JP2011152731A - Frame for screen printing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a frame for screen printing which can simply perform gauze set up shortly, can enhance the recyclability of the frame, and can realize the space saving of the working space. <P>SOLUTION: While carrying out the square framework of one pair of vertical frames and horizontal frames which each are composed of two or more frame members, each of the frame members is made to connect with a flexible mechanism, and is formed to approach and to be estranged in each of longitudinal directions, a screen is fixed on the frame in which the framework is carried out, then each of the frame members is estranged in each of the longitudinal directions by the flexible mechanism, and thereby the frame is enlarged to set up the screen. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a frame used for screen printing, and more particularly to a frame for fixing a screen.

  Conventionally, an air cylinder with a clamp has been used to screen an aluminum frame for screen printing. That is, by placing an air cylinder with clamps on the four sides of the aluminum frame, placing the screen on it, holding the aluminum frame and the screen with the four sides sandwiched by the clamp, and pulling it outward with the air cylinder in this state Stretching the screen is done.

  In such tensioning, the screen tension is adjusted by adjusting the air pressure of the air cylinder, the screen is bonded to the aluminum frame with sufficient tension, and the tensioning is performed. (For example, Patent Document 1).

JP 2005-28849 A

  However, since the conventional method as described above uses a bond to bond the screen to the frame, it takes time for the bond to solidify, a bond-specific odor occurs, and it causes contamination. I was doing.

  Furthermore, in order to reuse the frame, it is necessary to peel off the bond, and it is necessary to immerse the frame in MEK such as a lacquer thinner to peel off the bond, which requires complicated work.

  Moreover, since a space for arranging the air cylinder is also required, the working space is greatly restricted.

  Therefore, an object of the present invention is to provide a frame for screen printing that can be easily stretched in a short time, can improve the reusability of the frame, and can save the work space.

  The present invention has been made to solve the above-described problems.

  The features of the invention described in each claim will be described below.

(Claim 1)
The invention according to claim 1 is characterized by the following.

  That is, the frame for screen printing according to claim 1 is configured such that a pair of vertical and horizontal frames each divided from a plurality of frame members are rectangularly framed, and each frame member is connected to an expansion / contraction mechanism. The frame member is formed so as to be able to approach and separate in the longitudinal direction, the screen is fixed on the framed frame, and the frame members are separated in the longitudinal direction by the expansion and contraction mechanism. The screen can be stretched so that the screen can be stretched, and the telescopic mechanism is provided with an operating portion. By operating the operating portion, all the vertical frames and the horizontal frames are interlocked and separated in the longitudinal direction. Features.

(Claim 2)
The invention described in claim 2 is characterized by the following in addition to the features of the invention described in claim 1 described above.

  That is, the expansion / contraction mechanism is configured by providing a shaft-like member that can be expanded and contracted while rotating inside the frame.

(Claim 3)
The invention described in claim 3 is characterized by the following in addition to the features of the invention described in claim 1 or 2.

  That is, the fixing of the screen onto the frame body is performed by wrapping and holding the screen by fitting a pressing member into a groove provided in the frame member.

(Claim 4)
The invention described in claim 4 is characterized by the following in addition to the features of the invention described in claim 3 described above.

  That is, the groove portion formed on two opposite sides of the four sides of the frame is formed over the entire length of the two sides.

  The present invention is as described above, and since the function of the tensioning device is provided in the frame itself, the work space can be saved.

  In addition, since the tension of the screen can be adjusted while the screen is held on the frame, it is not necessary to fix using a bond after the tension is adjusted. For this reason, avoid problems such as when it takes time to use the bond, for example, it takes a long time for the adhesive to solidify, generates an odor peculiar to the adhesive, or causes dirt. Can do. In addition, it is not necessary to remove the bond when the frame is reused, and the frame can be reused simply by removing the old screen and attaching a new screen. Therefore, the frame can be reused very easily.

  Furthermore, even when the printing accuracy is deteriorated due to the looseness of the screen tension, it is not necessary to replace the screen as in the prior art, and the screen tension can be adjusted only by extending each side of the frame. .

  In addition, since the telescopic mechanism is provided with an operation unit, and the operation unit is operated, all the vertical and horizontal frames are interlocked and separated in the longitudinal direction, so there is no need to individually adjust the tension on each side. It is possible to easily perform the tensioning by a single operation.

It is a figure explaining embodiment of this invention, Comprising: It is a plane perspective view of the frame for screen printing when the magnitude | size of a frame is the maximum. It is a figure explaining embodiment of this invention, Comprising: It is a plane perspective view of the frame for screen printing when the magnitude | size of a frame is the minimum. It is a figure explaining embodiment of this invention, Comprising: It is an enlarged plan view of the connection part of a shaft-shaped member. It is a figure explaining embodiment of this invention, Comprising: It is a side view of the frame for screen printing when the magnitude | size of a frame is the maximum. It is a figure explaining embodiment of this invention, Comprising: It is A-A 'sectional drawing of FIG. It is a figure explaining embodiment of this invention, Comprising: It is a side view of a frame member. It is a figure explaining embodiment of this invention, Comprising: It is a top view of the frame for screen printing which shows the state before performing tension adjustment. It is a figure explaining embodiment of this invention, Comprising: It is (a) perspective view and (b) sectional drawing which show a mode that a screen is stretched | hanged to the frame member. It is a figure explaining embodiment of this invention, Comprising: It is a top view of the frame for screen printing which shows the state after performing tension adjustment.

  FIG. 1 is a plan perspective view of a screen printing frame 1 according to an embodiment of the present invention, in which the size of the frame 2 is maximum. FIG. 2 is a plan perspective view of the screen printing frame 1 according to the embodiment of the present invention, in which the size of the frame body 2 is the minimum. As described above, the screen printing frame 1 according to the present embodiment allows the length of each side to be expanded and contracted, whereby the tension of the screen 16 stretched on the frame 2 can be adjusted.

  This will be described in detail below.

(Frame 2)
As shown in FIG. 1, the frame 2 is a rectangular frame formed by connecting a pair of vertical frames 18 and horizontal frames 19 with connecting metal fittings 6. As will be described later, an expansion / contraction mechanism is provided inside each side of the frame 2. These expansion and contraction mechanisms are constituted by shaft-like members that are rotatably supported inside the vertical frame 18 and the horizontal frame 19, respectively, and each shaft-like member is attached to the frame member 3 and the connecting bracket 6 near both ends thereof. It is rotatably supported.

  As shown in FIG. 3, the shaft-like members constituting the expansion / contraction mechanism are engaged with other shaft-like members at the four corners of the frame 2 by bevel gears 13 provided in the vicinity of both ends. Yes. By engaging in this way, all the shaft-shaped members are formed to rotate when a square hole handle 11 described later is operated. The rotation operation when operating the square hole handle 11 will be described in detail later.

(Frame member 3)
The frame member 3 is an aluminum member that forms the vertical frame 18 and the horizontal frame 19 of the frame 2. As shown in FIGS. 1 and 2, two frame members are provided for each vertical frame 18 and the horizontal frame 19. 3 is used. That is, as shown in FIG. 2, when the frame body 2 is minimized, the two frame members 3 forming one side of the frame body 2 are in contact with each other, and one continuous columnar shape is formed. It is formed to become. As shown in FIG. 1, when the frame body 2 is maximized, a gap is created between the two frame members 3 forming one side of the frame body 2. In this way, the two frame members 3 are formed so as to be able to approach and separate in the longitudinal direction while sliding on the coupling holder 4, whereby each side of the frame body 2 expands and contracts. ing.

  As shown in FIGS. 5 and 6, a groove 14 is formed in the axial direction on the surface of each frame member 3 on the side where the screen 16 is placed. This groove portion 14 is for holding the screen 16, and the screen 17 can be wound and held by the plate 17 by inserting a plate 17 (to be described later) into the groove portion 14 with the screen 16 being placed in the groove portion 14. ing.

  Then, by operating the square hole handle 11 with the screen 16 held by the frame member 3, the tension of the screen 16 as described later can be adjusted.

(Extension mechanism)
The expansion / contraction mechanism is configured by a shaft-like member that is rotatably supported inside each side of the frame body 2 and is provided inside each of the vertical frame 18 and the horizontal frame 19 as described above. .

  That is, as shown in FIG. 1, the expansion / contraction mechanism includes a shaft-like member in which a connecting shaft 7 and a screw shaft 8 are connected by a coupling 5, and the shaft-like member expands and contracts while rotating, thereby This is for enlarging or reducing the body 2.

(Coupling 5)
The coupling 5 is for connecting the connecting shaft 7 and the screw shaft 8 to transmit the rotational force to each other. As shown in FIG. 5, a coupling holder 4 made of MC nylon is fitted inside the frame member 3, and the coupling 5 is rotatably inserted into a round hole inside the coupling holder 4. is there. The coupling 5 is a cylindrical member having a hexagonal cross section. The coupling shaft 7 and the screw are inserted by inserting the connecting shaft 7 from one side of the hollow portion and the screw shaft 8 from the other side. The shaft 8 is connected. At this time, as shown in FIG. 5, the shafts on the insertion end side of the connecting shaft 7 and the screw shaft 8 have a hexagonal cross section so as to be fitted to the inner peripheral surface of the coupling 5. For this reason, by being connected by the coupling 5, when the connecting shaft 7 rotates, the screw shaft 8 rotates together.

(Connection shaft 7)
The connecting shaft 7 is a rod-like member that rotates in the circumferential direction when the square hole handle 11 is operated. As shown in FIG. 1, a bevel gear 13 is provided at the end of the connecting shaft 7 closer to the square hole handle 11, whereby another shaft-like member (screw shaft 8) adjacent at the end is provided. It is formed to be engaged with the bevel gear 13. On the other hand, the end of the connecting shaft 7 on the side far from the square hole handle 11 has a hexagonal cross section, and is inserted into the coupling 5 and fitted into the hollow inner peripheral surface of the coupling 5.

(Screw shaft 8)
The screw shaft 8 is a rod-like member that rotates in the circumferential direction when the square hole handle 11 is operated. As shown in FIG. 1, a bevel gear 13 is provided at the end of the connecting shaft 7 on the side far from the square hole handle 11, whereby another shaft-like member adjacent to the end (the connecting shaft 7). It is formed to be engaged with the bevel gear 13. On the other hand, the end of the connecting shaft 7 on the side closer to the square hole handle 11 has a hexagonal cross section, and is inserted into the coupling 5 and fitted into the hollow inner peripheral surface of the coupling 5.

  Although not shown, a male screw is provided on the outer peripheral surface near the end of the screw shaft 8 on the side inserted into the coupling 5, and a screw nut 9 is fitted into the male screw. That is, the inner peripheral surface of the screw nut 9 is provided with a female screw that is screwed with a male screw on the outer peripheral surface of the screw shaft 8, whereby the screw nut 9 and the screw shaft 8 are relatively rotated in the circumferential direction. Sometimes, the screw nut 9 is formed to move relatively in the axial direction of the screw shaft 8.

(Operation of each telescopic mechanism)
As already explained, each expansion / contraction mechanism is composed of a shaft-like member in which the connecting shaft 7 and the screw shaft 8 are connected by the coupling 5, and this shaft-like member can be extended and contracted by rotating. It has become.

  Hereinafter, the operation of the telescopic mechanism will be described with reference to FIG.

  FIG. 4 is a side view (partially omitted) of the screen printing frame 1 when the size of the frame 2 is maximum. As shown in FIG. 4, although both the connecting shaft 7 and the screw shaft 8 are inserted into the coupling 5, there is a space S between them, and there is a gap. Yes.

  When the connecting shaft 7 rotates in this state, the rotational force is transmitted to the screw shaft 8 through the coupling 5, and the connecting shaft 7 and the screw shaft 8 rotate in conjunction with each other. At this time, since the screw nut 9 is held by the coupling holder 4 fixed to the frame member 3, the screw nut 9 does not rotate even when the screw shaft 8 rotates. Therefore, when the screw shaft 8 rotates, the relative position between the screw shaft 8 and the screw nut 9 in the axial direction of the screw shaft 8 is moved by the action of the screws provided on the screw shaft 8 and the screw nut 9. Will do.

  Specifically, in FIG. 4, when the screw provided on the screw shaft 8 and the screw nut 9 is a right-hand screw, when the screw shaft 8 rotates to the right, the screw nut 9 is relatively moved in the right direction. When it moves and the screw shaft 8 rotates counterclockwise, the screw nut 9 moves relatively to the left.

  Thus, when the relative position of the screw nut 9 in the axial direction of the screw shaft 8 moves, the shaft on the coupling 5 insertion end side of the screw shaft 8 moves forward and backward in the coupling 5. The length of the shaped member can be adjusted. In other words, the length of the shaft-shaped member is adjusted by adjusting the width of the space S in the coupling 5. For example, when the size of the frame 2 is minimum, as shown in FIG. 2, there is no space S between the connecting shaft 7 and the screw shaft 8 in the coupling 5, and one end surface of the connecting shaft 7. And one end face of the screw shaft 8 are in contact with each other in the coupling 5.

  Thus, in this embodiment, the shaft-shaped member which can be expanded and contracted while rotating is provided, and thereby the expansion and contraction for moving the frame member 3 constituting each side of the frame body 2 in the longitudinal direction so as to be spaced apart. The mechanism is configured.

That is, as shown in FIG. 4, the connecting shaft 7 and the screw shaft 8 are connected to different frame members 3, whereby the frame members 3 are separated from each other when the shaft-shaped member is extended. When the shaft member is contracted, these frame members 3 move in the approaching direction. (Square hole handle 11)
As shown in FIG. 1, the square hole handle 11 is provided on one shaft-shaped member A among the four shaft-shaped members constituting the expansion / contraction mechanism. Specifically, one end of the predetermined shaft member A protrudes from the frame 2, and a square hole handle 11 is provided at the protruding portion. This square hole handle 11 rotates the shaft-shaped member A so that all the other shaft-shaped members are rotated by the rotational force, and all the vertical frames 18 and the horizontal frames 19 are interlocked with one handle operation. Thus, it is possible to approach and separate in the longitudinal direction.

(Operation when operating the square hole handle 11)
Hereinafter, the operation when the square hole handle 11 is operated will be described.

  Here, as described above, the screw shaft 8 and the screw nut 9 are engaged by the screw mechanism in the respective shaft-like members constituting the expansion / contraction mechanism. In the present embodiment, this screw direction is (1) a right-hand thread for the shaft-like member A provided with the square-hole handle 11, and (2) a shaft connected to the shaft-like member A. 11 is a right-hand screw for the shaft-like member B connected to the shaft-like member A on the opposite side, and (3) a shaft connected to the shaft-like member A, and the shaft-like member A on the square hole handle 11 side. The shaft-like member D to be connected is a left-hand screw, and (4) the shaft-like member B and the shaft-like member C connected to the shaft-like member D are left-handed screws.

  For this reason, when the square hole handle 11 is rotated to the right, the screw shaft A ′ in the shaft-shaped member A rotates to the right and acts to increase the length of the shaft-shaped member.

  The rotation of the shaft-shaped member A described above is transmitted to the shaft-shaped member B, the shaft-shaped member C, and the shaft-shaped member D through the bevel gear 13. Here, as shown in FIG. 1, in this embodiment, the shaft-shaped member B is provided with a bevel gear 13 so as to rotate in the same direction as the shaft-shaped member A, and the shaft-shaped member C and the shaft-shaped member D are Since the bevel gear 13 is provided to rotate in the opposite direction to the shaft-shaped member A, when the shaft-shaped member A rotates to the right, the shaft-shaped member B rotates to the right, and the shaft-shaped member C and the shaft-shaped member The member D rotates counterclockwise.

  As described above, since the shaft-shaped member B is a right-hand thread, the shaft member B acts to increase its length by rotating to the right in the same manner as the shaft-shaped member A.

  Since the shaft-like member C and the shaft-like member D are also left-handed, the left-hand rotation acts like the shaft-like member A so as to increase its length.

  As described above, in the present embodiment, by rotating the square hole handle 11 to the right, the length of all the shaft-like members is increased, thereby increasing the size of the frame body 2. It is possible.

  On the other hand, when the square hole handle 11 is rotated counterclockwise, the screw shaft A ′ in the shaft-like member A rotates counterclockwise and acts so that its length is shortened. Then, as in the case where the square hole handle 11 is rotated to the right, the shaft members B to D operate in the same manner as the shaft member A, that is, the shaft members B to D have the length. Acts to shorten.

  As described above, in this embodiment, by rotating the square hole handle 11 counterclockwise, the lengths of all the shaft-like members are shortened, thereby reducing the size of the frame body 2. It is possible.

  As described above, in the screen printing frame 1 according to the present embodiment, the size of the frame body 2 can be adjusted by operating the square hole handle 11.

(How to use frame 1 for screen printing)
A specific method of using the screen printing frame 1 according to the present embodiment will be described with reference to FIGS.

  First, FIG. 7 is a plan view showing a state of the screen printing frame 1 before tension adjustment. As shown in FIG. 7, the screen 16 is first placed on the screen printing frame 1 with the size of the frame 2 being minimized.

  Next, the screen 16 is fixed to the frame 2 using the groove 14 of the frame member 3. That is, as shown in FIG. 8, the groove portion 14 is formed so that the plate 16 can be inserted from the end opening, and when the plate 17 is inserted into the groove portion 14, the inner surface of the groove portion 14 and the plate 17 16 is to be caught and held.

  As shown in FIG. 7, the frame member 3 constituting the opposing horizontal frame 19 has the groove 14 formed up to the outer edge of the frame 3, while the frame member 3 constituting the opposing vertical frame 18 is Since the frame member 3 constituting the horizontal frame 19 is joined to the end portion 14, the end of the groove portion 14 is blocked by the frame member 3 constituting the horizontal frame 19. For this reason, at the end of the groove portion 14 provided in the frame member 3 constituting the vertical frame 18, an expanded portion 15 that is opened larger than the width of the plate 17 is provided, and this expanded portion 15 is provided. Accordingly, the plate 17 can be inserted into the groove portion 14.

  Then, after the holding of the screen 16 by inserting the plate 17 is completed in all of the vertical frame 18 and the horizontal frame 19, the square hole handle 11 is then rotated to enlarge the size of the frame body 2. Then, tension is applied to the screen 16. That is, as shown in FIG. 9, by rotating the square hole handle 11 to the right, each axial member is rotated and each side of the frame body 2 is extended. Thus, when each side of the frame 2 is extended, the screen 16 is pulled outward.

  When sufficient tension is applied to the screen 16, the fixing nut 12 is used to suppress the rotation of each shaft-like member, and the screen 16 tension is completed. At this time, excess portions such as the screen 16 that protrudes from the frame 2 may be cut.

  If the printing accuracy deteriorates due to loosening of the tension of the screen 16, remove the fixing nut 12 once, rotate the square hole handle 11 to adjust the tension of the screen 16, and fix it again with the fixing nut 12. In this case, it is possible to eliminate the looseness without changing the screen 16.

  As described above, according to the present embodiment, since the function of the tension device is provided in the frame itself, a significant space saving can be achieved as compared with the conventional case.

  In addition, since the screen 16 can be fixed without using a bond, there are problems with using the bond, such as the adhesive takes time to solidify, an odor peculiar to the adhesive is generated, This will not cause any problems.

  Further, since the frame can be reused simply by removing the old screen 16 and attaching a new screen 16, the frame can be reused very easily.

  Further, as shown in FIG. 7, the frame member 3 constituting the opposing horizontal frame 19 has the groove portion 14 formed up to the outer edge of the frame body 3, so that the screen 16 is pulled also at the corner of the frame body 2. Thus, even when a strong tension is applied to the screen by strongly stretching the screen, no slack or wrinkles are generated at the four corners of the frame 2. In addition, since the four sides are extended at the same time, and the amount of extension at that time is set to be the same, the screen is evenly tensioned, and no slack or wrinkle is generated.

  In the above-described embodiment, the vertical frame 18 and the horizontal frame 19 are all expanded or contracted in conjunction with each other. However, the present invention is not limited to this, and an operation unit for individually extending or contracting is provided. The length may be adjustable.

1 frame for screen printing 2 frame 3 frame member 4 coupling holder 5 coupling (extension mechanism)
6 Connecting bracket 7 Connecting shaft (extension mechanism)
8 Screw shaft (extension mechanism)
9 Screw nut
10 colors
11 Square hole handle (control unit)
12 Fixing nut
13 Bevel gear
14 Groove
15 Expansion section
16 screen
17 Plate (holding material)
18 Vertical frame
19 Horizontal frame

Claims (4)

A pair of vertical and horizontal frames each divided from a plurality of frame members are squarely framed, and each frame member is connected to an expansion / contraction mechanism so as to be able to approach and separate in the longitudinal direction.
After fixing the screen on the framed frame, the frame can be stretched by extending the frame by separating the frame members in the longitudinal direction by the expansion and contraction mechanism.
A screen printing frame characterized in that an operating portion is provided in the expansion / contraction mechanism, and by operating the operating portion, all the vertical frames and the horizontal frames are interlocked and separated in the longitudinal direction.   The frame for screen printing according to claim 1, wherein the expansion / contraction mechanism is configured by providing a shaft-shaped member that can expand and contract while rotating inside the frame.   The screen according to claim 1 or 2, wherein the fixing of the screen onto the frame body is performed by entraining and holding the screen by fitting a pressing member into a groove provided in the frame member. Print frame.   4. The screen printing frame according to claim 3, wherein the groove portions formed on two opposing sides of the four sides of the frame are formed over the entire length of the two sides. 5.

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