JP2009241243A - Saber saw - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a saber saw capable of easily cutting in the case of cutting operation by moving the position of a base 12 in accordance with a material to be cut. <P>SOLUTION: The saber saw comprises a housing incorporating a motor, a reciprocating conversion mechanism for converting rotary motion of the motor to reciprocating motion of a plunger, a blade provided for the plunger and capable of cutting the material to be cut, and the base having a portion extending so as to spatially intersect the blade. The base has a second member extending almost in the reciprocating motion direction of the plunger from the housing, and a first member movable in the range wherein the first member spatially intersects the blade relative to at least the second member. The problem can be solved by the saber saw characterized in that an angle formed by the intersection of the first member before moving and the blade is almost equal to an angle formed by the intersection of the first member after moving and the blade. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a saver saw that cuts cutting materials such as wood, steel, and pipes in the construction, facilities, renovation, and demolition work of houses and buildings.

  There is a saver saw as an electric tool that causes reciprocation by the rotational force of a motor driven by electricity, and reciprocates a saw blade (hereinafter referred to as a blade) by the reciprocation. Saver saws are sometimes called electric saws or reciprocating saws. In the saver saw, a reciprocating shaft (hereinafter referred to as a plunger) having a blade attached to the tip is generally driven to reciprocate and cut by the blade. For example, see Patent Document 1 and Patent Document 2.

  FIG. 6 shows a conventional saver saw. The saver saw 101 has a housing 102 and a handle 104. A motor 103 is provided inside the housing 102. A reciprocating motion conversion mechanism 108 that reciprocates the plunger 109 by the rotation of the motor 103 is provided inside the housing. The plunger 109 reciprocates the blade 111 to cut the cutting material.

  In this case, as shown in FIG. 7, the cutting material W is cut while being guided by the base 112 by the saver saw 101. At this time, the plunger 109 and the blade 111 attached thereto are moved in the direction of the arrow R1. When moving to, it was to cut.

  The base 112 penetrating the blade 111 had a first member 112A and a second member 112B. The operator can move the base 112 in the axial direction of the plunger 109 by a mechanism (not shown), and can position the base 112 at a desired position. In addition, the first member 112A is rotatably held with respect to the second member 112B, and the first member 112A is second when the operator presses the cutting material W when cutting. The member 112B can be rotated.

JP 2007-090503 A Japanese Patent No. 3709748

  In the conventional saver saw, when cutting a large cutting material, the base 112A may not be able to guide the cutting material. In addition, some saver saw products have a blade mounted upside down, and in that case, the guide cannot be further guided by the base 112 of the saver saw.

  An object of the present invention is to solve the problems of the conventional saver saw as described above.

  The object is to provide a housing with a built-in motor, a reciprocating motion conversion mechanism for converting the rotation of the motor into a reciprocating motion of a plunger, a blade detachably provided on the plunger and capable of cutting a cutting material, and the blade. A saver saw having a base having a portion extending so as to intersect spatially, wherein the base extends at least from a first member that spatially intersects the blade, and is connected to the first member. And a second member, and the first member can be moved at least in a direction crossing the blade, and is achieved by a saver saw.

  When the first member that spatially intersects with the blade of the base is movable in the direction that intersects with the blade by the configuration of the saver saw according to the invention of claim 1, the cutting material is a large member. Can also be a compact saver saw with a base capable of guiding the cutting material.

  According to the construction of the saver saw according to the second aspect of the present invention, the first member of the base has the shaft portion, the second member has the elongated hole portion, and the shaft portion and the elongated hole portion are engaged. Since the first member can be locked at a predetermined position of the elongated hole portion, the first member can move in a direction intersecting the blade with a simple configuration. For this reason, it can be set as a compact saver saw with a simple structure.

  Since the shaft portion has the first position and the second position in the axial direction, the shaft portion is moved in the axial direction so that the shaft portion is moved in the axial direction. It can be set as the position of locking and non-locking with the long hole portion. For this reason, it can be set as the saver saw which a worker can move the 1st member to the 2nd member easily.

  Since the first member of the base is provided so as to be rotatable with respect to the second member, the operator presses the cutting material against the base. Thus, it is possible to provide a saver saw that is easy to use for an operator who can easily cut.

  The construction of the saver saw of the invention according to claim 5 enables the blade to be mounted at a position reversed 180 degrees with respect to the plunger. Therefore, even when the blade is mounted at the reversed position, the first of the base By moving the member in the direction crossing the blade, it is possible to provide a saver saw that can easily guide the cutting material.

  Hereinafter, the configuration of an embodiment of a saver saw according to the present invention will be described with reference to FIGS.

  FIG. 1 is a partial sectional front view of a saver saw according to the present invention. The saver saw 1 has a housing 2, and a motor 3 is built in the housing 2. The housing 2 includes at least one of a resin motor housing 2A for housing the motor 3 therein, a metal gear housing 2B for housing a reciprocating motion conversion mechanism 8 and the like to be described later, and the motor housing 2A and the gear housing 2B. And a front cover housing 2C made of rubber covering the portion. A handle 4 having a substantially “O” shape is connected to the motor housing 2A. The handle 4 is provided with a trigger 5 provided on the substantially inner peripheral surface of the “O” type. A power cord 6 having a plug (not shown) at one end is provided below the handle 4.

  A fan 3 </ b> B is provided on the output shaft of the motor 3 so as not to rotate by press-fitting. Further, a pinion 3A is provided on the output shaft. The pinion 3A is provided in the gear housing 2B, and the fan 3B is provided in the motor housing 2A. A gap 2A1 is provided between the motor housing 2A and the gear housing 2B so that the air in the housing can be discharged to the outside of the housing by the fan 3B.

  The pinion 3A meshes with an intermediate shaft gear 7A provided on the intermediate shaft 7 so as not to rotate by press-fitting. The motor output shaft and the intermediate shaft 7 are provided so as to be substantially parallel. On the intermediate shaft 7, an inclined shaft portion 7 </ b> B that is provided so as not to rotate with the intermediate shaft 7 is provided. The inclined shaft portion 7B has a portion inclined about 14 degrees with respect to the axial direction of the intermediate shaft 7. A reciprocating plate 8 is provided via a reciprocating bearing 8B so as to engage with the inclined shaft portion 7B. The inclined shaft portion 7B is rotatably connected to the reciprocating plate 8 via a reciprocating bearing 8B. The reciprocating plate 8 is provided with a spherical portion 8 </ b> A and is engaged with the plunger 9. The plunger 9 reciprocates by rotation of the intermediate shaft 7 through the inclined shaft portion 7 </ b> B, the reciprocating bearing and the reciprocating plate 8. A blade holding portion 10 is provided at the end of the plunger 9 on the side of the antispherical portion 8A, and the blade 11 is detachably held by a mechanism (not shown).

  A base 12 having a first member 12 </ b> A extending so as to intersect with the blade 11 is provided near the tip of the housing 2. The base 12 can move substantially in the axial direction of the plunger 9 and can be made immovable by the fixing member 12C.

  As shown in FIG. 1, the base 12 has a first member 12A and a second member 12B.

  FIG. 2 shows an enlarged front view of the base 12. The first member 12A includes a first member body 12A1, a holding portion 12A2, a rotation shaft 12A3, and a holding shaft 12A4. The first member main body 12A1 is rotatably held with respect to the holding portion 12A2 by a rotation shaft 12A3. The holding shaft 12A4 is provided on the holding member 12A2 so as to be movable in the axial direction.

  The second member 12B includes a shaft portion 12B1 extending in the substantially axial direction of the plunger 9 and an extending portion 12B2 extending in a direction substantially orthogonal to the shaft portion 12B1. The elongated portion 12B3 is provided with a long hole portion 12B3. The long hole portion 12B3 is provided with four large diameter portions 12B32 having a large width, and a small diameter portion 12B31 provided therebetween. The large diameter portion 12B32 and the small diameter portion 12B31 communicate with each other as shown in FIG.

  As shown in FIG. 2, the holding shaft 12A4 and the long hole portion 12B3 are engaged, and as shown in FIG. 3, the engagement position can be changed by the large diameter portions of the four long holes.

  4 and 5 are sectional views taken along line AA in FIG. The first member main body 12A1 is rotatably held by the holding member 12A2 by a rotation shaft 12A3. This is because a slight turning margin is provided between the turning shaft 12A3 and the first member body 12A1. The holding shaft 12A4 passes through the holding member 12A2 and the long hole portion 12B3. The holding shaft 12A4 has two protruding first and second protruding portions 12A41 and 12A42 extending in a direction orthogonal to the axis of the holding shaft 12A4. Between the first projecting portion 12A42 and the holding member 12A2, a spring 12A5 is provided that urges them in the direction of separating them. When the holding shaft 12A4 is separated by the urging force of the spring 12A5, the second projecting portion 12A42 can come into contact with the second member 12B, and the second projecting portion 12A42 and the second member 12B are in contact with each other. The first member 12A cannot move with respect to the second member 12B due to the frictional force caused by the surface contact between them.

  FIG. 5 shows a state in which the holding shaft 12A4 is moved in the axial direction. This is because the operator moves the holding shaft 12A4 in the axial direction against the urging force of the spring 12A5. The second protrusion 12A42 and the second member 12B are not in contact with each other. For this reason, since no force acts between the second projecting portion 12A42 and the second member 12B, the holding shaft 12A4 can move inside the elongated hole 12B3.

  Operation | movement of one Embodiment of the saver saw of this invention is demonstrated.

  When the operator operates the trigger 4 while holding the handle 4 and the front cover housing 2C with the plug (not shown) of the power cord 6 inserted into the outlet, the motor 3 is energized.

  When the motor 3 is energized, the motor 3 is rotated by the electric power. The rotation of the motor 3 causes the fan 3B, which is provided in a non-rotatable manner, to rotate in the motor 3. The air is taken into the housing 2 from an air inlet (not shown) of the motor, and the air taken in through the gap 2A1 of the housing Cooled and exhausted to the outside of the housing 2.

  The pinion 3A provided on the output shaft of the motor 3 is also rotated by the rotation of the motor 3. This rotation rotates the intermediate shaft gear 7A that meshes with the pinion 3A. Due to the rotation of the intermediate shaft gear 7A, the intermediate shaft 7 provided so that the intermediate shaft gear 7A cannot rotate rotates. Since the inclined shaft portion 7B is provided on the intermediate shaft 7 so as to be inclined with respect to the axial direction of the intermediate shaft, the reciprocating plate 8 attached to the inclined shaft portion 7B via the reciprocating bearing 8B is the axis of the intermediate shaft 7. Swing in the direction. By this swing, the reciprocating plate 8 and the plunger 9 engaged through the spherical portion 8A reciprocate. By this reciprocating motion, the blade 11 provided on the blade mounting portion 10 provided on the antispherical portion 8A side of the plunger 9 reciprocates.

  When cutting, the position of the base that spatially intersects the blade 11 is changed according to the size of the cutting material. When the cutting material is small, as shown in FIG. 2, the holding shaft 12A4 and the long hole portion 12B3 are positioned at the large diameter portion 12B32 positioned closest to the blade 11. When the cutting material is large, the holding shaft 12A4 is resisted against the biasing force of the spring 12A5 from the first position where the second protrusion 12A41 and the second member are in a state as shown in FIG. By moving the shaft portion in the axial direction, the shaft portion is moved in the elongated hole portion 12B3 in a state as shown in FIG. 5 without being locked between the holding shaft 12A4 and the second member 12B. The holding shaft 12A4 is moved in the axial direction to the second position. Then, for example, as shown in the state of FIG. 3, the holding shaft 12A4 and the long hole portion 12B3 are positioned on the large diameter portion 12B32 positioned farthest from the blade 11. In this case, the first member is in the state farthest from the blade. For this reason, the first member body 12A1 can be easily guided even when the cutting material is large. Since it is such a structure, it can suppress that the shape of a base becomes large in a state as shown in FIG. 2, for example, and it can be set as a compact saver saw. Further, since the holding shaft 12A4 and the elongated hole portion 12B3 are engaged, the first member can move with respect to the second member with a simple configuration. For this reason, it can be set as a compact saver saw. Further, since the holding shaft 12A4 has the first position and the second position as described above in the axial direction, the shaft portion is moved in the axial direction so that the shaft portion and the elongated hole portion are locked. And an unlocked position. For this reason, the saver saw which an operator can move a 1st member easily with respect to a 2nd member can be provided.

  FIG. 6 shows a state in which the blade 11 is attached to a position reversed 180 degrees by the blade holding unit 10. As described above, even when the blade is attached to the reverse position, the cutting material can be guided by moving the first member of the base 12. The conventional saver saw has a good base both when the blade 11 is attached in the normal state as shown in FIG. 1 and when it is attached in the state shown in FIG. Since the cutting material had to be guided by 12, the base had to be large. However, since the first member that spatially intersects with the blade of the base can move in the direction intersecting with the blade as in the present invention, even when the cutting material is a large member, the attachment of the normal blade And, even in the mounting position reversed 180 degrees, it has a base that can guide the cutting material, so that a more compact saver saw can be obtained.

  In the embodiment of the present invention, the motor can be energized by the power cord, but the effect of the present invention can be obtained even when the rechargeable battery can be energized. Obtainable.

  In the embodiment of the present invention, the reciprocating motion conversion mechanism is constituted by an intermediate shaft, a reciprocating plate, etc., but a saver saw having a mechanism for reciprocating the plunger by other reciprocating motion converting mechanisms. Can also achieve the effects of the present invention. That is, for example, even if the mechanism is configured to transmit the rotation of the motor to the gear and engage the plunger at a position eccentric from the rotation center of the gear, the effect of the present invention can be achieved even with a mechanism that reciprocates the plunger. It is something that can be done.

  In one embodiment of the present invention, the first member has a shaft portion and the second member has a long hole portion, but this relationship may be reversed. The effects of the present invention can be achieved. That is, the first member may have a long hole portion, and the second member may have a shaft portion.

The partial cross section front view which shows the saver saw of one Embodiment of this invention The enlarged view of the base which comprises the saver saw of one Embodiment of this invention The base enlarged view which shows the state which moved the 1st member from the state of FIG. AA line sectional view of FIG. 1 is a cross-sectional view taken along the line AA in FIG. Partial cross-sectional front view showing a state where the blade is mounted 180 degrees in the reverse direction Partial cross-sectional front view of a conventional saver saw Partial cross-sectional front view showing the state of cutting the cutting material of saver saw

Explanation of symbols

1 is a saver saw, 2 is a housing, 3 is a motor, 4 is a handle, 5 is a trigger, 6 is a power cord, 7 is an intermediate shaft, 8 is a reciprocating plate, 9 is a plunger, 10 is a blade mounting portion, 11 is a blade, 12 Is the base

Claims (5)

A housing containing a motor;
A reciprocating motion conversion mechanism for converting the rotation of the motor into a reciprocating motion of a plunger;
A blade detachably provided on the plunger and capable of cutting a cutting material;
A saver saw having a base with a portion extending so as to spatially intersect the blade,
The base includes at least a first member that spatially intersects with the blade, and a second member that extends from the housing and is connected to the first member;
The saver saw, wherein the first member is movable at least in a direction intersecting with the blade. The first member has a shaft;
The second member has an elongated hole extending so as to intersect the plunger,
The shaft and the slot are engaged;
The saver saw according to claim 1, wherein the first member can be locked at a predetermined position of the elongated hole.   3. The saver saw according to claim 2, wherein the shaft has a first position that can be locked with the elongated hole and a second position that cannot be locked with the elongated hole in the axial direction thereof. .   The saver saw according to any one of claims 1 to 3, wherein the first member is provided so as to be rotatable with respect to the second member. The blade has an attached portion that can be attached to the plunger;
5. The blade according to claim 1, wherein the blade is attachable to the plunger via a mounted portion at a first position and a second position that is 180 degrees reversed from the first position. The saver saw of any one of these.

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