Guide clamp in flip-up type

Abstract

To provide a guide clamp capable of fixing a plate material on a work table and preventing the plate material from being rattled through operation of an electric saw.SOLUTION: A guide clamp 10 is mainly provided with a bolt 111, a pair of nob nuts 112 screwed on the bolt 111, a guide 130, and a rotational part rotatably connecting the bolt 111 on the guide 130. The guide clamp 10 is fixed on a top board 21 of the work table 20 by clamping the top board 21 of the work table 20 with the pair of bolt nuts 112 in a vertical direction after inserting the bolt 111 into a through hole 22 previously arranged in the top board 21 of the work table 20. This makes positions of the pair of nob nuts 112 adjusted in a vertical direction such that a lower surface of the guide 130 abuts an upper surface of a plate material B to be cut when the guide 130 is inclined to a horizontal position.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a flip-up guide clamp. [Background technology]

[0002] When cutting wooden boards with an electric saw such as a circular saw or a jigsaw, a clamp is used to temporarily fix the board to the workbench. Also, when cutting a board in a straight line, a guide ruler is used to guide the electric saw along the straight line.

[0003] Patent Document 1 discloses a cutting ruler that includes a ruler body having a longitudinal side surface that serves as a guide for an electric saw, and two plate fasteners (a fixed plate fastener and a movable plate fastener) for fixing the ruler body to a plate material. By fixing the ruler body to the plate material that is the member to be cut, it is possible to prevent the ruler body from slipping or rattling relative to the plate material. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility model registration No. 3150561 Summary of the Invention [Problem to be solved by the invention]

[0005] In the cutting ruler of Patent Document 1, the ruler body is fixed to the plate by two plate fasteners that sandwich the end face of the plate. For example, when the plate is thin, the cutting ruler cannot be firmly fixed to the plate, and the cutting ruler may become loose due to the operation of the electric saw. In addition, the cutting ruler of Patent Document 1 is fixed to the plate. Therefore, a separate clamp is required to fix the plate to a workbench or the like so that the plate does not move. In order to prevent the plate from rotating, the plate is usually fixed using multiple clamps. Therefore, when changing the plate to be cut, it is necessary to remove and reattach multiple clamps, which is time-consuming.

[0006] An object of the present invention is to provide a guide clamp that can easily and reliably fix a plate material to a workbench and that prevents the plate material from rattling when an electric saw is operated. [Means for solving the problem]

[0007] According to an aspect of the present invention, there is provided a flip-up guide clamp for use with a plate placed on a top plate of a workbench, comprising: A guide ruler for an electric saw having a long plate shape in a longitudinal direction; a rotating part connected to one end of the electric saw guide ruler in the longitudinal direction so that the electric saw guide ruler can rotate between a horizontal position where the angle between the longitudinal direction and the vertical direction is 90° and a flip-up position where the angle between the longitudinal direction and the vertical direction is less than 90° in a vertical plane parallel to the vertical direction; A flip-up guide clamp is provided that includes a fixing mechanism connected to the rotating part and fixing the rotating part to the top plate. Effect of the Invention

[0008] According to the above configuration, since the flip-up type guide clamp has a fixing mechanism, the rotating part to which the electric saw guide ruler is connected can be easily and reliably fixed to the top plate. In addition, since the electric saw guide ruler can be tilted to a horizontal position, the entire lower surface of the electric saw guide ruler can be brought into close contact with the upper surface of the plate material. In this case, the plate material can be easily fixed to the top plate of the work table by fixing the tip of the electric saw guide ruler (the end opposite to the rod-shaped member in the longitudinal direction) to the top plate of the work table with a clamp or the like. At this time, since the entire lower surface of the electric saw guide ruler is in close contact with the upper surface of the plate material, the contact area between the lower surface of the electric saw guide ruler and the upper surface of the plate material can be increased. Accordingly, the frictional force between the lower surface of the electric saw guide ruler and the upper surface of the plate material can be increased. Therefore, when cutting the plate material using the electric saw, the operation of the electric saw prevents the plate material from rattling against the electric saw guide ruler. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic side view of a guide clamp 10. As shown in FIG. [Diagram 2] FIG. 2 is a schematic diagram of the guide clamp 10 as viewed from the base end side in the longitudinal direction of the guide 130. As shown in FIG. [Diagram 3] FIG. 3 is a schematic view of the guide clamp 10 as seen from above. [Figure 4] FIG. 4 is a schematic explanatory diagram showing the guide clamp 10 attached to a workbench 20. As shown in FIG. [Diagram 5] FIG. 5 is a schematic explanatory diagram of the acrylic guide 400. [Figure 6] FIG. 6 is a schematic explanatory diagram for explaining a state in which the acrylic guide 400 is used. [Figure 7] FIG. 7 is a schematic diagram of a circular saw 300. [Figure 8] FIG. 8 is a schematic explanatory diagram for explaining a guide clamp 210 having a clamp-type fixing mechanism. [Figure 9] FIG. 9 is a schematic diagram for explaining a guide clamp 310 having a screw-type fixing mechanism. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] A circular saw is an example of an electric power tool that cuts materials by rotating a saw blade (tipped saw) with a disk-shaped carbide tip. By replacing the saw blade according to the material to be cut, various materials such as wood, plastic, and metal can be cut. The following will be described by taking as an example a case where a circular saw is used as an electric saw to cut wood. Note that the present invention is not limited to such an embodiment, and a jigsaw, for example, can be used as the electric saw. As shown in FIG. 7, a circular saw 300 mainly includes a disk-shaped saw blade (tipped saw) 310, a safety cover 320, a handle 330, and a base 340. The handle 330 is a handle for the circular saw 300. The handle 330 is provided with a trigger button (not shown). The saw blade 310 rotates and the material can be cut only while the trigger button is pressed while the handle 330 is being held. When not in use, the saw blade 310 is covered with a safety cover 320 so that the saw blade 310 is not exposed, but as the saw blade 310 contacts the material and advances, the safety cover 320 opens naturally. The base 340 is a rectangular metal frame material provided to surround the saw blade 310. The circular saw 300 is advanced with the base 340 pressed against the material to be cut, thereby cutting the material.

[0011] When cutting a long straight line, a guide ruler for an electric saw is used. By moving the circular saw 300 forward with the end face of the base 340 in contact with the guide ruler, the material can be cut in a straight line. The inventor has invented a flip-up guide clamp that can be used as a guide ruler for an electric saw.

[0012] A flip-up type guide clamp 10 (hereinafter, simply referred to as guide clamp 10) according to an embodiment of the present invention will be described with reference to Figs. 1 to 4. As shown in Fig. 1, guide clamp 10 mainly includes a bolt 111 (an example of a rod-shaped member of the present invention), a pair of knob nuts 112 (an example of a fixing part of the present invention) attached to bolt 111, a guide 130 (an example of a guide ruler for an electric saw of the present invention), and a rotating part 150 that rotatably connects bolt 111 and guide 130. Note that guide clamp 10 is arranged so that bolt 111 is parallel in the vertical direction in a usage state (see Fig. 1). Note that a combination of bolt 111 and a pair of knob nuts 112 is an example of a fixing mechanism of the present invention.

[0013] As shown in FIG. 2, the rotating part 150 includes a U-shaped metal fitting 151 provided at one longitudinal end of the guide 130, a U-shaped metal fitting 152 provided at the upper end of the bolt 111, and a shaft 153 connecting the U-shaped metal fittings 151 and 152.

[0014] The U-shaped metal fitting 151 is a metal fitting having a U-shape that opens downward, and the guide 130 is fixed to its upper surface via a fixing pin 132. The U-shaped metal fitting 152 is a metal fitting having a U-shape that opens upward. The U-shaped metal fitting 152 is fixed in a vertical position with respect to the bolt 111, but is rotatable within a horizontal plane with the bolt 111 as a rotation axis. Accordingly, the U-shaped metal fitting 151 and the guide 130 fixed to the U-shaped metal fitting 151 are rotatable within a horizontal plane with the bolt 111 as a rotation axis.

[0015] The shaft 153 is disposed so as to penetrate both the U-shaped metal fittings 151 and 152. The U-shaped metal fitting 151 rotates in a vertical plane relative to the U-shaped metal fitting 152 with the shaft 153 as a rotation axis. Accordingly, the guide 130 fixed to the upper surface of the U-shaped metal fitting 151 rotates between a vertical position (one example of a flip-up position of the present invention) where the longitudinal direction is parallel to the vertical direction, and a horizontal position where the longitudinal direction is parallel to the horizontal direction (see FIG. 4). The guide 130 may be configured to rotate from the vertical position where the longitudinal direction is parallel to the vertical direction to a position inclined to the left in FIG. 4. The guide 130 may be configured to rotate from the horizontal position where the longitudinal direction is parallel to the horizontal direction to a position inclined to the lower side in FIG. 4.

[0016] As shown in FIG. 3, the guide 130 is a plate material having a rectangular shape long in one direction in a top view. As shown in FIG. 3, the direction perpendicular to the longitudinal direction of the guide 130 is called the width direction. The end faces (side end faces) of the guide 130 in the width direction are guide surfaces that contact the side end faces of the base 340 of the circular saw 300 and guide the circular saw 300, as described later. Therefore, the side end faces of the guide 130 are processed to be flat surfaces extending straight in a straight line. The material of the guide 130 is not particularly limited, but considering rigidity, durability, ease of processing the end faces in the width direction, etc., it is preferable to form the guide 130 from a metal material such as aluminum, iron, brass, or stainless alloy. There is no particular limit to the thickness of the guide 130, but it is desirable that the guide 130 has a sufficient thickness so that it does not warp or bend when pressing the plate material B to be cut from above, as described later. From this viewpoint, the thickness of the guide 130 is preferably 4 mm to 20 mm, and more preferably 5 mm to 15 mm. The thickness of the guide 130 may be 20 mm or more.

[0017] Next, an acrylic guide 400 as an example of an auxiliary guide used in conjunction with the guide clamp 10 will be described with reference to Fig. 5. As described above, the circular saw 300 is advanced to cut the material while the end face of the base 340 of the circular saw 300 is in contact with the side end face of the guide 130. Since the side end face of the guide 130 and the saw blade 310 of the circular saw 300 are spaced a predetermined distance apart in the width direction, the guide 130 must be positioned in advance at a position a predetermined distance away from the cut line of the material (see the ink line L in Fig. 6).

[0018] The acrylic guide 400 includes a main body 410 in which a groove 411 having a width substantially equal to that of the guide 130 is formed, and a guide part 420 formed of a light-transmitting material such as acrylic. The depth of the groove 411 of the main body 410 is equal to the height of the guide 130. The groove 411 of the main body 410 can be fitted into the guide 130 so as to cover the guide 130 from above. At this time, the distance D (see FIG. 6) in the width direction between the side end face of the guide 130 and the guide line GL is equal to the distance between the side end face of the guide 130 and the saw blade 310 of the circular saw 300. As shown in FIG. 6, the guide 130 can be accurately positioned at a position distanced D from the saw blade 310 of the circular saw 300 by drawing a marking line L indicating the cut line in advance on the plate material B to be cut, and adjusting the guide line GL and the marking line L so that they overlap in the vertical direction.

[0019] Next, a method of using the guide clamp 10 will be described with reference to FIG. 4. As shown in FIG. 4, the cutting table 25 and the plate material B to be cut are placed on the top plate 21 of the workbench 20. The cutting table 25 is a cushioning material arranged to prevent the blade 310 (see FIG. 7) of the circular saw 300 from hitting the top plate 21 when cutting the plate material B, and may be made of, for example, polystyrene foam or wood. The bolt 111 is inserted into the through hole 22 provided in advance in the top plate 21 of the workbench 20. After the bolt 111 is inserted into the through hole 22, the top plate 21 of the workbench 20 is sandwiched from above and below by a pair of knob nuts 112, so that the guide clamp 10 is fixed to the top plate 21 of the workbench 20. In this way, the guide clamp 10 is provided with a pair of knob nuts 112 as a fixing mechanism, so that the guide clamp 10 can be easily fixed to the top plate 21 of the workbench 20. At that time, the vertical positions of the pair of knob nuts 112 are adjusted so that the lower surface 130D of the guide 130 comes into contact with the upper surface of the plate material B to be cut when the guide 130 is tilted to the horizontal position. In this way, since the guide clamp 10 is provided with the pair of knob nuts 112 that also function as a height adjustment mechanism, the vertical position of the lower surface 130D of the guide 130 can be adjusted according to the thickness (vertical length) of the plate material B (and the cutting table 25).

[0020] After adjusting the vertical positions of the pair of knob nuts 112 so that the lower surface 130D of the guide 130 comes into contact with the upper surface of the plate material B to be cut when the guide 130 is tilted to the horizontal position, the acrylic guide 400 is attached to the guide 130. Then, the positions of the guide 130 and the plate material B are positioned so that the ink line L, which has been marked in advance along the cut line of the plate material B, and the guide line GL of the guide part 420 of the acrylic guide 400 overlap in the vertical direction.

[0021] With the guide 130 and the plate material B positioned, the tip of the guide 130 (the end opposite the bolt 111 in the longitudinal direction) is fixed to the top plate 21 of the workbench 20 by the clamp 200 (see FIG. 6). This allows the lower surface 130D of the guide 130 to be in close contact with the upper surface of the plate material B, and the guide 130 is fixed to the plate material B. At the same time, the plate material B is fixed to the workbench 20. In the guide clamp 10 according to the present invention, the entire lower surface 130D of the guide 130 is in close contact with the upper surface of the plate material B. Therefore, the contact area between the lower surface 130D of the guide 130 and the upper surface of the plate material B becomes large, and the frictional force between the lower surface 130D of the guide 130 and the upper surface of the plate material B becomes large accordingly. Therefore, the plate material B is prevented from rattling against the guide 130. Furthermore, when fixing the plate material B to the workbench 20 using one clamp, there is a risk that the plate material B may shift so as to rotate in a horizontal plane. For this reason, it is usually necessary to fix the plate material B to the workbench 20 using at least two or more clamps. In contrast, in the guide clamp 10 according to the present invention, the entire lower surface 130D of the guide 130 is in close contact with the upper surface of the plate material B, so that the plate material B can be held down by the surface. This makes it possible to prevent the plate material B from shifting so as to rotate in a horizontal plane. Furthermore, in the guide clamp 10 according to the present invention, since it is not necessary to fix the plate material B with multiple clamps, it is possible to reduce the effort of removing the clamp when replacing the plate material B.

[0022] The guide clamp 10 of this embodiment is positioned relative to the workbench 20 by inserting the bolt 111 into the through hole 22 provided in the top plate 21 of the workbench 20 as described above. However, as described above, the guide 130 is rotatable in a horizontal plane with the bolt 111 as a rotation axis. Therefore, when removing the clamp 200 to replace the plate material B, the guide 130 may rotate in a horizontal plane. If the guide 130 rotates in a horizontal plane when cutting a plurality of plate materials B of the same shape in succession, it becomes necessary to align the plate material B with the guide 130 every time the plate material B is replaced, which is troublesome.

[0023] In such a case, when aligning the guide 130 of the guide clamp 10 with the plate material B, abutment members for alignment can be fixed to the cutting table 25 by clamps or the like at a position where the guide 130 abuts and a position where the plate material B abuts. After removing the clamp 200 and replacing the plate material B, the plate material B and the guide 130 are positioned so as to abut against the abutment members, so that the plate material B and the guide 130 can be easily aligned to the positions where they were aligned previously. This reduces the effort required to align the plate material B with the guide 130 when replacing the plate material B.

[0024] The present invention is not limited to the above embodiment, and can be modified within the scope of the present invention. For example, in the above embodiment, the guide 130 is configured to rotate between a vertical position where the longitudinal direction is parallel to the up-down direction and a horizontal position where the longitudinal direction is parallel to the horizontal direction. However, the guide 130 does not necessarily have to rotate to the vertical position, and as long as the plate B can be replaced, it is sufficient that the guide 130 rotates to a position where the longitudinal direction of the guide 130 is less than 90° with respect to the up-down direction.

[0025] In the above embodiment, the bolt 111, which is an example of the rod-shaped member of the present invention, has a thread groove that becomes a male screw. Also, the pair of knob nuts 112, which is an example of the fixing part of the present invention, has a thread groove that becomes a female screw. Therefore, the pair of knob nuts 112 can both move along the extending direction of the rod-shaped member. This makes it possible to adjust the vertical position of the pair of knob nuts 112 so that the lower surface 130D of the guide 130 when the guide 130 is tilted to the horizontal position abuts on the upper surface of the plate material B to be cut. The rod-shaped member and fixing part according to the present invention are not limited to such an embodiment, and do not necessarily have to have a thread groove. The fixing part does not necessarily have to function as a height adjustment mechanism, and any appropriate configuration can be used as long as it can fix the rod-shaped member to the top plate of the workbench.

[0026] In the above embodiment, the bolt 111 of the guide clamp 10 is inserted into the through hole 22 provided in the top plate 21 of the workbench 20. This positions the guide clamp 10 relative to the workbench 20. However, the present invention is not limited to such an embodiment. For example, a clamp-type fixing mechanism can be adopted. As shown in FIG. 8, a guide clamp 210 having a clamp-type fixing mechanism may include a rotating part 150, a clamp 211 fixed to the lower end of the rotating part 150, and a guide 130 fixed to a U-shaped metal fitting 151 of the rotating part 150. The clamp 211 is an example of the fixing mechanism of the present invention. Compared to the guide clamp 110 of the above embodiment, the guide clamp 210 shown in FIG. 8 includes a fixing clamp 211 instead of the bolt 111 and a pair of knob nuts 112. As shown in FIG. 8, when the width of the top plate 221 of the work table 220 is equal to or shorter than the length of the guide 130 of the guide clamp 210, the guide clamp 210 can be fixed to the work table 220 by the fixing clamp 211 provided on the guide clamp 210. The distance L1 between the lower surface 211a of the upper end portion of the clamp 211 and the lower surface 130D of the guide 130 can be made equal to the thickness D1 of the cutting table 25. In this case, the height of the guide 130 can be easily adjusted by fixing the clamp 211 to the work table 220 while sandwiching a plate material B' having the same thickness (thickness D2) as the plate material B, such as an end piece of the plate material B to be cut. That is, the vertical distance (L1+D2) between the upper surface 221U of the top plate 221 of the work table 220 and the lower surface 130D of the guide 130 can be made equal to the sum (D1+D2) of the thicknesses of the cutting table 25 and the plate material B.

[0027] Also, for example, a screw-type fixing mechanism can be adopted, such as the guide clamp 310 shown in FIG. 9. As shown in FIG. 9, the guide clamp 310 having the screw-type fixing mechanism includes a rotating part 150, a guide 130 fixed to a U-shaped metal fitting 151 of the rotating part 150, a plate-shaped base part 320 extending downward from the rotating part 150, a plate-shaped locking part 340 fixed to the top plate 21 of the workbench 20 and extending downward from the top plate 21, and a bolt 345 and a fixing nut 346 inserted through the base part 320 and the locking part 340. The combination of the base part 320, the locking part 340, the bolt 345, and the nut 346 corresponds to the fixing mechanism of the present invention. A through hole 320h is formed at the lower end of the base part 320, and a long hole 340h is formed in the locking part 340. By fastening the bolt 345 with a nut 346 while it is inserted through the through hole 320h and the long hole 340h, the base 320 can be fixed to the locking part 340 fixed to the top plate 21 of the workbench 20. Since the long hole 340h is formed in the locking part 340, the position of the bolt 345 can be moved in the long axis direction (up and down direction) of the long hole 340h. This allows the height of the guide 130 to be easily adjusted.

[0028] The guide clamps 10, 210, 310 according to the present invention can be attached to a general-purpose workbench 20. However, the present invention is not limited to such an embodiment. For example, the guide clamps 10, 210, 310 may be fixed to a dedicated workbench. For example, in the dedicated workbench, the width of the top plate may be the same as the length of the guide 130 of the guide clamps 10, 210, 310, or may be shorter than the length of the guide 130. The dedicated workbench can also be placed on the general-purpose workbench 20 for use. [Explanation of symbols]

[0029] 10 Guide clamp 20 Workbench 21 Tabletop 111 Volts 112 Pair of Knob Nuts 130 Guide 150 Rotating section

Claims

1. A flip-up guide clamp for use with a plate placed on the top plate of a workbench, A guide ruler for an electric saw having a long plate shape in a longitudinal direction; a rotating part connected to one end of the electric saw guide ruler in the longitudinal direction so that the electric saw guide ruler can rotate between a horizontal position where the angle between the longitudinal direction and the vertical direction is 90° and a flip-up position where the angle between the longitudinal direction and the vertical direction is less than 90° in a vertical plane parallel to the vertical direction; a fixing mechanism connected to the rotating part and configured to fix the rotating part to the top plate; A flip-up guide clamp.

2. The fixing mechanism includes a rod-shaped member extending in the vertical direction and configured to be inserted into a through hole extending in the vertical direction formed in a top plate of the workbench; The flip-up type guide clamp according to claim 1 , further comprising a fixing portion that fixes the rod-shaped member to the top plate.

3. Further, a dedicated workbench having a top plate having a width equal to or shorter than the length of the electric saw guide ruler in the longitudinal direction, The flip-up guide clamp according to claim 1 , wherein the fixing mechanism has a clamp configured to clamp the top plate of the dedicated workbench.

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