JP5311284B2 - Saver saw - Google Patents

Saver saw Download PDF

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JP5311284B2
JP5311284B2 JP2009063648A JP2009063648A JP5311284B2 JP 5311284 B2 JP5311284 B2 JP 5311284B2 JP 2009063648 A JP2009063648 A JP 2009063648A JP 2009063648 A JP2009063648 A JP 2009063648A JP 5311284 B2 JP5311284 B2 JP 5311284B2
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base
gear cover
fixing member
saver saw
portion
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JP2009063648A
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JP2010214519A (en
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正寛 藤原
直樹 田所
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日立工機株式会社
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Description

  The present invention relates to a saver saw that cuts wood, steel, pipes, etc. in the construction, equipment, renovation, demolition work, etc. of houses and buildings. A saver saw is sometimes called a reciprocating saw or a reciprocating saw.

  There is a saver saw as a reciprocating type cutting tool driven by an electric motor. As is well known, a saver saw is configured to reciprocate a reciprocating shaft (hereinafter referred to as a plunger) having a straight saw blade (hereinafter referred to as a blade) or the like attached to the tip thereof and to cut a material to be cut by the blade. A handle is formed on the saver saw, and an operator holds the handle with one hand and holds the main body with the other hand to perform a cutting operation. Normally, when cutting a material to be cut, it is common to work with the saver saw 101 main body upright such that the trigger is positioned upward as shown in FIG. Depending on the state of the material to be cut 36b and the like, as shown in FIG. 10 (2), the saver saw 101 main body may be cut upside down with the blade mounted on the plunger upside down.

  There are two types of saver saws: a plunger that is simply driven to reciprocate in a linear direction and a plunger that reciprocates and simultaneously swings in the vertical direction to force the blade into the material to be cut. There is one designed to improve cutting efficiency. Such a form in which the blade is driven and cut by a combined operation of reciprocating motion and rocking motion is called orbital cutting. For example, the technique of Patent Document 1 is known as a saver saw that simply cuts a plunger by reciprocating in a linear direction. In the cutting operation with a saver saw, a cutting reaction force is generated in the reciprocating direction of the blade, so that the base is usually cut while pressing the base attached to the main body of the saver saw 1 against the material to be cut. The state at the time of this cutting | disconnection is demonstrated using FIGS.

  In FIG. 11, a plunger 120 that reciprocates from the main body of the saver saw 101 protrudes, and a blade 135 is attached to the tip of the plunger 120. A base 124 extending in a direction substantially perpendicular to the blade 135 is attached to a tip of a base fixing member 125 attached so as to be movable along the reciprocating direction of the blade 135. At the time of the cutting operation, the base 124 is pressed against the material 136 to be cut so as to be in a direction substantially perpendicular to the reciprocating direction of the plunger 120. By performing the cutting operation while pressing the base 124 against the workpiece 136, the positions of the workpiece 136 and the blade 135 are kept constant and the workability is improved.

JP 2000-263504 A

  In the conventional technique, the base 124 is pivotally supported by the base fixing member 125 and can be swung by a certain angle so that the main body of the saver saw 1 is stabilized with respect to the material 136 to be cut. The setting angle of the base 124 at the time of cutting is important. For example, when the base 124 is pressed against the workpiece 136 at an angle θ1 (where θ1> 90 °) as shown in FIG. 12, that is, the base fixing member 125. When the base 124 is pressed against the workpiece 136 below the shaft support portion, an upward force F1 is generated on the main body via the base 124 due to a reaction force generated in the reciprocating direction of the blade 135. This force F1 acts in the direction in which the blade 135 moves away from the material 136 to be cut, causing a remarkable reduction in cutting efficiency.

  When the cutting of the workpiece 136 proceeds from this state and the base 124 is pressed against the workpiece 36 above the shaft support portion of the base fixing member 125, the angle formed by the base 124 is as shown in FIG. θ2 (θ2 <90 °) is established, and a downward force F2 is generated in the main body via the base 124 by a cutting reaction force generated in the reciprocating direction of the blade 135. This force F2 acts in the direction in which the blade 135 presses the material 136 to be cut, and the cutting efficiency is improved.

  The saver saw 101 is usually used with the blade 135 mounted downward on the plunger 120, but the blade 135 is turned upside down with respect to the main body of the saver saw 101 during cutting work in a narrow place such as near a wall or floor. (Blade 135 can be mounted in either the upper or lower direction). In this case, as shown in FIG. 10B, the work is often performed by inverting the main body of the saver saw 101. In this case, the angle of the base 124 with respect to the workpiece 136 also changes.

  When cutting with the saver saw 101 main body turned upside down, the angle formed by the base 124 is θ3 (θ3> 90 °) as shown in FIG. An upward force F3 is generated. This is because the material is pressed against the material to be cut 36 on the side farther than the shaft support portion of the base fixing member 125 (the lower side in the drawing). This force F3 acts in the direction in which the blade 135 moves away from the material 136 to be cut, resulting in a reduction in cutting efficiency. When cutting with the saver saw 101 main body upside down, unlike the state from FIG. 12 to FIG. 13, even if the cutting progresses, it is cut at the lower side away from the shaft support portion of the base fixing member 125. Since the positional relationship of being pressed against the material 136 does not change, as shown in FIG. 15, the relationship that the angle formed by the base 124 is θ3 (θ3> 90 °) does not change until the end of cutting. Therefore, an upward force F3 is always generated in the base 124, and the cutting efficiency is significantly reduced.

  As described above, in the conventional saver saw 101, when cutting with the blade 135 mounted upside down, the cutting efficiency is worse than normal, so the cutting is performed with the main body upside down. Improvement of the cutting efficiency when performing was desired.

  The present invention has been made in view of the above background, and an object of the present invention is to provide a saver saw that improves the cutting efficiency of work in a state where a blade is mounted upside down.

  Another object of the present invention is to provide a saver saw that is easy to use and can reduce the fatigue of the operator by changing the mounting state of the base member when the main body is used in an upright or inverted state. is there.

  Of the inventions disclosed in the present application, typical features will be described as follows.

  According to one aspect of the present invention, a motor, a housing that houses the motor, a blade that protrudes from the front of the housing, is driven to reciprocate by the motor, and can cut the material to be cut. In the saver saw having the pressed base member, the base member can be attached to the upper and lower positions of the housing. The saver saw has a motion converting member that converts the rotation of the motor into a reciprocating motion, the housing has a gear cover that houses the motion converting member, the base member can be attached to the gear cover, and the blade projects from the gear cover Configured as follows.

  According to another feature of the present invention, the base member has a plunger attached to the inside of the gear cover so as to be capable of reciprocating and having a blade attached to the tip thereof, and the base member is positioned on the upper side and the lower side of the gear cover with respect to the plunger. It was configured to be attachable to. The base member has a base fixing member fixed to the gear cover and a base on which a pressing surface against the material to be cut is formed, and the base is pivotally supported so as to be swingable at the tip of the base fixing member. The gear cover has a housing portion that houses the front end portion of the reciprocating plunger, and mounting portions for fixing the base fixing member are formed on the upper side and the lower side of the housing portion.

  According to another feature of the present invention, the base member has a base fixing member that is rotatably mounted relative to the gear cover, and a base on which a pressing surface against the material to be cut is formed. Is pivotally supported at the tip of the base fixing member so as to be swingable. The base fixing member includes an arm portion that extends in the reciprocating direction of the plunger and fixes the base, and a cylindrical portion that holds the arm portion and engages with a cylindrical groove formed in the gear cover.

  According to still another aspect of the present invention, the base fixing member is formed with a long hole, the upper and lower attachment portions of the gear cover are formed with screw holes, and the base fixing member has the long hole penetrated. The bolt is fixed by screwing it into either the upper or lower screw hole. The gear cover is provided with stopper means for fixing the cylindrical portion at a plurality of locations when the cylindrical portion is rotationally moved in the groove portion. This stopper means can be realized by a notch part formed in the circumferential direction of the cylindrical part, a hole part formed at an end part of the notch part, and a pin means penetrating the notch part.

  According to the first aspect of the present invention, since the base member can be attached to the upper and lower positions of the housing in the saver saw, the base of the base can be cut even when the saver saw body is in an upside down orientation. The long piece side can be pressed against the material to be cut, and the cutting operation can be performed efficiently.

  According to the invention of claim 2, since the base member can be attached to the gear cover and the blade protrudes from the gear cover, the base member can be moved to the upper and lower positions of the gear cover by changing the structure of the gear cover of the conventional device. Can be installed.

  In a saver saw having a base member for pressing against the material to be cut, the base member is constructed so that it can be attached to the upper and lower positions of the gear cover with respect to the plunger. Also in the work, it is possible to press against the material to be cut on the long side of the base, and the cutting work can be performed efficiently.

  According to the invention of claim 2, the base member has a base fixing member fixed to the gear cover and a base on which a pressing surface to the material to be cut is formed, and the base can swing at the tip of the base fixing member. Therefore, the mounting angle between the base fixing member and the base can be adjusted in accordance with the shape of the material to be cut.

  According to the invention of claim 3, the gear cover has a housing portion that houses the front end portion of the reciprocating plunger, and the mounting portions for fixing the base fixing member are formed on the upper and lower sides of the housing portion. The base member can be mounted on either the upper side or the lower side of the gear cover. As a result, the mounting position of the base member can be turned upside down during the cutting operation with the saver saw body in the reverse direction.

  According to the invention of claim 4, a long hole is formed in the base fixing member, a screw hole is formed in the upper and lower mounting portions of the gear cover, and the base fixing member has a bolt penetrating the long hole. Since it is screwed into either the upper or lower screw hole, the position adjustment of the base member in the front-rear direction is facilitated, and the base member can be easily attached and detached simply by removing the bolt.

  According to the invention of claim 5, since the base member has a base fixing member that is rotatably mounted relative to the gear cover and a base on which a pressing surface against the material to be cut is formed, the base member Without removing the gear from the gear cover, it can be rotated in the opposite direction. Further, since the base is pivotally supported at the tip of the base fixing member so as to be swingable, the mounting angle between the base fixing member and the base can be adjusted according to the shape of the material to be cut.

  According to the invention of claim 6, the base fixing member extends in the reciprocating direction of the plunger and fixes the base, and a cylinder that holds the arm and engages with a cylindrical groove formed in the gear cover. Therefore, the base member can be smoothly positioned on either the upper side or the lower side of the gear cover simply by rotating the cylindrical portion along the cylindrical groove.

  According to the invention of claim 7, since the gear cover is provided with stopper means for fixing the cylindrical portion at a plurality of positions when the cylindrical portion is rotated in the groove portion, the base member does not move during the cutting operation. It becomes possible to perform the cutting operation stably.

  According to the invention of claim 8, the stopper means includes a notch part formed in the circumferential direction of the cylindrical part, a hole part formed at an end part of the notch part, and a pin means penetrating the notch part. Therefore, the stopper can be operated and released by a simple operation without using a driver or the like.

  The above and other objects and novel features of the present invention will become apparent from the following description and drawings.

It is sectional drawing which shows the whole saver saw 1 which concerns on the Example of this invention. It is sectional drawing of the AA part of FIG. It is a figure which shows the base apparatus 23 of the saver saw 1 which concerns on the Example of this invention, (1) is a front view, (2) is a top view, (3) is a side view. It is a fragmentary sectional view which shows the shape of the gear cover 6 part of the saver saw 1 which concerns on the Example of this invention, (1) is a front view, (2) is sectional drawing of a BB part. 4 is a partial cross-sectional view showing a state in which a base device 23 is mounted on the lower side of the gear cover 6. FIG. It is a fragmentary sectional view showing the state where base device 23 was mounted on the upper side of gear cover 6 (the saver saw is inverted and the blade is also mounted upside down) It is a figure which shows the attachment condition of the base apparatus 23 which concerns on 2nd Example of this invention, (1) is a fragmentary sectional view, (2) is sectional drawing of CC section. It is a figure which shows the shape of the base fixing member 45 which concerns on the 2nd Example of this invention, (1) is a top view, (2) is a side view. It is a figure which shows the attachment condition of the base apparatus 23 which concerns on the 2nd Example of this invention, (1) is a fragmentary sectional view, (2) is sectional drawing of DD. It is a figure for demonstrating the cutting state in the state which inverted the conventional saver saw. It is principal part sectional drawing which shows the principle of the conventional saver saw. It is FIG. (1) for demonstrating the cutting state in the conventional saver saw. It is FIG. (2) for demonstrating the cutting state in the conventional saver saw. It is FIG. (1) for demonstrating the cutting state in the state which inverted the conventional saver saw. It is FIG. (2) for demonstrating the cutting state in the conventional saver saw.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, parts having the same function are denoted by the same reference numerals, and repeated description is omitted. Further, in this specification, description will be made assuming that the front-rear and up-down directions are the directions shown in FIG.

  FIG. 1 is a cross-sectional view showing an entire saver saw 1 according to an embodiment of the present invention. The electric motor 7 is built in a resin motor housing 2, and a handle 3 is connected to the rear of the motor housing 2. A switch 4 for controlling power supply to the motor 7 is built in the handle 3 having a D-shape when viewed from the side. A metal inner cover 5 and a gear cover 6 are provided in front of the motor housing 2 to accommodate the power transmission means. The motor housing 2, the inner cover 5, and the gear cover 6 constitute a main body housing portion that constitutes the saver saw 1. In this embodiment, the main body housing portion is divided into three components (2, 5, 6). However, these may be a single structure, or may be composed of two or four or more components. You may make it do. A front cover 15 made of an insulating heat insulating elastic member having a large friction coefficient is provided on a part of the outside of the housing portion. As a member of the front cover 15, for example, elastic rubber is used.

  A base device 23 for pressing and stabilizing the main body of the saver saw 1 against the material to be cut at the time of cutting work is attached to the front end side corresponding to the front of the gear cover 6. The base device 23 includes a base 24 and a base fixing member 25 that pivotally supports the base 24. The base fixing member 25 is attached to the gear cover 6 by a bolt 28 so as to be movable in the front-rear direction. The base device 23 can stabilize the main body of the saver saw 1 by working while pressing the base 24 against the material to be cut during the cutting work.

  A drive gear 8 is formed at the tip of the motor shaft 7a. The rotational motion of the motor shaft 7a is converted into the reciprocating motion of the plunger 20 by the motion converting means. The motion conversion means includes a second shaft 9 provided in parallel with the motor shaft 7a, a driven gear 10 that is non-rotatably attached to the second shaft 9, and an axial center of the driven gear 10 provided in front of the second shaft 9. An inclined shaft portion 9a having an angle of 14 °, a sub shaft 11 concentric with the axis of the driven gear 10, and a reciprocating plate 18 attached to the inclined shaft portion of the second shaft 9 via two bearings 17 are included. Composed.

  The motor 7 rotates the second shaft 9 via the reduction gears (8, 10). The rotational movement of the second shaft 9 is transmitted as the rotational movement of the inclined shaft portion 9 a, and the reciprocating plate 18 held by the two bearings 17 on the inclined shaft portion and the sub-center provided concentrically with the axis of the driven gear 10. The shaft 11 is rotated. A spherical portion 18b is formed at the tip of the swinging shaft portion 18a of the reciprocating plate 18, penetrates the hole portion of the plunger 20, and the spherical portion 18b engages with the inside of the hole portion so as to allow rolling. A cylindrical bearing metal 19 extending in parallel with the axial direction of the drive gear 8 is provided on a part of the inner peripheral surface of the gear cover 6, and the plunger 20 reciprocates in the axial direction through the bearing metal 19. Supported to be slidable. In front of the bearing metal 19, a seal ring 16 made of an O-ring is interposed between the inner peripheral surface of the gear cover 6 and the outer peripheral surface of the plunger 20, and encloses machine parts in the main body housing to prevent inflow of liquid and dust. doing.

  A blade holder 12 is provided at the front end of the plunger 20 and is configured such that the blade 35 can be attached and detached with one touch by operating a swingable knob 12a. The blade 35 can be mounted in the opposite direction. The blade 35 may be fixed by providing a blade fixing bolt on the blade holder 12 instead of attaching and detaching the blade 35 by one-touch operation of the knob 12a.

  2 is a cross-sectional view taken along a line AA in FIG. A roller shaft 21 is swingably attached to the plunger 20 through the plunger 20, and the roller shaft 21 can reciprocate in the front-rear direction integrally with the plunger 20. Further, swing rollers 21 a are swingably attached to both ends of the roller shaft 21. Inside the gear cover 6, a guide rail 22 having two raceway surfaces 22a and 22b is formed. The guide rail 22 is formed so as to extend in the axial direction (movement direction) of the plunger 20. Each track surface 22a, 22b extends in parallel to each other, and the distance between them is slightly larger than the outer diameter of the swing roller 21a. The swing roller 21 a is guided by the two raceway surfaces 22 a and 22 b and reciprocates integrally with the plunger 20. With these configurations, rotation of the plunger 20 in the circumferential direction is suppressed by the two raceway surfaces 22a and 22b via the roller shaft 21 and the two rollers 21a, and the blade 35 is prevented from falling (rotation about the moving direction). .

  Next, the shape of the base device 23 will be described with reference to FIG. FIG. 3 is a view showing the base device 23 of the saver saw 1 according to the embodiment of the present invention, wherein (1) is a front view, (2) is a top view, and (3) is a side view. As shown in FIG. 3 (1), when viewed from the front of the base 24, a substantially rectangular hole 24c for allowing the blade to penetrate is formed in the center. A flat flat portion 24a is formed around the hole 24c. The flat portion 24a serves as a reference surface (pressing surface) when the saver saw 1 body is pressed against the material to be cut. The shapes of the flat portion 24a and the hole 24c are arbitrary, and may be a base having a U-shape when viewed from the front, instead of a shape in which a hole is hollowed in the center.

  The base 24 is swingably attached to the base fixing member 25 via the pin 26 slightly below the center in the vertical direction. The base fixing member 25 is a plate-like member extending in the front-rear direction of the saver saw 1 as shown in the top view of (2). A flat portion 25 a extending in the front-rear direction is formed at the center of the base fixing member 25. Folded portions 25b that are folded upward are formed on both sides of the flat portion 25a in the width direction. The shape from the flat portion 25a to the folded portion 25b is a U-shaped shape whose cross section is opened upward as can be understood from the portion indicated by the dotted line in FIG. An elongated hole 25 c for allowing the bolt 28 to pass therethrough is formed in the flat portion 25 a of the base fixing member 25. The length of the long hole 25 c in the front-rear direction corresponds to the distance that the base fixing member 25 can slide relative to the gear cover 6. The width of the long hole 25c is set larger than the diameter of the bolt 28 to be penetrated and smaller than the head.

  In FIG. 3C, when the base 24 is viewed from the side, a folded portion 24b is formed from the flat portion 24a. The base 14 is formed by, for example, pressing a metal plate with sufficient strength. A through hole is provided slightly below the center of the folded portion 24b, and the base 24 is fixed to the base fixing member 25 by passing the pin 26 through the through hole. Therefore, when the vertical direction is viewed with respect to the pin 26, the long piece portion and the short piece portion are formed instead of being vertically symmetrical.

  FIG. 4 is a partial cross-sectional view showing the shape of the gear cover 6 portion of the saver saw 1 according to the embodiment of the present invention, where (1) is a front view and (2) is a cross-sectional view of the BB portion. The gear cover 6 has a substantially cylindrical recess (accommodating portion) 6e that accommodates the front end portion of the plunger 20 that reciprocates horizontally, and is manufactured by die casting of an aluminum alloy, for example. The characteristic feature of this embodiment is that the base fixing member 25 of the base device 23 can be attached not only to the lower side of the recessed portion 6e of the gear cover 6 as in the prior art but also to the upper side of the recessed portion 6e of the gear cover 6. It is the point comprised as follows. For this reason, mounting portions for the base fixing member 25 are formed on the upper and lower sides of the gear cover 6. A lower reference surface 6a that contacts the flat surface portion 25a of the base fixing member 25 is formed on the lower outer peripheral portion of the gear cover 6, and a vertical contact that contacts the inner surface of the folded portion 25b of the base fixing member 25 at both left and right ends thereof. A reference surface 6b is formed. The outer shape of the gear cover 6 from the lower reference surface 6 a to the vertical reference surface 6 b is a shape that matches the inner shape of the portion of the base fixing member 25 that extends in the longitudinal direction.

  Further, an upper reference surface 6c that contacts the flat surface portion 25a of the base fixing member 25 is formed on the outer peripheral portion on the upper side of the gear cover 6, and a vertical reference that contacts the inner surface of the folded portion 25b of the base fixing member 25 is formed on the left and right ends thereof. A surface 6d is formed. The outer shape of the gear cover 6 from the upper reference surface 6 c to the vertical reference surface 6 d is a shape that matches the inner shape of the portion of the base fixing member 25 that extends in the longitudinal direction.

  On the upper side and the lower side of the gear cover 6, screw holes 6 f and 6 g that are screwed with bolts 28 for fixing the base fixing member 25 to the gear cover 6 are formed. Female screws are formed in these screw holes 6f and 6g. As described above, the base fixing member 25 can be alternatively attached to either the lower side or the upper side of the gear cover 6. Further, since this attachment is performed by fastening the bolt 28, the base fixing member 25 can be easily removed simply by removing the bolt 28, and the operator can change the attachment position of the base device 23 according to the use situation. it can.

  FIG. 5 is a view showing a state in which the base device 23 is mounted on the lower side of the gear cover 6. In the state of FIG. 5, the base 24 is fixed to the lower screw hole 6 f of the base fixing member 25 with bolts 28. The screw 28 can be fixed to the screw hole 6f by deforming the front cover 15 made of elastic rubber with respect to the gear cover 6. In the state of this figure, the base fixing member 25 is positioned at the rearmost side, and the rear end of the base fixing member 25 is in contact with a stepped portion 6h (see FIG. 4) formed in the gear cover 6. For this reason, the protrusion amount of the base 24 from the gear cover 6 is minimized.

  FIG. 6 is a view showing a state in which the base device 23 is mounted on the upper side of the gear cover 6. In this figure, it should be noted that the main body of the saver saw 1 is positioned upside down and the blade 35 is mounted upside down with respect to the plunger 20. In the state of FIG. 6, the bolt 28 is removed from the state of FIG. 5, the base device 23 is removed from the main body of the saver saw 1, and is fixed upside down with the bolt 28 in the screw hole 6 g on the upper side of the base fixing member 25. According to this embodiment, the relationship between the blade 35 and the base member (θ3 <90 °) in the conventional cutting operation in the upright state described with reference to FIGS. That is, as the cutting operation proceeds, the position where the base 24 comes into contact with the material to be cut comes closer to the blade 35 than the shaft support portion. Therefore, as shown in FIG. 6, the angle θ3 formed by the base 24 and the base fixing member 25 is an acute angle. Therefore, the cutting reaction force generated in the reciprocating direction of the blade 35 generates a force in the same direction as the cutting direction with respect to the material to be cut via the base 24, thereby improving the cutting efficiency.

  As described above, according to the first embodiment, the angle θ formed by the base fixing member 25 and the base 24 becomes an acute angle when the blade is attached to the plunger in any of the vertical directions. Even in a cutting operation with the saver saw body facing upside down, it is possible to press against the material to be cut at an optimum angle, and the cutting operation can be performed efficiently. Even if the angle θ formed by the base fixing member 25 and the base 24 is not an acute angle, the same effect can be obtained if the moving direction of the blade 35 and the angle formed by the base 24 become acute by changing the configuration of the base member itself. It is done.

  Next, a second embodiment will be described with reference to FIGS. In the first embodiment, when the base device 23 is mounted upside down, it is necessary to remove it from the main body of the saver saw 1 and turn it upside down and fix it with the bolt 28 on the opposite side of the gear cover 6. In the second embodiment, when the base member is turned upside down, it is not necessary to remove the base member from the gear cover, and it is only necessary to rotate the saver saw 1 body by 180 degrees.

  FIG. 7A is a diagram illustrating a state where the main body of the saver saw 1 is erected, and the arm portion 45 a of the base fixing member 45 is located below the gear cover 30. The gear cover 30 is formed with a cylindrical groove 30a so as to cover a central axis perpendicular to the moving direction of the plunger 20, and the base device 43 is fixed by the groove 30a.

  FIG. 8 is a view showing the shape of the base fixing member 45, (1) is a top view, and (2) is a side view. The base fixing member 45 protrudes from the main body of the saver saw 1 and includes an arm part 45a for fixing the base 24 to the tip, and a cylindrical part 45b that holds the arm part 45a and engages with a cylindrical groove formed in the gear cover 30. Formed from two parts. A hole 45c is formed in the vicinity of the front end of the arm portion 45a to allow the pin 26 that pivotally supports the base 24 to pass therethrough. The cylindrical portion 45b is formed with a circumferential notch 45d formed by a rotation angle of 180 degrees in the circumferential direction. Stopper holes 45e for accommodating the stepped pins 31 are formed at both ends of the circumferential cutout 45d.

  Returning to FIG. 7, a cylindrical groove 30 a for accommodating the cylindrical portion 45 b of the base fixing member 45 is formed between the outer peripheral portion of the gear cover 30 and the front cover 53. On the lower side of the gear cover 30, a stepped pin 31 is provided as a stopper means for preventing the base fixing member 45 from falling forward and stopping the rotation of the base fixing member 45. The stepped pin 31 includes a pin head (medium diameter portion) serving as a knob portion, a cylindrical portion (large diameter portion) formed directly under the head of the pin and having the largest diameter, from the large diameter portion to the axial direction. It has three diameter portions of the main body portion (small diameter portion) of the extending pin, and the cylindrical portion 45b becomes non-rotatable when the cylindrical portion (large diameter portion) enters and fits into the stopper hole 45e. . A retaining ring 34 that holds the elastic body 32 is fixed to the tip of the stepped pin 31, and the stepped pin 31 is connected to the gear cover 30 by an elastic body 32 such as a spring provided between the retaining ring 34 and the inner wall of the gear cover 30. It is urged to move in the internal direction.

  To rotate the base member 45b, the operator removes the blade 35 and pulls the stepped pin 31 in the direction of the arrow 40 in FIG. 7, so that the small diameter portion of the stepped pin 31 is orthogonal to the cylindrical portion 45b. Become. Accordingly, the narrow diameter portion of the stepped pin 31 can enter the notch 45d, and the base member 45b can rotate with respect to the gear cover 30. The direction of rotation is counterclockwise when viewed from the front in FIG. By releasing the stepped pin 31 that has been pulled in the direction of the arrow 40 after rotating the base 24 by 180 degrees, the large diameter portion of the stepped pin 31 is accommodated in the stopper hole 45e, and the rotation direction of the base member 45 Movement is restricted. Thereafter, the blade 35 is mounted on the blade holder 12 with the blade 35 facing upside down. The base member 45 can be configured to be rotated without removing the blade 35 by making the width in the left-right direction of the base hole 24c larger than the width in the vertical direction of the blade 35. . FIG. 9 shows a state after the base member 45 is thus rotated. In this figure, the saver saw 1 body is in an upright state, but after that, the saver saw 1 body may be turned upside down.

  In the second embodiment, the base member 42 can be mounted on the saver saw 1 upside down with a simple operation, so that the base member 42 can be optimally set according to the work environment. For example, even in cutting with the main body of the saver saw 1 turned upside down, a cutting reaction force generated in the reciprocating direction of the blade 35 attached to the plunger 20 is used to cause the main body to be cut in the direction of the workpiece. It is possible to generate a force and improve the cutting efficiency. Further, in the second embodiment, when the base member 42 is rotated, it is not necessary to remove the base 24 and the stepped pin 31 from the main body of the saver saw 1, so that there is no possibility of losing these parts.

  As described above, according to the present embodiment, the blade can be mounted on the saver saw body in either the upper or lower direction by moving the center of the base swinging upward or downward according to the material to be cut. It becomes possible to perform cutting work efficiently.

  As mentioned above, although demonstrated based on the Example which shows this invention, this invention is not limited to the above-mentioned Example, A various change is possible within the range which does not deviate from the meaning. For example, in the above embodiment, the explanation was made using the saver saw that simply cuts the plunger by linear reciprocation, but the present invention can also be applied to a saver saw that performs so-called orbital cutting. Further, as long as the base member can be mounted on either the upper side or the lower side, it is not limited to the mounting method and the vertical movement method according to the configuration of the above-described embodiment, and may be realized by other configurations. Furthermore, although an electric motor is used in the present invention, the motor includes, for example, an air motor driven by compressed air, an engine driven by fuel, and the like. The electric motor of the saver saw according to the present invention can be constituted by these other motors.

DESCRIPTION OF SYMBOLS 1 Saver saw 2 Motor housing 3 Handle 4 Switch 5 Inner cover 6 Gear cover 6a Lower reference surface 6b (of gear cover) Vertical reference surface 6c (Gear cover) Upper reference surface 6d (Gear cover) Vertical reference surface 6e (Gear cover) 6), recessed portion 6f, 6g (gear cover) screw hole 6i, 6h (gear cover) step 7 motor 7a motor shaft 8 drive gear 9 second shaft 9a inclined shaft portion 10 driven gear 11 sub shaft 12 blade holder 12a knob 15 front Cover 16 Seal ring 17 Bearing
18 Reciprocating plate 18a Oscillating shaft portion 18b (of the reciprocating plate) Spherical portion 19 of the reciprocating plate 19 Bearing metal 20 Plunger 20a Mounting portion
21 Roller shaft 21a Swing roller 22 Guide rails 22a, 22b Track surface 23 Base device 24 Base 24a (base) flat part 24b (base) folded part 24c (base) hole
25 Base fixing member 25a Flat portion 25b (of the base fixing member) Folded portion 25c (of the base fixing member) Long hole 26 (of the base fixing member) Pin 27 Knob 28 Bolt
30 Gear cover 30a Cylindrical groove 31 Stepped pin 32 Elastic body 34 Retaining ring 35 Blade 36, 36a, 36b Material to be cut 43 Base device 45 Base fixing member 45a (Base fixing member) Arm 45b (Base fixing member) Cylindrical portion 45c (base fixing member) hole 45d (base fixing member) circumferential cutout 45e (base fixing member) stopper hole 53 Front cover 101 Saver saw 124 Base 135 Blade 136 Material to be cut

Claims (10)

  1. A motor and a housing for housing the motor;
    A blade that protrudes from the front of the housing, is driven to reciprocate by the motor, and can cut a material to be cut;
    Wherein possess and against which the base member pushed workpiece, and
    The blade is a saver saw that can be attached to the housing either vertically or vertically ,
    Saber saw, characterized in that said base member is attachable to the position of the upper and lower side of the housing.
  2. A motion converting member that converts the rotation of the motor into a reciprocating motion;
    The housing has a gear cover that houses the motion conversion member;
    The base member can be attached to the gear cover;
    The saver saw according to claim 1, wherein the blade protrudes from the gear cover.
  3. It is attached so that it can reciprocate inside the gear cover, and has a plunger to which a blade is attached at the tip,
    The saver saw according to claim 2, wherein the base member is attachable to the upper and lower positions of the gear cover with respect to the plunger.
  4. The base member has a base fixing member fixed to the gear cover, and a base on which a pressing surface against the material to be cut is formed,
    The saver saw according to claim 3, wherein the base is pivotally supported so as to be swingable at a tip of the base fixing member.
  5. The gear cover has a housing portion that houses a front end portion of the plunger that reciprocates,
    The saver saw according to claim 4, wherein mounting portions for fixing the base fixing member are formed on an upper side and a lower side of the housing portion.
  6. A slot is formed in the base fixing member,
    Screw holes are formed in the upper and lower mounting portions of the gear cover,
    The saver saw according to claim 5, wherein the base fixing member is fixed by screwing a bolt penetrating the elongated hole into either the upper or lower screw hole.
  7. The base member has a base fixing member that is rotatably mounted relative to the gear cover, and a base on which a pressing surface to the material to be cut is formed,
    The saver saw according to claim 3, wherein the base is pivotally supported by a tip of the base fixing member so as to be swingable.
  8.   The base fixing member includes an arm portion that extends in a reciprocating direction of the plunger and fixes the base, and a cylindrical portion that holds the arm portion and engages with a cylindrical groove formed in the gear cover. The saver saw according to claim 7, wherein the saver saw is constituted.
  9.   9. The saver saw according to claim 8, wherein the gear cover is provided with stopper means for fixing the cylindrical portion at a plurality of locations when the cylindrical portion is rotationally moved in the groove portion.
  10.   The stopper means is a notch part formed in a circumferential direction of the cylindrical part, a hole part formed at an end part of the notch part, and a pin means penetrating the notch part. The saver saw according to claim 9.
JP2009063648A 2009-03-16 2009-03-16 Saver saw Expired - Fee Related JP5311284B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009063648A JP5311284B2 (en) 2009-03-16 2009-03-16 Saver saw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009063648A JP5311284B2 (en) 2009-03-16 2009-03-16 Saver saw

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JP2010214519A JP2010214519A (en) 2010-09-30
JP5311284B2 true JP5311284B2 (en) 2013-10-09

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JP (1) JP5311284B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6164575B2 (en) * 2013-11-13 2017-07-19 日立工機株式会社 Work tools

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5249514Y2 (en) * 1972-12-30 1977-11-10
JPS6127624U (en) * 1984-06-27 1986-02-19
JPH0413515A (en) * 1990-04-27 1992-01-17 Matsushita Electric Works Ltd Power reciprocation saw
JP2596676Y2 (en) * 1992-09-28 1999-06-21 株式会社マキタ Fixed structure of the guide shoe in the reciprocating saw
JP4147673B2 (en) * 1999-03-12 2008-09-10 日立工機株式会社 Saver saw
JP2009241243A (en) * 2008-03-31 2009-10-22 Hitachi Koki Co Ltd Saber saw

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