JPS6331977Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is an ECR (electronic cash register)
This invention relates to the attachment and detachment of the type wheel of a type wheel selective printing machine that issues receipt paper and the like.

The type wheel selection unit of a conventional type wheel selection type printing press is firmly fixed to the printing press body with screws, E-type retaining rings, nuts, etc., and adjustment and assembly are very complicated.

Therefore, if foreign matter such as paper dust or dirt enters the operating parts and malfunctions, or if you want to replace several types, it will take a considerable amount of time and advanced skill to repair and replace them. It took a while.

The present invention completely improves these shortcomings by making the type wheel selection part one unit.
Since it engages with the main body frame using a bearing and a compression coil spring, it is easy to remove the type wheel selection unit from the main body frame, making it easy to remove paper dust and foreign matter.
Or, it is one that makes replacing the type wheel quick and easy.

Examples of the present invention are shown in FIGS. 1, 2, and 3.
This will be explained using FIG.

This invention relates to a printing machine that issues ECR receipts, etc.
FIG. 4 is a perspective view, a side sectional view, and a plan view of a type wheel selection portion in a type wheel selection type printer.

1 and 2 are the main frame, 3 is a type wheel selection unit, 4 is an FPC (flexible printed circuit board) that has a connector part that contacts the ECR control part, and EPC 4 is a wiring board that is the electrical wiring board of the printing machine. It is soldered to the board 6.
5 is an EPC protection member for protecting the soldering. 7 is a type ring with numbers, symbols, characters, etc. arranged on its outer periphery; 8 is a spline that pivotally supports the type ring 7 and engages with a partial protrusion of the type claw 9 rotatably engaged with the type ring 7; The type wheel set 8 is supported by a subframe 10 via a subframe bearing 11.

Furthermore, a subframe bearing 1 is attached to the type wheel shaft 8.
1, a main body frame bearing 1 for insertion into the main body frames 1 and 2.
3. The main body frame bearing presser 14 is engaged with the transmission gear 15 that transmits rotational force to the type wheel shaft 8. The main body frame bearing 13 has a circular arc shape or a part having a notch in the circular arc shape which is pivotally supported by the main body frames 1 and 2, and a pressing force of the main body frame bearing presser 14 on the side surface of the main body frames 1 and 2. It has a bearing collar to receive the bearing.

In addition, the subframe bearing 11 and the subframe bearing presser 12 are combined to form a type wheel spindle subframe engagement means, and the main body frame bearing 13 and the main body frame bearing presser 14 are combined to form a type wheel spindle main body frame engagement means. .

A type pawl support member 16 is engaged with the type pawl 9 . 17 is an electromagnetic coil for selecting the type wheel 7; 18 is an electromagnetic core; and 19 is an electromagnetic attraction core, which is engaged with the type claw support member 16. The electromagnetic core 18 is caulked to the subframe 10, and the electromagnetic coil 17 is soldered to the wiring board 6. 20 is a guide plate that guides the type wheel 7 in the digit direction; 21 is a detent spring that causes the type wheel 7 to act as a detent; 22 is a guide plate 20
This is a mounting plate to which the detent spring 21 and type claw support member 16 are attached. 23 is printing paper, 24 is a printing roller, 25 is a printing roller support plate, and 26 is a printing drive shaft.

27 and 28 are notches in the main body frame through which the type wheel shaft 8 passes during insertion, and 29 and 30 are main frame bearing insertion holes provided in the main body frames 1 and 2. This main frame bearing insertion hole 29, 30
Except for the portions communicating with the notches 27 and 28, the rest has a circular arc shape or a protrusion formed on a part of the circular arc shape. 31 is a spline portion provided on the type wheel spindle 8; 32 is a hole portion of a subframe bearing holder provided in the subframe bearing holder 12; and 33 is a notch hole portion of the subframe provided in the subframe 10.

The above is the explanation of the configuration.

Next, the operation will be briefly explained. First, the selection operation of the type wheel 7 will be explained.

The printing press motor (not shown) rotates in response to the printing operation start signal, which is transmitted to the transmission gear 15 via the deceleration transmission mechanism, and the type wheel shaft 8 rotates in the direction of the arrow. When the phase of the spline groove of the type wheel spindle 8 and the engagement protrusion of the type claw 9 reaches the desired type position, the electromagnet coil 17 is energized, and the electromagnet attraction iron core 19 and the type claw support member 16 are energized.
moves in the direction of the arrow. Then, the type pawl 9 moves in the direction of the arrow, engages with the splines of the type wheel shaft 8, and rotates in tandem with the type wheel shaft 8. When the desired type is in the printing position, the transmission gear 15 is stopped from rotating. Next, to explain the printing operation, the print drive shaft 26 is stopped, and when the desired type is stopped at the printing position, it starts rotating in the direction of the arrow, and the print roller 24 presses and prints the type through the printing paper 23. Do the following. At this time, the type is coated with ink by an ink roller (not shown).

Next, to explain the reset operation, rotation is given to the transmission gear 15 again, and the type wheel shaft 8 and the type pawl 9 are rotated.
rotates, and the type claw 9 rotates together with the type claw 9 to the engagement position with the type claw support member 16. Type nail support material 16
uses a spring material, and when the electromagnetic coil 17 is energized, it operates in the opposite direction to the arrow and returns to the standby position. When the type claw 9 starts engaging with the type claw support member 16, it rotates in the direction opposite to the arrow and stops at the standby position. The type wheel shaft 8 further rotates and when it reaches the standby position, the motor is de-energized and stops. The above is the operation.

Next, the present invention will be explained in detail. First, a method for removing the type wheel selection unit 3 from the main body frames 1 and 2 will be explained.

1 and 3, the configuration of the type wheel shaft 8 in the thrust direction will be explained. There is a subframe 10 inside the main body frames 1 and 2, and further inside the subframe 10, there are subframe bearings 11,
There are a subframe bearing presser 12, a spline portion 31 of a type wheel shaft 8, and a type wheel 7. Main frame 1,
On the outside of 2, there are a main body frame bearing 13, a main body frame bearing retainer 14, a transmission gear 15, and an E-type retaining ring. First, when removing the main body frame bearing 13
is pulled in the direction of the arrow in FIG. 3, and the compression spring of the main body frame bearing retainer 14 is bent in the compression direction, thereby forming a main body frame in which a protrusion is formed on the arc shape or a part of the arc shape formed on the main body frames 1 and 2. Remove it from the bearing insertion holes 29 and 30. The notches 27 and 28 of the main body frame are slightly wider than the shaft diameter of the type wheel shaft 8, and when they are pulled in the direction of arrow A, the type wheel selection unit 3 is removed in the direction of arrow A. Next, the installation method is the main body frame bearing 1.
3 in the direction of the arrow to position it on the outside of the main body frames 1 and 2, insert the type wheel shaft 8 into the notches 27 and 28 of the main body frame, and insert it into the main frame bearing insertion holes 29 and 30 of the main body frames 1 and 2. When the type wheel shaft 8 of the type wheel selection unit 3 is positioned at the center and the main body frame bearing 13 is released, the main body frame having a protrusion in an arc shape or a part of the arc shape is formed by the spring properties of the main body frame bearing presser 14. The main body frame bearing 13 having a circular arc shape or a notch in a part of the circular arc shape is inserted into the bearing insertion holes 29 and 30, and the collar portion of the bearing 13 is pressed against the side surface of the main body frames 1 and 2, and the main body frame bearing 13 engages with the main body frames 1 and 2.

Next, a method for removing the type wheel shaft 8 and the like from the subframe 10 will be explained with reference to FIG.

When the hole 32 of the subframe bearing holder is hooked with tweezers or the like and pulled upward, a gap is created between the spline part 31 of the type wheel shaft 8 and the subframe 10, and the subframe bearing 11 is moved into the gap using tweezers or the like. let The subframe 10 has a subframe cutout hole 33, the cutout is narrower than the outer diameter of the subframe bearing 11, and the cutout hole 33 is narrower than the outer diameter of the subframe bearing 11.
Of course, the diameter is wider than the shaft diameter of the type wheel shaft 8 from the cutout hole 33 of the subframe 10.
Lift upwards and remove. At this time, the type wheel 7, type pawl 9, subframe bearing 11, main body frame bearing 13, main body frame bearing presser 14, and transmission gear 15 remain set on the type wheel shaft 8.

Next, the installation method is the reverse of the above, and ends by simply pushing the subframe bearing presser 12 into the type wheel shaft 8.

As described above, according to the present invention, the assembly of the type wheel selection unit 3 and the main body frames 1 and 2 has become extremely easy, and furthermore, the print quality due to dirt such as paper dust on the type wheel 7 portion has been improved. In response to deterioration in print quality, the type wheel selection unit 3 can be quickly and easily removed, cleaned with a vacuum cleaner, etc., and reattached, so the print quality can be restored quickly and cleaning can be done with simple knowledge. , high printing quality can be maintained for a long time with simple repairs. Malfunctions due to foreign objects such as dirt, etc.
Even if it is necessary to replace the type wheel 7, it is possible to remove the type wheel selection unit 3 and then remove the type wheel axle 8 from the subframe 10 and replace it, which has the great effect of allowing troubles to be repaired quickly. has.

As mentioned above, according to the present invention, it is possible to fully respond to the diversification of service calls for ECR printing machines, such as replacing type, stabilizing print quality, and repairing malfunctions caused by the inflow of foreign substances such as dirt, etc. A type wheel selection unit for a selection type printing press can be provided.

[Brief explanation of the drawing]

1 and 4 are perspective views showing the attachment and detachment of the type wheel selection unit according to the present invention, and FIG.
FIG. 3 is a side sectional view showing the type wheel selection mechanism and the type wheel printing mechanism, and FIG. 3 is a plan view showing attachment and detachment of the type wheel selection unit. 1 and 2 are main body frames, and 3 is a type wheel selection unit. 7 is a type wheel, 8 is a type wheel shaft, 10 is a subframe, 11 is a subframe bearing, 12 is a subframe bearing presser, 13 is a main body frame bearing,
14 is the main body frame bearing holder, 23 is the printing paper, 2
4 is a printing roller.

Claims (1)

[Scope of utility model registration request] a main body frame, a type ring on the outer periphery of which printed characters such as letters and symbols are arranged, a type wheel shaft that supports the type wheel, a type selection means for selecting the type on the type wheel, the type wheel shaft and the type wheel; a subframe that supports a type selection means and is detachable from the main body frame; a subframe bearing that rotatably attaches the type wheel spindle to the subframe; and a main body frame that rotatably attaches the type wheel spindle to the main body frame. a bearing, the main body frame has a notch through which the type wheel spindle passes, and a bearing insertion hole for rotatably supporting the main body frame bearing such that the type wheel spindle is rotatable; A printer having a cutout portion for rotatably supporting the subframe bearing to rotatably support a type wheel spindle, and in which the subframe can be attached to and detached from the main body frame by inserting and removing the main body frame bearing into the bearing insertion hole.