JP2017217835A - Stretching jig for mask plate for screen printing and mask plate for screen printing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stretching jig which can stretch a mask plate with a uniform tensile force.SOLUTION: A stretching jig 10 has: a lock pin 22; two movable bodies 16a, 16b and two support bodies 12c, 12d which are positioned on four sides; a drive shaft 25 and a driven shaft 27 which are provided along two movable bodies 16a, 16b; and eccentric cams 37, 38 which are respectively provided on the drive shaft 25 and the driven shaft 27. The stretching jig moves the movable bodies 16a, 16b in a direction in which the movable bodies are respectively separated from opposite support bodies 12c, 12d via the eccentric cams 37, 38, and applies a required tensile force to a mask plate 19 by the lock pin 22 thereby performing stretching. Plural lock pins 22a, 22b, 22c of lock pins 22 are provided at positions opposite to the eccentric cams 37, 38 provided on the drive shaft 25 and the driven shaft 27 so that a space among said plural lock pins is smaller than a space among plural lock pins 22 at other positions.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a screen printing mask plate tensioning jig and a screen printing mask plate.

In the case of various screen printings, a metal mask plate or a mesh-like mask is stretched on a stretching jig, and the stretching jig is set on a printing machine to perform required printing.
Various types of tensioning jigs of this type are known. The applicant of the present application has developed a tensioning jig shown in Patent Document 1.
The stretching jig includes a support frame body assembled in a rectangular shape by four support bodies, and each of the support bodies adjacent to one of the four support bodies of the support frame body. A movable body supported so as to be movable toward and away from each of the two adjacent support bodies, and the two movable bodies and the other adjacent support body. A locking portion (locking pin) that locks to the peripheral edge portion of the sheet-like material to be moved, and the movable body is moved in a direction away from each opposing support body, and locked to the locking portion. A sheet-like material tensioning jig provided with a moving mechanism for tensioning the sheet-like material by applying a required tension to the sheet-like material, wherein the one adjacent support is rotatable about an axis. Drive shaft supported by one of the body supports, centered on the axis A driven shaft connected to the drive shaft via a bevel gear mechanism, the drive shaft, and the drive shaft, A cam that is provided on a driven shaft and acts on each corresponding movable body by rotating the drive shaft and the driven shaft, and moves the movable body in a direction away from the opposing support body; A gear mechanism that rotates the drive shaft by inserting a tool from the surface side of the support frame and rotating the tool is provided.

Japanese Patent Laying-Open No. 2015-131388

According to the above-mentioned tensioning jig, since the tensioning operation can be performed from the surface side of the support frame with a tool such as a hexagon wrench, there is an advantage that the tensioning operation of the mask plate is facilitated.
However, when the present inventor examined, in the case of the above-mentioned tensioning jig, an eccentric cam is applied to the movable member, and both the movable members are moved away from each of the opposing supports, whereby the locking pin is moved. Since the mask plate is stretched through the mask, the mask plate is stretched. Therefore, a larger force is applied to the lock pin corresponding to the eccentric cam than the lock pin of the other part. It has been found that there is a possibility that it cannot be tensioned with a sufficient tension.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a screen printing mask plate tensioning jig and a screen printing mask that can stretch a mask plate with a more uniform tension. To provide a board.

In order to achieve the above object, the present invention comprises the following arrangement.
That is, the screen printing mask plate tensioning jig according to the present invention includes a support frame body assembled in a rectangular shape by four support bodies, and two adjacent ones of the four support bodies of the support frame bodies. A movable body supported by each of the two support bodies so as to be movable toward and away from each of the other adjacent two support bodies; and the two movable bodies and the other movable body. Of the two adjacent supports, the lock pins that are provided on the two adjacent supports and enter into the lock holes provided at required intervals on each edge of the mask plate to be stretched A drive shaft supported by the support so as to be rotatable about an axis, and the other support body of the two adjacent support bodies, and the support body. The body is supported so that it can rotate around the axis. A driven shaft connected to the drive shaft via a bevel gear mechanism, and provided on at least both ends of the drive shaft and the driven shaft, the drive shaft and the driven shaft being rotated about an axis. Thus, an eccentric cam that pushes each corresponding movable body outward and moves the movable body in a direction away from the opposing support body, and one end side of the drive shaft and the driven shaft are The drive frame and the drive shaft are driven by inserting a tool from the surface side of the support frame and rotating the tool. The driven shaft is rotated, and the movable body is moved away from each of the opposing support bodies by the eccentric cam, A tensioning jig for a screen printing mask plate comprising a gear mechanism for tensioning the mask plate by applying a required tension to the mask plate locked by a stop pin, and among the locking pins, The intervals between the plurality of locking pins at positions facing the eccentric cams provided on the drive shaft and the driven shaft are set to be smaller than the intervals between the plurality of locking pins at other positions. It is characterized by being.

The plurality of locking pins provided on the other two adjacent support bodies are provided at positions facing and opposite to the plurality of locking pins provided on the two opposing movable bodies. can do.
In the arrangement of the locking pins provided in the tensioning jig, a different pitch part different from the pitch of other parts is provided at an arbitrary position so that the mask plate is not erroneously attached to the tensioning jig in the front and back and left and right directions. It can be provided.
The gear mechanism may be a worm gear mechanism.

  A screen printing mask plate according to the present invention is a screen printing mask plate stretched by any of the above screen printing mask plate stretching jigs, and the engagement of the tensioning jigs at each edge portion. Locking holes into which the locking pins enter are provided in the same arrangement as that of the pins.

  According to the present invention, the tension on the mask plate from each locking pin can be made uniform, and the mask plate tensioning jig for screen printing and the screen printing can be stretched with a more uniform tension. A mask plate can be provided.

It is a top view of a tension jig. It is a partially notched top view of a tension jig. It is a partial enlarged plan view of a tension jig. It is sectional drawing which shows a cam mechanism. It is sectional drawing which shows a cam mechanism. It is explanatory drawing of a mask board. It is explanatory drawing which shows the structure of a holding plate. It is explanatory drawing which shows the structure of a holding plate.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 is a plan view of the tensioning jig 10, FIG. 2 is a partially cutaway plan view of the tensioning jig 10, FIG. 3 is a partially enlarged plan view thereof, and FIGS. 4 and 5 are sectional views showing a cam mechanism.
As shown in FIGS. 1 and 2, the tension jig 10 includes a support frame body 14 assembled in a rectangular shape by four support bodies 12 a, 12 b, 12 c, and 12 d.
Each support body 12a-12d has comprised the hollow body of a cross-sectional rectangle as shown in FIG. 4, FIG.
And the support bodies 12a-12d are assembled | attached so that the whole may form the rectangular support frame body 14 by arrange | positioning the hollow corner body 15 which two adjacent walls opened at each corner part. Yes.

  As shown in FIGS. 2 to 5, one of the four support bodies 12 a to 12 d of the support frame body 14 is adjacent to the other one of the two support bodies 12 a and 12 b in the respective support bodies 12 a and 12 b. The movable bodies 16a and 16b are arranged so as to be movable toward and away from the opposing support bodies 12c and 12d of the two support bodies 12c and 12d. That is, the movable body 16a is disposed in the support 12a so as to be movable toward and away from the opposing support 12c in the X direction (FIG. 3). The movable body 16b is disposed in the support 12b so as to be movable toward and away from the opposing support 12d in the Y direction (FIG. 3).

The movable bodies 16a and 16b extend through the support bodies 12a and 12b over substantially the entire length of the support bodies 12a and 12b, respectively. The movable bodies 16a and 16b have a U-shaped cross section and have the necessary strength.
The movable bodies 16a and 16b are fixed on the slider 17, respectively, and can move smoothly in the X direction and the Y direction together with the slider 17, respectively. Reference numeral 18 denotes a roller constituting the slider 17.
Thus, since the movable bodies 16a and 16b are fixed to the slider 17 and moved, the movable bodies 16a and 16b can move smoothly toward and away from the opposing support bodies 12c and 12d.

As shown in FIGS. 1, 2, 4, and 5, each movable body 16 a, 16 b is provided with a plurality of locking pins 22 at a required interval as will be described later. The locking pin 22 protrudes outward from the surface of the support bodies 12a and 12b through a long hole 23 or a slit provided in the support bodies 12a and 12b. The locking pin 22 can enter a locking hole 20 (FIG. 6) provided at the peripheral edge of the mask plate 19. The locking pin 22 is locked to the edge of the locking hole 20.
Similarly, the support bodies 12c and 12d are also provided with a plurality of locking pins 22 which are locked in locking holes 20 (FIG. 6) provided on the peripheral edge of the mask plate 19 with a required interval described later. .

As shown in FIG. 2, a drive shaft 25 is supported in the support 12a via a bearing 26 so as to be rotatable about an axis. The drive shaft 25 extends substantially over the entire length of the support 12a.
A driven shaft 27 is supported in a support 12b adjacent to the support 12a via a bearing 28 so as to be rotatable about an axis. The driven shaft 27 extends over substantially the entire length of the support 12b.
A bevel gear 30 is fixed on the drive shaft 25, and the bevel gear 30 meshes with a bevel gear 31 fixed on the driven shaft 27. Accordingly, the rotation of the drive shaft 25 is transmitted to the driven shaft 27 via the bevel gears 30 and 31.

  A worm wheel 32 is fixed on the drive shaft 25, and a worm 33 is engaged with the worm wheel 32. The worm 33 is rotatably supported in the support body 12a (specifically, the corner body 15) via a bearing (not shown). A hex hole 34 into which a hex wrench (not shown) as a tool can be inserted is provided at the end of the worm 33. A tool insertion hole 35 (FIG. 1) facing the hexagonal hole 34 is provided on the surface side of the support 12a (corner body 15), and a hex wrench is inserted through the tool insertion hole 35 to rotate the worm 33. It can be operated. When the stretching jig 10 is a screen printing mask plate (metal mask, etc.) stretching jig, the side on which the mask plate is stretched is the back side in FIG. Thus, in the present embodiment (the present invention), the surface side of the support 12a is used (in order to distinguish it from the side surface, both the front and back surfaces are referred to as the front surface).

  Next, as shown in FIGS. 2 to 5, eccentric cams 37 and 38 are provided on the drive shaft 25 and the driven shaft 27, respectively. The cams 37 and 38 act on the corresponding movable bodies 16a and 16b via the abutment plate 40 when the drive shaft 25 and the driven shaft 27 rotate, and the movable bodies 16a and 16b are respectively opposed to the support bodies 12c, Move in a direction away from 12d (FIGS. 4 and 5). Two or more cams 37 and 38 are preferably disposed on the drive shaft 25 and the driven shaft 27, respectively. The cams 37 and 38 are provided on at least both ends on the drive shaft 25 and the driven shaft 27, respectively. In the example shown in FIG. 2, three cams 37 and three cams 38 are provided (the cam 38 on the driven shaft 27 side is not shown in the center cam, and only two cams are shown). By providing a plurality of cams, a force can be applied to the movable bodies 16a and 16b as evenly as possible.

The conditions of the worm gear mechanisms 32 and 33 are set so that the mask plate 19 is stretched at a position where the tool such as a hexagon wrench is rotated 3 to 5 around the axis. Thus, the operability is improved by reducing the number of rotations of the tool.
Although not shown, it shows that the movable bodies 16a and 16b (locking pins 22) have moved to the stretched position of the mask plate 19 on at least one of the movable bodies 16a and 16b and the support bodies 12a and 12b. It is preferable to provide a label. Thereby, the tension position can be accurately grasped, and the operation of the tool can be terminated at the optimum position.

  FIG. 2 shows an arrangement state of the locking pins 22 provided on the movable body 12a. In FIG. 2, the locking pins provided on the movable body 12b are not shown, but are provided in substantially the same arrangement as the locking pins 22 on the movable body 12a. Further, although the illustration of the locking pins 22 provided on the support 12c is also omitted, the locking pins on the support 12c face the locking pins 22 on the opposing movable body 16a so as to have the same arrangement. Is provided. Although the illustration of the locking pins 22 on the support 12d is also omitted, the locking pins on the support 12d are provided in the same arrangement so as to face the locking pins 22 provided on the opposing movable body 16b. ing.

FIG. 6 shows the arrangement of the locking holes 20 provided in the mask plate 19. The locking holes 20 provided in the mask plate 19 are provided in the same arrangement as the arrangement of the locking pins 22 of the tensioning jig 10.
Hereinafter, the arrangement of the locking pins 22 will be described together with the arrangement of the locking holes 20 in FIG.
In the present embodiment, among the locking pins 22, a plurality of locking pins 22a at positions (substantially facing each other) facing the eccentric cams 37 and 38 provided on the drive shaft 25 and the driven shaft 27, respectively. , 22b and 22c are provided so as to be smaller than the intervals between the plurality of locking pins 22 at other positions.
For example, the interval between the locking pins 22a, 22b, and 22c is set to 15.5 mm as shown in the dimensional diagrams of FIGS. 2 and 6, whereas the interval between the other locking pins 22 is 25 mm. Is set to

The arrangement of the locking holes 20 in the mask plate 19 in FIG. 6 is slightly different from the arrangement of the locking pins 22 shown in FIG.
Also in the present embodiment, the basic arrangement of the locking holes 20 (therefore, the locking pins 22 on the tensioning jig 10 side) is the same as that in the above embodiment.
In the present embodiment, at an arbitrary position of the locking hole 20 (and therefore the locking pin 22), the pitch of the locking holes 20 is different from that of the other parts (for example, the engaging hole 20b in FIG. 2). The pitch between the stop holes 20c ′ is 12 mm). In this way, by providing the different pitch portions, the mask plate 19 can be prevented from being erroneously attached to the tension jig 10 in the front / back and left / right directions.

Next, as shown in FIG. 1, a pressing plate 42 that presses the peripheral edge of the mask plate 19 is provided on each of the four supports 12a, 12b, 12c, and 12d.
As shown in FIG. 7, a protrusion 43 is provided at an appropriate position on the surface of each of the supports 12a to 12d, and the mask plate 19 is supported by the protrusion 43 at a slightly inner portion of the outer periphery thereof. Good tension is applied to the inner part of the strip 43. At that time, when the mask plate 19 is made of metal, the outer peripheral portion of the mask plate 19 is lifted, and a state in which the mask plate 19 is not locked to the locking pin 22 occurs.
For this reason, conventionally, by pressing the outer peripheral edges of the four sides of the mask plate 19 with a separate frame-shaped holding jig and maintaining the locked state to the locking pins, the tool is operated to I was doing tension work.

However, as in the prior art, the operation of operating the tool while pressing the outer peripheral edges of the four sides of the mask plate 19 with the pressing jig is very troublesome, and there is a problem in operability. In some cases, it was necessary for a plurality of people to stretch the mask plate.
In this regard, in the present embodiment, the mask plate 19 can be automatically pressed by the press plate 42.
In the present embodiment, as shown by the arrow in FIG. 7, the presser plate 42 is supported on the vertical movement shaft 45 by the shaft pin 44 so as to be rotatable inward and outward of the support frame 14. The base side of the vertical movement shaft 45 is located in the support 12, and a coil spring 47 is disposed between the washer 46 provided at the lower end of the vertical movement shaft 45 and the inner wall surface of the support 12, The shaft 45 is biased downward.

Therefore, the pressing plate 42 generates a pressing force downward at the left and right lying positions in FIG. In this way, in FIG. 7, the pressing plate 42 can press the outer peripheral portion of the mask plate 19 by the biasing force of the spring at the position where it is tilted to the right. In this embodiment, the work of rotating the presser plate 42 is performed manually, but once the mask plate 19 is pressed, the mask plate 19 is applied by the urging force of the coil spring 47 even if the hand is released thereafter. Can be pressed. Therefore, unlike the prior art, it is not necessary to always hold the mask plate 19 with a frame-like pressing jig, and therefore, the mask plate 19 can be easily stretched with a tool.
FIG. 8 shows the upright state of the presser plate 42.
Further, the urging structure of the presser plate 42 is not limited to the above structure.

The screen printing mask plate tensioning jig 10 and the screen printing mask plate 19 in the present embodiment are configured as described above.
The mask plate 19 is stretched as follows.
First, the mask plate 19 is arranged on the support frame 14 so that the locking pin 22 enters the locking hole 20. The mask plate 19 is cut out at four corners. This is because, as shown in FIG. 7, when the mask plate 19 is supported by the protrusion 43 and the outer peripheral portion is bent downward, it is prevented from wrinkling at the corner portion. is there.

Next, as described above, the outer peripheral edge of the mask plate 19 is pressed by the pressing plate 42 so that the locking pin 22 surely enters the locking hole 20.
In this state, a hexagon wrench is inserted into the insertion hole 35 and the hexagon hole 34, the hexagon wrench is turned, and the drive shaft 25 and the driven shaft 27 are rotated by the worm mechanisms 32 and 33. Along with this, the cams 37 and 38 rotate to act on the movable bodies 16a and 16b, and move the movable bodies 16a and 16b, and thus the locking pin 22, in a direction away from the opposing support bodies 12c and 12d. The mask plate 19 can be stretched. In this case, even when the support frame 10 is placed on a desk, for example, the insertion hole 35 faces upward, and the hexagon wrench can be inserted into the insertion hole without being obstructed by the desk. Easy. Further, since the operation with a tool such as a hexagon wrench is only required at one place on the surface side of the support frame 14, the sheet can be easily stretched.

  By confirming that the locking pin 22 has moved to the required position with a sign (not shown), the tensioning operation can be completed. Alternatively, an appropriate stopper mechanism (not shown) is provided between the cams 37 and 38 and the supports 12a and 12b, and the cams 37 and 38 are moved by the stopper mechanism at a position where the mask plate 19 is in a required stretched state. The rotation operation may be stopped so that the tensioning operation can be completed.

In the present embodiment, cams 37 and 38 are applied to the movable members 16a and 16b, the mask plate 19 is pulled via the locking pins 22, and the mask plate 19 is stretched. For this reason, the movable member that causes the cams 37 and 38 to bend slightly bends. According to the inventor's study, it has been found that if the locking pins 22 are provided at equal intervals, the tension from the plurality of locking pins 22 is not evenly applied to the mask 19.
Therefore, in the present embodiment, as described above, a plurality of positions (substantially facing positions) of the locking pin 22 facing the eccentric cams 37 and 38 provided on the drive shaft 25 and the driven shaft 27, respectively. The intervals between the locking pins 22a, 22b, and 22c are set to be smaller than the intervals between the plurality of locking pins 22 at other positions.

  Although a larger force is applied to the plurality of locking pins 22 at positions opposite to the eccentric cams 37 and 38 as a whole than the locking pins 22 of other parts, in this embodiment, the locking pins 22a, Since the interval between 22b and 22c is made smaller than the interval between the locking pins 22 in other parts, the number of the locking pins arranged per unit length of the mask plate 19 increases, and the force at this part is reduced. Distributed. As a result, the force applied to one of the locking pins 22 at this portion is substantially equal to the force applied to one of the locking pins 22 at the other portion, and therefore is applied to the mask plate 19 as a reaction force thereof. The tension becomes almost uniform as a whole, and the mask plate 19 can be stretched without causing distortion in the mask plate 19.

  In the above embodiment, the arrangement of the locking pins 22 on the support members 12c, 12d facing the movable members 16a, 16b is also the same as the arrangement of the locking pins 22 on the movable members 16a, 16b. The arrangement of the locking pins 22 on the support members 12c, 12d side does not necessarily have to be the same as the arrangement of the locking pins 22 on the movable members 16a, 16b, and may be, for example, an evenly spaced arrangement.

  DESCRIPTION OF SYMBOLS 10 Screen printing mask plate tensioning jig, 12, 12a to 12d Support body, 14 Support frame body, 16a, 16b Movable body, 17 Slider, 18 Roller, 19 Mask plate, 20 Lock hole, 22 Lock pin, 25 Drive shaft, 26 bearing, 27 driven shaft, 28 bearing, 30, 31 bevel gear, 32 worm wheel, 33 worm, 34 hexagon hole, 35 insertion hole, 37, 38 cam, 40 holding plate, 42 presser plate, 43 protrusion Strip, 44 shaft pin, 45 vertical shaft, 46 washer, 47 coil spring

Claims (5)

A support frame assembled in a rectangular shape by four supports;
The support frame is moved toward and away from each of the two adjacent support bodies of the four support bodies with respect to each of the opposing support bodies of the other two adjacent support bodies. A movable body supported freely,
A locking pin which is provided on the two movable bodies and the other two adjacent support bodies and enters a locking hole provided at a required interval at each edge of the mask plate to be stretched;
A drive shaft that extends in one of the two adjacent supports and is supported by the support so as to be rotatable about an axis;
A follower that extends in the other support body of the two adjacent support bodies, is supported by the support body so as to be rotatable about an axis, and is linked to the drive shaft via a bevel gear mechanism. A shaft,
The drive shaft and the driven shaft are provided on at least both end sides, respectively, and the drive shaft and the driven shaft rotate about the axis to push the corresponding movable bodies outwardly, An eccentric cam for moving the movable body in a direction away from the opposing support body;
The one end of the drive shaft and the driven shaft is located at one corner of the support frame, and a tool is inserted from the surface side of the support frame to rotate the tool, The drive shaft and the driven shaft driven by the drive shaft are rotated, the eccentric cam moves the movable body in a direction away from each of the opposing support bodies, and the locking pin is locked. A mask printing plate tensioning jig comprising a gear mechanism for tensioning the mask plate by applying a required tension to the mask plate,
Among the locking pins, the intervals between the plurality of locking pins at positions facing the eccentric cams provided on the drive shaft and the driven shaft are larger than the intervals between the plurality of locking pins at other positions. A screen printing mask plate tensioning jig characterized by being provided so as to be smaller.   The plurality of locking pins provided on the other two adjacent support bodies are provided at positions corresponding to the plurality of locking pins provided on the two movable bodies facing each other. 2. The tensioning jig for a screen printing mask plate according to claim 1, wherein:   In the arrangement of the locking pins provided in the tensioning jig, the mask plate has a different pitch part different from the pitch of other parts so that the mask plate is not erroneously attached to the tensioning jig on the front and back sides and in the left-right direction. The stretching jig for a screen printing mask plate according to claim 1 or 2.   4. The screen printing mask plate tensioning jig according to claim 1, wherein the gear mechanism is a worm gear mechanism.   A screen printing mask plate stretched by the screen printing mask plate stretching jig according to any one of claims 1 to 4, wherein each edge has the same arrangement of the locking pins of the stretching jig. A mask plate for screen printing, wherein a locking hole into which the locking pin enters is provided in an array.

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