JPS585565A - Supporting mechanism of reciprocative moving body - Google Patents

Abstract

PURPOSE:To support a reciprocative moving body such as shuttle bar with less noises and wear by supporting this reciprocating body at the center of a pair of links arranged to the right and left, hanging the ends of links rotatably with leaf springs made of the same material in approx. equal dimensions stretching from above and under, and thereby providing such an arrangement that the center of the links makes always straight motion. CONSTITUTION:When a shuttle bar 1 is moved leftward, the upper 10 and lower 16 support springs are deflected both to the left. Choosing dimensions and material of these springs 10, 16 to the same will at this time give the same amount of deflection with the springs 10, 16 caused by movement of the shuttle bar 1, and as a result pivots 14 and 20 will be deflected in the same amount upward and downward. Accordingly, an eventual inclination of a link 6 does not change the vertical position of the pivot 8 as the center of said link 6. This effect applies also to supporting of the right end of the shuttle bar 1, which is thereby retained horizontally always during its reciprocative motion.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support mechanism for a reciprocating body that continuously reciprocates over a certain section.

Conventionally, for example, in a dot line printer, a printing element carrier called a horizontally long shuttle bar is moved back and forth continuously over a certain period of time in the horizontal direction, and the printing element carriers are arranged on the shuttle bar in parallel at a certain interval in the direction of movement. The printing element is driven to simultaneously print multiple dots on the same line.
Since the shuttle bar is generally supported by a bearing guide, it generates a lot of noise and wear of the bearings becomes a problem.

The present invention aims to reduce noise and wear when supporting a reciprocating body such as the above shuttle bar.
A reciprocating body is supported at the center of a pair of left and right links, and both ends of the link are rotatable from above and below with board snorings made of the same material and of approximately equal dimensions, and the center of the link is configured to always move linearly. It is something.

The present invention will be explained below using a dot printer as an example with reference to the drawings.

FIG. 1 is a plan view showing essential parts of an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a side view thereof.

In FIGS. 1 to 3, 1 is a shuttle bar on which a plurality of printing elements 2 are supported at equal intervals, and 3 is engaged with a groove 1a of a driven portion projecting below the shuttle bar 1. 5 is a drive shaft rotated by a drive source such as a motor (not shown); 6 and 2;
are links 10 and 1 connected to both left and right ends of the shuttleper 1 via pivots 8 and 9 located at the center thereof.
1 is an upper support support f whose one end is fixed to the left and right upper frames 12 and 13, and whose other end is connected to pivots 14 and 15 attached to the outer ends of the links 6 and 7 via arm parts 10a and 11a. One end of the IJ rings 16 and 17 is fixed to the left and right lower frames 18 and 19, and the other end is connected to pivots 20 and 21 attached to the inner ends of the links 6 and 7 via arm parts 16a and 17a. This is the lower support spring.

In the above configuration, the shuttleper 1 is placed in a position facing the illustrated Senu print paper, and is translated in a direction across the print paper. The printing element 2 on it is the shuttleper 1
The number of characters to be printed during the movement of the receiver is selectively driven in response to a turn signal, one of which has the printing of dots for one or more characters. Power for reciprocating the shuttleper 1 in the horizontal direction is applied to the drive shaft 5, and the rotary disk 3 rotates in a constant direction at a constant speed during printing. As a result, the horizontal position of the eccentric pin 4 changes continuously, and the shuttleper 1 is moved left and right through the groove 1a. The reciprocating stroke of the shuttleper 1 is twice the distance from the center of the rotating disk 3 to the center of the eccentric pin 4.

Both ends of the shuttleper 1, which is reciprocated in this way, are supported by a pair of upper and lower support springs via links as described above. For example, as shown in FIG. 4, the shuttleper 1 is moved to the left. In this case, both the upper support spring 10 and the lower support spring 16 are bent to the left.

At this time, if the dimensions and materials of the upper and lower support springs 10.16 are the same, the amount of deflection of the support 2 springs 10.16 due to the movement of the shuttleper 1 will be the same, and as a result, the positions of the pivots 14 and 20 will be the same. is displaced by the same amount upward and downward. Therefore, even if the link 6 is tilted as shown, the vertical position of the pivot 8, which is the center thereof, does not change. This effect also applies to the right end support of the shuttleper 1. Therefore shuttle par 1
remains horizontal throughout its reciprocating motion. The length of the support springs on the lower side may be slightly longer than the support springs on the lower side, taking into consideration the deflection due to the weight of the shuttleper 1.

As described above, since the reciprocating body support mechanism of the present invention uses springs to support the reciprocating body in a hanging manner, there are fewer mating parts, which has the effect of reducing noise and component wear. .

Although the above embodiment describes a configuration in which the shuttleper is reciprocated in the horizontal direction in a dot printer,
The present invention is not particularly limited to this, but can be applied to anything that reciprocates linearly in a given direction.

[Brief explanation of the drawing]

l...shuttleper, 6,7...link, 10゜1
1.16.17...Support spring. (5)

Claims (1)

[Claims] In a support mechanism for a reciprocating body that continuously reciprocates over a certain area, the reciprocating body is supported at the center of a pair of left and right links, and both ends of the links are rotated from above and below by plate springs made of the same material and having approximately equal dimensions. 1. A support mechanism for a reciprocating body, characterized in that the center of the link is configured to always move linearly.