JPS61227053A - Type-selecting device for marking machine - Google Patents

Abstract

PURPOSE:To enable a predetermined character train to be easily obtained at high speed, by a method wherein a driving pinion is aligned with a predetermined type wheel, and a type in the type wheel is selected. CONSTITUTION:The type-selecting device 10 comprises a driving pinion position shifting mechanism 46 which moves a movable plate 44 in parallel to a spline shaft 36 to shift the position of the driving pinion 38. A rotation-preventing plate 72 of the movable plate 44 comprises a recess 72a in which only an intermediate gear 40A meshed with the pinion 38 can be freely rotated. With a rotation drive source 34 driven, the pinion 38 is rotated, and the rotation is transmitted to the type wheel 24, whereby a predetermined type surface 24a is located at a marking position. In this case, the type wheel 24 is prevented from rotating by the rotation-preventing plate 72. Thereafter, another type wheel 24 is connected to the pinion 38 by the mechanism 46, and a predetermined type surface 34a is selected. Predetermined type surfaces of all of the type wheels 24 are thus selected to obtain a predetermined character train.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention involves pressure-welding a heated type wheel assembly to a booking material such as a wire sheath or a tube made of a material such as plastic or rubber through a colored tape. The present invention relates to a marking machine that performs marking, and more particularly to a device for selecting type on each type wheel of a type wheel assembly.

(Prior Art) Recently, there has been a demand for the development of a marking machine that automatically presses type onto a marking material to mark the marking material. This type of conventional marking machine has one type wheel, and after selecting and setting that one character or symbol to mark the marking material, selecting and setting other characters or symbols on the type wheel. This character or symbol is marked next to the marking material and this is repeated to obtain a predetermined character or symbol string (hereinafter referred to as character string). However, with this structure, in order to obtain a predetermined character string, it is necessary to select the same number of characters on the type wheel as there are character strings, and it is also necessary to change the position of the marking material or the type wheel each time. The disadvantage was that the mechanism was complicated. Other conventional marking machines include a typewheel assembly that includes a plurality of typewheels rotatably supported on a typewheel shaft. However, in this marking machine, the mechanism for selecting the type wheel of the type wheel assembly is complicated, and since there is a heater inside the type wheel assembly that heats the type wheel, the mechanism for selecting the type wheel is complicated. (Objective of the Invention) The object of the present invention is to be able to select the printing type on the printing wheel by a simple mechanism, and to An object of the present invention is to provide a type selection device for a marking machine that can prevent heat transfer to mechanical parts that require precision, thereby preventing deterioration in precision and durability.

(S composition of the invention) The type selection device of the marking machine of the present invention includes a drive pinion that engages with a spline shaft arranged parallel to the type wheel axis of the type wheel assembly and connected to a rotational drive source, and a drive pinion that selects a type. at least one intermediate gear in mesh with each other to transmit rotation to each type wheel of the type wheel assembly, the number of intermediate gears being equal to the number of type wheels;
The drive pinion position changing mechanism includes a movable plate that engages the drive pinion freely in the rotational direction and cooperatively in the axial direction, and moves the movable plate parallel to the spline shaft. It is characterized by

According to such a configuration, the drive pinion position conversion mechanism aligns the drive pinion with the predetermined type wheel and drives the sply shaft, thereby making it possible to easily select the type on the type wheel, and the intermediate gear to select the type from the type wheel. Since the heat is less likely to be transmitted to the drive pinion or its position changing mechanism, which requires precision, the precision and durability of the drive pinion do not deteriorate.

(Embodiment) An embodiment of the present invention will be described in detail with reference to the drawings. FIGS. 1 and 2 show a type selection device IO of a marking machine according to the present invention, and marking [12 is a marking material not shown in the drawings]. A material 1 to be marked is fed from a material supply source by a feeding means and fed onto the pedestal 14.
Type wheel assembly 2 heated through colored tape 18 at 6
0 is pressed down by an actuator 19 such as an air cylinder to mark the marking material 16. The type wheel assembly 20 consists of a plurality of gear-shaped type wheels 24 supported by a shaft tube 22, which is rotatably attached to a U-shaped frame 26 via a heat insulating bearing 28 such as asbestos. A type selection device a1 of the present invention supported on a type wheel shaft 30 via a heater 32
10. A drive pinion 38 engages with a spline shaft 36 disposed parallel to the type wheel shaft 30 of the type wheel assembly 20 and connected to a rotary drive source 34 such as a step motor. At least one intermediate gear group 42, which transmits rotation to each type wheel 24 of the wheel assembly 20 and is composed of the same number of intermediate gears 40 as the type wheels 24, and a drive pinion 38, which is free in the same rotational direction and axially includes a movable plate 44 that cooperates with the movable plate 44 to move the movable plate 44 parallel to the spline shaft 36 to change the position of the drive pinion 38;
In the illustrated embodiment, there are two intermediate gear groups 4OA, 40B, each intermediate gear group 42A, 42B having an insulating bearing 48A, such as asbestos, on the frame 26.
A gear shaft 50A rotatably supported by 48B,
In the illustrated embodiment, the drive pinions 38. Intermediate gear group 42 and type wheel assembly 2
0 are arranged side by side in the horizontal direction, which is preferable because the heat from the heater 32 is more difficult to be transmitted to the drive pinion 38.As can be seen from FIGS. 1 and 2, the actuator 19 is pivotally supported on a base 11 via a bracket 13, and its piston is mounted on a frame 26.
It is connected via knuckles 54 to both ends of a horizontal rod 52 that passes through. still.

The rotary drive source 34 is attached to a vertical frame 56, which will be described later, via a bracket 66', and its output shaft is connected to the screw shaft 36 via a coupling 70'.

The movable plate 44 of the drive pinion position conversion mechanism 46 includes a nut 60 screwed onto a screw shaft 58 rotatably supported by a pair of vertical frames 56 and a guide rod 62 similarly fixed to the pair of vertical frames 56. The screw shaft 58 is connected to a rotary drive source 68 such as a step motor fixed to one vertical frame 56 via a bracket 66 via a coupling 70. connected. still.

The vertical frame 56 is fixed to the base 11, and the mouth-shaped frame 26 is fixed to this vertical frame 56. The movable plate 44 has an annular groove 38a of the drive pinion 38 at its tip.
It has a semicircular notch 44a that engages with the movable plate 4.
4 is moved in the horizontal direction along the spline shaft 36 by the screw shaft 58, the drive pinion 38 is shifted in position so as to mesh with any intermediate gear 40A of the intermediate gear group 42A. The gear shaft 50A extends through the frame 26, and its extended end is supported by the vertical frame 56.

In the illustrated embodiment, the movable plate 44 has a detent plate 72 integral therewith, which detent plate 72 is connected to the drive pinion 38.
The escape groove 72 is arranged so that only one intermediate gear 40A aligned with the drive pinion 38 and meshing with the drive pinion 38 rotates freely.
It has a. Therefore, the width of the beveled groove 72a is set to be larger than n of one intermediate gear 40A and smaller than the thickness of the two intermediate gears. The width of this rotation prevention plate 72 (the length in the direction parallel to the spline shaft 36) is the intermediate gear group 42A.
approximately twice the axial length of the Therefore, the rotation stopper plate 72
Even if the notch 72a is positioned so as to be aligned with the intermediate gears at both ends of the intermediate gear group 42A, it will closely engage the tooth groove 40a of the other intermediate gear 40A at a portion other than the relief groove 72a, and Restricts the free rotation of the intermediate gear. In addition, at this time, marking characters, symbols, etc. on the printing surface 24 of the printing wheel 24
a is placed directly above the marking material.

Next, the operation of the above-mentioned type selection device will be described. The rotary drive source 68 of the drive pinion position conversion mechanism 46 is driven to
4. That is, the drive pinion 38 is meshed with a predetermined intermediate gear 40A of the intermediate gear group 42A. Next, when the rotary drive source 34 is driven, the drive pinion 38 rotates, and this rotation causes the intermediate gear 40A and the intermediate gear 40B meshing therewith to rotate. The information is transmitted to the corresponding type wheel 24 via the corresponding type wheel 24, and the predetermined type surface 24a thereof becomes the marking position. At this time, the other type wheel 24 is prevented from moving the type face 24a at the marking position by the rotation prevention plate 72, and the other type wheel 24 is connected to the drive pinion 38 by the drive pinion position conversion mechanism 46, so that the other type wheel 24 is connected to the drive pinion 38 in the same manner. A predetermined typeface 24a is selected. In this way, after selecting the predetermined type faces 24a of all the type wheels 24 and obtaining a predetermined character string, the marking material 18 is fed and the actuator 19 is driven to mark the marking material 18. , actually the rotational drive source 34°68
is controlled by a computer program and can easily obtain a predetermined string of characters at high speed.

(Effects of the Invention) According to the present invention, as described above, by aligning the drive pinion with a predetermined type wheel using the drive pinion position conversion mechanism and driving the spry shaft, it is possible to easily select the type on the type wheel. Moreover, since the intermediate gear makes it difficult for heat from the type wheel to be transmitted to the drive pinion or its position changing mechanism, which requires precision, there is no deterioration in accuracy and durability.

[Brief explanation of drawings]

1 and 2 are a cross-sectional view and a top view of a character selection device of a marking machine according to the present invention. 10-----1 type selection device, 12---11 marking machine, 14-----cradle, 16-----marking material, 18---1 colored tape, 20-- --Type wheel assembly, 24--111 type wheel, 30-----type wheel shaft, 34-111 rotation drive source, 36-----subline shaft, 38-1-- Drive pinion, 42---
--Intermediate steel car group, 44--1--Movable plate. 46---- Drive pinion position conversion mechanism, 72---
-One round IE plate, 72a---One relief groove. 1 m 2tlJ 3Δ

Claims (3)

[Claims] (1) Feeding marking material fed from a material supply source to a marking position between a heated type wheel assembly consisting of a plurality of type wheels rotatably supported on a type wheel shaft and a marking material holder. The type wheel assembly includes a marking material feeding means for press-contacting the marking material through a colored tape to select a predetermined type of the type wheel of the type shaft assembly of the marking machine for marking the marking material. In a type selection device for a marking machine, the drive pinion selectively engages with a spline shaft disposed parallel to the type wheel shaft of the type shaft assembly and connected to a rotational drive source, and the drive pinion selects the type. at least one group of intermediate gears transmitting rotation to each type wheel of the wheel assembly and comprising the same number of intermediate gears as the type wheels and the drive pinion in a rotationally free and axially cooperative manner; 1. A type selection device for a marking machine, comprising a drive pinion position changing mechanism that includes a matching movable plate and moves the movable plate parallel to the spline shaft. (2) The drive pinion, the intermediate gear group, and the type wheel assembly are arranged side by side in the horizontal direction.
A type selection device for a marking machine as described in . (3) The movable plate of the drive pinion position conversion mechanism has an escape groove so that only the intermediate gear that aligns with the drive pinion and meshes with the drive pinion rotates freely, and is not connected to other intermediate gears. 3. The type selection device for a marking machine according to claim 1, further comprising a rotation stopper plate that restrains the free rotation of the other intermediate gear.