JPH0148099B2 - - 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 Figure and Figure 4. Fig. 3 is a side view thereof, and Fig. 4 is an enlarged view of the main part of Fig. 3.

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 gripped by a chuck 26 is rotated in synchronization with the coiling shaft. It 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. Tube shaft 29
The belt 10 is looped around a pulley 29a fixed to the pulley 29a. The first, second, and third deceleration belt transmission sections V ₁ , V ₂ , and V ₃ are configured to rotate the coiling shaft 15 and the chuck section 26 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 are mounted on 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.
The rotary shafts 21 and 22 are attached via bearings 23 and 24, respectively. Therefore, both rollers 16 and 17 are connected to the wire rod 1
8 (in FIG. 4, from the front side toward the drawing). Note that this type of guide roller has a diameter of 120 mm around the coiling shaft 15.
In some cases, three pieces are installed at intervals. In addition, since the guide rollers 16 and 17 need to spirally wind the wire 18 around the coiling shaft 15,
The coiling shaft 1 is rotated by the interval w according to the width of the wire 18.
They are installed offset in 5 directions. 34 is a coiling shaft 15 guided by guide rollers 16 and 17.
This is a presser roller that presses the wire 18 spirally wound from the outside. This roller 34
is attached to the fourth housing 24 fixed to the second housing 19 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 coaxially fixed to a tube shaft 29 supported by
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. The tube shaft 29, and therefore the chuck portion 26 integral therewith,
Coiling shaft 15 by reduction belt transmission part V ₃
It is designed to rotate in sync with the The hole 29b 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.

Since this configuration is familiar, 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 in synchronization with the chuck portion 26. The wire 18 is wound around the coiling shaft 15. 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 34 while being rolled up. The coil 25 wound in this way is wound around the guide roller 1.
6 and 17 into the chuck portion 26, and is elastically gripped by the rollers 31 and 32, and the tube shaft 29
is sent into the guide hole 29b. in this way,
Coil 25 wound around coiling shaft 15
is rotated by the rotary drive device R while maintaining a constant state of close contact with the coiling shaft 15, and is sent out of the device.

[Problem that the invention seeks to solve]

However, such a conventional coiling device has a structure in which a brake is applied to the coil 25 pushed out by the guide rollers 16 and 17 by the gripping force of the chuck portion 26. As a result, a thrust load is applied to the guide rollers 16, 17 in the direction of the coiling shaft 15, which acts as a rotational moment on the rotation shafts 21, 22 of the rollers 16, 17, sometimes damaging their bearings 23, 24.

Such a problem also occurs when a stroke 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 also a coiling shaft 15 that uses a tapered coiling shaft (having a larger diameter on the coil rotation driving device side), but this also has the above-mentioned problems. In other words, when the wire 18 is wound around a tapered coiling shaft, contact resistance is generated between the wire rod 18 and the coiling shaft, so the pushed-out coil is further rotated to improve the adhesion between the coil 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, a brake would be applied to the coil that would tend to slip in the axial direction, resulting in problems such as damage to the bearing as described above.

The present invention aims to solve such conventional problems, and the chuck portion 26 in the coil rotation drive device R is configured by a roller type, that is, it is composed of at least three rollers, and at least two of the rollers are By adopting a structure in which the coiling device is rotationally driven, there is provided a coiling device in which there is no risk of damage to the bearing of the guide roller.

[Means for solving problems]

The coiling device provided by the present invention is an improved version of the coil rotation drive device R in the conventional coiling device described above. That is, the coil rotation drive device is composed of at least three rollers that grip the outer peripheral surface of the coil, and at least two of these three rollers are used as coil drive rollers, and the others are used as coil holding rollers. This is what I did.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. Fig. 1 is a vertical sectional side view of the coil rotation drive device, corresponding to R in Figs. 3 and 4, and Fig. 2 shows the gear of the gear reduction mechanism when the coil rotation drive device of Fig. The configuration of
This figure shows the configuration of the rollers in the chuck portion.

The other configurations, ie, the wire winding device and the drive device, are the same as the conventional wire winding device C and drive device M, so the explanation thereof will be omitted.

In the figure, the same reference numerals as in FIG. 3 indicate the same or equivalent parts. R ₁ is a coil rotation drive device,
It is composed of a gear reduction mechanism G and a chuck portion H.

In the gear reduction mechanism G, is the first bearing frame, is the second bearing frame, and is the third bearing frame. Reference numeral 41 denotes a first gear shaft connected to the rotating shaft 8 in the drive device M (FIG. 3), and 42 denotes a second gear shaft, both of which are supported by the first bearing frame. 43 is a third gear shaft supported by the second bearing frame and the third bearing frame. a is the first gear attached to the first gear shaft 41;
b and c are a second gear and a third gear attached to the second gear shaft 42, and the former b is meshed with the first gear a. d and e are fourth and fifth gears attached to the third gear shaft 43, and d is meshed with third gear c.

In the chuck portion H, is the fourth bearing frame. 44 and 45 are the third bearing frame and the fourth bearing frame.
Two roller drive shafts are supported by the bearing frame, and a sixth gear _f1 and a seventh gear _f2 are respectively attached to the fifth gear e. Drive rollers g ₁ and g ₂ are attached to rotate the coils 25, respectively. A holding roller h holds the coil 25 together with the drive rollers g ₁ and g ₂ and is attached to a roller shaft 46 supported by a fourth bearing frame.

Further, when the coil 25 is rotated by the drive rollers g ₁ and g ₂ of the chuck portion H, it is necessary to rotate the coil 25 in synchronization with the coiling shaft 15. It is the same as that of belt transmission part _V2 .

With such a configuration, when the motor 2 is started, the wire winding device C (FIG. 3) operates in the same manner as in the conventional case and feeds (pushes) the coil 25. On the other hand, when the rotating shaft 8, that is, the first gear shaft 41 rotates and the first gear a rotates, the rotation is caused by the rotation of the second gear b, the third gear c, the fourth gear d, the fifth gear e, and the sixth gear a. , seventh gears f ₁ and f ₂ in order, and is transmitted to the roller drive shafts 44 and 45, so that the drive rollers g ₁ and g ₂ rotate in synchronization with the coiling shaft 15.

The sent out coil 25 is moved to a driving roller.
When inserted between the drive rollers g ₁ , g ₂ and the presser roller h, the coil 25 is held and rotated by the drive rollers g ₁ , g ₂ and the presser roller h.

At this time, the drive rollers g ₁ and g ₂ rotate the coil 25 together with the presser roller h while rotating.
In addition, since it will be gripped, the wire wrapping device C
The thrust load applied to the guide rollers 16, 17 is almost eliminated, and there is no risk that the bearings 23, 24 of these rollers 16, 17 will be damaged.

That is, the chuck portion H only has the function of rotating the coil 25 in synchronization with the coiling shaft 15,
Since the drive rollers g ₁ and g ₂ rotate, the coil 25 that is sent out hardly acts as a brake. Therefore, the guide roller 16,
No excessive thrust load is applied to 17.
The conventional problems described above no longer occur.

〔Effect of the invention〕

As explained above, according to the present invention, the chuck portion is composed of at least three rollers, at least two of which are drive rollers for rotating the coil, and the others are coil pressing rollers. The part will hardly act as a brake on the coil being sent out. Therefore, there is no risk of damage to the bearing due to a thrust load being applied to the guide roller that sends out the coil.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, and is a vertical cross-sectional side view of a coil rotation drive device that is a component thereof.
Fig. 2 is a front view schematically showing the roller configuration of the chuck part and the gear configuration of the gear reduction mechanism in the device, Fig. 3 is a sectional view showing a conventional coiling device, and Fig. 4 is the main part of Fig. 3. It is an enlarged view. C...Wire winding device, _R1 ...Coil rotation drive device, H...Chuck section, G...Gear reduction mechanism,
g ₁ , g ₂ ... Drive roller, h ... Presser roller, 15
... Coiling shaft, 18 ... Wire rod, 25 ... Coil.

Claims (1)

[Claims] 1. A coiling device that includes a wire winding device that spirally winds a wire around a coiling shaft and sequentially sends out the coil, and a coil rotation drive device that grips the sent-out coil with a chuck and rotates it in synchronization with the coiling shaft. In the device, the chuck portion is composed of at least three rollers that grip the outer peripheral surface of the coil, and at least two of these at least three rollers are used as coil driving rollers, and the others are coil pressing rollers. A coiling device characterized by: