JPH055452Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a carriage support device for a recorder attached to a printing mechanism within the recorder.

[Prior Art] For example, in the general structure of a conventional printing mechanism installed in a thermometer recorder, a printer head is attached to the front end of a carriage that is slidably conveyed from side to side. The middle part is inserted into a guide shaft that is horizontally suspended between the left and right side plates of the chassis and is guided and held horizontally, and the rear end is fitted into a support shaft that is horizontally suspended between the chassis side plates in parallel to the guide shaft. The upper and lower positions of the printer head are slidably engaged and supported, thereby maintaining the gap between the lower surface of the printer head and the upper surface of the platen at an appropriate size (for example, 0.35 mm). It is said to have a structure that allows it to stand.

However, in the conventional carriage support device configured in this way, both ends of the support shaft are fixedly attached to the side plates of the chassis, and therefore the height of the bottom surface of the print head is fixed and the distance between it and the platen is fixed. The structure made it impossible to adjust the gap after assembly.

[Problems to be solved by the invention] According to such a conventional support device, when the printing density on the recording paper is too dark or too light, the gap size between the print head and the platen can be reduced. Since the degree remains unchanged, there was a problem in that there was no way to correct it.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a recorder carriage support device that allows fine adjustment of the gap between the lower surface of the print head and the upper surface of the platen.

[Means for solving the problem] In order to achieve the purpose, in the configuration of the present invention, the left and right ends of the support shaft that engages and supports the vertical position of the rear end of the carriage are finely adjusted in height. A structural system is adopted in which bearings are mounted on the side panels of the chassis.

[Function] Based on this structure, the function of the carriage support device of the present invention is that the printer head moves up and down as the carriage swings based on the vertical adjustment movement of the support shaft, and The gap size between the platen and the platen increases or decreases, so after the print mechanism is assembled, the gap size can be set appropriately by adjusting the support shaft with your hands from outside. becomes.

[Example] Hereinafter, the configuration of the present invention will be specifically described based on an example shown in FIGS. 1 to 10.

FIG. 1 is a diagram showing the chassis in the front half of the recorder and the main parts of the printing mechanism. The carriage 1 is held by a guide shaft 6 and a support shaft 7, which are horizontally suspended between the left and right side plates 4 and 5 of the chassis. A roller-shaped platen 8 is installed near the bottom.

Specifically, a through hole 2a is formed at the lower side of the intermediate portion of the carriage main body 2 in the front-rear direction, and the through hole 2a extends completely in the left-right direction.
It is slidably fitted onto a guide shaft 6 fixed to the right side plates 4 and 5, and a cutout groove 2b with a U-shaped cross section that opens on the rear surface is provided on the lower side of the rear of the main body 2. This notch groove 2b is perforated completely through the
As described below, both ends thereof are inserted into and engaged with the support shaft 7 which is supported by the side plates 4 and 5.

In addition, in one place near the upper end of the right side plate 5,
An engagement groove 5a consisting of an arc-shaped elongated hole is bored, and bearing holes 4a and 5b are bored in the left and right side plates 4 and 5, respectively, at positions facing the support shaft 7. There is.

By the way, protrusions 7a and 7b whose cross-sectional shape is slightly wider than a semicircle extend from the left and right side ends of the support shaft 7, and each protrusion 7a and 7b is connected to the side plate 4 in the following manner. and is supported by the side plate 5.

(a) Protrusion 7a at the left end This protrusion 7a is supported in the bearing hole 4a of the side plate 4 via an eccentric disk 9. Specifically, the eccentric disk 9 is located at the center of its inward end surface. A recessed step 9a having a shape into which the protrusion 7a fits is formed, and the protrusion 7a is fitted and engaged with the recessed step 9a, and the outward end surface of the eccentric disk 9 A boss shaft 9b is formed to protrude at the eccentric position, and the boss shaft 9b is fitted into the bearing hole 4a of the side plate 4.

In addition, a flange 9c is formed on the outward end surface of the eccentric disk 9, and a wave-shaped disc spring 10 is interposed within the flange 9c, so that the inner surface of the side plate 4 and the eccentric There is a slight gap between the disk 9 and the flange 9c surface.

(b) Right end protrusion 7b This protrusion 7b is supported by the bearing hole 5b of the right side plate 5 via the adjustment lever 11, and specifically:
The adjustment lever 11 has an eccentric disk 12 forming the base of the lever 11 and a rotating arm 13 made of a long plate.
First, this eccentric disk 12, which is similar to the left eccentric disk 9, has a protrusion 7b fitted into and engaged with a recessed step 12a recessed in its inward end surface. The boss shaft 12b that protrudes from its outward end face is fitted into the bearing hole 5b of the side plate 5.

Next, on the outward facing surface of the tip of the swing arm 13,
A large-diameter navel-shaped protrusion 13a and a small-diameter navel-shaped protrusion 13b are protrudingly molded in two stages. Fitted into position and engaged.

Therefore, both groove edges along the longitudinal direction of the engagement groove 5a are provided with wave-like unevenness, and the width of the wide portion is set to a width that allows the large-diameter protrusion 11a to fit therein. The width of the narrow portion is set to a width that allows the small-diameter protrusion 11b to fit therein.

On the other hand, since the support shaft 7 is biased toward the right side plate 5 by the elastic force of the disc spring 10, the large-diameter protrusion 1
3a is fitted into any of the wide portions of the engagement groove 5a (for example, the state shown in FIGS. 1 and 2), the adjustment lever 11 is locked in its rotational movement.

However, if the small-diameter protrusion 13b is pushed in by manual operation against the elasticity of the disc spring 10, and thereby the large-diameter protrusion 13a is pushed out from the engagement groove 5a, the small-diameter protrusion 13b is freely engaged. Since it can move within the groove 5a,
The locking position can be easily changed by rotating the adjustment lever 11. In other words, as shown in FIG. (In the illustration, it can be locked in 11 positions). In addition, adjustment lever 1
If a resilient material such as resin is used for 1, the operation becomes much easier. Further, since the shaft 7 is pressed in either the left or right direction by the disc spring 10 and fixed so that the shaft 7 does not move, the movement of the carriage 1 in the left and right direction becomes stable.

Therefore, with the carriage support device of the embodiment configured as described above, after the print mechanism of the recorder is assembled, the height of the support shaft 7 can be easily finely adjusted by manual operation from the outside. The printer head 3 moves up and down with the slight rocking movement of the carriage 1 based on this fine adjustment operation.
Thereby, it is possible to finely adjust the size of the gap between the platen 8 and set it to an appropriate size.

[Effects of the invention] As described above, according to the carriage support device for a recorder according to the invention, both ends of the support shaft that supports the end of the carriage slidably inserted into the guide shaft are The printer is configured so that it can be finely adjusted by bearing on the side plate of the chassis, so after the printing mechanism is assembled, the gap between the printer head and the platen can be easily adjusted from the outside to the appropriate size. This makes it possible to set the recording paper at the same time, which has the effect of obtaining high-quality prints on the recording paper.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a carriage support device for a recorder showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. A perspective view, FIG. 4 is a left side view of the eccentric disk in FIG. 2, FIG. 5 is a front view of the same, FIG. 6 is a right side view of the same, and FIG. 7 is an adjustment lever of FIG. 2. 8 is a front view of the same, FIG. 9 is a right side view of the same, and FIG. 10 is an enlarged side view of portion X in FIG. 1...carriage, 3...printer head,
4, 5... Side plate, 4a, 5b... Bearing hole, 6...
Guide shaft, 7...support shaft.

Claims (1)

[Scope of utility model registration request] The middle part of the carriage is slidably inserted into a guide shaft that is horizontally suspended in the left-right direction, and a printer head is attached to the front end of the carriage, and a support parallel to the guide shaft is attached to the rear end of the carriage. The carriage support device is engaged and held in the vertical position so as to be slidable on the shaft, and the left and right side ends of the support shaft are supported by the side plates of the chassis so that the height can be finely adjusted. A carriage support device for recorders.