Drill guide

Abstract

To provide a drill guide capable of improving location accuracy of drilling.SOLUTION: A drill guide 1 includes: a tabular base part 20 having a contact surface 20a contacting a machined surface WS of a workpiece W, a drill D can pass, and an open hole 23 through which the drill D can pass and which is provided on a contact surface; a cylindrical guide part 30 which is arranged away from a base part 20 in a thickness direction of the base part 20 and guides an end Da of the drill D into the open hole 23; a connection part 40 which extends in a thickness direction and connects the base part 20 and the guide part 30; and a window part 50 which is arranged between the base part 20 and the guide part 30 in the thickness direction, arranged adjacent to the connection part 40 in a circumferential direction of the guide part 30, and makes an end Da of the drill D arranged in the open hole 23 visually recognizable. A distance D1 between a base part 20 and the guide part 30 in the thickness direction is shorter than a dimension D2 in the thickness direction of the guide part 30.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a drill guide. [Background technology]

[0002] Patent Document 1 discloses a drill guide having a plate-shaped main body, which is provided with a through-hole through which a drill passes. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-144512 Summary of the Invention [Problem to be solved by the invention]

[0004] The drill guide of Patent Document 1 still has room for improvement in terms of improving the positional accuracy of drilling.

[0005] An object of the present invention is to provide a drill guide that can improve the positional accuracy of drilling. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention is configured as follows. A drill guide according to one aspect of the present invention includes: a plate-shaped base portion having a contact surface that contacts a processing surface of a workpiece and a through hole through which a drill can pass and provided in the contact surface; a cylindrical guide portion disposed apart from the base portion in a thickness direction of the base portion and configured to guide the tip of the drill into the through hole; a connection portion extending in the thickness direction and connecting the base portion and the guide portion; a window portion that is disposed between the base portion and the guide portion in the thickness direction and adjacent to the connection portion in the circumferential direction of the guide portion, and that is configured to allow the tip of the drill disposed in the through hole to be viewed from the outside; Equipped with The distance between the base portion and the guide portion in the thickness direction is shorter than the dimension of the guide portion in the thickness direction. [Effects of the Invention]

[0007] According to the present invention, the positional accuracy of the hole drilling process can be improved. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a drill guide according to an embodiment of the present invention. [Figure 2] FIG. 1 is an exploded perspective view of a drill guide according to an embodiment of the present invention. [Figure 3] FIG. 1 is a front view of a drill guide according to an embodiment of the present invention. [Figure 4] FIG. 2 is a rear view of the drill guide according to the embodiment of the present invention. [Figure 5] 4 is a cross-sectional view taken along line VV in FIG. 3. [Figure 6] FIG. 1 is a side view of a drill guide according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] A drill guide according to one aspect of the present invention includes: a plate-shaped base portion having a contact surface that contacts a processing surface of a workpiece and a through hole through which a drill can pass and provided in the contact surface; a cylindrical guide portion disposed apart from the base portion in a thickness direction of the base portion and configured to guide the tip of the drill into the through hole; a connection portion extending in the thickness direction and connecting the base portion and the guide portion; a window portion that is disposed between the base portion and the guide portion in the thickness direction and adjacent to the connection portion in the circumferential direction of the guide portion, and that is configured to allow the tip of the drill disposed in the through hole to be viewed from the outside; Equipped with The distance between the base portion and the guide portion in the thickness direction is shorter than the dimension of the guide portion in the thickness direction.

[0010] With this configuration, when drilling a hole in a workpiece using a drill, the user can visually check the tip of the drill positioned inside the through-hole from the outside through the window, thereby enabling the user to drill a hole in the workpiece while checking that the tip of the drill is positioned at the desired position, thereby improving the positional accuracy of the drilling.

[0011] With this configuration, the distance between the base and the guide in the thickness direction is shorter than the dimension of the guide in the thickness direction, so the guide can guide the drill to a position closer to the machining surface of the workpiece, compared to when the distance is longer. As a result, the position of the tip of the drill is prevented from shifting between the base and the guide, improving the positional accuracy of the drilling process.

[0012] With this configuration, the distance between the base portion and the guide portion in the thickness direction is shorter than the dimension of the guide portion in the thickness direction, so the drill guide can be made smaller than when the distance between the base portion and the guide portion is longer than the dimension of the guide portion.

[0013] In the drill guide, the base portion may be rectangular when viewed along the thickness direction, having a pair of first sides facing each other and a pair of second sides extending perpendicular to the pair of first sides and facing each other, the connection portion may include a first rib and a second rib extending in the thickness direction and connecting the base portion and the guide portion, the first rib and the second rib may be arranged at an interval along one of the pair of first sides, and the window portion may be arranged between the first rib and the second rib.

[0014] According to this configuration, the window is disposed between the first rib and the second rib, which are spaced apart along one of the pair of first sides, so that the user can easily see the tip of the drill from one of the pair of first sides through the window, thereby further improving the positional accuracy of the drilling process.

[0015] The drill guide may include four of the window portions, and the connection portion may further include a third rib and a fourth rib extending in the thickness direction and connecting the base portion and the guide portion, the third rib may be disposed at an interval from the first rib along one of the pair of second sides, and the fourth rib may be disposed at an interval from the second rib along the other of the pair of second sides and at an interval from the third rib along the other of the pair of first sides, and each of the four window portions may be disposed between the first rib and the second rib, 1 The second rib and the third rib, the third rib and the fourth rib, and the fourth rib and the second rib may be disposed between the second rib and the third rib, respectively.

[0016] According to this configuration, the window portions are respectively arranged between the first rib and the second rib arranged at a distance from each other along one of the pair of first sides, and between the third rib and the fourth rib arranged at a distance from each other along the other of the pair of first sides, so that the user can easily see the tip of the drill through the window portions from both sides of the pair of first sides. 1 The window portions are disposed between the rib and the third rib, and between the second rib and the fourth rib, which are spaced apart along the other of the pair of second sides, so that the user can easily see the tip of the drill through the window portions from both sides of the pair of second sides. As a result, the positional accuracy of the hole drilling can be further improved. In addition, the user can see the tip of the drill placed inside the through hole from various directions, which improves the convenience of the drill guide.

[0017] In the drill guide, the base portion may include a first scale portion arranged along at least one of the pair of first sides and serving as a guide for adjusting the position of the base portion relative to the workpiece in a direction along the pair of first sides, and a second scale portion arranged along at least one of the pair of second sides and serving as a guide for adjusting the position of the base portion relative to the workpiece in a direction along the pair of second sides.

[0018] With this configuration, the position of the base portion relative to the workpiece in the direction along the pair of first sides and the direction along the pair of second sides can be adjusted while referring to the first and second scale portions, making it easy to align the tip of the drill to the desired position, thereby further improving the positional accuracy of the drilling process.

[0019] The drill guide may further include a positioning member that has a positioning surface extending intersecting the contact surface and is detachable from the base portion, and the positioning surface may contact a non-machining surface of the workpiece that extends intersecting the machining surface to determine the position of the base portion relative to the workpiece.

[0020] With this configuration, the drill guide can be positioned relative to the workpiece by bringing the positioning surface into contact with the non-machining surface of the workpiece, which prevents the tip of the drill from unintentionally shifting position when drilling a hole in the workpiece, thereby further improving the positional accuracy of the drilling.

[0021] In the drill guide, the guide portion may include a cylindrical drill bushing that guides the tip of the drill into the through hole, and a tubular housing portion that houses the drill bushing.

[0022] According to this configuration, the guide portion has a drill bushing and a storage portion, so that the drill guide can be applied to multiple drills having different outer diameters by interchangeably using multiple drill bushings having different inner diameters.

[0023] In the drill guide, the base portion, the housing portion, and the connecting portion may be integrally molded from resin.

[0024] According to this configuration, the base portion, the housing portion, and the connecting portion are integrally molded from resin, so the drill guide can be made lighter than when the base portion, the housing portion, and the connecting portion are made from metal.

[0025] The drill guide may include a base member having the base portion, the accommodating portion, and the connecting portion, and a holder that is detachable from the base member and can hold a plurality of the drill bushings.

[0026] According to this configuration, the holder can store a plurality of drill bushings and base members together in a compact manner.

[0027] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0028] FIG. 1 is a perspective view of a drill guide 1 according to this embodiment. The drill guide 1 shown in FIG. 1 is used when drilling a hole in a workpiece W (shown in FIG. 6) using a drill D (shown in FIG. 6). The workpiece W is a piece of wood, for example, to be drilled by the drill. The drill D is set in the drill guide 1 placed on the workpiece W, and the drill D is driven to drill a hole in the workpiece W. At this time, because the drill D is set in the drill guide 1, it is possible to drill a hole at a desired position.

[0029] As shown in FIG. 1, the drill guide 1 of this embodiment includes a base member 10, a positioning member 60, and a holder .

[0030] The base member 10 determines the position of a drill D (shown in FIG. 6) relative to a workpiece W (shown in FIG. 6). The positioning member 60 determines the position of the base member 10 relative to the workpiece. The holder 70 holds a drill bushing 31 (described later) and can be attached to the base member 10.

[0031] FIG. 2 is an exploded perspective view of the base member 10 and the positioning member 60 of the drill guide 1 according to this embodiment.

[0032] As shown in FIGS. 1 and 2, the base member 10 includes a base portion 20, a guide portion 30, four ribs 40A to 40D (only the ribs 40A, 40B, and 40D are shown in FIGS. 1 and 2), and four window portions 50A to 50D (only the window portions 50A and 50D are shown in FIGS. 1 and 2). In the following description, when it is not necessary to particularly distinguish between the four ribs 40A to 40D, one of these may be simply referred to as a rib 40. In the following description, when it is not necessary to particularly distinguish between the four window portions 50A to 50D, one of these may be simply referred to as a window portion 50. In the base member 10 of this embodiment, the base portion 20, a storage portion 32 (described later), and the ribs 40 are integrally molded from resin.

[0033] Fig. 3 is a front view of the base member 10 and the positioning member 60 according to this embodiment. Fig. 4 is a rear view of the base member 10 and the positioning member 60 according to this embodiment. In Fig. 3, a lid portion 33, which will be described later, is indicated by a two-dot chain line.

[0034] As shown in FIGS. 3 and 4, the base portion 20 of this embodiment has a rectangular plate shape. In other words, the base portion 20 has a pair of long sides L1 and L2 and a pair of short sides S1 and S2. In the following description, the longitudinal direction of the base portion 20 (i.e., the direction along the long sides L1 and L2) will be referred to as the vertical direction X, the short direction of the base portion 20 (i.e., the direction along the short sides S1 and S2) will be referred to as the horizontal direction Y, and the thickness direction of the base portion 20 will be referred to as the height direction Z. The vertical direction X, the horizontal direction Y, and the height direction Z are perpendicular to one another. The dimension of the base portion 20 in the vertical direction X is 70 mm, and the dimension of the base portion 20 in the horizontal direction Y is 40 mm. The pair of long sides L1 and L2 of this embodiment are an example of a pair of first sides according to the present invention. Similarly, the pair of short sides S1 and S2 of this embodiment are an example of a pair of second sides according to the present invention.

[0035] The base portion 20 has a first surface 20a (shown in FIG. 4) that contacts the processing surface WS of the workpiece W (shown in FIG. 6), and a second surface 20b (shown in FIG. 3) that faces the first surface 20a. The first surface 20a and the second surface 20b are spaced apart in the height direction Z. The first surface 20a and the second surface 20b extend parallel to each other. Specifically, the first surface 20a and the second surface 20b extend along the vertical direction X and the horizontal direction Y. The first surface 20a according to this embodiment is an example of a contact surface according to the present invention.

[0036] The base portion 20 has a pair of first side surfaces 21A, 21B and a pair of second side surfaces 22A, 22B. The first side surfaces 21A, 21B and the second side surfaces 22A, 22B connect the first surface 20a and the second surface 20b in the height direction Z.

[0037] The first side surfaces 21A and 21B are arranged with a gap between them in the horizontal direction Y. The first side surfaces 21A and 21B extend parallel to each other. The first side surfaces 21A and 21B extend along the vertical direction X and the height direction Z. Each of the first side surfaces 21A and 21B connects the ends of the first surface 20a and the second surface 20b in the horizontal direction Y. Each of the first side surfaces 21A and 21B is arranged on a pair of long sides L1 and L2 of the base portion 20 when viewed along the height direction Z.

[0038] The second side surfaces 22A and 22B are spaced apart in the vertical direction X. The second side surfaces 22A and 22B extend parallel to each other. The second side surfaces 22A and 22B extend along the horizontal direction Y and the height direction Z. Each of the second side surfaces 22A and 22B connects the ends of the first surface 20a and the second surface 20b in the vertical direction X. Each of the second side surfaces 22A and 22B also connects the ends of the first surface 21A and the first surface 21B in the horizontal direction Y. Each of the first side surfaces 21A and 21B is located on a pair of short sides S1 and S2 of the base portion 20 when viewed along the height direction Z. The dimensions of the second side surfaces 22A and 22B in the horizontal direction Y are smaller than the dimensions of the first side surfaces 21A and 21B in the vertical direction X.

[0039] As shown in FIG. 4, the base portion 20 is provided with a through hole 23 through which a drill D (shown in FIG. 6) can pass. The through hole 23 penetrates the base portion 20 in the height direction Z. In other words, the through hole 23 penetrates the base portion 20 in the thickness direction. The through hole 23 of this embodiment is rectangular when viewed along the height direction Z (the direction perpendicular to the paper surface in FIG. 4). Specifically, the through hole 23 of this embodiment is square with sides measuring 18 mm when viewed along the height direction Z.

[0040] The inner periphery 24 of the base portion 20, which defines the through hole 23, is square when viewed along the height direction Z. The inner periphery 24 includes a pair of first portions 241A, 241B extending in the vertical direction X and a pair of second portions 242A, 242B extending in the horizontal direction Y. Each of the second portions 242A, 242B connects the ends of the first portions 241A, 241B in the vertical direction X to each other.

[0041] The first portion 241A is disposed opposite to the first side surface 21A of the base portion 20. The first portion 241A extends parallel to the first side surface 21A. In other words, the first portion 241A extends along the long side L1 of the base portion 20.

[0042] The first portion 241B is disposed opposite to the first side surface 21B of the base portion 20. The first portion 241B extends parallel to the first side surface 21B. In other words, the first portion 241B extends along the long side L2 of the base portion 20.

[0043] The second portion 242A is disposed opposite to the second side surface 22A of the base portion 20. The second portion 242A extends parallel to the second side surface 22A. In other words, the second portion 242A extends along the short side S1 of the base portion 20.

[0044] The second portion 242B is disposed opposite the second side surface 22B of the base portion 20. The second portion 242B extends parallel to the second side surface 22B. In other words, the second portion 242B extends along the short side S2 of the base portion 20.

[0045] As shown in FIG. 3, a slot 25 is provided in the base portion 20. The slot 25 penetrates the base portion 20 in the height direction Z. The slot 25 extends from the second side surface 22B of the base portion 20 along the vertical direction X. One end of the slot 25 in the vertical direction X (the left side in FIG. 3) terminates inside the base portion 20. The other end of the slot 25 in the vertical direction X (the right side in FIG. 3) opens to the other side in the vertical direction X.

[0046] As shown in Fig. 4, a pair of grooves 26A, 26B are formed in the first surface 20a of the base portion 20. The pair of grooves 26A, 26B are spaced apart in the horizontal direction Y. Each of the pair of grooves 26A, 26B extends in the vertical direction X from the second side surface 22B of the base portion 20 to the second portion 242B of the inner periphery 24 that defines the through hole 23. A slot 25 is disposed between the pair of grooves 26A, 26B.

[0047] As shown in FIG. 3, scale portions 27A to 27C are provided on the second surface 20b of the base portion 20. The scale portion 27A is provided along one long side L1 of the base portion 20. The scale portion 27B is provided along one short side S1 of the base portion 20. The scale portion 27C is provided along the other long side L2 of the base portion 20. In the following description, when there is no need to particularly distinguish between the scale portions 27A to 27C, one of them may be simply referred to as the scale portion 27. The scale portion 27 is composed of multiple scales. In this embodiment, the multiple scales are arranged every 1 mm. The scale portions 27A and 27C serve as guides for adjusting the position of the base portion 20 in the vertical direction X relative to the workpiece W (shown in FIG. 6), and the scale portion 27C serves as a guide for adjusting the position of the base portion 20 in the horizontal direction Y relative to the workpiece. The graduated portions 27A and 27C are an example of a first graduated portion according to the present invention, and the graduated portion 27B is an example of a second graduated portion according to the present invention.

[0048] 4, a pair of first locking portions 28A, 28B are provided on the first surface 20a of the base portion 20. The pair of first locking portions 28A, 28B are arranged with a gap between them in the horizontal direction Y. Furthermore, each of the pair of first locking portions 28A, 28B extends along the vertical direction X.

[0049] Fig. 5 is a cross-sectional view taken along line VV in Fig. 3. Fig. 6 is a side view of the base member 10 and the positioning member 60 according to this embodiment as viewed along the lateral direction Y.

[0050] As shown in FIG. 2, the guide portion 30 includes a drill bushing 31, a receiving portion 32, and a cover portion 33.

[0051] As shown in FIGS. 2 and 5, the drill bushing 31 is a member that guides the drill D. The drill bushing 31 is made of metal. The drill bushing 31 is cylindrical. The drill bushing 31 has a guide hole 31a through which the drill is inserted. The drill bushing 31 is arranged so that the axis A of the guide hole 31a passes through the center C (shown in FIG. 4) of the through hole 23. The axis A of the guide hole 31a extends perpendicular to the first surface 20a. The drill bushing 31 according to this embodiment is applicable to a drill D having an outer diameter of 23 mm, for example. In other words, the diameter of the guide hole 31a is greater than 23 mm. The drill guide 1 according to this embodiment is applicable to drills having different outer diameters by replacing the drill bushing 31 with a drill bushing having a guide hole 31a with a different diameter.

[0052] The accommodation portion 32 is cylindrical and has a bottom that is open on one side in the height direction Z (the upper side in FIG. 5). The accommodation portion 32 is made of resin. The inner diameter of the accommodation portion 32 is slightly larger than the outer diameter of the drill bushing 31. A circular hole 32b is provided in the bottom 32a of the accommodation portion 32, allowing the drill D to pass through. This hole 32b is arranged coaxially with the guide hole 31a of the drill bushing 31.

[0053] The lid portion 33 is a member that closes an opening located on one side in the height direction Z of the storage portion 32 (the upper side in FIG. 5). The lid portion 33 is made of resin. The lid portion 33 is provided with a circular hole 33a through which the drill D can pass. This hole 33a is arranged coaxially with the guide hole 31a of the drill bushing 31.

[0054] As shown in FIG. 6, the guide portion 30 is spaced apart from the base portion 20 in the height direction Z. The distance D1 between the base portion 20 and the guide portion 30 in the height direction Z is shorter than the dimension D2 of the guide portion 30 in the height direction Z. More specifically, the distance D1 between the second surface 20b of the base portion 20 and the bottom 32a of the housing portion 32 (shown in FIG. 5) in the height direction Z is shorter than the dimension D2 of the guide portion 30 in the height direction Z. The distance D1 corresponds to the dimension of the window portion 50 (described later) in the height direction Z, and may be a distance that allows the tip Da of the drill D placed in the through hole 23 to be visible from the outside. In this embodiment, the distance D1 is, for example, 1.5 mm. On the other hand, the dimension D2 of the guide portion 30 in the height direction Z is, for example, 16 mm.

[0055] 3, when viewed along the height direction Z (the direction perpendicular to the paper surface in FIG. 3), the outer shape of the guide portion 30 is larger than the outer shape of the through-hole 23. More specifically, the diameter of the lid portion 33 is larger than the dimension (length) of one side of the through-hole 23.

[0056] As shown in FIGS. 1 and 2, the rib 40 is a plate-like member that extends in the height direction Z and connects the base portion 20 and the guide portion 30. More specifically, as shown in FIG. 4, the rib 40 connects a corner of the inner periphery 24 of the base portion 20 to the outer periphery surface of the accommodating portion 32. In other words, one end of the rib 40 in the height direction Z is connected to the outer periphery surface of the accommodating portion 32, and the other end of the rib 40 in the height direction Z is connected to a corner of the inner periphery 24 of the base portion 20. The rib 40 of this embodiment is an example of a connecting portion according to the present invention. Furthermore, the ribs 40A to 40D of this embodiment are examples of first to fourth ribs according to the present invention, respectively.

[0057] As shown in FIGS. 1 and 2, rib 40A extends from one side in the height direction Z (upper side in FIGS. 1 and 2) to the other side (lower side in FIGS. 1 and 2), and toward one side in the vertical direction X (rear side in FIGS. 1 and 2) and one side in the horizontal direction Y (right side in FIGS. 1 and 2). Rib 40B extends from one side in the height direction Z to the other side, and toward the other side in the vertical direction X (front side in FIGS. 1 and 2) and one side in the horizontal direction Y. Rib 40C, although not shown, extends from one side to the other in the height direction Z, and toward one side in the vertical direction X and the other side in the horizontal direction Y (left side in FIGS. 1 and 2). Rib 40D extends from one side to the other in the height direction Z, and toward the other side in the vertical direction X and the other side in the horizontal direction Y.

[0058] As shown in FIG. 3, the ribs 40A to 40D are arranged at equal intervals along the circumferential direction centered on the axis A. In other words, the ribs 40 are arranged at 90° intervals along the circumferential direction. Each of the ribs 40A to 40D extends in a radial direction centered on the axis A. Specifically, when viewed along the height direction Z (a direction perpendicular to the paper surface in FIG. 3), the rib 40A extends from the storage section 32 toward one side in the vertical direction X (left side in FIG. 3) and inclined toward one side in the horizontal direction Y (upper side in FIG. 3). When viewed along the height direction Z, the rib 40B extends from the storage section 32 toward the other side in the vertical direction X (right side in FIG. 3) and inclined toward one side in the horizontal direction Y. When viewed along the height direction Z, the rib 40C extends from the storage section 32 toward one side in the vertical direction X and inclined toward the other side in the horizontal direction Y (lower side in FIG. 3). The rib 40D extends obliquely toward the other side in the horizontal direction Y from the storage portion 32 toward the other side in the vertical direction X when viewed along the height direction Z.

[0059] The ribs 40A and 40B extend from the storage portion 32 toward one side in the horizontal direction Y so as to be spaced apart from each other in the vertical direction X. AThe ribs 40C and 40D extend from the storage portion 32 toward one side in the longitudinal direction X so as to be separated from each other in the lateral direction Y. The ribs 40C and 40D extend from the storage portion 32 toward the other side in the lateral direction Y so as to be separated from each other in the longitudinal direction X. B extend from the storage portion 32 toward the other side in the vertical direction X so as to be separated from each other in the horizontal direction Y.

[0060] 1 and 2, the window portion 50 of this embodiment is an opening configured to allow the tip Da (shown in FIG. 6) of the drill D placed inside the through-hole 23 to be visually observed from the outside. The window portion 50 is disposed between the base portion 20 and the guide portion 30. As shown in FIG. 3, the window portion 50 is defined by the inner periphery 24 of the base portion 20, the accommodating portion 32, and two ribs 40 adjacent to each other in the circumferential direction about the axis A. In other words, the window portion 50 is disposed adjacent to the ribs 40 in the circumferential direction about the axis A.

[0061] As shown in FIG. 3, the window portion 50A is defined by the first portion 241A of the base portion 20, a portion of the storage portion 32 facing the first portion 241A, and two ribs 40A and 40B. Although not shown, the window portion 50A extends obliquely from the storage portion 32 toward one side in the horizontal direction Y (upper side in FIG. 3) to the other side in the height direction Z (toward the back of the paper in FIG. 3). This makes it easy to view the inside of the through-hole 23 through the window portion 50 from one side in the horizontal direction Y and one side in the height direction Z (near side in FIG. 3), that is, from diagonally above. Furthermore, the dimension of the window portion 50A in the vertical direction X increases from the storage portion 32 toward one side in the horizontal direction Y. This makes it easy to view the inside of the through-hole 23 through the window portion 50A from one side in the horizontal direction Y.

[0062] The window portion 50B is defined by the second portion 242A of the base 20, a portion of the housing 32 facing the second portion 242A, and two ribs 40A and 40C. Although not shown, the window portion 50B extends obliquely from the housing 32 toward one side in the vertical direction X (to the left in FIG. 3 ) to the other side in the height direction Z (toward the back of the paper in FIG. 3 ). This makes it easy to view the inside of the through-hole 23 through the window portion 50B from one side in the vertical direction X and one side in the height direction Z (toward the front of the paper in FIG. 3 ), that is, from diagonally above. Furthermore, the dimension of the window portion 50B in the horizontal direction Y increases from the housing 32 toward one side in the vertical direction X. This makes it easy to view the inside of the through-hole 23 through the window portion 50B from one side in the vertical direction X.

[0063] The window portion 50C is defined by the first portion 241B of the base 20, a portion of the storage portion 32 facing the first portion 241B, and two ribs 40C and 40D. Although not shown, the window portion 50C extends obliquely from the storage portion 32 toward the other side in the horizontal direction Y (downward in FIG. 3 ) to the other side in the height direction Z (toward the back of the paper in FIG. 3 ). This makes it easy to view the inside of the through-hole 23 through the window portion 50C from the other side in the horizontal direction Y and one side in the height direction Z (forward in FIG. 3 ), that is, from diagonally above. Furthermore, the dimension of the window portion 50A in the vertical direction X increases from the storage portion 32 toward the other side in the horizontal direction Y. This makes it easy to view the inside of the through-hole 23 through the window portion 50C from the other side in the horizontal direction Y.

[0064] The window portion 50D is defined by the second portion 242B of the base 20, a portion of the storage portion 32 facing the second portion 242B, and two ribs 40D, 40B. Although not shown, the window portion 50A extends from the storage portion 32 toward the other side in the vertical direction X (to the right in FIG. 3 ) and at an angle toward the other side in the height direction Z (toward the back of the paper in FIG. 3 ). This makes it easy to view the inside of the through-hole 23 through the window portion 50D from the other side in the horizontal direction Y and one side in the height direction Z (toward the front of the paper in FIG. 3 ), that is, from diagonally above. Furthermore, the dimension of the window portion 50D in the horizontal direction Y increases from the storage portion 32 toward the other side in the vertical direction X. This makes it easy to view the inside of the through-hole 23 through the window portion 50D from the other side in the vertical direction X.

[0065] The positioning member 60 is detachable from the base member 10. As shown in Fig. 6, the positioning member 60 comes into contact with the side surface NS of the workpiece W, thereby positioning the base member 10 with respect to the workpiece W. The side surface NS is an example of a non-machined surface according to the present invention.

[0066] The positioning member 60 includes a positioning surface 61 and a sliding surface 62 .

[0067] The positioning surface 61 extends along the lateral direction Y and the height direction Z when the positioning member 60 is attached to the base member 10.

[0068] The sliding surface 62 extends along the longitudinal direction X and the lateral direction Y when the positioning member 60 is attached to the base member 10.

[0069] As shown in FIG. 2, the sliding surface 62 is provided with a pair of ridges 63A, 63B extending along the vertical direction X. The pair of ridges 63A, 63B are spaced apart in the horizontal direction Y. Each of the ridges 63A, 63B protrudes to one side in the Z direction. The pair of ridges 63A, 63B are disposed inside a pair of grooves 26A, 26B (shown in FIG. 4) provided in the base portion 20. This restricts relative movement of the positioning member 60 with respect to the base member 10 in the horizontal direction Y, while allowing relative movement of the positioning member 60 with respect to the base member 10 in the vertical direction X.

[0070] A pair of second locking portions 66A, 66B are provided on the sliding surface 62. Each of the pair of second locking portions 66A, 66B engages with a pair of first locking portions 28A, 28B (shown in FIG. 4) provided on the first surface 20a of the base portion 20, respectively, to determine the position of the positioning member 60 relative to the base member 10. The pair of second locking portions 66A, 66B are spaced apart in the horizontal direction Y. The pair of second locking portions 66A, 66B extend along the vertical direction X. Each of the second locking portions 66A, 66B has a plurality of protrusions extending along the horizontal direction Y that are connected in the vertical direction X. As shown in FIG. 6, each of the second locking portions 66A, 66B has a wave-like shape when viewed along the horizontal direction Y (the direction perpendicular to the paper surface in FIG. 6). Each of the first locking portions 28A, 28B has a plurality of grooves extending along the horizontal direction Y that are connected in the vertical direction X. Each of the first locking portions 28A, 28B is formed in a wave shape similar to each of the second locking portions 66A, 66B when viewed along the horizontal direction Y. Furthermore, the position of the bottom of the groove that constitutes each of the first locking portions 28A, 28B coincides with the position of the scale that constitutes each of the scale portions 27A, 27B. As a result, in this embodiment, the position of the positioning member 60 in the vertical direction X relative to the base member 10 can be determined in 1 mm increments.

[0071] 2, the positioning member 60 is attached to the base member 10 by a screw 64 and a nut 65. The screw 64 passes through the slot 25 and then passes through a mounting hole 60a in the positioning member 60. The nut 65 is threadedly engaged with the screw 64 that has passed through the mounting hole 60a. The positioning member 60 can be moved relative to the base member 10 in the vertical direction X by loosening the screw 64.

[0072] As shown in FIG. 1 , the drill guide 1 includes a holder 70 that holds a plurality of (four in this embodiment) drill bushings 31. The plurality of drill bushings 31 have the same outer shape. However, the plurality of drill bushings 31 have different inner diameters. By interchangeably using drill bushings 31 with different inner diameters, the drill guide 1 can be used for drills D with different outer diameters. The holder 70 also includes a clip 71 that clamps the base portion 20 of the base member 10. When the drill guide 1 is not in use, the base member 10 and the replacement drill bushing 31 can be stored together in a compact manner by clamping the base member 10 with the clip 71.

[0073] <Usage example> An example of how the drill guide 1 is used will be described below.

[0074] 6, the base member 10 is placed on the processing surface WS of the workpiece W. At this time, the first surface 20a of the base portion 20 comes into contact with the processing surface WS, thereby positioning the base member 10 in the height direction Z relative to the workpiece W. Furthermore, the positioning surface 61 of the positioning member 60 comes into contact with the side surface NS of the workpiece W, thereby positioning the base member 10 in the vertical direction X relative to the workpiece W.

[0075] In this state, when the drill D is inserted into the guide hole 31a (shown in FIG. 5) of the guide part 30 from one side in the height direction Z (the upper side in FIG. 6), the guide hole 31a guides the tip Da of the drill D into the through-hole 23. In this state, a driver (not shown) to which the drill D is connected is driven to drill a hole in the workpiece W. When the tip Da of the drill D is positioned in the through-hole 23, the tip Da of the drill D can be seen from the outside through the window part 50. Therefore, the workpiece W can be drilled with the position of the tip Da of the drill D aligned with the desired drilling position.

[0076] The drill guide 1 according to this embodiment has the following functions.

[0077] According to this embodiment, when drilling a hole in a workpiece W using the drill D, the user can visually confirm from the outside the tip Da of the drill D disposed inside the through-hole 23 through the window portion 50. As a result, the user can drill a hole in the workpiece W while checking that the tip Da of the drill D is positioned at a desired position, thereby improving the positional accuracy of the hole drilling.

[0078] According to this embodiment, the distance D1 between the base portion 20 and the guide portion 30 in the height direction Z is shorter than the dimension D2 of the guide portion 30 in the height direction Z, and therefore the guide portion 30 can guide the drill D to a position closer to the machining surface WS of the workpiece W, compared to when the distance D1 is longer than the dimension D2. As a result, unintentional displacement of the position of the tip Da of the drill D between the base portion 20 and the guide portion 30 is suppressed, thereby improving the positional accuracy of the hole drilling.

[0079] According to this embodiment, the distance D1 between the base portion 20 and the guide portion 30 in the height direction Z is shorter than the dimension D2 of the guide portion 30 in the height direction Z, so the drill guide 1 can be made smaller than when the distance D1 is longer than the dimension D2.

[0080] According to this embodiment, the window portion 50A is disposed between the ribs 40A and 40B that are spaced apart along the long side L1 of the base portion 20, so that the user can easily see the tip Da of the drill D through the window portion 50A when facing the long side L1 of the base portion 20. As a result, the positional accuracy of the hole drilling can be further improved.

[0081] According to this embodiment, the window portion 50B is disposed between the ribs 40A and 40C that are spaced apart along the short side S1 of the base portion 20, so that the user can easily see the tip Da of the drill D through the window portion 50B when facing the short side S1 of the base portion 20. As a result, the positional accuracy of the hole drilling can be further improved.

[0082] According to this embodiment, the window portion 50C is disposed between the ribs 40C and 40D that are spaced apart along the long side L2 of the base portion 20, so that the user can easily see the tip Da of the drill D through the window portion 50C when facing the long side L2 of the base portion 20. As a result, the positional accuracy of the hole drilling can be further improved.

[0083] According to this embodiment, the ribs 40 are spaced apart from one another along the short side S2 of the base portion 20. B Since the window portion 50D is disposed between the short side S2 of the base portion 20 and the rib 40D, the user can easily see the tip Da of the drill D through the window portion 50D when facing the short side S2 of the base portion 20. As a result, the positional accuracy of the hole drilling can be further improved.

[0084] According to this embodiment, since the four windows 50A to 50D are provided, the tip Da of the drill D placed inside the through-hole 23 can be seen from various directions. As a result, the usability of the drill guide 1 can be improved.

[0085] According to this embodiment, by adjusting the position of the base portion 20 relative to the workpiece W in the vertical direction X and the horizontal direction Y while referring to the scale portions 27A, 27C and 27B, the tip Da of the drill D can be easily aligned to a desired position. As a result, the positional accuracy of the hole drilling can be further improved.

[0086] According to this embodiment, the drill guide 1 can be positioned relative to the workpiece W by bringing the positioning surface 61 into contact with the side surface NS of the workpiece W. As a result, unintentional misalignment of the position of the tip Da of the drill D when drilling a hole in the workpiece W is suppressed, thereby further improving the positional accuracy of the drilling process.

[0087] According to this embodiment, the guide portion 30 has a drill bushing 31 and a storage portion 32, so that by interchangeably using multiple drill bushings 31 having different inner diameters, the drill guide 1 can also be applied to multiple drills D having different outer diameters.

[0088] According to this embodiment, the base portion 20, the accommodating portion 32, and the rib 40 are integrally molded from resin, making the drill guide 1 lighter than when the base portion 20, the accommodating portion 32, and the rib 40 are made of metal.

[0089] According to this embodiment, the holder 70 can store a plurality of drill bushings 31 and the base member 10 together in a compact manner.

[0090] Any of the various embodiments and modifications described above may be combined as appropriate to achieve the effects of each of them.

[0091] While the present invention has been fully described in connection with preferred embodiments, with appropriate reference to the drawings, various changes and modifications will become apparent to those skilled in the art, and it is to be understood that such changes and modifications are included within the scope of the present invention as defined by the appended claims unless they depart therefrom. [Explanation of symbols]

[0092] 1 Drill Guide 10 Base member 20 Base 20a 1st surface (contact surface) 20b 2nd side 21A,21B 1st side 22A,22B 2nd side 23 Through hole 24 inner circumference 241A,241B Part 1 242A,242B 2nd part 25 slots 26,26A,26B Groove 27, 27A~27C Scale section (1st scale section, 2nd scale section) 28, 28A, 28B First locking part 30 Information Department 31 Drill bushing 31a Guide hole 32 Storage section 32a bottom 32b hole 33 Lid 33a hole 40, 40A~40D Rib (connection part) 50, 50A~50B Window 60 Positioning member 60a mounting hole 61 Locating surface 62 sliding surface 63,63A,63B protrusion 64 screws 65 Nut 66, 66A, 66B Second locking part 70 Holder 71 clips

Claims

1. a plate-shaped base portion having a contact surface that contacts a processing surface of a workpiece and a through hole through which a drill can pass and provided in the contact surface; a cylindrical guide portion disposed apart from the base portion in a thickness direction of the base portion and configured to guide the tip of the drill into the through hole; a connection portion extending in the thickness direction and connecting the base portion and the guide portion; a window portion that is disposed between the base portion and the guide portion in the thickness direction and adjacent to the connection portion in the circumferential direction of the guide portion, and that is configured to allow the tip of the drill disposed in the through hole to be viewed from the outside; Equipped with A drill guide, wherein the distance between the base portion and the guide portion in the thickness direction is shorter than the dimension of the guide portion in the thickness direction.

2. the base portion has a rectangular shape when viewed along the thickness direction, the rectangular shape having a pair of first sides opposed to each other and a pair of second sides extending perpendicular to the pair of first sides and opposed to each other; the connecting portion includes a first rib and a second rib extending in the thickness direction and connecting the base portion and the guide portion, the first rib and the second rib are arranged at an interval along one of the pair of first sides, The drill guide according to claim 1 , wherein the window portion is disposed between the first rib and the second rib.

3. four of the windows; the connecting portion further includes a third rib and a fourth rib extending in the thickness direction and connecting the base portion and the guide portion, the third rib is disposed along one of the pair of second sides at a distance from the first rib, the fourth rib is disposed at an interval from the second rib along the other of the pair of second sides, and is disposed at an interval from the third rib along the other of the pair of first sides, 3. The drill guide according to claim 2, wherein the four windows are respectively arranged between the first rib and the second rib, between the first rib and the third rib, between the third rib and the fourth rib, and between the fourth rib and the second rib.

4. The base portion is a first scale portion provided along at least one of the pair of first sides and serving as a guide for adjusting the position of the base portion relative to the workpiece in a direction along the pair of first sides; a second scale portion provided along at least one of the pair of second sides and serving as a guide for adjusting the position of the base portion relative to the workpiece in a direction along the pair of second sides; The drill guide of claim 3 , comprising:

5. a positioning member detachably attached to the base portion, the positioning member having a positioning surface extending across the contact surface; The drill guide according to claim 1 , wherein the positioning surface determines the position of the base portion relative to the workpiece by contacting a non-working surface of the workpiece that extends across the working surface.

6. The guide unit is a cylindrical drill bushing that guides the tip of the drill into the through hole; a cylindrical receiving portion that receives the drill bushing; The drill guide of claim 1 , comprising:

7. The drill guide according to claim 6 , wherein the base portion, the housing portion, and the connecting portion are integrally molded from resin.

8. a base member having the base portion, the housing portion, and the connection portion; a holder that is detachable from the base member and that can hold the drill bushing; The drill guide according to claim 6 or 7, comprising:

Images