JPS6234777Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power transmission mechanism for a single-piece printing machine, and more particularly, to a power transmission mechanism for a single-piece printing machine that allows the printing head and the like to stop at a fixed position when the printing machine is stopped.

Single-piece printing machines are used to print list prices on price tags attached to items such as clothing.

Price tags and the like that are printed by this type of printing machine are small and relatively thick single pieces, so the single pieces may warp. In addition, a thin string for attaching to clothing is usually attached in advance before printing. Furthermore, since it is printing a list price, etc., it is often necessary to print on a relatively small amount of single pieces of various sizes. For this reason, special measures are required for the feeding mechanism and the like.

First, the basic configuration of a single-piece printing machine proposed by the inventor of the present invention will be explained with reference to FIG.

A plate holder 1 is provided with a hopper 2, and the hopper 2 accommodates a large number of single pieces 3 such as price tags. The hopper 2 consists of a positioning member 2a, a bottom plate 2b, and a rear presser plate 28. The single piece 3 is pushed up from below by the bottom plate 2b, and the positioning member 2a from above
It is positioned by From the rear, the single piece 3 is held down by a rear holding plate 28 for regulating displacement. Among the single pieces housed in the hopper 2, the uppermost single piece 3a is sent to the plate holder 1 via the hopper gate 5 by the single piece feed claw 4. The hopper gate 5 prevents the feeding of two single pieces 3. Above the plate holder 1, there is provided a print head 6 that moves up and down with respect to the plate holder 1, and an ink tray 7 that moves forward and backward into the movement space of the print head 6 for each print. The print head 6 transmits the rotation of the motor to an output shaft via a gearbox, clutch, etc., and is moved up and down under the control of a disc-shaped control cam provided on the output shaft.
The printing head 6 is loaded with a cheese box for holding rubber type and the like. Similarly, the ink tray 7 is moved left and right by controlling the output of the motor with a control cam and via a link mechanism. The printed single piece 3a is accommodated in the single piece receiving device 8.

Next, the operation of the single-piece printing machine described above will be explained. The single piece 3a in the uppermost position is conveyed to the plate holder 1 by the feed claw 4, and is ready for printing (FIG. 1a).

The ink tray 7 advances into the moving area of the print head 6,
The characters in the check box of the printing head 6 are brought into contact with the ink tray 7, and so-called inking is performed (FIG. 1b).

When the ink tray 7 is retracted, the print head 6
is lowered and the single piece 3 placed on the plate holder 1
A is printed (FIG. 1c).

When printing is completed, the printing head 6 is raised and the single piece 3b to be printed next is sent by the feed claw 4, and the printed single piece 3a is pushed by the single piece 3b and stored in the single piece receiving device 8. (Fig. 1d).

In such a single-piece printing machine, the rotation of the motor is controlled by a control cam to drive the print head 6, ink tray 7, and feed pawl 4. For this reason, even after the drive system is turned off, the position of the grooved cam that controls the print head, etc., ends is uncertain, and the print head remains down and stops, causing problems such as not being able to take out the final single piece. There was an inconvenience and a possibility that the final single piece would be printed twice. In a printing machine equipped with a mechanism for sending out the final single piece, there is a risk that the plate holder 1 will be blank-printed, and the printing surface of the plate holder 1 will be printed, thereby staining the back side of the single piece to be printed next time.

Also, if the transmission system is decelerated by a worm wheel, etc., the motor rotation speed will be approximately 80% of the rotation speed when the power frequency is 60Hz when the power frequency is 50Hz.
It is necessary to devise a transmission mechanism that can provide the best constant rotation speed at low cost even if the power supply frequency changes.

Furthermore, it would be convenient if there was a problem with the transmission system, allowing manual drive.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a drive device for a single-piece printing machine which allows the printing head etc. to always stop at a fixed initial position and which can also be operated manually.

In order to achieve the above object, the power transmission mechanism of the single-piece printing machine according to the present invention includes a main shaft for driving the printing section of the single-piece printing machine, a clutch disk fixed to the main shaft, and a clutch disk rotatable to the main shaft. The rotational force from the drive motor is transmitted to the
a spline wheel having clutch grooves at regular intervals on its outer periphery; and a release section rotatably supported on the clutch disk, biased in a direction to engage the clutch groove of the spline wheel, and releasing the engagement. a clutch lever that is pivotally supported to swing in the direction of the main shaft and that is inclined in a rotation range of the release portion of the clutch pawl and engaged with the release portion when the clutch disk rotates; , a power transmission mechanism for a single-piece printing machine including an electromagnetic device that biases the clutch lever to disengage from the clutch pawl; The printer is configured so that the printing section and the like can be driven manually.

According to the above structure, the object of the present invention can be completely achieved.

Hereinafter, the present invention will be explained in more detail with reference to the drawings and the like.

2 and 3 are a plan view and a front view showing an embodiment of the power transmission mechanism of a single-piece printing machine according to the present invention,
FIG. 4 is an exploded perspective view showing an embodiment of the drive section of the power transmission mechanism for a single-piece printing machine according to the present invention, and FIG. 5 shows an embodiment of the tension section of the power transmission mechanism for a single-piece printing machine according to the present invention. FIG. 6 is an exploded perspective view showing an embodiment of the main shaft portion of the power transmission mechanism of the single-piece printing machine according to the present invention, and FIG. 7 is a developed perspective view of the power transmission mechanism of the single-piece printing machine according to the present invention. FIG. 8 is an exploded perspective view showing an embodiment of the lever part, FIG. 8 is an exploded perspective view showing an embodiment of the clutch part of the power transmission mechanism of a single-piece printing machine according to the present invention, and FIG. 9 is a diagram showing a single-piece printing machine according to the present invention. FIG. 3 is a view taken along line A-A of FIG. 3 of the clutch portion of the power transmission mechanism of the machine;

First, the driving section will be explained with reference to FIG.

A speed reducer 12 is provided on the output shaft of the motor 11 to reduce the output of the motor 11 and reduce the speed of the output shaft 12.
Output from a. The decelerator 12 is connected to the bracket 13
The bracket 13 is supported by the output shaft 12.
A round hole 13a into which a is inserted is provided. Screws 14 are inserted into the decelerator 12 at four locations, and are fixed with nuts 16 via flat washers 15. A wheel 17 of the output shaft 12a of the decelerator 12 is fixed by a set screw 18. foil 1
7 is provided with a gear portion 17a on which a chain 19 is engaged. The number of teeth of the gear part 17a is based on the power supply frequency (50
Hz, 60Hz) are available, and can be easily replaced using the set screw 18. The chain 19 is hung on a gear portion of a spline wheel 36, which will be described later, and a tension portion is provided in the middle thereof.

The tension section will be explained with reference to FIG.

The tension portion is provided to apply appropriate tension to the chain 19 when the pulley 17 is replaced depending on the number of teeth of the gear portion 17a. The bracket 24 is provided at a fixed portion, and is provided with a slot 24a through which the idling shaft 23 can move up and down. Chain 19 is attached to the idling shaft 23.
An idling wheel 22 having a gear portion 22a that meshes with the idling wheel 22 is rotatably provided, and is stopped by an E-shaped retaining ring 21. A sliding part 23a is provided at the rear of the idling shaft 23 to be inserted into a slot 24a, and after being inserted into the slot 24a, it is fixed to a threaded part 23b provided at the rear end with a nut 26 via a spacer 25. ing. Appropriate tension can be easily applied to the chain 19 by loosening the nut 26 and moving the idling shaft 23 up and down.

Next, the main shaft portion will be explained mainly with reference to FIGS. 2, 3, and 6.

The main shaft 31 has bearings 32, 32 provided in the fixed part.
is rotatably provided via bearings 33, 33. The main shaft 31 has a collar 3 in the axial direction.
4. Spline foil 36 via spacer 35
is inserted.

The spline wheel 36 is provided with a gear portion 36a that meshes with the chain 19, and a metal 37 is inserted between the spline wheel 36 and the main shaft 31, and is rotatably provided with respect to the main shaft 31. Spline foil 3
The foil portion 6 is provided with a groove portion 36b that engages with a key portion 65b of a claw 65, which will be described later.

A disk 38 is further inserted into the main shaft 31 on the groove side of the spline wheel 36 with a spacer 35 interposed therebetween. The disk 38 is fixed to the main shaft 31 with two setscrews 39. A pin 31a is fitted into one end of the main shaft 31 (left end in FIG. 3), and the main shaft 31 can be rotated from the outside by a manual handle indicated by a broken line in the figure.

A keyway 3 is provided on the outside of the bearing 32 at the other end of the main shaft 31.
1b, a groove cam 44 is inserted into the key groove 31b via a spacer 43, and the key 4
5, and an E-shaped retaining ring 46 prevents it from coming off in the axial direction. A groove 44a for controlling the vertical movement of the print head 6 is provided on the outside of the grooved cam 44, and a follower 47 is fitted into the groove 44a.
A feeding claw 4 and an ink tray 7 are provided inside the grooved cam 44.
A groove 44b is provided for controlling the movement of the groove 44b.
A follower 48 is fitted into the.

The lever portion will be explained with reference to FIGS. 3 and 7.

The lever 51 has bent portions 51a, 51a, and is rotatably mounted on a shaft 53 which is fixed to two brackets 52, 52 provided on a fixed portion. A connecting piece 50 is fixed to the lower end of the lever 51, and is connected to a plunger 56 of the solenoid 49 by a link member 55. Connection piece 50
A spring 54 is connected between the
is stretched, and biases the lever 51 in the counterclockwise direction in FIG. 3 about the shaft 53. When the solenoid 49 is energized, the plunger 56 moves to the left, and the lever 51 rotates clockwise about the shaft 53.

Next, the clutch portion will be explained with reference to FIGS. 2, 3, 8 and 9.

An arm 61 is provided on the disk 38 so as to be rotatable about a shaft 62 . The rear end of the arm 61 is bent, and a spring 64 is inserted between the bent part and a protrusion 63 provided on the disk 38.
is applied, urging the arm 61 clockwise in FIG. On the same surface of the disk 38, a pawl 65 is rotatably provided on a shaft 66. The pawl 65 is provided with a bent portion 65a and a key portion 65b, and the tip of the lever 61, which is given the ability to rotate clockwise in FIG. When the key part 65b is rotated counterclockwise in FIG.
6b. At this time, the clutch lever 51
is biased counterclockwise in FIG. 3 by the spring 54, so that the bent portion 65a can engage the lever 51 when the disk 38 rotates.

That is, when the solenoid 49 is not energized, the lever 51 is biased by the spring 54 and tilted, so the claw 65 is moved around the shaft 66 by the bending portion 65a and the tip of the lever 51 coming into contact with each other. Rotate clockwise, key part 65b and spline foil 3
The groove portions 36b of No. 6 are engaged.

On the other hand, when the solenoid 49 is energized, the lever 51 rotates to the upright position, and the bending portion 65a and the tip of the lever 51 are released from contact, so that the claw 65 is rotated around the shaft 66 by the spring 64 and the arm 61. The key part 65b and the spline foil 3 are rotated counterclockwise by
No. 6 groove 36b is engaged.

Next, the operation of the power transmission mechanism of the single-piece printing machine according to the present invention will be explained.

When the power switch is turned on, the motor 11 rotates, and the chain 19 hooked on the wheel 17 rotates the idling wheel 22 and the spline wheel 36.

Before the start button is pressed, the solenoid 49 is not energized, so the lever 51 is tilted toward the disk 38 by the spring 54. For this reason, the claw 65
The bent portion 65a abuts on the lever 51, and the key portion 65
At b, the arm 61 of the disc 38 overcomes the force pushing up the pawl 65 and separates from the groove 36b of the spline wheel 36, and the clutch is disengaged. Since the clutch is disengaged, the metal 37 caulked to the spline wheel 36 and the main shaft 31 rotate idly, and the main shaft 31 does not rotate.

When the start button is pressed, the current self-maintained by the relay flows through the solenoid 49. solenoid 49
When energized, the lever 51 moves away from the disk 38 and becomes vertical. Bent portion 65a of claw 65
is separated from the lever 51, and the key portion 65b of the pawl 65 comes into contact with the spline foil 36 due to the force of the arm 61 of the disk 38 pushing up the pawl 65. Since the spline wheel 36 is driven by the chain 19, the key portion 65b is driven by the spline wheel 36.
It engages with the groove portion 36b of.

In this way, the rotation of the motor 11 is controlled by the chain 19.
is transmitted to the spline wheel 36 via the groove 36b and the key portion 65b of the pawl 65 engages, whereby the disk 3 on which the fulcrum shaft of the pawl 65 is provided
8 rotates, and the main shaft 31, which is integrally fixed to the disk 38 with a set screw 39, rotates.

There are two ways to stop the printing machine: manual stop and automatic stop when the end of single-piece feed is detected.

In the former manual stop method, when the stop button is pressed, the current self-held by the relay is cut off, and the solenoid is de-energized.

In the latter method of automatic stop upon detection of the end of single piece delivery, a micro switch is activated upon detection of the end of single piece delivery, the current self-held by the relay is cut off, and the solenoid is de-energized.

When the solenoid is deenergized, the lever 51 is tilted toward the disk 38 by the spring 54. As a result, the bent portion 65a of the pawl 65 comes into contact with the lever 51, and the key portion 65b overcomes the force of the arm 61 of the disk 38 pushing up the pawl 65, leaving the groove portion 36b of the spline wheel 36, and the clutch is disengaged. A circular grooved cam 44 provided on the main shaft 31
One rotation of the main shaft 31 causes one movement of the printing head, etc., but no matter where the bending part 65b of the pawl 65 provided on the disk 38 is at during one rotation when the stop button is pressed, the printing head etc. will not fold. The clutch mechanism is released only when the bent portion 65b rotates to the lever 51 position. Therefore, by making this position coincide with the initial position of the printing head, etc., the printing machine can always be stopped at its initial position.

For manual operation, turn off the power switch and turn off motor 1.
Stop 1. Insert the manual handle into the pin 31a of the main shaft 31. When the clutch manual switch is depressed to energize solenoid 49 and lever 51 is placed in the vertical position, the manual handle can be rotated to the right or left. energize solenoid 49 and lever 5
1 in the vertical position is simply to disengage the lever 51 and pawl 65 and allow the main shaft 31 to rotate freely, not to actively bring the clutch into the connected state. Since the main shaft 31 is directly rotated instead of being driven through a clutch, rotation in the opposite direction is possible even if the solenoid 49 cannot be energized.

As explained in detail above, according to the present invention,
The clutch mechanism allows the printing head to stop at a fixed position, i.e., at a position where printing is completed and the type is further away from the monolith when stopped. This makes it easier to take out printed single pieces.

In a device that is also equipped with a single piece feed end detection mechanism, it is no longer possible to print blankly, that is, to print when there is no single piece on the plate holder.

In addition, during manual drive, the main shaft is directly rotated, rather than being driven via a clutch.
Manual operation is now possible regardless of clutch failure.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining the basic configuration of a single-piece printing machine, FIGS. Fig. 4 is an exploded perspective view showing an embodiment of the drive section of the power transmission mechanism of the single-piece printing machine according to the present invention, and Fig. 5 shows an embodiment of the tension section of the power transmission mechanism of the single-piece printing machine according to the invention. Expanded perspective view, No. 6
The figure is an exploded perspective view showing an embodiment of the main shaft part of the power transmission mechanism of the single-piece printing machine according to the present invention, and FIG. 7 is an exploded view showing an embodiment of the lever part of the power transmission mechanism of the single-piece printing machine according to the invention. FIG. 8 is an exploded perspective view showing an embodiment of the clutch portion of the power transmission mechanism for a single-piece printing machine according to the present invention, and FIG. 9 shows a clutch portion of the power transmission mechanism for a single-piece printing machine according to the present invention. Figure 3A of
-A view. DESCRIPTION OF SYMBOLS 1... Plate holder, 2... Hopper, 2a... Positioning member, 2b... Bottom plate, 21a... Recessed part, 28...
... Rear presser plate, 2c... Spring, 3... Single piece, 4...
...Feed claw, 4a...hanging part, 4b...first guide side, 4c...second guide side, 4d...relief groove, 5...hopper gate, 6...printing head, 7
... Ink tray, 8 ... Single piece receiving device, 9 ... Detection lever, 11 ... Motor, 12 ... Decelerator, 13
...Bracket, 14...Screw, 15...Flat washer, 16...Nut, 17...Foil, 18...
... Set screw, 19 ... Chain, 21 ... E-type retaining ring, 22 ... Idling foil, 23 ... Idling shaft, 24 ... Bracket, 25 ... Spacer, 26 ... Nut, 31 ... Main shaft, 32 …
... bearing, 33 ... bearing, 34 ... collar,
35...Spacer, 36...Spline foil,
37...Metal, 38...Disc, 39...Set screw, 42...Bearing, 43...Spacer, 44
... Groove cam, 45 ... Key, 46 ... E-type retaining ring, 47, 48 ... Follower, 49 ... Solenoid, 51 ... Lever, 52 ... Bracket, 53
...Axis, 61...Arm, 62...Axis, 63...
Protrusion, 64...spring, 65...claw.

Claims (1)

[Scope of utility model registration request] A main shaft that drives the printing section of a single-piece printing machine, a clutch disk fixed to the main shaft, and a clutch disk that is rotatably supported by the main shaft and transmits the rotational force from the drive motor. a spline wheel having a clutch groove, and a clutch pawl rotatably supported on the clutch disk, biased in a direction to engage the clutch groove of the spline wheel, and having a release portion for releasing the engagement. and is pivotally supported to swing in the direction of the main axis,
a clutch lever that is inclined to a rotation range of the release portion of the clutch pawl when the clutch disk rotates and engages with the release portion; and a clutch lever that is biased to disengage from the clutch pawl. A power transmission mechanism for a single-piece printing machine including an electromagnetic device, characterized in that an engaging part for attaching and detaching a manual handle is provided at one end of the main shaft, so that the printing part etc. can be manually driven. Power transmission mechanism of single-sided printing machine.