JP2008259969A - Masking tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a masking tool capable of attaching/detaching an attaching part to/from a non-coating portion by using the metallic attaching part, and performing an accurate masking. <P>SOLUTION: In the masking tool 1 having the attaching part 3 projected from a base part 2 having an abutting surface 21 following the non-coating portion 51 of a motor cover 5 to be coated and inserted into a screw hole 52 in the non-coating portion 51 position, the attaching part 3 comprises an attaching part main body 31 attached to the base part freely detachably and a metal made spring body 32 projected from the attaching part main body 31 and the spring body 32 is formed by assembling a spring element 321 formed by folding a wire and having an elliptic shape in the side view. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a masking jig to be mounted on a portion where a coating object is not to be painted (non-painted portion).

  Masking is performed on the non-coating part for the purpose of clearly defining the boundary between the part to be painted (painted part) and the part not to be painted (non-coating part). For simple masking, masking tape is often applied, but if the non-painted part has a complicated shape in a wide range, or conversely a part surrounding the screw hole, etc., the size of the non-painted part is large. A masking jig adapted to the height or shape is used.

  Patent Document 1 discloses a masking jig corresponding to a case where the non-coating region is in a wide range. The masking jig includes a mounting portion (shield) that fits from a plate-like base portion (template 4) having an abutting surface following the non-coating region into a projecting portion (18, 19) in the non-coating region. The piece 8) protrudes. The mounting portion forms a shield tube (1) that can be fitted to the projecting portions (18, 19), and is provided with an upper plate (2) with a hook on the upper portion of the shield tube, and is further provided at substantially the center of the upper plate. It is made of resin with a vent hole (2b) that penetrates the bottom of the inner sinus (2a).

  Patent Document 2 discloses a masking jig corresponding to a case where the non-coating part is a screw hole. The masking jig is formed by bending the side plate of a thin steel plate in which the side plate (2) protrudes radially from the top (1). The masking jig disclosed in Patent Document 2 has a state in which the side plate is pushed and expanded in the radial direction of the screw hole to be in pressure contact with the inner surface of the screw hole and is attached to the screw hole with little friction with respect to the screw hole. It can be easily held.

JP2003-062497 Japanese Utility Model Publication No. 40-012145

  Many masking jigs currently fit or insert a resin or rubber mounting part into a convex part (protruding part of Patent Document 1) or a concave part (screw hole of Patent Document 2) existing in a non-coating region. It is a configuration. The masking jig having a resin or rubber mounting portion can be appropriately attached to and detached from the non-coating region. However, the mounting part made of resin or rubber has a large friction with the convex part or concave part of the non-painted part, and it is difficult to fit, insert or remove the convex part or concave part, and it takes time to attach and detach the non-painted part. was there. In recent years, since it has been required to shorten the time required for painting an object to be coated, a masking jig that takes time to attach and detach is not preferable.

  Here, the masking jig of Patent Document 2 is made of metal, and has an advantage that it can be easily inserted into the concave portion of the non-coating region as compared with Patent Document 1 and other conventional masking jigs. From this, for example, it is conceivable to use the masking jig of Patent Document 2 as the mounting part of Patent Document 1. However, the masking jig of Patent Document 2 has a structure in which each of a large number of side plates cantilevered at the top of which the size and shape are fixed is a leaf spring, and the side plate is placed on the inner surface of a specific screw hole inserted. There is a concern about the following problems because they are pressed from the inside in the radial direction.

  First, in the masking jig of Patent Document 2, the size of the screw hole to be inserted must be larger than the size of the top, and if the screw hole is too large than the top, the side plate is pressed from the inside in the radial direction. I can't do that. That is, the masking jig of Patent Document 2 has a problem that the applied screw hole is practically specified depending on the size of the top determined in accordance with the screw hole, and the versatility is poor. This is a problem based on a configuration in which the side plate cantilevered at the top is used as a leaf spring and the side plate is pressed against the inner surface of the screw hole from the inside in the radial direction.

  In addition, since the plate spring is configured as described above, when the masking jig of Patent Document 2 is attached to the base portion as the mounting portion of Patent Document 1, the upper edge of the side plate is restrained by the base portion. There is a problem that the side plate does not work as a leaf spring. From this, it is possible to attach the upper edge of the side plate to the base part with flexibility, but it is difficult to fix the position of the mounting part (masking jig of Patent Document 2) on the base part, and multiple mountings to the base part When providing a part, there exists a possibility that each mounting part cannot be quickly attached or detached to the recessed part of a non-coating site | part.

  In addition, the masking jig of Patent Document 2 uses a side plate as a cantilever-supported leaf spring, so that the upper edge of the side plate is in a free state, so that a gap is formed between adjacent side plates, It is considered unpreferable as a recent masking jig that cannot completely close screw holes and requires accurate masking. Therefore, while the mounting part of the masking jig of Patent Document 1 is made of metal, the problem assumed by using the masking jig of Patent Document 2 as the mounting part is solved, and quick attachment / detachment with respect to the non-coating part can be performed. In order to develop a masking jig that enables accurate masking while ensuring it, it was studied.

  As a result of examination, in a masking jig comprising a base portion having an abutting surface that follows the non-coating part of the object to be coated and a mounting part that is inserted into a recess in the non-coating part, the mounting part is attached to the base part A masking unit comprising a mounting part main body and a metal spring body projecting from the mounting part main body, wherein the spring body is formed of a spring element formed by bending a long metal material to form an arc portion protruding radially outward. A jig was developed. The mounting part may fix the mounting part main body to the base part and make it non-removable, but as will be described later, if the mounting main body is detachable from the base part so that it can be used as a single masking jig Good.

  The masking jig of the present invention includes a metal spring body projecting from a mounting portion attached to a base portion, inserted into a recess in a non-painted part, for example, a screw hole, and a radially arcuate convex portion of the spring body. Is pressed against the inner surface of the screw hole. Since the spring body only needs to have one arc portion that presses against the inner surface of the recess from the radially inner side, the spring body may be composed of only one spring element. Therefore, it is desirable to use a plurality of spring elements. The long metal material forming the spring element means a metal material extending in one direction, for example, a linear metal material such as a wire or a plate metal material such as a metal plate.

  The base portion is configured in the same manner as conventionally known various masking jigs. That is, for example, similar to the base portion of Patent Document 1, it is configured as a resin or metal plate or block having a contact surface having a shape corresponding to a non-coating region. Here, in order to easily attach and detach the masking jig to / from the non-coating part, it is preferable to provide a handle on the base part or to connect the base part to a robot arm or the like that assists automation. The mounting portion is attached to the base portion by the mounting portion main body in a state in which the spring body protrudes from the contact surface of the base portion according to the concave portion of the non-coating region. The position of the mounting portion to be attached to the base portion is made to coincide with the position of the concave portion of the non-coating region, and the number of the mounting portions is appropriately determined to the extent that the mounting state of the masking jig is maintained within the range of the number of the concave portions or less. To do.

  The mounting portion assembles a plurality of spring elements formed by bending a long metal material into an elliptical shape in a side view so that the loop surfaces of the spring elements intersect in a horizontal plane to form a spring body. Each spring element has a long axis aligned in the direction in which the spring body protrudes from the mounting portion, and utilizes a pair of arc portions parallel to the long axis. Here, “the loop surface of each spring element intersects in a horizontal plane” means that a plane including a pair of arc portions in a spring element formed by bending an ellipse in a side view is a loop surface, and the loop surface of each spring element In the horizontal plane, and the spring body is constructed by assembling the crossed spring elements. For example, the loop surface has a cross shape in the horizontal section of the spring body assembled with two spring elements.

  The spring element having an elliptical shape in a side view is not a completely closed ellipse, but has an end portion because it is formed by bending a long metal material. The end is bent to form a flange, and the hook is hooked or inserted into a step or insertion hole provided in the mounting hole of the mounting portion main body, and each spring element may be used as a part to be attached to the mounting main body. . In this case, since the end portion is hidden by the mounting portion main body, each spring element appears to be a perfect ellipse in appearance. The spring body is elastically deformed by crushing a pair of arc portions in each spring element inward in the radial direction, and the restoring force accompanying the elastic deformation causes the pair of arc portions in each spring element to be recessed from the inside in the radial direction. Press against the inside.

  Further, the mounting portion is formed by assembling a plurality of spring elements formed by bending a long metal material into an arc shape when viewed from the side so that the arc portion of each spring element protrudes outward in the radial direction. Good. The side-view arc-shaped spring element has a structure in which the above-described side-view elliptical spring element is halved along the major axis. When combining multiple spring elements, if the lower end of each spring element is abutted as it is, the spring element may be twisted due to the degree of abutment of each lower end. The part may be formed. Moreover, the upper end part of each spring element is good to utilize as a site | part attached to a mounting body by inserting in the mounting hole provided in the mounting body, for example, and crimping. The spring body is elastically deformed by crushing the arc part of each spring element inward in the radial direction, and the arc part of each spring element is pushed from the radially inward side toward the inner surface of the recess by the restoring force accompanying the elastic deformation. Hit it.

  In the masking jig of the present invention, the mounting part detached from the base part can be used as a single masking jig by making the mounting part detachable from the base part. The mounting part that is detachable from the base part has a structure in which the screw part protrudes from the opposite side of the spring body that protrudes from the mounting part main body, and the base part engages the mounting part main body inserted from the abutment surface side. A screw hole having a step and having a fitting hole that penetrates the screw part on the opposite side of the contact surface, fitting the mounting portion main body into the fitting hole, and protruding from the opposite side of the contact surface. Tighten the nut to fix the mounting part to the base part. The mounting portion used as a single masking jig is a portion corresponding to the base portion of the mounting portion, and can be easily inserted into a recess in a non-painted portion, for example, a screw hole, with a screw portion.

  The masking jig of this invention implement | achieves easy attachment or detachment with respect to the said non-coating site | part by inserting a metal spring body into the recessed part of a non-coating site | part. Here, the spring body in the present invention is not a cantilever-supported plate spring structure as found in Patent Document 2, but is a spring element formed by bending a long metal material, specifically a linear metal such as a wire. Side-view elliptical spring elements formed by bending materials and side-view arc-shaped spring elements formed by bending plate-like metal materials such as metal plates are assembled. Since it is elastically deformed and pressed against the inner surface of the concave portion of the non-coating region, it can correspond to concave portions having different sizes within the range where the arc portion is elastically deformed, and has an advantage of high versatility.

  Further, since the spring body elastically deforms the arc portion of the spring element, the upper end portion can be fixed and attached to the mounting portion main body, which occurs when the masking jig found in Patent Document 2 is used as the mounting portion. There is no restriction of the spring element (leaf spring). Since the mounting portion main body is made detachable from the base portion, if necessary, only the mounting portion is removed from the base portion, and the convenience that the mounting portion can be used as a single masking jig is realized. As described above, the masking jig of the present invention has an effect of realizing versatility and convenience that cannot be obtained only by combining the masking jig of Patent Document 1 and the masking jig of Patent Document 2.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view of an example of a masking jig 1 to which the present invention is applied as viewed from above, FIG. 2 is a perspective view of the masking jig 1 of this example as viewed from below, and FIG. 3 is a masking jig 1 of this example. FIG. 4 is an enlarged perspective view showing the mounting portion 3 of this example, FIG. 5 is a partially broken enlarged side view showing the mounting portion 3 of this example, and FIG. 6 is another example of the mounting portion 4. FIG. 7 is a perspective view showing a partially broken enlarged side view showing the masking jig 1 of this example before the masking jig 1 is mounted on the non-painted part 51, and FIG. FIG. 9 is a perspective view corresponding to FIG. 7 showing a state after the masking jig 1 of this example is mounted on the non-coating part 51, and FIG. 10 is a non-coating part 51 of the masking jig 1 of this example. 8 is an enlarged cross-sectional view corresponding to FIG. 8 showing the state after the attachment to FIG. 11, and FIG. Position is 8 corresponds partially enlarged cross-sectional view showing the post attachment for 51, 12 is a 7 corresponding perspective view showing a case of using a mounting site 3 alone.

  As shown in FIGS. 1 to 3, the masking jig 1 of this example attaches mounting parts 3 to the four corners of a base part 2 made of a resin plate having a square shape in plan view, and makes contact surfaces 21 of the base part 2. The spring body 32 protrudes from the lower surface in FIGS. 1 and 3 and the upper surface in FIG. In this example, a handle 22 is provided on the base portion 2 in order to help the masking jig 1 to be attached to and detached from the non-coating region 51. As will be described later (see FIG. 7 below), the base portion 2 of this example has a non-painted portion 51 as the non-painted portion 51 because the upper surface of the square of the motor cover 5 to be painted is a non-painted portion 51. It is a resin plate material that is large and similar in plan view. However, if the non-painted part has a complicated structure, the shape of the base part that requires a contact surface that follows the non-painted part also becomes complicated, and the position or number of mounting parts to be attached to the base part is changed as appropriate. The

  The base portion 2 is provided with fitting holes 23 having annular steps 231 in the middle at the four corners, and the fitting portions 3 are attached to the respective fitting holes 23. The mounting portion 3 is inserted in the order of the screw portion 313 and the mounting portion main body 31 from the contact surface 21 side of the fitting hole 23, and the mounting portion 3 is inserted into the mounting step 231 when the screw portion 313 protrudes from the opposite side of the contact surface 21. The main body 31 is latched, and the nut 31 is fastened to the protruding screw portion 313 to fix it to the base portion 2. As the masking jig 1, the contact surface 21 of the base portion 2 needs to be in close contact with the non-coating region 51, so that the shape of the fitting hole 23 up to the step 23 is set so that the mounting portion main body 31 does not protrude from the fitting hole 23. The mounting portion main body 31 has the same cylindrical shape. As a result, the mounting portion main body 31 is completely fitted into the fitting hole 23, and only the spring body 32 protrudes from the contact surface 21.

  As shown in FIGS. 4 and 5, the spring body 32 is composed of an elliptical spring element 321 formed by bending a wire, and a loop surface including the arc portion 322 of each spring element 321 is orthogonal in a horizontal plane. Assembled in a relationship Each spring element 321 is provided with a pair of flanges 323 by bending the upper end, and the both flanges 323 are projected from the mounting holes 311 provided on the lower surface of the mounting body 31 and mounted from the inner surface of the mounting holes 311. Each flange part 323 is inserted into the insertion hole 312 that penetrates toward the outer surface of the part main body 31, and is attached to the mounting part main body 31. In this example, since the spring elements 321 are orthogonal to each other, the insertion holes 312 corresponding to the other spring elements 321 corresponding to the insertion holes 312 corresponding to the one spring element 321 are the same as the outer diameter of the wire. It is provided at a high position (see FIG. 5).

  The spring body 32 elastically deforms each arc portion 322 of the spring element 321, and presses the arc portion 322 against the inner surface of the screw hole 52 of the non-painted portion 51 from the inside in the radial direction (see FIG. 10 described later). At this time, the flange portion 323 moves in the direction of being pulled out from the insertion hole 312. However, since the movement amount due to the elastic deformation of the arc portion 322 is small, the length of the flange portion 323 and the insertion hole 312 is sufficient. The flange part 323 does not come out of the insertion hole 312. However, if each spring element 321 is left in a completely free state, there is no guarantee that both flange portions 323 will come out of the respective insertion holes 312 when elastically deformed so that the arc portions 322 intersect. From this, it is preferable to fix at least one of the flange portions 323 to the insertion hole 312. As the fixing means, conventionally known welding, adhesion, caulking, or the like can be used.

  Instead of this example, as seen in FIG. 6, the spring element 421 having a circular arc when viewed from the side is formed by bending a metal plate so that the arc portion 422 of each spring element 421 is convex outward in the radial direction. Another mounting portion 4 assembled into a spring body 42 can be used for the masking jig 1. The mounting portion 4 of another example is provided with a mounting hole 411 provided on the lower surface of the solid mounting portion main body 41, and the upper end portion 423 of each spring element 421 is inserted into each mounting hole 411 and attached by caulking, and the spring body 42 is attached. Configure. Each spring element 421 abuts a butted end portion 424 formed by folding the lower end portion of the arc portion 422 upward. As a result, each spring element 421 is elastically deformed between the upper end portion 423 held by the mounting portion main body 41 and the butted end portion 424, and the arc portion 422 is elastically deformed to the inner surface of the concave portion into which the spring body 42 is inserted. The arc portion 422 is pressed from the inside in the direction. As in the above example (see FIGS. 1 to 6), the mounting portion 4 of this other example has a screw portion 413 protruding from the mounting portion main body 41, and the mounting portion main body 1 is inserted into the fitting hole 23 provided in the base portion 2. And the nut 414 is fastened to the protruding screw part 413 to attach to the base part 2 (see FIG. 11 described later).

  As shown in FIGS. 7 and 8, the masking jig 1 of this example is configured so that the spring body 32 of the mounting portion 2 protruding from the contact surface 21 of the base portion 2 is not attached to the motor cover 5 (the object to be coated). The base part 2 is lowered to the non-coating part 51 from above and attached to the screw hole 52 (recessed part) provided in the painting part 51. In the masking jig 1 of the present invention, the spring body 32 of the mounting portion 3 to be inserted into the screw hole 52 is made of metal, and the portion that contacts the screw hole 52 is an arc of each spring element 321 constituting the spring body 32. Only part of part 322. For this reason, the friction of the spring body 32 with respect to the screw hole 52 is suppressed as much as possible, and the masking jig 1 can be attached to and detached from the non-coating region 51 very easily. For this reason, for example, it is easy to connect and remove the masking jig 1 from the non-coating region 51 by connecting a robot arm to the base portion 2.

  Here, the interval Sw between the circular arc portions 322 in each spring element 321 of the spring body 32 is set larger than the inner diameter Hd of the screw hole 52 to be inserted. As described above, since each spring element 321 can be inserted into the screw hole 52 by elastically deforming the arc portion 322, the spring body 32 is provided in the screw hole 52 having an inner diameter Hd smaller than the interval Sw of the arc portions 322. Can be plugged in. The amount of deformation of the arc portion 322 of the spring element 321 varies depending on the material of the long metal material, the length and radius of the arc portion 322, and the like. For example, when a spring element 321 having a radius Sw of about 8 mm is formed by bending a spring steel wire (diameter 0.8 mm) as a guide to form a spring element 321 having a spacing Sw of about 5 mm, the spring element 321 is assembled. 32 can be preferably inserted into a screw hole 52 having an inner diameter of 4 mm to 5 mm.

  In the masking jig 1 of this example, the mounting portion main body 31 is fitted to the base portion 2 and only the spring body 32 protrudes from the abutting surface 21. Therefore, as shown in FIGS. The attachment to the motor cover 5 is completed with the contact surface 21 in close contact with the 51. At this time, each spring element 321 of the spring body 32 is pushed and elastically deformed by the inner surface of the screw hole 52, and the distance Sw between the arc portions 322 is reduced to the inner diameter Hd of the screw hole 52. Thereby, a restoring force is generated in the arc portion 322, and the arc portion 322 can be pressed against the inner surface of the screw hole 52 (see the white arrow in FIG. 10). In the mounting portion 3 of this example, the spring elements 321 are orthogonal to each other, so that the arc portions 322 exist in four directions at intervals of 90 degrees. That is, the spring body 32 presses the arc portions 322 from the four sides against the inner surface of the screw hole 52, and the mounting stability of the mounting portion 3 with respect to the screw hole 52 is ensured. The masking jig 1 with the mounting portions 3 attached to the four corners of the base portion 2 can be stably mounted on the non-coating region 51.

  The same applies to the case where the mounting portion 4 of another example is used. As shown in FIG. 11, a restoring force is generated in the arc portion 422 that is elastically deformed, and the arc portion 422 is formed on the inner surface of the screw hole 52 by the restoring force. It is pressed from the inside in the radial direction (see the white arrow in FIG. 11). Here, in the mounting portion 4 of another example, unlike the mounting portion 3 illustrated above, the arc portions 422 of the spring elements 421 are merely in a pair relationship in the radial direction, and the arc portions 422 of the spring elements 421 are pointed. It appears that it is only pressed against the inner surface of the screw hole 52 at two points of interest. However, since the spring element 421 made of a metal plate has a certain width, in practice, the side edges of each spring element 421, that is, substantially four points, are individually pressed against the inner surface of the screw hole 52, respectively. There is no possibility that the mounting stability is inferior to that of the mounting unit 3 illustrated above.

  In the mounting portion 3 of this example, the mounting portion main body 31 has an outer diameter larger than the inner diameter Hd of the screw hole 52 (see, for example, FIG. 10), and each of the mounting portions 3 removed from the base portion 2 as shown in FIG. It is also possible to use only the mounting part 3 and close only the screw holes 52. From now on, the base part 2 in the masking jig 1 is of course the masking member itself covering the non-coating part 51 as a whole, but constrains the plurality of mounting parts 3 in a specific positional relationship, and all at once. It can also be seen that this is an auxiliary member that allows the mounting portion 3 to be inserted into the corresponding screw hole 52. The mounting portions 3 used independently are inserted into and removed from the corresponding screw holes 52 individually. In addition, when it is desired to mask in a wider range than the mounting portion main body 31 around the screw hole 52, for example, a washer (not shown) is fitted to the spring body 32, and the washer is placed between the non-painted portion 51 and the mounting portion main body 31. You may make it pinch | interpose.

It is the perspective view which looked at an example of the masking jig to which this invention is applied from the upper part. It is the perspective view which looked at the masking jig of this example from the lower part. It is the exploded perspective view which looked at the masking jig of this example from the upper part. It is an expansion perspective view showing the mounting part of this example. It is a partial fracture expansion side view showing the mounting part of this example. It is a partial fracture expansion side view showing the mounting part of another example. It is a perspective view showing before attachment to a non-coating part of a masking jig of this example. It is the elements on larger scale showing the state before mounting with respect to the non-coating site | part of the masking jig of this example. FIG. 8 is a perspective view corresponding to FIG. 7 showing the masking jig of this example after being mounted on a non-coating region. FIG. 9 is a partially enlarged cross-sectional view corresponding to FIG. 8 illustrating a state where the masking jig of this example is attached to a non-painted portion. FIG. 9 is a partially enlarged cross-sectional view corresponding to FIG. 8 illustrating a state where a masking jig using another mounting portion is mounted on a non-painted portion. FIG. 8 is a perspective view corresponding to FIG. 7 showing a case where a mounting part is used alone.

Explanation of symbols

1 Masking jig

2 Base part
21 Contact surface
23 Fitting hole 3 Mounting part
31 Mounting body
313 Screw part
32 Spring body
321 Spring element
322 Arc part 4 Mounting part
41 Mounting body
413 Screw part
42 Spring body
421 Spring element
422 Arc part 5 Motor cover
51 Unpainted parts
52 Screw holes

Claims (5)

In a masking jig comprising a base portion having an abutting surface following a non-coating part of an object to be coated and a mounting part inserted into a recess in the non-coating part, the mounting part includes a mounting part body attached to the base part, The spring body is made of a metal spring body protruding from the mounting portion main body, and the spring body is made of a spring element formed by bending a long metal material to form an arc portion protruding outward in the radial direction. Masking jig. The masking jig according to claim 1, wherein the mounting portion is configured such that the mounting portion main body is detachably attached to the base portion. The mounting part is a spring body formed by assembling a plurality of spring elements formed by bending a long metal material into an elliptical shape in a side view so that the loop surfaces of the spring elements intersect in a horizontal plane. Or a masking jig as described above. The mounting portion is formed by assembling a plurality of spring elements formed by bending a long metal material into an arc shape when viewed from the side so that the arc portion of each spring element is convex outward in the radial direction. Or the masking jig | tool in any one of 2. The mounting portion protrudes the screw portion from the opposite side of the spring body protruding from the mounting portion main body, and the base portion has a step for engaging the mounting portion main body inserted from the contact surface side. A fitting hole is provided on the opposite side to allow the threaded portion to pass through.The fitting body is fitted into the fitting hole, and a nut is tightened on the threaded portion protruding from the opposite side of the contact surface to attach the fitting portion. The masking jig according to claim 1, which is fixed to the base portion.

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