JPH0711087Y2 - Cord reel with automatic winding device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cord reel provided with an automatic winding device for winding a drawn cord on a winding drum by automatically rotating the winding drum.

[0002]

2. Description of the Related Art FIG. 1 is a perspective view showing an example of a cord reel with an automatic winding device. Referring to FIG. 1, a side plate 2 and a side plate 3 are provided on both sides of a winding drum in a cord reel 1. A cord 7 is wound around this winding cylinder. An outlet 10 is provided at the tip of the cord 7. The cord 7 is designed to be fed and wound between the guide rollers 8 and 9. A stopper 1 is provided on the cord portion beyond the guide rollers 8 and 9.
1 is attached.

The winding drum is supported by a frame 4.
The automatic winding device 6 is attached so that the winding drum can be rotated to wind the cord 7. The end of the frame 4 is pivotally attached to the fixture 5. The fixture 5 can be attached to, for example, a wall surface.

FIG. 2 is a sectional view showing a conventional cord reel with an automatic winding device. Referring to FIG. 2, the shaft 12 is provided in the winding drum 18. The shaft 12 is supported by the frame 4 at its end. The side plate 2 is rotatably supported on the shaft 12, and the winding drum 18 is supported thereby. The tip of the shaft 12 does not reach the side plate 3.

A power supply cord 13 is passed through the shaft 12, and a through hole 12 formed at an end of the shaft 12 is provided.
Lead wires 13a, 13b, and 13c of the power supply cord 13 extend from a, and the tips of these lead wires are connected to the current collector 1.
4 is electrically connected to the electrode. These electrodes have a ring shape and are held by the electrode holder 14a. Brushes each formed by partially projecting a metal plate are provided so as to face the electrodes held by the electrode holder 14a. These brushes are held by the brush holder 14b. A plurality of through holes are formed in the circumferential portion of the brush holder 14b, and pins 15 and 16 are inserted into the through holes. The pins 15 and 16 are inserted so as to be loosely engaged with the through holes.

The ends of the pins 15 and 16 are supported by the side plate 2. One ends of lead wires 17a and 17b are connected to the brush held by the brush holder 14b, and the lead wires 17a and 17b are connected to one end of the cord 7. The cord 7 is wound around the winding drum 18.

An automatic winding device 6 is attached to the frame on the side plate 3 side.
Is installed. A part of the spring 21 wound around the spring supply drum 22 is forcibly wound around the spring winding drum 20, so that the rotational force of the automatic winding device 6 is accumulated. A side plate rotating rod 23b is provided at the center of the spring winding drum 20, and the spring winding drum 20 is fixed by fitting a spring winding drum bolt 23a into the side plate rotating rod 23b. Side plate rotating rod 23b
The end portion of is fixed to the side plate 3 with a screw. Side plate rotating rod 23
A bearing 28a is provided around the support plate 29b of b.

A spring supply drum bolt 24 is inserted in the center of the spring supply drum 22. A thread portion is formed at the tip of the spring supply drum bolt 24, and this thread portion is screwed to a fixture 28b attached to the support plate 29b.

A ratchet 25 is attached to a portion of the side plate rotating rod 23b before the bearing 28a. The ratchet 25 is engaged with a ratchet pawl 26, and a spring 27 biases the ratchet pawl 26 in a predetermined direction.

When the cord 7 is pulled out from the winding drum 18, the winding drum 18 rotates. The side plate 3 rotates with the rotation of the winding drum 18, and the side plate rotating rod 23b rotates with the rotation of the side plate 3. The spring winding drum 20 is rotated by the rotation of the side plate rotating rod 23b, and the spring 2 is wound around the spring winding drum 20.
1 moves from the spring supply drum 22 and is wound up.
The spring 21 has a curved shape in the direction in which it is wound around the spring supply drum 22. Since the spring 21 is wound around the spring winding drum 20 so as to be curved in the opposite direction, if the force for rotating the spring winding drum 20 is released, the spring 21 will be re-energized. It moves to the side of the spring supply drum 22 so as to be wound around.
Therefore, the spring winding drum 20 rotates to the opposite side.

When the cord 7 is pulled out, the ratchet 25 and the ratchet pawl 26 are engaged by the urging force of the spring 27 so as to prevent such a rotation, and the rotation in the opposite direction is suppressed. Therefore, the spring winding drum 20 winds the spring 21 as the cord 7 is pulled out. After pulling out the cord 7 of a predetermined length and using it, the cord 7 is wound onto the winding drum 1
When it is wound and stored on the cord 8, the cord 7 is pulled a little and then the hand is released to release the cord 7. As a result, the engagement between the ratchet 25 and the ratchet pawl 26 is released, and the spring 21 moves so as to be wound around the spring supply drum 22 and the spring winding drum 20 rotates in the opposite direction.
By the rotation of the spring winding drum 20 in the opposite direction, the side plate rotating rod 23b rotates in the opposite direction, and the winding drum 18 rotates in the opposite direction. The cord 7 is wound around the winding drum 18 by rotating the winding drum 18 in the opposite direction.

When the cord 7 is wound on the winding drum 18,
The stopper 11 provided in the middle of the cord comes into contact with the guide rollers 8 and 9, and the winding of the cord 7 is stopped. In this state, it is preferable that the spring 21 is slightly wound around the spring winding drum 20.

[0013]

As described above, the cord 7 pulled out from the cord reel 1 is wound around the winding drum 18. However, this conventional cord reel with an automatic winding device has the following problems.

In this conventional cord reel with a winding device,
As shown in FIG. 2, the shaft 12 does not support the side plate 3 of the winding drum but supports only the side plate 2. Therefore, misalignment is likely to occur between the shaft 12 and the winding drum 18. Specifically, it is assumed that the winding cylinder 18 receives a large force and is deformed in the direction shown by the arrow A or the arrow B shown in FIG. In this case, since the positional displacement occurs between the winding drum 18 and the shaft 12, the automatic winding device 6
Therefore, when the winding drum is to be rotated, it is difficult to smoothly rotate the winding drum, and in extreme cases, the winding of the cord 7 becomes impossible, which causes a problem.

Therefore, in the conventional cord reel with an automatic winding device, the cord for winding cannot be wound because the side plate or the like is only slightly stressed and the rotation for winding is difficult. In addition, if the side plate or the like is greatly deformed, the rotation of the winding drum is hindered and it cannot be used.

An object of the present invention is to provide a cord reel with an automatic winding device, in which a winding drum portion such as a side plate is not easily deformed and, even if the winding drum portion is deformed, the winding drum portion can be smoothly rotated to wind a cord. To provide.

[0017]

A cord reel with an automatic winding device according to the present invention comprises a fixed frame, a winding cylinder around which the cord is wound, and first and second fixing reels fixedly provided on both sides of the winding drum. It is provided with a side plate, a joint portion, a shaft, and an automatic winding device. The joint portion is fixedly provided at the center of the first side plate and has a through hole penetrating in the rotation axis direction. The shaft has one end fixed to the fixed frame and the other end penetrating the second side plate and extending to the through hole of the joint portion to rotatably support the winding drum and the first and second side plates. The automatic winding device includes a rotating shaft that is provided on a fixed frame, is fitted into a through hole of a joint portion from the outside, and rotates together with the joint portion, and a rotating force applying unit that applies a rotating force to the rotating shaft in a cord winding direction. Have.

[0018]

In the cord reel of the present invention, the shaft, one end of which is fixed to the fixed frame, extends through the second side plate to the through hole of the joint portion to rotate the winding drum and the first and second side plates. Supports possible. Therefore,
There is no displacement between the shaft and the winding drum,
The winding drum can always be rotated smoothly.

In the cord reel of the present invention, the automatic winding device is further provided on the fixed frame. This automatic winding device has a rotating shaft that is fitted into the through hole of the joint portion from the outside and rotates together with the joint portion, and a rotating force applying means that applies a rotating force in the cord winding direction to the rotating shaft. Since the rotary shaft that transmits the rotational force to the joint portion supports the first side plate via the joint portion, the strength of the support structure for the winding drum can be improved. Furthermore, since the rotary shaft of the automatic winding device is only fitted into the joint portion from the outside, the automatic winding device can be easily separated from the winding drum portion.

[0020]

FIG. 3 is a sectional view showing a cord reel with an automatic winding device according to an embodiment of the present invention. With reference to FIG. 3, in this embodiment, the tip of a shaft 30 that allows the winding drum 18 to rotate extends from the second side plate 2 to the first side plate 3. The tip of the shaft 30 is inserted into a hole inside the joint portion 32 attached to the side plate 3. This hole is formed in such a size that a slight gap is formed between the hole and the shaft 30.

A tip end portion 31a of a rotary shaft 31 provided at the center of the spring winding drum 20 is formed in a quadrangular prism shape, and this quadrangular tip end portion 31a is formed in a square hole outside the joint portion 32. It is fitted. The hole of the joint portion 32 is sized to form a slight gap with the tip portion 31a of the rotating shaft.

Further, in the cord reel of this embodiment, a coil spring 33 having one end inside the frame and the other end contacting the outside of the side plate 2 is provided by being fitted into the shaft 12. Due to the presence of the coil spring 33, the entire winding drum 18 is urged toward the automatic winding device 6. By this urging force, the tip portion 31a of the rotating shaft and the joint portion 3
The engagement with 2 is ensured.

In the embodiment shown in FIG. 3, the parts other than those described above are substantially the same as those of the conventional cord reel shown in FIG. 2. Therefore, the description thereof will be omitted by giving the corresponding reference numerals.

FIG. 4 is an exploded perspective view of the cord reel shown in FIG. With reference to FIG. 4, the automatic winding device including the spring winding drum 20, the spring supply drum 22, and the like provided on the support plate 29b is attached to the frame 4. At this time, the joint portion 32 is screwed to the central portion of the side plate 3 so that the distal end portion of the rotary shaft is inserted into the rectangular hole of the joint portion 32.

FIG. 5 is a perspective view showing a winding device used for the cord reel shown in FIG. 3, and FIG. 6 is also a perspective view showing an automatic winding device used for the cord reel shown in FIG. . FIG. 6 is a perspective view seen from the back side of FIG.

FIG. 7 is an exploded perspective view showing an automatic winding device used for the cord reel shown in FIG. Referring to FIG. 7, rotating shaft 31 is inserted in the center of spring winding drum 20. A portion of the rotary shaft 31 opposite to the tip portion 31a is also formed in a quadrangular prism shape, and the ratchet 25 is inserted into the quadrangular prism portion. A threaded hole is formed in the center of the rotary shaft 31, and the spring winding drum bolt 23a is screwed into this hole. A ratchet pawl 26 is provided on the outer peripheral portion of the ratchet 25 so that the ratchet pawl 26 can be engaged with the ratchet pawl 26. The ratchet pawl 26 is supported by a support plate 29b by a pawl support bolt 34. The other end of the spring 27, one end of which is attached to the ratchet pawl 26, is supported by a support plate 29b by a spring fixing bolt 35.

A spring supply drum bolt 24 is rotatably inserted in the center of the spring supply drum 22. The screw portion at the tip of the spring supply drum bolt 24 is fixed by being screwed into a screw hole formed in the center of a fixture 28b screwed to the support plate 29b.

FIG. 8 is a perspective view showing a rotary shaft 31 and a joint portion 32 used in the cord reel shown in FIG.
As shown in FIG. 8, the square columnar tip 31a of the rotary shaft 31 is fitted into and engaged with a square hole formed in the center of the joint 32.

FIG. 9 is a sectional view showing a state in which the rotary shaft is inclined relative to the joint portion. As shown in FIG. 9, a slight gap is formed between the tip portion 31 a and the hole at the center of the joint portion 32. Therefore, even when the joint portion 32 is relatively inclined with respect to the rotating shaft 31, the joint portion 32 and the tip end portion 31a of the rotating shaft are engaged, and the rotation of the rotating shaft 31 is transmitted to the joint portion 32. Can be transmitted. Therefore, in the cord reel of this embodiment, even when the winding barrel portion is deformed, the rotation can be transmitted without giving a torque that suppresses the rotation of the rotating shaft 31.

Referring to FIG. 3, in this embodiment, since the shaft 30 extends to the side plate 3 and rotatably supports not only the side plate 2 but also the side plate 3, the force applied to the side plate 3 is applied to the shaft 30. Therefore, the entire winding drum portion is less susceptible to deformation.

Further, the rotary shaft 31 is not directly attached to the side plate 3, but the side plate 3 is rotated via the joint portion 32. Further, since the tip end portion 31a of the rotary shaft 31 and the joint portion 32 are engaged with each other with a slight clearance, the rotation of the rotary shaft 31 is transmitted to the side plate 3 even when the rotary shaft 31 and the side plate 3 are slightly inclined. can do. Therefore, even if the winding drum portion is deformed, the winding drum portion can be smoothly rotated. Moreover, the pulled-out cord 7 can be smoothly wound around the winding drum portion.

Further, since the rotary shaft 31 is not directly attached to the side plate 3, the automatic winding device 6 in this embodiment can be easily attached to and detached from the reel section. Therefore, the automatic winding device and the reel unit can be separately manufactured in the assembly process and then combined, and the manufacturing process can be simplified as compared with the related art. Therefore, it is possible to manufacture the cord reel at a lower cost than the conventional one.

Further, it is preferable that the spring 21 is slightly wound around the spring winding drum 20 when the stopper 11 is in contact with the guide rollers 8 and 9 as described above. By keeping this state
The stopper 11 comes into contact with the guide rollers 8 and 9.
When winding, the spring winding drum 20 rotates to the side opposite to the winding due to inertial force.
You can prevent it from rolling. In order to set such a state, it is necessary to set the automatic winding device 6 in a state where a predetermined amount of the spring 21 is wound around the spring winding drum 20. In this device, the automatic winding device is assembled separately,
Since it can be manufactured by combining this with the reel part,
The spring winding drum 20 of the automatic winding device 6 can be preliminarily wound in a predetermined amount before being combined with the reel portion, and the reel portion can be combined in such a state.

Further, in the cord reel of the present invention, since the automatic winding device and the reel portion can be attached and detached, only the automatic winding device or the cord reel portion can be replaced and repaired when damaged.

[0035]

As described above, in the cord reel with the automatic winding device of the present invention, the winding drum portion is not easily deformed, and the winding drum portion can be smoothly rotated even if the winding drum portion is deformed. it can. Therefore, the cord can be smoothly wound.

Further, since the automatic winding device of the present invention can be attached to and detached from the reel portion, it is easy to assemble and can be manufactured at a lower cost than before.

When it is damaged, only the automatic winding device or the cord reel portion can be replaced and repaired.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a cord reel with an automatic winding device.

FIG. 2 is a sectional view showing a conventional cord reel with an automatic winding device.

FIG. 3 is a sectional view showing a cord reel with an automatic winding device according to an embodiment of the present invention.

FIG. 4 is an exploded perspective view of the cord reel shown in FIG.

5 is a perspective view showing an automatic winding device used for the cord reel shown in FIG. 3. FIG.

6 is a perspective view showing an automatic winding device used for the cord reel shown in FIG. 3. FIG.

7 is an exploded perspective view showing an automatic winding device used for the cord reel shown in FIG.

8 is a perspective view showing a rotary shaft and a joint portion used in the cord reel shown in FIG.

FIG. 9 is a cross-sectional view showing a state in which the rotation axis is relatively inclined with respect to the joint portion.

[Explanation of symbols]

 1 Code reel 2,3 Side plate 4 Frame 5 Fixture 6 Automatic winding device 7 Code 8,9 Guide roller 10 Outlet 11 Stopper 13 Power supply cord 14 Current collector 18 Winding drum 20 Spring winding drum 21 Spring 22 Spring supply drum 23a Spring take-up drum bolt 24 Spring supply drum bolt 25 Ratchet 26 Ratchet claw 27 Spring 30 Shaft 31 Rotating shaft 31a Rotating shaft tip 32 Joint part 33 Coil spring 34 Claw supporting bolt 35 Spring fixing bolt

Claims (1)

[Scope of utility model registration request] 1. A fixed frame, a winding cylinder around which a cord is wound, first and second side plates fixedly provided on both sides of the winding cylinder, and fixed to a central portion of the first side plate. A joint portion provided with a through hole penetrating in the rotation axis direction, one end fixed to the fixed frame, the other end penetrating the second side plate and extending to the through hole of the joint portion, A shaft that rotatably supports the first and second side plates on the trunk, a rotary shaft that is provided on the fixed frame, is fitted into the through hole of the joint portion from the outside, and rotates together with the joint portion. A cord reel with an automatic winding device, comprising: an automatic winding device having a rotational force applying means for applying a rotational force to a shaft in a cord winding direction.