JPS6031146B2 - Sheet winding and unwinding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for winding a sheet around a drum circumferential surface and for removing the sheet from the drum circumferential surface.

To wrap a sheet around the drum while it is stationary, or to remove a sheet, open and close the sheet pressing plate embedded in the drum's circumferential surface, and squeeze and lever the sheet around the drum's circumference. It is necessary to bring the sheet into close contact with the drum surface, and when removing the sheet from the peripheral surface of the drum, it is necessary to pull out one end of the sheet from under the press plate to facilitate the removal operation.

A part of the circumferential surface of the drum is covered with a cover that can be opened and closed, and the sheet can be attached or removed manually by opening and closing this cover. opening/closing and squeezing the seat,
Alternatively, it is desirable that a sheet peeling action be provided to remove the sheet from the drum circumferential surface. An object of the present invention is to provide an apparatus in which the above-mentioned operations are automatically performed by opening and closing a cover, and the sheet can be easily attached to and detached from the drum circumferential surface by manual operation. be. The present invention will be explained below with reference to the illustrated embodiments.

FIG. 1 shows a schematic diagram of a facsimile machine, in which a drum 1 rotating in the direction of the arrow is pivotally connected to a stationary member by a main shaft 2, and a heart cam 3 fixed to one end of the shaft 2 and a removable drum 1 attached thereto. The trochanter 4 allows the drum to be stopped at a predetermined position. The upper part of the drum is covered with a cover 6 that can be opened and closed about a shaft 5, and a pressing plate 7 embedded in the peripheral surface of the drum clamps each end of a sheet 9 inserted from a guide plate 8. . The squeezing member 11 squeezes the sheet 9 when it is wound around the drum circumferential surface, and the friction member 12 presses against the drum circumferential surface and presses downward when the sheet 9 is removed from the drum circumferential surface. Pressing plate 7 presses one end of sheet 9 that has been slid and released.
It is pulled out from below. The recording needle 13 and the reading head 14 move parallel to the drum to record on recording paper and read documents, and are controlled by a control device 15, respectively. In FIGS. 2 and 3, a chevron-shaped support member 21 is disposed in a long hole 1a bored along the generatrix of the drum, and a relatively thin pressing member 7 fixed on the top of the support member 21 is The step portions lb and lc provided along the elongated hole 1a are supported respectively.

As shown in FIG. 3, two chest members 22 are fixed to the leg portions of the support member 21, and one arm portion 22a and the main shaft 2
Each end of a compressible spring 24 is latched to a fixture 23 fixed to the mount 23, which presses the pressing plate 7 against the drum surface. The driven member 25, which has a cam portion 25a at its free end, is connected to a side plate (not shown) by a shaft 26.
A leaf spring 27, whose base is fixed to a stationary member, is in pressure contact with the upper right edge thereof. A pair of support plates 31 to which the cover 6 is fixed are fixed to both side plates by means of a wheel 5, and a shaft 34 fixed to the support plates 31 is rotated by the leaf spring when the cover 6 is opened. It is in a position where it can press the top surface of 27.

A pair of support members 3 constituting the squeezing means are attached to the shaft 5.
5 is pivotally mounted, and a squeezing member 11 serving as a squeezing means is rotatably attached to the end of one arm, and this squeezing member 11 is locked at one end to the shaft 5 and at the other end to the support member 36. The elasticity of the torsion spring 36 gives it a tendency to spread in the direction of pressing against the circumferential surface of the drum. The support member 2
Each end of 1 is formed slightly longer in the circumferential direction of the drum, and is embedded in each step provided at the peripheral end of the drum, and protrudes toward the inside of the drum on the outside. A pin 37 that can be engaged with a locking member provided on a support member 35 of an ironing means, which will be described later, is fixed to the bent piece 21a, which is the formed protrusion.

As shown in FIG. 7, the base of a locking member 38, which is a member for releasing the squeezing member 11 from pressing against the drum peripheral surface, is pivotally attached to the arm 35a of the support member 35 by a shaft 40. A stopper 39 fixed to the supporting portion village 35 and the locking portion village 3
The locking member 38 is in pressure contact with the stopper 39 due to the elasticity of the torsion spring 41 that is locked to each of the locking members 8 and 8 . The pin 38 cooperates with the locking member 37 to release the squeezing member 11, as will be described later, and the pin 42 provided at the free end of the support member 35 is designed to release the squeezing member 11. When the squeezing member 11 comes into pressure contact with the circumferential surface of the drum, when it comes into pressure contact with the circumferential surface of the bent green rim of the clamping means, the bending green rim of the clamping means increases. The bent piece 21a extends into the rotation path and cooperates with the lower edge of the bent piece 21a to increase the squeezing action. A support member 43 is further pivotally connected to the shaft 26 of the driven member 25, and a shaft 44 is fixed to the free end thereof.
includes a paper ejection lever 4 having a friction member 12 fixed to its free end.
The base portion 45a of No. 5 is pivotally attached.

The paper ejection lever 45 is moved clockwise in FIG. The friction member 12 is given a rotational habit, and by bringing the upper side twill part of the locking plate 46 into pressure contact with the stopper 49, the friction member 12
is normally located at a distance from the drum circumference. The drum 1 is stopped at a predetermined position shown in FIG. 3 by a stopping mechanism consisting of a heart cam 3 and a trochanter. In this state, when the cover 6 is opened as shown in FIG. Pressing the driven member 25 via the spring 27
Rotate clockwise.

As a result, the one arm portion 22b of the two arm member 22 is attached to the cam green 25a.
As shown in FIG. 4, the support member 21 is
It rotates clockwise around the right green end, and the green portion on one side of the pressing plate 7 is opened. The shaft 34 presses the short arm 43a of the support member 43 to spread the material 43 counterclockwise. At this time, the locking plate 46 comes off the stopper 49, so the friction member 12 slides in the circumferential direction while being in pressure contact with the drum peripheral surface, and if the sheet 9 is already clamped to the drum peripheral surface, It functions to pull out the end portion from under the pressing plate 7. Thereafter, as shown in FIG. 4, the lower edge of the locking plate 46 abuts against the abutting member 51 fixed to the immovable member and rotates counterclockwise, so that the friction member 12 is again moved around the drum. move away from the surface. Paper is fed to the drum by inserting the leading edge of the sheet 9 into the inside of the pressing plate 7 as shown in FIG. As shown in FIG. 3, the support member 35 of the squeezing member 11 is prevented from rotating by pressing its leg portion 35a against the stepped portion 27a of the plate spring 27 (see FIG. 2), and the squeezing member 11 is held at a retracted position away from the drum circumferential surface. When the cover 6 is opened, the shaft 34 releases the leaf spring 27 downward, so that the leg portion 35a separates from the stepped portion 27a of the leaf spring 27, and the support member 35 moves in the anti-Japanese temple direction as shown in FIG. The squeezing member 11 is brought into pressure contact with the circumferential surface of the drum. When the cover 6 is closed in this state, the support member 25 and the support member 43
rotates back, and the green portion on one side of the pressing plate 7 closes to clamp the tip of the sheet 9, and the friction member 12 is also held at its original position as shown in FIG.

Next, when the drum 1 is rotated by operating the start metal 0 (not shown), the sheet 9 is wrapped around the drum circumferential surface as shown in FIG. be closely followed. When the squeezing member 11 is in pressure contact with the drum circumferential surface, the pin 4 of the support member 35
2 is located within the rotation path of the bent piece 21a of the support portion village 21. When the drum rotates approximately once, the bending piece 21a
The lower green of the seat rides on the pin 42 as shown in FIG. 6, and the support member 21 rotates in the anti-Japanese direction around the left side twill as shown in FIG. Pressing plate 7
Open the side twill. When the pressing plate 7 presses the rear end of the sheet 9, the loosening of the sheet 9 between the squeezing member 11 and the pressing plate 7 causes a hood to loosen in the winding of the sheet 7 around the drum circumferential surface. However, the bent piece 21
As shown in FIG. 6, by riding on the pin 42 and pressing it downward by the biasing behavior of the bent piece 21a, the squeezing member 11 has an even stronger squeezing action when it approaches the rear end of the sheet. Sheet 9 by being strengthened
It is always in close contact with the drum circumference. Closing of the press plate 7 is as follows:
As shown in FIG. 8, the bending piece 21a passes over the bottle 42 and comes off from it.

When the bent piece 21a is rotated a little more from this state, the pin 37 of the bent piece 21a engages with the free end of the locking member 38 in a press-contact state as shown in FIG. 8, and rotates it counterclockwise. As the rotation progresses and the pin 37 bites into the notch of the locking member 38, the locking member 38 raises the support member 35,
The member 35 is rotated clockwise as shown in FIG. As a result, the leg portion 35a is again engaged with the step portion 27a of the leaf spring 27, as shown in FIG. It is held in the retracted position. When the pin 37 is further rotated from the position shown in FIG.
Return to the original position shown in the figure. According to the present invention, when the cover is opened, a mechanism that is linked to the opening of the cover automatically releases the pressing plate, presses the squeezing member against the circumferential surface of the drum, releases the pressing member, and peels the sheet from the cylindrical surface of the drum. The sheets can be easily attached to and removed from the drum by manual operation.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a facsimile machine, FIG. 2 is a perspective view of a sheet winding and detaching device showing an embodiment of the present invention, FIG. 3 is a front view of the main parts of the device, and FIGS. FIG. 9 is an operational view of the mechanism in FIG. 3. 1...Drum, 6...Cover, 7...
...Press plate, 9...Sheet, 11...
・・・Strong member, 12...Friction member. I don't like it, I don't like it, I don't like it, I don't like it, I don't like it, I don't like it, I don't like it, I don't like it, I don't like it, I don't like it, I don't like it, I don't like it. figure

Claims (1)

[Claims] 1. A cover that covers a part of the drum around which the sheet is wound and is opened and closed while the drum is stationary; a pressing plate that is rotatable together with the drum and has the habit of being buried along its circumferential surface; a protruding portion protruding inward of the drum, a means for clamping the end of the sheet in conjunction with the opening/closing operation of the cover, and a habit of coming into pressure contact with the circumferential surface of the drum; A squeezing member that is normally separated from the circumferential surface of the drum and comes into pressure contact with the circumferential surface of the drum in conjunction with the opening/closing operation of the cover; Pressure contact between an arm portion that projects into the movement path and an ironing member that engages with the protrusion to separate the ironing member from the drum circumferential surface when the arm portion is located in the rotation path. and a means for peeling the sheet from the drum circumferential surface by moving a friction member separated from the drum circumferential surface toward, away from, and sliding in conjunction with the opening/closing operation of the cover. and when the drum completes one revolution with the cover closed and the pressing plate of the clamping means and the straining member of the straining means buried and pressed into the circumferential surface of the drum, the arm portion of the straining means When the protrusion of the clamping means rides on the clamping means, the pressing force of the squeezing member against the circumferential surface of the drum is strengthened through the urging of the clamping means, and the rotation of the drum causes the protrusion of the clamping means to ride on the clamping means. When the press plate of the clamping means is buried in the circumferential surface of the drum when it passes the arm of the said squeezing means and comes off, and the protruding part of the clamping means engages with the pressure release part of the said squeezing means. A sheet winding and unwinding device, characterized in that the pressing member of the straining means is separated from the circumferential surface of the drum by lifting the pressure releasing part as the drum rotates.