JPS61141578A - Paper-supplying device - Google Patents

Abstract

PURPOSE:To reduce the number of component parts of the titled device and contrive reductions in size and weight, by a construction wherein a support member is turned with a through-hole provided in a machine frame as a fulcrum, and the support member is depressed downward directly by a paper pressing releasing lever. CONSTITUTION:A printing paper 10 is inserted through an inserting part 12c, and is wound around a platen 1. When the paper 10 is wound in a distorted state, the paper pressing releasing lever 6 is rotated in the direction of an arrow A, whereby a pressure part 13d is pushed by a cam part 6b, and is turned in the direction of an arrow B. With the support member 13 turned, a paper- pressing roller 11 is depressed downward in the vertical direction through a guide member 12, and the paper clamped between the platen 1 and the roller 11 is released, whereby the distortion of the paper can be corrected. Accordingly, since the support member 13 is pushed directly by the lever 6, there is no need for a pair of holding members for clamping the roller 11 or a crank-type shaft member for releasing the paper.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a paper feeding device such as a typewriter having a cylindrical platen.

Conventional technology In recent years, printing devices such as typewriters, like other devices, have tended to be smaller and lighter to make them more portable.In order to be compatible with these printing devices, paper feeding devices must also be smaller and lighter. It is necessary to advance the development of paper feeders. Below, conventional paper feeding devices will be explained.

The printing paper wrapped around the platen is pressed against it by a paper presser roller, and the printing paper is fed by rotating the platen. To adjust the position of the printing paper, the paper presser roller is moved away from the platen, and the printing paper and the platen are no longer in contact with each other.

As a conventional technique, for example, Japanese Patent Application Laid-Open No. 68-11027
It is shown in No. 8. The paper pressing roller is held between a pair of holding members, and the holding members are supported by a support member. The holding member is guided in vertical movement so as to straddle a shaft member provided in the longitudinal direction of the platen. Furthermore, a crank-shaped shaft member for releasing the paper is provided in the longitudinal direction of the platen, and the crank-shaped shaft member is rotated to push down the support member against the force of the biasing spring.
Separate the paper presser roller from the platen.

Problems to be Solved by the Invention However, in the above configuration, a holding member, a shaft member, and a crank-type shaft member are required, and the shaft receives a large paper pressing force, resulting in a shaft with a large diameter, which reduces the overall size of the device. , which was an impediment to weight reduction.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a paper feeding device that is smaller and lighter overall.

Means for Solving the Problems In order to solve the above problems, the paper feeding device of the present invention includes a platen, a roller that presses and presses the printing paper wound around the platen, and a rotatable pivot for the roller. a guide member for introducing the printing paper along the platen;
a machine frame, a support member that pivotally supports the guide member and is inserted into a through hole drilled in the machine frame and is rotatable about the through hole as a fulcrum; and a support member that is stretched between the machine frame and the support member. an elastic member for applying pressure contact force to the roller via the guide member; and a release member that contacts the support member and pushes down the support member against the biasing force of the elastic member to release the pressure contact of the roller. It is configured to include the following.

Function The present invention has the above configuration, and the guide member holds the roller, and the guide member is pivotally supported on the support member so that the roller appropriately presses the printing paper wound around the platen. The support member is rotatably directly supported by a through hole formed in the machine frame, and the roller presses the printing paper through the guide member due to the biasing force of the elastic member.

The position of the print paper can be adjusted by driving the release member, directly pushing down the support member with the release member, and separating the roller from the print paper.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 shows a perspective view of essential parts of a paper feeding device in an embodiment of the present invention.

1 is the platen, 2 and 3 are the platen shafts, 4 is the machine frame, 6
is the hole for the bearing, and 6 is the paper presser release lever.

Reference numeral 6a denotes a hole provided in the paper presser release lever 6, and the platen shaft 3 is pivotally attached to the bearing hole 6 and the hole 6a (not shown) provided in the machine frame of the platen shaft 29. Frame 4
It is locked in.

Figure 2 is a sectional view of the main parts of the paper feeding device in Figure 1, and Figure 3 is a sectional view of the main parts of the paper feeding device in Figure 1.
FIG. 2 is a perspective view of a typewriter configured with the paper feeding device shown in the figure.

Reference numeral 7 denotes a type wheel in which type is arranged at the tips of a large number of spoke pieces, and 8 a hammer solenoid, which strikes the type from the back of the spoke pieces onto the printing paper 1o via a print ribbon 9 to print. A platen rotation mechanism (not shown) is attached to the leftmost end of the platen shaft 2, and after printing is performed, the platen 1 is rotated as necessary to feed the printing paper 1o.

Reference numeral 11 denotes a paper presser roller, and 12 a guide member to which the paper presser row 211 is rotatably pivotally mounted.A shaft portion 11a of the roller 11 is fitted into a groove portion 12a of the guide member 12.

Reference numeral 13 denotes a support member, which has a protrusion 1 in the slit hole 4a of the machine frame 4.
3a is fitted, and a spring 14 tensioned between the spring hook 4b of the machine frame 4 and the spring hook 13b of the support member 13 biases it vertically upward. A groove portion 13c is provided in the support member 13, and the retaining portion 12b of the guide member 12 is pivotally supported. The support member 13 includes
Furthermore, a suppressing portion 13d is provided, which contacts the cam portion 6b of the paper presser release lever 6, and is pushed down by rotation of the paper presser release lever 6, and the support member 13 rotates about the slit hole portion 4a as a fulcrum.

The operation of the paper feeding device of this embodiment configured as described above will be described below. First, the printing paper 10 is inserted through the insertion portion 12c of the guide member 12 and wound around the platen 1. At this time, if the printing paper 10 is twisted and twisted, when the paper presser release lever 6 is rotated in the direction of the arrow, the pressing part 13d of the support member 13 is pushed by the cam part 6b and rotates in the direction of the arrow B. do. When the support member 13 rotates, the paper presser roller 11 is pushed vertically downward via the guide member 12. In this state, the platen 1 and the paper presser roller 511
The printing paper that was held between the
You can freely correct distortions in printed paper.

After correcting the printing paper 1o, the paper presser release lever 6 is rotated in the direction opposite to the arrow A, and the paper presser roller 11 presses the printing paper 10 against the platen 1 with the opposite flat head.

As described above, according to this embodiment, the support member 13 is an integral part that pivotally supports the guide member 12 to which the paper presser row 211 is pivotally attached, and the machine frame 4 has a slit hole that serves as a pivot point for the support member 13. Since the support member 13 is directly pushed by the paper press release lever e, compared to the conventional paper feeding device,
There is no need for a pair of holding members that hold the paper pressing roller, and also there is no need for a shaft member that guides the holding members and a crank-type shaft member for releasing the paper. Therefore, the structure is simple, the number of parts is small, and it is possible to achieve a reduction in size and weight.

In this embodiment, the spring 14 is a tension coil spring, but a compression coil spring or a plate spring that urges the bottom surface of the support member 13 upward may be fixed to the machine frame 4.

Effects of the Invention The present invention is configured such that a paper pressing roller is pivotally mounted on a guide member, the guide member is pivotally supported on a support member, and the support member is rotated using a through hole bored in a machine frame as a fulcrum, Furthermore, since the support member is directly pushed down by the paper presser release lever, the number of parts in the paper feeder can be reduced and the paper feeder can be made smaller and lighter, which has the excellent effect of making the entire printing device smaller. is obtained.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of essential parts of a paper feeding device in an embodiment of the present invention, FIG. 2 is a sectional view of essential parts showing some of the components of FIG. 1, and FIG. FIG. 3 is a perspective view of a typewriter configured with the paper feeding device of FIG. 2; 1...Platen, 2, 3...Platen shaft, 4...Machine frame, 6...Bearing hole,
6...Paper presser release lever, 7...Type wheel, 8...Mountain/hammer renoid, 9...
...Printing ribbon, 10...Printing paper, 11...
... Paper press roller, 12 ... Guide member, 1
3...Support member, 14...Spring.

Claims (1)

[Claims] a platen, a roller that presses and presses the printing paper wound around the platen, a guide member that rotatably pivots the roller and guides the printing paper along the platen, a machine frame, and the guide member. a support member that pivots between the machine frame and the support member and is inserted into a through hole drilled in the machine frame and is rotatable about the through hole as a fulcrum; A paper feeder comprising: an elastic member for applying a pressing force to the roller; and a release member that contacts the support member and pushes down the support member against the biasing force of the elastic member to release the pressure contact of the roller. Device.