JPH0764049B2 - 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]

2. Description of the Related Art Conventionally, as a powder spraying device of a printing machine, air is jetted into a powder storage chamber to cause the powder in the storage chamber to fly up, and the powder air is sucked up and sent to a spraying position. Things are known. In this apparatus, the amount of air blown up for powder is adjusted by the adjusting means to adjust the amount of powder sprayed.

[0003]

In the above-mentioned conventional spraying device, it is difficult to finely adjust the air ejection amount by the powder soaring adjusting means, and as a result, the powder spraying amount is finely adjusted. Adjustment is also difficult.

An object of the present invention is to provide a powder spraying device in which the operation of finely adjusting the amount of air blown up for the powder can be easily performed, and by which fine adjustment of the spraying amount of the powder is facilitated. It is a thing.

[0005]

In order to achieve the above object, the present invention provides a space into which a rotatable adjusting shaft is fed as a means for adjusting the amount of air blown up for powder flying, and the space. It has an adjusting groove in the direction of sending the air in communication with the adjusting groove, and the adjusting groove rotates in a relationship of partially communicating with the ventilation hole, and the adjusting area is expanded or contracted according to the rotation. Is formed.

[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 to adjust the flow rate of the mixed fluid of air and powder sent to the nozzle (5) through each pipe (19), and the rotation of 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, a cylindrical mixer (28) is connected to the left side through a joint (27) that sends out a mixed fluid of air and powder, and a cylindrical distributor (29) is connected to the mixer. Are combined.
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 container (18) from the opening surface at the upper end thereof, and the opening surface is closed by the lid (31).

The powder in the supply container (18) is intermittently replenished in 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). ) Is provided by the sensors of the light emitter (36) and the light receiver (37) provided on both sides.

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). 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 (49) of the valve rod (48) is engaged with the fork (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) are formed.
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).
And 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 pipe (7
In 1), the stopper (76) is fixed to the inner circumference with screws (77),
A window (78) formed in the intermediate peripheral wall communicates the inside of the powder drop pipe (71) with the inside of the powder container (25). The powder descending the powder drop pipe (71) is fed into the container (25) through the window (78).

The powder is supplied from the container (18) to the container (25) by placing the powder in the space between the valve box (23) and the pipe (71).
After storing once by opening the valve (46), the powder from the container (18) is sent out through the window (78) in a dispensing state in a state where the supply from the container (18) is blocked by closing the valve (46). When the powder in the space inside the valve box (23) and the pipe (71) approaches the air, the valve body (46) is automatically opened and supplied again into the space. The command to open the valve is the container (25)
The level of the powder (79) is detected by the sensors of the light emitter (36) and the light receiver (37) facing each other, and when it falls below that level, it is electrically transmitted to the solenoid (34). When the powder reaches the level (82) of the light emitter (80) and the light receiver (81) sensor, 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 shaft (85) and the bearing hole (86) of the fixed shaft (83) and the rotatable air flow adjusting shaft (84) shown in FIG. 9 are arranged so that they are aligned on the same axis. It is fitted. 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. axis
A circular hole (89) communicating with the hole (87) is formed in the peripheral wall (83), and a circumferential adjustment groove (90) communicating with the hole (88) is also formed in the shaft (84). . Air is sent from the hole (89) of the shaft (83) into the hole (87), and from this hole (87) to the hole (88) of the adjacent shaft (84),
It is sent out from the groove (90). The adjustment groove 90 may be formed such that its width gradually expands as shown in FIG. 10 or it continuously expands.

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).

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 hole (89) for air intake of the fixed shaft (83) is
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).

The adjusting groove (90) is the groove portion having the maximum width in FIG.
The position (97) communicates with the vent hole (96), and the finger line (95) of the knob (21) coincides with the scale of 10. When the adjusting shaft (84) is rotated by the knob (21), the vent hole (96) is relatively in relation to the adjusting groove (90) from a position where the scale 0 does not communicate at all to a position where the scale 10 communicates with the maximum area. You can move between them (Fig. 10). 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) powdered 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.

[0033]

According to the present invention, in a spraying device for sucking powder blown up by jet air by a jet stream and sending it to a spraying means and a direction, the amount of jetting air for spraying can be adjusted by a rotatable adjustment shaft. The amount of spraying of the powder is adjusted by adjusting the circumferential direction of the adjusting groove and the ventilation hole partially communicating with the adjusting groove by adjusting means for increasing or decreasing the communicating area. Since it is configured, fine adjustment of the spraying amount of the powder and its operation are easy.

[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.

FIG. 9 is a perspective view of a fixed shaft and an adjustment shaft of the present invention.

FIG. 10 is an explanatory diagram showing a communication relationship between an adjustment groove and a ventilation hole.

[Explanation of symbols]

1 Printing Paper 2 Chain 3 Chain Gear 5 Powder Dispersing Nozzle 6 Powder 7 Air Outlet 8 Air Carter 9 Cam 12 Valve 15 Blower 16 Air 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 2
3 Valve box 24 Main body 25 Powder container 28 Mixer 29 Distributor 34 Solenoid 35 Extension 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 76 Stopper 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

Claims (3)

[Claims] 1. A powder accommodating chamber, a flow path for sending air into the accommodating chamber to blow up the powder, and a flow path for sucking up the powder in the accommodating chamber with a jet stream and sending the powder toward a spraying means. The adjusting means comprises means for adjusting the flow rate of air in the powder flow path.
An internal space into which air is sent, a rotatable adjustment shaft having an adjustment groove in the circumferential direction of the peripheral wall that communicates with the internal space and sends out the air, and a ventilation hole that partially communicates with the adjustment groove, The powder-spreading device of the printing machine, wherein the width of the adjusting groove is formed such that the area communicating with the ventilation hole is expanded or reduced according to the rotation thereof. 2. The powder-spreading device for a printing press according to claim 1, wherein the adjustment groove is formed so as to expand or contract stepwise or continuously as its width advances in the circumferential direction. 3. The adjusting shaft has a knob for rotating operation fixed to one end thereof, an internal space is formed at the other end thereof, and an adjusting groove is formed in a peripheral wall portion surrounding the internal space to extend the adjusting shaft. On the line, fixed shafts are arranged in abutting relationship with each other, and the fixed shaft has an internal space communicating with the internal space of the adjusting shaft and a vent hole for communicating the space with a flow path for powder delivery,
3. The powder spraying device for a printing press according to claim 2, wherein a part of the air in the flow path is sent out from the ventilation hole of the fixed shaft to the internal space of the adjustment shaft and into the powder accommodating chamber through the ventilation hole.