JP2016215276A - Soldering device and flux coating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soldering device and a flux coating device using a nut which is attached to the soldering device or the flux coating device and where the fixing position of the nut can be easily changed in comparison with conventional one even when deposits generated in each device by long term use are fixed.SOLUTION: A nut 10 is screwed into a screw shaft 5 having a predetermined length. The nut 10 has one or more non-engagement parts 11 not engaging with the screw shaft 5 in parallel with a travelling direction. The non-engagement parts 11 are arranged over the entire length from the tip of the nut 10 to a rear end. According to this structure, the non-engagement parts 11 act so that fixed matter 6 is scraped off from a first discharge port 12a or a second discharge port 12b by moving the nut 10 forward and backward to the screw shaft 5.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a soldering apparatus using a nut and a flux applying apparatus that can be applied to a soldering apparatus, a flux applying apparatus for applying a flux, and the like for mounting electronic components on a printed wiring board. Specifically, a soldering apparatus using a nut that does not hinder the rotation of the nut even if a part of the flux evaporated by soldering treatment or flux application or the flux adheres and adheres to the screw shaft or the like, and The present invention relates to a flux application device.

  2. Description of the Related Art A soldering device that solders electronic components onto a printed wiring board and a flux application device that applies flux onto the printed wiring board include rails for board conveyance that can be adjusted to the width of the printed wiring board. (For example, refer to Patent Documents 1 and 2). There is also known a support member that supports the printed wiring board to be conveyed from below so that it does not bend under its own weight, and can change the fixing position with respect to the screw shaft in accordance with the size of the printed wiring board.

  For example, in the soldering process of the reflow apparatus, a substrate on which a solder paste has been printed in advance is conveyed into the reflow apparatus and heated. The solder paste includes powder solder and flux. The flux is obtained by dissolving solid components such as rosin, thixotropic agent and activator with a solvent.

  By the heating process described above, the flux is vaporized and filled in the reflow apparatus. More specifically, in the preheating zone, particularly the solvent in the flux component is vaporized to form a flux fume. Further, in the flux component, solid components such as rosin are vaporized and become fumes when they are exposed to a high temperature in this heating zone, and float inside the apparatus.

  For example, a part of the vaporized flux fumes adjusts the fixing position to support a member (screw shaft, nut, etc.) or a substrate that makes the rail for transporting the printed wiring board a rail width corresponding to the board size. If it adheres to the surface of a possible member (screw shaft, nut, etc.), it will become fluid flux fumes with a drop in temperature. The liquefied flux fume eventually solidifies. The solidified flux fume is difficult to peel off and adheres hard, so it cannot be easily peeled off by rotation of the nut. This makes it difficult to advance the nut, and makes it difficult to adjust the fixing position with respect to the screw shaft.

  In addition, in a jet soldering apparatus that jets molten solder and performs a soldering process, members (screws) that make a rail for transportation corresponding to the board size a transport rail that transports a printed wiring board by scattering of the melted solder. The solder scattered on the shaft, nut, etc.) may stick to the ball shape. Even in this case, as described above, it cannot be easily peeled off by the rotation of the nut. This makes it difficult to advance the nut, and makes it difficult to adjust the fixing position with respect to the screw shaft.

  Also in the flux application apparatus, the dropped flux adheres to and adheres to at least one of the nut and the screw shaft, and the fixed flux cannot be easily peeled off by rotating the nut. Therefore, there is a similar problem that the fixing position of the nut with respect to the screw shaft cannot be changed by moving forward and backward.

  On the other hand, as a nut having a function of peeling a film or the like attached to a screw or nut, a screw or nut in which a part of a thread is cut out by a predetermined length is disclosed (for example, Patent Documents 3 to 5). reference).

JP 2001-44619 A Japanese Patent Laid-Open No. 06-53644 JP-A-11-62938 JP 2001-27215 A Japanese Utility Model Publication No. 62-80009

  However, the devices disclosed in Patent Documents 1 and 2 have not taken any measures against the above problem. In addition, the screws or nuts disclosed in the above Patent Documents 3 to 5 are only intended to be advanced in one direction in order to loosen the screws when the coating film or the like is fixed, and to the screw shaft. No assumption is made about the provision of a device for performing an operation of changing the nut fixing position by advancing and retracting, and no countermeasure has been taken against the above problem.

  Therefore, the present invention solves such a problem, and is solidified by adhering to a member (screw shaft or nut) that changes the fixing position corresponding to the board size in the soldering device or the flux coating device. The purpose is to remove flux fume. Another object of the present invention is to remove the adhering matter adhered to the screw shaft and the nut in the same manner even when the adhering matter adheres to at least one of the nut and the screw shaft.

The technical means of the present invention taken in order to solve the above-mentioned problems are as follows.
(1) An adjustment member for a board warpage prevention mechanism of a soldering apparatus that is changed according to the width of a board to be conveyed, the adjustment member comprising: a screw shaft that is rotationally driven in a forward and reverse direction; By being driven to rotate, the fixing position with respect to the screw shaft can be changed, and a nut having a flange portion for connection, and the substrate is supported to prevent warping of the substrate, and the nut through the flange portion for connection. The nut has a screw portion from the front end to the rear end, and has one or more non-engagement portions that do not mesh with the screw shaft over the entire length of the nut, and rotates the screw shaft. When the fixing position of the substrate support part is changed, the solder attached to the screw shaft is scraped off by the end face of the non-engagement part with at least one of the forward and reverse rotations of the screw shaft. apparatus

  (2) The non-meshing portion has a discharge port at the front end and the rear end of the nut, and discharges more scraped deposits from the discharge port on the side where the deposits are scraped off. The soldering apparatus described.

  (3) The soldering apparatus according to (1), wherein when changing the fixing position of the nut with respect to the screw shaft, the attached matter is scraped off without changing the vertical position of the non-engagement portion.

  (4) An adjustment member of the flux coating apparatus that is changed in accordance with the width of the substrate to be transported, and the adjustment member is rotationally driven in the forward and reverse directions, and the screw shaft is rotationally driven. The fixing position with respect to the screw shaft can be changed, and the nut having the connecting flange portion, and the width of the board transport rail corresponding to the width of the substrate are changed and the nut is connected via the connecting flange portion. And a nut having a screw portion from the front end to the rear end thereof, and having one or more non-engagement portions that do not mesh with the screw shaft over the entire length of the nut, When changing the fixing position of the substrate support part by rotating the screw shaft, the adhering matter adhering to the screw shaft with the rotation of at least one of the forward direction and the reverse direction of the screw shaft is caused by the end face of the non-meshing part. Scraped off Lux coating apparatus.

  (5) The non-meshing portion has a discharge port at the front and rear ends of the nut, and discharges more scraped deposits from the discharge port on the side where the deposits are scraped off. The flux application apparatus described.

  (6) The flux application apparatus according to (4), wherein when changing the fixing position of the nut with respect to the screw shaft, the deposit is scraped off without changing the vertical position of the non-engagement portion.

  According to the nut used in the present invention, even if the deposit adheres to at least one of the nut and the screw shaft screwed to the nut, the deposit can be peeled off by the action of the non-meshing portion. The deposits removed with the nut are peeled off or scraped off to the non-meshing part without being fixed to the other screw shaft (screw valley) again. The rotation of the nut is not hindered, and the rotation of the nut becomes smooth. As a result, the nut fixing position can be changed (adjusted) more easily than in the prior art.

  According to the soldering apparatus and the flux applying apparatus according to the present invention, the flux fume that is attached and solidified on a member (screw shaft or nut) that changes the fixing position corresponding to the width of the substrate in each apparatus. Since it is removed while shaving, the nut can be easily moved back and forth with respect to the screw shaft, and the fixing position of the nut can be easily changed. Therefore, the flux adhering to the screw shaft and the nut can be easily removed, and the fixing position of the rail for board transfer or the board support member can be easily adjusted corresponding to the board size. Since the adhered flux can be easily removed, the time and cost required for the maintenance of the apparatus can be reduced. Further, since the soldering device and the flux application device according to the present invention are configured to be able to change the nut fixing position by rotating the screw shaft, when changing the nut fixing position, the upper and lower positions of the non-engagement portion Since there is no change, the peeled-off fixed object can be discharged out of the nut without being involved in the rotation of the screw shaft and preventing the nut from moving forward and backward.

1 is a schematic plan view showing a configuration example of a soldering apparatus 1 as a first embodiment according to the present invention. (A) And (B) is the top view and perspective view which show the structural example of the nut 10. As shown in FIG. It is AA sectional drawing of FIG. 2 (B) which shows the structural example of the nut. (A) And (B) is a partial sectional view and an enlarged sectional view showing an example of adjustment when the nut 10 is attached to the soldering apparatus 1. It is a schematic plan view which shows the structural example of the flux application | coating apparatus 2 as 2nd Embodiment.

  Hereinafter, a soldering apparatus and a flux application apparatus as embodiments according to the present invention will be described with reference to the drawings.

[First Embodiment]
With reference to FIGS. 1-3, the structural example of the soldering apparatus 1 which concerns on the 1st Embodiment of this invention is demonstrated.
As shown in FIG. 1, the soldering apparatus 1 is an apparatus that heats and solders, for example, a printed wiring board 3 or the like in which a solder paste is applied to predetermined electrodes. The soldering apparatus 1 corresponds to the transport rails 61L and 61R, the board support portion 66 that supports the printed wiring board 3 from the vertically downward direction corresponding to the width of the printed wiring board 3, and the width of the printed wiring board 3. The adjustment member is changed. As the adjustment member, there are provided screw shafts 5 and 50 and a nut 10 which can change the fixing position with respect to the screw shafts 5 and 50, respectively.

  The transport rail 61L is set as a fixed rail, and the transport rail 61R is set as a movable rail. As an adjustment member for changing the fixing position of the transport rail 61R, the soldering apparatus 1 includes the following members. The transport rail 61R is supported by a rail support portion 62. The rail support portion 62 is connected to the connection hole 14 of the nut 10 by a screw or the like. The nut 10 is screwed onto the screw shaft 5. Both ends of the screw shaft 5 are rotatably supported by a pair of bearing portions 63A, and are rotated by a rotating member 64A. As the screw shaft 5 rotates in the forward / reverse direction, the nut 10 engaged therewith advances and retreats along the screw shaft 5. As a result, the transport rail 61R advances and retreats along the screw shaft 5. Although the rail 61L for conveyance is supported by the rail support part 65, since this rail support part 65 is comprised so that it may not mesh with the screw shaft 5 (not shown), even if the screw shaft 5 rotates. The transport rail 61L does not move and is fixed at that position.

  As described above, when the rotating member 64A is rotated, the nut 10 moves forward and backward, the screwing position of the screw shaft 5 and the nut 10 changes, and the fixing position of the nut 10 with respect to the screw shaft 5 can be changed. Thereby, the width between the pair of transport rails 61L and 61R can be changed in accordance with the width of the printed wiring board 3.

  As indicated by the dotted line in the figure, when the size of the printed wiring board 3 is large, the printed wiring board 3 warps (deflects) due to its own weight during conveyance. As a warp preventing mechanism for the printed wiring board 3, the soldering apparatus 1 is provided with a board support portion 66. The soldering apparatus 1 includes the following members as adjustment members that change the fixing position of the substrate support portion 66 with respect to the screw shaft 50. The substrate support part 66 is supported by a support part 67. The support portion 67 is connected to the connection hole 14 of the nut 10 by a screw or the like. The nut 10 is screwed onto the screw shaft 50. Both ends of the screw shaft 50 are rotatably supported by the pair of bearing portions 63B, and are rotated by the rotating member 64B. As the screw shaft 50 rotates in the forward / reverse direction, the nut 10 meshing with the screw shaft 50 advances and retreats along the screw shaft 50. As a result, the substrate support portion 66 advances and retracts along the screw shaft 50.

  As described above, when the rotating member 64B is rotated, the nut 10 moves forward and backward, the screwing position of the screw shaft 50 and the nut 10 changes, and the fixing position of the nut 10 with respect to the screw shaft 50 can be changed. Thereby, the board | substrate support part 66 can change the fixing position corresponding to the width | variety of the printed wiring board 3. FIG.

  A nut 10 shown in FIG. 2 is screwed into a screw shaft 5 (see FIG. 1) having a predetermined length, and the fixing position of the nut 10 can be changed with respect to the screw shaft 5. In FIG. 2A, the thread valley 16 of the nut 10 is indicated by a thin line arc. The thread 17 of the nut 10 is indicated by a thick arc.

  The nut 10 shown in FIG. 2B has four non-engagement portions 11 in this example that do not mesh with the screw shaft 5. One end portion of the nut 10 has a flange portion 13 for connection to another member. The non-meshing portion 11 is formed by cutting out the thread of the nut 10 in an arc shape outward. In the case of this example, the flange portion 13 includes four connection holes 14 so that the flange portion 13 can be connected to other members with screws or the like.

  When four non-meshing portions 11 are provided as in this example, it is preferable that the non-meshing portions 11 are formed so as to maintain an angular interval of approximately 90 degrees. The four non-meshing portions 11 can efficiently peel off the deposits to be described later even when the deposits are harder.

  The shape of the non-meshing portion 11 is not limited to an arc shape. Although the diameter (width) of the non-engagement part 11 is not ask | required, it is preferable that the notch depth is deeper than the screw trough of the nut 10. FIG. The angle θ (see FIG. 2A) formed by the screw thread 17 and the non-meshing portion 11 is not limited, but is preferably 90 degrees or less, and the non-meshing portion 11 adheres an adherend described later more firmly. Even if it is, it can be stripped off efficiently.

  As shown in FIG. 3, the non-engagement portion 11 has a total length (whole) from the front end to the rear end of the nut 10 in parallel with the traveling direction of the nut 10 with respect to the screw shaft 5 (not shown in this figure). It is provided over. The opening on one end side of the nut 10 forms the first discharge port 12a, and the opening on the other end side forms the second discharge port 12b.

  The nut 10 is provided with four non-meshing portions 11, but the present invention is not limited to this, and one or more non-meshing portions 11 may be provided. For example, when there are two non-meshing parts 11, the pair of non-meshing parts 11 are preferably provided symmetrically in the radial direction of the nut 10. When three non-meshing portions 11 are provided, it is preferable to maintain an angular interval of approximately 120 degrees. When a plurality of the non-engagement portions 11 are provided, the area where the screw shaft 5 and the nut 10 come into contact with each other is reduced, so that even if the adhered matter between the screw shaft 5 and the nut 10 is attached harder, it is efficiently peeled off. be able to.

[Material]
The nut 10 is made of metal such as brass, but stainless steel may be used. In the case of using stainless steel, it is more preferable that the surface is nitrided by a known means after processing because the surface becomes hard and smooth. The same applies to the nut material. The nut 10 and the screw shaft 5 are trapezoidal screws in this embodiment, but are not limited thereto, and may be, for example, ball screws or triangular screws.

[Production method]
After the thread is provided on the nut 10 by a known method, the non-engagement portion 11 is formed on the nut 10 by an end mill or the like. After making a hole in the nut 10, the burr is removed. The non-meshing portion 11 is formed so as to cut out the thread of the nut 10. The non-meshing portion 11 is formed over the entire length (whole) from the front end to the rear end of the nut 10 in parallel with the traveling direction with respect to the screw shaft 5.

  Then, with reference to FIG.1 and FIG.4, the example of adjustment of the fixing position of the nut 10 attached to the soldering apparatus 1 is demonstrated. In FIG. 4, only one portion of the non-meshing portion 11 is illustrated for explanation.

  As shown in FIG. 1, the transport rail 61L is a fixed rail whose position in the width direction is fixed, and the transport rail 61R and the substrate support section 66 are movable rails. As described above, the screw shafts 5 and 50 and the nut 10 change the fixing positions of the transport rail 61R and the substrate support portion 66. When the rotating members 64A and 64B are rotated, the nut 10 advances and retreats. For example, when the width of the printed wiring board 3 is large, when the rotating members 64A and 64B are rotated in the clockwise direction when viewed from the right side of the drawing, the transport rail 61R and the board support portion 66 are separated from the transport rail 61L (see FIG. The nut 10 moves to the right side in the middle. Further, when the width of the printed wiring board 3 is small, when the rotating members 64A and 64B are rotated counterclockwise when viewed from the right side of the drawing, the transport rail 61R and the board support portion 66 approach the transport rail 61L ( The nut 10 moves to the left side in the figure.

  By changing the screwing position of the screw shaft 5 and the nut 10, the fixing position of the nut 10 with respect to the screw shaft 5 can be changed. Thereby, the width between the pair of transfer rails 61L and 61R can be changed corresponding to the size of the printed wiring board 3, and the fixing position of the board support portion 66 can be changed corresponding to the size of the printed wiring board 3. Can be changed.

  As shown in FIG. 4A, flux fume or the like adheres to at least one peak or valley of the nut 10 and the screw shaft 5 by using the soldering apparatus 1 for a long period of time. This deposit is eventually solidified to become a fixed article 6. By moving the nut 10 back and forth, the fixed object 6 is peeled off and scraped off mainly by the end face of the non-meshing portion 11 of the nut 10. The fixed object 6 (shaving residue) scraped off is accumulated in the non-meshing portion 11 and dropped from the first discharge port 12a or the second discharge port 12b. Since the scraps can be discharged from either the first discharge port 12a or the second discharge port 12b, the fixing position of the nut 10 can be moved to the left or right in the drawing according to the size of the printed wiring board 3. can do.

  This shaving residue is scraped mainly from the direction of travel of the nut 10. For example, when the nut 10 moves to the left side in the figure, a large amount of shavings is discharged from the first discharge port 12a. When the nut 10 is further advanced to the left side in the figure, the shavings are accumulated in the non-engagement portion 11 and are also discharged from the second discharge port 12b. On the other hand, when the nut 10 moves to the right side in the figure, a large amount of shavings is discharged from the second discharge port 12b. Further, when the nut 10 is advanced to the right side in the figure, the scraps are collected in the non-engagement portion 11 and are also discharged from the first discharge port 12a. As a result, the scraped scraps do not adhere to the nut 10 and the screw shaft 5 again to prevent the nut 10 from moving forward and backward.

  When the screw shaft 5 is rotated so that the nut 10 advances on the screw shaft 5 in this manner, the non-meshing portion 11 acts to scrape and remove the fixed object 6. As shown in FIG. 4B, the fixed object 6 scraped off by the non-meshing portion 11 is accumulated in the non-meshing portion 11 and falls from the first discharge port 12a or the second discharge port 12b. Thereby, the fixing position of the nut 10 with respect to the screw shaft 5 can be changed relatively easily. The operation of the substrate support portion 66 shown in FIG. 1 is the same as the operation of the transport rail 61R. Although the operation is not shown, when the screw shaft 50 is rotated, the nut 10 scrapes off the fixed object 6 attached to the nut 10 or the screw shaft 50, and the scraped fixed object 6 is removed from the first discharge port 12a or the second discharge port. By moving forward and backward while dropping from the outlet 12b, the fixed position can be easily changed.

  As described above, according to the nut 10, when the soldering apparatus 1 is used for a long time, the nut 10 rotates so as to advance on the screw shaft 5 even if the fixed object 6 exists on at least one of the nut 10 and the screw shaft 5. The non-engagement part 11 acts so that the fixed thing 6 may be shaved off only by making it do. Therefore, the flux fume that adheres to the screw shafts 5 and 50 and the nut 10 and solidifies can be easily removed, and the fixing position of the nut 10 can be easily changed.

  Therefore, the fixed object 6 attached to the screw shafts 5 and 50 and the nut 10 can be easily removed, and the fixing position of the transport rail 61R or the board support 66 can be easily adjusted according to the width of the printed wiring board 3 to be transported. Can be adjusted. Since the adhered adhering matter 6 can be easily removed, the time and cost required for the maintenance of the apparatus can be reduced.

  Since the nut 10 has a non-engagement portion 11 and does not rotate, and the screw shafts 5 and 50 rotate, the nut 10 can be fixed to the screw shafts 5 and 50 so that the nut 10 can be fixed. Is changed, the vertical position of the non-meshing portion 11 does not change. For this reason, the peeled fixed object 6 is again caught in the rotation of the screw shafts 5 and 50 and discharged out of the nut 10 without preventing the nut 10 from moving forward and backward.

[Second Embodiment]
Then, with reference to FIG. 5, the structural example of the flux application | coating apparatus 2 as 2nd Embodiment is demonstrated. The same members as those used in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The flux coating apparatus 2 according to the present invention includes conveyance rails 61 </ b> L and 61 </ b> R and an adjustment member that is changed according to the width of the printed wiring board 30. As the adjusting member, a screw shaft 5 having a predetermined length and a nut 10 that can be screwed into the screw shaft 5 to change a fixing position with respect to the screw shaft 5 are provided.

  The transport rail 61L is set as a fixed rail, and the transport rail 61R is set as a movable rail. As an adjustment member that changes the fixing position of the conveyance rail 61R, the flux application device 2 includes the following members. The transport rail 61R is supported by a rail support portion 62. The rail support portion 62 is connected to the connection hole 14 of the flange portion 13 of the nut 10 by a screw or the like. The nut 10 is screwed onto the screw shaft 5. Both ends of the screw shaft 5 are rotatably supported by a pair of bearing portions 63A, and are rotated by a rotating member 64A. Due to the rotation of the screw shaft 5, the nut 10 engaged with the screw shaft 5 advances and retreats along the screw shaft 5. As a result, the transport rail 61R advances and retreats along the screw shaft 5. Although the rail 61L for conveyance is supported by the rail support part 65, since this rail support part 65 is comprised so that it may not mesh with the screw shaft 5 (not shown), even if the screw shaft 5 rotates. The transport rail 61L does not move and is fixed at that position.

  As described above, when the rotating member 64A is rotated, the nut 10 moves forward and backward, the screwing position of the screw shaft 5 and the nut 10 changes, and the fixing position of the nut 10 with respect to the screw shaft 5 can be changed. Thereby, the width between the pair of transfer rails 61L and 61R can be changed in accordance with the size of the printed wiring board 30.

  The nut 10 performs the same operation as the nut 10 of the first embodiment shown in FIGS. 4 (A) and 4 (B). At this time, even if the nut 10 is fixed to at least one of the nut 10 and the screw shaft 5 such as flux fume, only the rotating member 64A is rotated so that the nut 10 advances on the screw shaft 5 as shown in FIG. The non-engagement portion 11 not shown acts to remove the sticking and discharge from the first discharge port 12a or the second discharge port 12b. Thereby, the flux fume which adhered to the screw shaft 5 and the nut 10 and solidified can be easily removed, and the fixing position of the nut 10 can be easily changed. Therefore, the time and cost required for the maintenance of the flux application device 2 can be reduced.

  In the present invention, even if the adhered matter is fixed to at least one of the nut and the screw shaft, the adhered matter can be peeled off by the action of the non-meshing portion. Applicable when fixed. For example, the present invention is extremely suitable when applied to a soldering apparatus, a flux coating apparatus, a paint coating apparatus, and the like to which a flux fume is fixed.

DESCRIPTION OF SYMBOLS 1 Soldering apparatus 2 Flux application apparatus 5, 50 Screw shaft 10 Nut 11 Non-meshing part 12a 1st discharge port 12b 2nd discharge port 13A Flange part 14A Connection hole 61L, 61R Rail for conveyance 62, 65 Rail support part 63A , 63B Bearing part 64A, 64B Rotating member 66 Substrate support part 67 Support part

The present invention relates to a soldering apparatus using a nut and a flux applying apparatus that can be applied to a soldering apparatus, a flux applying apparatus for applying a flux, and the like for mounting electronic components on a printed wiring board. Specifically, a soldering device using a nut that does not interfere with the rotation of the screw shaft even if part of the flux vaporized by soldering treatment or flux application or the flux adheres and adheres to the screw shaft, etc. And a flux application apparatus.

For example, a part of the vaporized flux fumes adjusts the fixing position to support a member (screw shaft, nut, etc.) or a substrate that makes the rail for transporting the printed wiring board a rail width corresponding to the board size. If it adheres to the surface of a possible member (screw shaft, nut, etc.), it will become fluid flux fumes with a drop in temperature. The liquefied flux fume eventually solidifies. The solidified flux fume is hard to peel off and adheres hard, so it cannot be easily peeled off by rotation of the screw shaft . This makes it difficult to advance the nut, and makes it difficult to adjust the fixing position with respect to the screw shaft.

In addition, in a jet soldering apparatus that jets molten solder and performs a soldering process, members (screws) that make a rail for transportation corresponding to the board size a transport rail that transports a printed wiring board by scattering of the melted solder. The solder scattered on the shaft, nut, etc.) may stick to the ball shape. Even in this case, as described above, it cannot be easily removed by the rotation of the screw shaft . This makes it difficult to advance the nut, and makes it difficult to adjust the fixing position with respect to the screw shaft.

Also in the flux coating apparatus, the dropped flux, adhere and fix the screw shaft, not peel off flux briefly fixed in rotation of the screw shaft. Therefore, there is a similar problem that the fixing position of the nut with respect to the screw shaft cannot be changed by moving forward and backward.

Therefore, the present invention solves such a problem, and is solidified by adhering to a member (screw shaft or nut) that changes the fixing position corresponding to the board size in the soldering device or the flux coating device. The purpose is to remove flux fume. Another object is to remove the deposits firmly fixed similarly to the screw shaft and the nut even when the deposit is fixed to the screw shaft.

The technical means of the present invention taken in order to solve the above-mentioned problems are as follows.
(1) a regulating member of the substrate warp preventive mechanism of the soldering apparatus to be changed to correspond to the width of the substrate to be transported, adjustment member includes a threaded shaft which is rotating drive, screw shaft is rotated Thus, the fixing position with respect to the screw shaft can be advanced and retracted , and the nut having the connecting flange portion and the substrate is supported to prevent the substrate from warping and fixed to the nut via the connecting flange portion. The nut has a screw portion from the front end to the rear end thereof, and has one or more non-engagement portions that do not mesh with the screw shaft over the entire length of the nut, and the substrate is rotated by rotating the screw shaft. when changing the fixing position of the support portion, soldering apparatus substances attached to the screw axis, with the rotation of the screw shaft, which is scraped by the end face of the non-meshing portion.

(4) The adjustment member of the flux coating apparatus to be changed to correspond to the width of the substrate to be transported, adjustment member includes a threaded shaft which is rotating driven by the screw shaft is rotated, the screw The nut can be moved back and forth with respect to the shaft and has a connecting flange, and the width of the board transport rail is changed according to the width of the board and is fixed to the nut via the connecting flange. And a nut having a screw portion from the front end to the rear end thereof, and having one or more non-engagement portions that do not mesh with the screw shaft over the entire length of the nut. when rotated by changing the fixing position of the substrate support, deposits adhered to the screw axis, with the rotation of the screw shaft, the flux coating apparatus to be scraped by the end face of the non-meshing portion.

According to the nut to be used in the present invention can also be fixed is deposit to the screw shaft screwed to the person the nut, stripping the deposit by the action of the non-meshing portion. Deposits was stripped with nut, since the scraped or dropped peel the non-meshing part without re-secured to the other of the screw shaft (valley of the screw), the screw by the stripped deposit (shavings) The rotation of the shaft is not hindered, and the rotation of the screw shaft becomes smooth. As a result, the nut fixing position can be changed (adjusted) more easily than in the prior art.

According to the soldering apparatus and the flux applying apparatus according to the present invention, the flux fume that is attached and solidified on a member (screw shaft or nut) that changes the fixing position corresponding to the width of the substrate in each apparatus. Since it is removed while shaving, the nut can be easily moved back and forth with respect to the screw shaft, and the fixing position of the nut can be easily changed. Accordingly, the flux adhering to the screw shaft can be easily removed, and the fixing position of the substrate transport rail or the substrate support member can be easily adjusted in accordance with the substrate size. Since the adhered flux can be easily removed, the time and cost required for the maintenance of the apparatus can be reduced. Further, since the soldering device and the flux application device according to the present invention are configured to be able to change the nut fixing position by rotating the screw shaft, when changing the nut fixing position, the upper and lower positions of the non-engagement portion Since there is no change, the peeled-off fixed object can be discharged out of the nut without being involved in the rotation of the screw shaft and preventing the nut from moving forward and backward.

The nut 10 shown in FIG. 2 can be screwed into screw shafts 5 and 50 (see FIG. 1) having a predetermined length, and the fixing position of the nut 10 can be changed with respect to the screw shafts 5 and 50 . is there. In FIG. 2A, the thread valley 16 of the nut 10 is indicated by a thin line arc. The thread 17 of the nut 10 is indicated by a thick arc.

The nut 10 shown in FIG. 2B has four non-engagement portions 11 in this example that do not mesh with the screw shafts 5 and 50 . One end portion of the nut 10 has a flange portion 13 for connection to another member. The non-meshing portion 11 is formed by cutting out the thread of the nut 10 in an arc shape outward. In the case of this example, the flange portion 13 includes four connection holes 14 so that the flange portion 13 can be connected to other members with screws or the like.

As shown in FIG. 3, the non-meshing portion 11 has a total length (overall from the front end to the rear end of the nut 10 in parallel with the traveling direction with respect to the screw shafts 5 , 50 (not shown in this figure) of the nut 10. ). The opening on one end side of the nut 10 forms the first discharge port 12a, and the opening on the other end side forms the second discharge port 12b.

The nut 10 is provided with four non-meshing portions 11, but the present invention is not limited to this, and one or more non-meshing portions 11 may be provided. For example, when there are two non-meshing parts 11, the pair of non-meshing parts 11 are preferably provided symmetrically in the radial direction of the nut 10. When three non-meshing portions 11 are provided, it is preferable to maintain an angular interval of approximately 120 degrees. When a plurality of non-meshing portions 11 are provided, the area where the screw shafts 5 and 50 and the nut 10 come into contact with each other is reduced, so that even if the deposit between the screw shafts 5 and 50 and the nut 10 is attached more firmly. It can be peeled off efficiently.

[Material]
The nut 10 is made of metal such as brass, but stainless steel may be used. In the case of using stainless steel, it is more preferable that the surface is nitrided by a known means after processing because the surface becomes hard and smooth. The same applies to the nut material. In this embodiment , the nut 10 and the screw shafts 5 and 50 are trapezoidal screws, but are not limited thereto, and may be ball screws or triangular screws, for example.

[Production method]
After the thread is provided on the nut 10 by a known method, the non-engagement portion 11 is formed on the nut 10 by an end mill or the like. After making a hole in the nut 10, the burr is removed. The non-meshing portion 11 is formed so as to cut out the thread of the nut 10. The non-meshing portion 11 is formed over the entire length (whole) from the front end to the rear end of the nut 10 in parallel with the traveling direction with respect to the screw shafts 5 and 50 .

As shown in FIG. 4A, flux fumes and the like adhere to the crests and troughs of the screw shaft 5 by using the soldering device 1 for a long period of time. This deposit is eventually solidified to become a fixed article 6. By moving the nut 10 back and forth, the fixed object 6 is peeled off and scraped off mainly by the end face of the non-meshing portion 11 of the nut 10. The fixed object 6 (shaving residue) scraped off is accumulated in the non-meshing portion 11 and dropped from the first discharge port 12a or the second discharge port 12b. Since the scraps can be discharged from either the first discharge port 12a or the second discharge port 12b, the fixing position of the nut 10 can be moved to the left or right in the drawing according to the size of the printed wiring board 3. can do.

When the screw shaft 5 is rotated so that the nut 10 advances on the screw shaft 5 in this manner, the non-meshing portion 11 acts to scrape and remove the fixed object 6. As shown in FIG. 4B, the fixed object 6 scraped off by the non-meshing portion 11 is accumulated in the non-meshing portion 11 and falls from the first discharge port 12a or the second discharge port 12b. Thereby, the fixing position of the nut 10 with respect to the screw shaft 5 can be changed relatively easily. The operation of the substrate support portion 66 shown in FIG. 1 is the same as the operation of the transport rail 61R. Although the operation is not shown, when the screw shaft 50 is rotated, the nut 10 scrapes off the fixed object 6 attached to the screw shaft 50, and the scraped fixed object 6 is removed from the first discharge port 12a or the second discharge port 12b. By moving forward and backward while dropping, the fixed position can be easily changed.

As described above, according to the nut 10, even when the screw shafts 5 and 50 have the fixed object 6 when the soldering apparatus 1 is used for a long period of time, the nut 10 is simply rotated so as to advance on the screw shafts 5 and 50. The non-meshing portion 11 acts to scrape and remove the fixed object 6. Therefore, the flux fume that adheres to the screw shafts 5 and 50 and the nut 10 and solidifies can be easily removed, and the fixing position of the nut 10 can be easily changed.

The nut 10 performs the same operation as the nut 10 of the first embodiment shown in FIGS. 4 (A) and 4 (B). At this time, even if there is sticking of the flux fumes such as the screw shaft 5, the nut 10 only rotates the rotary member 64A so as to move on the screw shaft 5, the non-engaging portion 11 which is not shown in this figure, the fixed Is removed, and the air is discharged from the first discharge port 12a or the second discharge port 12b. Thereby, the flux fume which adhered to the screw shaft 5 and the nut 10 and solidified can be easily removed, and the fixing position of the nut 10 can be easily changed. Therefore, the time and cost required for the maintenance of the flux application device 2 can be reduced.

The present invention, also be fixed is fouling the screw shaft, it is possible to strip the deposits by the action of the non-meshing portion, it can be applied to a case where the deposits sticking to the screw shaft. For example, the present invention is extremely suitable when applied to a soldering apparatus, a flux coating apparatus, a paint coating apparatus, and the like to which a flux fume is fixed.

Claims (6)

An adjustment member for a board warpage prevention mechanism of a soldering apparatus that is changed according to the width of a board to be conveyed,
The adjustment member is
A screw shaft that is driven to rotate in forward and reverse directions;
The screw shaft is driven to rotate, so that a fixing position with respect to the screw shaft can be changed and a nut having a connecting flange portion;
A substrate support portion that supports the substrate and prevents warping of the substrate and is fixed to the nut via the connecting flange portion;
The nut has a thread portion from the front end to the rear end, and has one or more non-engagement portions that do not mesh with the screw shaft over the entire length of the nut,
When changing the fixing position of the substrate support part by rotating the screw shaft,
A soldering apparatus in which an adhering matter adhering to the screw shaft is scraped off by an end surface of the non-meshing portion with rotation of at least one of a forward direction and a reverse direction of the screw shaft.
The non-meshing part is
The nut has a discharge port at the front end and the rear end,
2. The soldering apparatus according to claim 1, wherein a larger amount of the attached matter is discharged from the discharge port on the side where the attached matter is removed.
When changing the fixing position of the nut relative to the screw shaft,
The soldering apparatus according to claim 1, wherein the deposit is scraped off without changing the vertical position of the non-engagement portion.
An adjustment member of a flux application device that is changed according to the width of the substrate to be conveyed,
The adjustment member is
A screw shaft that is driven to rotate in forward and reverse directions;
The screw shaft is driven to rotate, so that a fixing position with respect to the screw shaft can be changed and a nut having a connecting flange portion;
The width of the substrate transport rail is changed corresponding to the width of the substrate, and the substrate transport rail support portion fixed to the nut via the connecting flange portion,
The nut has a thread portion from the front end to the rear end, and has one or more non-engagement portions that do not mesh with the screw shaft over the entire length of the nut,
When changing the fixing position of the rail for conveying the substrate by rotating the screw shaft,
A flux coating apparatus in which deposits adhering to the screw shaft are scraped off by an end surface of the non-engagement portion in accordance with rotation of at least one of a forward direction and a reverse direction of the screw shaft.
The non-meshing part is
The nut has a discharge port at the front end and the rear end,
The flux application apparatus according to claim 4, wherein a larger amount of the attached matter is discharged from the discharge port on the side where the attached matter is removed.
When changing the fixing position of the nut relative to the screw shaft,
The flux application apparatus according to claim 4, wherein the deposit is scraped off without changing the vertical position of the non-engagement portion.

Images