JP4647390B2 - Screen cleaning device - Google Patents

Description

  The present invention relates to an apparatus for cleaning a screen of a screen printing machine with a strip-shaped wiping sheet, and more particularly to attachment / detachment of a winding roll for winding a wiping sheet to a screen cleaning apparatus.

This type of screen cleaning apparatus is already known as described in Patent Document 1 below. The winding roll described in Patent Document 1 is attached to the screen cleaning device by a fixed support member and a movable support member provided in the apparatus main body. The fixed support member is provided on the apparatus main body so as to be rotatable and immovable in the axial direction. The movable support member is provided on the apparatus main body so as to be rotatable around an axis line concentric with the fixed support member and movable in the axial direction. . The movable support member includes a shaft provided in the apparatus main body so as to be movable in the axial direction, and a receiving member provided in the tip end portion of the shaft so as to be relatively rotatable, and a spring provided between the apparatus main body and the movable support member. The biasing force is applied in a direction approaching the fixed support member. When the take-up roll is attached to the apparatus main body, the movable support member is retracted against the urging force of the spring to create a space in which the take-up roll can be inserted between the fixed support member. In this state, after one end of the winding roll is fitted to the fixed support member so as not to be relatively rotatable, the movable support member is advanced by the bias of the spring, and the receiving member is engaged with the other end of the winding roll. When removing the take-up roll from the apparatus body, the movable support member is retracted against the urging force of the spring, and the take-up roll is removed from the fixed support member in a state where the receiving member is detached from the take-up roll. Remove from the main unit.
JP 2001-287345 A

However, in the screen cleaning device described in Patent Document 1, when the take-up roll is attached to and removed from the screen cleaning device, the movable support member is retracted against the urging force of the spring, and the state is maintained in the take-up state. The roll needs to be fitted and detached from the fixed support member, which is troublesome. Further, when operating the movable support member, the operator's hand is difficult to enter, and workability may be poor.
The present invention has been made against the background of the above circumstances, and an object of the present invention is to provide a screen cleaning device in which a winding roll for winding a wiping sheet can be easily attached and detached.

  In order to solve the above-mentioned problems, the present invention provides a screen cleaning device that wipes and cleans a screen printing machine screen with a wiping sheet, and rotates (a) the device main body and (b) the device main body. At least two supported by a pair of supported rotating bodies provided on two portions separated in the axial direction of a winding roll that is rotatably held around an axis and winds up a wiping sheet on its outer peripheral surface. And (c) positioning each of the supported rotating bodies supported by the corresponding supporting rotating bodies and the winding in the positioning state. A positioning device that allows the winding roll to be detached from the apparatus main body when a force in one direction perpendicular to the axis of the winding roll is applied to the roll; and Take sheet A wiping sheet supply device to be fed, and (e) a rotational drive device held by the device main body, and of at least two supporting rotating bodies, two portions separated in the axial direction of the winding roll The gist is to use at least one of the pair of supported rotating bodies provided as a driving rotary body that transmits rotational torque to at least one of them and to rotate the driving rotary body by a rotary driving device. is there.

The supported rotating body supported by the driving rotating body is the driven rotating body.
Two supporting rotating bodies are provided for each of the supported rotating bodies, and it is possible that the two support a rotating body that is supported one by one. The two supporting rotating bodies can also serve as a positioning device. However, as will be described later, it is often possible to reduce the apparatus cost by supporting each supported rotating body by one supporting rotating body and separately providing a positioning device.
The two portions separated in the axial direction of the take-up roll may be both ends of the take-up roll, or at least one of them may be a portion inside the end. In the former case, for example, the winding roll can have the same length as the width of the wiping sheet, and waste is small. Further, at least one positioning member for positioning the wiping sheet in the axial direction of the winding roll may be provided on the winding roll so as to be movable in the axial direction. In the latter case, two supported rotating bodies are respectively provided at two positions on the winding roll that are separated by the same distance as the width of the wiping sheet, and are used for winding a plurality of types of wiping sheets having different widths. Common winding rolls that are the same can be used. In this case, at least one of the two supported rotating bodies may be provided so as to be relatively movable in the axial direction of the winding roll, and may be positioned at a position corresponding to the width of the wiping sheet.
The wiping sheet supply device may be configured such that the supply roll around which the wiping sheet is wound is supported in the same manner as the winding roll, or the sheet storage member in which the wiping sheet is folded and stored is detachable. The apparatus by which a wiping sheet | seat is pulled out from a sheet | seat accommodating member may be sufficient.
The drive rotator may be a gear, and may be a rotator having a circular cross section in which at least the outer peripheral surface is a high friction coefficient layer.
If both of the supporting rotating bodies corresponding to each of the pair of supported rotating bodies are driving rotating bodies, rotational torque can be transmitted to the winding roll at two portions separated in the axial direction. Is more stable but not essential.

  In attaching the winding roll to the apparatus main body in the screen cleaning apparatus according to the present invention, the pair of supported rotating bodies of the winding roll are respectively supported by the supporting rotating bodies, and when releasing the support, the supporting rotating bodies What is necessary is just to separate from. The positioning device positions the supported rotating body in a state of being supported by the corresponding supporting rotating body, and in that positioning state, a force in one direction perpendicular to the axis of the winding roll is applied to the winding roll. In such a case, the take-up roll is allowed to be detached from the apparatus main body. That is, as in the above-described conventional apparatus, when the supported rotating body is supported by the supporting rotating body and separated, the movable support member does not have to be retracted against the biasing force of the spring, and there is no trouble. Further, when operating the movable support member, the operator's hand is difficult to enter and the work is not difficult, and the take-up roll can be easily and quickly attached to and detached from the apparatus main body.

Aspects of the Invention

  In the following, the invention that is claimed to be claimable in the present application (hereinafter referred to as “claimable invention”. The claimable invention is at least the “present invention” to the invention described in the claims. Some aspects of the present invention, including subordinate concept inventions of the present invention, superordinate concepts of the present invention, or inventions of different concepts) will be illustrated and described. As with the claims, each aspect is divided into sections, each section is numbered, and is described in a form that cites the numbers of other sections as necessary. This is for the purpose of facilitating the understanding of the claimable invention, and is not intended to limit the combinations of the constituent elements constituting the claimable invention to those described in the following sections. In other words, the claimable invention should be construed in consideration of the description accompanying each section, the description of the embodiments, etc., and as long as the interpretation is followed, another aspect is added to the form of each section. In addition, an aspect in which constituent elements are deleted from the aspect of each item can be an aspect of the claimable invention.

  In each of the following paragraphs, paragraph (1) corresponds to claim 1, paragraph (2) corresponds to claim 2, paragraph (4) to claim 3, paragraphs (5) to (8). The combination is equivalent to claim 4, the claim (9) is equivalent to claim 5, and the combination of terms (10) and (11) is equivalent to claim 6.

(1) A screen cleaning device that wipes and cleans a screen printing machine screen with a wiping sheet,
The device body;
In the apparatus main body, a pair of supported rotating bodies provided in two portions separated in the axial direction of a winding roll that is rotatably held around the rotation axis and winds up the wiping sheet, At least two support rotators in contact and support;
Each of the supported rotating bodies held by the apparatus main body is positioned in a state of being supported by the corresponding supporting rotating bodies, and in the positioning state, the winding roll is orthogonal to the winding roll axis. A positioning device that allows the winding roll to be detached from the device body when a unidirectional force is applied;
A wiping sheet supply device that is held by the apparatus body and supplies the wiping sheet;
A pair of supported rotating bodies provided in two portions of the at least two supporting rotating bodies separated in the axial direction of the take-up roll. A screen cleaning device that corresponds to at least one of the above is a drive rotating body that transmits rotational torque to at least one of which, and the drive rotating body is rotated by the rotation driving device.
(2) There are two support rotating bodies, and the positioning device is
A total of two pairs of positioning rollers in contact with each outer peripheral surface of each of the supported rotating bodies;
A fixed mounting device in which one of each pair of positioning rollers is fixedly mounted to the device main body to be a fixed positioning roller;
A movable attachment device that attaches the other of the pair of positioning rollers to the device main body so as to be movable in a substantially radial direction of the supported rotating body to be a movable positioning roller;
An urging device that urges the movable positioning roller toward the supported rotating body, and among the supporting rotating body, the fixed positioning roller, and the movable positioning roller, each other in a circumferential direction of the supported rotating body The screen cleaning apparatus according to item (1), wherein the sum of any two angular intervals between adjacent two is greater than 180 degrees.
The supported rotating body fulfills the function of a wedge when supported by the supporting rotating body, and the movable positioning roller can be separated from the supported rotating body against the biasing force of the biasing device and can enter between the fixed positioning roller. In the direction perpendicular to the rotation axis between the support rotating body, the fixed positioning roller, and the movable positioning roller by the biasing force of the biasing device. It is kept positioned. In addition, since these two supported rotating bodies are all larger than 180 degrees, the sum of any two angular intervals between the two adjacent to each other in the circumferential direction of the supported rotating body is larger than the supported rotating body. Unless a force exceeding the urging force of the urging device is applied, the supported rotator is prevented from being separated from the support rotator, and the supported rotator is supported by the support rotator. This positioning device also functions as a separation prevention device. When removing the take-up roll from the screen cleaning device, if a force is applied to the take-up roll in a direction away from the support rotator, the supported rotator urges the movable positioning roller by the wedge action as in the case of attachment. While moving backward against the urging force of the apparatus, it escapes from between the movable positioning roller and the fixed positioning roller. Also in the screen cleaning apparatus provided with the positioning device of this section, the winding roll can be easily attached to and detached from the apparatus main body only by the operation of bringing the supported rotating body closer to and away from the supporting rotating body.
It is also possible to use both the movable mounting device and the biasing device. For example, a movable positioning roller is rotatably held by a leaf spring, and the leaf spring is used as a biasing device / roller holding member.
(3) The winding roll includes shaft portions at both ends, the support rotating bodies are two, and the positioning devices are respectively provided in the device main body. The screen cleaning apparatus according to item (1), including a guide groove that is movably received in a substantially radial direction of the support rotating body.
It is also possible to keep the supported rotating body supported by the supporting rotating body by its own weight. In this case, the winding roll can be detached from the apparatus main body if a force that overcomes its own weight is applied in one direction perpendicular to the axis of the winding roll and in the longitudinal direction of the guide groove. However, it is desirable that the positioning device includes a lift prevention device that prevents the supported rotating body from being lifted from the support rotating body. If the guide groove has a component in the vertical direction and the weight of the winding roll keeps the supported rotating body supported by the supported rotating body, the anti-lifting device is not indispensable, but it is provided It is particularly desirable when the support rotator is a drive rotator and the supported rotator is a driven rotator.
When the shaft portion is fitted into the guide groove and guided, the approach of the supported rotating body onto the supporting rotating body is guided, and the supported rotating body is moved by the engagement between the shaft portion and the groove side surface. It is positioned in a state of being supported by the support rotating body.
(4) An annular groove is formed on the outer peripheral surface of the support rotator, and the supported rotator is fitted into the annular groove, thereby positioning the supported rotator in the axial direction (2 ) Or (3) screen cleaning device.
When the supported rotating body is fitted into the annular groove, the winding roll does not move in the axial direction, and the wiping sheet can be stably wound. A positioning device for positioning the supported rotating body in the axial direction can be provided separately from the supporting rotating body, but the configuration becomes complicated. On the other hand, according to the invention of this section, the supported rotating body can be positioned by fitting into the annular groove, and the supported rotating body can be supported by the supporting rotating body easily and quickly. At the same time, axial positioning can also be performed.
(5) The screen cleaning device according to (2) or (3), wherein the two support rotating bodies are configured by two portions separated in the axial direction of one support roll.
The two portions separated in the axial direction may be both ends in the axial direction, and at least one of them may be a portion inside the ends.
The support roll of this section may be an integral member, or a plurality of members integrally assembled. In the latter case, for example, the support roll includes a shaft member constituting the shaft portion and two support rotators, and the support rotator is positioned in a multi-stage or no position with respect to the shaft member in the axial direction. If it is possible to adjust in stages, it is possible to cope with the difference in distance between the two supported rotating bodies. When the two supported rotating bodies also function as positioning members for positioning the wiping sheet in the width direction, the distance between the two supported rotating bodies varies depending on the width of the wiping sheet. It is possible to set a plurality of types of wiping sheets having different widths in the screen cleaning device, corresponding to the difference in distance by one support roll.
Two supporting rotating bodies may be separated and attached to the apparatus main body separately. However, in this case, it is necessary to individually attach the two supporting rotating bodies to the apparatus main body, and the configuration becomes complicated. On the other hand, in the screen cleaning apparatus of this section, if one support roll is attached to the apparatus main body, two support rotating bodies are attached to the apparatus main body, and the configuration of the attachment apparatus can be simplified. In addition, by transmitting the driving force of the rotation drive device to one of the support roll or the two support rotation members, the two support rotation members can be rotated, and the configuration of the rotation drive device can be simplified. .
(6) An annular groove is formed on the outer peripheral surface of the two portions of the support roll separated in the axial direction, and the supported rotating body is fitted into the annular groove, The screen cleaning device according to item (5), wherein the support roll is positioned in the axial direction.
In the screen cleaning apparatus described in this section, for example, the operation and effect described in section (4) can be obtained.
(7) The screen cleaning device according to (6), wherein three or more annular grooves are formed, and the pair of supported rotating bodies are fitted into two selected from the annular grooves.
For example, one annular groove is formed on one of two portions separated in the axial direction of the support roll, and two or more are formed on the other, one of the one and one of the other plurality of annular grooves. In addition, each of the supported rotating bodies may be fitted, and as in the screen cleaning device described in the next section, annular grooves are respectively provided at a plurality of pairs of positions symmetrical with respect to one point in the axial direction of the support roll. It may be formed.
A pair of supported rotating bodies having two annular grooves that are paired apart in the axial direction of the support roll and that have a plurality of pairs of annular grooves with different distances between them. It is easy to use a plurality of types of wiping sheets having different widths for cleaning the screen.
When attaching the take-up roll to the screen cleaning device, it is only necessary to select two annular grooves that form a pair with a distance corresponding to the distance between the pair of supported rotating bodies and fit the supported rotating bodies. The advantage of the invention according to item (1) that the take-up roll can be easily attached and detached is not impaired. Moreover, the position adjustment operation | work which makes it possible to adjust the position in the axial direction of the support roll of a support rotary body is unnecessary, and can respond easily to the difference in the width | variety of a wiping sheet. The width of the printing area used for printing on the screen varies depending on the width of the printed area, which is the area where the printing agent of the circuit board is to be printed, and has a width corresponding to the width of the printing area. If is used for cleaning, it is possible to perform cleaning while suppressing waste of the wiping sheet.
In addition, it is also possible to make the support rotator long in the axial direction, do not provide an annular groove, support the supported rotator at any point, and set a plurality of types of wiping sheets having different widths. it can. In this case, the support rotator can be considered as a plurality of support rotators provided integrally.
(8) The annular grooves are formed at a plurality of pairs of positions symmetrical with respect to one point in the axial direction of the support roll, and the pair of supported rotations are paired with the pair of annular grooves selected from the plurality of pairs. The screen cleaning apparatus according to item (7), in which a body is fitted.
One point in the axial direction of the support roll is, for example, the center in the axial direction of the support roll. In this case, the winding roll is supported at the center of the support roll regardless of its length, and the screen cleaning device is It can be configured symmetrically.
(9) The drive rotator and the supported rotator corresponding to the drive rotator are gears each having teeth formed on an outer peripheral surface thereof. Screen cleaning device.
This is an aspect in which the driving rotator is composed only of a gear, and the supported rotator is supported by the gear itself, and there is an advantage that the configuration is simple. However, it is not limited to that. For example, the drive rotator includes a support portion whose outer peripheral surface is a cylindrical surface, and a gear portion that is concentric and integral with the support portion, and a supported rotator supported by the drive rotator. Alternatively, it is possible to include a supported portion and a gear portion, and the gears can mesh with each other in a state where the supported portion is supported by the support portion.
According to the invention of this section, the rotational torque is reliably transmitted from the drive rotating body to the supported rotating body by the meshing of the gears.
In an embodiment in which this item is dependent on item (2), the positioning device prevents the supported rotating body from being separated from the supporting rotating body, so that the gears are kept in mesh with each other, and the rotational torque is more reliably generated. Communicated.
(10) The wipe sheet supply device is
A pair of supported rotating bodies provided in two portions separated in the axial direction of the supply roll on which the wiping sheet is wound, at least two supporting rotating bodies that are in contact with and support each other on their outer peripheral surfaces;
Each of the supported rotating bodies held by the apparatus main body is positioned in a state of being supported by the corresponding supporting rotating body, and in this positioning state, the supply roll is orthogonal to the axis of the supply roll. A screen cleaning device according to any one of (1) to (9), including a positioning device that allows the supply roll to be detached from the device main body when a directional force is applied.
At least one of the support rotating body for the supply roll and the positioning device can have the same configuration as that for the take-up roll. In particular, if at least one component of the support rotating body for the supply roll and the positioning device is made common, the device cost can be reduced. Further, the feature described in the item (2) or (3) can be applied to the positioning device of this item. Furthermore, it is also possible to use the supply roll that has finished supplying the wiping sheet as the winding roll, or to remove the wiping sheet wound up by the winding roll and use it as the supply roll.
In the screen cleaning apparatus described in this section, the supply roll around which the wiping sheet is wound can be easily and quickly attached to the apparatus main body and positioned similarly to the winding roll.
In the screen cleaning apparatus described in Patent Document 1, a wiping sheet is wound around a supply roll, and the supply roll is attached to the apparatus main body in the same manner as the winding roll. Therefore, both the take-up roll and the supply roll are troublesome to attach and detach, and the time required for the wiping sheet replacement work becomes longer. On the other hand, according to the invention of this section, the wiping sheet is wound and supplied to the supply roll, but it can be easily attached to and detached from the apparatus body in the same manner as the take-up roll. Even if used, it can be quickly attached and detached.
The features described in each of the items (2) to (9) can be applied to the support rotating body of this item.
(11) A supporting rotating body corresponding to at least one of the pair of supported rotating bodies provided at two portions separated in the axial direction of the supply roll, including a braking device held by the apparatus main body, The screen cleaning device according to item (10), wherein the screen cleaning device is a braking torque transmitting body that transmits braking torque of the braking device to one side.
If the winding roll is rotated, the wiping sheet is pulled by the winding roll, the supply roll is rotated, and the wiping sheet is pulled out from the supply roll. At this time, the braking torque is transmitted to the supported rotating body from the supporting rotating body, whereby a force opposite to the direction in which the wiping sheet is pulled out acts on the supply roll, and tension is applied to the wiping sheet. . Further, when the take-up roll is stopped, the supply roll keeps rotating due to inertia, and the wiping sheet is prevented from sagging.
(12) A roll having a circular cross-sectional shape and having substantially the same length as the width of a belt-like wiping sheet for wiping off screen dirt of a screen printing machine, and a roll around which the wiping sheet is wound,
A wipe sheet winding body including a pair of gears provided at both ends of the roll.
The pair of gears may be provided integrally with the roll, may be provided separately, and may be detachably attached or detachably attached. In the latter case, it is desirable that the roll has the same length as the width of the wiping sheet, but this is not essential. It can be a little shorter than the width of the wiping sheet, or a little longer. When the roll is slightly shorter than the width of the wiping sheet, for example, each of the pair of gears is provided with fitting protrusions protruding from the central portion, and these fitting protrusions are provided at both ends of the roll. It is only necessary that the end surfaces of the respective gears fulfill the function of a flange that defines the position in the width direction of the wiping sheet. When the roll is slightly longer than the width of the wiping sheet, each pair of gears is provided with a fitting recess at the center, and these fitting recesses are fitted to the outside of both ends of the roll. The end face of the gear may serve as a flange that defines the position in the width direction of the wiping sheet.
When an unused wiping sheet is wound around the roll, the roll constitutes a supply roll and is attached to the screen cleaning device with the roll empty, and when the used wiping sheet is wound around, the roll is wound. Configure the roll.
The wiped sheet winding body can be easily and quickly attached to the screen cleaning device in the same manner as the winding roll described in the item (9).
(13) The wiped sheet winding body according to (12), including a gear attachment device in which the pair of gears are provided separately from the roll and removably attach the gears to the roll.
According to the invention of this section, for example, the roll can be repeatedly used. However, when the roll becomes unusable due to its life or the like, only the roll needs to be replaced, and the replacement cost can be reduced. Or when a roll is a disposable thing, a gear can be removed from a used roll, it can attach to an unused roll, and it can be used, and the cost of a wiping sheet winding body can be reduced.

  Several embodiments of the claimable invention will now be described in detail with reference to the drawings. In addition to the following examples, the claimable invention can be practiced in various modifications based on the knowledge of those skilled in the art, including the aspects described in the above [Aspect of the Invention] section. .

  As shown in FIG. 1, the screen printing machine includes a frame 10 constituting a printing machine body, a substrate transport device (not shown), a substrate support device 12, a substrate support device lifting device 14, a screen support device 16, and a squeegee device 18. , A screen cleaning device 20 and the like are provided. The board transport device transports the circuit board 24 in the horizontal direction in FIG. 1 in the horizontal direction, which is parallel to the solder printing surface of the circuit board 24, and transports the circuit board 24 to the board support device 12. Unload from. The substrate support device 12 supports the circuit board 24 horizontally, is moved up and down by a substrate support device lifting device 14 as a contact / separation device, and is moved in a direction perpendicular to the screen 30 supported by the screen support device 16. Then, the circuit board 24 supported by the board support device 12 is brought into contact with and separated from the screen 30.

  As shown in FIG. 1, the screen support device 16 is provided on the frame 10 at a position above the substrate support device 12. The screen 30 is held by a rectangular screen frame 32, and is horizontally supported by the screen support device 16 in the screen frame 32. Although not shown, the screen 30 is provided with a large number of through holes filled with cream solder, which is a kind of highly viscous fluid as a printing material.

  As shown in FIG. 1, the squeegee device 18 is provided on the frame 10 at a position above the screen support device 16. In this embodiment, the squeegee device 18 includes a pair of squeegee heads 40 (only one is shown in FIG. 1) each having a squeegee 38, a squeegee head lifting device 42 that raises and lowers the squeegee heads 40, and a squeegee. A squeegee head moving device 44 for moving the ridge head 40 in a horizontal direction parallel to the screen 30 supported by the screen support device 16. In the present embodiment, for the screen 30 supported by the screen support device 16, the direction parallel to the substrate transport direction is the width direction. In this embodiment, the squeegee 38 is disposed in such a posture that its longitudinal direction is parallel to the width direction of the screen 30, and is moved in a direction perpendicular to the width direction of the screen 30 in a plane parallel to the screen 30.

The screen cleaning device 20 will be described.
The screen cleaning device 20 is a device that wipes and cleans the screen 30 from the side where the circuit board 24 is brought into contact with the wiping sheet 50 (see FIG. 4). As shown in FIG. 4, the wiping sheet 50 is supplied by being wound around a supply roll 52 and wound up by the winding roll 54.

  The wiping sheet 50 is prepared with a plurality of different widths, in this embodiment, three different types. The size of the print use area, which is the area used for cream solder printing, including the portion where the through hole of the screen 30 is formed, is the size of the area to be printed which is the area on the circuit board 24 where the cream solder is to be printed. Depending on the size, the size of the cleaning area that requires cleaning of the screen 30 also changes. The three types of wiping sheets 50 are selectively used to have a width corresponding to the width of the area requiring cleaning (the dimension in the direction parallel to the substrate transport direction as with the screen 30). The screen 30 is wiped while suppressing waste.

  As shown in FIGS. 4 and 5, the supply roll 52 has a cylindrical shape with a circular cross-sectional shape, and gears 58 (one gear in FIGS. 58 is shown detachably attached. As shown in FIG. 5, one of these gears 58 is provided with a collet member 62 as a locking member concentrically and integrally. The collet member 62 has a hollow cylindrical shape with a circular cross-sectional shape, and has a fitting protrusion 63 protruding from the center of the gear 58. The diameter of the female screw hole 64 and the tip of the collet member 62 is linear. A taper inner peripheral surface 66 that decreases is formed, and a plurality of slits 68 extending in the axial direction are formed in the portion where the female screw hole 64 and the taper inner peripheral surface 66 are formed. 3 are formed at equal angular intervals.

  The diameter of the collet member 62 is increased by the collet driving member 72. The collet drive member 72 includes a head 74 as an operation portion, a male screw portion 76 that protrudes from the head 74, and an inclined tapered protrusion 78 that corresponds to the tapered inner peripheral surface 66. The collet driving member 72 drives the collet member 62 in a state where the fitting protrusion 63 of the collet member 62 is fitted inside the end of the supply roll 52 and the gear 58 is in contact with the end surface of the supply roll 52. . In the collet driving member 72, the male thread portion 76 is screwed into the female thread hole 64, and the taper protrusion 78 is fitted to the taper inner peripheral surface 66 to widen the width of the slit 68. As a result, the diameter of the collet member 62 is expanded and pressed against the inner peripheral surface of the supply roll 52, and the gear 58 is attached to the supply roll 52 so as not to be relatively movable and relatively rotatable in the axial direction by friction between them. The gear 58 can be removed from the supply roll 52 by loosening the screwing of the collet drive member 72 and releasing the engagement of the collet member 62 with the inner peripheral surface of the supply roll 52. The collet member 62 and the collet driving member 72 constitute a collet chuck 80 as a gear attachment device that detachably attaches the gear 58 to the supply roll 52. A wiping sheet supply body 82 is configured including the supply roll 52, the pair of gears 58, and the collet chuck 80.

  The supply roll 52 is made of paper in this embodiment, has the same length as the width of the wiping sheet 50, and the length of the supply roll 52 is changed in three stages for screen cleaning by the screen cleaning device 20. Various types of supply rolls 52 are prepared, and wiping sheets 50 having different widths are wound around them. Further, the maximum diameter of the wiping sheet 50 wound around the supply roll 52 is smaller than the diameter of the root circle of the gear 58 as shown by a two-dot chain line in FIG. Each of the pair of gears 58 has a diameter of the root circle larger than the outer diameter of the supply roll 52 and, when attached to the supply roll 52, protrudes radially outward from both ends of the supply roll 52. . Thereby, the pair of gears 58 is positioned in the axial direction of the supply roll 52 while sandwiching the wiping sheet 50 wound around the supply roll 52 and allowing the wiping sheet 50 to be pulled out from the supply roll 52. This prevents the supply roll 52 from shifting in the axial direction. The surfaces of the pair of gears 58 facing each other, the surfaces on the supply roll 52 side facing each other at a distance equal to the width of the wiping sheet 50 constitute a positioning surface for positioning the wiping sheet 50; In the present embodiment, each pair of gears 58 also serves as a seat position defining flange.

  The take-up roll 54 is configured in the same manner as the supply roll 52, has a hollow cylindrical shape with a circular cross section, and is made of paper, and a gear 90 as a supported rotating body is provided at each end thereof as a collet. A collet chuck 96 including a member 92 and a collet driving member 94 (see FIG. 4) is attached so that it cannot be relatively moved in the axial direction and cannot be relatively rotated, and is detachable. A wiping sheet winding body 98 is configured including the winding roll 54, a pair of gears 90, and a collet chuck 96. Similarly to the supply roll 52, the winding roll 54 has the same length as the width of the wiping sheet 50, and three types of winding rolls 54 having different lengths in three stages are prepared. Since the supply roll 52 and the take-up roll 54 are made of paper, they can be discarded after use. At this time, the gears 58 and 98 are removed from the supply roll 52 and the take-up roll 54, if available, and attached to another supply roll 52, a take-up roll 54, a new supply roll 52, or a take-up roll. can do. The supply roll and the take-up roll may be made of metal and used repeatedly.

  The screen cleaning device 20 is moved in a horizontal direction parallel to the screen 30 supported by the screen support device 16 by a screen parallel direction moving device 100 (see FIG. 1), and the screen cleaning device ascending / descending device is moved up and down. The device 102 (see FIG. 3) is moved up and down in a direction perpendicular to the screen 30. As shown in FIG. 1, the screen parallel direction moving device 100 includes a moving member 104 and a moving member moving device 106 (see FIG. 1). Although not shown, the moving member moving device 106 includes a servo motor that is an electric rotary motor as a drive source, and a feed screw device including a ball screw and a nut. As shown in FIG. 1, the moving member 104 is formed on the frame 10 between the circuit board 24 supported by the substrate support device 12 positioned at the lower end position and the screen 30 supported by the screen support device 16. The squeegee device 18 is moved in the same direction as the moving direction of the squeegee 38.

  The screen cleaning device 20 is provided on the moving member 104 so as to be movable up and down, and the space below the screen 30 is moved along the screen 30 in a direction perpendicular to the width direction of the screen 30. As shown in FIG. 3, the device main body 110 of the screen cleaning device 20 includes a pair of side wall portions 112 and a connecting portion 114 that connects the side wall portions 112, and the cross-sectional shape in the longitudinal direction forms a U-shape. It is lifted and lowered by a screen cleaning device lifting device 102 provided on the moving member 104. In this embodiment, the screen cleaning device lifting device 102 includes a pair of air cylinders 122 as shown in FIG. 3, and each of the device main bodies 110 includes a pair of guide rods 124 and guide blocks 126 as guide members. Ascend and descend while guiding.

  The apparatus main body 110 is provided on the moving member 104 in such a posture that the longitudinal direction of the connecting portion 114 is parallel to the width direction of the screen 30. As shown in FIGS. The member 130 is provided in parallel with the longitudinal direction of the connecting portion 114. The suction member 130 is formed with an opening 132 (see FIG. 2) that opens in the upper surface and extends in the longitudinal direction, and a negative pressure is supplied to the inside. In FIG. 4, reference numeral 134 denotes a sheet guide.

  The wiping sheet supply body 82 and the wiping sheet winding body 98 are attached to and detached from the apparatus main body 110, and the supply roll 52 and the winding roll 54 are attached to and detached from the apparatus main body 110. As shown in FIG. 2, the pair of support rolls 140 and 142 are supported so as to be rotatable around a horizontal axis parallel to the longitudinal direction of the suction member 130. These support rolls 140 and 142 are respectively disposed on both sides in a horizontal direction perpendicular to the longitudinal direction of the suction member 130, the support roll 140 supports the supply roll 52, and the support roll 142 supports the winding roll 54. To support.

  As shown in FIGS. 2 and 5, the support roll 140 includes a plurality of pinions 150 at one end in the axial direction, and in this embodiment, three support rotation bodies, and a plurality of pinions 150 at the other end. In the embodiment, three support rollers 152 as support rotating bodies are provided. As shown in FIG. 5, the support roll 140 is formed by integrally assembling a plurality of members for the convenience of manufacturing, and the three pinions 150 are not rotatable relative to the shaft member constituting the shaft portion of the support roll 140. In addition, the support roll 140 is configured so as not to be relatively movable in the axial direction. Each of the three pinions 150 has a slightly larger width than the gear 58 of the supply roll 52, and a spacer 154 is sandwiched between them, and a spacer 156 is disposed outside the pinion 150 at both ends, and the shaft It is assembled to the member. The spacers 154 and 156 have a diameter larger than that of the pinion 150, and a plurality of annular grooves 158 are formed on the outer peripheral surface of one end portion of the support roll 140 in the axial direction. The pinion 150 is provided in the annular groove 158, and it can be considered that the pinion 150 is provided by forming teeth on the bottom surface of the annular groove 158 which is the outer peripheral surface of the support rotating body. The spacers 154 and 156 can be considered to be annular groove forming members. Further, it is considered that the portions on both sides of each pinion 150 of the pinion 150 and the two spacers 154 and 156 that form the groove wall of the annular groove 158 constitute a support rotating body. In this way, the support rotating body has an annular groove formed on the outer peripheral surface.

  Similarly to the pinion 150, the three support rollers 152 are assembled by sandwiching two spacers 162, 164 between the shaft members constituting the support roll 140, and are not relatively rotatable with respect to the shaft members. The support roll 140 is configured to be relatively unmovable. The width of the support roller 152 is slightly larger than the tooth width of the gear 58, the diameters of the spacers 162 and 164 are larger than the diameter of the support roller 152, and three rings are formed on the outer peripheral surface of the other end in the axial direction of the support roll 140. A groove 166 is formed. It can also be considered that the bottom surface portion of the annular groove 166 constitutes the support roller 152. In addition, it is considered that the portion forming the groove wall of the annular groove 166 of each of the support roller 152 and the two spacers 162 and 164 constitutes a support rotator, and the support rotator at the other end of the support roll 140. Is an annular groove formed on the outer peripheral surface. The three pinions 150 and the support rollers 152 are positioned symmetrically with respect to the axial center, which is one point in the axial direction of the support roll 140, and each of the three annular grooves 158 and 166. Are three pairs of positions symmetrical with respect to the center, and are formed at positions having a pitch equal to the pitch between the pair of gears 58 of each of the three types of supply rolls 52.

  As shown in FIG. 2, the support roll 142 is configured in the same manner as the support roll 140, and includes three pinions 170 and two support rollers 172 on each end in the axial direction. 176 and spacers 178 and 180, and are sandwiched so that they cannot move relative to each other in the axial direction and cannot rotate relative to each other. Three annular grooves 182 and 184 are provided in the axial direction, which is one point in the axial direction. They are formed at three symmetrical positions.

  The support roll 142 is rotated by the rotation driving device 190. The rotational drive device 190 is provided on the lower surface of the connecting portion 114 of the apparatus main body 110 and is moved up and down together with the apparatus main body 110 using an electric rotary motor 192 (see FIG. 3) as a drive source. The rotation of the electric rotary motor 192 is transmitted to the support roll 142 by a rotation transmission device 200 including a pulley 194 provided on the output shaft thereof, a pulley 196 provided on the support roll 142 (see FIG. 2), and a belt 198. The roll 142 is rotated and the pinion 170 and the support roller 172 are rotated.

  The apparatus main body 110 also includes a supply roll positioning device 208 for positioning the pair of gears 58 of the supply roll 52 so as to be supported by one of each of the three pinions 150 and the support rollers 152. And a pair of gears 90 of the take-up roll 54 are respectively held by a take-up roll positioning device 210 that positions the pair of gears 90 supported by one of the three pinions 170 and one of the support rollers 172. Has been. These positioning devices 208 and 210 are configured similarly, and the supply roll positioning device 208 will be described as a representative.

  As shown in FIG. 2, the supply roll positioning device 208 includes two pairs of positioning rollers 212, and each of the three pinions 150 and the three support rollers 152 is disposed in pairs. ing. The two pairs of positioning rollers 212 are configured in the same manner, and the pair of positioning rollers 212 provided for the three pinions 150 will be described as a representative.

  As shown in FIG. 2, each of the pair of positioning rollers 212 has the same length as the portion including the three pinions 150 of the support roll 140, and one of the two positioning rollers 212 is As shown in FIG. 4, in the state where the pinion 150 of the side wall portion 112 of the apparatus main body 110 is closer to the connecting portion 114 than the pinion 150, and the pinion 150 is engaged with the gear 58 of the supply roll 52, the rotation axis of the gear 58 is It is a flat surface including a shaft 214 protruding from a portion located on the opposite side of the pinion 150 with respect to the horizontal plane, and is rotatable about an axis parallel to the rotation axis of the support roll 140 and is not movable in the axial direction. Therefore, it is attached to the apparatus main body 110 so as not to move. The one positioning roller 212 is a fixed positioning roller fixedly attached to the apparatus main body 110, and is hereinafter referred to as a fixed positioning roller 212a. The shaft 214 constitutes a fixed mounting device.

  The other of the pair of positioning rollers 212 is a movable positioning roller 212b, and is attached to the side wall 112 of the apparatus main body 110 by a movable attachment device 220 so as to be movable. 2 and 4, the movable attachment device 220 is a type of movable member that is attached to the side wall portion 112 by a shaft 222 so as to be rotatable about an axis parallel to the rotation axis of the support roll 140. A lever 224 is provided as a moving member. The lever 224 has an L-shape, and one arm portion 226 is a plane that is above the shaft 222 and includes the rotation axis of the gear 58 of the supply roll 52 engaged with the pinion 150, and is in a horizontal plane. The movable positioning roller 212b is attached to the extended end portion of the extended end portion by a shaft 228 so as to be rotatable about an axis parallel to the rotation axis of the support roll 140. , The gear 58 supported by the pinion 150 is moved substantially in the radial direction. The shaft 222 is provided on the opposite side of the shaft 214 to the pinion 150 of the side wall 112, and the movable positioning roller 212b is positioned on the opposite side of the pinion 150 from the fixed positioning roller 212a. It is done. A tension coil spring 232 as an elastic member, which is a kind of urging means, is disposed between the other arm portion 230 of the lever 224 and the side wall portion 112. The lever 224 has a movable positioning roller 212b and a pinion 150. Is biased in the direction toward the gear 58 engaged with the gear. The rotation limit of the lever 224 or the movement limit of the movable positioning roller 212b due to the bias of the spring 232 is defined by a pin-shaped stopper 234 (see FIGS. 2 and 4) which is a rotation limit defining member or a movement limit defining member. When the supply roll 52 is not attached to the screen cleaning device 20, the movable positioning roller 212b is positioned slightly inside (on the fixed positioning roller 212a side) from the position where it contacts the outer peripheral surface of the gear 58 meshed with the pinion 150. Be made. As shown in FIG. 2, the shaft 228 is long and is shared with the movable positioning roller 212b of the pair of positioning rollers 212 provided for the three support rollers 152 of the support roll 140. The two movable positioning rollers 212b is moved simultaneously.

  The positioning roller 212 that is long in the axial direction and can correspond to the three pinions 150 and the three supporting rollers 152 are the positioning roller 212 that is common to the three pinions 150 and the three supporting rollers 152. The three positioning rollers provided for each of the three pinions 150 are integrally provided, and the three positioning rollers provided for each of the three support rollers 152 are provided. It can be considered that the positioning rollers are integrally provided. In the former case, one positioning device is provided for the three pairs of pinions 150 and the support rollers 152, and the pair of gears 58 of the positioning devices are positioned so as to be supported by the pair of pinions 150 and the support rollers 152. It can be considered that the portion to be configured constitutes the positioning device described in the item (2) of the aspect of the invention. In the latter case, a positioning device is provided for each of the three pairs of pinions 150 and the support rollers 152. Therefore, it can be considered that these three positioning devices share components such as a lever and a spring. In the screen cleaning device 20, the wiping sheet 50 is supplied by a wiping sheet supply device 236 including three pairs of pinions 150, a support roller 152, and a supply roll positioning device 208. Further, the wiping sheet 50 is wound up by a wiping sheet winding device 238 including three pairs of pinions 170 and support rollers 172, a winding roll positioning device 210, and a rotation driving device 190.

  As shown in FIG. 2, the apparatus main body 110 is also provided with a braking device 240. The braking device 240 is provided for the support roll 140 that supports the supply roll 52, and is provided on the outer surface of the side wall 112 so as to face the end of the support roll 140. The braking device 240 includes a casing 242 that is a holding member fixed to the side wall portion 112, a friction member 244 that is fitted in the casing 242 so as to be concentrically movable with respect to the support roll 140 in the axial direction and is relatively non-rotatable, and a friction member 244. And a compression coil spring 246 as an elastic member which is a kind of biasing means for biasing the spring toward the support roll 140. The friction member 244 has a circular cross-sectional shape and is made of a material having a high coefficient of friction, such as rubber or the like, or a synthetic resin. These rubbers and the like are desirably provided with a friction coefficient adjusting material. The friction member 244 is pressed against the end surface of the support roll 140 by the bias of the spring 246.

  The screen printing machine is controlled by a control device 260 (see FIG. 1) mainly composed of a computer. The control device 260 controls various devices constituting the screen printing machine and controls the notification device 262. Further, a sheet winding length detection device 264 for detecting the winding length of the wiping sheet 50 by the winding roll 54 is connected. The sheet winding length detection device 264 is configured by the same principle as the detection device described in, for example, Japanese Patent Laid-Open No. 10-029747, and is relatively rotatable on the outer peripheral surface of the wiping sheet 50 wound around the supply roll 52. The detection roller as a detection member made to contact is provided. The detection roller follows the decrease in the sheet winding diameter due to winding of the wiping sheet 50 (drawing of the wiping sheet 50 from the supply roll 52), and rotates around the supply roll 52 to detect the rotation amount of the detection roller. On the basis of this, the winding length or supply length of the wiping sheet 50 is detected.

The attachment and detachment of the supply roll 52 or the wiping sheet supply body 82, the winding roll 54 or the wiping sheet winding body 98 with respect to the screen cleaning device 20 will be described.
When the supply roll 52 is attached, the operator holds the wiping sheet supply body 82 and, as shown by a two-dot chain line in FIG. 2, a pair of gears 58 attached to both ends of the supply roll 52 and the support roll 140. A wiping sheet in a state where one pair of the three pairs of annular grooves 158 and 166 is aligned with the pair of annular grooves 158 and 166 whose pitch is equal to the pitch of the pair of gears 58. The supply body 82 is lowered onto the support roll 140. From the three pairs of annular grooves 158 and 166, one pair that forms a pair with a distance corresponding to the distance between the pair of gears 58 is selected, aligned, and fitted. At this time, the pair of gears 58 are in contact with the fixed positioning roller 212a and the movable positioning roller 212b respectively provided for the pinion 150 and the support roller 152, and the gear 58 having a circular cross-sectional shape functions as a wedge. As shown by a two-dot chain line in FIG. 4, the lever 224 is rotated against the urging force of the spring 232, the movable positioning roller 212b is moved backward to be separated from the gear 58, and between the fixed positioning roller 212a. The pinion 150 and the support roller 152 are brought close to each other while creating a gap that can enter the ring groove 158 and fitted into the annular grooves 158 and 166. In a state where the supply roll 52 is removed, the movable positioning roller 212b is positioned slightly on the fixed positioning roller 212a side from the position where it contacts the gear 58, and the gear 58 is interposed between these rollers 212a and 212b by its wedge function. A gap is secured so that the movable positioning roller 212b can be moved backward against the biasing force of the spring 232, and the movable positioning roller 212b is moved backward while the gear 58 approaches the pinion 150 and the support roller 152. , Can be supported by the support roller 152. Then, one gear 58 is meshed with the pinion 150 and the other gear 58 is placed on the support roller 152. As a result, the pinion 150 and the support roller 152 are in contact with and supported by the pair of gears 58 on their outer peripheral surfaces (in the pinion 150, the tooth surfaces of the teeth also form part of the outer peripheral surface). Each of the gears 58 is sandwiched between the pair of groove side surfaces of the annular grooves 158 and 166 and positioned in the axial direction of the support roll 140 to prevent the axial movement.

  In this state where the pair of gears 58 are supported by the pinion 150 and the support roller 152, the movable positioning roller 212 b is moved by the urging force of the spring 232 as shown in FIG. The gear 58 is kept in contact with the outer peripheral surface so as to be relatively rotatable, and the pinion 150, the fixed positioning roller 212a, and the movable positioning roller 212b are contacted at three points separated in the circumferential direction of the gear 58 by the biasing force of the spring 232. Then, they are sandwiched between them and positioned in a direction perpendicular to the rotation axis, and are maintained in a state of being supported by the pinion 150 and the support roller 152. As described above, the fixed positioning roller 212a and the movable positioning roller 212b are provided on the opposite side of the pinion 150 with respect to the horizontal plane including the rotation axis thereof, and the outer peripheral surface of the gear 58 meshed with the pinion 150. Further, it is provided so as to be in contact with the horizontal plane on the opposite side to the pinion 150, and is located on the opposite side with respect to the pinion 150, and in contact with the outer peripheral surface of the gear 58 at the opposite side position. Of the pinion 150, the fixed positioning roller 212a, and the movable positioning roller 212b, the sum of any two angular intervals between two adjacent ones in the circumferential direction of the gear 58 is greater than 180 degrees. Therefore, the gear 58 is prevented from lifting from the pinion 150 unless a force exceeding the urging force of the spring 232 is applied. As a result, the gear 58 and the pinion 150 are kept engaged with each other, and the rotation of the pinion 150 is reliably transmitted to the gear 58. The same applies to the other gear 58, which is supported by the support roller 152, positioned by the positioning rollers 212a and 212b, and prevented from being lifted. In this embodiment, the supply roll positioning device 208 also functions as a lift prevention device. In this supported and positioned state, straight lines passing through the rotation axes of the pair of gears 58 and the rotation axes of the pinion 150 and the support roller 152 are parallel to each other in the vertical direction. Each is supported from below by a pinion 150 and a support roller 152.

  The winding roll 54 is attached to the apparatus main body 110 in the same manner as the supply roll 52, and one of the pair of gears 90 is one of the three annular grooves 182 as shown by a two-dot chain line in FIG. Is engaged with and supported by the pinion 170, the other is fitted into one of the three annular grooves 184, and is placed on and supported by the support roller 172. In addition, a pair of gears 90 is sandwiched between the pair of groove side surfaces of the annular grooves 182 and 184 and positioned in the axial direction, and positioned by the take-up roll positioning device 210 to prevent lifting. . As shown in FIG. 4, the wiping sheet 50 is pulled out from the supply roll 52 and covered on the pair of sheet guides 134 and the suction member 130, and then the end is fixed to the winding roll 54. To be done. The width direction of the wiping sheet 50 is parallel to the width direction of the screen 30.

  When cleaning the screen 30, the screen cleaning device 20 is moved from the retreat area to the cleaning start position. The retreat area is a position away from the screen 30 and the substrate support device 12 in the moving direction of the screen cleaning device 20 by the screen parallel direction moving device 100. After the movement, the screen cleaning device 20 is raised by the screen cleaning device lifting device 102, and the portion of the wiping sheet 50 covered by the suction member 130 is brought into contact with the substrate contact surface of the screen 30. In this state, the screen cleaning device 20 is moved along the screen 30 by the screen translation device 100, and the wiping sheet 50 wipes off the dirt adhering to the screen 30. Further, negative pressure is supplied to the suction member 130, and dirt such as cream solder adhering to the inner peripheral surface of the through hole of the screen 30 is sucked away from the screen 30 and wiped by the wiping sheet 50. The suction member 130 also functions as a support member that supports the wiping sheet 50 during wiping. When the screen cleaning device 20 reaches the cleaning end position and the wiping is completed, the screen cleaning device 20 is lowered, the wiping sheet 50 is separated from the screen 30, and the screen cleaning device 20 is returned to the cleaning start position.

  During the return of the screen cleaning device 20 to the cleaning start position, the take-up roll 54 is rotated to take up the wiping sheet 50, and the dirty portion used for wiping the wiping sheet 50 is a suction member. A new unclean portion of the wiping sheet 50 is retracted from the top 130 and positioned on the suction member 130 and pulled out from the supply roll 52. At the time of winding, the support roll 142 is rotated by the rotation driving device 190 and the pinion 170 is rotated, whereby rotational torque is transmitted to the gear 90 meshed with the pinion 170, and the winding roll 54 is rotated. In this embodiment, the pinion 170 of the support roll 142 constitutes a driving rotator, and the gear 90 meshed with the pinion 170 constitutes a driven rotator. The support roller 172 is also rotated by the rotation of the support roll 142, supports the gear 90, and supports the winding roll 54 while allowing the rotation. The electric rotary motor 192 is controlled based on the detection of the winding length of the wiping sheet 50, and the wiping sheet 50 is wound by a predetermined length.

  Also, braking torque acts on the supply roll 52. When the take-up roll 54 is rotated and the wiping sheet 50 is moved in the longitudinal direction, the supply roll 52 rotates to allow the wiping sheet 50 to be pulled out or taken up. Since the friction member 244 is pressed, a braking torque opposite to the direction in which the wiping sheet 50 of the supply roll 52 is pulled out acts on the support roll 140 due to the friction between them, and the pinion 150 and the gear 58 is transmitted to the gear 58 by meshing with the power 58, and a force opposite to the direction in which the wiping sheet 50 is pulled out acts on the supply roll 52. Therefore, the wiping sheet 50 is given a tension opposite to the tension acting by the rotation of the winding roll 54, and the wiping sheet 50 is drawn out without slack and wound by the winding roll 54 by a predetermined length. . Further, when the take-up roll 54 is stopped, the supply roll 52 continues to rotate due to inertia, and the wiping sheet 50 is prevented from sagging, and is kept in a stretched state, and the screen 30 is wiped well. To be done. In this embodiment, the pinion 150 of the support roll 140 constitutes a braking torque transmitting body, and the gear 58 meshed with the pinion 150 constitutes a braking torque transmitted body. The support roller 152 also rotates while supporting the supply roll 52.

  The screen cleaning device 20 wipes the screen 30 again after being returned to the cleaning start position. Therefore, the screen cleaning device 20 is raised and the unused clean surface of the wiping sheet 50 is brought into contact with the screen 30. In this state, the screen cleaning device 20 is moved along the screen 30, and the wiping sheet is moved. 50 wipes and finishes the screen 30. When the screen cleaning device 20 reaches the cleaning end position, the screen cleaning device 20 is lowered to separate the wiping sheet 50 from the screen 30, is retracted to the retreat area, and waits for the next cleaning.

  If there is no wiping sheet 50 supplied in the supply roll 52, the supply roll 52 will not rotate even if the winding roll 54 is rotationally driven. Therefore, it is detected that the wiping sheet 50 has disappeared due to the detection roller of the sheet winding length detection device 264 not rotating for a set time, and the operator is notified by the notification device 262. Thereby, the operator removes the supply roll 52 and the take-up roll 54 from the screen cleaning device 20 and attaches the supply roll 52 around which the unused wiping sheet 50 is wound and the empty take-up roll 54.

  At this time, the operator makes contact with the supply roll 52 with the positioning rollers 212 a and 212 b and keeps the wiper sheet supply body 82 in a state of being positioned by the supply roll positioning device 208, exceeding the urging force of the spring 232. The pair of gears 58 is lifted straight upward while being separated from the pinion 150 and the support roller 152 and removed from the screen cleaning device 20. The pair of gears 58 is retracted from between the fixed positioning roller 212a and the movable positioning roller 212b while retracting the movable positioning roller 212b against the urging force of the spring 232 by the wedge action, and is supplied to the supply roll 52 or the wiper. The take-up sheet supply body 82 is easily removed from the screen cleaning device 20. Similarly, the take-up roll 54 is removed, and the supply roll 52 around which the new wiping sheet 50 is wound and the empty take-up roll 54 are attached to the screen cleaning device 20.

  The supply roll 52 and the take-up roll 54 are also replaced when the type of the circuit board 24 on which the cream solder is printed is changed, the width of the printing use area of the screen 30 is changed, and the width of the cleaning area is changed. This screen cleaning device 20 includes annular grooves 158, 166, 182, 184, three pinions 150, 170, and support rollers 152, 172 each having three support rolls 140, 142, and three types having different widths. The wiping sheet 50 can be selectively set, and the operator removes the supply roll 52 and the take-up roll 54 that are actually attached to the screen cleaning device 20, and the width of the area requiring cleaning is reduced. A supply roll 52 around which a wiping sheet 50 having a width corresponding to the wiping sheet 50 is wound and a winding roll 54 that winds up the wiping sheet 50 are attached to the screen cleaning device 20. At the time of attachment, the gears 58 at both ends of the supply roll 52 are each a pair of the three annular grooves 158 and 166 of the support roll 140 according to the width of the wiping sheet 50 and have a pitch of one pair. A pair of annular grooves 158 and 166 equal to the pitch between the gears 58 are selected and fitted. The same applies to the winding roll 54, and when the wiping sheet 50 is replaced with one having a different width, the gears 58 and 90 are annular grooves 158, 166, 182 and 184 corresponding to the width of the wiping sheet 50. Can be easily and quickly replaced by simply engaging with the pinion 150, 170 and engaging with the pinion 150, 170. The positioning rollers 212a and 212b of the positioning devices 208 and 210 are long and are supported by the pinions 150 and 170 and the support rollers 152 and 172 even if the pitch between the pair of gears 58 and 90 is any of the three stages. The gears 58 and 90 can be contacted and positioned.

  As described above, in the present screen cleaning apparatus 20, the supply roll 52 and the take-up roll 54 are simply attached to and detached from the screen cleaning apparatus 20 simply by moving the supply roll 52 and the take-up roll 54 in the vertical direction. be able to. Although the movable positioning roller 212b of the positioning devices 208 and 210 is biased by the spring 232, the gear 58 itself functions as a wedge to retract the movable positioning roller 212b against the biasing force of the spring 232. However, the movable positioning roller 212b does not need to be allowed to retreat by allowing the supply roll 52 and the take-up roll 54 to be attached and detached. By separating them, the supply roll 52 and the take-up roll 54 are positioned by the positioning devices 208 and 210, and can be easily attached to and detached from the screen cleaning device 20 while releasing the positioning. Further, the gears 58 and 90 and the pinions 150 and 170 are engaged with each other. However, the gears 58 and 90 may be engaged with each other while being placed on the pinions 150 and 170, which is simple. In particular, the gears 58 and 90 are provided at both ends of the supply roll 52 and the take-up roll 54, and the supported rotating bodies at both ends of the rolls 52 and 54 can be made common, whereas the pinion 150 , 170 are provided only at one end of each of the support rolls 140, 142, and therefore, pinion is provided at both ends of one support roll, and the meshing operation is compared with the case where the gears are meshed with the two pinions. The supply roll 52 and the take-up roll 54 can be quickly attached. In addition, since gears 90 are provided at both ends of the take-up roll 54, when the take-up roll 54 is attached to the screen cleaning device 20, any one of both ends of the take-up roll 54 is connected to the pinion 170 and the support roller. It may be supported by 172 and is easy to mount. Since the gears 58 are also provided at both ends of the supply roll 52, winding is easy regardless of the winding direction when the wiping sheet is wound around the supply roll 52.

Another embodiment of the claimable invention will be described with reference to FIG.
In the screen cleaning device 268 of this embodiment, the positioning device 270 includes a guide groove 274 formed in the device main body 272. The guide grooves 274 are respectively formed in a pair of side wall portions 276 (only one side wall portion 276 is shown in FIG. 6) constituting the apparatus main body 272, and the side wall portions 276 are parallel to the rotation axis of the support roll 277. It is formed so as to penetrate in the direction and open vertically and upward. The opening of the guide groove 274 is inclined such that the distance between the pair of groove side surfaces 278 is increased upward, and the guide portion 280 is formed. The side wall portion 276 is also provided with a lifting prevention device 282. The lift prevention device 282 is configured by a ball plunger in this embodiment, and urges the casing 284, the ball 286 movably accommodated in the casing 284, and the ball 286 to protrude from the casing 284. Including a spring (not shown) and assembled in the side wall 276. The ball 286 is prevented from coming out of the casing 284, but a part of the ball 286 is projected from the one groove side surface 278 into the guide groove 274.

  The supply roll and the winding roll set in the screen cleaning device 268 are provided with shaft portions 292 at both ends as shown in FIG. Only the shaft 292 is shown). The shaft portion 292 is provided on the chuck driving member 296 of the collet chuck 294, for example. Other configurations are the same as those of the screen cleaning apparatus 20 of the above-described embodiment, and the description thereof is omitted.

  When the take-up roll 290 is attached to the screen cleaning device 268, the shaft portions 292 at both ends are fitted into the guide grooves 274, respectively. The shaft portion 292 is guided by the guide portion 280 to enter the guide groove 274 and is fitted while the ball 286 is retracted into the casing 284 against the urging force of the spring. The winding roll 290 is straightly lowered by the shaft portion 292 being guided by the guide groove 274, one gear 300 is meshed with the pinion 304 of the support roll 277, and the other gear (not shown) of the support roll 277. It is placed on a support roller (not shown). In this state, the ball 286 is engaged with the shaft portion 292 by the bias of the spring, and the gear 300 is pressed against the pinion 304 and the support roller by the action of the slope to prevent the gear 300 from engaging with the pinion 304. , And kept in a state supported by the support roller. The pair of gears 300 are positioned so as to be supported by the pinion 304 and the support roller by the engagement between the shaft portion 292 and the pair of groove side surfaces 278 of the guide groove 274. When the take-up roll 290 is removed from the apparatus main body 272, the take-up roll 290 is moved upward while applying a force exceeding the urging force of the spring of the lift prevention apparatus 282, and the shaft portion 292 is moved to the spring of the ball 286. The guide groove 274 is pulled out while being retracted into the casing against the urging force.

Still another embodiment of the claimable invention will be described with reference to FIG.
In the screen cleaning device 318 of the present embodiment, the drive rotator includes a support portion and a gear portion. Therefore, as shown in part of FIG. 7, each of the plurality of drive rotators 322 at one end of the support roll 320 includes a support roller 324 as a support portion and a pinion 326 as a gear portion provided adjacent to each other. including. The diameter of the support roller 324 is smaller than the diameter of the pinion 326, and an annular groove 330 is formed between the spacer 328 and the pinion 326 that separates the two adjacent drive rotators 322, and the bottom surface of the annular groove 330 is supported. It can also be considered that the roller 324 is configured. The other end of the support roll 320 is provided with the same number of support rollers as the drive rotator 322, although not shown. At the other end of the support roll 320, the same number of annular grooves as the plurality of annular grooves 330 are formed at symmetrical positions with respect to the center of the support roll 320 in the axial direction. A support roller is provided. It is also considered that the bottom surface of the annular groove constitutes a support roller.

  At one end of the take-up roll 334 supported by the support roll 320, a supported roller 336 as a supported part and a gear 338 as a gear part are provided to constitute a supported rotating body or a driven rotating body. Yes. The supported roller 336 has a larger diameter than the gear 338. Although not shown in the drawing, the other end of the winding roll 334 is provided only with a supported roller to constitute a supported rotating body. A supported roller and a gear may be provided at the other end of the winding roll 334.

  When the take-up roll 334 is supported by the support roll 320, the supported roller 336 is fitted in the annular groove 330 at one end and placed on the support roller 324, and the gear 338 is engaged with the pinion 326. At the other end, the supported roller is fitted into the annular groove and placed on the supporting roller. The winding roll 334 is supported by contact between the support roller (324) and the supported roller (336) at both ends thereof, and the gear 338 and the pinion 326 are only configured to transmit rotational torque by their meshing. Also in this embodiment, it is considered that the portions of the support roller 324, the pinion 326, and the spacer that form the groove wall of the annular groove 330 constitute the support rotating body.

Still another embodiment of the claimable invention will be described with reference to FIG.
In the screen cleaning device 348 of the present embodiment, two support rotating bodies jointly support one supported rotating body. Therefore, the device main body of the screen cleaning device 348 is provided with, for example, a pinion 354 and a support roller 356 for the gear 352 at one end of the take-up roll 350, and these support the gear 352 together. . The pinion 354 and the support roller 356 include a rotation axis of the gear 352 in a state where they support the gear 352, and are at a position opposite to the vertical plane and centered on the rotation axis of the gear 352. On the circumference, for example, they are rotatably provided at positions separated by an angle of 120 degrees. As for the gear at the other end of the winding roll 350, two support rollers as support rotating bodies are provided in the apparatus main body. These support rollers are provided concentrically with the pinion 354 and the support roller 356, respectively. Note that the pinion 354 and the support roller 356 may be provided such that each rotation axis is located on a different circumference around the rotation axis of the gear 352.

  The take-up roll 350 is supported with a gear 352 at one end meshed with the pinion 354 and supported by being placed on a support roller 356, and a gear at the other end is placed on and supported by two support rollers. The The pinion 354, the support roller 356, and the two support rollers are positioned with the gear 352 interposed therebetween to prevent horizontal movement, and also function as a positioning device that positions the take-up roll 352.

  One of the pair of supported rotating bodies of the supply roll and the winding roll may be a supported roller instead of the gear.

  Moreover, when there are two supporting rotators of the screen cleaning device, both of these two supporting rotators may be gears.

  Further, when the screen cleaning device cleans the screen, the screen is wiped off the screen with a wiping sheet both during the forward path from the cleaning start position to the cleaning end position and during the return path from the cleaning end position to the cleaning start position. You may do it. At this time, for example, after the screen cleaning device reaches the cleaning end position, the wiping sheet is wound on the winding roll for a predetermined length while being kept in contact with the screen, and an unused clean surface is applied to the screen. Wiping on the return path is performed in the contacted state. In this case, when the screen cleaning device is moved in a direction opposite to the direction in which the wiping sheet is pulled out from the supply roll with respect to the screen, the braking torque transmitted from the support rotating body to the supported rotating body is increased. It is desirable that the supply roll is not rotated by the force acting between the screen and the wiping sheet so that the wiping sheet is not pulled out of the supply roll.

  The screen cleaning device according to the claimable invention may be provided outside the screen printer and used for cleaning the screen removed from the screen support device. Whether the screen cleaning device is provided on the screen printing machine or outside the screen printing machine, the screen is the surface opposite to the substrate contact surface and the surface on which the squeegee is brought into contact. It is good also as an apparatus which cleans from the upper surface side. In this case, the separation preventing device that prevents the supported rotating body from separating from the supporting rotating body functions as a fall preventing device.

It is a front view which shows roughly the screen printing machine provided with the screen cleaning apparatus which is one Example of claimable invention. It is a top view (partial cross section) which shows the said screen cleaning apparatus. It is a front view which shows the screen cleaning apparatus raising / lowering apparatus which raises / lowers the said screen cleaning apparatus. It is a side view which shows the said screen cleaning apparatus. It is front sectional drawing which shows the part by the side of the side provided with the pinion of the support roll which supports the winding roll of the said screen cleaning apparatus with a winding roll. It is a side view which shows roughly the positioning device of the screen cleaning apparatus which is another Example of claimable invention. It is a front view which shows roughly the drive rotary body of the screen cleaning apparatus which is another Example of claimable invention. It is a side view which shows roughly the positioning device of the screen cleaning apparatus which is another Example of claimable invention.

Explanation of symbols

  20: Screen cleaning device 30: Screen 50: Wiping sheet 52: Supply roll 54: Winding roll 58, 90: Gear 110: Main body 140, 142: Support roll 150: Pinion 152: Support roller 158, 166: Ring Groove 170: Pinion 172: Support rollers 182 and 184: Ring groove 190: Rotation drive device 208: Positioning device for supply roll 210: Positioning device for take-up roll 212: Positioning roller 214: Shaft 220: Movable mounting device 232: Tension Coil spring 240: Braking device 268: Screen cleaning device 270: Positioning device 272: Device main body 274: Guide groove 277: Support roll 282: Lift prevention device 300: Gear 304: Pinion 3 8: Screen cleaning device 320: Support device 322: Drive rotating body 324: Support roller 326: Pinion 330: Ring groove 334: Winding roll 336: Supported roller 338: Gear 348: Screen cleaning device 350: Winding roll 352 : Gear 354: Pinion 356: Support roller

Claims (6)

A screen cleaning device that cleans a screen printing machine by wiping the screen with a wiping sheet.
The device body;
In the apparatus main body, a pair of supported rotating bodies provided in two portions separated in the axial direction of a winding roll that is rotatably held around the rotation axis and winds up the wiping sheet, At least two support rotators in contact and support;
Each of the supported rotating bodies held by the apparatus main body is positioned in a state of being supported by the corresponding supporting rotating bodies, and in the positioning state, the winding roll is orthogonal to the winding roll axis. A positioning device that allows the winding roll to be detached from the device body when a unidirectional force is applied;
A wiping sheet supply device that is held by the apparatus body and supplies the wiping sheet;
A pair of supported rotating bodies provided in two portions of the at least two supporting rotating bodies separated in the axial direction of the take-up roll. The screen cleaning device is characterized in that at least one of them is a drive rotator that transmits rotational torque to at least one of the drive rotators, and the drive rotator is rotated by the rotation drive device. The supporting rotating body is two, and the positioning device is
A total of two pairs of positioning rollers in contact with each outer peripheral surface of each of the supported rotating bodies;
A fixed mounting device in which one of each pair of positioning rollers is fixedly mounted to the device main body to be a fixed positioning roller;
A movable attachment device that attaches the other of the pair of positioning rollers to the device main body so as to be movable in a substantially radial direction of the supported rotating body to be a movable positioning roller;
An urging device that urges the movable positioning roller toward the supported rotating body, and among the supporting rotating body, the fixed positioning roller, and the movable positioning roller, each other in a circumferential direction of the supported rotating body The screen cleaning apparatus according to claim 1, wherein any two sums of the angular intervals between two adjacent ones are all greater than 180 degrees.   An annular groove is formed on the outer peripheral surface of the supporting rotating body, and the supported rotating body is axially positioned by fitting the supported rotating body into the annular groove. The screen cleaning apparatus according to claim 1 or 2.   The two support rotating bodies are constituted by two portions separated in the axial direction of one support roll, and the annular grooves are in a plurality of pairs of positions symmetrical to one point in the axial direction of the support roll. The screen cleaning device according to claim 3, wherein the pair of supported rotating bodies are fitted into a pair of annular grooves formed respectively and selected from the plurality of pairs.   5. The screen cleaning according to claim 1, wherein each of the driving rotating body and the supported rotating body corresponding to the driving rotating body is a gear having teeth formed on an outer peripheral surface thereof. apparatus. The wipe sheet supply device is
A pair of supported rotating bodies provided in two portions separated in the axial direction of the supply roll on which the wiping sheet is wound, at least two supporting rotating bodies that are in contact with and support each other on their outer peripheral surfaces;
Each of the supported rotating bodies held by the apparatus main body is positioned in a state of being supported by the corresponding supporting rotating body, and in this positioning state, the supply roll is orthogonal to the axis of the supply roll. A positioning device that allows the supply roll to be detached from the device body when a directional force is applied;
And the screen cleaning device includes a braking device held by the device main body, and corresponds to at least one of the pair of supported rotating bodies provided at two portions separated in the axial direction of the supply roll. 6. The screen cleaning device according to claim 1, wherein the support rotating body is a braking torque transmitting body that transmits a braking torque of the braking device to at least one of the supporting rotating bodies.

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