JPH0724356Y2 - Film sheet feeding mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a film sheet feeding mechanism provided in a film thickness measuring instrument for measuring the thickness of a film sheet.

[Prior Art] After production of plastic films, variation in thickness is controlled by a film thickness measuring device.

The thickness of the cut sample is continuously measured by a film feeding device in the film thickness measuring device, and the change in the thickness is displayed on the electronic micrometer and continuously recorded on the recorder.

FIG. 4 (a) is a front view showing a film sheet feeding mechanism portion of a conventional film sheet feeding device, and FIG. 4 (b) is a partially enlarged top view.

As shown in the figure, the thickness of the relatively thin film sheet 10a is measured by the measuring unit 31 provided in the central portion of the panel 30. The film sheet feeding mechanism 32 includes a motor-driven roller 33 and a pinch roller 35. The rotation of the roller 33 causes the film sheet 10a to be conveyed in the A direction while being sandwiched between the film sheet 10a and the pinch roller 35. Thus, the measuring unit 31 can perform continuous measurement.

The pinch roller 35 is rotatable about a shaft 39 provided at one end 36a of the rotating arm 36, and a pin hole 39a is provided in the shaft 39 on the rear surface of the panel, and one end of the lever piece 37 is provided with a pin 39b. It is connected and fixed with.

The lever piece 37 is constantly pulled by the tension spring 38, so that the pinch roller 35 obtains an urging force in a direction in which the pinch roller 35 contacts the roller 33.

By the way, the pinch roller 35 and the roller 33 can be easily inserted because they are opened at a predetermined interval when the film sheet 10a is inserted.

For this reason, the changeover switch 40 that rotates around the shaft 40b is provided on the front surface of the panel 30, and the projection 40a that engages with the lever piece 37 is provided on the rear surface of the changeover switch 40, so that the changeover switch 40 is "OPEN" in the figure. When turned to the side, the pinch roller 35 separates from the roller 33.

The film sheet 10a described above has been described as being relatively thin, but in the case of a thick film sheet 10b, the film sheet 10b cannot be bent to the pinch roller 35 portion. Therefore, thick film sheet 10b
In this case, if the pinch roller 35 is positioned above the roller 33 as shown in FIG. 4 (c), the film sheet 10b is conveyed from the measuring section 31 in a substantially parallel natural state without being forcibly bent. be able to.

[Problems to be Solved by the Invention] However, in order to position the pinch roller 35 above the roller 33 and to space the pinch roller 35 from the roller 33 with the changeover switch 40 in the same manner, It caused such problems.

First, the biasing direction of the pinch roller 35 with respect to the roller 33 is different, and the position of the tension spring 38 must be changed.

Therefore, the shaft 39 must be provided with a new pin hole 39c, but the work of providing the second pin hole 36c on one shaft is difficult.

Further, in order to use the changeover switch 40 as before, the positional relationship between the lever piece 37 and the protrusion 40a must be changed.

Therefore, on the rear surface of the panel 30, it is necessary to disassemble and reassemble all parts of the feeding mechanism, which is troublesome.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a film sheet feeding mechanism that can easily change the position of a pinch roller with respect to a roller even if the thickness of the film sheet is different. I am trying.

[Means for Solving the Problems] In order to achieve the above object, the film sheet feeding mechanism of the present invention is provided in a film thickness measuring device for measuring the thickness of the film sheet, and conveys the film sheet. In a film sheet feeding mechanism in which the contact position of a pinch roller is changed with respect to a roller that rotates according to the thickness of the film sheet, a pinch roller (6) is supported by a shaft (4) and the shaft. A power lock mechanism section (17) that can be fixed at a desired rotation angle and that can change the contact position of the pinch roller with respect to the roller, and a power lock mechanism section that is provided in the power lock mechanism section and that controls the contact position of the pinch roller with the roller. The urging direction is changed in response to the change, and in any case, the spring member (15) for urging the pinch roller toward the roller is provided. It is set to.

[Operation] Although the position of the pinch roller provided opposite to the roller is different between when the thin film sheet and the thick film sheet are used, the power lock mechanism unit 17 causes the spring member 15 to rotate at an arbitrary angular position with respect to the shaft 4. Because it can give the urging force of
Even if the position of the pinch roller is changed, the pinch roller can be easily urged toward the roller by operating the power lock mechanism section 17.

[Embodiment] FIG. 1 (a) is a rear view of the film sheet feeding mechanism according to the present invention as viewed from the back side of the panel, and FIG. 1 (b) is a side sectional view of the mechanism.

The panel 2 is provided with a rotatable shaft 4 penetrating from the front surface to the back surface. The shaft 4 is rotatable inside a housing 5 fixed to the panel 2, and one end 4a of the shaft 4 is fixed to one end of a rotating arm 8 which rotatably holds a pinch roller 6. The pinch roller 6 conveys the film sheet 10a in the A direction as the roller 12 rotates. Here, the film sheet 10a is relatively thin.

At the other end 4b of the shaft 4, the stopper boss 13a of the stopper plate 13 is provided.
Has been inserted. The stopper plate 13 is formed in a flat plate shape and has a tip portion 13b rotatable about the shaft 4.

A protrusion 13c is provided at the center of the stopper plate 13,
One end 15a of the torsion spring 15 as a spring member is locked. The torsion spring 15 has a torsion portion 15b inserted through the shaft 4, and the other end portion 15c inserted and locked in an insertion hole 5a provided in the housing 5. The housing 5 is provided with two insertion holes 5a and 5b around the shaft 4.

The other end 15c of the torsion spring 15 is fixed, and the one end 15a is locked to one side surface of the protrusion 13c.
It has a biasing force to rotate in the direction.

The stopper plate 13 is fixed to the shaft 4 by the power lock mechanism section 17.

The power lock mechanism portion 17 is shown in an enlarged side sectional view of FIG. Inside the boss 13a of the stopper plate 13, a male portion 20 and a female portion 21 are in contact with the outer peripheral portion of the shaft 4 in a wedge-shaped cross section.
Is provided, and the wedge is high on the side of the push plate 19 provided adjacent to the wedge, and inclines low according to the inside. The push plate 19 has a male part 20.
It has a pressing ring 19a that contacts the side of the boss, and is fixed to the boss 13a with three clamp bolts 23.

As a result, as shown in FIG. 1 (b), the pinch roller 6
The power lock mechanism 17 is locked in a state in which the pinch roller 6 is in contact with the roller 12, and the stopper plate 13 and the shaft 4 are fixed, so that the pinch roller 6 is moved to the roller 12 side by the torsion spring 15 toward the roller 12 side.
A biasing force in the direction can be obtained.

The power lock mechanism portion 17 can fix the stopper plate 13 and the shaft 4 at any position on the entire circumference of the shaft 4.

In addition, the ball plunger 14 is attached to the tip portion 13b of the stopper plate 13.
Is provided on the panel 2 side, and a receiving groove 25a for positioning the ball plunger 14 and a relief groove 25b, 2 which is formed with a diameter larger than that of the ball plunger 14 and is formed around the receiving groove 25a.
An angle 25 with 5c is provided.

Therefore, the power lock 17 causes the shaft 4 and the stopper plate 13 to
When fixing and, as shown in Fig. 1 (a), the stopper plate 13
The ball plunger 14 is placed in the escape groove 25b, which is retracted from the receiving groove 25a, so as to be free to move.
As a result, when the pinch roller 6 portion (strictly speaking, the rotating arm 8 portion) is operated and separated from the roller 12, the stopper plate 13
The ball plunger 14 is locked in the receiving groove 25a, the pinch roller 6 can be kept at a predetermined distance from the roller 12, and the film sheet 10a can be easily attached.

Next, the case of using the relatively thick film 10b will be described.

In this case, as shown in FIG. 3, the following two operations need only be performed.

First, the states of both ends of the torsion spring 15 are changed. That is,
The other end portion 15c is inserted and fixed in the insertion hole 5b, and the one end portion 15a is locked to the other side surface side of the protrusion 13c in the opposite manner to the former. Then, the stopper plate 13 is fixed to the shaft 4 by the power lock mechanism portion 17.

As a result, both the stopper plate 13 and the pinch roller 6 are urged to rotate in the C direction.

Next, as shown in FIG. 3, the stopper plate 13 and the shaft 4 are fixed by the power lock mechanism 17 with the ball plunger 14 positioned in the escape groove 25c. In this state, the pinch roller 6 is constantly urged toward the roller 12 and the thick film roller
It is possible to convey the 10b without forcibly bending it.

In addition, when the rotating arm 8 is operated to separate from the roller 12,
The ball plunger 14 of the stopper plate 13 is locked in the receiving groove 25a, the pinch roller 6 can be kept at a predetermined distance from the roller 12, and the film sheet 10b can be easily attached.

[Advantage of the Invention] According to the present invention, the power lock mechanism can be fixed at a predetermined angle with respect to the shaft that pivotally supports the pinch roller, and the angle between the shaft and the power lock mechanism is changed in the spring member. Also,
Correspondingly, since the pinch roller is biased to the roller, the pinch roller is always biased to the roller even if the contact position of the pinch roller to the roller is changed due to the change of the thickness of the film sheet. The film sheet can be conveyed.

Further, the operation of changing the contact position of the pinch roller can be easily and promptly handled by simply changing the positions of the power lock mechanism portion and the spring member having the already provided structure.

[Brief description of drawings]

FIG. 1 (a) is a rear view of the film sheet feeding mechanism according to the present invention viewed from the back side of the panel, FIG. 1 (b) is a side sectional view of the same, and FIG. 2 is a power lock mechanism portion. FIG. 3 is an enlarged side sectional view, FIG. 3 is a back view of the feeding mechanism when the thickness of the film sheet is changed, viewed from the back side of the panel, and FIG. 4 (a) is a conventional film sheet feeding mechanism. The front view shown in FIG. 4 (b) is a partially enlarged top view of the same mechanism.
FIG. 6C is a front view showing the feeding mechanism when the thickness of the film sheet is changed. 2 ... Panel, 4 ... Axis, 5a, 5b ... Insertion hole, 6 ... Pinch roller, 8 ... Rotating arm, 10a ... Thin film sheet, 10b ... Thick film sheet, 12 ... Roller, 1
3 …… Stopper plate, 13a …… Boss, 13c …… Projection, 15 ……
Spring member, 15a ... one end, 15c ... other end, 17 ... power lock mechanism, 19 ... push plate, 23 ... clamp bolt.

Claims (1)

[Scope of utility model registration request] 1. A film thickness measuring device for measuring the thickness of a film sheet, which conveys the film sheet and changes a contact position of a pinch roller with respect to a roller which rotates according to the thickness of the film sheet. In the film sheet feeding mechanism described above, the pinch roller (6) can be fixed to a shaft (4) on which the pinch roller (6) is supported at a desired rotation angle with respect to the shaft, and the contact position of the pinch roller with respect to the roller can be changed. A flexible power lock mechanism part (17) and a biasing direction provided in the power lock mechanism part, the biasing direction being changed corresponding to the change of the contact position of the pinch roller with respect to the roller. A film sheet feeding mechanism comprising: a spring member (15) for urging the roller toward the roller.