JPS62127269A - Printer - Google Patents

Abstract

PURPOSE:To markedly shorten the period of time required for adjusting the tension on a wire, by a construction wherein an arm plate is provided which has an operating piece between a driving pulley and a driven pulley, and the distance between the axes of the pulleys is varied by turning the arm plate, thereby adjusting the tension on a wire. CONSTITUTION:An operating piece 8c provided at a part of an arm plate 8 for supporting a driven pulley 7 is located between a driving pulley 6 and the driven pulley 7. Therefore, the distance between the pulleys 6 and 7 can be varied simply by turning the arm plate 8 through operating the operating piece 8c, without detaching a cabinet as in a conventional construction. Accordingly, an appropriate tension can be applied to a wire 5.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a printing device used for outputting from computers, word processors, and the like.

2. Description of the Related Art In recent years, with the spread of computers, word processors, etc., various types of printing devices have been used as data output devices.

FIG. 3 is a plan view of essential parts of a conventional printing device.

1 is a platen driven by a motor (not shown in the figure) via a platen gear 1a; 2 is a print head 2;
3 is a main shaft that passes through the carriage 2; 4 is an auxiliary shaft that supports the carriage 2; 10 is a main shaft 3;
and a chassis to which an auxiliary shaft 4 is fixed; 5 is a wire serving as a drive transmission medium; both ends of the wire 5 are fixed to the carriage 2; 6 is a drive pulley driven by a motor (omitted in the figure); 7
is a driven pulley that follows wire 5, 18 is bolt 1
The pulley attachment which supports the driven pulley 7, which is integrally formed with the pulley 8a, is a metal fitting, and the pulley attachment metal fitting 18 is fixed by tightening a nut 18b. The right side of the chassis 10 where the nut 18a is located and the left side of the chassis 10 where the platen gear la is located are normally covered by a cabinet, but these are omitted in the figure.

The operation of the conventional printing device configured as described above will be explained below.

Move the nut 18b to move the position of the pulley 7,
Appropriate tension is applied to the wire 5 by changing the distance between the driving pulley 6 and the driven boob 9-7. Note that since the spring constant of the wire 5 is as large as approximately 2.5 kg/mm, delicate adjustment is required to obtain an appropriate tension.

Problems to be Solved by the Invention However, in the conventional printing device as mentioned above,
Tighten 8a to give tension to wire 5,
The part where the nut 18b is located is usually hidden behind the cabinet, and in order to tighten the nut 18b, it is necessary to remove the cabinet, making adjustment after assembly difficult and time-consuming. An operation piece is provided in a space between the driven pulley and the driven pulley, and includes a support member that supports the driven pulley and is pivotally supported on the chassis, and a fixing means that fixes the support member to the chassis, and rotates the support member to control the driving pulley. The distance between the wire and the driven pulley is changed to change the tension of the wire.

Since the operating piece of the support member is located between the drive pulley and the driven pulley, the tension of the wire can be easily adjusted by simply rotating the support member without removing the cabinet as in the conventional case.

Embodiment FIG. 1 is a plan view of essential parts of a printing device in an embodiment of the present invention. In the figure, 1 is a platen, 2 is a carriage,
3 is a main shaft, 4 is an auxiliary shaft, 5 is a wire, 6 is a driving pulley, and 7 is a driven pulley, which are similar to the conventional structure. 8 is an arm plate that supports the driven pulley, and 10 is a chassis. Second
As shown in more detail in the figure, 8a is a hole provided in the chassis 10, and 8b is a hole for connecting the arm plate 8 to the chassis 10.
8c is an operating piece provided on a part of the arm plate 8, and 8d is a long and large operation piece provided on a part of the arm plate 8. Insert the driven pulley 7 in the direction of arrow A, fit the E ring 20 from the direction of arrow B, and then press the driven pulley 7. 10a is a stepped shaft that supports the arm plate 8 by passing it through the hole 8a as shown by arrow C, and fitting the E-ring 21 from the direction of the arrow. 10C is the stepped shaft 8d.
The hole that escapes the caulking part on the back side, lOd is the auxiliary shaft 4
This is a hole that supports the

The adjustment of the tension of the wire in the printing apparatus of this embodiment configured as described above will be explained below.

First, with the screw 22 loosened, operate the operating piece 8c to rotate the arm plate 8 and change the distance between the drive boob 9-6 and the driven boob 9-7 to apply a suitable bump to the wire 5. give.

Next, in this state, tighten the screws 22 to fix the arm plate 8.

Effects of the Invention The present invention includes an arm plate having an operating piece between a driving pulley and a driven pulley, and rotates the arm plate to change the distance between the axes between the driving pulley and the driven pulley to adjust the tension of the wire. Because of this structure, there is no need to remove the cabinet during adjustment (adjustment can be done as easily as replacing an ink ribbon, and the adjustment time is significantly reduced. Figure 1 shows the printing device in one embodiment of the present invention). The main part is a top view, Fig. 2 is an exploded γ1 inkstone drawing of the same main part, and Fig. 3 is a 1°C
The main part of the east printing device is shown on the plane [4te, 1').

2... Carriage, 3... Main shaft, 4... Auxiliary shaft, 5... Wire, 6... Drive pulley, 7... Driven pulley, 8... Arm plate, 1
0... Name of Nyashi's agent Patent attorney Toshiba Nakao 1 person Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A carriage on which a printing means is mounted, a guide that slidably supports the carriage, a chassis that supports the guide, a traction member that is coupled to the carriage and moves the carriage along the guide, and the traction member. a first rotating body that drives the traction member; and a second rotating body that is driven by the traction member.
a rotating body, and an operating piece located in a space between the first rotating body and the second rotating body and integrally formed;
and a support member rotatably supported by the chassis, and a fixing means for fixing the support member to the chassis,
The support member is rotated to connect the first rotating body and the second rotating body.
A printing device characterized in that the tension of the pulling member is changed by changing the center-to-axis distance between the rotating bodies.