JP2578195Y2 - Powder scattering equipment for sheet-fed printing presses - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a sheet-fed printing press which transports undried printing ink between papers stacked on a paper stack of a paper discharging device by a paper discharging chain so as not to set off. The present invention relates to a dusting device for spraying a spray powder on a printing surface of a paper sheet.

[0002]

2. Description of the Related Art A sheet-fed printing press includes a sheet feeding device for sucking paper loaded on a paper stack one by one from an upper layer and supplying the sucked paper to a difference plate, and a printing cylinder using a swing device from the difference plate. A printing unit that prints on the paper supplied to the printer, and a paper discharge device that holds the printed paper with the nails of a paper discharge chain to convey and discharge the paper onto the paper stacking board.

In such a sheet-fed printing press, the paper conveyed by the pawls of the paper discharging device may fall and be loaded on a paper stacking board until the printing surface is not sufficiently dried, and the amount of paper loaded If the weight increases and the weight increases, the undried ink on the printing surface may be set off to the upper paper and cause paper loss. A dusting device is installed, and spray powder (hereinafter simply referred to as powder) is applied to the printing surface of the paper conveyed by the paper ejection chain after printing.
Spraying to dry the printing surface to prevent set-off.

[0004]

However, in the dusting by such a conventional dusting device, if the powder is to be sprayed on the entire printing surface, the powder is scattered around the conveyance paper.
This powder not only adheres to peripheral machine parts and impairs its function, drops on the floor etc. and deteriorates the working environment, but also causes workers to inhale floating powder. Harmful to health.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a dusting apparatus for a sheet-fed printing press which is capable of shielding the scattering of spray powder with a simple configuration.

[0006]

In order to achieve this object, according to the present invention, a vehicle is driven between a printing unit and a discharge paper stack.
A pawl for conveying the paper and a pawl provided above the traveling path of the pawl.
Dust spray and the travel diameter of the nail with this dust spray in between
Provided upstream and downstream of the road to prevent spray powder from scattering
A shielding member for shielding, and a sliding member provided on the shielding member;
And a brush in contact therewith.

[0007]

[Action] is blown spray powder from the spray to the paper to be conveyed by the pawls, the spray powder shielding portion
It is shielded by the material and the brush to prevent scattering.

[0008]

1 to 4 show an embodiment of a dusting device of a sheet-fed printing press according to the present invention, and FIG. 1 shows a side view of a sheet discharging device of a sheet-fed printing machine implementing the dusting device of the present invention. FIG. 2, FIG. 2 is a front view taken along the line II in FIG. 1, FIG.
FIG. 4 is a sectional view taken along line IV-IV of FIG. 1.

In FIG. 1, a sheet discharging device 1 includes a pair of left and right frames 4 formed in a substantially inverted L shape and connected by stays 2, 3, etc. A sprocket 5 is rotatably pivoted at the distal ends of the left and right horizontal members 4a.

On the other hand, sprockets 6 are mounted on both end shafts of a paper discharge cylinder which is in contact with the final printing cylinder of a printing unit (not shown). A prime mover is provided between each sprocket 6 and each sprocket 5. The paper discharge chains 7 traveling in the direction indicated by the arrow A in the figure by the rotation of the sprocket 6 driven from the side are respectively stretched. Paper output chain 7
Is guided by an endless chain guide 8 and an endless chain guide 9 having a substantially U-shaped cross section as shown in FIGS.

A plurality of claw rods 10 each having a claw axis and a claw base axis are supported at regular intervals between the left and right paper discharge chains 7, and each claw rod 10 has a claw and a claw base. A plurality of sets of gripping claw devices 11 (hereinafter referred to as claws 11) are arranged in the axial direction, and the leading ends are gripped from the claws provided on the final cylinder of the printing unit to the claws 11 of the paper discharge chain 7. The replaced paper 12 is configured to be conveyed by the travel of the claws 11.

Below the paper 12 conveyance path, rectangular plate-shaped paper guides 13, 14, 14 divided in the conveyance direction of the paper 12 are provided.
15 is supported along the conveyance path, and is configured to support and guide the paper 12 to be conveyed.

A spray pipe 16 connected to an air source (not shown) is supported between the left and right frames 4 above the conveying path of the paper 12 at a rising portion of the paper discharging chain 7 which rises obliquely upward from the start end. In this spray tube 16,
A plurality of spray nozzles 17 are arranged side by side, and are configured to spray spray powder (hereinafter simply referred to as powder) on the paper 12 being conveyed. Reference numeral 18 denotes a dust collector provided near the spray nozzle 17 to collect dust and powder around the spray nozzle 17.

A stay 19 is provided in the vicinity of the spray nozzle 17 near the paper discharge start end so as to connect the left and right frames 4 to each other.
A shield plate 20 slightly shorter than 9 is fixed. further,
A brush 21 is fixed to the upper and lower edges of the shielding plate 20 by flocking the bristle with the traveling claw 11. The spray nozzle 17 is formed by the shielding plate 20 and the brush 21.
Is configured to shield one side in the vicinity.

A stay 22 is provided near the end of the paper discharge near the spray nozzle 17 to connect the left and right frames 4, and this stay 22 is slightly shorter than the stay 22. The brush 23 is fixed by bringing the flocking into sliding contact with the traveling claw 11.
Thereby, one side around the spray nozzle 17 is shielded. Further, the paper guides 13, 14, 15
The gap formed between the frame and the left and right frames 4 is
4 shielded.

Below the rising portion of the paper discharge chain 7 provided with the spray nozzle 17, a receiving tray 26 with a handle 25 for receiving spray powder, dust and the like falling from above is moved forward and backward on a rail 26a close to the floor surface. It is formed so as to be movable in the direction, and is configured so that the inside can be cleaned by grasping the handle 25 and pulling it out from the position shown in the figure.

Above both front and rear ends of the tray 26 at the storage position shown in the drawing, there are provided shielding plates 27 for shielding the spray powder from scattering on the floor surface, and above the rear half of the tray 26. A drop guide plate 28 for spray powder whose upper end faces directly below the spray nozzle 17 is provided close to the tray 25 receiving the lower end opening.

Below the end of the paper transport of the paper discharge chain 7,
A paper stacking device 30 schematically shown in FIG. 1 is provided,
The stacking device 30 includes a horizontal member 4a of the discharge frame 4.
And a stacking board suspended from the lifting chain from above, and a stacking board mounted on the stacking platform. The transported paper 12 is released from the grip of the claws 11 at the transport end portion, and is configured to drop on the paper stacking board and be loaded.

The operation of the dusting apparatus configured as described above will be described. The paper 12 after printing is replaced by the pawls provided on the final cylinder of the printing unit to the pawls 11 of the paper discharge chain 7 and the paper guides 13 and 1 are driven by the paper discharge chain 7 traveling.
The paper is conveyed with the printing surface facing upward while being slid and guided by the rollers 4 and 15, released from the grip of the claw 11 at the conveyance end, and dropped and loaded on the paper stacking plate of the paper stacking device 30.

The transport paper 12 in such a paper discharging operation
Is printed immediately after printing, but the printing surface is not dried. However, the powder ejected from the spray nozzle 17 at the rising portion of the paper discharge chain 7 is blown onto the printing surface of the transport paper 12, so that the paper No set-off occurs between the papers 12 stacked on the paper stacking plate of the stacking device 30.

When the powder is sprayed from the spray nozzle 17, excess powder that does not adhere to the printing surface of the paper 12 scatters around, is collected by the dust collector 18, and is discharged outside the machine.
The powder that is not collected by the dust collector 18 and scatters around the spray nozzle 17 is shielded by the long shield plate 20 provided before and after the spray nozzle 17 and the brushes 21 and 23. It does not scatter before and after the plate 20 and the brushes 21 and 23. In this case, since the claws 11 run while sliding on the brushes 21 and 23, the shielding function is good and the claws are not damaged. Further, since the periphery of the dust collector 18 is shielded, the dust collecting effect of the dust collector is improved.

Further, since the gap between both ends of the paper guides 13, 14, 15 is shielded by the shielding plate 24, the paper guides 13
The powder and the like on the paper guides 15 to 15 are discharged from the lower end opening through the drop guide plate 28 into the receiving tray 26 without scattering from the left and right end portions of the paper guides 13 to 15 and do not scatter on the floor or the like. When the inside of the tray 26 is contaminated with powder or the like, the inside of the tray 26 can be easily cleaned by grasping the handle 25 and pulling out the tray 26.

[0023]

As is clear from the above description, according to the present invention, in the dispersing device of the sheet-fed printing press, the printing unit is used.
Claw that transports the paper by traveling between the
A dusting spray provided above the claw travel path and this dusting
Install the spray on the upstream and downstream sides of the claw traveling path
A shielding member for shielding the spray powder
By having a brush provided on the covering member and slidably contacting the nail, even if spray powder is sprayed on the entire printing surface,
This spray powder is shielded by the shielding member and the brush and does not scatter to the peripheral part and does not adhere to the peripheral mechanical parts, so that the function of the mechanical parts is not hindered and the durability of the mechanical parts is maintained. Is improved. In addition, the working environment is improved because the spray powder does not scatter on the floor, and the worker does not inhale the spray powder, which is sanitary.

[Brief description of the drawings]

FIG. 1 is a side view of a sheet discharging device of a sheet-fed printing machine in which a dusting device according to the present invention is implemented.

FIG. 2 is a front view taken along the line II in FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 1;

[Explanation of symbols]

 7 paper discharge chain 11 claw 12 paper 17 spray nozzle 19 shielding plate 20 brush 22 brush

Claims (1)

(57) [Scope of request for utility model registration] 1. Travel between a printing unit and a discharge paper stack
A pawl for conveying the paper and a pawl provided above the traveling path of the pawl.
Dust spray and the travel diameter of the nail with this dust spray in between
Provided upstream and downstream of the road to prevent spray powder from scattering
A shielding member for shielding, and a sliding member provided on the shielding member;
A dispersing device for a sheet-fed printing press, comprising a brush provided .