JPS5831305B2 - 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 small articles, such as small cases, electrical and mechanical parts, and daily necessities.

Conventional printing machines that use three-dimensional objects as printing materials include, for example, a system in which jigs for holding the printing object are attached at regular intervals on a chain conveyor and conveyed to the printing position. When a change occurs, a large number of jigs must be replaced all at once, and even then, there is a drawback that it is not possible to print 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.

Generally speaking, conventional printing machines of this type were manufactured on the premise of intensively printing large quantities of articles of the same size in specialized printing factories, so they could be used as a side job in, for example, electrical component manufacturing factories. It had drawbacks that made it unsuitable for use.

The main object of the present invention is to provide a printing press that prints small and lightweight three-dimensional objects that are easy to carry and suitable for use on a tabletop.

Another object of the present invention is to provide a general-purpose printing machine capable of adapting to changes in the shape and size of the object to be printed, and in which adjustment work for changes in the object is extremely easy. The purpose of the present invention is to provide a printing machine that uses .

Another object of the present invention is to facilitate manufacturing and assembly work, maintenance and repair work, and to prevent deviations in accuracy from occurring even after many years of use.
Another object of the present invention is to provide a printing machine that can easily respond to changes in product specifications, has a structure suitable for mass production on the manufacturer's side, and can print three-dimensional articles.

Still other objects will become apparent from the following description and drawings.

The printing machine of the present invention has a compact structure that is easy to carry, and in particular, the feed pawl that moves a long stroke in the left and right direction to convey the printed material is configured to be pulled back by a spring. In order to prevent the tensile force from fluctuating greatly over the entire stroke, the rod is bent in a substantially U-shape and stretched.

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

FIG. 1 shows an exact 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 is attached to an opening 19 at the top of the main frame 2, and a printing material supplying device block 4 is attached to the bottom of the main frame 2.

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

The means for attaching this block 3 to the main frame 2 is as follows:
A first pin 7 is installed in the lower left corner of the rear panel 6, its front end is passed through a hole in the main frame 2, and a lock nut 8 or a snap ring is used to prevent it from falling off from the main frame. The entire block 3 is held so as to rotate, and on the other hand, a second pin 9 supported at both ends by the front panel 5 and rear panel 6 is provided on the right side, and an adjustment knob 11 is attached to the upper edge 10 of the main frame. The knob is adjustable and suspended from the main frame 2 by a male screw 12 at the lower end of the knob, a member 13 that moves up and down as the male screw rotates, and a link 14 that connects the member 13 and the second pin 9. .

Further, as a means for regulating the position of the block 3 in the front and back direction, stop pins 15, 16, 17, and 18 that protrude rearward are fixed to the four corners of the front panel 5, and the tips of these pins are placed on the front surface of the main frame 2. I'm doing it.

The arrangement of each roll group in printing block 3 is shown in FIG.

The transfer roll 21 for stamping on the printing material M has a first
The color plate roll 22 and the second color plate roll 23 come into contact with each other at different times.

The first color ink comes from the pot 24 and the ink roll 25.
Sequentially, a rotating kneading roll 26, a kneading roll 27 that slides in the axial direction while rotating, and a rotating kneading roll 28.2.
9 and is supplied to the plate on the plate roll 22.

Similarly, the second color ink is applied to the pot 34. The ink is supplied to the plate on the plate roll 23 via an ink roll 35 and a kneading roll 36, 37, 38, 39.

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

FIG. 3 shows a power transmission mechanism related to the printing block 3.

A belt 43 is connected from the motor 41 to the large pulley 42 of the idler shaft.
from the small pulley 44 of the idler shaft to the center gear 4.
A belt 47 is hung around a pulley 46 related to No. 5.

As the idler shaft, as shown in FIG. 2, a shaft 48 protruding toward the rear of the first pin 7 is used.

A combination of a dog pulley 42 and a small pulley 44 is fitted onto this shaft 48 via a ball bearing or the like.

The center gear 45 is disposed at the center of the roller group related to the first color and the roller group related to the second color, and meshes with gears 58, 69 related to the kneading roll 28, 39 and an intermediate gear 54 for driving the ink roll. .

The gears that drive each roll group are in mesh with each other and have an effective diameter equal to the diameter of each roll.

These gear groups include a gear 51 related to the transfer roll 21, a gear 52 related to the first color plate roll 22, a gear 53 related to the second color plate roll, an ink roll 25 for the first color, and a kneading roll 27. 28. Gears 55, 5 related to 29, respectively
7, 58, 59, gears 65.6 for each of the second color ink roll 35 and kneading roll 37°38.39
It is composed of 7.68°69.

The printing material supplying device block 4 includes an article transporting means for moving the printing material at a predetermined timing and a predetermined speed, a guide provided in the left and right directions for regulating the running trajectory of the article, and a guide provided in both the up and down and front and rear directions. and a guide adjustment means for adjusting the position.

An example of article transfer means is shown in FIGS. 4 and 5.

A gear 72 partially missing teeth is fitted to the rear end of the shaft 71 of the transfer roll 21, and a rack 73 that meshes with the toothed portion of the gear 72 is connected to a guide 74 parallel to the article feeding direction.
It is provided so that it can be slid along.

The effective diameter of the partially toothed gear 72 is equal to the outer diameter of the transfer roll 21 .

A spring 75 for pulling back the rack 73 is attached to the right end of the rack 73.

The spring 75 is preferably one that does not increase its tensile force even though the stroke of the rack 73 is long, and preferably has a small spring constant.

For this purpose, a spring with a long length is used.

In order to compactly store this long spring 75 in a mechanical device, one end of the spring 75 is fixed to the rack 73, as shown in FIG. It is stuck to the machine.

An arm 78 hanging below the rack 73 and a rod 79 protruding forward from the lower end of the arm are provided.
A feed claw 80 is attached to the front end of the rack γ3.
Configure it to move with the body.

An adjustable stopper 81 is provided at the right end of the rack stroke to define the return position of the rack.

Now, as shown in the figure, when the rack 73 is pulled back by the spring 75 and is waiting at the position where it touches the stopper 81, when the tip of the gear part of the partially toothed gear 72 engages with the rack, the rack 73 moves to the left. As it advances, the feed claw 80 also advances to the left.

Eventually, when the gear portion of the partially toothed gear 72 reaches its end, the partially toothed gear 72 and the rack disengage, and the rack 73 returns to the right at high speed due to the force of the spring γ5.

One reciprocation of this rack 73 and feed claw 80 is the transfer roll 2
1, and the running speed of the feed claw 80 is equal to the circumferential speed of the transfer roll 21.

Next, the travel guide for the printed article and its position adjustment means will be explained.

As shown in a side view in Fig. 2 and in a plan sectional view in Fig. 6,
Two left and right fixed shafts 84 and 85 projecting forward from the main frame are fixed to the main frame 2, and a box body 86 is inserted and supported by these two fixed shafts.

A front unit 87 and a rear unit 88 are built into the box, and a front guide rail 89 that can be vertically displaced above the front unit 87 is provided, and a rear guide rail 90 is provided above the rear unit 88.

These two kite rails 89 and 90 are located on both sides of the travel line of the feed pawl 80.

The guide rail 89 or 90 may be divided into a lower kite rail 91 or 92 and an upper guide rail 93 or 94, for example.

The lower guide rail 91 or 92 regulates the bottom position of the article M to be printed, and the edge of the upper guide rail 93 or 94 regulates the side surface of the article M.

Unit 87.8 supporting guide rail 89 or 90
8 can be adjusted independently in the vertical direction, and the mutual spacing between both units and the spacing between both units and the main frame can be adjusted independently.

In FIG. 1, a knob 95 is used to adjust the vertical direction of the front guide rail 89, and a knob 96 is used to adjust the vertical direction of the front guide rail 89.
Knob 97 adjusts the distance between both units, that is, the width of both guide rails 89 and 90. Knob 98 adjusts the distance between both units and the main frame, that is, the guide rail 89. This is to adjust the front and back position of the entire .90.

An example of the vertical adjustment mechanism of the front unit 87 is shown in FIG.

Shaft 9 rotatably supported horizontally within the unit
A worm gear 100 is attached to the knob 95, and a worm 101 that meshes with the worm gear 100 is attached to a rotation shaft 102 related to the knob 95.

Further, pinions 103 and 104 are attached to the left and right sides of the shaft 99, and a support rod 105 vertically displaces the rack that engages with the pinions 103 and 104.
The front guide rail 89 is attached to the upper ends of the support rods 105 and 106.

When the knob 95 is turned, the rotating shaft 102 rotates accordingly, and the guide rail 89 moves up and down while being supported horizontally.

With a similar structure, a knob 96 moves the guide rail 90 up and down.

According to this structure, the guide rail does not fall due to the weight of the guide rail and the article.

An example of a mechanism for adjusting the units 87, 88 in the fore-and-aft direction by knobs 97 or 98 is shown in FIG.

The spindle 107 rotates together with the knob 97, but is freely displaceable in the axial direction.A male thread 108 at the tip is fixed to the rear unit 88 and fits into a female thread 109, and is attached to the front unit 87 by two snap rings 110 and 111.
is holding.

Rotation of knob 97 therefore changes the spacing of units 87,88.

The spindle 112 rotates together with the knob 98 but is freely displaceable in the axial direction, and the male thread 113 at the tip is a female thread 114 that is directly or indirectly fixed to the main frame 2.
The front unit 87 is held between the two snap rings 115 and 116.

Since the distance between the units 87 and 88 is kept constant by the spindle 107, the rotation of the knob 98 causes both the units 87 and 88 to be displaced in the front-rear direction.

According to this invention, as illustrated in FIG. 8, even if the cross-sectional shape of the article is asymmetrical, the surface to be printed can be held horizontally.

Further, after first adjusting the width of the guide rail to match the article, the entire guide rail can be adjusted back and forth in accordance with the plate position of the plate rolls 22, 23, making the alignment work easier.

Although offset printing has been described above, the printing apparatus of the present invention can be similarly implemented for letterpress printing and gravure printing.

According to the present invention, a group of printing rolls are mounted together in one block in front of an upright main frame, and an article transfer device and an article guide device are attached together in one block below the main frame, and The spring that pulls back the rack is stretched compactly in a roughly U-shape, making it dramatically smaller and lighter than conventional printers that print three-dimensional objects, making it possible to use it on a tabletop or carry it in your hand. It became.

By the way, in the example, the size is 50 CrrL in width.
1 depth 35CIrL1 height 40crI1. , its weight was about 10 Kp.

Further, according to the present invention, since the guide rail for the printing material and the feed claw for conveying the material are configured separately, even if the shape and dimensions of the article change, only the guide rail needs to be adjusted, and the printing machine can be easily adjusted. It has become easy to continuously supply and take out articles, making it extremely easy for users to use, and it has become possible to reliably synchronize the printing device and the feed pawl with a simple mechanism.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the present invention. FIG. 2 is a side view of FIG. 1. 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 a main part of the article transfer means of the embodiment shown in FIG. FIG. 5 is a perspective view showing the article transfer means of the embodiment shown in FIG. FIG. 6 is a cross-sectional view showing the guide rail adjustment means of the embodiment shown in FIG. FIG. 7 is a perspective view showing the guide rail adjusting means of the embodiment shown in FIG. FIG. 8 is a side view showing an example of how a printed product is supported by the guide rail of the embodiment shown in FIG. 1...Bottom plate, 2...Main frame,
3...Printing block, 4...Goods supply block, 5...Front panel, 6...
Rear panel, 7...1st pin, 9...
・Second pin, 21...Transfer roll, 22...
...First color plate roll, 23...Second color plate roll, 41...Motor, 51...
Gear related to transfer roll, 72... Partially missing tooth gear, 73... Rack, 75... Spring, 78... Arm, 79... ...Rod, 80...Feed claw, 81...Stopper, 87...Front guide unit, 88...
...Rear guide unit, 89...Front guide rail, 90...Rear guide rail, 95...
...Front guide rail up and down adjustment knob, 96...
...Rear guide rail up and down adjustment knob, 97...
・・Knob for adjusting guide rail width, 98 ・・Knob for adjusting guide rail front and back position.

Claims (1)

[Claims] 1. A group of printing rolls such as a kneading roll, a plate roll, and a transfer roll arranged in front of an upright main frame, and a partially toothed part that rotates in synchronization with the final roll that directly contacts the printing material among the printing rolls. a gear; a rack provided below the final roll so as to be slidable in a direction tangential to the rotation of the final roll; and meshed with a gear portion of the partially toothless gear to be slidably displaced in a predetermined direction; a spring that is fixed and bent into a substantially U-shape and whose other end is fixed to the machine, and that when the rack and the partially partially toothed gear are disengaged, pulls the rack back in a direction opposite to the sliding direction; a feed pawl that is provided on the feed pawl to transport the printed product in the predetermined direction; and an article guide member that is provided along the sliding direction of the feed pawl and regulates the transfer locus of the print product; A printing machine that uses a three-dimensional article as a printing material, and is configured such that the transport speed of the printing object is the same as the circumferential speed of the final roll, and the feeding claw slides back and forth in synchronization with the rotation angle of the final roll. .