Portable machine tool, and long ruler adapter for attachment to base of portable machining device

Abstract

To provide a portable machine tool comprising a wobble adjustment mechanism having been improved in usability; and a long ruler adapter for attachment to a base of the portable machine tool.SOLUTION: A portable machine tool or a long ruler adapter comprises: a guide groove extending in a longitudinal direction and configured for a projecting rim of a long ruler to be fitted therein; and a guide device for guiding progress of machining performed by the portable machine tool in the longitudinal direction so as to reduce a wobble in a width direction of the guide groove caused by a clearance between the projecting rim and the guide groove. The guide device comprises: a first claw protruding downward from above into the guide groove, and configured to be vertically displaceable; and a second claw configured to be displaceable between a first position of protruding into the guide from the lateral side and a position of being retreated in a direction separating away from the guide groove farther than the first position. The first claw and the second claw are configured so that the second claw is displaced from the second position toward to first position in response to an upward displacement of the first claw.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a portable processing machine and a long ruler adaptor for mounting to the base of the portable processing machine. [Background technology]

[0002] A cutting machine called a portable circular saw (hereinafter simply referred to as a circular saw) includes a base and a main body. The main body includes an electric motor and a generally circular cutting tool that is driven to rotate by the electric motor. The main body is disposed on one side of the base, while a part of the cutting tool protrudes beyond the base to the other side. When using such a cutting machine, a user brings the bottom surface of the base into contact with the material to be cut while the cutting tool is rotating, and moves the cutting machine forward. As a result, the cutting tool protruding beyond the base cuts the material to be cut.

[0003] To assist in such cutting work, a long ruler may be used together with the circular saw. For example, if a linear guide groove extending in the cutting direction is formed on the bottom surface of the base of the circular saw, a long ruler having a linear protrusion formed along the longitudinal direction that fits into the guide groove can be used. Specifically, the user positions the long ruler and the circular saw so that the protrusion of the long ruler fits into the guide groove of the base, and moves the circular saw in the cutting direction while maintaining this state. This makes it possible to cut the material to be cut in a straight line from the cutting start position to the cutting end position. If a linear guide groove extending in the cutting direction is not formed on the bottom surface of the base of the circular saw, a long ruler adapter with a guide groove can be attached to the base to perform the same work.

[0004] When using a long ruler as described above, a clearance is provided between the guide groove of the portable processing machine base or the long ruler adapter and the protrusion of the long ruler that fits into it to ensure sliding. If this clearance is too large, there is a risk of rattling between the two in a direction perpendicular to the cutting direction. Such rattling will impair the straight-line performance of the portable processing machine.

[0005] For this reason, techniques for adjusting the rattle have been developed. For example, the following Patent Document 1 discloses a technique for reducing the clearance between the guide groove of the base and the protrusion of the long ruler by using an elastic ring made of C-shaped rubber or the like. Specifically, a part of the side of the guide groove of the base is cut out, and the elastic ring is disposed adjacent to the protrusion through the cutout. A thumb screw is disposed in the center of the elastic ring. When the thumb screw is tightened, the elastic ring is pressed radially outward by the base of the thumb screw, and its diameter increases. As a result, the clearance between the elastic ring and the protrusion is reduced, and rattle can be reduced. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2006-334886 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, the above technology leaves room for improvement in terms of ease of use. Specifically, the more the thumbscrew is tightened, the greater the elastic force of the elastic ring, and the greater the operating load. It is desirable to have zero or very little clearance, but if the operating load increases, it is difficult to determine the point at which the elastic ring abuts against the ridge and the operating load increases. In addition, when the elastic ring abuts against the ridge, the fingertips holding the thumbscrew can feel a "knock" sensation, but in this case, even if the operation is stopped immediately, it is highly likely that the elastic ring has already pressed against the ridge. For this reason, it is difficult to optimally adjust the clearance. Such problems are not limited to circular saws, but are common to various portable processing machines used with long rulers, and long ruler adapters for mounting on the base of portable processing machines.

[0008] This specification discloses a portable processing machine or a long ruler adapter for mounting on the base of the portable processing machine. The portable processing machine or the long ruler adapter may include a guide groove extending in the longitudinal direction, into which a protrusion of the long ruler is fitted, and a guide device for guiding the progress of processing by the portable processing machine in the longitudinal direction so as to reduce rattling in the width direction of the guide groove caused by a clearance between the protrusion and the guide groove. The guide device may include a first claw portion protruding from above the guide groove downward into the guide groove and configured to be displaceable in the vertical direction, and a second claw portion configured to be displaceable between a first position protruding from the side into the guide groove and a second position retracted in a direction away from the guide groove from the first position. The first claw portion and the second claw portion may be configured such that the second claw portion displaces from the second position toward the first position in response to the upward displacement of the first claw portion.

[0009] Typically, the second claw does not protrude into the guide groove when in the second position. However, the second claw may protrude into the guide groove from the side when in the second position by a distance shorter than when in the first position. According to the above portable processing machine or long ruler adapter, when the second claw is in the second position and the protrusion of the long ruler begins to be fitted into the guide groove, the second claw does not interfere with the protrusion. Therefore, no work requiring a large operating load occurs, and the initial fitting procedure can be performed smoothly. Then, when the first claw abuts against the protrusion and the fitting procedure is further advanced, the first claw is displaced upward by the protrusion. As a result, the second claw is displaced from the second position to the first position. Therefore, the clearance in the width direction of the guide groove, which causes rattling, can be reduced. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view showing a state in which a circular saw according to one embodiment is used together with a long ruler. [Diagram 2] FIG. 2 is a perspective view of the base and guide device with other parts removed. [Diagram 3] FIG. 2 is a perspective view of the base and guide device with other parts removed. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] 5A to 5C are partial cross-sectional views showing the operation of the guide device. [Figure 8] 5A to 5C are partial cross-sectional views showing the operation of the guide device. [Figure 9] 5A to 5C are partial cross-sectional views showing the operation of the guide device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Representative and non-limiting examples of the present invention will now be described in detail with reference to the drawings. This detailed description is intended simply to provide those skilled in the art with details for implementing preferred examples of the present invention, and is not intended to limit the scope of the present invention. In addition, the additional features and inventions disclosed below can be used separately or together with other features and inventions to provide further improved devices, methods of making and using the same.

[0012] Furthermore, the combinations of features and steps disclosed in the following detailed description are not essential to the practice of the invention in its broadest sense, but are specifically described only to illustrate representative embodiments of the invention. Furthermore, the various features of the representative embodiments described above and below, and the various features of those described in the independent and dependent claims, do not have to be combined in the exact embodiments described herein, or in the exact order listed, to provide additional and useful embodiments of the invention.

[0013] All features described in the specification and / or claims are intended to be disclosed individually and independently of one another as limitations to the original disclosure and claimed particulars, apart from any configuration of the features described in the embodiments and / or claims. Furthermore, all numerical ranges and group or aggregate descriptions are intended to disclose their intermediate configurations as limitations to the original disclosure and claimed particulars.

[0014] In one or more embodiments, the guide device may include a shaft extending in the longitudinal direction. Each of the first claw and the second claw may be part of a single member configured to rotate about the shaft. This simple configuration allows the displacement force of the first claw to be efficiently transmitted to the displacement of the second claw. Therefore, even after the protrusion of the long ruler and the first claw come into contact with each other, the fitting operation can be continued without any significant operational resistance to the fitting.

[0015] In one or more embodiments, the shaft may be supported so as to be displaceable in the up-down direction. The guide device may include a first biasing member that biases the shaft downward. With this configuration, even if the first claw acts in a direction that attempts to displace the shaft further upward when the second claw is in contact with the ridge of the long ruler, the shaft can be displaced upward against the biasing force of the first biasing member. Therefore, the second claw does not press the side surface of the ridge excessively so as to impair the sliding ability between the ridge and the second claw.

[0016] In one or more embodiments, the locking mechanism may include a first biasing member that biases the shaft portion downward, and a second biasing member that biases the first claw portion in the rotational direction. With this configuration, the balance between the upward displacement of the first claw portion and the upward displacement of the shaft portion due to the rotation of the single member can be easily adjusted by adjusting the biasing forces of the first biasing member and the second biasing member. Therefore, the shaft portion can be more smoothly displaced so that the second claw portion does not press the side surface of the protrusion excessively.

[0017] In one or more embodiments, each of the first and second biasing members may be in the form of a spring, which makes it easy to adjust the biasing force of the first and second biasing members.

[0018] In one or more embodiments, the first biasing member may be in the form of a compression spring disposed above the shaft. This configuration makes effective use of dead space above the guide groove to achieve a compact layout. In other words, it is possible to avoid an increase in size due to the placement of the first biasing member. Note that "above the shaft" is not limited to being directly above the shaft, and may be any position in the vertical direction of the first biasing member that is higher than the vertical position of the shaft.

[0019] In one or more embodiments, the second biasing member may be in the form of a compression spring disposed above the first claw. This configuration allows for effective use of dead space above the guide groove to achieve a compact layout. Note that "above the first claw" is not limited to being directly above the first claw, but may be any position where the second biasing member is located above the first claw in the vertical direction.

[0020] In one or more embodiments, each of the first and second biasing members may be in the form of a spring. The spring load of the second biasing member may be less than the spring load of the first biasing member. With this configuration, the upward displacement of the first claw occurs preferentially over the upward displacement of the shaft portion until the second claw abuts against the side surface of the protrusion. This makes it possible to more efficiently operate the single member to abut the second claw against the side surface of the protrusion.

[0021] In one or more embodiments, the distance from the shaft to the first claw may be longer than the distance from the shaft to the second claw. With this configuration, the rotational force of the single member can be efficiently generated by the first claw. Furthermore, when the fitting operation is completed and the second claw is in contact with the side surface of the protrusion, even if a lateral force acts on the second claw, the second claw is unlikely to rotate. Therefore, the displacement of the second claw in the direction in which the clearance increases can be suppressed.

[0022] In one or more embodiments, the guiding device may include a housing that houses the single member. The housing may include at least two of a first spring seat for the first biasing member, a second spring seat for the second biasing member, a holding part that holds the shaft part, and a stopper that abuts against the single member to regulate the rotation angle of the single member. This configuration can reduce the number of parts and the number of steps required to assemble the portable processing machine or the long ruler adapter.

[0023] A portable circular saw (hereinafter simply referred to as a circular saw) 10 according to an exemplary embodiment will be described in more detail below with reference to the drawings.

[0024] In the following description, the side on which the user moves the circular saw when holding the circular saw 10 to cut a workpiece (the side on which cutting is advanced by the cutting tool 31 described later) is defined as the front side, and the opposite side is defined as the rear side. In addition, the side located vertically above is defined as the upper side, and the opposite side is defined as the lower side. Furthermore, the direction perpendicular to the front-rear direction and the up-down direction is defined as the left-right direction. In the left-right direction, the right side when looking from the rear side to the front side is defined as the right side, and the opposite side is defined as the left side.

[0025] 1, the circular saw 10 can be used together with a long ruler 100. The long ruler 100 has a protrusion 110 extending in the longitudinal direction thereof. The longitudinal direction of the long ruler 100 coincides with the front-rear direction.

[0026] As shown in FIG. 1, the circular saw 10 includes a base 20 and a main body 30. As shown in FIGS. 1 to 3, the base 20 has a generally rectangular shape when viewed in the up-down direction. The base 20 has a flat lower surface that can be placed on the ruler 100. The base 20 has a guide groove 21 near its left edge. The guide groove 21 extends in the front-rear direction from the front edge to the rear edge of the base 20. The guide groove 21 has a shape and size that allows the protrusion 110 of the ruler 100 to fit into it.

[0027] The main body 30 is basically disposed above the base 20. The main body 30 includes a cutting tool 31 configured to be rotatable about a rotation axis extending in the left-right direction. A portion of the cutting tool 31 protrudes downward from the base 20.

[0028] As shown in FIG. 1, a long ruler 100 is placed on the material to be cut, and then a circular saw 10 is placed on the long ruler 100 so that the protrusions 110 of the long ruler 100 fit into the guide grooves 21 of the base 20. The circular saw 10 is then moved forward, allowing the material to be cut in a straight line.

[0029] 2 and 3, a guide device 40 is disposed above the guide groove 21. Although described in detail below, the guide device 40 is provided to guide the progress of cutting by the circular saw 10 in the front-rear direction so as to reduce wobbling in the width direction (left-right direction) of the guide groove 21 caused by a clearance between the protrusion 110 and the guide groove 21. In this embodiment, the guide device 40 is disposed near the left and front edge of the base 20. However, the guide device 40 may be disposed at any position above the guide groove 21.

[0030] 3, the base 20 has a bottom surface and side surfaces that form the guide groove 21, and a cutout portion 22 that is continuous with the bottom surface of the base 20 in the left-right direction and is formed by partially cutting out the bottom surface of the base 20. The guide device 40 is partially housed in this cutout portion 22.

[0031] As shown in FIG. 4, the guide device 40 includes a guide member 50, a shaft portion 60, and a housing 80. As shown in FIG. 4, the housing 80 houses the guide member 50 therein. As shown in FIG. 4 and FIG. 5, the housing 80 has a substantially rectangular box shape and opens downward. A notch 82 is formed at the lower edge of the housing 80. The shape of the notch 82 matches the shape of the guide groove 21 of the base 20. As shown in FIG. 3, the housing 80 is arranged so that the guide groove 21 and the notch 82 are continuous. That is, when the circular saw 10 is used as shown in FIG. 1, the protrusion 110 of the long ruler 100 extends in the front-rear direction inside the notch 82.

[0032] As shown in Fig. 5, each of the front and rear side surfaces of the container 80 has a slot 81 (only the slot 81 on the front side surface is visible in Fig. 5). The two slots 81 penetrate the front and rear side surfaces in the front-rear direction, respectively. The longitudinal direction of the slots 81 coincides with the up-down direction.

[0033] As shown in FIG. 6, the guide member 50 includes a first claw portion 51, a second claw portion 52, a through hole 53, and spring seats 54, 55. As shown in FIGS. 3, 4, and 6, the first claw portion 51 and the second claw portion 52 face each other in the left-right direction and are located below the guide member 50. The first claw portion 51 protrudes downward, and the second claw portion 52 protrudes to the side (more specifically, to the right). The spring seats 54, 55 are disposed on the opposite side to the first claw portion 51 and the second claw portion 52. As shown in FIG. 4, a shaft portion 60 extending in the front-rear direction is inserted into the through hole 53 and the two long holes 81 of the container 80. The shaft portion 60 is held by the container 80 so as to be displaceable in the up-down direction along the long hole 81. The guide member 50 is rotatable around the shaft portion 60.

[0034] As shown in FIG. 7, spring seats 83 and 84 are formed on the upper inner surface of the housing 80. A first biasing member 71 and a second biasing member 72 are disposed between the guide member 50 and the housing 80. In this embodiment, the first biasing member 71 and the second biasing member 72 are in the form of a compression spring. The first biasing member 71 is disposed above the shaft portion 60 (through hole 53) in a state in which it is engaged with the spring seat 54 and the spring seat 83 (in FIG. 7, the shaft portion 60 in the through hole 53 is not shown). The first biasing member 71 is disposed in a compressed state, and constantly biases the shaft portion 60 downward.

[0035] The second biasing member 72 is disposed above the first claw portion 51 in a state of engagement with the spring seat 55 and the spring seat 84. The second biasing member 72 is disposed in a compressed state, and constantly biases the first claw portion 51 in the rotational direction (the direction in which the first claw portion 51 faces downward).

[0036] In this embodiment, the spring load of the second biasing member 72 is smaller than the spring load of the first biasing member 71. However, the spring loads of the first biasing member 71 and the second biasing member 72 may be set arbitrarily as long as they can realize the operation of the guiding device 40 described later. Furthermore, at least one of the first biasing member 71 and the second biasing member 72 may be modified into an arbitrary form as long as it can provide a biasing force in the above-mentioned direction. For example, the second biasing member 72 may be modified into a form of a torsion spring arranged around the shaft portion 60.

[0037] 7, the first claw portion 51, the second claw portion 52, and the through hole 53 (the rotation center of the shaft portion 60, i.e., the guide member 50) are positioned in the following order from the right: first claw portion 51, second claw portion 52, and through hole 53. Therefore, the distance from the shaft portion 60 to the first claw portion 51 is longer than the distance from the shaft portion 60 to the second claw portion 52.

[0038] In the above-described guiding device 40, the first claw portion 51 of the guiding member 50 can be displaced in the up-down direction by the guiding member 50 rotating about the shaft portion 60. The lowest position that the first claw portion 51 can take is determined by the abutment between the left side surface 56 of the guiding member 50 and the left inner side surface 85 of the container 80, as shown in FIG. 7 . In other words, the left inner side surface 85 functions as a stopper that regulates the rotation angle of the guiding member 50.

[0039] As shown in FIGS. 4, 7 to 9, the first claw portion 51 protrudes from above to below the guide groove 21 of the base 20, regardless of the rotation angle position of the guide member 50 and the vertical position of the shaft portion 60. On the other hand, the second claw portion 52 is displaceable between a first position and a second position. When the second claw portion 52 is in the first position, it protrudes from the side into the guide groove 21, and when the second position, it retreats in a direction away from the guide groove 21 from the first position. In this embodiment, when the second claw portion 52 is in the second position, it does not protrude into the guide groove 21. Therefore, hereinafter, the first position is also referred to as the protruding position, and the second position is also referred to as the non-protruding position. When the first claw portion 51 is in the initial position (the position shown in FIG. 7), the second claw portion 52 is in the non-protruding position. In contrast, when the first claw portion 51 is displaced upward due to rotation of the guide member 50, the second claw portion 52 is displaced from the non-protruding position toward the protruding position, and when the displacement amount of the first claw portion 51 exceeds a predetermined amount, it is displaced to the protruding position (see Figures 8 and 9).

[0040] Such a guide device 40 can reduce wobbling in the width direction (left-right direction) of the guide groove 21 by operating as follows. First, before the circular saw 10 is placed on the long ruler 100, the guide member 50 (the first claw portion 51 and the second claw portion 52) is in the initial position shown in FIG. 7. Then, when the user moves the circular saw 10 from above to below the long ruler 100 to a predetermined degree so that the protrusion 110 of the long ruler 100 fits into the guide groove 21 of the base 20, the first claw portion 51 comes into contact with the upper surface 111 of the protrusion 110 (see FIG. 7). At this point, the first claw portion 51 and the upper surface 111 are merely in contact with each other, and no force is applied from the upper surface 111 to the first claw portion 51.

[0041] Then, when the user brings the circular saw 10 even closer to the long ruler 100, the upper surface 111 presses the first claw portion 51 upward. This causes a moment to act on the guide member 50 in a direction that displaces the first claw portion 51 upward. As a result, the guide member 50 rotates about the shaft portion 60 against the biasing force of the second biasing member 72, and the first claw portion 51 is displaced (rotated) upward accordingly. Since the first claw portion 51 and the second claw portion 52 are part of the guide member 50, which is a single member, the second claw portion 52 also rotates from the non-projected position to the projected position shown in FIG. 7 together with the rotation of the first claw portion 51. Since the spring load of the second biasing member 72 is smaller than the spring load of the first biasing member 71, in this state, the rotation of the first claw portion 51 occurs preferentially, and the shaft portion 60 is hardly displaced in the vertical direction. Therefore, the second claw portion 52 can be efficiently displaced from the non-protruding position to the protruding position.

[0042] Then, when the user brings the circular saw 10 even closer to the long ruler 100 and the rotation of the guide member 50 continues, the second claw portion 52 starts to protrude into the guide groove 21 from the side of the guide groove 21. Then, when the rotation of the guide member 50 continues, the second claw portion 52 comes into contact with the side surface 112 of the protrusion 110, as shown in FIG. 8. At this point, the second claw portion 52 and the side surface 112 are merely in contact with each other, and no force is applied from the second claw portion 52 to the side surface 112. Up to this point, the second claw portion 52 does not interfere with the protrusion 110, so no work requiring a large operating load occurs, and the initial fitting procedure can be performed smoothly.

[0043] Then, when the user moves the circular saw 10 even closer to the long ruler 100 and places it in the final position, the guide member 50 rotates further, and as shown in FIG. 9, the shaft 60 displaces upward against the biasing force of the first biasing member 71 while the second claw portion 52 and the side surface 112 are maintained in contact with each other. In other words, since the second claw portion 52 is already in contact with the side surface 112, it cannot rotate any further, and the guide member 50 escapes upward. Since the guide member 50 escapes upward, the second claw portion 52 does not exert a large force laterally on the side surface 112, even though the second claw portion 52 and the side surface 112 are maintained in contact with each other.

[0044] According to such an operation of the guide member 50, the user can establish an appropriate contact relationship between the second claw portion 52 and the side surface 112 without excessive force acting thereon, simply by performing the simple operation of placing the circular saw 10 on the long ruler 100. As a result, it is possible to effectively reduce rattling caused by the clearance between the protrusion 110 and the guide groove 21 while ensuring good sliding properties relative to the protrusion 110. Moreover, in any process in which the guide member 50 is displaced from the initial position to the final position, only a force against the biasing force of the first biasing member 71 or the second biasing member 72 is required, and no large operating load is required.

[0045] Furthermore, according to the guide member 50, the first claw portion 51 and the second claw portion 52 are one piece of a single part, so that the operation of the first claw portion 51 and the operation of the second claw portion 52 can be achieved easily and with a simple configuration.

[0046] Moreover, according to the guide member 50, by adjusting the biasing forces of the first biasing member 71 and the second biasing member 72, it is easy to adjust the balance between the upward displacement of the first claw portion 51 and the upward displacement of the shaft portion 60 due to the rotation of the guide member 50. Furthermore, since compression springs are used as the first biasing member 71 and the second biasing member 72, the dead space above the guide groove 21 can be effectively utilized to achieve a compact layout.

[0047] In addition, since the distance from the shaft portion 60 to the first claw portion 51 is longer than the distance from the shaft portion 60 to the second claw portion 52, the rotational force of the guide member 50 can be efficiently generated by the first claw portion 51. In addition, even if a lateral force acts on the second claw portion 52 in the final position shown in Fig. 9, the second claw portion 52 is unlikely to rotate. Therefore, the displacement of the second claw portion 52 in the direction in which the clearance increases can be suppressed.

[0048] Furthermore, the container 80 can simultaneously fulfill the functions of holding the first and second biasing members 71 and 72 by the spring seats 83 and 84, respectively, holding the shaft portion 60, and restricting the rotation angle of the guide member 50 by contacting the guide member 50. This allows the number of parts to be reduced, and the number of assembly steps to be reduced.

[0049] Although several embodiments of the present invention have been described above, the above-mentioned embodiments are intended to facilitate understanding of the present invention and do not limit the present invention. The present invention may be modified or improved without departing from the spirit thereof, and the present invention includes equivalents thereof. In addition, any combination or omission of each form element described in the claims and specification is possible within the scope of solving at least a part of the above-mentioned problems or achieving at least a part of the effects.

[0050] For example, the above-described embodiment may be modified to any configuration in which the second claw portion is displaced from the non-protruding position to the protruding position in response to the upward displacement of the first claw portion. For example, instead of the guide member 50, a configuration in which a member having the function of the first claw portion 51 and a member having the function of the second claw portion 52 are interlocked may be employed.

[0051] Furthermore, when the second claw portion 52 is in the second position, it may protrude laterally into the guide groove 21 to an extent that does not interfere with the protrusion 110 of the long ruler 100.

[0052] Furthermore, the various embodiments described above are not limited to the circular saw 10, but can be applied to various portable processing machines, such as cutters, jigsaws, and routers, that have a base with a guide groove into which the protrusions of a long ruler are fitted. Furthermore, if the base of the portable processing machine does not have a guide groove, a long ruler adapter having a guide groove may be attached to the base. The various embodiments described above can also be applied to such a long ruler adapter.

[0053] The correspondence between each component of the above embodiment and each component of the present invention is shown below. However, each component of the embodiment is merely an example and does not limit each component of the present invention. The circular saw 10 is an example of a "portable processing machine". The guide groove 21 is an example of a "guide groove". The guide device 40 is an example of a "guide device". The guide member 50 is an example of a "single member". The first claw portion 51 is an example of a "first claw portion". The second claw portion 52 is an example of a "second claw portion". The shaft portion 60 is an example of a "shaft portion". The first biasing member 71 is an example of a "first biasing member". The second biasing member 72 is an example of a "second biasing member". The housing 80 is an example of a "housing". The spring seat 83 is an example of a "first spring seat". The spring seat 84 is an example of a "second spring seat". The long hole 81 is an example of a "holding portion". The left inner surface 85 is an example of a "stopper." [Explanation of symbols]

[0054] 10...Circular saw 20...Base 21...Guide groove 22...Notch 30...Main body 31...cutting tool 40...Guiding device 50...Guide member 51...First claw 52...Second claw 53...Through hole 54,55...Spring seat 56...Left side 60...Shaft 71...First biasing member 72...Second biasing member 80...Containment Unit 81...long hole 82...Notch 83,84...Spring seat 85...Left inner surface 100...Long ruler 110...projection 111...Top surface 112...Side

Claims

1. A portable processing machine or a long ruler adapter for mounting on a base of the portable processing machine, A guide groove extending in a longitudinal direction into which a protrusion of a long ruler is fitted; a guide device for guiding the progress of processing by the portable processing machine in the longitudinal direction so as to reduce wobbling in the width direction of the guide groove caused by a clearance between the protrusion and the guide groove; Equipped with The guide device includes a first claw portion that protrudes from above toward below into the guide groove and is configured to be displaceable in the up-down direction, and a second claw portion that is configured to be displaceable between a first position that protrudes laterally into the guide groove and a second position that is retracted in a direction away from the guide groove relative to the first position, The first claw portion and the second claw portion are configured such that the second claw portion is displaced from the second position toward the first position in response to an upward displacement of the first claw portion. Portable processing machine or long ruler adapter.

2. The portable processing machine or long ruler adapter according to claim 1, The guide device includes a shaft portion extending in the longitudinal direction, Each of the first and second prongs is part of a single member configured to rotate about the shaft. Portable processing machine or long ruler adapter.

3. The portable processing machine or long ruler adapter according to claim 2, The shaft portion is supported so as to be displaceable in the up-down direction, The guide device includes a first biasing member that biases the shaft portion downward. Portable processing machine or long ruler adapter.

4. The portable processing machine or long ruler adapter according to claim 3, The guide device includes a second biasing member that biases the first claw portion in a rotational direction. Portable processing machine or long ruler adapter.

5. The portable processing machine or long ruler adapter according to claim 4, Each of the first biasing member and the second biasing member is in the form of a spring. Portable processing machine or long ruler adapter.

6. The portable processing machine or long ruler adapter according to claim 3 or 4, The first biasing member is in the form of a compression spring disposed above the shaft portion. Portable processing machine or long ruler adapter.

7. The portable processing machine or long ruler adapter according to claim 4, The second biasing member is in the form of a compression spring disposed above the first pawl. Portable processing machine or long ruler adapter.

8. The portable processing machine or long ruler adapter according to claim 5, The spring load of the second biasing member is less than the spring load of the first biasing member. Portable processing machine or long ruler adapter.

9. The portable processing machine or long ruler adapter according to any one of claims 2 to 5, The distance from the shaft portion to the first claw portion is longer than the distance from the shaft portion to the second claw portion. Portable processing machine or long ruler adapter.

10. The portable processing machine or long ruler adapter according to claim 5, The guide device includes a housing that houses the single member, The container is a first spring seat for the first biasing member and a second spring seat for the second biasing member; A holding portion that holds the shaft portion; a stopper that restricts the rotation angle of the single member by contacting the single member; At least two of the following are provided: Portable processing machine or long ruler adapter.

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