JPS603996B2 - Barcode printing device for desktop price tag printing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for printing barcodes in a price tag printing machine of the type that is placed on a table and prints sequentially on price tags on a label tape by manually pressing a handle.

As is well known, barcodes display numbers using a combination of parallel pongee lines with two different thicknesses.
When reading such information, printing with higher precision than conventional ink printing is required, and to meet this requirement, thin film carbon ribbons have come to be used as printing media.

An object of the present invention is to create and provide a device that can reliably and clearly print barcodes in a printing section of a tabletop price tag printing machine by using the power of a manual handle that operates in the vertical direction. . To summarize the concept of the present invention, the total length of the long arm at the center of the T-shaped lever can be varied by pivoting the hole raised in the center of the T-shaped lever using a support shaft provided at the center of the underside of the table. At the same time, a reciprocating angular displacement power is input to the free end of one short arm of the lever, the free end of the other short arm of the lever is expanded into a fan shape, and two temporary A fulcrum is set for the long arm, the total length of the long arm is extended at the starting point of the reciprocating angular displacement, and the total length is shortened at the turning point, and a cam follower of different sizes and diameters is attached to the free end of the long arm. Both are attached coaxially, and when the long arm is extended, the Daiyo cam follower contacts the cam and the pressure cylinder is pressed against the plate 8. When the long arm is shortened, the small diameter cam follower contacts the cam and the impression cylinder is moved from the plate 8. The point is that they are spaced apart.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be explained in detail below with reference to figures according to one specific embodiment thereof.

In FIG. 1, "a plurality of barcode printing wheels 5 are attached to a ball S to form a plate cylinder, a label tape 8 is placed directly under the plate cylinder via a carbon ribbon 7, and a stand 9 is placed directly below the plate cylinder. A cutout hole 10 for printing is provided in the portion.

A longitudinally long circular hole 12 is provided in the center of the T-shaped lever 11, and this hole is pivotally supported on a support shaft 13 at the center of the underside of the table.
The central long arm weight a of the lever li is arranged to face forward, and a shaft 14 extending in the front-rear direction is attached to the free end of the lever li. and impression cylinder 17, both of which are rotatably attached in this order. An arc-shaped cam 18 centered on the support shaft 13 is installed directly below the cutout hole 10 in a horizontal direction across it.

On the other hand, one short arm 1 of the T-shaped lever 11
A terminal portion of a power transmission means is connected to the free end portion of 1b.

The driving part of the power transmission means is located in a hand handle 19 shown in FIG. 1, and a fork-shaped transmission plate 21 is provided at the lower end of a power transmission shaft 20 integrated with the handle, and a pin protrudes laterally from the plate. 22 is attached to a good hole 24 provided in one free end 23a of the bell crank lever 23, and the center portion of the bell crank lever 23 is attached to a pin 25 from the frame.
The lower free end 23b is supported by a single lever 26.
The one-character lever is connected to the upper end of the
Its lower end reaches below the stand 9 and is connected to 27 horizontal links, and the terminal part of the IJ link is connected to the free end of one short arm turtle lb of the T-shaped lever holder. .T
The free end of the other short arm 11c of the mold lever 11 is expanded into a fan shape, and the tip edge thereof has a length centered on the support shaft 13 and equal to the angular displacement length of the free end of the arm 11c. A circular arc-shaped notch 28 is provided, and semicircular recesses 29 and 30 of the same size are carved at both ends of the notch, and a temporary support shaft 31 that comes into elastic contact with the recess 29 at the angular displacement starting position is attached to the end of the arm 32. The base end of the arm is supported by a pin 33 provided on the underside of the table 9, and the arm 32 is tensioned by a spring 34.

The effects of the present invention are as follows.

First, the source position is the state shown by the solid line in FIG. 1 and FIG.
, the bell crank lever 23 is angularly displaced to the position shown by the two-dot chain line through the transmission plate 21 and the pin 22, and the link 27 is displaced forward in the horizontal direction via the one-character lever 26 connected thereto. Due to this displacement, a forward angular displacement force is applied to one short arm 11b of the T-shaped lever 11.

When a forward angular displacement force is applied to this short arm tortoise b, the T-shaped lever 11 is first displaced using this temporary support shaft 31 as a fulcrum because the temporary support shaft 31 is in elastic contact with the recess 29. , and the original support shaft 13 is displaced to the rear of the Tachibana circular hole 12 (see FIG. 3).

Due to this minute displacement, the total length of the long arm 1 of the T-shaped lever 11 increases by the amount of the displacement, and the Oyo cam follower 1
6 contacts the surface of the cam 18.

Since the diameter of the large-diameter cam follower is larger than that of the small-diameter cam follower 15, the impression cylinder 17 is pulled up toward the plate cylinder by that amount. is brought into pressure contact with the lower surface of the barcode character 5 on the printing cylinder. As the short arm 11b is angularly displaced forward while maintaining the pressure of the impression cylinder, the pressure 8 and 17 are guided by the cam 18 as shown in FIGS. 2 and 3. The lower surface of the character 5 is rotated and contacted in the lateral direction, and printing is completed.

When the push-down handle 19 reaches the lower limit position, the forward angular displacement force acting on one of the short arms - turtle b of the T-shaped lever 11 disappears, while being guided by the arcuate notch 28 of the other short arm 11c. The temporary support shaft 31 is brought into elastic contact within the front recess 30 (see FIG. 4).

Under the condition shown in FIG. 4, when the load of the forward displacement force of the link 27 disappears and the return displacement is started by the force of the return spring 35, the temporary support shaft 31 is recessed at the position of the other short arm. Since the free end of 11c is temporarily retained,
The original support shaft 13 comes into contact with the front part of the bottle circular hole 12 (see Fig. 4), and the total length of the long arm 11a is shortened, so that the contact with the cam 18 changes from the large diameter cam follower 16 to the small diameter cam follower 15. The peripheral surface of the impression cylinder 17 separates from the plate cylinder, and returns to its original position while maintaining the separation (
(See FIG. 1) Barcodes are sequentially printed on the labels of the label tape 8 by repeating the above operations.

Since the present invention has the above-described structure and operation, the impression cylinder 17 is moved in the printing theory 5 by using the vertical power that pushes down the hand handle 19 against the force of the spring 35. Since the pressure contact plate 17 can be pressed against the lower surface and automatically and reliably separated from the lower surface of the printing wheel 5 on the return path of its displacement, barcodes can be printed clearly and sequentially on the label tape using the carbon ribbon. It became so.

[Brief explanation of the drawing]

The drawings illustrate a specific embodiment of the invention. Figure 1 is a vertical sectional side view taken along the line 1-1 in Figure 2, and Figure 2 and below are all bottom views of Figure 1, of which Figure 2 is in the original position and Figure 3 is during printing. FIG. 4 shows a state in which printing is completed and the state is about to return. 5... Barcode printing wheel, 6... Shaft, 7... Carbon ribbon, 8... Label tape, 9... Stand, 10...
... Cutout hole, 11 ... T-shaped lever, 11a
...Long arm, 11b...One short arm, 11c...Other short arm, 12...
...Machine hole, 13...Spindle, 14...
・Axis, 15......Small strength mufuoroi, 16......Great camouflage, 17...Pressure 8 same, 18...
・Circular cam, 27...Power transmission link, 28
......Circular notch, 29 and 30...Semicircular recess, 31...Temporary support shaft, 34...Spring. Figure 2 Figure 1 Figure 3 Connection diagram

Claims (1)

[Scope of Claims] 1. A label tape is arranged via a carbon ribbon directly under a printing cylinder consisting of a plurality of barcode printing wheels, and a cutout hole for printing is made in a part of the base directly below the plate cylinder, and a cutout hole is made for printing in the center of the T-shaped lever. A long circular hole is provided in the front and rear directions, and the circular hole is pivotally supported on a support shaft in the center of the underside of the table. A small-diameter cam follower, a large-diameter cam follower, and an impression cylinder are attached to the shaft in order from the front so that they can rotate freely, and an arc-shaped cam centered on the support shaft is attached to the shaft. It is installed in the horizontal direction directly below and across the cutout hole, and on the other hand, the vertical reciprocating displacement power by the hand handle is converted into the horizontal reciprocating displacement in the front and back, and is input to the free end of one of the short arms of the lever. furthermore, the free end of the other short arm of the lever is expanded into a fan shape, and the free end of the other short arm of the lever is centered on the support shaft, and the other short arm is free An arc-shaped notch with a length equal to the angular displacement length of the end is provided, a semicircular recess of the same size is cut on both ends of the notch, and the notch is elastically contacted in the rear recess at the angular displacement starting position. A temporary support shaft is provided which is elastically contacted in the recess at the front at the angular displacement turning position, and when the impression cylinder starts operating, the entire length of the central long arm of the lever is reduced by the action of the temporary support shaft and the circular hole. increases, the large-diameter cam follower contacts the cam, the impression cylinder presses against the plate cylinder, and this condition continues as long as a tensile force is applied to the free end of one of the short arms of the lever. At the time of reversal when the tensile force load on the free end of the arm is eliminated, the action of the temporary support shaft and the circular hole is activated again, and the overall length of the long arm at the center of the lever is shortened, and the small-diameter cam follower comes into contact with the cam, and the impression cylinder 1. A barcode printing device for a tabletop price tag printing machine, characterized in that the impression cylinder is returned to its original position after being in non-contact with the plate cylinder, and the non-contact state is continued until the impression cylinder returns to its original position.