JPS6362298B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coiling device for manufacturing a coil for a spring washer by coiling a long wire rod having a rectangular or rectangular cross section, for example.

[Conventional technology]

As a conventional coiling device, for example,
There are those shown in Fig. and Fig. 7. FIG. 6 is a side view thereof, and FIG. 7 is an enlarged view of the main part of FIG. 6.

In the figure, C is a wire winding device, which winds a wire 18 with a square or rectangular cross section on a coiling shaft 15 and sequentially sends out the obtained coil 25, as described later, and R is a coil rotation drive device, which sends out the obtained coil 25. As will be described later, the coil 25 held by the coil 25 is gripped by a chuck part 26 and rotated in synchronization with the coiling shaft. This is a drive device that rotates synchronously. A more detailed explanation of each of the above devices C, R, and M is as follows.

In the drive device M, 1 is a machine frame, 2 is a motor attached to this machine frame 1, 2a is its pulley,
Numerals 3, 4 and 5 are pulleys mounted on a rotating shaft 8 which is also mounted on the machine frame 1 via bearings 6 and 7. V ₁ is a first deceleration belt transmission section, which is constructed by applying a belt 3a to the pulley 2a and pulley 3; V ₂ is a second deceleration belt transmission section, which connects the pulley 4 and a wire winding device C, which will be described later. _V3 is a third deceleration belt transmission section, which rotationally drives the pulley 5 and the chuck section 26 of the coil rotation drive device R, which will be described later. It is constructed by hanging the belt 10 around the pulley 29. Both the second and third reduction belt transmission parts V ₂ and V ₃ are
The rotation of the motor 2 by the first deceleration belt transmission part _V1 is further decelerated at the same deceleration rate, so that the coiling shaft 15 and the chuck part 26 can be rotated synchronously.

In the wire winding device C, 11 is a first housing attached to the machine frame 1, 12 is a rotating shaft attached to the first housing 11 via a bearing 13, 1
Reference numeral 4 denotes a pulley fixed to this rotating shaft 12, which together with the pulley 4 constitutes a second deceleration belt transmission section _V2 . 15 is a coiling shaft coaxially fixed to the rotating shaft 12, and 16 and 17 are guide rollers that guide the side surface of the wire 18 that is spirally wound around the coiling shaft 15. These rollers 16 and 17 have their rotating shafts 21 and 22 mounted on bearings 23 and 24 in a second housing 19 and a third housing 20 that are fixed above and below the first housing 11 so as to sandwich the coiling shaft 15 therebetween. They are attached by attaching them through the respective holes. Therefore, both rollers 16 and 17 are connected to the wire rod 18
It is rotatable in the direction of movement (from the front side toward the drawing in FIG. 8). Note that three guide rollers may be installed around the coiling shaft 15 at intervals of 120 degrees. In addition, since the guide rollers 16 and 17 need to spirally wind the wire rod 18 around the coiling shaft 15, the wire rod 18
The coiling shafts 8 are mounted so as to be shifted in the direction of the coiling shaft 15 by an interval W in accordance with the width of the coiling shaft 8. 33 is guide roller 1
This is a presser roller that presses the wire 18 which is guided by the coiling shafts 6 and 17 and is wound spirally around the coiling shaft 15 from the outside. This roller 33 is attached to a fourth housing 24 fixed to the second housing 19.
It is mounted so as to rotate in the direction of movement of the wire rod 18. 25 is a coil of wire 18 that is wound around the coiling shaft 15 and sent out.

In the coil rotation drive device R, 26 is a chuck portion that grips the coil 25 sent out from the wire wrapping device C. This chuck portion 26 is connected to the bearing 2
A pair of rollers 31 attached to a circular support plate 30 fixed coaxially with the tube shaft 29 supported by the tube shafts 7 and 28,
It consists of 32. Both rollers 31 and 32 are
It is supported in the radial direction of the tube shaft 29 by shafts 31a and 32a which are elastically biased toward the axis thereof, and
The coil 25 can be elastically clamped and rotated in the axial direction of the tube shaft 29. Further, both rollers 31 and 32 are arranged symmetrically about the axis of the tube shaft 29. 34 is tube shaft 2
This is a pulley fixed to 9. The tube shaft 29, and therefore the chuck portion 26 integral therewith, is configured to rotate synchronously with the coiling shaft 15 by the third reduction belt transmission portion _V3 . A hole 29a in the tube shaft 29 is a guide hole through which the coil 25, which is guided by the guide rollers 16 and 17 and is gripped by the chuck portion 26, is sent out of the device.

With this configuration, when a pre-wound coil is made in advance on a part of the wire 18 and the coil is fitted onto the coiling shaft 15 and the motor 2 is started, the coiling shaft 15 rotates synchronously with the chuck portion 26. The wire rod 18 is then wound around this. At this time, the wire rod 18 is guided by the guide rollers 16 and 17 on its lateral side,
The outer surface thereof is pressed by a pressing roller 23 while being rolled up. The coil 25 wound in this way is wound around the guide roller 1.
6 and 17 and pushed into the chuck portion 26, where it is elastically held and rotated in synchronization with the coiling shaft 15. As a result, the coil 25 wound around the coiling shaft 15 is
Since the wire rod 18 is rotated while maintaining a constant state of close contact with the wire rod 5, the winding of the wire rod 18 is always performed reliably.

[Problem that the invention seeks to solve]

However, in such a conventional coiling device, in order to bring the coiled wire 18 into close contact with the coiling shaft 15, the coiling shaft 15 and the chuck portion 26 are rotated synchronously, and the gripping force of the chuck portion 26 is Therefore, since the structure is such that a brake is applied to the coil 25 pushed out by the guide rollers 16 and 17, the guide roller 1
A thrust load is applied to the coiling shafts 6 and 17 in the direction of the coiling shaft 15, and this acts as a rotational moment on the rotation shafts 21 and 22 of the rollers 16 and 17, sometimes damaging their bearings 23 and 24.

In addition, in the conventional coiling device, in order to spirally wind the wire 18, the guide roller 1
6 and 17 are shifted by the distance W to form the first housing 1.
1 has a complicated structure, so there was a problem in that accurate positioning required time and skill. This was especially true when three guide rollers were provided.

Furthermore, the guide rollers 16 and 17 have their bearings 2
3 and 24 are close to the winding part of the wire rod 18 and are arranged around the coiling shaft without being sealed, so not only the rollers 16 and 17 but also the bearings 23 and 24 are free from dust and the like. There was also a management problem in that it was dirty and required constant repair.

Such a problem also occurs when a scroll chuck or a drill chuck is used for the chuck portion 26. This is because these chucks also have the same function as the chuck portion 26 described above. Although not shown, there is a coiling shaft 15 that uses a tapered coiling shaft (having a larger diameter on the coil rotation driving device side), but this case also has the above-mentioned problems. In other words, when the wire rod 18 is wound around the tapered coiling shaft, contact resistance is generated between the coiling shaft and the coiling shaft. There is no need to increase the size of the coiling shaft, and it can be rolled up simply by driving the coiling shaft. However, when the length of the coil exceeds a certain level, the contact resistance of the tapered portion decreases due to the load, so it is necessary to use the chuck section 26, scroll chuck, or drill chuck as an auxiliary drive for rotation. It will stop happening. However, if this auxiliary driving rotation was performed, the brake would be applied to the coil that was about to slip in the axial direction, resulting in problems such as damage to the bearing as described above.

The present invention aims to solve these conventional problems, and provides a coiling device in which the structure of the wire guide mechanism is simple, there is no risk of damage, and repair management is easy.

[Means for solving problems]

That is, the coiling device of the present invention rotates relative to a coiling shaft rotated by a drive device and an inclined axis that is fitted onto the coiling shaft and intersects the axis at a slight angle of inclination. Also, a wire guide tube whose side end face perpendicular to the inclined axis serves as a guide surface for the wire to be wound around the coiling shaft, and a wire rod wound spirally around the coiling shaft along the guide surface of the wire guide tube. A wire winding device equipped with a presser roller that presses from the outside, and a chuck portion that grips a coil of wire that is wound around the coiling shaft and is sent out, and rotates it in synchronization with the coiling shaft by the drive device. This device is composed of a coil rotation drive device and the drive device for synchronously rotating the coiling shaft and the chuck portion.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 6. Figure 1 shows a wire winding device, which corresponds to that shown in Figure 7, Figure 2 shows an enlarged view of the main parts of Figure 2, and Figure 3 shows a coil rotation drive device, which corresponds to that shown in Figure 7.
Corresponding to that in Figure 4 and Figure 5 are the 3rd
It is an explanatory diagram of the main part of the figure. The drive device in this invention is the same as the conventional one, so the explanation will be omitted.

In the figure, the same reference numerals as in FIGS. 7 and 8 indicate the same or corresponding parts. C ₁ is a wire winding device,
R ₁ is a coil rotation drive device.

In the wire winding device C ₁ , 41 is a wire guide tube, which is fitted onto the coiling shaft 15 and is rotatably attached to a housing 42 integrated with the first housing 19 via a bearing 43 for thrust load. . This guide cylinder 41 has an inclined axis S ₂ that intersects the axis S ₁ of the coiling shaft 15 at a slight inclination angle θ, in this embodiment, an inclination angle θ of 5 degrees.
, it is mounted so as to rotate relative to the coiling shaft 15. In addition, the wire guide tube 41
The side end face f perpendicular to the above-mentioned inclined axis _S2 , which is the axis of
is designed to function as a guide surface for the wire rod 18 wound around the coiling shaft 15, and in this embodiment, the angle is the same as the above-mentioned inclination angle θ, that is, by 5 degrees with respect to the axis S ₁ of the coiling shaft 15. It is sloping. The holding roller 33 for the wire rod 18 is attached to a shaft 45 protruding from the side plate portion 44 of the housing 42 via a bearing 46 .

In the coil rotation drive device _R1 , 46 is a scroll chuck attached to the tube shaft 29, and has an annular plate 47 and three chuck claws attached to the annular plate 47 radially around the axis of the tube shaft 29. 48
It is structured as follows. The chuck pawl 48 includes a pawl guide 48a and a guide pin 4 attached to the pawl guide 48a.
8b and toward the axis of the tube shaft 29.
Claw 48d attached so that it can be retracted by being biased by a spring
It is composed of. The tip of the claw 48d is processed to be carbide.

Next, the effect will be explained.

A pre-wound coil is made in advance on a part of the wire 18, and when the coil is fitted onto the coiling shaft 15 and the motor 2 is started, the coiling shaft 15 rotates synchronously with the chuck portion 46, as in the conventional case, and the wire 18 is rotated in synchronism with the chuck portion 46. It is wrapped around. At this time,
The wire rod 18 is wound while its lateral side surface is guided by the guide surface f of the wire rod guide tube 41 and its outer surface is pressed by the press roller 33.

The coil 25 wound and formed in this way is pressed by the wire guide tube 41 and pushed into the chuck part 46, where it is elastically gripped from three sides by the three chuck claws 48 and attached to the coiling shaft 15. It is driven and rotated synchronously.

As a result, the close contact between the coil 25 and the coiling shaft 15 is maintained, and a constant frictional resistance is always generated between the coil 25 and the coiling shaft 15, so that the winding of the wire 18 is always performed reliably. In addition, the wire guide tube 41 tries to push out the coil 25 against the gripping force of the chuck part 46 that tries to drive and rotate the coil 25, so it receives a large load, that is, a thrust load, in the direction of the coiling axis 15. It turns out. However, the bearing 43 of the wire rod guide tube 41 receives a load substantially in the thrust direction, and moreover, the bearing 43 has a structure that can absorb loads from the thrust direction rather than from the radial direction. Therefore, it can sufficiently withstand the above thrust load. Therefore, the bearings 2 of the conventional guide rollers 16, 17
3 and 24 were sometimes damaged due to receiving loads in the radial direction, but according to the wire guide tube 41, such problems can be solved.

Furthermore, the guide surface f of the wire guide tube 41 is accurately determined by setting the inclination angle θ of the rotation axis S ₂ of the wire rod guide tube 41 with respect to the rotation S ₁ of the coiling shaft 15, so that the structure is simplified. Therefore, in order to guide the wire 18 in a spiral as in the past,
The work of adjusting the interval W between the guide rollers 16 and 17 becomes unnecessary.

Furthermore, the bearing 43 of the wire rod guide tube 41 is located at a position away from the wound portion of the wire rod 18, and the guide surface f of the wire rod 18 is a simple plane.
Since the assembly structure is such that there is almost no gap between the coiling shaft 15 and the coiling shaft 15, there is no possibility that these bearings 43 or the guide surface f will become contaminated with dust and cause functional deterioration, making it easier to repair the device. Easier to manage.

〔Effect of the invention〕

As explained above, according to the present invention, a wire guide tube is fitted onto the coiling shaft and rotates relatively at an inclined axis that intersects the rotation axis at a slight angle of inclination, and the wire is guided by the guide surface of the wire guide tube. Since the guide mechanism for the wire rod is provided, it is possible to obtain a coiling device that has a simple structure, is free from damage, and is easy to repair and manage.

[Brief explanation of drawings]

1 to 5 show an embodiment of the present invention, FIG. 1 is a sectional view of a wire winding device that is a component thereof, FIG. 2 is an enlarged view of the main part of FIG. 1, and FIG. 4 is an enlarged view taken from the direction of arrow A in FIG. 3, FIG. 5 is a cross-sectional view of FIG. 4, and FIG. 6 is a diagram of a conventional coiling device. The side view and FIG. 7 are enlarged views of the main parts. C ₁ ... Wire winding device, R ₁ ... Coil rotation drive device, M ... Drive device, 15 ... Coiling shaft,
S ₁ ...Rotation axis of the coiling shaft 15, θ...Inclination angle, S ₂ ...Inclination axis (rotation axis of the wire guide tube 41),
f...Guide surface, 18...Wire rod, 25...Coil, 33...Press roller, 41...Wire guide tube, 46...Chuck portion.

Claims (1)

[Claims] 1 A coiling shaft rotated by a drive device and a coiling shaft that is fitted into this coiling shaft and rotates relative to the tilted shaft that intersects the shaft at a slight tilt angle, and rotates perpendicularly to the tilted shaft. A wire guide tube whose side end surface serves as a guide surface for the wire to be wound around the coiling shaft, and a presser roller that presses the wire spirally wound around the coiling shaft from the outside along the guide surface of the wire guide tube. a coil rotation drive device comprising: a wire rod winding device; a chuck portion that grips a coil of wire wound around the coiling shaft and fed out; and a chuck portion that causes the drive device to rotate the coil in synchronization with the coiling shaft; A coiling device comprising the drive device for synchronously rotating the chuck portion and the chuck portion.