JP2013226795A - Guide tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guide tool which prevents a cutting line from curving in carrying out cut operation and grooving by using an electric circular saw.SOLUTION: A guide tool 11 has a U-shape cross section formed of a top plate 13 which is in contact with a lower surface of a base plate 53 of an electric circular saw 51, and a pair of side plates 15 which sandwich side surfaces S of a workpiece W and extend along an advancing direction of a saw blade 52, and has a structure which can be mounted on the electric circular saw 51 through a fixture 19 such as a bolt. The top plate 13 has a window part 12 in which the saw blade 52 enters. The side plates 15 secure elongation by at least about a diameter of the saw blade 52. By mounting such the guide tool 11 on the electric circular saw 51, the workpiece W is sandwiched in the guide tool 11 without a clearance, and during operation, the guide tool 11 moves along the side surfaces S of the workpiece W without deviation, and a cutting line formed by the saw blade 52 is not curved but becomes linear.

Description

  The present invention relates to a guide that can prevent a cutting line from being curved when a cutting operation or grooving is performed using an electric circular saw.

  The electric round saw is a tool that rotates a saw blade having a diameter of about 100 to 200 mm with an electric motor, and can be easily carried by one person, and is faster than a manual saw, and is widely used in construction sites. The basic configuration of this electric circular saw is shown in FIG. The saw blade has a disc shape, and a cover for preventing scattering of chips and the like is disposed on the outer periphery thereof, and the driving motor is disposed concentrically with the saw blade. The base plate is a flat part that serves as a base for the electric circular saw, and in use, is brought into contact with a workpiece such as a plate material. The electric motor is integrated with the cover, and the cover is attached to the base plate via a hinge. Therefore, the saw blade can swing with the hinge as a fulcrum, and the protrusion amount of the saw blade from the lower surface of the base plate can be adjusted freely. In addition, a grip is provided on the side peripheral surface of the electric motor.

  When using the electric circular saw, first, the base plate is placed on the upper surface of the workpiece, and then the electric motor is operated by applying force to the grip to bring the base plate into close contact with the workpiece. After that, the whole is gradually advanced while preventing the base plate from floating. At that time, as shown in FIG. 14, a guide is incorporated on the side of the base plate so that the electric circular saw can go straight. The guide is attached to the tip of the L-shaped slider and is brought into contact with the side surface of the workpiece. The slider can be moved by loosening the butterfly screw, the distance from the saw blade to the guide can be freely adjusted, and the saw blade can be moved along the cutting line in the figure.

  Examples of prior art related to the present invention include the following patent documents. Patent Document 1 discloses a “parallel ruler for a portable electric circular saw” that can stably guide a material to be cut and can be mounted on both left and right sides of the electric circular saw. This parallel ruler supports a guide plate (guide surface constituent member) that contacts the end face of the workpiece by a guide bar or a guide base, and the guide plate can be configured to change the mounting position with the guide base. ing. Therefore, even when the parallel ruler is mounted on either the left or right side of the electric circular saw, the guide plate can be attached at the optimum position, and the workpiece can be stably guided.

  Patent Document 2 discloses a “cutting width determination ruler for an electric circular saw tool” capable of quickly switching between a cutting operation requiring accuracy and a cutting operation not requiring accuracy. This cutting width determination ruler is provided with a movable guide plate at the tip of the support bar that protrudes from the base, and the function as a cutting width determination ruler is temporarily raised by flipping up the guide plate as necessary. Can be canceled. Therefore, work switching can be performed quickly.

JP-A-8-224701 Utility model registration No.3051874

  As shown in FIG. 14, when cutting a workpiece with an electric circular saw, it is necessary to keep pressing the guide against the side surface of the workpiece in order to make the cut surface straight without distortion. However, in many cases, the guide is temporarily separated from the workpiece due to sudden reaction force or fatigue, and the cutting line is locally curved. Even when such a curvature occurs, there is often no problem, but there may be a problem in a place where accuracy is required or a member to be considered for aesthetics.

  In recent years, wooden buildings often use metal fittings to connect members to ensure earthquake resistance. In order to embed the metal fittings, grooves and holes are provided in advance in the member. However, these parts require a certain degree of accuracy and are often processed at the factory based on the design drawing. However, with the spread of metal fittings, there is a demand for processing grooves and the like with high precision even in environments where facilities are not fully prepared, such as construction sites.

  The present invention has been developed on the basis of such a situation, and an object thereof is to provide a guide that can prevent the cutting line from being bent when a cutting operation or a grooving process is performed using an electric circular saw.

  The invention according to claim 1 for solving the above-mentioned problems is mounted on a disk-shaped saw blade for cutting the upper surface of the workpiece, an electric motor for driving the saw blade, and the upper surface of the workpiece. A base plate that is used integrally with an electric circular saw having a base plate, and a top plate that contacts a lower surface of the base plate; a pair of side plates that sandwich a side surface of the workpiece and extend in a traveling direction of the saw blade; The cross section is formed of a U-shaped cross section, which can be attached to the electric circular saw through a fixture such as a bolt, and the top plate is provided with a window portion into which the saw blade enters, and the side plate has at least A guide tool having an extension about the diameter of the saw blade.

  The present invention is used integrally with an electric round saw mounted with a disk-shaped saw blade, and the electric round saw can have a detailed structure as long as it has an electric motor and a base plate. In addition, the present invention is assumed to be used for cutting work or grooving of a workpiece finished to a predetermined width, and cannot cope with a workpiece having an arbitrary width. In the present application, the description regarding the electric circular saw is based on a posture in which a base plate is placed horizontally and a saw blade protrudes from its lower surface. Therefore, the base plate comes into contact with the upper surface of the workpiece, and the saw blade cuts into the inside from the upper surface of the workpiece.

  The guide tool is arranged below the base plate and has a U-shaped cross section in which two side plates are connected by a top plate. By sandwiching the workpiece into the guide tool, the guide tool is arranged along the side surface of the workpiece. Can move only in the direction. The top plate is in contact with the lower surface of the base plate, and also in contact with the upper surface of the workpiece during work. Further, the side plate extends in parallel with the direction in which the saw blade advances during operation, and sandwiches the workpiece between the two side plates. Therefore, the space between the two side plates is the same width as the workpiece. However, care should be taken so that the friction between the workpiece and the guide does not increase excessively. In the present application, “advancing direction of the saw blade” means a direction in which the entire electric circular saw including the saw blade travels during work.

  The top plate is provided with a window portion into which the saw blade enters, and the saw blade enters between the two side plates. The fixing tool is for integrating the guide tool with the electric circular saw, and its specific configuration is free. However, the fixing tool shall be able to separate the guide tool from the electric circular saw as required. An example of a fixing tool is a simple bolt. After a block with a female thread is welded to the outer surface of the side plate, a bolt is inserted from the electric round saw toward this female thread and tightened. The tool is fixed.

  The side plate has an important function of sandwiching the workpiece and determining the positional relationship between the saw blade and the workpiece. If the extension of the side plate is short, it is expected that the workpiece cannot be stably sandwiched and vibrations generated in the workpiece cannot be suppressed. Therefore, in the present invention, the extension of the side plate is set to be equal to or larger than the diameter of the saw blade so that the workpiece can be easily inserted. In addition, about a top plate, if there is no problem in intensity | strength etc., it can decide freely.

  In this way, by using a U-shaped cross-section guide tool composed of a top plate and a side plate and sandwiching the workpiece therein, the guide tool can move only in the direction along the side surface of the workpiece. Therefore, compared with the conventional simple guide, the positional relationship between the saw blade and the workpiece can be strongly restrained, and the cutting line generated by the rotating saw blade is not curved and is parallel to the side surface of the workpiece. It becomes a straight line. Note that when the saw blade is passed through the lower surface of the workpiece, the workpiece is cut, but when not penetrated, a groove is formed.

  The distance between the two side plates is determined in accordance with the width of the workpiece, and the distance between the saw blade and the side plate is also determined in accordance with the position where the cutting operation and the grooving are performed. Therefore, a guide tool is manufactured each time according to a workpiece. In addition, the material and manufacturing method of the guide are free as long as there is no problem in strength and safety, but in many cases, a single steel plate is bent at two locations to form a U-shaped cross section.

  The invention described in claim 2 aims to ensure versatility, and an adjustment plate extending in the same direction as the side plate is arranged on the inner surface of the side plate. The invention described in claim 1 is characterized in that the workpiece is sandwiched between the two side plates and the workpiece is restrained. Therefore, the interval between the inner surfaces of the side plates must be matched to the width of the workpiece. In contrast, in the present invention, the adjustment plate is attached to the inner surface of the side plate, so that the inside interval can be freely changed, and the difference in the width of the workpiece can be absorbed.

  The adjustment plate is a plate that extends along the side plate, and is detachable from the side plate. This adjustment plate can also be attached only to one side plate. Furthermore, by using a plurality of adjusting plates having different thicknesses, it is possible to deal with workpieces having various widths, and it is possible to adjust the cutting position of the saw blade, thereby ensuring versatility.

  According to a third aspect of the present invention, there is provided an electric circle comprising: a disk-shaped saw blade that cuts the upper surface of a workpiece; an electric motor that drives the saw blade; and a base plate placed on the upper surface of the workpiece. A movable shaft to be inserted into a shaft hole provided in the base plate, a pair of holding tools that sandwich the side surface of the workpiece and extend along the traveling direction of the saw blade, A fixing tool for integrating the movable shaft with the base plate, and the shaft hole extends in the rotational axis direction of the saw blade and holds the movable shaft in a slidable manner. A holding tool is attached in the vicinity of the end of the possible shaft so as to face each other and has an extension of about the diameter of the saw blade, and the pair of holding tools tightens the fixing tool to the base plate. Special feature It is a guide member to be.

  The guide device according to the present invention is characterized in that it can be displaced within a certain range with respect to the base plate, and can process two rows of grooves without reversing the electric circular saw 180 degrees during the operation. The basic shape of is the same as that described so far. However, the guide tool is composed of a pair of left and right holding tools, a movable shaft that integrates the left and right holding tools, and a fixing tool that can regulate the displacement of the movable shaft, and the movable shaft can be displaced with respect to the base plate. Retained.

  The movable shaft is a rod-shaped member extending in the direction of the rotation axis of the saw blade, and is inserted into a shaft hole provided in the base plate and can be displaced in the axial direction. Therefore, the shaft hole has a shape that can hold the movable shaft slidably without loosening. Of course, since a general-purpose base plate does not have a shaft hole, it is necessary to make a special base plate or to modify a general-purpose object. In any case, a certain protruding piece is provided on the flat base plate, and an axial hole is often formed in the protruding piece.

  The sandwiching tool is for sandwiching the side surface of the workpiece, plays the same role as the side plate of claim 1, and is used as a pair of left and right. Furthermore, in order to sandwich the workpiece stably, the extension is equal to or larger than the diameter of the saw blade. The left and right holding tools are integrated by a movable shaft, one holding tool is fixed near one end of the moving shaft, the other holding tool is fixed near the other end, and the holding tools are fixed to each other. Face each other and sandwich the workpiece between them. Therefore, the interval between the left and right holding tools is made to match the width of the workpiece. Note that the holding tool is disposed in the vicinity of both the left and right side surfaces of the base plate, and develops on both the upper surface side and the lower surface side of the base plate in consideration of the work piece and the movable shaft.

  The fixing tool temporarily restricts the displacement of the movable shaft and integrates the movable shaft and the base plate. Therefore, the fixing tool has a structure in which it is held on the base plate in some form and can come into contact with the movable shaft. A specific example of the fixing tool is a simple bolt. In order to insert the bolt, a female screw is provided on the base plate so as to face the side peripheral surface of the movable shaft. When the bolt is inserted into the female screw and tightened, the tip of the bolt presses the movable shaft, and the movable shaft and the base plate are integrated. When the bolt is loosened, the movable shaft can be displaced again.

  As described above, the guide tool is constituted by the pair of left and right holding tools, the movable shaft that integrates the left and right holding tools, and the fixing tool that can regulate the displacement of the movable shaft, and the holding tool can be formed from the saw blade. After adjusting the distance to the workpiece, by integrating the holding tool and the base plate with the fixing tool, the saw blade can be brought into contact with any position of the workpiece to perform the groove processing. In addition, it is preferable to use two or more movable shafts in order to ensure stability. Moreover, it is preferable to use one fixing tool for one movable shaft.

  During actual work, displace the holding tool in either the left or right direction, press it against the side of the base plate, etc., integrate the movable shaft and the base plate with the fixing tool, and then sandwich the workpiece with the holding tool. Machining a row of grooves. Next, after loosening the fixing tool once and displacing the holding tool in the opposite direction, a further row of grooves is processed. By setting it as such a procedure, when a groove | channel is processed, the advancing direction of an electric round saw becomes the same, and it is not necessary to reverse an electrical round saw 180 degrees in the middle. Therefore, an unreasonable posture is not imposed during work, and the discharge of chips is suppressed in the same direction, improving the work environment.

  The invention according to claim 4 is for improving the convenience of the guide tool, and the holding tool is integrated with the movable shaft by the pressing tool, and each holding tool loosens the pressing tool. Displaceable with respect to the movable shaft. Although the movable shaft and the holding tool can be completely integrated by welding or bonding, a structure in which both can be integrated as necessary using a pressing tool as in the present invention can also be used. As a result, the interval between the left and right holding tools can be freely adjusted, and workpieces of various widths can be sandwiched without gaps, further improving versatility.

  The pressing tool comes into contact with the movable shaft from the holding tool to integrate both. A specific example of the pressing tool is a simple bolt that is inserted into the holding tool, and the tip of the pressing tool presses the moving shaft, thereby integrating the moving shaft and the holding tool. As a matter of course, the female screw to be screwed with the bolt is provided at a position facing the side peripheral surface of the movable shaft. By loosening the bolt, the holding tool can be displaced again. Another example of the pressing tool is a nut. A male screw that is paired with the nut is formed at the end of the movable shaft, and the holding tool can be sandwiched between two nuts.

  The invention according to claim 5 is also for improving the convenience of the guide tool, and the movable shaft is provided with a limiter capable of regulating the displacement range of the holding tool by contacting the end surface of the shaft hole. It is characterized by. As described above, the distance from the saw blade to the holding tool can be freely adjusted by displacing the movable shaft. The present invention is intended to simplify the adjustment work, and a limiter is attached to the movable shaft and brought into contact with a base plate or the like, thereby restricting the displacement range of the holding tool.

  The limiter is a mass attached to the movable shaft, and regulates the displacement range of the movable shaft by contacting the end face of the shaft hole provided in the base plate. It should be noted that the limiter is not simply integrated with the movable shaft, but has a structure in which the limiter is integrated as necessary with screws or the like, and its position can be adjusted each time. In many cases, two limiters are attached to a single movable shaft so that the limiter can function in either the pushing direction or the pulling direction.

  By attaching the limiter in this way and adjusting its fixed position before work, when the holder is displaced to the left or right, it is only necessary to bring the limiter into contact with the base plate, etc., from the saw blade to the holder. The distance becomes a predetermined value. Therefore, the operation of displacing the holding tool to a predetermined place becomes extremely simple, the time and labor required for processing the two rows of grooves can be reduced, and the productivity is improved. Moreover, various conditions can be met by displacing the limiter with respect to the movable shaft.

  As in the first aspect of the invention, by attaching a guide tool composed of a top plate and a side plate to the electric round saw, the workpiece can be sandwiched in the guide tool without any gap. Therefore, at the time of work, the guide tool moves without being shaken along the side surface of the workpiece, and the cutting line formed by the saw blade becomes straight without being curved. Therefore, the electric round saw can be used for cutting a member for which aesthetics are to be taken into account and for groove processing for inserting a metal fitting.

  As described in the second aspect of the present invention, by arranging an adjustment plate extending in the same direction as the side plate on the inner surface of the side plate, the interval in the guide can be freely changed. Therefore, one guide can handle workpieces of various widths, and the cutting position of the saw blade can be adjusted to ensure versatility.

  As in the third aspect of the invention, the guide is constituted by the movable shaft, the fixing tool, and the pair of left and right holding tools, the movable shaft is inserted into the shaft hole of the base plate, and in the vicinity of the end of the movable shaft, By attaching a holding tool that sandwiches the work piece, and further allowing the displacement of the movable shaft to be regulated by the fixing tool, after adjusting the distance from the saw blade to the holding tool, the holding tool is integrated with the base plate. be able to. Therefore, it is possible to perform grooving at any position on the workpiece according to the distance between the left and right holding tools, and it is excellent in convenience.

  When processing the two rows of grooves on the end face of the workpiece with this guide, before finishing the first row of grooves and processing the second row of grooves, by displacing the holding tool in the left-right direction, In any of the two rows of grooves, the traveling direction of the electric circular saw during processing can be made uniform. Therefore, it is not necessary to reverse the electric circular saw 180 degrees in the middle of the work, the direction of the grip is always constant, an unreasonable posture is not imposed, and the workability is excellent. Furthermore, since the chips are discharged in the same direction, the subsequent cleaning work can be carried out smoothly.

  As in the invention described in claim 4, by using a pressing tool and having a structure in which the movable shaft and the holding tool can be integrated as required, the right and left holding tools can be adjusted according to the width of the workpiece. The interval can be adjusted freely. Therefore, it is possible to perform grooving by sandwiching workpieces of various widths with a holding tool.

  As described in claim 5, by attaching a limiter to the movable shaft and adjusting its fixed position in advance, after the limiter is brought into contact with the end face of the shaft hole, etc., the fastening tool is simply tightened. The distance from the blade to the holding tool can be set to a predetermined value. Therefore, during the work, the position adjustment of the holding tool becomes very simple, and when performing two rows of grooves on a large number of workpieces, time and labor can be greatly reduced.

It is a perspective view which shows the example of a shape of the guide tool by this invention. It is a perspective view of the state which integrated the electric round saw shown in FIG. 1 and a guide. It is a perspective view which shows the process in which a groove | channel is formed in a workpiece using a guide tool. FIG. 4 is a perspective view showing a process of forming a second row of grooves by inverting the electric circular saw after FIG. 3. It is a perspective view which shows the case where the workpiece in which the groove | channel of two rows was formed is used as a horizontal member. It is a perspective view which shows the form which has arrange | positioned the adjustment board in the guide tool. It is a perspective view which shows the guide tool which can adjust the distance from a saw blade to a holding tool by integrating the left and right holding tools which pinch | interpose a workpiece with a movable shaft. It is a perspective view of the state which built the guide tool of FIG. 7 in the electric circle saw. It is a perspective view which shows the process in which a groove | channel is formed in a workpiece with the guide tool of FIG. FIG. 10 is a perspective view illustrating a process of forming the second row of grooves by displacing the guide tool after FIG. 9. It is a perspective view of the structure which attached the cylindrical limiter to the movable shaft, and controlled the displacement range of the holding tool. FIG. 12 is a perspective view showing a state in which the distance between the left and right holding tools is widened and the position of the limiter is changed while diverting the guide tool of FIG. 11 as it is. It is a perspective view which shows the to-be-processed object which formed the groove | channel of 2 rows with the guide tool of FIG. 11 and FIG. It is a perspective view which shows the basic composition of a general electric round saw.

  FIG. 1 shows an example of the shape of a guide 11 according to the present invention. The guide 11 is integrated with the electric round saw 51 and is used for cutting work or grooving of the workpiece W. The electric round saw 51 is used without modifying a commercially available product, and is composed of a base plate 53, an electric motor 54, and the like, and can be equipped with a disk-shaped saw blade 52. The outer periphery of the mounted saw blade 52 is covered with a cover 56 that prevents scattering of chips and the like, and the electric motor 54 is arranged concentrically with the saw blade 52. The base plate 53 is a flat part that becomes the base of the electric circular saw 51 and is in surface contact with the workpiece W to stabilize the saw blade 52 during work.

  The electric motor 54 and the cover 56 are integrated, and the cover 56 is attached to the base plate 53 via a hinge 57. The hinge 57 supports the cover 56 in a swingable manner, and the amount of protrusion of the saw blade 52 from the lower surface of the base plate 53 can be freely adjusted. The actual electric circular saw 51 has a movable cover 56 to improve safety, and a hinge 57 has a lock mechanism, but these are not directly related to the present invention. Therefore, illustration etc. are omitted. In addition, a grip 55 is provided on the side peripheral surface of the electric motor 54. During the operation, a force is applied to the grip 55 so that the whole is advanced along the upper surface U while the base plate 53 is brought into close contact with the workpiece W.

  Guides 58 are provided at two locations on the front and rear sides of the base plate 53. The guide 58 has a simple plate shape, and conventionally, the electric circular saw 51 is moved linearly by bringing the guide 58 into contact with the side surface S of the workpiece W. However, the guide 58 may be separated from the side surface S due to an external force during work, and the cutting line may be curved. The guide 58 in the figure is fixed to the tip of an L-shaped slider 60, and the slider 60 can be moved in the width direction of the base plate 53 by loosening the butterfly screw 61, from the saw blade 52 to the guide 58. Can be adjusted freely.

  The guide 11 has a U-shaped cross-section obtained by bending a steel plate at two locations, and is composed of two side plates 15 arranged in parallel, a top plate 13 connecting the upper ends of the side plates 15, and the like. It integrates with the electric circular saw 51 via Further, a rectangular block 17 is attached to the outer surface of one side plate 15 by welding, and a female screw 18 for screwing the fixture 19 is formed at the approximate center of the block 17. The guide 58 is provided with a round hole 59 for inserting the fixture 19. When the guide tool 11 is integrated with the electric circular saw 51, the side surfaces of the guide 58 and the block 17 are brought into close contact with each other, and then the fixing tool 19 is inserted from the round hole 59 toward the female screw 18.

  The dimensions of each part are determined so that the top plate 13 contacts the lower surface of the base plate 53 when the guide 11 and the electric circular saw 51 are integrated. The side plate 15 extends in parallel with the side surface of the saw blade 52, and the saw blade 52 enters between the two side plates 15. Therefore, the top plate 13 is provided with a window portion 12. It is preferable that the window 12 has a certain size for adjusting the position of the guide 11 and preventing interference with the cover 56.

  The workpiece W is a bar having a rectangular cross section, and the width thereof (the direction connecting the wide surfaces among the four side surfaces of the workpiece W) is equal to the interval between the inner surfaces of the two side plates 15. . Therefore, when the guide tool 11 sandwiches the vicinity of the upper surface U of the workpiece W, the inner surface of the side plate 15 and the side surface S of the workpiece W are brought into close contact with each other, and the movement of the guide tool 11 is restricted. Can be moved linearly. Of course, the guide 11 is manufactured individually according to the shape of the workpiece W. In addition, in consideration of the case where the workpiece W is sandwiched between the guides 11, guide plates 16 are provided at both ends of the side plate 15 so as to spread in a C shape.

  FIG. 2 shows a state in which the electric circular saw 51 and the guide 11 shown in FIG. 1 are integrated. The electric round saw 51 and the guide tool 11 are integrated by two fixing tools 19, and the top plate 13 is in close contact with the base plate 53. For this reason, the load applied to the top plate 13 during operation is received by the base plate 53, and deformation of the guide 11 can be prevented. Further, the saw blade 52 protrudes from the window portion 12 and is positioned between the two side plates 15. In addition, when the slider 60 is moved, the guide 11 is also moved together, and the distance between the saw blade 52 and the side plate 15 can be adjusted.

  FIG. 3 shows a process of forming the groove G in the workpiece W using the guide tool 11. The guide tool 11 is integrated with the electric circular saw 51, and the guide tool 11 can sandwich the workpiece W without a gap. When the electric circular saw 51 is arranged in the vicinity of the workpiece W and is moved in the direction of the arrow in the drawing, the guide plate 16 first contacts the workpiece W, and eventually the two side plates 15 are moved. The workpiece W is sandwiched between the two. At that time, a downward force is applied to the grip 55 to bring the top plate 13 into close contact with the upper surface U. Subsequently, when the electric circular saw 51 is moved in the direction of the arrow, the saw blade 52 cuts the workpiece W.

  When the electric circular saw 51 passes completely through the workpiece W, a groove G as a cutting line is formed in the workpiece W as shown in the lower figure. When forming the groove G, the guide 11 sandwiches the workpiece W and can reliably prevent the saw blade 52 and the workpiece W from shaking, and the groove G has a straight shape with no curvature. . The position of the groove G can be adjusted with the slider 60.

  FIG. 4 shows a process of forming the second row of grooves G by inverting the electric circular saw 51 after FIG. In order to form one more groove G after forming one row of grooves G according to FIG. 3, the electric circular saw 51 is rotated 180 degrees without moving the workpiece W, which is opposite to FIG. Move in the direction. When the electric circular saw 51 completely passes through the workpiece W, a second row of grooves G is formed as shown in the lower figure. The grooves G have the same distance from the side surface S.

  FIG. 5 shows a case where the workpiece W in which the two rows of grooves G are formed is used as a horizontal member. This figure depicts a place where a horizontal member is connected to the side of an upright column in a wooden building, and a U-shaped metal fitting is interposed at the boundary between the column and the horizontal member. The horizontal member is obtained by horizontally arranging the workpieces W in which the two rows of grooves G in FIG. 4 are formed. After fixing the metal fitting to the side surface of the column with bolts and nuts, the metal fitting is inserted into the groove G of the horizontal member, and a drift pin is driven from the side surface of the horizontal member, thereby connecting the column and the horizontal member.

  Thus, the groove G for inserting the metal fitting needs to be processed in a straight line without being curved with a specified width in order to prevent loosening, and a dedicated processing machine is often used. However, by using the guide 11 according to the present invention, the linear groove G can be processed without difficulty even with a commercially available electric circular saw. As a result, the use of metal fittings is promoted, contributing to the improvement of the earthquake resistance of the building.

  FIG. 6 shows a form in which the adjustment plate 21 is arranged in the guide tool 11. The guide 11 shown in the figure is in an upside down posture. The guide 11 needs to sandwich the workpiece W, and a dedicated tool is used according to the shape of the workpiece W. However, by disposing such an adjusting plate 21, the interval in the guide 11 can be adjusted, and various workpieces W can be handled. The adjustment plate 21 shown in the figure has the same length and height as the side plate 15 and has the same function as the side plate 15. Further, a fixing screw 23 with a reduced overall length is used to attach the adjustment plate 21. In order to insert the retaining screw 23, a lateral hole 20 is provided in the side plate 15, and a screw hole 22 is provided in the side surface of the adjustment plate 21.

  Both ends of the adjustment plate 21 are wedge-shaped. Therefore, when the adjustment plate 21 is attached to the guide tool 11, the end of the adjustment plate 21 becomes a slope integrated with the guide plate 16, and the workpiece W can be smoothly sandwiched. In the figure, the adjustment plates 21 having the same shape are attached to the left and right sides of the guide tool 11, but only one of them can be used. Even when the adjustment plates 21 are attached to the left and right sides, the thickness can be individually changed. Thus, by changing the thickness and arrangement of the adjustment plate 21, it becomes possible to deal with various workpieces W, and versatility can be ensured.

  FIG. 7 shows the guide tool 31 in which the left and right holding tools 32 and 33 sandwiching the workpiece W are integrated by the movable shaft 41 so that the distance from the saw blade 52 to the holding tools 32 and 33 can be adjusted. ing. As in FIG. 1 and the like, the electric circular saw 71 in this figure has a motor 54 arranged concentrically with the saw blade 52, and a grip 55 is provided on the side peripheral surface of the motor 54. A cover 56 surrounding the saw blade 52 is attached to the base plate 73 via a hinge 57. However, the base plate 73 is not a simple plane, but rectangular projection pieces 75 are integrated on the upper surfaces of the four corners, and a shaft hole 76 for inserting the movable shaft 41 is formed therein.

  The sandwiching tools 32 and 33 are for sandwiching the workpiece W, but are not simple plates due to the balance with the base plate 73, and contact with the contact plate 35 that actually contacts the side surface S of the workpiece W. It has a crank-shaped cross section that includes a relay plate 37 that is located at the upper end of the plate 35 and extends in the horizontal direction, and an upper plate 34 that protrudes upward from substantially the center of the relay plate 37. Further, in order to stably sandwich the workpiece W, the extension of the holding tools 32 and 33 is larger than the diameter of the saw blade 52. Note that the holding tools 32 and 33 have the same shape on both the left and right sides and are arranged symmetrically with respect to each other. In addition, the guide plates 36 that are opened in the oblique direction are arranged at both ends of the contact plate 35 in consideration of the workpiece W sandwiched therebetween. Is provided.

  The movable shaft 41 is a round bar for attaching the holding tools 32 and 33 to the base plate 73, and an intermediate portion thereof is inserted into a shaft hole 76 on the base plate 73, and the holding tools 32 and 33 are located near the ends thereof. Fixed. Therefore, an inner hole 38 for inserting the movable shaft 41 is formed near both ends of the upper plate 34 of the holding tools 32 and 33. The inner diameter of the middle hole 38 is slightly larger than the outer diameter of the movable shaft 41, and the holding tools 32 and 33 can be displaced with respect to the movable shaft 41. However, at the time of use, it is necessary to integrate the movable shaft 41 and the holding tools 32 and 33, and the pressing tool 43 is used separately. The pressing tool 43 is a simple bolt and is screwed into a female screw 39 formed on the relay plate 37 so that the tip of the pressing tool 43 contacts the movable shaft 41. When the pressing tool 43 is tightened, the movable shaft 41 and the inner hole 38 come into close contact with each other, and the movable shaft 41 and the holding tools 32 and 33 are integrated.

  An intermediate portion of one movable shaft 41 is held by two shaft holes 76 arranged concentrically and can be displaced only in the axial direction. However, the fixing tool 42 is used so that the movable shaft 41 and the base plate 73 can be integrated as necessary. The fixing tool 42 is a general-purpose butterfly screw, and an upper surface of the protruding piece 75 is formed with a female screw 77 to be screwed therewith. The female screw 77 reaches the shaft hole 76, and the tip of the fixing tool 42 can be brought into contact with the movable shaft 41. Therefore, when the fixing tool 42 is tightened, the movable shaft 41 is integrated with the base plate 73. The fixing tool 42 is used only for one of the two protruding pieces 75 arranged concentrically.

  FIG. 8 shows a state in which the guide 31 shown in FIG. One movable shaft 41 is held by two projecting pieces 75 and can be displaced only in the axial direction. However, the movable shaft 41 is integrated with the base plate 73 by fastening the fixing tool 42 using a butterfly screw. Further, sandwiching tools 32 and 33 are inserted in the vicinity of the end of the movable shaft 41, and the pressing tool 43 (bolt) inserted from the lower surface of the relay plate 37 is tightened to integrate both. By loosening the fixing tool 42, the holding tools 32 and 33 can be displaced in the axial direction of the saw blade 52.

  In the upper figure in which the “guiding tool is moved to the upper left”, the lower right holding tool 33 is in contact with the side surface of the base plate 73, and the guiding tool 31 cannot be displaced further to the upper left. At this time, the relay plate 37 of the lower right holding tool 33 enters the lower surface of the base plate 73, and both are in surface contact. On the other hand, the upper left holding tool 32 is completely separated from the base plate 73. Next, in the lower figure in which the “guiding tool is moved to the lower right”, the upper left holding tool 32 is in contact with the side surface of the base plate 73, contrary to the upper figure. Cannot be displaced to the lower right.

  FIG. 9 shows a process of forming the groove G in the workpiece W by the guide tool 31 of FIG. In FIG. 9, the fixing tool 42 is tightened in a state where the “guiding tool is moved to the upper left” depicted in the upper part of FIG. 8, and the lower right holding tool 33 is in contact with the side surface of the base plate 73. The distance between the left and right holding tools 32 and 33 is adjusted so that the workpiece W can be sandwiched without any gaps. At this time, the saw blade 52 and the lower right holding tool 33 are close to each other, but the saw blade 52 and the upper left holding tool 32 are slightly separated from each other.

  When the electric circular saw 71 is arranged in the vicinity of the workpiece W and moved as a whole in the direction of the arrow in the figure, the guide plate 36 first comes into contact with the workpiece W, and eventually the workpiece W becomes two. The sheet is sandwiched between the contact plates 35. At that time, a downward force is applied to the grip 55 to bring the base plate 73 into close contact with the upper surface U. When the electric circular saw 71 is further moved in the direction of the arrow while maintaining this state, the saw blade 52 cuts the workpiece W.

  When the electric circular saw 71 passes completely through the workpiece W, a groove G as a cutting line is formed in the workpiece W as shown in the lower figure. At this time, the guide tool 31 sandwiches the workpiece W, can surely prevent the saw blade 52 and the workpiece W from shaking, and the groove G has a straight shape with no curvature.

  FIG. 10 shows a process of forming the second row of grooves G by displacing the guide 31 after FIG. After forming the row of grooves G in FIG. 9, when further forming a row of grooves G, the electric circular saw 71 is first returned to the original position without moving the workpiece W. After the fixing tool 42 is once loosened and the upper left holding tool 32 is brought into contact with the side surface of the base plate 73, the "guide tool is moved to the lower right" depicted in FIG. Then, the fixing tool 42 is tightened again.

  Thereafter, similarly to the first row of grooves G, when the electric circular saw 71 is moved in the direction of the arrow in the figure, finally two rows of grooves G are formed in the workpiece W as shown in the lower figure. . In any groove G, the distance from the adjacent side surface S is equal. In addition, in FIG. 9 and FIG. 10, the dimensions of each part are adjusted so that the two rows of grooves G can be formed at the correct positions by simply bringing one of the holding tools 32 and 33 into contact with the side surface of the base plate 73. .

  FIG. 11 shows a configuration in which a cylindrical limiter 45 is attached to the movable shaft 41 to restrict the displacement range of the holding tools 32 and 33. The limiter 45 has a cylindrical shape into which the movable shaft 41 can be inserted at the center, and is movable along the movable shaft 41. A female screw is formed on the upper surface of the limiter 45, and a small screw 46 can be screwed together. Then, by tightening the small screw 46, the tip thereof comes into contact with the movable shaft 41, and the limiter 45 can be integrated with the movable shaft 41. The limiter 45 is attached to only one of the two front and rear movable shafts 41. Furthermore, a limiter 45 is attached to one movable shaft 41 at two places between the protruding piece 75 and the upper plate 34.

  The left and right holding tools 32 and 33 are adjusted at intervals corresponding to the width of the workpiece W by once loosening the pressing tool 43. The limiter 45 is tightened with a small screw 46 after adjusting its position according to the groove G formed in the workpiece W. For this reason, as shown in the upper “move the guide tool to the upper left”, after the lower right limiter 45 is brought into contact with the end face of the shaft hole 76 of the projecting piece 75, the fastening tool 42 is tightened, and the work is immediately started. it can. Then, after the grooves G in the first row are processed, the fixing tool 42 is once loosened, and then the upper left limiter 45 protrudes contrary to the previous one, as shown in the figure below “moving the guide tool to the lower right”. When the fixing tool 42 is tightened again after being brought into contact with the piece 75, the operation in the second row can be started immediately.

  FIG. 12 shows a state where the guide tool 31 shown in FIG. 11 is used as it is, but the interval between the left and right holding tools 32 and 33 is widened, and the fixing position of the limiter 45 is also changed. In this way, by integrating the movable shaft 41 and the holding tools 32 and 33 with the pressing tool 43, the workpiece W having various widths can be smoothly sandwiched. Further, by attaching the limiter 45 and adjusting the fixing position in advance, the distance from the saw blade 52 to the holding tools 32 and 33 can be set to a predetermined value simply by bringing the limiter 45 into contact with the protruding piece 75 or the like. can do. This figure also shows a state in which the limiter 45 is brought into contact with the protruding piece 75, as in FIG.

  FIG. 13 shows a workpiece W in which two rows of grooves G are formed by the guide tool 31 of FIGS. 11 and 12. The width of the workpiece W is wider at the bottom, but the distance between the two rows of grooves G is wider at the top. In both the upper and lower workpieces W, the lower right groove G is processed in a state in which “the guide tool is moved to the upper left”, and the upper left groove G is “moves the guide tool to the lower right”. It is processed in the state of letting. Further, in both the upper and lower workpieces W, the two rows of grooves G are formed symmetrically with respect to the center. As described above, the movable shaft 41 and the holding tools 32 and 33 are integrated by the pressing tool 43, and the limiter 45 is attached to the movable shaft 41, whereby the grooves G and the like can be processed in various workpieces W. In addition, the width and depth of the groove G can be freely set, and a very shallow and wide groove G can be formed by using a dedicated saw blade.

11 Guide Tool 12 Window 13 Top Plate 15 Side Plate 16 Guide Plate 17 Block 18 Female Screw (of Block 17)
19 Fixing tool (bolt)
20 Horizontal hole 21 Adjusting plate 22 Screw hole 23 Retaining screw 31 Guide tool 32 Nipping tool (upper left in the figure)
33 Pinch (lower right in the figure)
34 Upper plate 35 Contact plate 36 Guide plate 37 Relay plate 38 Middle hole 39 Female screw (of relay plate 37)
41 Movable shaft 42 Fastening tool
43 Pressing tool (bolt)
45 limiter 46 machine screw 51 electric round saw 52 saw blade 53 base plate 54 motor 55 grip 56 cover 57 hinge 58 guide 59 round hole 60 slider 61 butterfly screw 71 electric round saw 73 base plate 75 projecting piece 76 shaft hole 77 female screw (projecting piece 75 of)
G groove S side (workpiece W)
U Top surface (of workpiece W)
W Workpiece

Claims (5)

A disk-shaped saw blade (52) for cutting the upper surface (U) of the workpiece (W);
An electric motor (54) for driving the saw blade (52);
A base plate (53) placed on the upper surface (U) of the workpiece (W);
Used integrally with an electric circular saw (51),
A top plate (13) in contact with the lower surface of the base plate (53);
A pair of side plates (15) sandwiching the side surface (S) of the workpiece (W) and extending along the traveling direction of the saw blade (52);
A U-shaped cross section consisting of
It can be attached to the electric round saw (51) through a fixture (19) such as a bolt,
The top plate (13) is provided with a window portion (12) into which the saw blade (52) enters,
The side plate (15) has an extension at least about the diameter of the saw blade (52).   The guide according to claim 1, wherein an adjustment plate (21) extending in the same direction as the side plate (15) is arranged on the inner surface of the side plate (15). A disk-shaped saw blade (52) for cutting the upper surface (U) of the workpiece (W);
An electric motor (54) for driving the saw blade (52);
A base plate (73) placed on the upper surface (U) of the workpiece (W);
It is used together with the electric round saw (71) comprising
A movable shaft (41) inserted into a shaft hole (76) provided in the base plate (73);
A pair of clamps (32, 33) sandwiching the side surface (S) of the workpiece (W) and extending along the traveling direction of the saw blade (52);
A fixture (42) for integrating the movable shaft (41) with the base plate (73);
Consists of
The shaft hole (76) extends in the direction of the rotation axis of the saw blade (52) and slidably holds the movable shaft (41).
The pair of holding tools (32, 33) are attached in the vicinity of the end of the possible shaft (41) so as to face each other, and have an extension of about the diameter of the saw blade (52),
The pair of holding tools (32, 33) cannot be displaced with respect to the base plate (73) by tightening the fixing tool (42).   The holding tool (32, 33) is integrated with the movable shaft (41) by a pressing tool (43), and each holding tool (32, 33) loosens the pressing tool (43). The guide tool according to claim 3, wherein the guide tool is displaceable with respect to the movable shaft (41).   The movable shaft (41) includes a limiter (45) capable of regulating a displacement range of the holding tool (32, 33) by contacting an end surface of the shaft hole (76) or the like. The guide according to claim 3 or 4, characterized in that

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