JPS6318010Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a winding device for long sheets (e.g., microfilm, movie film, magnetic tape, etc.), and in particular, winds a rolled sheet around a take-up reel shaft. The purpose is to improve the stability and reliability of winding when attaching.

First, a microfilm reader illustrated in FIG. 1 will be described as an example of a sheet winding device to which the present invention is applied. The tip of the microfilm F wound in a roll on a reel in the cartridge 1 is sent out by a capstan roller 2 driven by a motor 3, and wound onto the core 81 of a take-up reel 8 which is being driven and rotated by a motor ₇ . In response to the winding completion detection signal, the capstan roller 2 is moved back from the film surface by a solenoid mechanism 5 or the like, and its drive motor 3 is stopped, and thereafter the film is wound onto the reel 8 by the winding motor. be.

In the figure, 4 is a film rewinding motor, 6 ₁ and 6 ₂ are film guide rollers, 16 is an illumination lamp, and 17
18 is a condenser lens, and 18 is a projection lens.

In the above configuration, the means shown in FIG. 2 is used to wind the leading end of the microfilm F fed from the cartridge 1 around the take-up reel core ₈₁ . That is, a plurality of pressing rollers 9 ₁ to 9 ₃ are supported by arc-shaped guide plates 10 and arranged at approximately equal intervals around the outer periphery of the reel core 8 ₁ . Guide plate 10
is rotatable around the shaft 11 and always has a spring 12.
This causes the pressing rollers 9 ₁ to 9 ₃ to press the film F with a pressing force P.

Here, the leading edge of the film F is fed from the guide roller ₆₂ to the reel 8, and in the case shown in the figure, after passing through three arc-shaped guide plates 10 and pressing rollers ₉₁ to ₉₃ , it goes around the take-up reel core ₈₁ once. When the film F forms a loop, it overcomes the pressing force P of the pressure roller due to the hardness and curling of the film type, and forms a loop on the circumferential surface of the reel core ₈₁ .
The inner circumferential surface F ₁ of F 1 does not contact, and as a result
The drawback was that winding was difficult due to the frictional force of _{1.F 1} .

The present invention eliminates the drawbacks of the conventional example and provides an adjustable winding device so that the film can be wound around the take-up reel in a stable manner regardless of the type of film (sheet). At least one of the pressing rollers 9 ₁ to 9 ₃
The gist is that the two pressing forces P can be adjusted.

Figure 3a illustrates three pressure rollers, the third
This shows an embodiment in which the pressing force of the th pressing roller ^9c is adjusted.
The stopper 13 at one end of the spring 12 ₃ , which applies a pressing force through the spring 12 ₃ This is to adjust the pressing force _P3 on the take-up reel core ₈₁ .

Now, the pressing force _P3 of the third pressing roller ₉₃ is the pressing force P1 and _P2 of the first and second pressing rollers ₉₁ and _{92 .}
Adjust the tension of the spring 12 ₃ so that it becomes larger. In other words, the pressing force _P3 of the pressing roller through which the leading edge of the film F passes last is set to be the largest. When the leading edge of the film F passes between the pressure roller 9 ₁ and the take-up reel core 8 ₁ ,
Depending on the hardness and curl state of the film F, the pressure roller _P1 is slightly rotated about the fulcrum 11 in the direction away from the take-up reel core ₈₁ (No. 3a).
figure). The same applies to the second pressure roller ₉₂ (the third
Figure b).

Next, the tip of the film F is placed on the third pressing roller 9.
₃ and the take-up reel core ₈₁ . However, since the pressing force P ₃ of the pressing roller 9 ₃ is greater than the pressing force of the other pressing rollers, the above-mentioned degree of separation is small, and the leading end of the film F is brought into contact with the take-up reel core 8 ₁ and held there. Therefore, the leading edge of the film continues to move forward due to the frictional force with the rotating take-up reel core ₈₁ , and is sandwiched between the loop-shaped film and the take-up reel 1 (Fig. 3c), and gradually becomes a loop as the take-up reel rotates. becomes smaller and the winding is completed as shown in Fig. 3d.

Note that the number of pressing rollers is not limited to three as shown in the illustrated example. Further, the magnitude of the pressing force can be distributed such that, for example, the second to last pressing roller is at its maximum. Although the coil spring 12 was used to obtain the pressing force, a torsion spring or a plate spring may also be used. Further, the tension of the spring can be adjusted by adjusting the support fitting 13 by moving it forward or backward using an elongated mounting hole or an eccentric cam.

Since the present invention has the above-mentioned configuration, it is possible to always ensure smooth operation by adjusting the pressing force of at least one pressing roller on the take-up reel core according to the type of the target sheet, that is, its hardness and curl state. The starting end of the sheet can be wound around the take-up reel. In addition, there is an effect that it is not affected by variations in the pressing force of the pressing roller.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the structure of a film reader to which the present invention is applied, Figure 2 is a front view of a conventional winding section, and Figure 3 is a schematic diagram of the structure of a film reader to which the present invention is applied.
Figures a, 3b, 3c, and 3d are front views illustrating the structure and operating state of the winding unit of the present invention. F is a sheet, 8 is a take-up reel, 8 ₁ is a take-up reel core, 9 ₁ , 9 ₂ , 9 ₃ are pressure rollers, P ₁ , P ₂ ,
P ₃ is the pressing force of each roller, and 13, 14, and 15 are pressing force adjustment members.

Claims (1)

[Scope of utility model registration request] In a sheet winding device that automatically feeds the leading edge of a sheet and winds it around a take-up reel, a plurality of pressure rollers that press the sheet in the direction of the take-up reel core are arranged spaced apart in the rotational direction of the core. A sheet winding device characterized in that the pressing force of at least one pressing roller is adjustable.