JP3457234B2 - Roll coater - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll coater for applying a coating on the front surface or front and back surfaces of a plate-shaped object to be coated such as a building board.

[0002]

2. Description of the Related Art A conventional roll coater as shown in FIG.
(91) a lower roll (92), an upper roll (93), and a doctor roll (94) adjacent to the upper roll (93) from the side
The shaft (92A) of the lower roll (92) is supported by the bearing (96) of the main frame (95), and the upper roll (92) is
The shaft (93A) of (93) is supported by a sliding bearing (98) mounted on the upper sliding frame (97) so that it can slide up and down, and the shaft (94A) of the doctor roll (94) is slid sideways. A moving bearing (99) is supported by a sliding bearing (100) horizontally slidably mounted, and a paint receiver (101) is installed below the lower roll (92). . A wire (104) is stretched in a loop above the roll coater (91) to prevent an accident, and the wire (104) is interposed in an electric supply circuit to a motor for driving and rotating the roll. The limit switch LS is attached.

In the roll coater (91), the handle (102) is turned to rotate the upper roll (93) and the lower roll (9).
2) Adjust the gap between the upper roll (93) and the doctor roll (94) by turning the handle (103), and use the upper roll (93) as a paint roll. The roll (9
3) and the doctor roll (94) are supplied with a coating material, and the upper roll (93) is used as a feed roll between the roll (93) and the lower roll (92). The coating object W is sent to transfer the coating material adhering to the surface of the upper roll (93) to the surface of the coating object W, or the lower roll (92) also serves as a coating roll of the coating object W. Lower roll on the back (92)
Transfer the paint adhered to.

[0004]

In the above-described conventional roll coater (91), when the operator pinches his hand between the rolls, the wire (104) is manually operated by the operator himself or another operator. By pulling and turning off the switch, the rotation of the roll is stopped to prevent a worker's hand from being caught between the rolls and causing a serious injury. However, in such a case, the worker is upset and it is often impossible to pull the wire (104) so quickly that it cannot be said to be a reliable safety measure.

[0005]

As a means for solving the above-mentioned conventional problems, the present invention comprises an upper feed roll (2) or a coating roll and a lower feed roll or a coating roll (3). The feed roll (2) or the coating roll and / or the lower feed roll or the coating roll (3) is adjacent to the doctor roll (4), and the upper feed roll
(2) or between paint roll and doctor roll (4) and /
Alternatively, the paint is supplied between the lower feed roll or the coating roll (3) and the doctor roll (4), and the upper feed roll is supplied.
(2) Or a roll coater for feeding a plate-like object W to be coated between the coating roll and the lower feed roll or coating roll (3) to coat one or both sides of the object W
In (1), the upper feed roll (2) or coating roll and / or the lower feed roll or coating roll
A drive transmission mechanism that supports (3) by a slidable frame (19, 9) and drives the upper feed roll (2) or coating roll and / or the lower feed roll or coating roll (3) The sliding means S is interposed between the sliding means S and the rotational speeds of the driving side of the sliding means S and the driven side of the sliding means S are detected and compared, and the sliding means S is calculated from the rotational speed of the driving side of the sliding means S.
When the rotational speed on the driven side decreases, the upper feed roll
(2) Or the coating roll and / or the lower feed roll or the frame (19, 9) of the lower coating roll (3) is slid so that the upper feed roll (2) or the lower coating roll and the lower feed Between the roll or the coating roll (3) or between the upper feed roll (2) or the coating roll and the doctor roll (4) and / or the lower feed roll or the coating roll
It provides a roll coater (1) extending between the (3) and the doctor roll (4). Further, the upper feed roll (2) or coating roll and the lower feed roll or coating roll (3) are supported by different frames (19, 9), respectively, and the upper feed roll (2) or coating roll is coated. It is desirable that the roll frame (19) and / or the lower feed roll or coating roll (3) frame (9) be slidable in a direction away from each other.

[0006]

[Operation] When the operator feeds the upper feed roll (2) or the coating roll and the lower feed roll or the coating roll (3), or the upper feed roll (2) or the coating roll and the doctor roll (4), If a hand is sandwiched between the doctor roll (4) and the feed roll or coating roll (3) between the lower side and / or the lower side, a load is applied to the driven side by the sliding means S due to the resistance, and rotation of the driven side occurs. The number is lower than the rotation speed on the drive side. When a decrease in the number of rotations on the driven side is detected,
The upper feed roll (2) or the coating roll and / or the frame (19, 9) supporting the lower feed roll or the coating roll (3) slides so that the upper feed roll (2) or the coating roll To the lower feed roll or paint roll (3), or between the upper feed roll (2) or paint roll and the doctor roll (4) and / or the lower feed roll or paint roll (3) Between the doctor roll (4) and the doctor roll (4) and at the same time stop the motor (35) to prevent the operator from being caught between the rolls and to minimize injury.

[0007]

EXAMPLE The present invention will be described with reference to an example shown in FIGS. 1 to 7. The roll coater (1) is mainly composed of an upper feed roll (2), a lower coating roll (3) and the coating roll.
It consists of a doctor roll (4) adjacent to the side of (3).

The shaft (2A) of the feed roll (2) is attached to the upper ends of a pair of left and right fixed frames (6) standing on the base (5) via an elevating base (24). Lifting frame (19)
It is supported by bearings (7). As shown in FIG. 2, a pair of left and right worm gears (21) are installed in the fixed frame (6), and a rotary rod (23) having a handle (22) is attached and supported at one end thereof. Under the gear (27) of the worm gear (21), the unillustrated male screw rod (25) is attached to the support plate (26).
It is screwed onto the screw block (26A) to be mounted on. The rotation of the handle (22) raises and lowers the lift base (24), and the lift base (24) has lower ends of a pair of front and rear rods (28, 28) suspended from the lift frame (19). Are connected.

Reference numeral (29) is an air cylinder fixed in the fixed frame (6), and the rod (30) of the air cylinder (29) is connected to the lower surface of the elevating frame (19).
Further, brackets (32) to which a rack (31) is attached are vertically provided at one end of each of a pair of left and right lifting bases (24), and the rack (31) is transferred to a fixed frame (6, 6). The gears (34) at both ends of the supported rotating rod (33) are in mesh with each other.

The shaft (3A) of the coating roll (3) has a pair of left and right rails (15, 15) laid on the base (5) as shown in FIG.
15) On the upper ends of the pair of left and right sliding frames (18, 18) standing on the sliding base (17) slidably mounted on the grips (16, 16). The shaft (4A) of the doctor roll (4) is supported by an attached bearing (20), and the shaft (4A) of the doctor roll (4) is arranged at the upper end of the sliding frame (18) as a pair of left and right slides. Sliding bearings (11) slidably supported between upper and lower guide rails (10, 10) of sliding bearing frames (9) slidably arranged on rails (8), respectively.
Supported by.

The sliding bearing frame (9) is the sliding frame.
By the air cylinder (12) attached to (18), reciprocating sliding is possible from the position shown in dotted line in Fig. 31 approaching the coating roll (3) to the position shown in solid line in Fig. 3 departing from the coating roll (3). The dynamic bearing (11) rotates the handle (13) forward and backward, and the screw shaft (14) is passed through a worm gear (not shown).
Can be reciprocally slid in the direction toward and away from the coating roll (3) by rotating in the normal and reverse directions.

A motor (35) with a variable speed reducer, which is a driving source of the roll coater (1), is installed on a base (5), and a sprocket (36) is attached to a rotary shaft of the motor (35) as shown in FIG. )
Is installed. Further, the base (5) has a rotation transmission shaft (3
7) is supported via a pair of left and right bearings (38, 38),
A rotation transmission sprocket (39) is loosely fitted to the rotation transmission shaft (37), and cup springs (40, 40) fixed to the rotation transmission shaft (37) are provided on both sides of the sprocket (39). They are in pressure contact, and the sprocket (39) and the cup springs (40, 40) form a sliding means S. A roll driving side sprocket (41) is attached to one end of the rotation transmission shaft (37), and a plurality of holes (4
2A) marked disc (42) is attached to the base
Proximity or photoelectric sensor (44) is extended toward the disk (42) from the column (43) standing on the (5).

Further, a double sprocket (45, 46) and a tension sprocket (47) are supported on the sliding frame (18), and two guide sprockets are provided on the fixed frame (6).
(48,49) are supported. A drive chain (50) is suspended between the sprocket (36) of the motor (35) and the rotation transmission sprocket (39), as shown in FIGS. 1 and 5, and the roll drive side sprocket (41) and the guide sprocket ( 48,4
9), sprocket (51) for feed roll (2), paint roll
(3) sprocket (52), one of double sprocket (45)
The main chain (53) is suspended in the
(4) sprocket (54), one of the double sprockets (4
6), the auxiliary chain (55) is suspended on the tension sprocket (47).

The main chain (53) has a slack, and the main chain (53) is a tension sprocket attached to the tip of an arm (56) pivotally attached to the fixed frame (6). Tension is exerted by (57),
A chain (59) having a weight (58) attached to the lower end is connected to the tip of the arm (56), and the chain (59) is connected by a guide sprocket (60) attached to the fixed frame (6). Guided. A hook rod (61) is rotatably attached to the middle portion of the arm (56),
The tension sprocket (57) is pulled through the chain (59) by the weight of the weight (58). And Figure 1
In the normal state shown in Figure 5, the hook (62) of the hook rod (61) is slid on the frame while tension is applied to the main chain (53).
The arm (56) by engaging the engaging rod (63) of (18)
Fixing the sliding frame (18) and the fixed frame (6)
Connect and fix.

In the normal state, the handle (22) is rotated normally and reversely to raise and lower the feed roll (2) through the raising and lowering base (24), the rods (28, 28) and the raising and lowering frame (19) to move the plate. Feed roll in consideration of the thickness of the coating object W and the coating amount of paint
Adjust the space between (2) and the coating roll (3). The spacing can be checked by the gauge (64) on the handle (22). At this time, the left and right elevating frames (19) ascend and descend in synchronization, but the gears on both ends of the left and right racks (31) and the rotating rod (33)
The left and right elevating frames (19) can be smoothly moved up and down synchronously by the (34). Further, rotate the handle (13) forward and backward to slide the doctor roll (4) in the direction of the coating roll (3) or the opposite direction through the screw shaft (14) and the sliding bearing (11). The distance between the coating roll (3) and the doctor roll (4) is adjusted in consideration of the coating amount of the paint.

After preparing the coating as described above, the motor (35) is driven to rotate the feed roll (2), the coating roll (3) and the doctor roll (4) in the directions shown by the arrows in FIG. A paint is supplied between the coating roll (3) and the doctor roll (4), and the feed roll (2) and the coating roll (3)
A plate-shaped object W to be coated is sent between the two and the surface of the object W to be coated (lower surface) is coated. Between the feed roll (2) and the paint roll (3) or the paint roll during the above painting process
When a foreign substance H such as a worker's hand is caught between (3) and the doctor roll (4), rotation resistance is applied to each roll (2, 3, 4), and the rotation transmission sprocket ( 39) and cup springs
A slip occurs between (40, 40) and the speed difference between the rotation transmission sprocket (39) and the rotation transmission shaft (37) due to the slip, that is, the driving side from the sliding means S and the driven side from the sliding means S. The speed difference with the side is detected by the number of rotations of the marker disc (42). The number of rotations of the marker disc (42) is detected by, for example, a proximity sensor (44).

The rotary sprocket (39) and the rotary transmission shaft (3
When it is detected by the rotation speed of the marker disc (42) that the speed difference between 7) is generated, the air cylinder (12, 29) is operated by the control unit (not shown), and as shown in FIG. 19) to raise the feed roll (2) to increase the distance between the feed roll (2) and the coating roll (3), and further through the sliding bearing frame (9) to the doctor roll.
Slide (4) away from the coating roll (3) to increase the distance between the coating roll (3) and the doctor roll (4), and at the same time stop the motor (35) and roll (2, 3, 4) Prevent foreign matter H such as hands from being caught between them.

When replacing the coating roll (3), see FIG.
The weight (58) is placed on the base (64) as shown in Fig. 6, and the hook (62) of the hook rod (61) is disengaged from the engaging rod (63). The tension exerted by the tension sprocket (57) on the sprocket (57) is removed, the main chain (53) is slackened, and the main chain (53) is sprocket (52) of the coating roll (3) and the feed roll (2). Remove from the sprocket (51) and slide the sliding frame (18) away from the fixed frame (6). Then, the feed roll (2) can be removed from the upper side of the coating roll (3) without removing it from the fixed frame (6). Feed roll like this
With (2) removed from the upper side of the coating roll (3), remove the coating roll (3) from the sliding frame (18) and replace it with another one.

The above embodiments do not limit the present invention. For example, the sliding means may be constituted by a pulley and a belt slidably suspended on the pulley. Further, the upper feed roll may also be a coating roll, and a doctor roll may be adjacent to the side of the upper coating roll to coat the upper and lower surfaces of the plate-shaped object to be coated, or the upper roll may be used as a coating roll. The doctor roll may be adjacent to the side of the roll, and the lower coating roll may be used as a feed roll to coat only the upper surface of the plate-shaped object to be coated on one side. Further, in the above-mentioned embodiment, the upper feed roll is attached to the frame capable of moving up and down, but the lower coating roll may be attached to the frame capable of moving up and down, or both rolls may be attached to the frame capable of moving up and down. Furthermore, one or both frames may be slidable in the horizontal direction. Further, the sliding moving means may use not only pneumatic pressure but also other power such as hydraulic pressure and electric power. Further, each roll such as the upper roll, the lower roll, and the doctor roll may be driven by different driving sources. In this case, the sliding means is interposed in the drive transmission mechanism of one or both rolls. A pulley and a belt may be used to transmit the rotation.

FIG. 8 shows still another embodiment. The embodiment relates to a double-sided coating roll coater (71) in which doctor rolls (74A, 74B) are adjacent to the upper and lower coating rolls (72, 73), and the roll coater (71)
In Fig. 3, the upper and lower doctor rolls (74A, 74B) are mounted on a horizontally sliding frame (87A, 87B) as shown in Fig. 3, and a foreign substance H is caught between adjacent rolls. The lowering of the rotation speed on the driven side from the time slip means S is checked, and the upper coating roll (72) and doctor roll (74)
A) and between the lower paint roll (73) and the doctor roll (74B) are enlarged and the upper paint roll (72)
The doctor roll (74A) also expands between the lower coating roll (73) by sliding the lifting frame (89). In the roll coater (71), turn the handle (75) to rotate the screw shaft.
Insert the screw block (77) into the slide rail (7
When sliding along 8), the tension sprocket (79) attached to the side of the female screw block (77) also moves, loosening the main chain (80), and moving the main chain (80) upward and downward. Side of the coating roll (72,73) from the sprocket (81,82), and remove the hook (85) for fixing the fixed frame (83) and the sliding frame (84) from the engagement pin (86). The sliding frame (84) is slid to separate from the fixed frame (83).

[0021]

As described above, according to the present invention, the sliding means is interposed in the drive transmission means of the roll. Therefore, when foreign matter such as a hand is caught between the rolls, the number of rotations on the driving side and the driven side is increased. Difference occurs, this difference is detected and the gap between the rolls is expanded,
At the same time, since the motor is stopped, it is possible to reliably prevent the roll from being caught and injured.

[Brief description of drawings]

1 to 7 show an embodiment of the present invention.

FIG. 1 is a side view illustrating a normal state.

FIG. 2 is a perspective view illustrating an upper roll elevating mechanism.

[Figure 3] Doctor roll mounting structure explanatory diagram

[Fig. 4] Illustration of the sliding frame installation structure

FIG. 5 is an explanatory view of a rotation transmission mechanism.

FIG. 6 is an explanatory diagram of a state where the roll interval is enlarged.

FIG. 7 is an explanatory view of the separation movement between the frames.

FIG. 8 is an explanatory view of another embodiment of the chain suspension mode.

FIG. 9 is an explanatory side view of a conventional example.

[Explanation of symbols]

1,71 roll coater 2,72 upper feed roll or paint roll 3,73 lower paint roll 4,74A, 74B Doctor roll 9,19,87A, 87B, 89 frames S sliding means W coating object

Claims (2)

(57) [Claims] 1. An upper feed roll or coating roll and a lower feed roll or coating roll, wherein the upper feed roll or coating roll and / or the lower feed roll or coating roll is a doctor roll. Adjacent,
The paint is supplied between the upper feed roll or coating roll and the doctor roll and / or between the lower feed roll or coating roll and the doctor roll, and the upper feed roll or coating roll and the lower feed roll or In a roll coater for feeding a plate-shaped object to be coated with a coating roll to coat one or both sides of the object, the upper feed roll or coating roll and / or the lower feed roll or coating roll Is supported by a slidable frame, and a sliding means is interposed in a drive transmission mechanism for driving the upper feed roll or coating roll and / or the lower feed roll or coating roll. The number of rotations with respect to the driven side of the sliding means is detected and compared, and the number of rotations of the driving side with respect to the driving side of the sliding means When the number of turns decreases, the frame of the upper feed roll or coating roll and / or the lower feed roll or coating roll slides so that the upper feed roll or coating roll and the lower feed roll or coating A roll coater characterized by expanding between the roll or between the upper feed roll or coating roll and the doctor roll and / or between the lower feed roll or coating roll and the doctor roll. 2. The upper feed roll or coating roll and the lower feed roll or coating roll are supported by separate frames, and the upper feed roll or coating roll frame and / or the lower frame The roll coater according to claim 1, wherein the frame of the feed roll or the coating roll is slidable in a direction in which the frames are separated from each other.