JPH0925061A - Drum cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out smooth motive power transmission to an electric wire drum 20 from a rotating roller 35 of a drum drive device 30. SOLUTION: A ring part 1b is installed on an electric wire drum 20. The ring part 1b transmits rotational driving force to the electric wire drum 20 from a rotating roller 35 by making rolling contact with the rotating roller 35 of a drum driving device 30. Consequently, it is possible to carry out smooth motive power transmission regardless of a surface state of the electric wire drum 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum cover, and more particularly to a drum cover most suitable for an electric wire drum used when supplying electric wires to an automatic electric wire processing apparatus.

[0002]

2. Description of the Related Art Generally, when supplying a long electric wire to an automatic electric wire processing apparatus, an electric wire to be supplied to an electric wire drum is wound, and the end portion of the winding end is sequentially fed out. The electric wire drum is formed in a reel shape in which flange portions are integrally provided on both ends of a core material, and the material thereof is generally made of resin or wood. There is known a drum drive device that rotatably supports the electric wire drum in order to feed the electric wire from the electric wire drum (for example, Japanese Utility Model Laid-Open No. 63-71974). In that configuration, on the two pairs of rotating rollers, the wire drum is placed so that the rotating rollers and the outer peripheral surface of the flange portion make rolling contact, and by rotating one of the rotating rollers by a motor, The rotation driving force is transmitted to the electric wire drum.

[0003]

When the electric wire drum is rotated by the above-mentioned drum driving device, when the electric wire drum is new and the flange portion thereof forms a smooth outer peripheral surface, there is a comparatively trouble. It is possible to rotate the wire drum without. However, when the outer peripheral surface of the flange portion is worn or damaged and has a large undulation, the rolling resistance of the outer peripheral surface of the flange portion with respect to the rotating roller becomes large, and a large load acts on the motor for driving the rotating roller.
There was a problem such as the motor generating heat. In particular, when the flange portion is made of wood, the flange portion is easily worn and damaged, and the undulating portion of the outer peripheral surface may be caught by the rotating roller, and some rotating rollers may idle around the flange portion. Further, since the diameter of the flange portion of the electric wire drum varies, it is necessary to provide a mechanism for adjusting the position where the rotary roller contacts the flange portion in accordance with the diameter of the flange portion. Was getting expensive.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a drum cover capable of reliably transmitting the rotational driving force of the drum driving device to the electric wire drum. Another object of the present invention is to provide a drum cover in which a mechanism for adjusting the position of the rotating roller can be omitted from the drum driving device.

[0005]

In order to solve the above-mentioned problems, the structure according to claim 1 of the present invention is arranged concentrically with an electric wire drum to which a rotary driving force is transmitted from a rotary roller of a drum driving device, A ring portion capable of transmitting a rotational driving force to the electric wire drum by rolling contact with the rotating roller,
And a mounting means for mounting the ring portion on the electric wire drum.

According to a second aspect of the present invention, in the drum cover according to the first aspect, the ring portion has an outer peripheral surface having a largest outer diameter among a plurality of types of electric wire drums to be mounted. To cover. Claim 3
The configuration described is the drum cover according to claim 1,
The ring portion is formed to have a diameter smaller than the outer diameter of the electric wire drum to which the ring portion is attached.

According to a fourth aspect of the present invention, in the drum cover according to the third aspect, the ring portion is fixed to an end surface of a plurality of types of electric wire drums to which the ring portion is to be attached, which has the smallest outer diameter. It is what is done. In the configuration according to the first aspect, when the rotational driving force is transmitted to the electric wire drum, the ring portion can be an input member for the rotational driving force.

Further, in the configuration according to claim 2 or 4,
Regardless of the outer diameters of the plurality of types of electric wire drums to which the ring portion is to be attached, the electric wire drum can be rotationally driven by using the ring portion having the same diameter as the input member. Further, in the structure according to the third aspect, it is possible to partition the working space between the outer peripheral surface of the ring portion and the end surface of the electric wire drum when the ring portion is attached and detached.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of a drum cover and an electric wire drum according to an embodiment of the present invention, and FIG. 2 shows an external appearance of a drum drive device for rotationally driving the electric wire drum equipped with the drum cover of FIG. 3 is a schematic perspective view showing an internal configuration of the drum driving device of FIG. 2, and FIG.
It is sectional drawing of the electric wire drum which mounted the drum cover of FIG.

Referring to FIGS. 1 and 2, a drum cover 10 of the present embodiment has a pair of cover pieces 1, 1 and a bolt 2 and a nut 3 for fixing the cover pieces 1, 1 to the electric wire drum 20. It consists of and. The electric wire drum 20 in the present embodiment is a reel-shaped wooden product in which flange portions 22 having a larger diameter than the core material 21 are fixed to both ends of the core material 21 with bolts 23 arranged at equal intervals on the same circumference. And has an insertion hole 24 in the center. The coated electric wire W is wound around the core material 21 of the electric wire drum 20.

Then, each cover piece 1 in this embodiment.
Is a circular end plate 1a formed in the same shape as the flange portion 22 and a ring portion provided on the outer peripheral portion of the end plate 1a and projecting at a right angle to the end plate 1a to cover the outer peripheral surface of the flange portion 22. 1b and a metal member integrally formed with each other, and preferably made of a material having relatively high rigidity such as steel.

A ring portion 1b is provided at the center of the end plate 1a.
A boss portion 1c is formed so as to project in the direction in which is projected. The boss portion 1c has a through hole 24 for the electric wire drum 20.
It is for fitting in and positioning the end plate 1a on the electric wire drum 20. Further, the end plate 1a is formed with an opening hole 1d for opening the bolt 23 of the electric wire drum 20.

The ring portion 1b has a perfect circle with a smooth outer peripheral surface and is subjected to a surface treatment capable of rolling contact with a rotary roller 31 of a drum driving device 30 which will be described later. The bolt 2 for fixing the cover pieces 1 and 1 to the electric wire drum 20 has a resin handle 2a attached to one end thereof. Also, the nut 3 has a resin handle 3a similar to the handle 2a of the bolt 2 mounted on the outer circumference. Cover pieces 1 and 1 for electric wire drum 2
When mounting on 0, first, the flange portions 22 of the electric wire drum 20 are covered with the cover pieces 1 and 1, and the other end portion of the bolt 2 is inserted from the outside of the one cover piece 1 into the boss portion 1c and the other end portion is inserted. The nut 3 may be projected from the outside of the cover piece 1 and screwed from the outside of the other cover piece 1.

Next, the drum drive device 30 employed for rotationally driving the electric wire drum 20 will be described with reference to FIGS. 2 and 3. This drum driving device 30
The outer casing is formed by a box-shaped casing 31. An opening 32 is provided on the upper surface of the casing 31, and two pairs of rotating rollers 35 fixed to the pair of rotating shafts 33 and 34 arranged in parallel are exposed in the opening 32. are doing. Each rotating shaft 33 is rotatably supported by the casing 31 by a bearing (not shown). One of the rotating shafts 33 is used for the power transmission mechanism 3
Is connected to a motor 37, which is a drive source, via 6,
As shown in the figure, it is driven to rotate in one rotation direction.
The electric wire drum 20 is attached to the rotary shafts 33 and 34.
The electric wire drum 20 is placed on each rotary roller 35 from the opening 32 with the rotation centers of the two parallel to each other, and the one rotary shaft 33 is rotatably driven. Wire drum 20 placed on top
Can be driven to rotate.

Here, in this embodiment, by mounting the drum cover 10 on the electric wire drum 20, the ring portion 1b of the drum cover 10 is in rolling contact with each corresponding rotary roller 35. Therefore, when the rotary shaft 33 is driven and the rotary roller 35 attached to the rotary shaft 33 rotates, the rotary drive force is transmitted to the ring portion 1b in rolling contact with the rotary roller 35, and the electric wire drum 20 moves. It will rotate. As described above, the ring portion 1b of the present embodiment is configured so that the rotary roller 3
When the rotational driving force is transmitted from 5 to the electric wire drum 20,
It serves as an input member for the rotational driving force.

By the way, the outer diameter of the above-mentioned electric wire drum 20 is set to be different. Therefore, in the present embodiment, as shown in FIG. 4 (A), of the plurality of types of electric wire drums 20 to which the ring portion 1b is to be attached, the outer peripheral surface of the one having the largest outer diameter Dmax should be covered. The inner diameter d of the ring portion 1b is set so that As a result, as shown in FIG. 4B, when the drum driving device 30 as described above is used, the ring portion 1
Outer diameter D of the plurality of types of electric wire drums 20 to which b is to be mounted
Regardless, the electric wire drum 20 can be rotationally driven by using the ring portion 1b having the same diameter as the input member.

Further, as another embodiment, FIG.
As shown in (B), the outer diameter Dr of the ring portion 1b may be set to be smaller than that having the smallest outer diameter Dmin among the plurality of types of electric wire drums 20 to which the ring portion 1b is to be mounted. In this case as well, by placing the ring portion 1b on the above-described rotating roller 35, the electric wire drum 20 can be used regardless of the outer diameter D of the electric wire drum 20 by using the ring portion 1b having the same diameter Dr as the input member. It can be driven to rotate.
5A and 5B, when the ring portion 1b is attached and detached, a working space S is provided between the outer peripheral surface of the ring portion 1b and the end surface of the flange portion 22. It becomes possible to partition.

In the embodiment of FIGS. 5A and 5B, the boss portion 1c receives the tightening load of the bolt 2 and the nut 3, so that the boss portion 1c has a step portion 1e flush with the end face of the ring portion 1b. Are formed. With the configuration described above,
When the rotary driving force is transmitted from the rotary roller 35 to the electric wire drum 20, the ring portion 1b can be used as an input member of the rotary driving force, so that the material and the surface condition of the flange portion 22 of the electric wire drum 20 can be taken into consideration. As a result, smooth power transmission can be achieved, and as a result, the remarkable effect that the rotational driving force by the drum driving device 30 can be reliably transmitted to the electric wire drum 20.

When the dimension settings shown in FIGS. 4 and 5 are adopted, the ring portion 1 having the same diameter is used regardless of the outer diameters D of the plural kinds of electric wire drums 20 to which the ring portion 1b is to be mounted.
Since the electric wire drum 20 can be rotationally driven by using b as an input member, the position where the rotating roller 35 makes rolling contact with the ring portion 1b can be made uniform regardless of the outer diameter of the electric wire drum 20. There is an advantage that the mechanism for adjusting the position of the roller 35 is eliminated and the inexpensive drum driving device 30 can be used accordingly.

In particular, when the dimension setting shown in FIG. 5 is adopted, when the ring portion 1b is attached and detached, a working space S is defined between the outer peripheral surface of the ring portion 1b and the end surface of the electric wire drum 20. Since there is no need to lift the electric wire drum 20 when attaching or detaching the ring portion 1b, there is also an advantage that the work is facilitated. Note that the above-described embodiments are merely examples of preferred examples of the present invention, and the present invention is not limited to the above-described embodiments. It goes without saying that various design changes other than the above are possible.

[0021]

As described above, according to the first aspect of the present invention.
In the configuration described above, when the rotational driving force is transmitted from the rotating roller to the electric wire drum, the ring portion can be used as an input member of the rotational driving force, so that the smooth power can be obtained regardless of the surface state of the electric wire drum. As a result of being able to communicate,
The remarkable effect that the rotational driving force by the drum driving device can be reliably transmitted to the electric wire drum is achieved.

Further, in the configuration according to claim 2 or 4,
Regardless of the outer diameter of a plurality of types of electric wire drums to which the ring portion should be attached, the electric wire drum can be rotationally driven by using the ring portion having the same diameter as an input member, so that the rotating roller is in contact with the ring portion at a position where it rolls. Can be standardized regardless of the outer diameter of the electric wire drum, and as a result, the mechanism for adjusting the position of the rotating roller can be eliminated, and accordingly, an inexpensive drum driving device can be used. is there.

Further, according to the third aspect of the present invention, when the ring portion is attached and detached, it is possible to define a working space between the outer peripheral surface of the ring portion and the end surface of the electric wire drum. There is also an advantage that it is not necessary to lift the electric wire drum when attaching or detaching the portion, and the work is easy.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a drum cover and an electric wire drum according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an outer appearance of a drum driving device for rotationally driving the electric wire drum equipped with the drum cover of FIG.

FIG. 3 is a schematic perspective view showing an internal configuration of the drum driving device of FIG.

FIG. 4 is a cross-sectional view of an electric wire drum equipped with the drum cover of FIG.

FIG. 5 is a cross-sectional view of an electric wire drum equipped with a drum cover according to another embodiment of the present invention.

[Explanation of symbols]

 1 Cover Piece 1b Ring Part 2 Bolt (Mounting Means) 3 Nut (Mounting Means) 10 Drum Cover 20 Electric Wire Drum 30 Drum Drive Device 35 Rotating Roller

Claims (4)

[Claims] 1. A ring portion, which is concentrically arranged on an electric wire drum to which a rotary driving force is transmitted from a rotary roller of a drum driving device, and which can transmit the rotary driving force to the electric wire drum by rolling contact with the rotary roller. A drum cover, comprising: a mounting means for mounting the ring portion to the electric wire drum. 2. The drum cover according to claim 1, wherein the ring portion covers the outer peripheral surface of the one having the largest outer diameter among the plurality of types of electric wire drums to which the ring portion is to be mounted. 3. The drum cover according to claim 1, wherein the ring portion has a diameter smaller than the outer diameter of the electric wire drum on which the ring portion is to be mounted. 4. The drum cover according to claim 3, wherein the ring portion is fixed to an end surface of a wire drum having a smallest outer diameter among a plurality of types of electric wire drums to be mounted.