JPH082641B2 - Printing machine powder-spraying device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder spraying device for a printing press.

[0002]

As a conventional, powder spraying apparatus for a printing press, sent to the storage chamber from the supply chamber the powder allowed to rise up the receiving chamber of the powder by ejecting air into the powder storage room, injection of the powder Isola It is known to suck up with air, mix with a mixer and send to a spraying position.

[0003]

The object of the invention is to be Solved by the conventional powder
The sprinkler does not feed the powder from the supply chamber to the storage chamber.
Since it is quickly made into a large amount in a lump,
A large amount of scatter remains on the printing paper, resulting in poor print quality.
Below, printing failure when printing again, deterioration of work environment, machine
Occurrence of failure etc. occurs. In addition, the above conventional spraying device,
Fine adjustment of the amount of air blown out by the adjusting means for powder flying
Difficult to operate the adjustment and, as a result, dusting of the powder
Fine adjustment of the amount is also difficult. Furthermore , air and powder are not uniformly mixed in the mixer of the conventional spraying device.

The present invention relates to a powder supply chamber to a storage chamber.
The powder is sprayed in small amounts, and the powder is sprayed.
The minimum amount required, which results in better print quality
Retention, smooth reprinting, and improved work environment
To provide a powder sprinkler that protects the machine well
Is what you are trying to do. In addition, the present invention is a powder dance
Easy operation for fine adjustment of the ejection amount of lifting air,
As a result, it is easy to fine-tune the amount of powder sprayed.
It is intended to provide a Uder spraying device. further
Further, the present invention is intended to provide a powder spraying device in which air and powder are uniformly mixed.

[0005]

Means for Solving the Problems In order to achieve the above object, the present invention provides a powder for connecting a powder supply chamber and a storage chamber.
Incorporate a powder drop adjusting rod into the drop pipe, and
With a guide hole on the vertical axis that optimally limits the drop amount of the dar
A lateral discharge hole communicating with this guide hole is formed.
A window that communicates with the horizontal discharge hole and the storage chamber is formed into a powder drop pipe.
Is made. Also, the present invention is for powder soaking
As a means for adjusting the air ejection amount, a rotatable adjustment shaft is
The space where air is sent and the air that communicates with the space
There is an adjustment groove in the sending direction, and this adjustment groove faces the ventilation hole.
And rotate in a partially communicating relationship, and follow that rotation.
The width of the adjustment groove is shaped so that the communication area expands or contracts.
Is made. Furthermore, the present invention comprises a tubular guide wall for guiding the mixer from the inlet to the outlet, and a flange formed on the guide wall.

[0006]

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 shows a paper discharge section of a printing machine, in which a printed paper (1) is sent to a chain gear (3) by a chain (2),
Stacked on a support (4) below the chain wheel.

Dispersing nozzles (5) for powder are arranged at the obliquely rising portions of the chain (2). When the printing paper (1) passes through the nozzle (5), a powder (6) for set-off prevention is sprayed by the nozzle (5). An air outlet (7) is provided above the nozzle (5), and an air cart (8) is formed at this outlet to prevent the powder from scattering.

As a means for synchronizing the spraying operation of the powder with the passage of the printing paper (1) through the nozzle (5), the cam (9) is common to the chain gear so that it rotates integrally with the chain gear (3). Of the swinging arm fixed to the shaft (10) of the
A diaphragm (11) is connected to the valve (12). When the arc portion (13) of the cam (9) is in contact with the arm (11), the valve is opened and the powder is sprayed, and the recessed portion (14) of the cam is opened.
When it is in contact with (11), the valve is closed and the spraying of powder is stopped.

FIG. 2 schematically shows a powder spraying device.
When the blower (15) blows air into the main body (17) through the pipe (16), the powder supplied from the powder supply container (18) is passed through the pipes (19) to the respective powders. -Carry it to the spray nozzle (5) and spray. The valve (12) is provided in the middle of the pipe (16), and the opening and closing of the valve is controlled by the cam (9). The air sent from the blower (15) is intermittently sent to the main body (17) according to the opening and closing of the valve (12), and the powder is sprayed intermittently. The pipe (20) sends air from the blower (15) to the air outlet (7) and is used to form an air-curtain (8). The adjusting knob (21) is used to increase or decrease the flow rate of a part of the air passing through the main body (17) to adjust the spraying amount of the powder. The other adjusting knob (22) is used for adjusting the flow rate of the mixed fluid of air and powder sent to the nozzle (5) through each pipe (19), and by rotating this knob. , Powder
It is possible to adjust the spraying amount of each nozzle, or evenly adjust the spraying amount of each nozzle.

3 and 4 more specifically show the powder spraying device, in which the powder supply container (18) is a valve box (23).
The valve box is connected to the main body (24), and the main body is connected to the powder container (25). The body (24) is a rectangular parallelepiped that is almost square when viewed from above, and has a fitting for air feeding on its right side.
(26) is connected, and a cylindrical mixer (28) is connected to the left side through joints (27), (62) for sending out a mixed fluid of air and powder, and a cylindrical distributor is connected to the mixer. Vessel (29) is connected. The knob (22) for adjusting the flow rate of the mixed fluid to be distributed is provided on the front surface of the distributor (29), and the joint (30) for guiding the mixed fluid to be distributed to the pipe (19) is provided on the rear surface. Has been. On the front surface of the main body (24), the knob (21) for adjusting the amount of air that blows up the powder flowing into the powder container (25) is attached.

The powder is filled in the supply chamber of the supply container (18) from its upper end opening surface, and the opening surface is closed by the lid (31).

The powder in the supply container (18) is intermittently replenished in the accommodating chamber of the powder container (25) according to the opening and closing of a valve element (described later) in the valve box (23).

The opening and closing of the valve is driven by a solenoid (34) and a tension coil spring (35) via an arm (32) and a lever (33), and the drive command to the solenoid is the powder container (25). The light sensors of the light emitter (36) and the light receiver (37) provided on both sides of ().

The air sent from the joint (26) into the main body (24) sucks the powder in the powder container (25) and mixes it.
Send to (28). The powder is uniformly mixed with air in the mixer (28) and sent to the distributor (29). Powder
The mixed fluid of air and air is sent from the distributor (29) to the pipe (19) at the joint (30). Powder sent from the main body (24)
The total amount of powder is adjusted by the knob (21) and distributed.
The amount of is adjusted with knob (22).

The supply container (18) is a transparent cylindrical main body (38).
And a funnel-shaped bottom (39) fixed to the lower end of the valve, the cylindrical neck (40) at the lower end of the bottom is fitted into the small-diameter cylindrical part (41) of the valve box (23) and screwed. It is fixed at (42) (Fig. 5). The filling amount of the powder in the supply container (18) can be visually checked from outside the main body (38).

The valve box (23) is composed of the small-diameter cylindrical portion (41) and a large-diameter cylindrical portion (43) integrally connected to the cylindrical portion (41).
A vertical hole (44) for powder feeding is formed in (41) and (43), and a horizontal hole (45) communicating with this hole (44) is formed in the cylindrical portion (43). .

A valve element (46) is provided at the upper end of the tubular portion (41), and a rubber valve seat (47) which comes into contact with the valve element is installed in an annular groove at the upper end of the tubular portion (41). ing.

The valve body (46) is the valve rod (48) in the hole (44) of the valve box (23).
The neck portion (49) of the valve rod (48) is engaged with the fork portion (50) of the lever (33) in the lateral hole (45). The lever (33) is supported by the fulcrum (52) of the lever receiver (51) and swings around the fulcrum to move the valve body (46) up and down to move the valve body (46).
The flow path between (46) and the valve seat (47) is opened and closed. Leverage (5
1) has a flange (53), and this flange (53) is
It is fixed to 3) and the opening surface of the lateral hole (45) is closed. The lever (33) is further fixed to the arm (32).
(32) is connected to the operating rod (54) of the solenoid (34) by a pin (55), and the operating rod (54) is constantly subjected to upward pulling force by a tension coil spring (35). When the operating rod (54) is lowered by the magnetic force, the valve body (46) separates from the valve seat (47), and when the magnetic force disappears and is raised by the spring force, the valve body (46) moves the valve seat (47). ).

The main body (24) is formed in the shape of a substantially rectangular parallelepiped having side surfaces parallel to each other, and has a cylindrical channel space (56) at its center and a central hole concentric with the space and continuous with the space.
(57) is formed, and the holes (58), (5) of the flow path having a circular cross section and communicating with the space (56) in the lateral direction orthogonal to the center of the space (56)
9) has been formed. In addition, the hole (6
0) is formed so as to penetrate the hole (58) at a right angle.

A fitting (26) for the pipe (16) is fixed to the hole (58) with a screw (61), and a fitting (62) for the mixer (28) is fitted with a screw (63) in the hole (59). The nozzle (64) for injection is fixed by screws (65) over the hole (59) and the hole of the joint (62). The outer circumference of the nozzle (64) and the hole (59) in the body and the hole (6
An annular space (67) is formed between 6). Air fittings
When fed into the (26), air is accelerated from the flow path of the hole (58) through the flow path of the central space (56) in the flow path of the nozzle (64) to the hole (66) of the joint (62). The air in the annular space (67) is injected into the flow path and is sucked into the hole (66) of the joint (62). This suction force sucks the powder as described later and sends it to the next mixer (28). The joint (62) is connected to the joint (27) with a screw (68).

The powder container (25) has a transparent cylindrical shape and is provided on the lower surface of the main body (24), and the opening surface at the lower end of the container (25) is closed by a lid (69). This powder container (25)
The powder accommodating chamber of the main body (24) has a vent hole (70) to form an annular space.
It communicates with (67) and sucks out the powder in the container (25) into this annular space.

The cylindrical powder drop pipe (71) for guiding the powder from the valve box (23) into the container (25) has a hole (57) at the center of the main body (24).
It penetrates through the central space (56) and the space of the container (25) and the central hole (72) of the bottom lid (69). The powder dropping pipe (71) has its upper end fixed to the hole (44) of the valve box (23) with a screw (73), and the tightening nut (74) attached to the outer periphery of the lower end with a screw (75). The nut secures the bottom lid (69) to the container (25). Powder Drop Tube (71)
Further has a pair of rectangular windows (78) arranged in the peripheral wall near the lower end between both ends in a diametrically opposed relationship. This window (78) is a powder container inside the powder drop pipe (71).
Connect the powder in the powder drop pipe (71) to the container (2
5) Send it out.

A powder drop adjusting rod is provided on the inner circumference of the powder drop tube (71).
(110) is fixed with screws (111). This adjusting rod (11
(0) is also cylindrical and is formed to have a size in close contact with the inner peripheral surface of the powder drop pipe (71), and has a small-diameter powder guide hole (112) bored in the longitudinal direction at the center thereof and the guide hole (112 ) Has a large diameter powder discharge hole (113) which communicates with the lower end of the adjustment rod (110) in the lateral direction of the diameter of the adjustment rod (110), and the opening surface of this discharge hole is the adjustment rod (110).
Are opened in the plane portions (114) cut in parallel with each other and face the window (78) of the powder drop pipe (71).

From the upper opening surface of the powder drop pipe (71), the adjusting rod (11
The space (115) of the large-diameter hole portion up to the upper end surface of 0) is used for temporarily storing the powder sent from the supply container (18). The powder is supplied to the space (115) intermittently by opening and closing the valve body (46) and the valve seat (47). The powder in the space (115) is guided by the guide hole (112) to the discharge hole (113) so that the amount of fall is limited, and the powder (P) of the powder drop pipe (71) is opened through the window (78). Via container (2
Sent to 5).

A vertical small-diameter hole (1
12) is used as a space for temporarily storing powder with the space (115) of the powder drop pipe (71) by forming a part of the upper part thereof into a large diameter hole (116) (Fig. 10). Well, that hole
The entire space for storage is expanded only by the space of (116).

The powder is supplied from the container (18) to the container (25) by opening the valve body (46) in the space from the valve box (23) to the pipe (71) as described above. Once stored in the container (1
With the supply from 8) blocked by closing the valve (46),
The powder is sent out through the window (78) in small quantities. Valve box (23) and pipe
When the powder in the space within (71) approaches the sky, the valve body (46) automatically opens and is supplied again into the space. The command to open the valve is to send the light from the projector (36) and the light receiver (37) on both sides of the container (25).
The optical sensor (1) detects the level (79) of the powder, and when it falls below that level, it is electrically transmitted to the solenoid (34).
When the powder reaches the level (82) of the optical sensors of the light projector (80) and the light receiver (81), it indicates that the powder in the container (18) is empty and warns.

Air is blown into the container (25) and the powder is discharged.
Soaring the powder will make the powder suction even smoother. Further, when the amount of air supplied is adjusted, the amount of powder sucked in is adjusted. The configuration will be described below.

The fixed shaft (83) and the rotatable air flow adjusting shaft (8
4) are fitted at their abutting portions so that they are aligned on the same axis (FIGS. 6 and 8). These shafts (83) and (84) are formed with cylindrical holes (87) and (88) in the axial direction for ventilation for a predetermined length from the abutting ends. The fixed shaft (83) has a circular hole (89) communicating with the hole (87) formed in the peripheral wall (FIG. 6), and the adjustment shaft (84) also adjusts the circumferential direction so as to communicate with the hole (88). Grooves (90) are formed (Fig. 8). Air is sent from the hole (89) of the fixed shaft (83) into the hole (87), and this hole (8
It is sent from 7) to the hole (88) of the adjacent adjusting shaft (84) and sent out from the groove (90). The adjustment groove 90 is formed such that its width gradually expands or continuously expands in the circumferential direction of the adjustment shaft 84.

The fixed shaft (83) is inserted into the latter half of the common bearing hole (66) of the main body (24) and fixed with the screw (91), and the adjusting shaft (84) is rotatably inserted into the first half. (Figs. 6 and 8). The tip end surface of the adjusting shaft (84) is further pressed by the mounting seat (93) of the scale plate (92) and is held in the bearing hole (66) (FIG. 6).

The adjusting knob (21) is fixed to the thin shaft portion (94) of the adjusting shaft (84), and the adjusting shaft is adjusted in the range from 0 scale to 10 scale of the scale plate (92). It can be rotated.
The scale plate (92) is fixed to the mounting seat (93), and a finger line (95) for adjusting the scale of the scale plate is attached to the adjusting knob (21).

The air intake hole (89) of the fixed shaft (83) is provided in the main body.
Looking into the channel (58) of (24), it faces the joint (26) so as to face the flow of air (FIGS. 5 and 6).

The adjusting groove (90) for air discharge of the adjusting shaft (84) is formed on the inner peripheral surface of the bearing hole (66) of the main body (24) so as not to directly communicate with the flow path (58) of the main body (24). The position surrounded by the contact state is taken (Fig. 6). Circular vent (9) communicating with this adjustment groove (90)
6) extends vertically downward from the bottom of the inner peripheral surface of the bearing hole (66) of the main body (24) and opens at the bottom surface of the main body (24) (FIG. 7).

When the adjusting shaft (84) is rotated by the knob (21),
The vent hole (96) can move relative to the adjustment groove (90) between a position where the scale 0 does not communicate at all and a position where the scale 10 communicates with the maximum area. According to the movement, the communication area is increased or decreased, and the amount of air discharged from the ventilation hole (96) is increased or decreased.

The disc-shaped dish (98) has its center hole (99) shattered and fitted into the pipe (71), and the nut screw-fitted into this pipe.
It is fixed to the bottom of the body (24) with (100). This dish (98)
The central part closes the opening surface of the space (56) in the center of the main body (24) and prevents air from flowing into the container (25) through the opening surface. Further, the dish (98) has an annular groove (101) concentric with the disc formed on the upper surface thereof, and the opening surface of the groove (101) is in close contact with the bottom surface of the main body (24) to form an annular space having a tunnel cross section. To form. The annular groove (101) is arranged at a position communicating with the ventilation hole (96), and four ventilation holes (102) communicating from the annular groove (101) into the container (25) are provided at the bottom of the groove (101). It is provided at intervals. The air sent from the ventilation hole (96) into the annular groove (101) is ejected from the ventilation hole (102) into the container (25) and soars the powder in the container. The powder soared from the circular gap (103) between the outer periphery of the dish (98) and the inner peripheral surface of the container to the ventilation hole (7
0), is sucked by the jet flow of the nozzle (64), and is sent out from the joint (62). The ventilation hole (102) is an annular groove (10
If it is formed in the oblique hole facing 1) in the circumferential direction, a whirlpool air flow will be generated and the powder will be raised more smoothly.

The mixer (28) includes a cylindrical guide wall (1) for the mixed fluid in the direction from the inlet to the outlet inside the cylindrical main body (120).
21) is formed, and the guide wall is provided with four rows of annular inner flanges (122) for disturbing the mixed fluid. This mixer (2
The joint (27) is connected at right angles to the outer periphery of the body (120) near one end of the body (120) with a screw (123). When the mixed fluid of air and powder is sent from the joint (27) into the body (120), the mixed fluid changes its flow direction at a right angle and is disturbed by the flange (122) to uniformly mix the air and powder. , The next distributor
It is sent to (29).

The distributor (29) is a shallow cylindrical body (1
24) and a circular lid (125) that closes the opening surface of the main body. The center hole (126) of the main body (124) is fitted to the outer periphery of the mixer (28) on the outlet side, and is joined by the retaining ring (127). Body (124)
Six joints (30) are concentrically attached to the bottom (128) of the center with screws (129) at equal intervals, and the mixed fluid is sent out to each nozzle (5) from this joint. The lid (125) is fixed to the main body (124) with screws (not shown), and six screw holes (130) are formed on a concentric circle in the center thereof so as to correspond to the joint (30). The adjusting screw (22) is screwed into each screw hole (130), and the tip surface (131) of the adjusting screw (22) is in the through hole (132) of the joint (30).
Looking into the entrance of. When the screw (22) is turned to the left or right, the gap between the tip surface (131) and the inlet surface of the through hole (132) of the joint (30) becomes wider or narrower. As a result, the flow rate of the mixed fluid delivered from the joint (30) is adjusted. Therefore, the outflow amount from each joint (30) can be made uniform. The lid (125) further has a central conical surface (133) and an annular space (134) around the conical surface on the side facing the guide wall (121) of the mixer (28), and the guide wall (121). The fluid delivered from the is radially distributed on the conical surface (133) and reaches each joint (30) via the annular space (134).
The compression coil spring (135) is wound around the adjusting screw (22) and interposed between the head of the screw (22) and the lid (125) to prevent the screw (22) from loosening.

[0038]

The present invention has a powder supply chamber and a storage chamber.
The powder drop adjusting rod (11
0) is incorporated, and the amount of powder falling is optimal for this adjusting rod.
The guide hole (112) and this guide on the vertical axis that limits to
A lateral discharge hole (113) communicating with the hole is formed and
A window communicating with the lateral discharge hole (113) and the storage chamber
Since (78) is formed on the powder drop pipe (71),
A small amount of Uder feeding from the supply room to the storage room
Is done to keep the powder application to a minimum
This keeps the print quality good and smoothes the overprinting.
In addition, the working environment is improved and the machine is well protected.
It Further, the present invention is a powder that is blown up by jet air.
The spraying device that sucks in the spray air and sends it in the direction and direction.
The amount of air blown up can be adjusted so that it can be rotated.
The circumferential adjustment groove formed on the shaft and the adjustment groove partially
Increase or decrease the communication area by relative rotation with the communicating vents
Adjust the amount of powder by adjusting the adjusting means.
Since it is composed of
Is easy to operate. Furthermore, the present invention provides a mixer (2
8) is composed of a cylindrical guide wall (121) for guiding the mixed fluid in the direction from the inlet to the outlet and an inner flange (122) protruding from this guide wall, so that powder and air are evenly distributed. The mixture, and thus the powder, is evenly distributed on the printing paper.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a paper discharge unit of a printing machine.

FIG. 2 is a schematic front view of the powder-spraying device of the present invention.

FIG. 3 is a front view of the powder-spraying device of the present invention.

FIG. 4 is a plan view of the powder-spraying device of the present invention.

5 is a sectional view taken along line VV of FIG.

6 is a sectional view taken along line VI-VI of FIG.

7 is a sectional view taken along line VII-VII in FIG.

8 is a sectional view taken along the line VIII-VIII in FIG.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a partial cross-sectional view of a modified example of the powder drop adjusting rod of the present invention.

[Explanation of symbols]

1 Printing Paper 2 Chain 3 Chain Gear 5 Powder Spraying Nozzle 6 Powder 7 Air Outlet 8 Air Carten 9 Cam 12 Valve 15 Blower 16 Air Supply Pipe 17 Main Body 18 Powder Supply Container 19 Powder and Pipes for feeding mixed fluids of air 20
Air supply pipe 21 Adjusting knob 22 Adjusting knob
23 Valve box 24 Main body 25 Powder container 28 Mixer 29 Distributor 34 Solenoid 35
Tension coil spring 46 Valve body 47 Valve seat 48 Valve rod 56 Flow path space
58 Channel hole 59 Channel hole 60 hole 64 Nozzle 70 Vent hole
71 Powder drop pipe 78 Window 83 Fixed shaft 84 Adjustment shaft 87 Hole 88 hole 89 Hole 90 Adjustment groove 92
Scale plate 98 Plate 101 Annular groove 102 Vent hole 110 Powder drop adjusting rod 112 Guide hole 113 Discharge hole 12
1 Guide wall 122 Flange 124 Main body 125 Lid
135 compression coil spring

Claims (2)

[Claims] 1. A and powder supply chamber, a powder storage chamber to store the powder to be said feed chamber or al subjected supply, the supply chamber
Powder drop pipe that guides powder from the storage chamber to the storage chamber
When a flow path rise up the powder by feeding air into the accommodation chamber, a flow path suck on wishes powder dance of the accommodation chamber in the injection stream, spraying means the wicking was powder mixed with air Equipped with a mixer for feeding in the direction, and a valve means is provided between the powder supply chamber and the powder drop pipe.
A powder drop pipe is provided to intermittently supply powder
A powder drop adjusting rod is installed in the powder drop tube,
A fine guide hole in the vertical direction provided on the leveling bar allows powder to fall.
Displacement in the lateral direction communicating with the guide hole by optimally limiting the downward amount
Powder is sent from the hole to the storage chamber through the window of the powder drop pipe.
And pass it through the flow path for powder
Means for adjusting the flow rate of the excess air is provided.
The stage is connected to the internal space into which air is sent and the internal space.
There is an adjustment groove in the circumferential direction of the peripheral wall that sends out that air through
Partial communication with the rotatable adjustment shaft and the adjustment groove
It has a ventilation hole, and the width of the adjustment groove is vented according to its rotation.
Formed so that the area communicating with the hole expands or contracts.
Is, the mixers powder spraying apparatus for a printing press having a flange for disrupting a fluid mixture is formed into a cylindrical guide wall and the guide wall to guide the direction of the outlet of the mixed fluid from the inlet. 2. The mixer is coupled to a distributor.
The powder-spreading device of the described printing machine.