JPS62937Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field This invention relates to a printer in which a carriage on which a printing head is mounted performs a printing operation on printing paper while reciprocating along the printing line direction of a platen. This invention relates to a printer in which a portion of a toothed belt, which is driven by a suitable drive means, is fixed to a carriage for reciprocating movement.

Purpose of the invention The purpose of the invention is to provide a printer that simplifies the structure of the connecting portion between the carriage and the toothed belt, and allows the assembly of the two to be performed extremely easily.

Embodiment Hereinafter, an embodiment embodying this invention will be described based on the drawings.A guide rod 2 serving as a guide member fixed to a machine frame 1 of a printer so as to extend in the left-right direction has a printing head. A carriage 4 on which a printer 3 is mounted is supported so as to be able to reciprocate along the print line direction of a platen 5, and the print head 3 performs a printing operation on printing paper (not shown) on the platen 5. It's getting old.

As shown in FIG. 2, a drive motor 6 is supported on a part of the machine frame 1, and a small diameter drive toothed pulley 8 is fixed to the motor shaft 7. Further, at one end of the reciprocating range of the carriage 4, a large-diameter driven toothed pulley 10 is supported by a shaft 9 on the machine frame 1, and between the driven toothed pulley 10 and the drive toothed pulley 8, A toothed belt 11 is interposed therebetween.

A small-diameter toothed support pulley 12 is supported on the shaft 9 of the driven toothed pulley 10 so as to be able to rotate integrally with the driven toothed pulley 10. At the other end of the reciprocating range of the carriage 4, the machine frame 1
A toothed support pulley 14 having approximately the same diameter as the support pulley 12 is supported by a shaft 13, and a running portion 15A is provided between the support pulleys 12 and 14 to reciprocate in parallel to the printing line direction. A toothed belt 15 is stretched over the belt. Therefore, when the drive motor 6 is driven to rotate, the toothed belt 15 runs via the drive toothed pulley 8, the toothed belt 11, and the driven toothed pulley 10.

A toothed belt 1 is installed at the bottom of the carriage 4.
An extension part 16 extending to the running surface of 5 is integrally formed. A pair of left and right guide protrusions 17 are formed protruding from the lower surface of the extension portion 16, and arcuate guide surfaces 17a are formed at their lower ends. The extension portion 1 is arranged so as to protrude upward from the guide surface 17a in the middle of the guide protrusions 17.
A support protrusion 18 is integrally formed on the support protrusion 6, and an arc-shaped support surface 18a is formed on the upper surface of the support protrusion 18. As shown in FIG. 3, an engaging tooth portion 18b is formed on the support surface 18a so as to be able to engage with the tooth portion 15a of the toothed belt 15. Further, a pair of grooves 19 are provided between both guide protrusions 17 and support protrusions 18 to separate the protrusions 17 and 18.
is formed, and the groove portion 19 has an opening 19 that opens toward the end surface in the extension direction of the extension portion 16.
It has a.

Then, a part of the upper running portion 15A of the toothed belt 15 is inserted into both the grooves 19 and guided and supported by the guide surface 17a of the guide protrusion 17 and the support surface 18a of the support protrusion 18. Engagement tooth portion 18b on 18a and toothed belt 15
The belt 15 engages with the teeth 15a of the belt 15.
The side edges of the carriage 4 are regulated by the outer surface 4a of the carriage 4, and the carriage 4 and the toothed belt 15 are connected and fixed. Therefore, as the toothed belt 15 runs, the carriage 4 is reciprocated from side to side.

Now, in the printer configured as described above, in order to connect and secure the toothed belt 15 and the carriage 4, a part of the running portion 15A of the toothed belt 15 is inserted into the groove 19 through its end opening 1.
9a until it comes into contact with the outer surface of the carriage 4, and the upper surface of the running portion 15A is guided and supported by the guide surfaces 17a of both guide protrusions 17, and the lower surface of the running portion 15A is supported by the support protrusion 18. Both toothed portions 15a,
When the belt 18a is engaged, the belt 15 and the carriage 4 are connected and fixed. In this way, the belt 15
and the carriage 4 are fixedly connected by the belt 15.
It is only necessary to insert the groove 19 into the groove 19 from the end face side opening 19a, and this can be done very easily.

Moreover, since no separate parts are used for fixing the toothed belt 15 and the carriage 4, the structure is extremely simple.

Note that the engaging tooth portion that engages with the tooth portion 15a of the toothed belt 15 may be provided on the guide surface 17a of the guide protrusion 17. It is necessary to fix it to the belt 15 at the lower running portion of the belt 15, or to make the protruding direction of the guide surface 17a and the support surface 18a upside down compared to the above embodiment.

Effects of the invention As illustrated in the examples above, this invention inserts a part of the running part of the toothed belt into the groove between the guide surface and the support surface, and uses the guide surface and the support surface to By guiding and supporting a part of the toothed belt and engaging the teeth of the toothed belt with the engaging teeth provided on the guide surface or support surface, assembly is extremely easy, and parts can be easily assembled. It exhibits an excellent effect of reducing the number of points and simplifying the structure.

[Brief explanation of drawings]

Figure 1 is a partially omitted front view of a printer embodying this idea, Figure 2 is a rear view showing the drive mechanism,
FIG. 3 is an exploded perspective view showing the main parts of this invention. Machine frame 1, guide rod 2, print head 3, carriage 4, platen 5, drive motor 6, toothed belt 15, extension 16, guide surface 17a, support surface 1
8a, engaging tooth portion 18b, groove portion 19, end face side opening 1
9a.

Claims (1)

[Claims for Utility Model Registration] A carriage 4 on which a printing head 3 is placed is reciprocated along the printing line direction of a platen 5 while being guided by a guide member 2 supported by a machine frame 1 to print on printing paper. The printer for operation includes a toothed belt 15 which is driven by an appropriate driving means 6 and stretched so as to have a running portion 15A that reciprocates in parallel with the printing line direction, and the carriage 4 is driven by a suitable driving means 6. It has an extension part 16 extending to the running surface of the toothed belt 15, and the extension part 1
6 has a pair of guide surfaces 17a and the guide surface 1
7a and a support surface 18a protruding from the guide surface 17a; the support surface 18a and the guide surface 17a are separated from each other; Opening 19a
A pair of grooves 19 are provided for inserting a portion of the running portion, and either the guide surface 17a or the support surface 18a is provided with a pair of grooves 19 for engaging with the teeth 15a of the toothed belt 15. A toothed portion 18b is formed, and a portion of the running portion 15A of the toothed belt 15 is inserted into the groove portion 19 to form the guide surface 17a.
A printer characterized in that the carriage 4 and the toothed belt 15 are fixed to each other by guiding and supporting a part of the support surface 18a.