JPS6287375A - Carriage-fixing mechanism for printer - Google Patents

Abstract

PURPOSE:To ensure that a carriage can be easily inhibited from moving and the inhibition can be easily canceled, by a method wherein parts of a timing belt bent back are laid on each other by engaging the teeth provided at opposed inner surfaces of the timing belt to each other, and a clamp member is fitted to the parts laid on each other. CONSTITUTION:Parts of a timing belt 16 bent back at a driving pulley 17 or a driven pulley 18 are laid on each other by engaging the teeth provided at opposed inner surfaces (a), (a) of the belt 16 to each other. A clamp member 23 is fitted to the overlapping part (b) so that the part (b) is clamped between two elastic pieces 24, 24 on one side and an elastic piece 25 on the other side, thereby maintaining the part (b) in the overlapping condition. As a result, the timing belt 16 is restrained from moving, and a carriage 15 is inhibited from being moved. In addition, the inhibition can be canceled simply by removing the clamp member.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention is applicable to printers, plotters, typewriters, etc. that print sequentially on paper using a print head mounted on a carriage while moving a carriage along a platen. It can be applied to the device. In particular, the present invention relates to a carriage fixing mechanism during conveyance in a printing device that uses a timing belt to drive the carriage.

2. Description of the Related Art Conventionally, in a printing device such as a printer, a carriage (1) is connected to a timing belt (2) as shown in FIG.
The support shaft (3) guides the platen (4).
), the print head (5) mounted on the carriage (1) sequentially prints on the paper (6) set on the platen (4).

However, in this type of printing device, the carriage (1) moves back and forth during transportation, and there is a risk of damage due to impact.

For this reason, in the past, for example, a vinyl tube (7) was attached to the support shaft (3), and the carriage (1) was held down by the tip of the vinyl tube (7) to restrict the movement of the carriage. In addition.

Here, the vinyl tube (7) is prepared by, for example, cutting a part of the tube along the longitudinal direction, pushing the cut part open and placing it over the outer periphery of the support shaft (3).
) was attached so as to wrap around it.

Furthermore, as shown in FIG. 8, for example, a bracket (8) bent into a crank shape is used, and the bracket (8)
There was also one in which both bent pieces (8a) and (8b) of ) were screwed to the carriage (1) and the bottom hole of the main body (9), respectively, to restrict the movement of the carriage (], ).

However, although the former has the advantage that it is easy to prevent and release the movement of the carriage ( ), it has the disadvantage of high cost because it uses a vinyl tube (7). Ta.

Furthermore, the latter has the disadvantage that it is troublesome to attach and remove the bracket (8), resulting in high costs.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a carriage fixing mechanism for a printing device, which is low in cost and which makes it easy to move and fix the carriage and release the fixation.

Means for Solving the Problems Therefore, the carriage fixing mechanism according to the present invention is such that the carriage (15) is mounted on the carriage (15) while the carriage (15) is driven by the timing belt (16) and moves along the platen (10). In a printing device that sequentially prints on sheets of paper (22) set on the platen (10) with a print head (2I), the folded timing belt (
16) are partially overlapped by interlocking the unevenness formed on the opposing inner surfaces (a) and (a), and the clamp members (23) and (26) are attached to the overlapped portion (b). shall be.

Sakukawa - The overlapping portion (b) regulates the movement of the timing belt (16) and prevents the carriage (15) from moving.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to embodiments shown in the drawings.

FIG. 1 shows a printer in which the movement of a carriage is regulated based on a carriage fixing mechanism according to the present invention, and FIG. 2 schematically shows the internal mechanism of the printer.

Reference numeral (10) in the figure is a platen. Platen (1o
) has both ends connected to the left and right side frames (11) and (
J2) is supported. Those side frames (11)・
(12) also carries a support shaft (13) and a rear steering wheel (14), each of which is parallel to the platen (10).

Their support shaft (13) and rear steer (14) support the carriage (15). Carriage (15)
Attach both ends of the timing belt (16) to each. The timing belt (16) is connected to the drive pulley (1
7) and the driven pulley (18). Drive pulley (
17) is the motor shaft (20) of the space motor (19)
Attach to.

The space motor (19) is attached to the right side frame (12).
). The drive pulley (17) is driven by the motor (19), the timing belt (16) is moved, and the carriage (15) is guided by the support shaft (13) to reciprocate along the platen (10). move. At this time, the print head (21) mounted on the carriage (15)
) to sequentially print on sheets of paper (22) set on a platen (10).

By the way, the timing belt (16) is attached to the drive pulley (
17) As shown in FIG. 3, irregularities are formed on the inner surface (a) so that it can mesh securely without slipping.

The carriage fixing mechanism according to the present invention has a drive plate part (1
7) or the opposing inner surfaces (a) and (a) of the timing belt (1G) folded back by the driven pulley (18)
), the timing belts (16) are partially overlapped by interlocking the irregularities formed on the timing belts (16) as shown in FIG. Then, a clamp member (23) is attached to the overlapped portion (b) as shown in FIG. ) and its overlapping part (b)
The overlapping state is maintained as shown in FIG. Alternatively, a commercially available clamp member (26) as shown in FIG. 6 may be used, and the overlapping state may be maintained by sandwiching between elastic pieces (27) and (28).

Therefore, according to the present invention, the unevenness of the folded timing belt (16) is interlocked and overlapped, and the overlapping state is maintained by the clamp members (23) and (26), so that the movement of the timing belt (16) is prevented. is regulated;
The movement of the carriage (15) will be stopped.

Effects of the Invention Therefore, according to the present invention, movement of the carriage during conveyance can be prevented by a simple operation of engaging the unevenness of the folded timing belt, overlapping a portion thereof, and attaching a clamp member thereto. Moreover, the blocking can be released by simply removing the clamp member. Moreover, since only a clamp member is required, the cost is much lower than that of the conventional method.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a printer in which carriage movement is regulated based on the carriage fixing mechanism according to the present invention, Fig. 2 is a plan view schematically showing its internal mechanism, and Fig. 3 is a timing belt used in the printer. A partially enlarged perspective view of
FIG. 4 is an enlarged explanatory view showing the state in which the timing belt is folded back and the concave and convex portions are engaged with each other, and FIGS. 5 and 6 are perspective views respectively illustrating the attachment of the clamp member to the overlapped portion. be. Figures 7 and 8
The figures are a perspective view and a front view, respectively, illustrating a conventional mechanism.

Claims (1)

[Claims] In a printing device in which a carriage is driven by a timing belt and moves along a platen, a print head mounted on the carriage sequentially prints on sheets of paper set on the platen. A carriage fixing mechanism for a printing device, in which the formed irregularities are interlocked and partially overlapped, and a clamp member is attached to the overlapped part.