JPH061819Y2 - Double-sided printing machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention applies printing to both sides of a deformable and bulky article made of a flat bag made of a material such as plastic film or cloth. The present invention relates to a printing device for applying.

[Conventional technology]

A conventional printing machine for printing letters, marks, images, etc. on the surface of an article in the state of flatly folding a bag made of plastic film or cloth is a sandwiching means attached to a pair of left and right endless conveyors. Thus, printing is performed by a plate roller coated with ink while the tip of the article is clamped and moved.

[Problems to be solved by the invention]

A printing machine for bulky articles that are easily deformed, such as a folded bag, cannot perform the method of printing by winding one sheet of paper around the plate cylinder, so when printing on both sides, print on one side. It is very troublesome and inefficient because it is necessary to turn over the article and supply the unprinted part to the printing machine again with the unprinted part facing up. To improve efficiency, if two printing machines are used, it is a wide facility. There was a problem that the area was required.

[Means for solving problems]

In order to solve the above-mentioned problem, the present invention constructs a conveying path composed of an upper horizontal portion, a lower horizontal portion, an ascending slope portion and a descending slope portion by a pair of left and right endless conveyors arranged in parallel with each other, Driving means for driving the left and right endless conveyors is provided so as to go from the ascending slope portion of the road to the upper horizontal portion and from the downward slope portion to the lower horizontal portion,
In front of the lower part of the ascending slope part, provided is an article supply means for taking out the stacked articles one by one from the upper part and advancing the front edge thereof to above the slope part, and between the left and right endless conveyors, A plurality of articles comprising a strip-shaped receiving plate that receives the front edge of the article supplied from the article supply means, and a pressing member that presses the front edge of the article on the receiving plate onto the strip-shaped receiving plate to sandwich the article Clamping means are provided at regular intervals, and the upper horizontal portion and the lower horizontal portion are respectively provided with printing machines for printing on the upper surface of articles passing through these horizontal portions, and the ascending slope portion of the lower horizontal portion. A cam for separating the press member of the article clamping means from the strip-shaped receiving plate to separate the printed article from the clamping means is provided at a portion close to, and the ascending slope portion and the upper horizontal portion are near both sides of the article. A fixed guide plate that supports the lower part of the Square in horizontal section in which is provided except for a printing unit a spring for pressing the lower vicinity of both sides of the article.

[Action]

Since this invention has the above-mentioned configuration, when one of the upper parts of the stacked articles is taken out by the article supply means and the front edge thereof advances to the upslope part of the conveying path, the strip-shaped receiving plate of the article sandwiching means becomes The pressing member sandwiches the front edge of the article.

In this way, the sandwiching means that sandwiches the front edge of the article passes through the upper part of the printing machine and prints on the upper surface while moving the upper horizontal part together with the transport body.

The article printed on the upper surface goes through the descending slope section together with the conveyor to the lower horizontal section so that the side on which the printing is performed becomes the lower side, and the unprinted section on the upper side is printed by the printing machine on the lower side. After that, the pressing member of the sandwiching means separates the printed article from the strip-shaped receiving plate by the action of the cam provided in the portion close to the upslope portion.

As described above, the sandwiching means that separates the printed article moves to the position of the first article supply means together with the endless carrier, and sandwiches the next article.

〔Example〕

In the embodiment shown in FIGS. 1 to 4, reference numeral 1 denotes a pair of left and right endless conveyors made of roller chains, which are arranged in parallel by a plurality of sprockets 2 and an upper horizontal portion a and a lower horizontal portion b are formed vertically. Each sprocket 2 as
Is arranged and one of the sprockets 2 is driven to drive the left and right carriers 1 in the same direction at the same speed as indicated by arrows.

Reference numeral 6 denotes an article holding means, which comprises a strip-shaped receiving plate 3 and a pressing member 5.

The strip-shaped receiving plate 3 connects the left and right carriers 1 at a constant interval, and both ends of the receiving plate 3 are fixed to the mounting plates 4 of the receiving plate mounting links arranged on the carrier 1 at regular intervals. .

The pressing member 5 is in the shape of a round bar, and both ends of this member 5 are fixed to the ends of the lever 7.

As shown in FIG. 3, a part of the lever 7 is rotatably attached to the attachment plate 4 by a shaft 8, and a spring 9 applies a rotational force in a direction for pressing the member 5 to the receiving plate 3. ing.

The outer end of the lever 7 is long, and a roller 11 is attached to the outer end of a shaft provided outward at the tip thereof as shown in FIG.

Reference numeral 13 denotes an open-top box in which articles 14 obtained by folding a large number of bags flat are stacked, and an article supply means 16 is provided on the box.

The supply means 16 includes an advancing / retreating member 17 that moves forward and backward along a guide 21, an elevating member 18 attached to the member 17, and a suction cup 19 attached to the lower end thereof.

The advancing / retreating member 17 and the elevating / lowering member 18 are driven by an air cylinder or the like (not shown), the suction cup 19 is made of rubber or the like, and is connected to the vacuum suction device via a solenoid valve by a hose (not shown).

A portion of the endless carrier 1 with respect to the supply means 16 is a rising slope portion c, and a fixed cam 24 is provided near the lower portion thereof. The cam 24 is fixed to a frame (not shown),
It acts on the roller 11, and by pressing the roller 11 near the upper part of the box 13, the pressing member 5 is separated from the receiving plate 3 and the article 14 supplied by the supply means 16
So that the tip of the can enter the lower part of the pressing member 5.

Further, a cam 25 is also provided below the cam 24 so that the roller 11 is pushed near the end of the lower horizontal portion b to separate the pressing member 5 from the receiving plate 3.

Reference numeral 28 in FIG. 1 denotes a printing machine in which two sets are arranged on each of the upper and lower horizontal portions.

These printing machines include a plate cylinder 31, an inking roller 32, an inking roller 33, a sink tank 34, and a receiving roller 35. Further, an axial groove into which the receiving plate 3 and the pressing member 5 are fitted is provided in a part of the outer periphery of the plate cylinder 31 so that the receiving plate 3 and the pressing member 5 can pass through the plate cylinder 31 without any trouble. is there.

Further, a strip-shaped fixed guide plate 30 is arranged along a required portion of the carrier 1.

Reference numeral 37 in FIG. 1 denotes a plurality of horizontal bars arranged at appropriate intervals on the outer side of the descending slope portion d and the lower horizontal portion b of the carrier 1, both ends of which are fixed to a frame (not shown).

A plurality of springs 38 for pressing the outer side of both ends of the article 14 are attached to each of the horizontal bars 37 in order to prevent the article 14 from hanging down. Further, a carry-out conveyor 40 is provided below a portion near the end of the lower horizontal portion b.

Next, the operation of the above embodiment will be described.

Now, with the elevating member 18 in the raised position and the advancing / retreating member 17 in the retracted position, the article 14 whose front end is sandwiched by the strip-shaped receiving plate 3 and the pressing member 5 in the previous stroke is shown in FIGS. As shown in the figure, it moves with the carrier 1 as indicated by the arrow.

In the first portion of the printing machine 28, the plate cylinder 31 is synchronously rotating at the same peripheral speed as the traveling speed of the carrier 1 as indicated by the arrow, and the ink in the ink tank 34 is transferred from the ink delivery roller 33 to the inking roller 32. Ink is applied to the printing surface of the plate cylinder 31 from the roller 32, and the first printing is performed on the article 14 that has entered the lower part of the plate cylinder 31.

In this way, when the article 14 that has been subjected to the first printing passes under the plate cylinder 31 of the second printing press 28, the second printing is performed.

In this example, two-color printing is performed by double-sided printing, but when one color is printed or when three or more colors are printed, a corresponding number of printing machines 28 may be arranged.

In this way, in the upper horizontal portion a, the article 14 printed on one side descends the downward slope portion d and is inverted, and while the article 14 is turned upside down to move the lower horizontal portion b, the upper surface is printed by the lower printer 28. Is printed on the other surface.

When the article 14 printed on both sides as described above comes onto the carry-out conveyor 40, the rollers 11 at the ends of the left and right levers 7 of the pressing member 5 holding the tip of the article 14 press the cam 25. As a result, the pressing member 5 is separated from the receiving plate 3 as shown in FIG. 2, and is rotated against the spring 9, and since there is no spring piece 38 in this portion, the printed article 14 is transferred to the conveyor 4
0 is dropped and discharged.

On the other hand, as described above, the suction cup 19 in the raised position is such that under the condition that the preceding article 14 is completely sent out and the next article supply signal is input, the elevating member 18 is lowered first and the suction cup 19 at the lower end thereof is vacuumed. Simultaneously with the suction state, the uppermost article 14 is attracted to the front ends of both side portions.

Then, when the elevating member 18 rises, the tip of the article 14 floats up, and when the advancing / retreating member 17 starts to move forward, the front edge of the article 14 goes upwardly on the upslope portion c of the carrier 1 and falls downward to this portion. The receiving plate 3 and the pressing member 5 of the sandwiching means 6 that have passed the cam 25 and separated the printed article 14 rise, but as described above, the pressing member raised immediately before the article 14 is supplied. The roller 11 at the end of the lever 7 attached to the roller 5 is pressed by the cam 24 to open the gap between the receiving plate 3 and the pressing member 5. Therefore, the tip of the article 14 supplied by the supply means 16 as described above is inserted between the open receiving plate 3 and the pressing member 5.

Further, when the carrier 1 is moved and the roller 11 is disengaged from the cam 24, the pressing member 5 presses the tip of the article 14 onto the receiving plate 3 by the action of the spring 9 and ascends together with the carrier 1, and the same as the previous time. Both sides are printed in this order and dropped on the conveyor 40.

〔effect〕

As described above, the present invention provides a pair of left and right endless conveyors that are driven to circulate between the printers arranged above and below, and the tip ends are sandwiched by the sandwiching means provided on both the endless conveyors. Since the printed article is printed while moving the upper horizontal portion and the lower horizontal portion together with the carrier, the article itself is reversed and printing is performed on both sides thereof.

Therefore, the printing efficiency is improved, and since the printing presses may be arranged vertically, the installation area can be reduced in spite of using a plurality of printing presses. Further, while the article clamping means that clamps the front edge of the article supplied by the article supply means moves up the ascending slope portion, the article moves upward while maintaining the correct posture by the fixed guide plate. By the fixed guide plate provided on the above, printing is performed at the correct position in combination with the guide action.

Further, in the lower horizontal portion, since the vicinity of both side portions of the article is pressed by the spring, there is an effect that printing is performed in the correct position also in the lower horizontal portion.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view of the device of the present invention, FIG. 2 is an enlarged vertical side view of a part of the same as the above, FIG. 3 is an enlarged vertical side view of the clamping means, and FIG. It is a figure. 1 ... Endless carrier, 3 ... Strip receiving plate, 5 ... Pressing member,
6 ... Clamping means, 7 ... Lever, 9 ... Spring, 11 ...
Roller, 14 ... Goods, 16 ... Goods supply means, 17 ...
… Advancing / retracting member, 18 …… Elevating member, 19 …… Sucker, 24,
25 ... cam, 28 ... printing machine, 40 ... transport conveyor.

Claims (1)

[Scope of utility model registration request] 1. A pair of left and right endless conveyors arranged in parallel on the left and right constitute a conveying path composed of an upper horizontal portion, a lower horizontal portion, an ascending slope portion and a descending slope portion, and upward from the ascending slope portion of the conveying path. Driving means for driving the left and right endless conveyors is provided so as to go from the downward slope portion to the downward horizontal portion via the horizontal portion, and the stacked articles are taken out one by one from the upper part in front of the lower part of the ascending slope part. The article supply means for advancing the leading edge of the lever to the above-mentioned upslope portion is provided,
Between the left and right endless conveyors, a strip-shaped receiving plate for receiving the leading edge of the article supplied from the article supply means, and an article by pressing the front edge of the article on the receiving plate onto the strip-shaped receiving plate. A plurality of article sandwiching means consisting of pressing members for sandwiching the article are provided at regular intervals, and the upper horizontal portion and the lower horizontal portion are provided with a printing machine for printing on the upper surface of the article passing through these horizontal portions. A cam is provided at a portion of each of the lower horizontal portions near the rising slope portion to separate the pressing member of the article holding means from the strip-shaped receiving plate to separate the printed article from the holding means. The upper and lower horizontal parts are provided with fixed guide plates that support the lower part near both sides of the article except for the printing section, and the lower horizontal section is also provided with springs that press the lower side near both sides of the article except for the printing section. Printer.