JPS622117Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a base paper fixing and holding mechanism in a mimeograph paper making machine, and more specifically, it is capable of reliably fixing and holding both ends of the base paper to the rotating drum when the base paper is mounted on the rotating drum. The present invention relates to a base paper fixing and holding mechanism constructed as described above.

A conventional base paper fixing and holding mechanism is as shown in FIG. 1, where A shows the state before the base paper is attached, and B shows the state after the base paper is attached. In order to load the base paper onto the drum in such a mechanism, both ends of the base paper (not shown) are inserted into the slots 6 provided in the rotating drum a, and then a presser bar c, which is configured to be detachable, is inserted.
to hold both ends of the base paper fixedly, and then rotate a ring d, which is attached to both ends of the rotating drum a so as to rotate by a predetermined angle, until the notch e of the ring d deviates from the presser bar c. This is done by In this mechanism, the presser bar c is simply pressed down from the outside by the ring d, so as the rotation of the drum increases, the presser bar c and the ring d There was a drawback that both ends of the base paper tended to come off the drum during plate-making due to looseness between the plates.
Furthermore, there is also a drawback that situations such as the presser bar c being dropped into the inside of the machine when it is attached or detached, or situations in which the presser bar c is removed and left behind occur frequently, and it has been desired to improve these drawbacks.

The present invention has been devised to eliminate all the drawbacks of the conventional mechanism, and will be explained in more detail below with reference to the illustrated embodiments.

FIG. 2 is a perspective view of the base paper fixing and holding mechanism according to the present invention, FIG. 3 is a sectional view taken along the line - in FIG. 2, and FIGS. The figure is a partial sectional view taken along line - in Figure 2, Figure 5 is a sectional view taken along line - in Figure 4, and Figure 6 is a partial sectional view taken along line - in Figure 2. It is. FIG. 7 is a sectional view taken along the line - in FIG. 6.

In the figure, 1 is a rotating drum, and slots 2 are provided in the length direction. Reference numerals 3 and 3 denote rings for preventing the presser bar described later from falling off, which are fixed to both ends of the drum 1, and the thickness of the portion 3' corresponding to the presser bar is reduced so that the presser bar can be attached to the rotating drum by a required distance l. It is movable toward the center, and is provided with a notch 4 for inserting a finger or the like for removing the leaf spring described later. Reference numeral 5 designates a press bar for the base paper, and numerals 6 and 6 designate base plates that sandwich and hold the base paper between the press bar 5 and the base paper. Further, the base plates 6, 6 are provided so as to be slidable within the slot 2 of the rotary drum 1 by a required distance in the direction in which they come into contact with the presser bar 5. Reference numeral 7 denotes pressure expansion springs for constantly pressing and urging the presser bar 5 outward via the piston rod 8, and is disposed at both ends of the rotating drum 1. Reference numerals 9 and 9 denote pressure expansion springs for constantly pressing and urging the base plates 6 and 6 outward via the piston rods 10 and 10, and are disposed at both ends of the rotating drum 1. In this embodiment, the expansion springs 7, 9, and 9 are assembled together in the T-shaped member 11, but they may be provided separately, and the design can be changed as appropriate. Reference numeral 12 denotes a spring plate whose base portion is fixed to both ends of the rotating drum 1 and whose tip portion is bent inward into a hook shape, and is used to hook both ends of the presser bar 5.

However, the mode of operation of the present invention having the above configuration will be explained below with reference to FIGS. 4 to 7.
First, in the state shown in FIGS. 6 and 7, both ends of the base paper (not shown) are inserted into the slot 2 of the rotating drum 1, more precisely between the base plates 6, 6 and the presser bar 5, and then the presser bar is When the spring plate 5 is pressed inward against the spring 7, both ends of the spring plate 12 slide into the hook-shaped tip portion of the spring plate 12. For this reason, the spring plate 12
is temporarily pushed outward, but the presser bar 5
The moment the bar 5 passes beyond the hook-shaped portion at its tip, it returns to its original state, and the presser bar 5 is therefore latched by the hook-shaped portion of the spring plate 12. (See Figure 4). Since it is configured in this way, the presser bar 5 is moved against the spring plate 1 by the action of the spring 7.
It is pressed into contact with the hook-shaped portion of No. 2, and is reliably prevented from wobbling in the inward and outward directions. At that time, the base plates 6, 6 are also pushed outward by the action of the springs 9, 9.
Both ends of the base paper inserted between the presser bar 5 and the base plates 6, 6 are more reliably held under clamping pressure. Therefore, even if the rotational speed of the rotating drum increases as in the conventional case, there is no risk that both ends of the base paper will come off the rotating drum.
(see Figures and Figure 5). Further, when removing the base paper from the drum after the plate making is completed, all that is required is to insert a finger or the like into the notch 4 of the ring 3 and shift the hook-shaped portion of the tip of the spring plate 12 outward, thereby releasing the presser bar 5. is lifted by a distance l (see FIGS. 6 and 7) until it comes into contact with the thin part 3' of the ring 3 by the action of the spring 7, and releases the holding of the original paper. At this time, the outer ends of the base plates 6, 6 are also pushed out to the circumferential surface of the rotary drum 1 by the action of the springs 9, 9, making it easier to remove the base paper.

Since the present invention has the above-described structure and function, both ends of the base paper can be securely fixed to the rotating drum, and therefore even if the rotating drum rotates at high speed,
There is no risk of the base paper coming off the rotating drum. Furthermore, since both ends of the presser bar are held by rings so that they do not fall off, there is no risk of the presser bar being dropped inside the machine or being left behind when it is attached or detached, unlike conventional methods, and it can be put to practical use and benefitted. There are many things.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional base paper fixing and holding mechanism, FIG. 2 is a perspective view of a base paper fixing and holding mechanism according to the present invention,
Figure 3 is a sectional view taken along the - line in Figure 2;
4 to 7 are explanatory diagrams of the mode of operation; FIG. 4 is a partial sectional view taken along the line ``-'' in FIG. 2, and FIG. 5 is a sectional view taken along the line ``-'' in FIG. 4. , FIG. 6 is a partial sectional view taken along the line - in FIG. 2, and FIG. 7 is a sectional view taken along the line - in FIG. 6. 1: Drum, 2: Slot, 3,3: Ring, 5:
Holding bar, 6, 6: Base plate, 7: Expansion spring, 9,
9: Expansion spring, 12: Spring plate.

Claims (1)

[Scope of utility model registration request] A presser bar for the base paper is biased outward from the center of the rotating drum by a spring, and a base plate that clamps both ends of the base paper between the presser bar and the base plate is slidably provided in a slot in the rotary drum. At the same time, spring plates are provided at both ends of the rotating drum, which are biased outward from the center of the rotating drum by a spring, and whose tips are bent inward into a hook shape to hook both ends of the presser bar. A base paper fixing and holding mechanism in a mimeograph paper plate making machine, wherein a ring fixed to both ends of a rotating drum is made thinner at a portion corresponding to the presser bar, and a notch is provided at the portion.