, and the output shaft 24 is connected to the fixed side rotating shaft 4 and the moving side rotating shaft 10. It is arranged parallel to the axial direction. A second drive sprocket 26 is fixed to the output shaft 24, and a drive chain 28 is interposed between the second drive sprocket 26 and the first drive sprocket 22 of the fixed-side rotary shaft 4. Is hung around.

  The moving side rotating shaft 10 is arranged in parallel to the fixed side rotating shaft 4 and extends through the upper surface of the base portion 2, so that the lower end is arranged inside the base portion 2 and the upper end protrudes upward from the base portion 2. ing. The lower end of the moving side rotation shaft 10 is rotatably attached to a slide base 30 that can slide with respect to the base portion 2. The slide base 30 extends from the inside of the base portion 2 to above the base portion 2, and the moving side rotary shaft 10 is pivotally supported via a third bearing 32 at the upper end thereof. Further, a fourth bearing 34 is provided at the lower end of the slide table 30, and the lower end of the moving side rotary shaft 10 is pivotally supported via the fourth bearing 34. The slide table 30 is slidably attached to two guide bars 36 </ b> A and 36 </ b> B extending in a direction parallel to a line connecting the rotation center of the fixed side rotation shaft 4 and the rotation center of the movement side rotation shaft 10. Therefore, the moving side rotating shaft 10 is movable in the direction along the guide bars 36 </ b> A and 36 </ b> B, that is, the direction approaching and separating from the fixed side rotating shaft 4 while being supported by the slide base 30.

  The two guide bars 36A and 36B are arranged on opposite sides of the fixed side rotating shaft 4 and the moving side rotating shaft 10, and pass through a through hole (not shown) formed in the slide table 30, and are elongated. It is supported by the base part 2 on both sides in the direction. One guide bar 36A is rotatably supported with respect to the base portion 2, and a screw is formed on the outer periphery thereof. The screw of the guide bar 36A is screwed into the screw formed in the through hole of the slide base 30 corresponding to the guide bar 36A. An operation portion 38 that protrudes outward from the base portion 2 and rotates the guide bar 36A is provided at the end of the guide bar 36A, and a tool such as a ratchet can be engaged with the operation portion 38. Yes.

On the upper surface of the base portion 2, an opening 40 is formed for moving the moving side rotating shaft 10 toward the fixed side rotating shaft 4. In the vicinity of the outer edge of the opening 40 on the fixed rotation shaft 4 side, a stopper 42 for limiting the amount of movement of the moving rotation shaft 10 is provided. The stoppers 42 protrude upward from the upper surface of the base portion 2, and two stoppers 42 are provided in this embodiment.
With such a configuration, the moving-side rotating shaft 10 has the first position (FIG. 6) where the slide base 30 is adjacent to the wall surface of the base portion 2 on the side far from the fixed-side rotating shaft 10, and the slide base 30 is the stopper 42. It is possible to move in the direction of approaching and separating from the fixed side rotation shaft 10 between the second position (FIG. 8) in contact with the fixed rotation shaft 10.

  The moving side roller 12 is fixed to the upper end of the moving side rotating shaft 10. The moving roller 12 is formed of an elastic member, like the fixed roller 6. The moving roller 12 and the fixed roller 4 can be held in a state where they are close to each other with a cable sandwiched therebetween, and thus function as a pair of gripping portions that sandwich the cable.

  The transmission mechanism 14 includes a transmission gear 44 fixed to the moving side rotation shaft 10, an idle gear 46 as an intermediate gear meshing with the transmission gear 44, and an intermediate rotation shaft 48 fixed to an intermediate rotation shaft 48 that is a rotation shaft of the idle gear 46. Hang between the first transmission sprocket 50 as the transmission wheel, the second transmission sprocket 52 as the transmission wheel fixed to the fixed rotation shaft 4, and the first transmission sprocket 50 and the second transmission sprocket 52. And a transmission chain 54 as a rotated transmission belt.

The transmission gear 44 is disposed inside the base portion 2 between the third bearing 32 and the fourth bearing 34 in the moving side rotary shaft 10. Further, the idle gear 46 is arranged at the same height as the transmission gear 44 and is arranged so as to mesh with the transmission gear 44. Both the transmission gear 44 and the idle gear 46 are external gears having the same shape with teeth formed around them. Therefore, the pitch circle diameter, the number of teeth, and the like are the same, and the transmission ratio is 1.
A first link member 56 is connected between the moving side rotation shaft 10 and the intermediate rotation shaft 48. The first link member 56 is disposed on both the upper and lower sides of the transmission gear 44 and the idle gear 46, and one end of the first link member 56 is rotatably attached to the moving side rotation shaft 10, and the other end is rotatable to the intermediate rotation shaft 48. It is attached. By the first link member 56, the distance between the moving side rotating shaft 10 and the intermediate rotating shaft 48 is always kept constant, and the meshing state of the transmission gear 44 and the idle gear 46 is maintained.

The first transmission sprocket 50 is fixed below the idle gear 46 on the intermediate rotation shaft 48. Further, the second transmission sprocket 52 is fixed to the fixed-side rotating shaft 4 at the same height position as the first transmission sprocket 50. Both the first transmission sprocket 50 and the second transmission sprocket 52 have the same shape, the same pitch circle diameter, the same number of teeth, etc., and the transmission ratio through the transmission chain 54 is 1. Therefore, the transmission chain 54 is engaged with each of the first transmission sprocket 50 and the second transmission sprocket 52 over about a half circumference.
Thus, since the transmission ratio between the transmission gear 44 and the idle gear 46 is 1, and the transmission ratio between the first transmission sprocket 50 and the second transmission sprocket 52 is 1, this embodiment , The rotational speed ratio of the moving side rotating shaft 10, the intermediate rotating shaft 48, and the fixed side rotating shaft 4 is 1: 1: 1.

  A second link member 58 is connected between the intermediate rotating shaft 48 and the fixed rotating shaft 4. One end of the second link member 58 is rotatably attached to a position between the idle gear 46 and the first transmission sprocket 50 on the intermediate rotation shaft 48. The other end of the second link member 58 is rotatably attached to a position between the second bearing 20 and the first drive sprocket 22 on the fixed-side rotating shaft 4.

  FIG. 3 is an enlarged view of the second link member 58 of the cable delivery device 1 according to one embodiment of the present invention. The second link member 58 is configured to be stretchable in the longitudinal direction so as to constitute a chain tension adjusting means for adjusting the tension of the transmission chain 54. As shown in FIG. 2 and FIG. 3 described above, the second link member 58 includes a first member 60 attached to the fixed rotation shaft 4, a second member 62 attached to the intermediate rotation shaft 48, The third member 64 is provided between the first member 60 and the second member 62. The third member 64 is arranged so as to be spanned between the first member 60 and the second member 62, and one end of the third member 64 is fixed to the first member 60 with a bolt 66. The other end of the third member 64 is fixed to the second member 62 with a bolt 70 that passes through a long hole 68 formed in the second member 62. Brackets 60 </ b> A and 62 </ b> A projecting downward are provided at the end of the first member 60 far from the fixed rotation shaft 4 and the end of the second member 62 far from the intermediate rotation shaft 48, respectively. Yes. One end of a screw 72 disposed along the longitudinal direction of the second link member 58 is fixed to the bracket 60 </ b> A of the first member 60. The other end of the screw 72 passes through the bracket 62 </ b> A of the second member 62. A nut 74 is screwed into the screw 72 between the bracket 60 </ b> A of the first member 60 and the bracket 62 </ b> A of the second member 62, and its end surface is in contact with the bracket 62 </ b> A of the second member 62.

  FIG. 4 is a view showing the bottom side of the cable delivery device 1 according to one embodiment of the present invention. FIG. 4 is a view of the cable delivery device 1 as seen from the bottom surface side. The base portion 2 has an opening 76 in a region where the second link member 58 is disposed. The opening 76 is covered with a cover (not shown).

  FIG. 5 is a block diagram showing the control means 16 of the cable delivery device 1 according to one embodiment of the present invention. The control unit 16 includes a rectifying unit 78 that converts an AC voltage from the commercial power supply AC100V into a DC voltage, and a DC voltage that is converted by the rectifying unit 78 so that the driving unit 8 rotates at a predetermined speed (rotation speed). Is set to a predetermined target voltage, a speed setting unit 81, a current detection unit 80 for detecting the load current of the driving means 8, a voltage calculated from the load current detected by the current detection unit 80, and a speed setting A comparison unit 82 that compares a predetermined target voltage set by the unit 81 and a voltage adjustment unit 84 that adjusts the voltage of the driving unit 8 according to the comparison result of the comparison unit 82 are provided. The predetermined target voltage set by the speed setting unit 81 is set to a voltage that can achieve the target rotational speed of the driving means 8.

The cable delivery device 1 according to the present embodiment configured as described above operates as follows.
FIG. 6 is a plan view showing the cable delivery device 1 when the moving-side rotary shaft 10 according to the embodiment of the present invention is located at the first position, and FIG. 7 is related to the embodiment of the present invention. It is a figure which shows the transmission mechanism 14 in the 1st position of the cable delivery apparatus 1. FIG. As shown in FIGS. 6 and 7, when the moving-side rotating shaft 10 is located at the first position, the slide table 30 contacts the wall surface of the base portion 2 on the side far from the fixed-side rotating shaft 4. Therefore, the first position is a position where the moving side rotating shaft 10 is farthest from the fixed side rotating shaft 4. In this first position, the moving roller 12 is away from the fixed roller 6 and is not in contact with each other.

  In the state of the first position, as shown in FIG. 7, since the moving side rotating shaft 10 and the intermediate rotating shaft 48 are connected by the first link member 56, the transmission gear 44 and the idle gear 46 are engaged with each other. It has become a state. Further, since the intermediate rotary shaft 48 and the fixed-side rotary shaft 4 are connected by the second link member 58, the distance between the first transmission sprocket 50 and the second transmission sprocket 52 is maintained, and the transmission The chain 54 is in a state of being hung with appropriate tension. At this time, the intermediate rotation shaft 48 is located between the movement-side rotation shaft 10 and the fixed-side rotation shaft 4, and a line connecting the movement-side rotation shaft 10, the fixed-side rotation shaft 4, and the intermediate rotation shaft 48 is A triangle having an obtuse angle formed by the first link member 56 and the second link member 58 is formed.

Next, when a tool such as a ratchet is engaged with the operation unit 38 and the guide bar 36A is rotated, the slide base 30 screwed into the guide bar 36A slides along the guide bars 36A and 36B, and rotates on the moving side. The shaft 10 moves so as to be close to the fixed rotation shaft 4.
FIG. 8 is a plan view showing a second position of the moving-side rotating shaft 10 according to the embodiment of the present invention, and FIG. 9 is a second position of the cable delivery device according to the embodiment of the present invention. It is a figure which shows a transmission mechanism. When the slide table 30 moves in the direction approaching the fixed rotation shaft 4, the end surface of the slide table 30 comes into contact with the stopper 42, and further movement is prevented. The position of the moving side rotating shaft 10 in this state is the second position closest to the fixed side rotating shaft 4.

  In the state where the moving side rotating shaft 10 is in the second position, the intermediate rotating shaft 48 is positioned farther from the fixed side rotating shaft 4 than the moving side rotating shaft 10, as shown in FIG. The side rotary shaft 10 is located between the intermediate rotary shaft 48 and the fixed side rotary shaft 4. The distance between the moving side rotating shaft 10 and the intermediate rotating shaft 48 is regulated by the first link member 56, and the distance between the intermediate rotating shaft 48 and the fixed side rotating shaft 4 is regulated by the second link member 58. Therefore, the line connecting the moving side rotating shaft 10, the intermediate rotating shaft 48, and the fixed side rotating shaft 4 is a triangle in which the angle formed by the first link member 56 and the second link member 58 is an acute angle. Form.

  In the second position, the moving roller 12 and the fixed roller 6 are in contact with each other, and are elastically deformed by their elastic force. When the moving side rotary shaft 10 is in the first position, the cable is moved between the moving side roller 12 and the solid side roller, and then the moving side rotary shaft 10 is moved to the second position side. It is sandwiched and held between the side roller 12 and the fixed side roller 6. The holding force of the cable can be adjusted by the pressing force of the moving side roller 12 to the fixed side roller 6, and the pressing force can be adjusted by the distance of the moving side rotating shaft 10 to the fixed side rotating shaft 4.

When the driving means 8 is driven with the cable sandwiched between the moving roller 12 and the fixed roller 6, the rotation of the output shaft 24 is transmitted to the second driving sprocket 26 via the chain 28 as in the case of U. Thereby, the fixed side rotating shaft 4 rotates. Since the second transmission sprocket 52 fixed to the fixed side rotation shaft 4 also rotates, the rotation is transmitted to the first transmission sprocket 50 via the transmission chain 54 and the intermediate rotation shaft 48 rotates. Since the idle gear 46 fixed to the intermediate rotation shaft 48 meshes with the transmission gear 44, the transmission gear 44 rotates with the rotation of the idle gear 46, and the moving-side rotation shaft 10 rotates. At this time, the rotation direction of the moving-side rotation shaft 10 is opposite to the rotation directions of the intermediate rotation shaft 48 and the fixed-side rotation shaft 4.
Due to the transmission of such a rotational motion, the moving side rotating shaft 10 and the fixed side rotating shaft 4 rotate in opposite directions, and the cable gripped between the moving side roller 12 and the fixed side roller 6 is sent out.

  In the control means 16, the rectifying unit 78 converts the AC voltage of the commercial power supply AC 100V into a DC voltage, and the speed adjusting unit 81 adjusts and sets the DC voltage to the target voltage. While the driving unit 8 is driving the moving side rotating shaft 10 and the fixed side rotating shaft 4, the current detection unit 80 monitors the load current of the driving unit 8, and the comparison unit 82 detects the load detected by the current detection unit 80. The calculated voltage calculated from the current is compared with the target voltage. When the calculated voltage is lower than the target voltage, the voltage adjustment unit 84 increases the voltage supplied to the driving unit 8 by an insufficient voltage. On the other hand, when it is determined in the comparison 82 that the calculated voltage is higher than the target voltage, the voltage adjusting unit 84 decreases the voltage supplied to the driving unit 8 by an excessive voltage. By such control, the control means 16 keeps the voltage supplied to the drive means 8 constant. Therefore, in this embodiment, since a DC motor is used as the driving unit 8, feedback control of the rotational speed is performed to maintain the rotational speed of the output shaft 24 of the driving means 8 constant by maintaining the voltage constant. ing.

  When adjusting the tension of the transmission chain 54 during maintenance, the cover on the bottom side of the base portion 2 is removed to expose the opening 76. As shown in FIG. 4, the opening 76 is formed at a position where the second link member 58 can be seen through the opening 76, and thus the nut 74 of the second link member 58 is rotated through the opening 76. As the nut 74 moves on the screw 72, it is pushed by the end face of the nut 74 and the second member 62 moves away from the first member 60, or the nut 74 moves in a direction approaching the first member 60. The second member 62 moves in a direction approaching the first member 60 due to the tension of the chain 54. By such an operation, the length of the second link member 58 in the longitudinal direction can be adjusted, whereby the tension of the transmission chain 54 can be adjusted.

According to the present embodiment configured as described above, the following excellent effects can be obtained.
The transmission mechanism 14 includes a transmission gear 44, an idle gear 46, a first transmission sprocket 50, a second transmission sprocket 52, and a transmission chain 54, and is disposed between the fixed-side rotary shaft 4 and the intermediate rotary shaft 48. Transmission of the rotational motion is performed by the transmission chain 54, and transmission of the rotational motion between the intermediate rotational shaft 48 and the moving side rotational shaft 10 and reverse rotation of the rotational direction are performed by meshing of the gears. Therefore, it is not necessary to hang a chain around a large number of sprockets as in the prior art, and a reliable rotational motion can be transmitted with a simple structure. With such a structure, the chain can be shortened and the number of sprockets around the chain can be reduced, so that problems caused by slack in the chain and excessive tension can be minimized. Therefore, maintenance of the transmission mechanism 14 is facilitated.

  Since the moving side rotating shaft 10 and the intermediate rotating shaft 48 are connected by the first link member 56 and the fixed side rotating shaft 4 and the intermediate rotating shaft 48 are connected by the second link member 58, the moving side rotation The distance between the shaft 10 and the intermediate rotation shaft 48 and the distance between the intermediate rotation shaft 48 and the fixed-side rotation shaft 4 can be kept constant. Therefore, even when the moving side rotating shaft 10 is moved so as to approach and separate from the fixed side rotating shaft 4, the engagement between the transmission gear 44 and the idle gear 46, and the first and second sprockets of the transmission chain 54. The engagement with 50 and 52 is not released. Accordingly, the distance between the fixed side roller 6 and the movable side roller 12 can be simplified by simply moving the moving side rotating shaft 10 with respect to the fixed side rotating shaft 4 without re-adjusting the setting of the transmission mechanism 14. Can be adjusted.

  Since the rotation speed ratio of the fixed side rotating shaft 4, the intermediate rotating shaft 48, and the moving side rotating shaft 10 is 1: 1: 1, the structure of the transmission mechanism 14 can be simplified. In particular, since the first transmission sprocket 50 and the second transmission sprocket 52 have the same shape, the transmission chain 54 engages over approximately a half circumference of the first transmission sprocket 50 and the second transmission sprocket 52. Therefore, the transmission chain 54 can be reliably engaged with the first transmission sprocket 50 and the second transmission sprocket 52, so that the rotational motion can be reliably transmitted, and problems such as idling can be prevented.

  The second link member 58 slides the third member 64 with respect to the first member 62 so that the second link member 58 can be expanded and contracted in the longitudinal direction. Therefore, the second link member 58 is expanded and contracted. By doing so, the tension of the transmission chain 54 can be adjusted. Here, as a method of adjusting the tension of the chain, for example, there is a method of adjusting the position of the idle sprocket by providing an idle sprocket. The structure is complicated and maintenance is complicated. In the present embodiment, since the second link member 58 can expand and contract in the longitudinal direction, the tension of the transmission chain 54 without changing the engagement state of the transmission chain 54 with respect to the first transmission sprocket 50 and the second transmission sprocket 52. Can be adjusted.

  The control unit 16 detects the load current applied to the driving unit 8 by the current detection unit 80, compares the calculated voltage calculated from the load current with a predetermined target voltage, and adjusts the voltage according to the comparison result. Since the unit 84 adjusts the voltage of the driving means 8, the voltage supplied to the driving means 8 can be kept constant. Therefore, the rotational speeds of the driving means 8, and hence the fixed side rotating shaft 4 and the moving side rotating shaft 10, can be kept constant. In the present embodiment, a DC motor is employed as the driving means 8, but the rotational speed of the DC motor varies when the load changes. In the present embodiment, by using the feedback control of the rotational speed, the rotational speed can be kept constant regardless of the load fluctuations applied to the fixed-side rotating shaft 4 and the moving-side rotating shaft 10.

  Further, since the feedback control of the rotational speed is adopted, for example, it is not necessary to perform inverter control, and the rotational speed of the fixed side rotating shaft 4 and the moving side rotating shaft 10 can be kept constant by using an inexpensive DC motor. it can. Therefore, the control means 16 and the drive means 8 can be realized with an inexpensive structure. Moreover, since a DC motor can be used, for example, a commercial power supply of AC 100V can be used.

  An opening 76 is formed on the bottom surface of the base portion 2, and the length of the second link member 58 can be adjusted via the opening 76. Therefore, a part of the transmission mechanism 14 is removed and adjusted during maintenance. Such complicated work is not necessary. Therefore, maintenance can be performed easily and in a short time.

The present invention is not limited to the embodiment described above, and may be, for example, as follows.
In the above-described embodiment, the transmission of the rotational motion between the stationary rotary shaft 4 and the intermediate rotary shaft 48 is performed by the transmission chain 54, and the rotational motion between the intermediate rotary shaft 48 and the movable rotary shaft 10 is transmitted. The transmission is performed by the transmission gear 44 and the idle gear 46, but the present invention is not limited to this. For example, the transmission of the rotational motion between the fixed-side rotating shaft 4 and the intermediate rotating shaft 48 is performed by meshing of the gears, and the intermediate rotating shaft. Transmission of rotational motion between 48 and the moving-side rotary shaft 10 may be by a sprocket and a chain. In short, it is only necessary that a transmission gear is provided on one of the fixed side rotating shaft and the moving side rotating shaft, and a transmitting wheel is provided on the other side of the fixed side rotating shaft and the moving side rotating shaft.

In the above-described embodiment, the sprocket and the chain are used to transmit the rotational motion from the fixed side rotating shaft 4 to the intermediate rotating shaft 48. However, the present invention is not limited to this, and a pulley and a V belt may be used. What is necessary is just to be comprised with the transmission belt and the transmission belt hung around between them.
The drive means may not be a DC motor, and any type of motor can be used.
The control means is not limited to the one that performs feedback control of the rotational speed, and any control method can be adopted. For example, the rotational speed of the driving means is directly detected, and the control is performed so that the rotational speed is constant. It may be configured to do this, or inverter control may be performed.

  In the above-described embodiment, the rotation speed ratio of the fixed side rotation shaft 4, the intermediate rotation shaft 48, and the movement side rotation shaft 10 is set to be 1: 1: 1. : It can be set to an arbitrary rotation speed ratio such as 2: 1.

DESCRIPTION OF SYMBOLS 1 Cable delivery apparatus 4 Fixed side rotating shaft 6 Fixed side roller 8 Driving means 10 Moving side rotating shaft 12 Moving side roller 14 Transmission mechanism 16 Control means 44 Transmission gear 46 Idle gear 48 Intermediate rotating shaft 50 1st transmission sprocket 52 2nd Transmission sprocket 54 Transmission chain 56 First link member 58 Second link member 80 Current detection unit 82 Comparison unit 84 Voltage adjustment unit

Claims (4)

A pair of gripping portions arranged opposite to each other and sandwiched between them and sent out;
While supporting one of the pair of gripping portions, a fixed-side rotation shaft provided rotatably at a predetermined position;
A moving-side rotary shaft that supports the other of the pair of gripping portions and is rotatably provided, and is movable in the direction of approaching and separating from the one gripping portion;
Drive means for rotationally driving the fixed-side rotary shaft;
A transmission mechanism for transmitting the rotation of the fixed-side rotary shaft to the moving-side rotary shaft,
The transmission mechanism is fixed to one of the fixed-side rotary shaft and the movable-side rotary shaft and has a transmission gear having teeth around it, and an intermediate gear having teeth around and meshing with the transmission gear. A first link member that connects between one of the fixed-side rotating shaft and the moving-side rotating shaft and the rotating shaft of the intermediate gear; and an intermediate transmission wheel fixed to the rotating shaft of the intermediate gear; A transmission wheel fixed to one of the fixed-side rotation shaft and the moving-side rotation shaft, a transmission belt stretched between the intermediate transmission wheel and the transmission wheel, and a rotation shaft of the intermediate gear And a second link member that couples the other of the fixed-side rotating shaft and the moving-side rotating shaft,
A cable feeding device characterized by that. The second link member is configured to be stretchable in the longitudinal direction.
The cable delivery device according to claim 1. A rotation speed ratio of the fixed side rotation shaft, the rotation shaft of the intermediate gear, and the movement side rotation shaft is 1: 1: 1.
The cable delivery device according to claim 1 or 2. The driving means is a DC motor;
The cable delivery device further has control means for controlling the DC motor,
The control means includes a current detection unit that detects a load current of the DC motor, a comparison unit that compares a voltage calculated based on the load current detected by the current detection unit and a predetermined target voltage, According to the comparison result in the comparison unit, the voltage of the DC motor is controlled so that the rotation speed of the DC motor is maintained constant.
The cable delivery device according to any one of claims 1 to 3.

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