JPH0423660Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention Industrial field of application The invention is a platen device used in Japanese typewriters, and in particular, it is a platen device that allows printing paper to be loaded and removed from the platen with extremely simple operations. The present invention relates to a platen device for a Japanese typewriter which can be easily assembled.

BACKGROUND ART Conventionally, as shown in Figure 5, a pair of legs B are provided below an upper paper presser lever A, and the legs B are inserted into a pair of guide holes D drilled in a platen C. After that, the leg B is engaged with a rod H that is placed between the side plates E and F of the platen C so that it can be temporarily moved to a position by operating the operating rod G, and A compression spring J is provided between the rod H and the inner surface I of the platen C, and the upper paper presser rod A is moved up and down with respect to the platen C through the rod H by operation of the operating rod G. At the same time, a ring L is mounted on one end K of the platen C so as to be able to rotate.
One end N of the lower paper presser rod M, which is curved upward so as to have an elastic force, is provided so that it can be raised and lowered by a hinge O, and the other end P is connected to the other end Q of the platen C. A ring S for holding down the lower paper, which has a plurality of notches R suspended so as to be able to rotate with a slight gap left above, is placed on the platen C against the elastic force at the part without the notches R. A platen device for a Japanese typewriter is generally known and is configured to press the printing paper T onto the platen C using the upper paper presser lever A and the lower paper presser M. It is provided.

Problems to be Solved by the Invention The above-mentioned conventional device is particularly complicated in its upper paper presser rod A and its attachment and operating mechanism, and not only has a large number of parts, but also requires complicated assembly work. It was hot.

The present invention provides a platen device for a Japanese typewriter that can solve the above-mentioned conventional problems.

Means for Solving the Problems in the Structure of the Invention To be described in detail with reference to the embodiment of the drawings, 1 is a platen 2 on the left side of the platen 1, 3 is on the right side of the platen 1, and 4 is on the left side plate 2 and the right side plate 3. A platen shaft 4 is fixedly provided, and the platen 1 can be rotated via the platen shaft 4.

All of the above are similar to known ones. Reference numeral 5 denotes an upper paper presser rod which is formed by bending a rod approximately as long as the width of the platen 1 in an upwardly curved manner so as to have an elastic force, and a non-slip material such as felt 6 is provided on the underside of the rod. It is attached integrally. Reference numeral 7 designates a mounting rod for the upper paper presser rod 5, and this mounting rod has a hole 8 drilled at one end thereof to fit onto the boss 3' of the right side plate 3 of the platen 1, and a hole 8 near the other end. The screw 10 inserted into the mounting hole 9 drilled in the
Screw it into the screw hole 10' of the right side plate 3 of the platen 1 and attach it to the right side plate 3 of the platen 1 (therefore, the platen 1
2) In addition to being integrally fixed, one end of the upper paper presser rod 5 (the right end in Figures 1 and 4) is suspended from the other end via a hinge 11, and the upper paper presser A rod 5 is provided on the surface of the platen 1 so that it can be raised and lowered up and down about the hinge 11. Reference numeral 12 denotes a lower paper presser rod, which is formed by bending a rod approximately as long as the width of the platen 1 in an upwardly curved manner so as to have elasticity, and a non-slip material such as felt 13 is provided on the underside of the rod. are attached integrally. 14 is a mounting rod for the lower paper presser rod 12, and this mounting rod has a mounting hole 15 bored in one end thereof.
Attach the collar 1 to the outside of the mounting rod 7 of the upper paper presser rod 5.
6, the lower paper presser rod 12 is rotatably suspended on the boss 3' of the right side plate 3 of the platen 1, and the lower paper presser rod 12 is attached to the other end via a hinge 17. One end (right end in Figures 1 and 4)
so that the lower paper presser rod 5 can be raised and lowered up and down on the surface of the platen 1 centering on the hinge 17, and can also be moved along the circumference of the platen 1. It is provided. In addition, a stopper 18 is fitted onto the platen shaft 4 on the outside of the mounting rod 14 (on the right side in FIGS. 1 and 4) and screwed 19 to secure the mounting rod 14 and the lower paper presser rod 12 to the platen 1. Therefore, in FIGS. 1 and 4, it is prevented from falling off to the right. 20 is the upper paper presser rod 5
, and 21 are holding metal fittings for each of the lower paper holding rods 12, one end of which has mounting holes 22 and 23, respectively, and the other end of each of which has an approximately shaped cross section. The holding parts 24 and 25 each having a knurling for operation on the upper surface thereof are bent to the right in FIGS. , the respective mounting holes 22 and 23 are connected to the left side plate 2 of the platen 1.
via a collar 26 between each on the boss 2' of the
The holding parts 24 and 25 can be moved along the circumference of the platen 1 by leaving a slight gap between the holding parts 24 and 25 and the surface of the platen 1, so that the holding parts 24 and 25 can be freely rotated. These presser fittings 20 and 21 are provided respectively so as to be able to do so. A gear 27 for feeding the platen 1 is fitted onto the platen shaft 4 on the outside of the presser metal fitting 21 (on the left side in FIGS. 1 and 4) and is secured with a screw 28.
and 21 are designed to prevent them from falling off from the platen 1 to the left in FIGS. 1 and 4, respectively. When the other ends 5' and 12' of the upper paper presser rod 5 and the lower paper presser rod 12 are respectively engaged with the pressers 24 and 25 against their respective elastic forces, The upper paper presser rod 5 and the lower paper presser rod 12 are attached to each felt 6.
and 13, so that they can be brought into pressure contact with the surface of the platen 1, respectively.

Operation Since the device of the present invention has the above-mentioned configuration, when the other end 5' of the upper paper presser rod 5 is pressed down toward the surface of the platen 1 against its elastic force, the presser metal 24 slightly and press the holding part 2 of the metal fitting.
4' and the other end 5', swing the upper paper presser rod 5 slightly upwards, and then press down the rod while pressing the felt 6 on its lower surface and the surface of the platen 1. By rotating the presser metal fitting 24 while holding the upper end 29' of the printing paper 29 between them, and engaging the presser metal fitting 24' with the other end 5' of the upper paper presser rod 5, The upper end 29' of the printing paper 29 can be completely mounted on the surface of the platen 1. Next, the platen 1 is rotated in the winding direction of the printing paper 29 according to the size of the printing paper 29, and the engagement between the presser metal fitting 21 and the lower paper presser rod 12 is released, and the presser metal fitting 21 is disengaged from the lower paper presser rod 12. and the lower paper presser rod 12, respectively, and rotate the presser metal fitting 21 with the lower end 29'' of the printing paper being sandwiched between the bottom felt 13 of the lower paper presser rod 12 and the surface of the platen 1. By moving the presser portion 25 and engaging the other end portion 12' of the lower paper presser rod 12, the printing paper 29 can be reliably attached to the surface of the platen 1.

Further, in order to load and unload the printing paper 29 from the platen 1, the operations described above can be reversed.

Effects As mentioned above, in the present device, the upper paper presser of the printing paper is extremely simple, consisting of an upper paper presser lever with the same structure as the conventional lower paper presser lever, and a presser metal fitting that presses this upper paper presser lever. This can now be done with configuration.

And, even though this presser metal fitting for the upper paper presser lever is provided so that the side plate of the platen can rotate in the same way as the presser metal fitting for the lower paper presser rod in the past, the presser metal fitting for the lower paper presser rod is By providing the presser metal fitting for the upper paper presser rod so as to rotate separately from the presser metal fitting for the upper paper presser rod, the device itself does not become complicated, and the rotation of the lower paper presser rod with respect to the platen and the rotation of the lower paper presser rod against the platen can be easily controlled. It was possible to perform pressure welding reliably as before.

In addition, since the upper paper presser rod has the same shape as the lower paper presser rod, it is not only suitable for mass production, but also allows each part to be easily assembled from both sides of the platen 1 during assembly work. The practical effects of its use are extremely large, such as reducing the overall production cost.

In the above-mentioned embodiment, mainly the platen 1
An upper paper presser rod 5 is attached to the right side plate 3 and its boss 3',
The configuration in which the mounting rod 7, the lower paper presser rod 12, and the mounting rod 14 are provided with the presser metal fittings 20 and 21 on the boss 2' of the left side plate 2 of the platen 1 has been described in detail. This can be implemented in the same manner as described above even if the configuration is provided in opposite positions on the right and left sides.

[Brief explanation of the drawing]

Figures 1 to 4 are examples of the present invention.
The figure is a front view, Fig. 2 is a right sectional view, Fig. 3 is a left sectional view, Fig. 4 is a partial perspective view with a part cut away, and Fig. 5 is a partially cut away view of a conventional device. FIG. 1...Platen, 2...Left side plate of platen 1,
3... Right side plate of platen 1, 4... Platen shaft,
5...Top paper presser rod, 7...Mounting rod for upper paper presser rod 5, 12...Lower paper presser rod, 14...Lower paper presser rod 1
2 mounting rod, 20... upper paper presser rod 5 presser fitting,
21... Presser metal fitting for lower paper presser rod 12.

Claims (1)

[Claims for Utility Model Registration] An upper paper presser rod 5 whose one end is suspended over the side plate 3 of the platen 1 so that it can be raised and lowered on the surface of the platen 1, and which is curved upward; A lower paper presser rod 12 whose one end is hung on the surface of the platen 1 so as to be able to be raised and lowered over a mounting rod 14 which is hung so as to be able to rotate, and which is curved upward; One end is rotatably mounted on the side plate 2 of the platen 1, and the other end is engaged with the other end 5' of the upper paper presser rod 5, and the upper paper presser rod 5 is attached to the platen 1.
a presser metal fitting 20 for the upper paper presser rod, which is provided with a presser portion 24 that is brought into pressure contact with the upper paper presser rod; and one end of the presser metal fitting 20 for the upper paper presser rod is mounted on the side plate 2 of the platen 1 so as to be able to rotate separately from the presser metal fitting 20 for the upper paper presser rod. and a presser fitting 21 for the lower paper presser rod, which has a presser part 25 at the other end that engages with the other end 12' of the lower paper presser rod 12 and presses the lower paper presser rod 12 against the platen 1. A platen device in a Japanese typewriter characterized by the following: