JP2000043360A5

JP2000043360A5 -

Info

Publication number: JP2000043360A5
Application number: JP1998213640A
Authority: JP
Filing date: 1998-07-29
Publication date: 2005-08-18

Description

反転付勢手段である弾性体４０をガイドシャフト１１上のハンマバンク１０側の直動軸受け１２ｂと、カウンタバランサ２１側の直動軸受け１２ｃのほぼ中央位置に配置し、さらに弾性体４０のほぼ中央をガイド４１で固定することで、ハンマバンク１０が左反転位置に向かう場合、ハンマバンク側直動軸受け１２ｂが弾性体４０の右側から速度ｖで衝突し、カウンタバランサ側直動軸受け１２ｃが弾性体４０の左側から速度ｖで衝突することになる。ハンマバンクが右反転位置に向かう場合も同様である。 The elastic body 40, which is a reversing urging means, is arranged at approximately the center position of the linear motion bearing 12b on the hammer bank 10 side and the linear motion bearing 12c on the counter balancer 21 side on the guide shaft 11, and further substantially at the center of the elastic body 40. the by fixing the guide 41, when the hammer bank 10 toward the left reversing position, the hammer bank side linear bearing 12b collides with the right or al velocity v of the elastic body 40, the counter balancer side linear bearing 12c is It will collide with the left or al velocity v of the elastic body 40. The same applies when the hammer bank heads to the right inverted position.

弾性体４０を系の基準とし、ハンマバンク１０側の質量をｍ、カウンタバランサ２１側の質量も同じくｍ、衝突の速度をどちらもｖとすると、ハンマバンク１０側の衝突時のエネルギＥshが（1/2）ｍｖ²、カウンタバランサ２１側の衝突時のエネルギＥscも（1/2）ｍｖ²となり、本発明による衝突時の全エネルギＥ1は次式となる。 An elastic body 40 as a reference system, the mass of the hammer bank 10 side m, the mass of the counter balancer 21 side likewise m, when the velocity Both the v collision, the energy Esh at the hammer bank 10 side collide (1/2) mv ² and the energy Esc at the time of collision on the counter balancer 21 side are also (1/2) mv ² , and the total energy E1 at the time of collision according to the present invention is given by the following equation.

【符号の説明】
１０はハンマバンク、１１はガイドシャフト、１２ａ・１２ｂ・１２ｃは直動軸受け、２０はリニアモータ、２１はコイル兼カウンタバランサ、３０は反転機構部、３１はタイミングベルト、３２はタイミングプーリ、４０は弾性体、４１はガイド、４２は弾性体保持材、５０はホルダ、５５は弾性リング、６０は緩衝材、６１は硬い緩衝材、６２は柔らかい緩衝材である。
[Explanation of symbols]
10 is a hammer bank, 11 is a guide shaft, 12a, 12b, 12c are linear motion bearings, 20 is a linear motor, 21 is a coil and counter balancer, 30 is a reversing mechanism, 31 is a timing belt, 32 is a timing pulley, and 40 is. An elastic body, 41 is a guide, 42 is an elastic body holding material, 50 is a holder, 55 is an elastic ring, 60 is a cushioning material, 61 is a hard cushioning material, and 62 is a soft cushioning material.

Claims

A hammer bank having a plurality of dot printing hammers, and a shuttle mechanism for reciprocating the hammer banks in the digit direction, and performing printing by driving the dot printing hammers during the reciprocating movement of the hammer banks. A counter balancer that reciprocates in the opposite phase to the reciprocating movement of the hammer bank, and further includes a reversing biasing means for imparting a reversing bias in the vicinity of both amplitudes of the reciprocating movement of the hammer bank or counter balancer. In the printing device
The printing apparatus according to claim 1, wherein the reverse biasing means is disposed at a substantially intermediate position between the collision surfaces on the hammer bank side and the counter balancer side.

The printing apparatus according to claim 1,
The hammer bank, the counter balancer, and the reverse biasing means are connected to a guide shaft for guiding reciprocal movement, and the reverse biasing means is provided with a holding material for holding the guide shaft. A printing device characterized by.

The printing apparatus according to claim 2,
The printing apparatus according to claim 1, wherein the holding material uses a friction force generated between the holding shaft and the guide shaft as a holding force.

The printing apparatus according to any one of claims 1 to 3,
The collision surface of the reverse biasing means has a two-layer structure of a soft cushioning material that absorbs an impact immediately after a hammer bank or counter balancer collision and a hard cushioning material that can withstand the subsequent reversing operation. Printing device.

A hammer bank having a plurality of dot printing hammers, and a shuttle mechanism for reciprocating the hammer banks in the digit direction, and performing printing by driving the dot printing hammers during the reciprocating movement of the hammer banks. A counter balancer that reciprocates in the opposite phase to the reciprocating movement of the hammer bank, and further includes a reversing biasing means for imparting a reversing bias in the vicinity of both amplitudes of the reciprocating movement of the hammer bank or counter balancer. In the printing device
Each collision surface on the hammer bank side or the counter balancer side of the reverse biasing means is composed of a soft buffer material that absorbs an impact immediately after the hammer bank or counter balancer collision, and a hard buffer material that can withstand subsequent reverse operation. A printing apparatus having a two-layer structure.