JP6410091B2 - Tabletop cutting machine - Google Patents

Description

  The present invention relates to a tabletop cutting machine. In particular, it relates to a tabletop cutting machine having a circular saw blade.

  2. Description of the Related Art A conventional tabletop cutting machine is known that has a cutting portion that can swing with respect to a base and is always urged upward by a spring (see, for example, Patent Document 1). When cutting the material to be cut with such a tabletop cutting machine, an operator pushes down the cutting portion via the handle and arranges it at a position where cutting is possible. After the cutting operation is finished, if the operator weakens the force applied to the handle, the cutting portion swings upward by the biasing force of the spring and returns to the original position.

JP 2012-157929 A

  However, in the conventional tabletop cutting machine as described above, the tabletop cutting machine sometimes falls down due to the rotational moment generated when the cutting part returns upward.

  Therefore, an object of the present invention is to provide a tabletop cutting machine capable of preventing a fall and performing a stable cutting operation.

  In order to achieve the above object, a base portion on which a material to be cut can be placed, a first range including an initial position spaced from the base portion, and the material to be cut can be cut close to the base portion. A cutting portion having a cutting blade that is swingable with respect to the base portion within a second range that includes a cutting position and does not include the initial position, and the cutting portion is arranged to place the cutting portion at the initial position. First urging means for urging the cutting part in a direction away from the base part; and second urging means for urging the cutting part in a direction approaching the base part in the first range. , Provide a tabletop cutting machine.

  According to such a configuration, the cutting portion is arranged at the initial position by the first biasing means, and the operator swings the cutting portion to the cutting position against the biasing force of the first biasing means. The cutting operation of the material to be cut becomes possible. When the operator releases the hand after the cutting operation is finished, the cutting portion is urged in a direction away from the base portion by the urging force of the first urging means, and jumps back from the cutting position to the initial position. When the cutting part returns from the cutting position to the initial position, a rotational moment is generated in the cutting part. According to the tabletop cutting machine of the present invention, since the second urging means for urging the cutting portion in the direction approaching the base portion in the first range including the initial position is provided, the cutting portion returns to the initial position. Can absorb the impact of the jumping up. Thereby, the fall by the rocking moment of a tabletop cutting machine can be prevented, and a stable cutting operation can be performed. Further, in the second range that includes the first range and does not include the initial position, the urging force by the second urging means does not act on the cutting part, and therefore the cutting part can be swung quickly in the second range. The return to the initial position can be performed smoothly.

  Further, it is preferable that the second urging means has an urging force smaller than the urging force of the first urging means.

  According to such a configuration, since the second urging means has a urging force smaller than the urging force of the first urging means, the impact of the jumping up of the cutting portion is absorbed and the first urging means The cutting portion can be returned from the cutting position to the initial position by the urging force.

  Further, it is preferable that a support portion that supports the cutting portion so as to be swingable with respect to the base portion is further provided, and the second urging means is provided in the support portion.

  According to such a configuration, since the second urging means is provided in the support portion, it is not necessary to enlarge the base portion in order to provide the second urging means.

  The support portion includes a first support portion supported by the base portion, and a swing shaft rotatably supported by the first support portion, and the cutting portion includes the cutting portion. A blade, and a second support portion that is capable of swinging about the swing shaft with respect to the first support portion and that supports the cutting portion, the second biasing means Is provided in one of the first support portion and the second support portion in the vicinity of the swing shaft, and the other of the first support portion and the second support portion is in the vicinity of the swing shaft. And the second urging means is configured such that the cutting portion abuts against the abutted portion in the first range. Thus, it is preferable to urge the cutting portion in a direction approaching the base portion.

  According to such a configuration, since the second urging means and the abutted portion are provided in the vicinity of the swing shaft, the tabletop cutting machine can be prevented from being overturned by a compact configuration.

  Further, it is preferable that the second urging means is provided on the first support portion.

  According to such a configuration, since the second urging means is provided in the first support portion supported by the base portion having a relatively large weight among the components of the tabletop cutting machine, the cutting portion is initially set. The impact of jumping up when returning to the position can be absorbed more stably. Therefore, the tabletop cutting machine can be prevented from falling.

  In addition, it is preferable that the second urging unit includes a contact member that can contact the contacted portion and an elastic body that biases the contact member toward the contacted portion.

  According to such a configuration, since the second urging means includes the abutting member that can abut against the abutted portion and the elastic body that urges the abutting member toward the abutted portion, With this configuration, it is possible to absorb the impact of jumping when the cutting portion returns to the initial position.

  Moreover, it is preferable that a said 2nd biasing means has an elastic body which can contact | abut with the said to-be-contacted part.

  According to such a configuration, since the second urging means has the elastic body capable of contacting the contacted portion, the impact of the springing up when the cutting portion returns to the initial position is absorbed by a simple configuration. be able to.

  The support portion further includes a tilt shaft extending in a direction orthogonal to the extending direction of the swing shaft, and the first support portion is tiltable about the tilt shaft with respect to the base portion. Preferably there is.

  According to such a configuration, the angle of the cutting portion with respect to the workpiece can be changed by tilting the first support portion with respect to the base portion about the tilting axis. Even when the tilting angle of the cutting part with respect to the workpiece is changed, the second urging means is provided in the support part, so the positional relationship between the second urging means and the abutted part is maintained. It is possible to absorb the impact of jumping when the cutting portion returns to the initial position.

  Moreover, it is preferable to further comprise an adjusting means for adjusting the urging force of the second urging means.

  According to such a configuration, since the adjusting means for adjusting the urging force of the second urging means is provided, by adjusting the urging force of the second urging means, the tabletop cutting machine can be prevented from overturning, It is possible to realize a tabletop cutting machine with good workability for the operator.

  Moreover, it is preferable to further comprise a restricting means for restricting the cutting portion from moving beyond the initial position in a direction away from the base portion.

According to such a configuration, it further includes a restricting means for restricting the cutting portion from moving beyond the initial position in a direction away from the base portion. be able to.
The present invention further includes a base portion on which a material to be cut can be placed and a cutting blade can be attached and detached, and can swing within a swing range between an initial position and a cutting position closest to the base portion. Further, the cutting portion is urged in the direction from the cutting position toward the initial position within the entire swing range of the cutting portion supported by the base portion and the initial position to the cutting position. When the first urging means and the range in which the cutting portion can swing are divided into a first range including the initial position and a second range including the cutting position, the first range. And a second urging means for urging the cutting portion in a direction toward the base portion.

  According to the tabletop cutting machine according to the present invention, it is possible to provide a tabletop cutting machine capable of preventing a fall and performing a stable cutting operation.

The right view (initial position) of the tabletop cutting machine which concerns on the 1st Embodiment of this invention. The right view (cutting position) of the tabletop cutting machine which concerns on the 1st Embodiment of this invention. It is the elements on larger scale of the B section shown by FIG. 2, Comprising: The figure which shows the rocking | fluctuation shaft vicinity of the tabletop cutting machine which concerns on the 1st Embodiment of this invention when a cutting part exists in a cutting position. The figure which shows the rocking | swiveling axis vicinity of the tabletop cutting machine which concerns on the 1st Embodiment of this invention when a cutting | disconnection part rocks | swives a predetermined angle from the cutting position. It is the elements on larger scale of the A section shown by FIG. 1, Comprising: The figure which shows the rocking | fluctuation axis | shaft vicinity of the tabletop cutting machine which concerns on the 1st Embodiment of this invention when a cutting part exists in an initial position. The rear view of the tabletop cutting machine which concerns on the 1st Embodiment of this invention. It is a rear view of the tabletop cutting machine concerning a 1st embodiment of the present invention, and is a figure showing the state where a cutting part tilted. The elements on larger scale which show the rocking | swiveling axis vicinity of the tabletop cutting machine which concerns on the 2nd Embodiment of this invention. Sectional drawing along the IX-IX line of FIG. The figure which shows the rocking | fluctuation shaft vicinity of the tabletop cutting machine which concerns on the 3rd Embodiment of this invention when a cutting part exists in a cutting position. The figure which shows the rocking | fluctuation shaft vicinity of the tabletop cutting machine which concerns on the 3rd Embodiment of this invention when a cutting | disconnection part rocks | swives a predetermined angle from the cutting position. The figure which shows the rocking | fluctuation shaft vicinity of the tabletop cutting machine which concerns on the 3rd Embodiment of this invention when a cutting part exists in an initial position. The figure which shows the rocking | fluctuation shaft vicinity of the tabletop cutting machine which concerns on the 4th Embodiment of this invention when a cutting part exists in a cutting position. The figure which shows the rocking | fluctuation shaft vicinity of the tabletop cutting machine which concerns on the 4th Embodiment of this invention when a cutting part exists in an initial position.

  A tabletop cutting machine according to a first embodiment of the present invention will be described with reference to FIGS. The tabletop cutting machine 1 includes a base part 2, a holder 3, and a cutting part 4 that can swing with respect to the base part 2 via the holder 3. In the following description, the swing center of the cutting part 4 with respect to the base part 2 is the rear side, and the opposite side is the front side. The side where the base part 2 is provided with respect to the cutting part 4 is the lower side, and the opposite side is the upper side. In the state of FIG. 1, the right side is the right side and the opposite side is the left side when viewed from the rear side.

  The base portion 2 is mainly composed of a base 21 that can be placed on a floor surface, a turntable 22 carried on the base 21, and a fence 23 provided on the base 21. The upper surface of the turntable 22 is substantially flush with the upper surface of the base 21, and the turntable 22 is connected to the base 21 via a rotation shaft (not shown) orthogonal to the upper surface of the base 21. A groove (not shown) is formed in the turntable 22 so that a circular saw blade 43 of the cutting portion 4 described later can enter. At the time of cutting work, a material to be cut can be placed on the base 21 and the turntable 22.

  As shown in FIGS. 1 and 6, the fence 23 is fixed to the upper surface of the base 21 and includes a right fence 23A and a left fence 23B. The right fence 23A and the left fence 23B are substantially L-shaped and have a reference surface 23C (FIG. 1) extending in the vertical direction. When cutting the workpiece, the workpiece can be positioned by bringing the workpiece into contact with the reference surface 23C (FIG. 1).

  The holder 3 includes a tilt shaft 31, a hinge portion 32 as an example of a first support portion, and a swing shaft 33 that is supported by the hinge portion 32 and extends in a direction orthogonal to the tilt shaft 31. The holder 3 is an example of a support part.

  As shown in FIGS. 1 and 6, the tilt shaft 31 is supported by the turntable 22, extends in the front-rear direction, and is provided so that its axis coincides with the upper surface of the turntable 22.

  The hinge portion 32 can be tilted with respect to the turntable 22 around the tilting shaft 31 and is supported by the turntable 22 via the tilting shaft 31. Specifically, the hinge portion 32 stands up from the rear portion of the turntable 22 and is integrally connected to the tilting shaft 31. As shown in FIG. 3, a pair of wall portions 32 </ b> A that are spaced apart from each other in the direction orthogonal to the tilting shaft 31 (the left-right direction in the non-tilting state) are provided on the upper portion of the hinge portion 32. Each of the pair of wall portions 32 </ b> A is formed with a through hole 32 a that penetrates in the opposing direction and has a diameter slightly larger than the diameter of the swing shaft 33. Further, as shown in FIG. 3, a contact portion 32B that can contact a stopper bolt described later is provided on the front surface of the wall portion 32A. Further, a clamp lever 34 (FIG. 6) for fixing the hinge portion 32 at a desired inclination angle is provided in the vicinity of the tilting shaft 31 in the hinge portion 32.

  A damper portion 5 as an example of a second urging means is provided at the rear end portion of the hinge portion 32 and in the vicinity of the swing shaft 33. The damper unit 5 will be described later.

  The swing shaft 33 extends in a direction orthogonal to the tilt shaft 31 (left and right direction in a non-tilt state), is inserted through the through hole 32a of the hinge portion 32, and is supported by the left and right wall portions 32A. As shown in FIG. 3, a coil spring 35 as an example of a first urging means is disposed on the outer periphery of the swing shaft 33, and the coil spring 35 connects the cutting portion 4 to the swing shaft 33. It is urged counterclockwise in FIG. 1 (a direction away from the base 21 and the turntable 22) in the center. In other words, the coil spring 35 arrange | positions the cutting part 4 in the initial position shown by FIG. 1 in an unoperated state.

  As shown in FIG. 1, the cutting portion 4 can swing with respect to the base portion 2 around the swing shaft 33. Specifically, the cutting part 4 is movable between an initial position close to the base part 2 (FIG. 1) and a cutting position close to the base part 2 and capable of cutting the material to be cut (FIG. 2). is there. The cutting part 4 has a gear case 41, a motor 42 (FIG. 6) accommodated in the gear case 41, and a circular saw blade 43 as an example of a cutting blade.

  The gear case 41 includes a motor housing portion 41A that houses the motor 42, a handle portion 41B that is connected to the motor housing portion 41A, and a cutting blade support portion 41C that is connected to the motor housing portion 41A and supports the circular saw blade 43. Be prepared. The circular saw blade 43 is supported by the gear case 41 and the holder 3 so as to be swingable with respect to the base portion 2.

  The handle portion 41B can be gripped by an operator, and is provided with a switch (not shown) for controlling the driving of the motor 42.

  The cutting blade support portion 41C is an example of a second support portion, and supports the circular saw blade 43 in a rotatable manner and covers the upper half of the outer periphery of the circular saw blade 43. Furthermore, the cutting blade support portion 41 </ b> C supports the circular saw blade 43 so as to be swingable with respect to the base portion 2. As shown in FIG. 6, a through hole 41a slightly larger than the outer diameter of the swing shaft 33 is formed in the rear end portion 41D of the cutting blade support portion 41C, and the swing shaft 33 is formed in the through hole 41a. It is inserted. The rear end portion 41D of the cutting blade support portion 41C is provided between the pair of wall portions 32A. With such a configuration, the cutting blade support portion 41 </ b> C can swing around the swing shaft 33 with respect to the hinge portion 32 of the holder 3. Since the cutting blade support portion 41C is formed integrally with the motor housing portion 41A and the handle portion 41B and supports the circular saw blade 43 in a rotatable manner, the motor housing portion 41A, the handle portion 41B, the cutting blade The support portion 41 </ b> C and the circular saw blade 43 can swing integrally with the hinge portion 32.

  The circular saw blade 43 is connected to the motor 42 through a gear (not shown) provided in the gear case 41, and rotates the saw blade shaft 43A (FIG. 1) around the saw blade shaft 43A (FIG. 1) by the driving force of the motor 42. Can be cut. The circular saw blade 43 is swingable with respect to the base portion 2 integrally with the cutting blade support portion 41C, and is in an initial position (FIG. 1) close to the base portion 2 and close to the base portion 2. The cutting material can be moved between cutting positions (FIG. 2) where the cutting material can be cut.

  Further, as shown in FIGS. 1 and 5, a stopper bolt 44 as an example of a regulating means is provided between the swing shaft 33 and the circular saw blade 43 in the cutting blade support portion 41 </ b> C. The stopper bolt 44 extends in the left-right direction, and is provided at a position where the outer periphery abuts against the abutting portion 32B of the hinge portion 32 when the cutting portion 4 is biased upward by the coil spring 35 and is positioned at the initial position. ing.

  As shown in FIG. 5, in the rear end portion 41 </ b> D of the cutting blade support portion 41 </ b> C, in the vicinity of the swing shaft 33, an adjustment bolt 45 as an example of an adjustment means and a contacted portion, and an adjustment bolt 45 The protrusion part 41E which supports is provided. The protruding portion 41E is provided at the rear end portion 41D of the cutting blade support portion 41C and protrudes away from the swing shaft 33. A through hole 45a that can be screwed into the adjusting bolt 45 is formed in the protruding portion 41E.

  The adjustment bolt 45 is inserted into the through hole 45a of the protruding portion 41E, and is provided at a position facing or abutting against the upper surface of the abutting member 52 of the damper portion 5 described later. The adjustment bolt 45 changes the amount of protrusion from the lower end of the protrusion 41E by rotating, and can adjust the urging force of a spring 53 of the damper part 5 described later.

  The damper part 5 provided in the hinge part 32 is demonstrated. The damper part 5 is disposed on the swinging orbit of the cutting part 4, and in the first range, which is a range between the initial position shown in FIG. 2 and the position shown in FIG. The cutting part 4 is configured to be biased in a direction approaching the base part 2. As shown in FIG. 5, the damper unit 5 includes a cylinder 51, a contact member 52, a spring 53 as an example of an elastic body, and a restriction pin 54.

  The cylinder 51 has a substantially cylindrical shape extending in the vertical direction and having an upper end opened and a lower end closed. A through hole 51a that penetrates in the front-rear direction in a non-tilting state is formed at the upper end of the cylinder 51. A pedestal 51 </ b> B that protrudes radially inward from the inner peripheral surface 51 </ b> A of the cylinder 51 is provided at the lower end of the cylinder 51. The pedestal 51B has an inner diameter that is smaller than the inner diameter of the cylinder 51.

  The spring 53 has a lower end fixed to the pedestal 51 </ b> B and an upper end fixed to the contact member 52, and biases the contact member 52 upward toward the adjustment bolt 45. The biasing force of the spring 53 is smaller than the biasing force of the coil spring 35. A space surrounded by the pedestal 51 </ b> B and the bottom surface of the cylinder 51 is formed in the lower part of the spring 53.

  The contact member 52 is disposed below the adjustment bolt 45 and at a position where it can contact the adjustment bolt 45. The contact member 52 is configured to be movable along the inner peripheral surface 51 </ b> A of the cylinder 51, and has a substantially cylindrical shape having an outer diameter slightly smaller than the inner diameter of the cylinder 51. The upper end of the spring 53 is fixed to the lower end of the contact member 52. A groove 52a extending in the axial direction by a predetermined distance from the upper end is formed on the outer peripheral surface of the contact member 52, and the contact member 52 has a contact surface 52A that defines the lower end of the groove 52a.

  The regulation pin 54 regulates the movement of the contact member 52 relative to the cylinder 51 by contacting the contact surface 52 </ b> A of the contact member 52. The restriction pin 54 is inserted into the through hole 51 a of the cylinder 51, and one end projects from the inner peripheral surface 51 </ b> A of the cylinder 51. One end of the regulation pin 54 is disposed in the groove 52 a of the contact member 52. The contact member 52 can move in the vertical direction relative to the regulation pin 54 in a range where the regulation pin 54 is located in the groove 52a.

  With such a configuration, the abutting member 52 is positioned so as to face and separate from the adjustment bolt 45 when the cutting portion 4 is in the cutting position shown in FIGS. 2 and 3, and the cutting shown in FIG. The portion 4 is provided at a position where the adjustment bolt 45 can be contacted between a position where the part 4 is swung by a predetermined angle from the cutting position and an initial position shown in FIGS. 1 and 5. In other words, the damper portion 5 urges the cutting portion 4 in a direction approaching the base portion 2 in the first range including the initial position shown in FIG. 5, and includes the cutting position shown in FIG. The cutting portion 4 is not energized in the second range that does not include it. In the present embodiment, the range from the position (FIG. 4) where the cutting unit 4 swings by a predetermined angle with respect to the cutting position to the initial position (FIG. 5) corresponds to an example of the first range. The range from the swing position (FIG. 4) to the cutting position (FIG. 3) corresponds to an example of the second range.

  Next, the cutting operation of the tabletop cutting machine 1 will be described.

  In the initial state shown in FIG. 1, the cutting part 4 (circular saw blade 43) is disposed at an initial position spaced from the base part 2 (turn table 22). In order to cut the material to be cut, a switch (not shown) provided on the handle portion 41B is operated, the motor 42 (FIG. 6) is driven to rotate, and the circular saw blade 43 is rotated via the saw blade shaft 43A. If necessary, the tilt angle is set by tilting the cutting portion 4 about the tilt shaft 31 before operating a switch (not shown). In this state, when the operator grips the handle portion 41B and pushes down the cutting portion 4 to the cutting position (FIG. 2) against the biasing force of the coil spring 35, the cutting edge of the circular saw blade 43 is not shown in the turntable 22. The swinging is stopped by a stopper mechanism (not shown) after entering the groove and entering a predetermined amount. After the cutting of the material to be cut is completed, when the operator releases his / her hand from the handle portion 41B and releases the pressing force of the cutting portion 4, the cutting portion 4 is also in the initial position shown in FIG. 1 by the biasing force of the coil spring 35. Return to.

  The return of the cutting unit 4 from the cutting position to the initial position will be described in more detail. When the pressing force to the cutting part 4 is released in a state where the cutting part 4 is in the cutting position shown in FIGS. 2 and 3, the cutting part 4 is separated from the base part 2 by the biasing force of the coil spring 35. Start swinging.

  As shown in FIG. 4, when the cutting portion 4 swings a predetermined angle from the cutting position, the adjustment bolt 45 of the cutting portion 4 and the upper surface of the contact member 52 of the damper portion 5 come into contact with each other, so that the contact member 52 moves downward. And the spring 53 contracts. As the spring 53 contracts, an elastic force is generated, and the damper portion 5 biases the cutting portion 4 toward the base portion 2 via the cutting blade support portion 41C. In other words, a part of the swinging moment of the coil spring 35 is absorbed by the spring 53 through the contact member 52. Since the urging force of the spring 53 is smaller than the urging force of the coil spring 35, the contact member 52 is pushed down while sliding in the cylinder 51, and the cutting portion 4 continues toward the initial position shown in FIGS. Rocks. In other words, the damper part 5 urges the cutting part 4 in a direction approaching the base part 2 in the first range.

  As shown in FIGS. 1 and 5, when the cutting portion 4 reaches the initial position, the stopper bolt 44 provided on the gear case 41 contacts the contact portion 32 </ b> B of the hinge portion 32. When the stopper bolt 44 comes into contact with the contact portion 32B, the cutting portion 4 is restricted from moving beyond the initial position in a direction away from the base portion 2, and the return of the cutting portion 4 to the initial position is completed. .

  According to the tabletop cutting machine 1 according to the first embodiment, the cutting unit 4 is biased in a direction approaching the base unit 2 to a first range from the cutting position to a position where the cutting unit 4 is swung by a predetermined angle. Since the damper portion 5 is provided, it is possible to absorb the impact of jumping when the cutting portion 4 returns to the initial position. Thereby, the fall by the rocking moment of the tabletop cutting machine 1 can be prevented, and a stable cutting operation can be performed. Further, in the second range which is a range from the cutting position shown in FIG. 3 to the position shown in FIG. 4, the biasing force by the damper portion 5 does not act on the cutting portion 4. Then, the cutting part 4 can be swung quickly and the cutting part 4 can be smoothly returned to the initial position.

  Further, since the damper portion 5 has a biasing force smaller than the biasing force of the coil spring 35, the damper 5 absorbs the impact of the springing of the cutting portion 4, and the biasing force of the coil spring 35 moves the cutting portion 4 from the cutting position to the initial position. Can be returned.

  Moreover, since the damper part 5 is provided in the hinge part 32, in order to provide the damper part 5, it is not necessary to enlarge the base 21, and the enlargement of a main body can be avoided.

  Moreover, since the damper part 5 and the adjustment bolt 45 are provided in the vicinity of the swing shaft 33, the tabletop cutting machine 1 can be prevented from being overturned by a compact configuration.

  Moreover, since the damper part 5 is provided in the hinge part 32 supported by the base 21 and the turntable 22 which are comparatively heavy among the tabletop cutting machines 1, it jumps up when the cutting part 4 returns to the initial position. The shock can be absorbed more stably.

  In addition, the damper portion 5 includes a contact member 52 that can contact the adjustment bolt 45 and a spring 53 that urges the contact member 52 toward the adjustment bolt 45. It is possible to absorb the impact of jumping up when returning to the initial position.

  In addition, the angle of the circular saw blade 43 with respect to the workpiece can be changed by tilting the hinge portion 32 about the tilt shaft 31 with respect to the base portion 2. Even when the angle of inclination of the circular saw blade 43 with respect to the material to be cut is changed, the positional relationship between the damper portion 5 and the adjusting bolt 45 can be maintained because the damper portion 5 is provided on the hinge portion 32. .

  Further, since the adjustment bolt 45 for adjusting the urging force is provided by changing the compression amount of the spring 53 when the cutting portion 4 is located at the initial position, the urging force is adjusted by adjusting the urging force of the spring 53. If the force is excessive and does not operate smoothly, the urging force is weakened. If there is a fear that the urging force may fall over, the urging force is preferably increased to prevent the overturning. Since the working range (first range) can be changed, good workability for the worker can be realized.

  In addition, since the stopper 4 and the contact portion 32B for restricting the cutting portion 4 from moving beyond the initial position in the direction away from the base portion 2 are provided, the cutting portion 4 is securely placed at the initial position after the cutting operation is completed. Can be arranged.

  Next, a tabletop cutting machine 101 according to a second embodiment of the present invention will be described with reference to FIGS. Since the tabletop cutting machine 101 is the same as the tabletop cutting machine 1 according to the first embodiment except that the configuration of the damper portion is different, the same members are denoted by the same reference numerals and the description thereof is omitted. . The damper unit 150 of the tabletop cutting machine 101 includes a cam member 154 as an example of an adjusting unit instead of the restriction pin 54. The damper unit 150 is an example of a second urging unit. The cam member 154 integrally includes a shaft portion 154A inserted through the through hole 51a, an adjustment dial 154B, and a cam portion 154C. The shaft portion 154A is rotatably supported with respect to the cylinder 51. The adjustment dial 154B is fixed to one end portion of the shaft portion 154A and is provided outside the cylinder 51. The cam portion 154C is fixed to the other end portion of the shaft portion 154A, is disposed in the groove 52a of the contact member 52, and is in contact with the contact surface 52A. The cam portion 154 </ b> C is an elliptical disk, and can change the contact position with the contact surface 52 </ b> A of the contact member 52 by rotating.

  8 and 9, the long diameter of the cam portion 154C is directed in the axial direction of the cylinder 51 (vertical direction in the non-tilting state). When the adjustment dial 154B is rotated 90 ° from this state, the cam portion 154C is also rotated 90 ° integrally, and the short diameter of the cam portion 154C is oriented in the axial direction of the cylinder 51. At this time, the contact member 52 is urged toward the adjustment bolt 45 by the spring 53 and moves upward by a distance corresponding to the difference between the short diameter and the long diameter. Thus, by operating the adjustment dial 154B, the position where the contact member 52 and the cam portion 154C are in contact with each other can be adjusted, and the biasing force by the spring 53 can be adjusted.

  The return operation from the cutting position of the cutting unit 4 to the initial position of the tabletop cutting machine 101 is performed by the swinging position (the cutting unit 4) of the cutting unit 4 in which the contact member 52 and the adjustment bolt 45 abut according to the angle of the adjustment dial 154B. Is the same as the tabletop cutting machine 1 except that the position at which it is swung by a predetermined angle from the cutting position is arbitrary.

  According to the tabletop cutting machine 201 according to the second embodiment, the same effect as the tabletop cutting machine 1 according to the first embodiment can be obtained.

  Next, a tabletop cutting machine 201 according to a third embodiment of the present invention will be described with reference to FIGS. In the tabletop cutting machine 1 according to the first embodiment, the adjustment bolt 45 is provided at the rear end of the cutting blade support 41C. However, in the tabletop cutting machine 201 according to the third embodiment, the adjustment bolt 45 is provided. Is provided in the damper section.

  The cutting unit 204 of the tabletop cutting machine 201 according to the third embodiment has the same configuration as the cutting unit 4 except that it has a gear case 241. The gear case 241 is different from the gear case 41 in that a contacted portion 241A is provided instead of the adjustment bolt 45 and the protruding portion 41E. Further, the damper section 250 of the tabletop cutting machine 201 is an example of a second urging unit, and is an example of a cylinder 251, a contact member 52, a spring 53, a contact plate 255, a regulation pin 54, and an adjustment unit. The adjusting bolt 45 is provided.

  The cylinder 251 has substantially the same configuration as the cylinder 51 of the first embodiment, but is different in that it does not have the pedestal portion 51B and a through hole 251a is formed in the bottom wall. An adjustment bolt 45 is screwed into the through hole 251a. A contact plate 255 is provided in the cylinder 251 and between the adjustment bolt 45 and the spring 53. When the adjustment bolt 45 rotates, the protrusion amount of the adjustment bolt 45 into the cylinder 51 changes, and the position of the lower end of the spring 53 can be changed via the contact plate 255. Therefore, the urging force of the spring 53 can be adjusted without changing the range (first range) in which the urging force of the spring 53 acts.

  The returning operation from the cutting position of the cutting unit 204 of the tabletop cutting machine 201 to the initial position is the same as that of the tabletop cutting machine 1. In the initial position shown in FIG. 10, the contact member 52 and the contacted portion 241A are separated from each other. When the operator releases his / her hand from the handle portion 41B at the initial position, the cutting portion 204 starts swinging toward the initial position by the biasing force of the coil spring 35. As shown in FIG. 11, in a state where the cutting portion 204 is swung by a predetermined angle from the cutting position, the contact member 52 and the contacted portion 241 </ b> A contact each other, and a part of the swinging moment causes the contact member 52 to move. And is absorbed by the spring 53. Since the urging force of the spring 53 is smaller than the urging force of the coil spring 35, the contact member 52 is pushed down while sliding in the cylinder 51, and the cutting portion 204 continues to swing toward the initial position shown in FIG. To do. When the cutting part 204 reaches the initial position, the stopper bolt 44 provided on the gear case 41 comes into contact with the contact part 32B of the hinge part 32, and the movement of the cutting part 204 ends.

  According to the tabletop cutting machine 201 according to the second embodiment, the same effect as the tabletop cutting machine 1 according to the first embodiment can be obtained. Further, the urging force by the spring 53 can be adjusted without changing the range (first range) in which the urging force by the spring 53 acts.

  Next, a tabletop cutting machine 301 according to a fourth embodiment of the present invention will be described with reference to FIGS. The tabletop cutting machine 301 according to the fourth embodiment has the cutting unit 304 instead of the cutting unit 304, and has the damper unit 305 instead of the damper unit 5 in the first embodiment. It has the same configuration as the desktop cutting machine 1.

  As shown in FIG. 13, the cutting unit 304 of the tabletop cutting machine 301 has the same configuration as the cutting unit 304 except that the adjustment bolt 45 is not provided. The damper unit 350 of the tabletop cutting machine 301 includes a damper 351 and a damper support unit 352 that supports the damper 351. The damper unit 350 is an example of a second urging unit. The damper support portion 352 has a recess that protrudes rearward from the rear end portion 32D of the hinge portion 32 and opens upward. The damper 351 is an elastic body made of an elastic member such as rubber, and is disposed at a position capable of facing or abutting against the protruding portion 41E. The protruding portion 41E according to the fourth embodiment is an example of a contacted portion. The damper 351 is separated from the protruding portion 41E when the cutting portion 304 is in the cutting position shown in FIG. 13, and the protruding portion until the cutting portion 304 swings from the cutting position by a predetermined angle to the initial position. Abuts with 41E. The damper 351 is deformed by coming into contact with the protruding portion 41E, and a reaction force is applied to the protruding portion 41E by its elasticity. In other words, a part of the swing moment by the coil spring 35 is absorbed by the damper 351. The urging force due to the elasticity of the damper 351 is smaller than the urging force of the coil spring 35. Therefore, the cutting portion 304 continues to swing toward the initial position shown in FIG. 14 while deforming the damper 351. When the cutting part 304 reaches the initial position, the stopper bolt 44 comes into contact with the contact part 32B, and the return of the cutting part 304 is completed.

  According to the tabletop cutting machine 301 according to the fourth embodiment, in addition to the same effects as those of the first embodiment, a simpler configuration absorbs the impact of jumping when the cutting unit 304 returns to the initial position. can do.

  The tabletop cutting machine according to the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made within the scope described in the claims.

  In the first embodiment described above, the adjusting bolt 45 and the damper portion 5 are arranged on the swinging orbit of the cutting portion 4, but the present invention is not limited to this. For example, the rear end portion 41D of the gear case 41 may be disposed on a plane including the handle portion 41B. The same applies to the second to fourth embodiments.

  In the first embodiment described above, one set of the adjusting bolt 45 and the damper portion 5 is provided, but a plurality of sets may be provided. The same applies to the second to fourth embodiments.

  In the above-described embodiment, the hinge portion 32 has the contact portion 32 </ b> B and the stopper bolt 44 is provided in the cutting portion 4. However, the stopper bolt is provided in the hinge portion 32, and the cutting portion 4 is provided. A contact portion that can contact the stopper bolt may be provided.

  In addition, the damper portions 5, 150, 250, and 350 are provided on the hinge portion 32, but may be directly provided on the base 21 and the turntable 22.

  In the embodiment described above, the hinge portion 32 is configured to be tiltable with respect to the base portion 2, but may be fixed to the base portion.

DESCRIPTION OF SYMBOLS 1, 101, 201, 301: Desktop cutting machine, 2: Base part, 3: Holder, 4, 204, 304: Cutting part, 5, 150, 250, 350: Damper part, 21: Base, 22: Turntable, 23: Fence, 23A: Right fence, 23B: Left fence, 23C: Reference plane, 31: Tilt axis, 32: Hinge part, 32A: Wall part, 32B: Abutting part, 32D: Rear end part, 32a: Through hole , 33: oscillating shaft, 34: clamp lever, 41, 241: gear case, 41A: motor housing portion, 41B: handle portion, 41C: cutting blade support portion, 41D: rear end portion, 41E: protruding portion, 41a: penetration Hole, 42: motor, 43: circular saw blade, 43A: saw blade shaft, 44: stopper bolt, 45: adjustment bolt, 45a: through hole, 51, 251: cylinder, 51A: inner peripheral surface, 51B: pedestal, 51 : Through-hole, 52: contact member, 52A: contact surface, 52a: groove, 53: spring, 54: restriction pin, 154: cam member, 154A: shaft portion, 154B: adjustment dial, 154C: cam portion, 241A : Contacted part, 251a: through hole, 255: backing plate, 351: damper, 352: damper support part

Claims (10)

A base part on which a material to be cut can be placed;
A cutting portion supported by the base portion so that the cutting blade is detachable and can swing within a swing range between an initial position and a cutting position closest to the base portion ;
A first urging means for urging the cutting portion in a direction from the cutting position toward the initial position in the entire swing range of the cutting portion from the initial position to the cutting position ;
When the range in which the cutting portion can swing is divided into a first range including the initial position and a second range including the cutting position, the cutting portion is moved to the cutting position in the first range. And a second urging means for urging in a direction toward the table. 2. The tabletop cutting machine according to claim 1, wherein the second biasing unit applies a biasing force smaller than a biasing force of the first biasing unit to the cutting unit. A support portion for supporting the cutting portion so as to be swingable with respect to the base portion;
The tabletop cutting machine according to claim 1 or 2, wherein the second urging means is provided in the support portion. A base part on which a material to be cut can be placed;
A cutting portion supported by the base portion so that the cutting blade is detachable and can swing within a swing range between an initial position and a cutting position closest to the base portion;
A first urging means for urging the cutting portion in a direction from the cutting position toward the initial position in the entire swing range of the cutting portion from the initial position to the cutting position;
When the range in which the cutting portion can swing is divided into a first range including the initial position and a second range including the cutting position, the cutting portion is the base portion in the first range. Second urging means for urging in the direction toward
A first support portion supported by the base portion; and a swing shaft rotatably supported by the first support portion, wherein the cutting portion is swingable with respect to the base portion. A support part for supporting,
The cutting unit, before Symbol a swingable about the pivot shaft relative to the first support portion, and a second support portion supporting the cutting portion,
The second urging means is provided in one of the first support portion and the second support portion in the vicinity of the swing shaft,
The other of the first support portion and the second support portion has a contacted portion that can contact the second urging means in the vicinity of the swing shaft,
Said second biasing means, by the said cutting unit in the first range abuts on the abutted portion, you characterized by biasing said cutting portion in a direction toward the cutting position table on the cutting machine.   The tabletop cutting machine according to claim 4, wherein the second urging means is provided in the first support portion.   The second urging means includes a contact member that can contact the contacted part, and an elastic body that biases the contact member toward the contacted part. The tabletop cutting machine of Claim 4 or Claim 5.   The tabletop cutting machine according to claim 4 or 5, wherein the second urging means has an elastic body capable of abutting against the abutted portion. The support portion further includes a tilt shaft extending in a direction orthogonal to a direction in which the swing shaft extends,
The tabletop cutting machine according to any one of claims 4 to 7, wherein the first support part is tiltable about the tilting axis with respect to the base part.   The tabletop cutting machine according to any one of claims 1 to 8, further comprising adjusting means for adjusting a biasing force of the second biasing means. The tabletop cutting according to any one of claims 1 to 9, further comprising a restricting means for restricting the cutting portion from moving beyond the initial position in a direction away from the base portion. Machine.

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