JPH11227156A - Cream solder cutting implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cream solder cutting implement for cutting a cream solder via a wire material. SOLUTION: A finishing gut 50 is bridged over a pair of support arms 34, and both ends of the gut 50 are fixed to a cutting implement body 28 by a fixing unit 52. The unit 52 has two pairs of holding members 54 made of belleville springs, and is fixed in the state that an elastic force is generated between a head 64 of the shaft 56 and the body 28. One end of the gut 50 is elastically held at the one pair of the two members 54, and bridged over the pair of the arms 34. And then, the other end is elastically held at the other pair of the two members 54 while giving a tension necessary to cut the cream solder to the tug 50. After the solder is supplied, the cream solder cutting implement 14 is moved to the cream solder container 12, the cut part between the arms 34 of the gut 50 is crossed to the solder discharged from a discharge tube 20, thereby cutting the solder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cream solder cutting tool, and more particularly to a cutting tool for cutting cream solder with a wire.

[0002]

2. Description of the Related Art A cream solder cutting tool is provided, for example, in a cream solder supply device of a cream solder printing machine. A cream solder printing machine is used, for example, for printing cream solder on a circuit substrate such as a printed circuit board. In this type of cream solder printing machine, cream solder placed on a screen is printed on a circuit substrate through a through hole of the screen while being moved by a squeegee.
When the cream solder needs to be supplied, the cream solder supply device supplies the cream solder onto the screen.
In addition, there is a cream solder printing machine of a type in which a sealed cream solder container is formed above a squeegee. In this case, cream solder is supplied from the cream solder supply device to the cream solder container.

[0003] The cream solder supply device includes, for example, a cream solder container in which cream solder is stored, an extruding device for extruding cream solder stored in the cream solder container, and a cream solder container and extruding device. And a moving device for moving the screen or the cream solder container. During the supply of cream solder, the cream solder container is moved onto the screen by the moving device, the cream solder is pushed out of the cream solder container by the extruder, and the screen or cream solder container is passed through the solder discharge port such as a discharge nozzle. Supplied to At this time, the cream solder may be connected between the solder discharge port and the screen or the cream solder storage section even after the extrusion by the extruder is completed, or may be dripped from the solder discharge port even if cut. It is necessary to cut with a solder cutting tool.

[0004] Therefore, the applicant of the present invention has considered a cutting tool for cutting cream solder by using a wire which is a kind of wire. The cutting tool main body is provided with a pair of gusset supports at a certain distance from each other, the gusset is stretched between the gusset supports, and both ends of the gusset are fixed to the cutting tool body by bolts. I thought of a type of cutting tool. The bolt is tightened into the cutting tool body with both ends of the screw together and wound on the screw part of the bolt, and the both ends of the screw are fixed between the head of the bolt and the cutting tool body. . As a result, tensile forces are applied in opposite directions to both ends of the box, and the portion stretched between the pair of box supports is kept straight.
If this cream solder cutting tool is moved in a direction transverse to the solder extending from the solder discharge port, the cream stretched between the pair of support portions, it is possible to cut the cream solder by the wire. it can.

[0005] However, it has been found that when the both ends of the box are fixed to the cutting tool body by bolts, the box may be cut. When the bolt is rotated between the head of the bolt and the cutting tool body to hold the both ends of the rope in place, both ends of the rope go around the head of the bolt and cut off the head of the bolt. It is drawn into the gap with the tool body. Both ends of the box are pulled toward the bolt, and the retraction must be allowed by the extension of the box. On the other hand, the distance between the pair of support members may be a length sufficient to cut the cream solder discharged from the solder discharge port, and the distance between the pair of support members and the bolt, Since it is desirable to be shortened in order to shorten the use length of the box, the overall length of the box is relatively short. Therefore, the elongation allowed to pass through the cutting is relatively small, and the drawing into the gap is not sufficiently permitted, so that the dressing may be cut.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is directed to a cutting tool for cutting cream solder using a wire, which is free from the possibility of the wire being cut. The task was to provide According to the present invention, the cream solder cutting tools of the following embodiments can be obtained. As in the case of the claims, each aspect is divided into sections, each section is numbered, and if necessary, the other sections are cited in a form in which the numbers are cited. This is to clarify the possibility of combining the features described in each section. (1) A cutting tool main body provided with a pair of wire support portions separated by a fixed distance from each other, and a fixing device for fixing both ends of the wire stretched between the pair of wire support portions to the cutting tool body. A cream solder cutting tool comprising: the fixing device,
At least one has a tapered outer peripheral surface, the other has an opposing surface facing the tapered outer peripheral surface, and at least one pair of pinching members forming a wedge-shaped gap between the tapered outer peripheral surface and the opposing surface; An urging means for urging the tapered outer peripheral surface and the opposing surface of the member toward each other (claim 1). The facing surface may be a tapered outer peripheral surface or a flat surface. Each of the pair of sandwiching members may be a member different from the cutting tool main body, or one of the pair of sandwiching members may be constituted by the cutting tool main body. The wire may be a single wire that is not twisted, such as a metal wire or a wire, or a wire that is formed by twisting a plurality of thin fibers or metal wires, such as a thread or a wire. When the ends of the wire are held by the pair of sandwiching members, the wire is wound around a portion of the pair of sandwiching members within a predetermined angle range, and tension is applied to both sides of the wound portion. Of the tapered outer peripheral surface and the opposing surface while expanding against the urging force, penetrates between the two surfaces, and is elastically sandwiched and held between the two surfaces. The wedge-shaped gap serves to guide the entry of the wire, and the wire easily spreads the gap between the pair of sandwiching members against the urging force of the urging means due to the wedge effect. Both ends of the wire may be held by a pair of sandwiching members, or both ends may be held by a common sandwiching member. Further, only one end may be held by a pair of sandwiching members.
For example, after one end of the wire is fixed to the cutting tool body by a fixing member such as a bolt, an intermediate portion is stretched between a pair of wire support portions, and then the remaining end is held by a pair of sandwiching members. So that they can be The worker pulls the wire fixed at one end to the cutting tool main body by a pinching member or a fixing member other than the pinching member, and crosses the wire between the pair of wire support portions while checking the tension of the wire. When the portion is wound around the pair of sandwiching members, the other end can be held by the sandwiching member. Alternatively, both ends of the wire having the intermediate portion stretched between the pair of wire support portions may be held by the sandwiching member while checking the tension of the wire. The wire rod can be fixed to the cutting tool body in a state where the tension necessary for cutting the cream solder is applied, while avoiding the cutting of the wire rod by applying an excessive tensile force. Because the cream solder is soft, it is possible to cut the cream solder without hindrance without significantly increasing the tension of the part that is stretched between the pair of wire support parts of the wire, and the worker can cut the end of the wire. It is enough to simply pull and pinch it between the pinching members. The portion of the wire stretched between the pair of wire support portions constitutes a cutting portion for cutting the cream solder, and the cream solder cutting tool crosses the cream solder to be cut when the cream solder is cut. Are moved relative to each other. (2) The cream solder cutting tool according to the above mode (1), wherein each of the holding members has a center hole, and the holding shaft is inserted into the center holes to support the holding member on the support shaft. According to the cream solder cutting tool of this aspect, the sandwiching member can be stably supported with a simple configuration. (3) The cream solder cutting tool according to (2), including two pairs of the sandwiching members, wherein the two pairs of sandwiching members are supported on the support shaft in series with each other. It is also possible to provide two support shafts and support each support shaft with a pair of sandwiching members. However, according to this embodiment, only one support shaft is required, and the configuration can be particularly simplified. In the cream solder cutting tool of this aspect, both ends of the wire are respectively held by the sandwiching members. When the wire is attached to the cutting tool main body, the wire may be hung on a pair of wire support portions, and both ends may be sandwiched between a pair of sandwiching members, and a tool is not required, and the wire can be easily and quickly attached. Also, when the wire is removed from the cutting tool main body, it is sufficient to apply a force in a direction of detaching from between the sandwiching members to both ends of the wire, and a tool is unnecessary, and the wire can be easily and quickly removed. (4) The support shaft has a male screw portion at one end, and a female screw member is screwed into the male screw portion. By changing the screwing position between the female screw member and the male screw portion, the holding member and the urging means are moved from both sides. The distance between the pair of receiving surfaces can be changed
The cream solder cutting tool according to (2) or (3). One of the pair of receiving surfaces is a fixed receiving surface that cannot be moved relative to the cutting tool main body, and the other is a movable receiving surface that can be approached to or separated from one of the cutting tool bodies, thereby simplifying the configuration of the fixing device. Desirable above. The movable receiving surface can be formed by, for example, a nut screwed into a male screw portion of the support shaft or a head fixedly provided at one end of the support shaft. In the former case, the support shaft may be simply fixed to the cutting tool body, and in the latter case,
The support shaft may be screwed into the cutting tool main body (the cutting tool main body is used as a female screw member), or a nut may be screwed into a male screw portion passing through the cutting tool main body. If the pair of pinching members are fitted to the outside of the support shaft and the pair of receiving surfaces prevent separation from the support shaft, the pinching member can be easily attached to the cutting tool body. Also, by changing the screwing position between the female screw member and the male screw portion to adjust the interval between the receiving surfaces, the elastic force of the urging means can be adjusted. Before holding the wire on the sandwiching member, if the screwing position between the female screw member and the male screw portion is adjusted in advance and the elastic force of the urging means is adjusted, the worker can attach the wire to the cutting tool main body. There is no need to rotate the nut or support shaft. (5) The cream solder cutting tool according to (4), wherein one of the pair of receiving surfaces is formed by a cutting tool body. According to the cream solder cutting tool of this aspect, the number of components can be reduced, and the configuration of the fixing device can be simplified. (6) The sandwiching member having the tapered outer peripheral surface is made of a disc spring, and the elasticity of the disc spring constitutes the urging means.
The cream solder cutting tool according to any one of (1) to (5) (Claim 2). The wire rod that has entered between the pair of sandwiching members is elastically held by the pair of sandwiching members by the elastic force of the disc spring. Since the coned disc spring as the sandwiching member also serves as the urging means, the number of parts is reduced and a cutting tool having a simple configuration can be obtained as compared with a case where an elastic member dedicated for urging is provided separately from the sandwiching member. . It is also possible to configure both of the pair of sandwiching members with a disc spring, and in this case, it is easier to widen the gap between the pair of sandwiching members as compared to the case where only one is a disc spring. The work of fixing the end of the wire becomes easy. (7) The cream according to any one of (1) to (6), wherein the wire support portion has a notch formed at a tip of a pair of support arms extending substantially parallel to each other to hang the wire. Solder cutting tool. The portion of the wire support that defines the notch prevents the wire from shifting and keeps the wire stably stretched between the pair of wire supports. (8) The cutting tool main body includes a parallel portion substantially parallel to the cutting direction, and an inclined portion inclined with respect to the parallel portion, and the pair of support arms are substantially parallel to the cutting direction from the parallel portion. And the support shaft is extended from the inclined portion,
The cream solder cutting tool according to item (7), which is extended perpendicular to a plane contacting the inclined portion and in a direction approaching a plane contacting the parallel portion. The cutting of the cream solder is desirably performed in a direction orthogonal to the axis of the cream solder to be cut, and the cutting direction may be a horizontal direction or a direction inclined with respect to a horizontal plane.
For example, as described in the embodiment of the invention, when the solder discharge port of the cream solder container is opened in a direction perpendicular to the horizontal screen, the cutting direction is horizontal, As described in Japanese Patent Application Laid-Open No. 8-48024, when the solder discharge port is opened in the inclined direction, the cutting direction is inclined with respect to the horizontal plane. In any case, according to this aspect, it is possible to prevent the support shaft, the sandwiching member, and the like from protruding from the movement locus of the inclined portion when the cutting tool is operated, or to reduce the amount of protrusion, and Thus, it is easy to avoid interference between the sandwiching member and the peripheral members.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. In FIG. 1, reference numeral 10 denotes a cream solder supply device. The cream solder supply device 10 includes a cream solder container 12, a cream solder cutting tool 14, and a moving device (not shown) for moving the cream solder container 12 and the cream solder cutting tool 14. The moving device such as a container includes a moving member that moves in a direction parallel to the width direction of the screen 16, a moving member driving device that moves the moving member, an elevating member that is provided to be able to move up and down on the moving member, and an elevating member. The cream solder container 12 and the cream solder cutting tool 14 are provided on a lifting member,
It is moved and moved up and down integrally by the moving device. Illustration of the moving member, the moving member driving device, the elevating member, and the elevating member driving device is omitted. The width direction of the screen 16 is a moving direction of a squeegee for printing cream solder on a printed circuit board as a circuit board through a plurality of through holes formed in the screen 16 while moving the cream solder placed on the screen 16. It is a direction perpendicular to. The cream solder supply device 10 is provided at a position corresponding to one end of the screen 16 in the squeegee moving direction.
The screen 16 has a screen frame (not shown) fixed to the periphery thereof, and is horizontally positioned and supported by a screen positioning and supporting device (not shown).

The cream solder container 12 has a cylindrical shape and is provided in a vertical direction, that is, at a right angle (vertical) to a horizontally provided screen 16, and a discharge pipe 20 serving as a solder discharge port is provided at a lower end thereof. It is detachably attached in the direction that it protrudes. A piston (not shown) is movably provided in the cream solder container 12, and the piston is pushed by the supply of air to an air chamber provided in the cream solder container 12 to store the cream solder. The cream solder contained in the container 12 is extruded from the discharge pipe 20 and discharged. By opening the air chamber to the atmosphere, the push of the piston is stopped and the discharge of cream solder is stopped. By supplying a negative pressure to the air chamber, the piston is pulled up and the cream flowing out of the discharge pipe 20 is discharged. The solder is drawn into the discharge tube 20. When the cream solder is not supplied, the air chamber is opened to the atmosphere, and the pressure in the air chamber is returned to the atmospheric pressure. An air supply device (not shown) that supplies air to the piston and the air chamber constitutes an extruder that pushes cream solder from the cream solder container 12.

The cream solder cutting tool 14 is detachably attached to a cutting tool holding member 26 provided on the elevating member. Cutting tool main body 28 of cream solder cutting tool 14
Has a horizontal portion 30 which is a parallel portion, and an inclined portion 32 inclined obliquely upward from the horizontal portion 30, that is, in an upward direction as the distance from the cream solder container 12 increases. From the horizontal portion 30, a pair of support arms 34 are extended horizontally. The pair of support arms 34 are connected to the discharge pipe 2 of the cream solder container 12.
0 in the direction perpendicular to the direction in which the cream solder container 12 and the cream solder cutting tool 14 are arranged, and at a distance larger than the diameter of the discharge pipe 20. A notch 36 having a letter-shaped cross section is formed. The pair of support arms 34 are connected to their horizontal portions 30.
It can be said that they are provided at intervals in a direction perpendicular to the direction in which

As shown in FIG. 2, a pair of U-shaped notches 40, a contact surface 42 perpendicular to the longitudinal direction of the notches 40, and a parallel contact portion are provided at the ends of the inclined portions 32 extending from the horizontal portion 30. A contact surface 43 is formed. FIG. 2 is a diagram showing a state in which the cream solder cutting tool is viewed from a direction indicated by an arrow A in FIG. As shown in FIG. 1, the cutting tool holding member 26 is inclined with respect to the cream solder container 12 at the same inclination as the inclined portion 32, and a pair of bolts 44 are provided upright at a lower portion. The lower surface of the cutting tool holding member 26 is also provided with guide surfaces 47, 48, and 49 which are chamfered.

When the cutting tool main body 28 is attached to the cutting tool holding member 26, the screw engagement of the bolt 44 with the cutting tool holding member 26 is loosened. Guided by the guide surfaces 47, 48, 49, the notch 40 is engaged with the thread portion of the bolt 44, the inclined portion 32 is engaged with the cutting tool holding member 26, and the guide surfaces 47, 48, 49 are used. , Inclined part 32
Of the cutting tool holding member 26 is avoided. The notch 40 is engaged with the threaded portions of the pair of bolts 44, and the contact surfaces 42 and 43 are
Bolts 44 in contact with the contact surfaces 46 and 45 of
The cutting tool main body 28 is fixed to the cutting tool holding member 26 by tightening. When the cutting tool main body 28 is detached from the cutting tool holding member 26, the inclined portion 32 is moved in a direction away from the cutting tool holding member 26 along the inclined direction while the bolt 44 is loosened, and the notch 40 is bolted 44. Can be removed from the threaded portion of The cutting tool main body 28 can be easily and quickly attached to and detached from the cutting tool holding member 26 without removing the bolt 44 from the cutting tool holding member 26. In the state of being held by the cutting tool holding member 26 in this manner, the horizontal portion 30 of the cutting tool main body 28 extends horizontally, the pair of support arms 34 extend horizontally from the horizontal portion 30, and the inclined portion 32 forms the horizontal portion. 30 is extended obliquely upward.

The cutting tool main body 28 is wound around a wire 50, which is a kind of wire, and is fixed by a fixing device 52. As shown in FIGS. 1 to 3, the fixing device 52 includes two pairs of sandwiching members 54 each having two pairs. These two pairs of sandwiching members 54 are attached to the inclined portion 32 of the cutting tool main body 28 by a support shaft 56 and a nut 58 which is a kind of a female screw member.

The support shaft 56 has a head 64 at one end as shown in FIG.
Is extended. Each of the two pairs of the four sandwiching members 54 is made of a disc spring and has a tapered outer peripheral surface 68 and a center hole 70 having a circular cross section. When attaching the sandwiching member 54 to the inclined portion 32, the male screw portion 66
The male screw portion 66 is fitted into the through hole 74 formed in the inclined portion 32 in a state where the spring receiver 72 and the two pairs of sandwiching members 54 are fitted to each other. 58 is screwed. The inclined portion 32 is inclined obliquely upward with respect to the horizontal portion 30, and has two pairs of sandwiching members 54,
The support shaft 56 extends from the inclined portion 32 in a direction perpendicular to a plane contacting the inclined portion 32 and in a direction approaching a plane contacting the horizontal portion 30, that is, obliquely downward.

The two pinching members 54 of each pair are fitted in the male screw portions 66 of the support shaft 56 in such a manner that the respective tapered outer peripheral surfaces 68 face each other. An annular gap 80 is formed between the outer peripheral surfaces 68 in a wedge-shaped cross section. By screwing the nut 58 into the male screw portion 66, each pair of sandwiching members 54 are sandwiched from both sides by the inclined portion 32 and the head 64 of the support shaft 56, and the taper outer surface 68 is formed by its own elastic force. Are biased toward each other. The portion of the inclined portion 32 where the sandwiching member 54 is in contact makes up the fixed receiving surface 82, the head 64 forms the movable receiving surface 84, and changes the screwing position of the nut 58 to the male screw portion 66. If the distance between the fixed receiving surface 82 and the movable receiving surface 84 is adjusted, the elastic force of the sandwiching member 54 can be adjusted.
The screwing position of the nut 58 with respect to the male screw portion 66 is adjusted in advance to a position at which a predetermined elastic force is obtained on the sandwiching member 54.

When attaching the handle 50 to the cutting tool main body 28, the operator first attaches one end of the handle 50 to the cutting tool main body 28.
One pair of sandwiching members 54 of the two pairs of sandwiching members 54 are held. One end of the bag 50 is fitted into the wedge-shaped gap 80 of the pair of sandwiching members 54, and a predetermined angle (60
The angle is preferably selected from the range of up to 420 degrees.) If it is wrapped, the arm 50 elastically deforms the pair of sandwiching members 54 by the wedge action, and pushes and expands the gap 80 between them to penetrate deeper. Then, they are elastically sandwiched and held by the sandwiching members 54. As shown in FIGS. 1 and 2, a portion of the armature 50 extending from the gap 80 of the sandwiching member 54 is hung around the cutting tool main body 28, and is hooked on the pair of notches 36 of the pair of support arms 34. The other pair of sandwiching members 54 hold the pair. After the arm 50 extends out of the gap 80 of the sandwiching member 54 and extends along the lower surface of the inclined portion 32 and the horizontal portion 30, it extends along the outer surface of one of the support arms 34, and the notch 36 of the support arm 34. Engages with the notch 36 of the other support arm 34 across the pair of support arms 34, extends along the side surface of the support arm 34, and again along the lower surface of the horizontal portion 30 and the inclined portion 32. It extends and loops so as to return to the gap 80 of the sandwiching member 54. At this time, the handle 50 is moderately tensioned, that is, the tension is loosely applied between the pair of support arms 34 to the extent that the cream solder can be cut, and the handle 50 is not likely to be cut. Is added, and is held by the other pair of sandwiching members 54. The way of holding is the same as the case of holding one end of the dressing 50 with the one pair of sandwiching members 54.

As described above, the portion stretched over the pair of support arms 34 of the arm 50 is in a state of constituting the cutting portion 86 for cutting the cream solder. Support shafts 56 and 2
The pair of sandwiching members 54 are still attached to the inclined portion 32, and the elastic force of the sandwiching members 54 is adjusted in advance,
The operator can easily attach the dressing 50 to the cutting tool main body 28 without using a tool. The pair of support arms 34 are provided horizontally and at a distance greater than the diameter of the discharge pipe 20 in a direction perpendicular to the axis of the discharge pipe 20, and the cut portion 86 is longer than the diameter of the discharge pipe 20. , Horizontal and perpendicular to the axis of the discharge pipe 20.
Further, the cutting portion 86 is positioned slightly below the opening of the discharge pipe 20 of the cream solder container 12. Further, the inclined portion 32 of the cutting tool main body 28 is inclined in a direction obliquely upward from the horizontal portion as the distance from the cutting portion 86 of the handpiece 50 in the direction perpendicular to the cutting portion 86 increases.

The cream solder cutting tool 14 is movable on the elevating member (not shown) in a horizontal direction (a direction parallel to the direction in which the pair of support arms 34 extend from the horizontal portion 30). It is provided so as to be able to approach and separate from the solder container 12, and the cutting part 86 of the box 50 is moved by the cutting tool moving device (not shown) to the cream solder container 12 as shown by a solid line in FIG. And the retreat position located on one side (the cutting tool holding member 26 side) and the other side (the side opposite to the cutting tool holding member 26) with respect to the cream solder container 12 as shown by a two-dot chain line. It is moved to a working position. The cutting portion 86 of the box 50 extends in a direction perpendicular to the axis of the discharge pipe 20, and the cutting portion 86 is provided vertically when the cream solder cutting tool 14 is moved between the retracted position and the operating position. And at right angles to the axis of the discharge pipe 20.

When the cream solder is not supplied, the cream solder container 12 and the cream solder cutting tool 14 are made to stand by at a stand-by position separated from the screen 16 in the width direction of the screen 16. At the time of supplying the cream solder, the cream solder container 12 and the cream solder cutting tool 14 are moved onto the screen 16 by a moving device such as a container, and are lowered to a position suitable for supplying the cream solder. While being pushed out of the container 12, the cream solder is moved along the width direction of the screen 16, and the cream solder is placed on the screen 16.

As described above, the cream solder in the cream solder container 12 is pushed out of the cream solder container 12 by supplying air to the air chamber, and is placed on the screen 16. If the cream solder is supplied in a sufficient amount for printing, the air chamber is opened to the atmosphere to stop the discharge of the cream solder, and the cream solder is cut in this state.
At the time of supplying the cream solder, the cream solder cutting tool 14 is at the retracted position, and is moved to the operation position at the time of cutting.
When the discharge of the cream solder is stopped, the cream solder may be connected between the discharge pipe 20 and the screen 16, or may be cut and hung from the opening of the discharge pipe 20. When the cream solder cutting tool 14 is moved from the retracted position to the operating position, the cutting portion 86 of the handle 50 is moved horizontally, and comes out of the opening of the discharge pipe 20 of the cream solder container 12 provided vertically. The cut solder is traversed at right angles and cut at a position slightly below the opening of the discharge pipe 20. In this embodiment, the cutting direction is horizontal and almost no cream solder is left on the discharge pipe 20 side.
Disconnect. At the time of discharge stop, still cream solder container 1
2 and the cream solder cutting tool 14 are on the screen 16, and the cut cream solder falls onto the screen 16. The cream solder cutting tool 14 is provided on the elevating member together with the cream solder container 12, and the cream solder container 1
2, the cream solder can be cut immediately after the end of the supply of the cream solder (discharge stop). The cream solder discharged from the discharge pipe 20 can be cut while being soft before it becomes hard.

After the cutting, a negative pressure is supplied to the air chamber of the cream solder container 12, the piston is pulled up, and the cream solder attached to the outside of the opening of the discharge pipe 20 is drawn into the discharge pipe 20. Thereafter, the air chamber is opened to the atmosphere, the pressure in the air chamber is returned to the atmospheric pressure, and the state where the cream solder is not discharged is maintained. Further, the cream solder cutting tool 14 is returned to the retracted position, the cream solder container 12 and the cream solder cutting tool 14 are raised, and returned to the standby position, where the cream solder cutting tool 14 waits for the next supply of cream solder.

When the cream solder is supplied, if the cream solder adheres to the outside of the opening of the discharge tube 20 and the adhered cream solder is solidified, the cream solder cutting tool 14 applies the cream solder before the supply. Cutting may be performed. A small amount of cream solder is extruded from the discharge tube 20 and the cream solder cutting tool 14 is moved to the operation position, and the cream solder is cut at the soft portion extruded from the discharge tube 20 to remove all of the solidified cream solder. Since the solidified cream solder is not suitable for application to a printed circuit board, cutting before supply is performed at a position off the screen 16.

When exchanging the box 50, the box 50 must be replaced.
Applying a force in a direction of detaching from the pinching member 54 to both ends of the tool, detaching the handle 50 from the pinching member 54, hanging a new handle 50 around the cutting tool body 28, and holding the pinching member 54 Well, without using tools,
Can be replaced easily and quickly.

The inclined part 32 of the cutting tool main body 28 has a horizontal part 30.
Cut part 86 of the handle 50
And at a right angle away from the support shaft 5, the holding member 54 and the support shaft 5
6 is extended obliquely downward from the inclined portion 32, so that when the cream solder is cut, the cream solder cutting tool 14 is cut.
Is moved with respect to the cream solder container 12, the pinching member 54 and the support shaft 56, etc.
Screen 16 and a screen frame fixed to the periphery of the screen 16 (not shown)
Can be avoided.

In the above embodiment, the support shaft 5
6, the elastic force of the pinching member 54 can be adjusted by adjusting the screwing position of the nut 58 to the male screw portion 66. However, as shown in FIG.
2. The shaft portion 94 and the male screw portion 96 having a smaller diameter than the shaft portion 94 may be provided so that a constant elastic force can be obtained. The spring receiver 72 and the two pairs of sandwiching members 54
, And a nut 98 is screwed into a male screw portion 96 protruding from the inclined portion 32. Thereby, the shoulder surface 100 provided on the male screw portion 96 side of the shaft portion 94 comes into contact with the inclined portion 32, the male screw portion 96 is tightened, and the pinching member 54 is attached to the cutting tool main body 28. The two pairs of sandwiching members 54 are sandwiched between the head 92 of the support shaft 90 and the inclined portion 32 of the cutting tool main body 28, and the sandwiching members 54 generate an elastic force determined by the length of the shaft portion 94. The length of the shaft portion 94 is set to a size that allows the sandwiching member 54 to obtain a predetermined elastic force.

Further, in each of the above embodiments, the fixing device 52 includes two pairs of the sandwiching members 54 of two pairs, but the fixing device 110 shown in FIGS.
As described above, only one pair of the sandwiching members 54 may be included, and both ends of the box 50 may be held by two common sandwiching members 54. In FIG. 6, the illustration of the handle 50 is omitted. First, one end of the box 50 is fitted into the wedge-shaped gap 80 of the pair of sandwiching members 54, wound around approximately 120 degrees while applying tension, and penetrated between the tapered outer peripheral surfaces 68 of the pair of sandwiching members 54. It is elastically sandwiched and held by the sandwiching member 54. The portion of the pinch member 50 extending from the gap 80 of the pinching member 54 is connected to the cutting tool main body 28.
After hooking on a pair of notches 36 of a pair of support arms 34, it intersects with a portion between one end of the arm 50 held by a pinching member 54 and a portion hooked on the notch 34, The member 54 is wound approximately 120 degrees from the side opposite to the side where the one end of the box 50 is held. Tegusu 5
While applying a tension to zero, it is wound around the pinching member 54 by approximately 120 degrees and elastically held.
It is held by the sandwiching member 54 in a state where an appropriate tension is applied. Other configurations are the same as those of the embodiment shown in FIGS. 1 to 3, and the components having the same operation are denoted by the same reference numerals and description thereof will be omitted.

Further, in each of the above embodiments, both ends of the box 50 are fixed to the cutting tool main body 28 by being sandwiched by two separate or common sandwiching members 54, respectively. You may make it fix to the cutting tool main body 28 by the pair of pinching members 54. For example, like the fixing device 120 shown in FIG.
Is rotatably attached to the inclined portion 32. The supply reel 1 is also provided on the inclined portion 32.
A lock device 124 for stopping the rotation of the motor 22 is provided.

When attaching the handle 50 to the cutting tool main body 28, the lock by the lock device 124 is released, and the supply reel 122 is made rotatable. Supply reel 12
2, a wire 5 of sufficient length to hang on the cutting tool main body 28, the pair of support arms 34, and the pair of pinching members 54.
After drawing 0, the rotation of the supply reel 122 is stopped by the lock device 124. As a result, the end on the supply reel 122 side of the box 50 is fixed to the cutting tool main body 28, and the both ends are respectively held by the pair of sandwiching members 54, as in the case of the box 50. 12
The portion pulled out from 2 is hung around the cutting tool main body 28, and is hung over a pair of notches 36 of a pair of support arms 34, and then held by a pair of sandwiching members 54. Tegusu 50,
The pair of pinching members 54 are fitted into the wedge-shaped gaps 80 between the tapered outer peripheral surfaces 68, and while being applied with an appropriate tension, penetrated between the tapered outer peripheral surfaces 68, and wound around substantially 90 degrees to elastically fit the pair of pinching members 54. And hold it.

One end of the box 50 may be fixed to the cutting tool main body 28 by a fixing member such as a bolt, and the other end may be fixed to the cutting tool main body 28 by a pair of sandwiching members 54. The bolt is screwed into the cutting tool main body 28 with one end of the tool 50 wound around the screw portion of the bolt, and one end of the tool 50 is fixed to the cutting tool body. In this state, the box 50 is wrapped around the cutting tool main body 28 and is laid over the pair of support arms 34, and the other end is held by the pair of sandwiching members 54 and fixed to the cutting tool main body 28.

In each of the above embodiments, the cream solder container 12 and the cream solder cutting tool 14 are moved in a direction parallel to the width direction of the screen 16 by a moving device such as a container. Moving equipment,
Cream solder container 12 and cream solder cutting tool 14
May be moved to an arbitrary position in a plane parallel to the screen 16.

Further, the cutting tool main body 28 is connected to the cutting tool holding member 2.
6 may be fixed so that the position can be adjusted. For example, the notch 40 provided in the inclined portion 32 of the cutting tool main body 28 is made long, and the contact surface 42 that defines the position of the cutting tool main body 28 with respect to the cutting tool holding member 26 is eliminated. By adjusting the position of the erected bolt 44 in the notch 40, the attachment position of the cutting tool main body 28 to the cutting tool holding member 26 is adjusted. By this adjustment, for example, in a state where the distance in the axial direction of the cream solder container 12 between the lower end (opening) of the discharge pipe 20 of the cream solder container 12 and the cut portion 86 of the muzzle 50 is adjusted particularly accurately, Cutting tool body 2
8 can be fixed to the cutting tool holding member 26.

Further, in relation to the viscosity of the cream solder and the amount of the cream solder contained in the cream solder container 12 (depth of the cream solder in the cream solder container 12), the air soldering in the cream solder container 12 is performed. If the supply of air is stopped and the discharge of the cream solder does not stop even when the pressure in the air chamber is returned to the atmospheric pressure, a negative pressure is supplied to the air chamber, the piston and the cream solder are pulled, and the discharge of the cream solder is stopped. In this state, the cream solder is cut by the cream solder cutting tool 14, and after the cutting, the negative pressure may be supplied to the air chamber even when the cream solder is not supplied (during standby).

Further, as described in, for example, Japanese Patent Application Laid-Open No. 8-48024, a cream solder container is provided inclined with respect to a screen, and a cream solder cutting tool is positioned with respect to the axis of the cream solder container. May be provided so as to cut the cream solder in a direction perpendicular to the vertical direction.

Further, the cream solder cutting tool according to the present invention may be provided in a cream solder supply device for supplying cream solder to an apparatus other than a screen printing machine, or is not limited to a cream solder supply device, but is capable of cutting cream solder. May be provided in a device that requires.

In addition, without departing from the scope of the claims, the present invention can be carried out in various modified and improved modes based on the knowledge of those skilled in the art.

[Brief description of the drawings]

FIG. 1 is a front view showing a main part of a cream solder supply device provided with a cream solder cutting tool according to an embodiment of the present invention.

FIG. 2 is a view on arrow A showing the cream solder cutting tool.

FIG. 3 is a front view (partial cross section) showing a state in which a sandwiching member constituting the cream solder cutting tool is attached to a cutting tool main body.

FIG. 4 is a front view showing a state in which a sandwiching member constituting a cream solder cutting tool according to another embodiment of the present invention is attached to a cutting tool main body.

FIG. 5 is a view corresponding to FIG. 2 showing a cream solder cutting tool according to still another embodiment of the present invention.

6 is a front view showing a state in which a sandwiching member constituting the cream solder cutting tool shown in FIG. 5 is attached to the cutting tool main body.

FIG. 7 is a view corresponding to FIG. 2 showing a cream solder cutting tool according to yet another embodiment of the present invention.

[Explanation of symbols]

14: Cream solder cutting tool 28: Cutting tool body 5
0: Tegusu 52: Fixing device 54: Pinching member
56: support shaft 68: tapered outer peripheral surface 80: gap
90: support shaft 110, 120: fixing device

Claims (2)

[Claims] 1. A cutting device main body having a pair of wire support portions spaced apart from each other by a fixed distance, and a fixing device for fixing both ends of a wire stretched between the pair of wire support portions to the cutting device body. Wherein the fixing device has at least one of a tapered outer peripheral surface and the other has an opposing surface facing the tapered outer peripheral surface, and a fixing device between the tapered outer peripheral surface and the opposing surface. And a biasing means for biasing the tapered outer peripheral surface and the opposing surface of the sandwiching members in a direction approaching each other. 2. The cream solder cutting tool according to claim 1, wherein the pinching member having the tapered outer peripheral surface comprises a disc spring, and the elasticity of the disc spring constitutes the urging means. .