JP5505883B2 - Wire winding and feeding device - Google Patents

Description

  The present invention relates to a wire winding / feeding device.

A wire winding / feeding device is used in a wide range of applications such as raising and lowering a workpiece and driving a slide in a production line (for example, Patent Documents 1 and 2). The configuration of the wire winding / feeding device according to the prior art will be described with reference to FIG.
As shown in FIG. 6, the wire winding / unwinding device according to the related art is configured based on frames 910, 911, 912, and 913, and a motor 920 is attached to the frame 913. A spline shaft 951 is joined to the rotating shaft of the motor 920, and a pulley 991 is attached to the middle portion. The spline shaft 951 is supported by the frame 911 and the frame 912 in a rotatable state.

A pulley 992 is disposed below the pulley 991, and a belt 990 is stretched between the pulley 991 and the pulley 992. The pulley 992 is attached to the shaft end of the feed screw 950, and the feed screw 950 is supported by the frame 911 and the frame 912 in a rotatable state.
A drum 940 that rotates in conjunction with the rotation is attached to the spline shaft 951, and is slidable in the X-axis direction left and right by sleeves 945 and 946, and transmits rotational driving force to the drum 940. Brackets 941 and 942 that are not rotated by the rotation of the spline shaft 951 are attached to the left and right of the drum 940 in the X-axis direction. The bracket 941 and the bracket 942 are connected by a bridge member 943 at a lower portion in the Z-axis direction. A screw receiving member 944 is fixed to the bridge member 943 and a screw hole corresponding to the feed screw 950 is formed. Thus, the drum 940 slides left and right in the X-axis direction according to the amount of rotation of the feed screw 950.

  In the wire winding / feeding device according to the related art, the drum 940 rotates according to the rotation amount of the motor 920, and slides in the X-axis direction according to the rotation amount. For this reason, the wire 960 wound around the outer peripheral surface of the drum 940 can be wound and fed out in an aligned state without overlapping.

JP 2007-127138 A JP 2009-204134 A

However, in the wire winding / unwinding device according to the above-described prior art, since the spline shaft 951 is used to transmit the rotational driving force to the drum 940, there is a problem that rattling occurs when the drum 940 rotates. . That is, in order to make the drum 940 slidable with respect to the spline shaft 951, a certain gap must be secured between the spline shaft 951 and the sleeves 945 and 946, which causes backlash. Specifically, as shown in FIG. 7, since the hole 940b through which the spline shaft 951 is inserted is opened at the center of the cross section of the drum 940, if there is a backlash between the spline shaft 951 and the drum 940, the drum in the outer peripheral surface 940a of the 940, rattle according to the drum diameter _{D 2} will be amplified.

If there is a large backlash when the drum 940 rotates, the winding and feeding of the wire cannot be performed smoothly. In addition, when the rotational drive of the motor 920 is stopped, the drum 940 may be slightly moved, and the wire 960 is wound or fed out along with this. Such a phenomenon becomes a problem from the viewpoint of the accuracy of the apparatus.
Although it is conceivable that the backlash of the spline shaft 951 and the sleeves 945 and 946 is reduced with high accuracy, it is possible to reduce the backlash. Has the problem of increasing costs.

  The present invention has been made to solve the above-described problems, and is capable of winding and feeding a wire with high accuracy while suppressing an increase in cost. The purpose is to provide.

Therefore, the present invention has the following features.
A wire rod winding / feeding device according to the present invention has a base frame, a drive source fixed to the base frame and generating a rotational driving force, a cylindrical or cylindrical appearance, and a wire rod on the outer peripheral surface. A drum having a winding area, a slide shaft that is inserted radially outward from the center of the cross section of the drum in the longitudinal direction, and slidably supports the drum in the longitudinal direction, and the drum in conjunction with its rotation. And a slide drive unit that slides in the longitudinal direction. In the wire winding and feeding device according to the present invention, the slide shaft receives the rotational driving force of the drive source and revolves with the offset amount between the shaft center and the cross-sectional center of the drum as the radius. It is characterized by rotating by the revolution of the shaft.

  In the wire winding and feeding device according to the present invention, the slide shaft is inserted in the longitudinal direction on the outer side in the radial direction from the center of the cross section of the drum, and the drum receives the transmission of the rotational driving force from the inserted slide shaft. Compared with the wire winding / feeding device according to the above prior art that receives the rotational driving force from the spline shaft that passes through the drum cross-sectional center in the longitudinal direction, the backlash is reduced and the accuracy is high. The winding and feeding of the wire can be performed. That is, in the device according to the present invention, even if the accuracy between the slide shaft and the drum is the same as the accuracy of the spline shaft and the sleeve of the device according to the above prior art, from the place where the slide shaft is inserted. Since the distance in the cross-sectional direction to the outer peripheral surface of the drum, which is the winding area of the wire rod, is smaller than that of the device according to the above prior art, the backlash is small correspondingly and high accuracy can be obtained.

Further, in the wire winding / unwinding device according to the present invention, high accuracy can be obtained by adopting a configuration in which the slide shaft is inserted in the radially outer side from the center of the cross section instead of the center of the cross section of the drum as described above. Therefore, high accuracy can be obtained without necessarily manufacturing each part with high processing accuracy.
Therefore, the wire winding / unwinding apparatus according to the present invention can perform winding / unwinding of the wire with high accuracy while suppressing an increase in cost.

As an example, the wire winding / unwinding apparatus according to the present invention can employ the following variations.
In the wire winding / unwinding device according to the present invention, in the above configuration, the slide drive unit has a feed screw fixed to the base frame, and has a length in the axial direction (longitudinal direction) at the center of the cross section of the drum. It is possible to employ a configuration in which a screw hole that is screwed with the feed screw is provided, and the drum slides according to the screwing amount of the feed screw by the rotation thereof. By adopting such a configuration, the drum can be slid in the axial direction (longitudinal direction) according to the amount of rotation by the feed screw screwed into the screw hole at the center of the cross section. For this reason, the line winding of the wire to the outer peripheral surface of the drum can be realized by the screw pitch of the feed screw.

In the wire winding / unwinding device according to the present invention, in the above configuration, the screw pitch of the feed screw is set to be equal to the width W of the wire wound in the state of being wound around the outer peripheral surface of the drum. And By adopting such a configuration, aligned winding of the wire can be realized with certainty.
In the wire winding / feeding device according to the present invention, in the above-described configuration, the slide driving unit circumscribes a region other than the winding region of the wire on the outer peripheral surface of the drum, and is a roller that is rotatable with respect to the outer peripheral surface. And the center axis of the roller in the slide drive unit is arranged at an angle greater than 0 [°] and less than 90 [°] with respect to the center axis of the drum. It is possible to adopt a configuration in which sliding is performed according to the angle formed by the central axes with the roller of the slide drive unit.

In the case of adopting such a configuration, it is possible to deal with wire rods having various diameters compared to the case of employing the feed screw, and it can be applied to various wire rods. Therefore, it is possible to reduce the manufacturing cost by making the apparatus versatile.
In the wire winding / unwinding device according to the present invention, in the above configuration, when the width of the wire wound in the outer peripheral surface of the drum is W and the outer diameter of the drum is D, the slide driving unit The angle θ formed by the central axis of the roller and the central axis of the drum is set so as to satisfy the following relationship.

[Equation 1] W ≦ πD × tan θ
Thereby, even with respect to a wire whose cross-sectional shape is deformed by a tension at the time of winding, the apparatus according to the present invention can surely wind the aligned wire.
In the wire winding / feeding device according to the present invention, in the above configuration, the drum is inserted in the longitudinal direction concentrically with the slide shaft with respect to the center of the cross section of the drum, and the drum is slidably supported in the longitudinal direction. It is also possible to adopt a configuration in which a second slide shaft is provided, and the center of the slide shaft and the second slide shaft is arranged with a point-symmetric relationship with respect to the cross-sectional center of the drum. . When the second slide shaft is also provided as described above, even when a large force is applied to the drum when winding the wire around the drum, the wire can be wound and fed with high accuracy.

  Of course, three or more slide shafts may be provided.

It is a model perspective view which shows the external appearance of the coiling | winding and drawing | feeding-out apparatus 1 which concerns on Embodiment 1 of this invention. It is a schematic cross section which shows the principal part structure of the winding / unwinding apparatus 1 of a wire. 2 is a schematic front view showing a configuration of a drum 40. FIG. It is a model perspective view which shows the external appearance of the winding / feeding-out apparatus 2 of the wire material which concerns on Embodiment 2 of this invention. It is a model front view which shows the principal part structure of the winding / unwinding apparatus 2 of a wire. It is sectional drawing which shows schematic structure of the winding and unwinding apparatus of the wire which concerns on a prior art. It is a model front view which shows the structure of the drum 940 which concerns on a prior art.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Note that the embodiments according to the following description are used as examples for easily explaining the structural features of the present invention and the effects obtained from the characteristic configurations. Therefore, the present invention is not limited to the following modes except for essential features.
[Embodiment 1]
1. Overall Configuration The overall configuration of the wire winding and feeding device 1 according to the present embodiment will be described with reference to FIG.

As shown in FIG. 1, the wire winding / feeding device 1 is formed on the basis of frames 10, 11, and 12. The frames 11 and 12 are joined in a state of being regulated upward in the Z-axis direction from both end portions of the frame 10 in the X-axis direction. A motor 21 is attached to the frame 12 via a gear box 20 on the right side in the X-axis direction.
Each of the frame 11 and the frame 12 is provided with rotating plates 30 and 31 along main surfaces on opposite sides. The rotary plates 30 and 31 are joined to each other by slide shafts 32 and 33. A cylindrical drum 40 is disposed between the rotary plate 30 and the rotary plate 31, and slide shafts 32 and 33 are inserted therethrough. The drum 40 is slidable along the longitudinal direction (X-axis direction) of the slide shafts 32 and 33.

The drum 40 has a region where a wire 60 as a wire can be wound around a part of the outer peripheral surface thereof. Further, a feed screw 50 is inserted into the drum 40 so as to be screwed into an internal thread portion formed at the center of the cross section with respect to the end face on the left side in the X-axis direction. The other end of the feed screw 50 is fixed to the frame 11 so that it does not interfere with the rotating plate 30.
The frame 10 is perforated at two locations (only one location is shown in FIG. 1), and the wire 60 can enter and exit in the Z-axis direction from each location. A positioning roller 70 that guides the wire 60 to the edge portion of the hole is provided on the upper surface in the Z-axis direction of the frame 10 in a rotatable state.

  As shown in FIG. 1, in the wire winding / unwinding apparatus 1 according to the present embodiment, the rotating plates 30 and 31 rotate as the motor 21 rotates forward and backward. Then, due to the rotation of the rotating plates 30 and 31, the rotational driving force from the motor 21 is transmitted to the drum 40 via the slide shafts 32 and 33, and the drum 40 also rotates. At this time, the drum 40 is slidably driven to the right or left in the X-axis direction according to the rotation amount of the drum 40 and the screw pitch of the feed screw 50 (arrow A).

As described above, winding and unwinding of the wire 60 are executed.
2. Main Part Configuration A main part configuration of the wire winding and feeding device 1 according to the present embodiment will be described with reference to FIG. FIG. 2 is a cross-sectional view showing the configuration of the drum 40 and its peripheral portion.
As shown in FIG. 2, the drum 40 disposed between the frames 11 and 12 is provided with three holes that are inserted in the X-axis direction. One of the holes 40b is provided at the center of the cross section of the drum 40. A female screw portion 40c is formed on the left side in the X-axis direction, and a feed screw 50 fixed to the frame 11 is screwed. . The remaining two holes are provided outside the diameter of the cross section than the hole 40b, and are provided concentrically with respect to the center of the cross section. Linear motion bearings 81, 82, 83, and 84 are attached to the respective holes, and slide shafts 32 and 33 to be inserted are slidable. Here, the screw pitch of the feed screw 50 and the female screw portion 40c screwed with the feed screw 50 is defined according to the wire diameter of the wire 60 that performs winding and feeding.

The rotary plates 30 and 31 are attached to the frames 11 and 12 via bearings 80 and 85, respectively. The rotary plate 31 is joined to a rotary shaft 20a connected to the motor 21.
The wire 60 is wound around a part of the outer peripheral surface 40a of the drum 40.
3. Arrangement of Holes 40d and 40e in Drum 40 The arrangement of holes 40d and 40e in drum 40 will be described with reference to FIG. 3 is a schematic front view of the drum 40 as viewed from the left side in the X-axis direction in FIG.

As shown in FIG. 3, in the drum 40, the hole 40 b in which the female screw portion 40 c that is screwed with the feed screw 50 is formed at the center of the cross section of the drum 40.
On the other hand, the holes 40d and 40e through which the slide shafts 32 and 33 are inserted are opened by D _1/2 from the cross-sectional center of the drum 40 and are concentric with each other.
In the winding-unwinding device of the wire according to the related art shown in FIG. 6 transmits the rotational driving force to the drum in the cross-sectional center of the drum, the rattling, the diameter D ₀ of the drum between the spline shaft and the drum It appears in a proportionally amplified form, leading to a decrease in accuracy in winding the wire.

On the other hand, in the wire winding and feeding device 1 according to the present embodiment, the holes 40d and 40e through which the slide shafts 32 and 33 for transmitting the rotational driving force to the drum 40 are inserted are D _1/2 outward from the center of the cross section. Even if the backlash between the slide shafts 32 and 33 and the linear motion bearings 81 to 84 is the same as described above, the backlash appearing on the outer peripheral surface 40a of the drum 40 is Compared to the wire winding / unwinding device, it is very small.

As described above, in the wire winding / feeding device 1 according to the present embodiment, the wire winding / delivery device with higher accuracy than the device according to the prior art can be used without particularly using a high-precision and expensive bearing. A payout can be performed.
[Embodiment 2]
1. Overall Configuration The overall configuration of the wire winding / unwinding apparatus 2 according to Embodiment 2 will be described with reference to FIG. In FIG. 4, portions having the same configuration as that of the wire winding and feeding device 1 according to the first embodiment are denoted by the same reference numerals, and description thereof will be omitted below.

As shown in FIG. 4, a feed screw is not attached to the frame 11, and a female screw portion corresponding to the drum 40 is not formed. In the wire winding and feeding device 2 according to the present embodiment, an L-shaped subframe 93 is joined to the frame 12, and the tip portion covers a part above the drum 40. . An angle adjustment block 92 is attached to the distal end portion of the subframe 93 so as to be rotatable about the axis Ax ₁ (rot. 1).

  For the angle adjustment block 92, the range of rotation is limited by guide plates 94 and 95 formed on both edges in the width direction of the subframe 93. An angle adjusting screw 96 is attached to the guide plates 94 and 95 so that the rotation of the angle adjusting block 92 can be restricted (the angle adjusting screw attached to the guide plate 94 is shown in the figure. Omitted).

  A roller guide 91 that rotates integrally with the angle adjustment block 92 is joined to the angle adjustment block 92, and a feed roller 90 is pivotally supported on the roller guide 91. The shaft portion 91a of the roller guide 91 protrudes above the angle adjustment block 92 and is fixed so as to rotate as a unit. The feed roller 90 is in contact with the outer peripheral surface of the drum 40 and is driven as the drum 40 rotates. The rotation axis of the roller 90 is not parallel to the rotation axis of the drum 40 but is set with an angle according to the width W of the wire 60 to be wound.

The contact pressure of the roller 90 can be set to 2 [kgf] to 7 [kgf], for example. More specifically, when adopting a configuration in which the pressing force of the roller 90 against the outer peripheral surface 40a of the drum 40 can be adjusted with a screw, for example, the screw is rotated 1.5 to 2 times from a state where the contact pressure is 0 [kgf]. (About 1.5 [mm]) It is sufficient to tighten.
Since the wire 60 is wound around the drum 40 under tension, the wire 60 is deformed into a flat shape having a width wider than the height on the outer peripheral surface of the drum 40. In the wire winding and feeding device 2 according to the present embodiment, the angle of the rotation axis of the roller 90 is set in consideration of such deformation of the cross-sectional shape of the wire 60. This will be described next.

2. Setting of Angle of Roller 90 The setting of the angle of the rotating shaft of the roller 90 in the wire winding / feeding device 2 will be described with reference to FIG.
As shown in FIG. 5, the roller 90 is disposed so as to contact the outer peripheral surface 40 a of the drum 40. The area where the roller 90 is in contact is an area excluding the winding area of the wire 60.

As shown in the portion surrounded by the two-dot chain line in FIG. 5, the rotation axis Ax ₃ of the roller 90 is arranged at an angle θ ₁ with respect to the rotation axis Ax ₂ of the drum 40. As described above, when the cross-sectional width of the wire 60 wound around the drum 40 is W and the outer diameter of the drum 40 is D, the rollers 90 are arranged to satisfy the following relationship.
[Equation 2] W ≦ πD × tan θ ₁
3. Superiority The wire winding and feeding device 2 according to the present embodiment has the following advantages in addition to the advantages of the wire winding and feeding device 1 according to the first embodiment.

The wire winding and feeding device 2 according to the present embodiment includes a roller 90 that circumscribes the outer peripheral surface 40 a of the drum 40. The roller 90 has a rotation axis Ax ₃ that can be adjusted with respect to the rotation axis Ax _{2 of the} drum 40. Therefore, when the drum 40 is rotationally driven in response to the rotational driving force from the motor 21, the drum 40 is driven by the force component in the rotational axis direction (Y-axis direction) of the drum 40 generated by contact with the roller 90. 40 slides in the direction of the rotation axis (arrow B in FIG. 4).

Angle at which the rotary shaft Ax ₃ forms of roller 90 with respect to the rotation axis Ax ₂ of the drum 40 is set so as to satisfy the above equation (2), in the state, the angle adjusting blocks 92, by the angle adjusting screw 96 Rotation is regulated. Thus, when the drum 40 rotates once, it slides in the X-axis direction by the width W of the wire 60 (arrow B in FIG. 4). Can be maintained.

As described above, in the wire winding and feeding device 2 according to the present embodiment, the angle θ ₁ of the rotation axis Ax ₃ of the roller 90 with respect to the rotation axis Ax ₂ of the drum 40 is set for each line width W of the wire 60. It is possible to cope with wire rods such as wires having various line widths.
Further, in the wire winding / feeding device 2, the roller 90 is merely driven with respect to the rotation of the drum 40, and does not require a separate drive source for driving the roller 90. Excellent in terms of cost.

Therefore, in the wire winding / feeding device 2 according to the present embodiment, in addition to the superiority of the wire winding / feeding device 1 according to the first embodiment, the wire winding / feeding device 1 has various line widths. In addition to being able to cope with this, it is possible to take up and pay out in an aligned state while reducing damage to the wire without increasing the cost.
[Other matters]
In the first and second embodiments, the wire 60 is adopted as an example of the wire that is the target of winding and feeding, but the type of the wire is not limited to this. It can also be applied to ropes and strings, and the wire can also be applied to single wires and stranded wires.

In the first and second embodiments, the driving form in which one end side of the wire is wound and the other end side is extended is adopted. However, one end of the wire is fixed to the drum like a winch, for example. In addition, the other end may be wound and fed.
In the first and second embodiments, the drum 40 is made of a metal material. However, the material used is not limited to this. For example, the outer peripheral surface of the roller can be made of rubber or resin, and both the drum and the roller can be made of a resin material.

In the case of adopting the configuration of the second embodiment, when rubber or the like is used as a material for the roller, it may be necessary to consider the slip angle between the drum and the roller.
In the first and second embodiments, the configuration in which the two slide shafts 32 and 33 are inserted into the drum 40 is used as an example. However, the number of slide shafts through which the drum is inserted is limited to this. Is not to be done. For example, one may be sufficient and conversely three or more may be sufficient.

  INDUSTRIAL APPLICABILITY The present invention is useful for realizing a wire winding / unwinding device capable of winding and unwinding a wire with high accuracy while suppressing an increase in manufacturing cost.

1,2. Wire winding / unwinding device 10, 11, 12. Frame 20. Gearbox 21. Motor 30,31. Rotating plate 32,33. Slide shaft 40. Drum 50. Lead screw 60. Wire 70. Positioning roller 80, 85. Bearing 81-84. Linear motion bearing 90. Feed roller 91. Roller guide 92. Angle adjustment block 93. Subframe 94, 95. Guide plate 96. Angle adjustment screw

Claims (6)

A base frame,
A driving source fixed to the base frame and generating a rotational driving force;
A drum having a columnar or cylindrical appearance, and having a wire winding region on the outer peripheral surface;
A slide shaft for inserting the outer side in the radial direction from the center of the cross section in the axial direction with respect to the drum, and supporting the drum slidably in the axial direction;
A slide drive unit that slides the drum in the longitudinal direction in conjunction with its rotation;
Have
The slide shaft receives the rotational driving force of the drive source, revolves with an offset amount between the shaft center and the cross-sectional center of the drum as a radius,
The said drum rotates by the revolution of the said slide shaft. The winding-up and drawing-out apparatus of the wire rod characterized by the above-mentioned. The slide drive unit has a feed screw fixed to the base frame,
At the center of the cross section of the drum, there is a screw hole having a length in the axial direction and screwed with the feed screw,
The said drum slides according to the screwing amount of the said feed screw by the rotation. The winding-up / feed-out apparatus of the wire rod of Claim 1 characterized by the above-mentioned. The wire pitch of the wire rod according to claim 2, wherein the thread pitch of the feed screw is set to the same value as the width W of the wire rod when wound around the outer peripheral surface of the drum. apparatus. The slide drive unit circumscribes a region other than the winding region of the wire rod on the outer peripheral surface of the drum, and includes a roller that is rotatable with respect to the outer peripheral surface.
The roller of the slide drive unit is arranged with an angle greater than 0 ° and less than 90 ° with respect to the central axis of the drum.
2. The wire winding and feeding device according to claim 1, wherein the drum slides according to an angle formed by central axes between the drum and a roller of the slide driving unit. W is the width of the wire in the state wound on the outer peripheral surface of the drum,
When the outer peripheral diameter of the drum is D,
The angle θ formed by the central axis of the roller in the slide drive unit and the central axis of the drum is:
W ≦ πD × tan θ
The wire winding / feeding device according to claim 4, wherein the relationship is satisfied. A second slide shaft is inserted into the drum in the longitudinal direction concentrically with the slide shaft with respect to the center of the cross section, and the drum is slidably supported in the longitudinal direction,
6. The slide shaft and the second slide shaft are arranged with a point-symmetrical relationship with respect to the center of the cross section of the drum. A device for winding and feeding wire according to crab.

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