JPS5923001Y2 - Spool device with buffer mechanism - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a spool device for winding up paper, etc.

In particular, it relates to a spool device attached to a device that needs to wind up paper etc. intermittently, and an example of a device that winds up paper intermittently is a printer device, so the following description will be related to printer devices. explain.

In printer equipment, the ejected paper is sequentially wound by a spool device in order to maintain a certain tension on the paper during printing, or to speed up the post-processing of the printed and sequentially ejected paper. taken.

Moreover, this winding is intermittent, and of course it stops during printing, and when printing is completed, the spool rotates in response to a signal to wind up the paper by a certain specified amount, and then stops.

Thereafter, by repeating these stopping and winding operations, the paper is wound up by a predetermined amount.

The problem with conventional mechanisms during this winding is the impact that is applied to the spool device and the spool device drive mechanism on the equipment side.Especially in the case of printer equipment, it is difficult to ensure that the paper is wound accurately according to the specified amount. The drive mechanism has a complicated structure, and if a sudden shock is applied at the start of the drive, it may be difficult to maintain accuracy or cause a failure.

The present invention has been devised in view of this point, and will be explained below based on one embodiment shown in the drawings.

In FIG. 2, 1 is a spool main body, which is formed from a hollow winding shaft 2 and a flange 3.

Counterbore holes 2b and 2C are formed in the hollow portion 2a of the hollow winding shaft 2, and 2d and 2e are the bottom surfaces of the respective counterbores.

Reference numeral 4 denotes a rotating shaft, which has a groove 4a formed on its circumference (FIG. 4), and is loosely inserted into the hollow portion 2a of the spool body 1.

Reference numeral 5 designates a hollow holder having a hollow portion 5a and a groove 5b formed on the outer periphery of the hollow portion 5a, and a hole 5C formed in the bottom of the iron 5b (FIG. 3).

The hollow holder 5 is fixed to the rotating shaft 4.

Reference numeral 6 denotes a gear wheel, which has a hole 6a formed in its side surface and is loosely fitted onto the rotating shaft 4.

Reference numeral 7 denotes a bearing, which has a groove 7a formed on its outer periphery, and is loosely fitted onto the rotating shaft 4.

Reference numeral 8 denotes an E-shaped tongue, which has elasticity and is fitted into the groove 4a of the rotating shaft 4.
are embedded in each.

Reference numeral 9 denotes a 1-john spring member, which is built into the groove 5b of the hollow spring holder 5, and its ends 9a and 9b are engaged with the hole 5c of the hollow spring holder 5 and the hole 6a of the gear wheel 6, respectively. There is.

Reference numeral 1o denotes a compression elastic fitting 'a, which is inserted through the rotary shaft 4 and built into the counterbore hole 2b of the hollow winding shaft 2.

The built-in compressive elastic spring 10 acts as a force to push the rotating shaft to the left by pushing the E-shaped tongue 8 on the left side, but the E-shaped spring 8 on the right side countersinks the counterbore hole 2c. The rotary shaft 4 is prevented from moving to the left by contacting the bottom surface 2e.

Next, an explanation will be given of the operation when the device of the present invention is used for winding up paper in a printer device as shown in FIG.

Reference numeral 11 denotes a printer device, which is equipped with a spool device according to the present invention, and winds up the paper 14 by rotating the spool device clockwise.

12 is a driving force transmission mechanism for rotating the spool device, and includes a gear 13.

The gear 13 meshes with the gear wheel 6 of the spool device.

When the drive force transmission mechanism starts operating by a drive source (not shown) in response to input of a paper winding signal, the gear 13 rotates to the left by a predetermined amount.

Then, the gear wheel 6 of the spool device rotates clockwise and at the same time twists the torsion spring member 9, so that the 1-john spring member 9 stores energy.

The driving force transmission mechanism 12 stops operating when it operates by a specified amount, but cannot rotate in the opposite direction, so the I.
- The spring spring member 9 then rotates the rotary shaft 4 to the right via the hollow spring holder 5 in an attempt to recover by the amount of twist.

Since the rotating shaft 4 is attached to the printer device by a bearing 7, it can rotate smoothly.

The rotational force of the rotating shaft 4 is transmitted to the spool body 1 by the frictional force between the E-shaped tongue 8 obtained by the compression elastic spring 10, the hollow winding shaft 2, and the rotating shaft 4, and the spool body 1 is connected to the rotating shaft 4. It rotates as one unit and winds up the paper.

In this embodiment, the hollow winding shaft and the flange are integrated as a spool body, but the present invention is not limited to this.

Similarly, although a gear train is used as a method for transmitting the driving force from the printer device, it is also possible to use a belt or the like, and is not limited to the gear wheel of the spool device.

Although the 1.-John spring member is also built into the hollow spring holder, it is also possible to wrap it directly around the outer circumference of the rotating shaft, or it may be a mainspring.

Furthermore, it is also possible to arrange the compression elastic spring outside the circle of the hollow winding shaft without incorporating it, and the purpose of the present invention can be distantly related to the purpose of the present invention if it is not limited to a spring but is an elastic body. .

The present invention has the above-mentioned configuration, and in order to rotate the spool after storing the driving force of the equipment equipped with the spool device using one to one springs, etc., the rotational force is gradually transmitted. It operates smoothly without being subjected to sudden shocks, and can protect the spool device and the drive mechanism of the equipment.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the spool device according to the present invention, Figure 2 is a sectional view along the center line of Figure 1, Figures 3 and 4 are exploded perspective views of Figure 2, and Figure 5 is the spool device of the present invention. Figure s. FIG. 2 is a perspective view showing a state in which a pool device is installed in a printer device. 1...Spool body, 2...Hollow winding shaft, 4...Rotating shaft, 6...Gear wheel, 8...E type 9... Torsion spring member, 10... Compression elastic spring, 11...
...Printer equipment.

Claims (1)

[Claims for Utility Model Registration] A take-up spool having a rotating shaft portion, a driving force source, and a winding spool that is loosely fitted to the rotating shaft portion and is rotated by a certain amount by the driving force source for each manual force of a winding signal. a non-reversible wheel member that is held at one end by the wheel member and the other end is held at the rotating shaft side of the spool, and the rotation of the wheel member generates energy in the same direction as the rotation of the wheel member; The driving force of the driving force source is once charged to the 1.-John spring member, and the charged energy rotates the spool to release paper, etc. A spool device with a buffer mechanism, characterized in that the spool device is configured to take up the material in the feeding direction.