JPS5831307B2 - Printing machine that prints on three-dimensional objects - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small printing machine that prints on various containers, various electrical and mechanical parts, and various other small articles.

Conventional printing machines of this type, for example, have a method in which holding jigs for the printed material are attached at regular intervals on a chain conveyor and transported to the printing position, but this not only increases the size of the transport device itself, but also However, there are disadvantages in that the printing position varies due to variations in the mounting position of the jig and the pitch tolerance of the chain, and furthermore, the printing position shifts due to changes in the chain pitch over time.

Furthermore, when the shape and dimensions of the printing material change, it is necessary to replace a large number of jigs, and even then, there is a drawback that printing cannot be performed on articles that do not fit the previously prepared jigs.

In addition, conventional printing machines of this type were manufactured to be installed on the floor, and the printing position was usually designed at the worker's waist or chest height, making the entire machine large and heavy.
Moreover, it had the disadvantage of being expensive.

The purpose of the present invention is to provide a small and lightweight printing machine that is easy to carry and can be installed on a tabletop, while also being able to always print in a predetermined position with high precision, regardless of the shape and size of the printed product. The objective is to provide a general-purpose, small-sized stamp @j machine.

The characteristics of the present invention are that a group of printing rolls is provided in front of the main frame, and a guide rail for guiding the printing material is provided below the last roll that comes into direct contact with the printing material among the printing roll group. A partially notched gear fitted to the rotating shaft of the final roll is engaged with a rack that is slidably provided along the guide rail, and this engagement causes the rack to slide in the tangential direction of the rotation of the final roll. At the same time, a spring is provided to pull the rack in the opposite direction when the mesh is released, and the rack is reciprocated in synchronization with the rotation angle of the final roll. The printed product is transported along the guide rail at the same speed as the peripheral speed of the final roll.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a front view of an embodiment of the present invention, and FIG. 2 shows a side view thereof.

A main frame 2 stands upright perpendicular to the bottom plate 1, a printing device block 3 forming a first block is attached to an opening 19 at the top of the main frame 2, and a second block forming a second block at the bottom of the main frame 2. A printing substrate supplying device block 4 is attached thereto.

As shown in FIG. 2, the printing device block 3 includes several rotating shaft groups pivotally supported by a front panel 5 and a rear panel 6, and each roll group fitted on the front surface of the front panel 5 of these shafts. It consists of a gear mechanism installed between the two panels.

The means for attaching this block 3 to the main frame 3 is as follows:
A first pin 7 that serves as a fixed support point is provided at the lower left corner of the panels 5 and 6, and the entire block 3 is held so as to rotate around this pin, and the right side of the panels 5 and 6 serves as a movable support point. A second pin 9 is provided, and this pin 9 is connected to the main frame 2.
Adjustable mounting is provided by an adjustment knob 11 provided on the upper edge 10, a male thread 12 at the lower end of the knob, a member 13 that pairs with the male thread, and a link 14 that connects this member with the second pin 9. ing.

Further, stop pins 15, 16, 17 degrees 18 are provided that project rearward from the four corners of the front panel 5, and the tips of these pins are brought into contact with the front surface of the main frame 2 to define the front-rear position.

The arrangement of each printing roll group on the front side of the front panel 5 will now be described.

The embodiment shows a two-color printing device, in which the transfer roll 21
contact the first color plate roll 22 and the second color plate roll 23 at different times in order to imprint the contents on the printing material M.

The first color ink comes from the pot 24 and the ink roll 25.
The ink of the second color is supplied sequentially through the mixing rolls 26, 27, 28, and 29, and in the same way, the second color ink is fed through the fountain 34, the ink roll 35, and the mixing rolls 36, 37, 38, and 39.

Each roll can be removed by removing the screw or snap ring at the tip of the roll shaft and pulling it forward.

Figure 3 shows the power transmission mechanism.

A pulley 46 related to the center shaft is driven via a motor 41, a pulley 42, and a pulley 44, and gears 51, 52, 53, 55, and 55, related to each roll are driven from a center gear 45 provided on the center shaft and an intermediate gear 54 that meshes with the center gear 45. 57,
58, 59, 65, 67.68°69.

The gears associated with each of these rolls are in mesh with each other and have an effective diameter equal to the diameter of each roll.

The printing material supply device block 4 includes an article transporting means for moving the printing material at a predetermined timing and a predetermined speed, a guide rail for regulating the running trajectory of the article, and a guide adjustment means for adjusting the support position of the guide rail. It is composed of.

FIG. 4 shows the main parts of the article transfer means.

Missing tooth gear 7 that continuously lacks teeth in a portion of the entire circumference
2 is fitted onto the shaft 71 of the transfer roll 21, and the partially toothed gear 7
A rack member 73 with a rack 83 carved thereon that meshes with the teeth of No. 2.
is provided slidably along the guide 74, and the spring 75
The adjustable stopper 81 is fixed in order to constantly pull the rack member 73 and define the right end return position of the rack member 83.

Further, as shown in FIG. 5, a rod 79 projecting forward is provided at the lower end of the arm 78 integral with the rack member 73, and a feed pawl 80 is attached to the front end of the rod 79.

When the rack 83 and the feed pawl 80 are directly connected in this way, the effective diameter of the gear of the partially toothed gear 72 and the outer diameter of the transfer roll 21 are made equal, and the running speed of the feed pawl 80 is adjusted to the transfer roll 21.
equal to the circumferential speed of 1.

The spring 75 is preferably one in which the tensile force does not increase even though the stroke of the rack 73 is long, and therefore a spring with a small spring constant and a long spring length is used.

To support this long spring, rollers 76,77
is used to wrap it around from the right side to the bottom of the machine.

A mainspring may be used instead of this spring.

Now, as shown in the figure, when the rack member 73 is in the standby position at the right end, when the transfer roll 21 rotates and the teeth of the partially toothed gear 72 mesh with the rack, the rack member 73 moves to the left, that is, the transfer roll 21 When the gear portion of the partially toothed gear 72 reaches its end, it is disengaged from the rack and returned to the right at high speed by the force of the spring 75.

The feed pawl 80 reciprocates together with the rack member 73.

Two guide rails 89 and 90 are provided on both sides of the travel path of the feed claw 80 to place the printing material M and to regulate the direction of transport thereof, and these guide rails are disposed on the front surface of the box body 86. By rotating the knobs 95°, 96, 97, and 98, the vertical direction, width, and overall longitudinal position can be adjusted independently of each other.

The feeding claw 80 is located at the two guide rails 89.9.
Not limited to those provided in the middle of 0, as shown in Figure 6,
It can also be configured to pass above the rear guide rail 90.

Although offset printing has been described above, letterpress printing and gravure printing using the printing apparatus of the present invention can be carried out in the same manner.

According to the present invention, a group of printing rolls are mounted together in one block in front of a main frame, and a guide rail for guiding a printed product and an article transfer device are arranged below the group, and the article transfer device This is achieved by a feed pawl that reciprocates in synchronization with the rotation of the printing roll, making the device much simpler, smaller and lighter than conventional printing presses that print three-dimensional objects, and can be used on desktop machines. It is now possible to use it in the car and carry it in your hand.

By the way, in the example, the size is 50 cIrL in width.
1 depth 357m.

Its height was 4 Q (m) and its weight was approximately 10 kg.

In addition, as seen in the conventional example, in which clamping jigs for printed materials are attached at appropriate intervals on the chain conveyor,
Although variations in printing positions were unavoidable due to variations in mounting positions of each jig and accumulation of chain pitch tolerances, according to the present invention, it is possible to accurately stamp at a predetermined position every time.

Furthermore, in the present invention, since the guide rail for the printing material and the feed pawl drive mechanism for conveying the article are configured separately, even if the shape and dimensions of the article change, only the guide rail needs to be adjusted. The compact size is extremely easy to use for the user, eliminating complicated tasks such as replacing tools, and simply supplying the items onto the guide rail and taking them out from the guide rail, making it easy to automate the process. I was able to get a printing machine.

Therefore, it will greatly contribute to the rationalization of electrical, mechanical, and other manufacturing industries that involve printing processes.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the present invention. 2 is a partially cutaway side view of FIG. 1; FIG. FIG. 3 is a diagram showing a power transmission mechanism for the printing roll group of the embodiment shown in FIG. FIG. 4 is a diagram showing essential parts of the article transfer mechanism of the embodiment shown in FIG. FIG. 5 is a perspective view showing the article transfer mechanism of the embodiment shown in FIG. FIG. 6 is a perspective view showing another embodiment of the article transfer mechanism of the present invention. 1...Bottom plate, 2...Main frame,
5... Front panel, 21... Transfer roll, 22... First color plate roll, 23...
...Second color plate roll, 26-29...Kneading roll for first color, 36-39...Kneading roll for second color, 71...Transfer roll Axis, 72...
- Missing tooth gear, 73... Rack member, 74...
... Guide, 75 ... Spring, 78 ...
...Arm, 79...Rod, 80...
...Feed claw, 81...Stopper, 89...
...Front guide rail, 90...Rear guide rail.

Claims (1)

[Claims] 1 A group of printing rolls such as a kneading roll, a printing roll, and a transfer roll are arranged in front of the main frame, and the printing roll is applied along a predetermined trajectory passing below the final roll that directly contacts the printing material among the printing rolls. a guide rail that guides the printed product; a partially notched gear fitted to the rotating shaft related to the final roll; and a partially notched gear that is slidably provided along the guide rail and meshes with the partially notched gear to move the final roll. a rack that slides in a tangential direction of the rotation during rotation; a spring that pulls the rack back in a direction opposite to the sliding direction when the rack and the partially toothed gear are disengaged; and a spring that is integral with the rack. A three-dimensional article having a feed pawl formed in the shape of a cylindrical body, and configured such that the forward speed of the feed pawl is the same as the circumferential speed of the final roll and reciprocates in synchronization with the rotation angle of the final roll. Printing machine for printing.