JP4780528B2 - Tabletop cutting machine - Google Patents

Description

  The present invention relates to a tabletop cutting machine that places a processing member on an upper surface of a base portion and swings a cutting blade up and down to cut the processing member.

  2. Description of the Related Art A tabletop cutting machine that cuts a processing member by placing the processing member on a base portion and swinging a cutting blade up and down is conventionally known. As shown in FIG. 8, the tabletop cutting machine 101 has a base portion 110 and a cutting portion 150 that is a head portion, and a wood W that is a processing member is installed on the upper surface 110 </ b> A of the turntable 113 that constitutes the base portion 110. Has been. The cutting unit 150 includes a motor 153 and a circular saw blade 154, and is configured to cut the wood W when the circular saw blade 154 driven by the motor 153 rotates.

  Further, a saw cover 163 is provided in the cutting unit 150 of the tabletop cutting machine 101, and the saw cover 163 rotates around the rotation axis of the circular saw blade 154 in conjunction with the swinging of the cutting unit 150. Thus, the operator is prevented from coming into contact with the circular saw blade 154.

  In addition, the cutting unit 150 has a part for storing cutting waste such as a dust bag and a dust case (not shown) and a discharge port 156A to which a dust collecting hose of a dust collector (not shown) can be attached. Is configured not to scatter around. The cutting unit 150 is provided with a dust guide 160. The dust guide 160 is made of a flexible material such as rubber, and the wood W and the dust guide 160 are in contact with each other when the cutting unit 150 swings downward. Sometimes, the dust guide 160 is deformed. A tabletop cutting machine 101 provided with such a dust guide 160 is described in, for example, Japanese Patent Application Laid-Open No. 11-170214 (Patent Document 1).

  When cutting the wood W, the operator holds the handle 155 of the cutting unit 150 of the tabletop cutting machine 101 in the state shown in FIG. 8, and slides the cutting unit 150 toward the front side of the operator, that is, to the right in FIG. Move. After moving to the position of FIG. 9, the switch 155 </ b> A provided on the handle 155 is gripped to drive the motor 153 to rotate the circular saw blade 154. Then, by swinging the handle 155 downward in FIG. 9, the cutting part 150 is pivoted and lowered around the pivot shaft 132 </ b> D, and the wood W starts to be cut by the circular saw blade 154.

Next, as shown in FIG. 10, after the rotation of the cutting unit 150 reaches the bottom dead center, the operator slides the cutting unit 150 by pushing the handle 155 to the back side, that is, the left direction in FIG. Continue cutting while moving. The flow of cutting waste at this time is as indicated by an arrow a in FIG. 15, and the flow of cutting waste a is guided by the dust guide 160 and reaches the discharge port 156A. Then, when the operator finishes pushing the cutting unit 150 to the leftmost end shown in FIG. 11, the cutting of the wood W is finished, the operator opens the switch 155A, and the motor 153 and the circular saw blade 154 are operated. Stop.
Japanese Patent Laid-Open No. 11-170214

  However, in the conventional tabletop cutting machine 101, as indicated by an arrow in FIG. 12, the flow a of the cutting waste at the time when the cutting unit 150 is swung to start cutting passes below the dust guide 160. , Cutting scraps were scattered around. As a method for preventing this, for example, as shown in FIG. 13, it can be considered that the dust guide 160 extends long downward.

  However, when the cutting operation is continued while the cutting portion 150 is slid after the cutting portion 150 is rotated to the bottom dead center, the dust guide 160 is deformed as shown in FIG. There was a problem that the dust guide 160 was damaged due to contact with the blade 154.

  Therefore, the present invention prevents the cutting waste from being scattered around, and prevents the dust guide from being damaged by contact with the circular saw blade, thereby providing a clean and safe working environment. The purpose is to provide a tabletop cutting machine.

In order to achieve the above object, the present invention provides a base portion that supports a machining member, a cutting portion that supports a cutting blade and covers a part of the cutting blade, and a cutting portion that includes the cutting portion. Discharge formed with a swinging support portion that supports swinging in the vertical direction above the portion, and a discharge port provided at the cutting portion and capable of discharging cutting waste generated from the processing member to the outside of the cutting portion And a dust guide that extends downward from the cutting portion casing and introduces the cutting waste into the discharge portion, wherein the dust guide includes a deformable guide portion, and the guide A base part that supports the cutting part, and a protrusion part that is provided on the base part and engages with a guide part provided on the cutting part casing, and interlocks with the upward / downward swinging of the cutting part. along protrusion portion of the dust guide inside the guide and Provides a miter saw having a dust guide interlocking means for moving the relative downward / upward direction to the cutting unit.

  Here, the dust guide interlocking means comprises a link mechanism, the dust guide is supported by the link mechanism, and the cutting portion is connected to the link mechanism and is rotatable relative to the cutting portion casing. It is preferable that a saw cover is provided, and the link mechanism rotates the saw cover in conjunction with the swinging of the cutting part and moves the dust guide along the guide part.

  Further, it is preferable that the dust guide moves to the inside of the cutting portion casing when the cutting portion swings downward, and moves to the outside of the cutting portion casing when the cutting portion swings upward.

  Further, the swing support portion is supported by the base portion and holds the swing support portion, and the swing support portion can be moved in a direction substantially parallel to an intersecting line where the upper surface of the base portion and the cutting blade intersect. It is preferable to provide a slide support part.

According to the tabletop cutting machine according to claim 1 or 4 of the present invention, the dust guide is moved downward / upward relative to the cutting portion in conjunction with the upward / downward swing of the cutting portion. Since the dust guide interlocking means for moving in the direction is provided, the dust guide can be moved upward when the workpiece is cut by swinging the cutting portion downward. For this reason, when the dust guide is made of a deformable material, it is possible to prevent the dust guide from being deformed and cut by the cutting blade when the cutting portion is swung downward. . Further, when the cutting blade moves upward, the dust guide moves downward, so that it is possible to prevent the cutting waste from passing around between the processing member and the dust guide and scattering of the cutting waste around. it can.

Further, since the dust guide has a deformable guide portion, it is possible to prevent the processing member from being scratched when the dust guide abuts on the processing member. In addition, the dust guide has a base portion that supports the guide portion and a projection portion that is provided on the base portion and engages with the guide portion that is provided on the cutting portion casing. The dust guide can be guided so as to be movable in a predetermined direction.

According to the tabletop cutting machine according to claim 2 of the present invention, the dust guide interlocking means comprises a link mechanism, the dust guide is supported by the link mechanism, and the cutting portion is connected to the link mechanism and is connected to the cutting portion casing. A relatively rotatable saw cover is provided, and the link mechanism rotates the saw cover in conjunction with the swinging of the cutting part and moves the dust guide along the guide part. It is not necessary to provide interlocking means, and a desktop cutter with a simple configuration can be obtained.

  Hereinafter, a tabletop cutting machine according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the tabletop cutting machine 1 is a tabletop circular saw having a slide mechanism, and mainly includes a base portion 10, a support portion 30, and a cutting portion 50.

  The base portion 10 is configured to include an upper surface 10 </ b> A for placing the wood W, which is a processed member, and a pin 11 that serves as a connection location with the support portion 30. The pin 11 is configured such that its axial direction is parallel to the upper surface 10A. In the axial direction of the pin 11, the side where the wood W is placed with respect to the pin 11 is the front side, and the opposite side of the front side. Is defined as the rear side. Further, the upper side of the upper surface 10A is defined as the upper side, and the opposite side of the upper side is defined as the lower side. Further, a direction perpendicular to the front-rear direction and a direction perpendicular to the up-down direction is defined as a left-right direction, a direction from the back side to the front side in FIG. 1 is defined as a left direction, and a direction from the front side to the back side in FIG. It is defined as the right direction.

  The base unit 10 has a base 12 and a turntable 13. The turntable 13 is embedded in the center of the base 12 in a plan view, and the turntable 13 is supported by the base 12 so as to be rotatable in the horizontal direction, that is, rotatable about a rotation axis directed in a substantially vertical direction. . The upper surface of the turntable 13 is flush with the upper surface of the base 12, and the upper surface of the turntable 13 and the upper surface of the base 12 constitute an upper surface 10 </ b> A of the base portion 10.

  As shown in FIGS. 1 to 3, a pair of fences 14, 14 that support the side surfaces of the wood 2 are separated from each other by a predetermined distance on the upper surface of the base 12 to connect the front and back of the paper surface of FIG. 1. It extends in a straight line in the direction. In the figure, only one of the pair of fences 14 and 14 appears. At the center of the upper surface of the turntable 13 and between the pair of fences 14 and 14, when a circular saw blade 54 as a cutting blade swings downward as described later, it is lower than the upper surface of the turntable 13. A groove (not shown) that can enter the groove is formed.

  The support part 30 is mainly composed of a slide support part 31 and a swing support part 32. One end of the slide support portion 31 is supported by the base portion 10 with a pin 11 and is provided above the upper surface 10A. Therefore, the support part 30 can be tilted with respect to the upper surface 10 </ b> A of the base part 10 with the pin 11 as a tilting axis. At the other end of the slide support portion 31, a holding portion 31A for holding a slide bar 32B described later is provided. With this configuration, the swing support portion 32 is movably held in a direction substantially parallel to an intersecting line where the cutting blade swinging downward and the upper surface 10A of the base portion 10 intersect as described below.

  The swing support part 32 is mainly composed of a holder 32A and a slide bar 32B. The holder 32A is provided with a slide bar 32B at the rear end thereof, and the slide bar 32B is slidably supported by the holding portion 31A. Therefore, the swing support part 32 can slide in the front-rear direction using the holding part 31A as a support location. The holder 32A has an arm portion 32C at the upper portion thereof, and pivotally supports the cutting portion 50 by a holding pin 32D so as to be swingable as will be described later. A spring 32E is provided between the arm portion 32C and the cutting portion 50, and the spring 32E biases the cutting portion 50 upward with respect to the arm portion 32C. The holder 32A, the arm portion 32C, the holding pin 32D, and the rear end of the frame 51 described later shown in FIG. 1 constitute a hinge portion.

  The cutting unit 50 mainly includes a frame 51, a cover 52, a motor 53, and a circular saw blade 54. The frame 51 is pivotally supported by the holder 32A at its rear end portion so as to be swingable with respect to the arm portion 32C by a holding pin 32D. In the state of the tabletop cutting machine 1 shown in FIG. 1, the circular saw blade 54 is provided on the frame 51 so that the rotation axis is orthogonal to the front-rear direction, and covers the substantially upper part of the circular saw blade 54. In addition, a cover 52 is provided on the frame 51. The frame 51 and the cover 52 correspond to a cutting part casing.

  As shown in FIG. 3, a handle 55 serving as a grasping point at the time of cutting is provided on the front side of the cover 52 in a state where the cutting portion 50 is swung and brought close to the upper surface 10 </ b> A. Is provided with a switch 55 </ b> A for controlling the rotation of the motor 53. Further, on the rear side of the cover 52, there is an unshown inlet and cutting waste into which cutting waste that has entered the cover 52 and is generated at a contact position between the circular saw blade 54 and the wood W flows. An inflow / exhaust portion 56 having a discharge port 56 </ b> A to be discharged is provided. A dust bag (not shown) or the like can be attached to the discharge port 56 </ b> A of the inflow / discharge portion 56, and cutting waste flowing into the inflow / discharge portion 56 can be accommodated. The inflow / discharge portion 56 corresponds to a discharge portion.

  The motor 53 is provided on the upper part of the frame 51 and can drive the circular saw blade 54. In addition, a dust guide 60 is provided at a lower position on the rear side of the cover 52 so as to face a lower rear portion of the circular saw blade 54, and is generated at a contact position between the circular saw blade 54 and the wood W. The cutting waste to be introduced is introduced into the cover 52 (FIG. 4). As shown in FIG. 7, the inner peripheral surface of the cover 52 facing one of a pair of side wall portions of a dust guide 60 described later has a guide portion 52A, and the guide portion 52A includes a circular saw blade 54. A guide groove 52a extending substantially in the circumferential direction is formed. Further, as shown in FIG. 7, a through hole 52 b that penetrates the outer periphery and the inner periphery of the cover 52 is formed at the position of the cover 52 facing the other of a pair of side wall portions of the dust guide 60 described later. Yes.

  As shown in FIG. 4, the dust guide 60 has a guide portion 61 and a base portion 62, and the guide portion 61 is made of deformable rubber. For this reason, it is possible to prevent the wood from being scratched when the guide portion 61 of the dust guide comes into contact with the wood W. As shown in FIG. 4, the guide portion 61 includes a pair of side wall portions 61A and 61B having a substantially trapezoidal shape, and a bottom wall portion 61C having a substantially rectangular shape connecting the pair of side wall portions 61A and 61B. It is formed in a letter shape, and is configured so that cutting waste can flow along the inner peripheral surface in the longitudinal direction of the guide portion 61, that is, from the lower side to the upper side in FIG. Yes. A pair of through holes (not shown) are formed near one end of the guide portion 61 in the longitudinal direction, that is, near the top end of FIG.

  The base portion 62 is provided at the upper end portion shown in FIG. 4 in the longitudinal direction of the guide portion 61. The base portion 62 is made of a material that does not deform, and as shown in FIG. 4, a pair of side wall portions 62A and 62B having a substantially trapezoidal shape and a bottom wall having a substantially rectangular shape connecting the pair of side wall portions 62A and 62B. It is substantially U-shaped consisting of part 62C. The pair of side wall portions 62A and 62B of the base portion 62 are fixed to the inner peripheral surfaces of the pair of side wall portions 61A and 61B of the guide portion 61 by the surface, and the bottom wall portion 62C of the base portion 62 is inside the bottom wall portion 61C of the guide portion 61. The surface is fixed to the peripheral surface.

  One of the pair of side wall portions 62A and 62B of the base portion 62 is provided with a protrusion 64 as shown in FIG. 4, and the protrusion 64 is out of a pair of through holes (not shown) of the guide portion 61. It penetrates one side. Further, a female screw (not shown) is formed on the other 62B of the pair of side wall parts 62A and 62B of the base 62, and the female screw (not shown) is connected to the other of the pair of through holes (not shown) of the guide part 61. Bolts 65 that pass through the through holes 52b of the frame 51 are screwed together. The protrusion 64 is always engaged with the guide groove 52a of the guide portion 52A of the frame 51, and the dust guide 60 is moved in the vertical direction and the circular saw blade by the guide portion 52A by relatively moving in the guide groove 52a. 54 is configured to be stably guided in the circumferential direction.

  The cutting unit 50 is provided with a saw cover 63. As shown in FIG. 5 and the like, the saw cover 63 has a substantially sector shape in which the cover 52 is expanded in the circumferential direction of the circular saw blade 54 in a side view, and is provided along the inner peripheral surface of the cover 52. It has been. The saw cover 63 is supported so as to be rotatable relative to the frame 51 and the cover 52 coaxially with the circular saw blade 54 by the rotation shaft of the circular saw blade 54. The saw cover 63 is connected to a link mechanism 70 described later, and is configured to cover a lower portion of the circular saw blade 54 near the front. Further, as shown in FIG. 5 and the like, the saw cover 63 is formed with a long hole 63a. The long hole 63a is formed at the position near the side along the side located above the two sides corresponding to the radius defining the outline of the substantially fan-shaped saw cover 63 shown in FIG. It extends in the radial direction.

  The cutting unit 50 is provided with a link mechanism 70. As shown in FIG. 5, the link mechanism 70 is configured by a member having a substantially inverted S shape, and one end of the link mechanism 70 is supported by the holder 32A so as to be rotatable with respect to the holder 32A. As shown in FIG. 5, the link mechanism 70 forms a substantially straight line from one end to the other end and extends in the direction of the rotation axis of the circular saw blade 54, and the distance to the rotation axis is a predetermined distance. It bends upward at this position and extends along the rotation axis of the circular saw blade 54 in the circumferential direction of the circular saw blade 54. The other end of the link mechanism 70 is engaged with the elongated hole 63a of the saw cover 63 so as to be movable relative to the elongated hole 63a.

  As shown in FIG. 7, a bolt 65 is placed and engaged with a substantially linear portion near one end of the link mechanism 70 so that the side surface of the bolt 65 is in contact with the link mechanism 70. Are supported so as to be slidable relative to the link mechanism 70 in the longitudinal direction of the substantially linear portion, that is, in the left-right direction in FIG. The link mechanism 70 corresponds to dust guide interlocking means.

  When cutting wood, first, the cutting portion 50 is positioned at the top dead center, and the wood 3 is placed on the upper surface of the turntable 13. At this time, the dust guide 60 protrudes below the cutting portion 50 by the link mechanism 70. Further, the saw cover 63 is rotated relative to the frame 51 and the cover 52 in the clockwise direction in FIG. 1 by the link mechanism 70 and covers the circular saw blade 54 in the widest area.

  Next, in order to start cutting, the operator holds the switch 55A, drives the motor 53, and rotates the circular saw blade 54. Then, by moving the handle 55 downward, the dust guide 60 moves upward with respect to the cutting part 50 in conjunction with the rotation of the cutting part 50 by the link mechanism 70 as shown in FIG. This moves to the inside of the cutting part 50. At the same time, the saw cover 63 is rotated relative to the frame 51 and the cover 52 in the counterclockwise direction in FIG.

  While the dust guide 60 is moving into the cutting unit 50, the flow of cutting waste is guided by the dust guide 60 and reaches the discharge port 56 </ b> A of the inflow / discharge unit 56. When the cutting is further advanced and the cutting part 50 swings downward and reaches the bottom dead center, the dust guide 60 further moves into the cutting part 50 as shown in FIG. For this reason, it is possible to prevent the dust guide 60 from coming into contact with the circular saw blade 54 and damaging the dust guide 60 as in the prior art. At this time, the saw mechanism 63 is most rotated relative to the frame 51 and the cover 52 in the counterclockwise direction in FIG.

  The tabletop cutting machine according to the present invention is not limited to the above-described embodiments, and various modifications and improvements can be made within the scope described in the claims. For example, the bolt 65 is placed on the link mechanism 70, but the bolt 65 may be supported so as to be rotatable relative to the link mechanism so that the bolt 65 cannot move in the extending direction of the link mechanism.

  Further, the dust guide 60 is configured to move up and down by the link mechanism. However, the present invention is not limited to this configuration, and the dust guide is moved up and down separately from the link mechanism. The dust guide may be moved downward / upward relative to the cutting portion in conjunction with the swing.

  Moreover, although the cutting | disconnection part 50 was slidable in the front-back direction, the structure which is not slidable may be sufficient. Moreover, although the guide part 61 of the dust guide 60 was comprised with rubber | gum, it is not limited to rubber | gum.

The left view which shows the tabletop cutting machine which concerns on embodiment of this invention. The left view which shows the tabletop cutting machine which concerns on embodiment of this invention. The left view which shows the tabletop cutting machine which concerns on embodiment of this invention. The side view which shows the dust guide of the tabletop cutting machine which concerns on embodiment of this invention. The right view which shows the cutting part of the tabletop cutting machine which concerns on embodiment of this invention. The right view which shows the cutting part of the tabletop cutting machine which concerns on embodiment of this invention. The principal part sectional view showing the link mechanism and dust guide of the tabletop cutting machine concerning an embodiment of the invention. The left view which shows the conventional desktop cutting machine. The left view which shows the conventional desktop cutting machine. The left view which shows the conventional desktop cutting machine. The left view which shows the conventional desktop cutting machine. The left view which shows the flow of the cutting waste in the conventional tabletop cutting machine. The left view which shows the flow of the cutting waste in the conventional tabletop cutting machine. The left view which shows the conventional desktop cutting machine. The left view which shows the flow of the cutting waste in the conventional tabletop cutting machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Desktop cutting machine 10 ... Base part 31A ... Holding part 32 ... Swing support part 50 ... Cutting part 52A ... Guide part 52a ... Guide groove 54 ... Round Saw blade 56 ... Inflow / discharge portion 56A ... Discharge port 60 ... Dust guide 61 ... Guide portion 62 ... Base portion 62A ... Projection portion 63 ... Saw cover W ... Wood

Claims (4)

A base portion for supporting the processed member;
A cutting part having a cutting part casing that supports the cutting blade and covers a part of the cutting blade;
A swing support portion for supporting the cutting portion so as to be swingable in the vertical direction above the base portion;
A discharge part provided with a discharge port provided to the cutting part and capable of discharging cutting waste generated from the processed member to the outside of the cutting part;
In a tabletop cutting machine having a dust guide that extends downward from the cutting portion casing and introduces the cutting waste into the discharge portion,
The dust guide has a deformable guide part, a base part that supports the guide part, and a protrusion part that is provided on the base part and engages with the guide part provided on the cutting part casing,
A dust guide that moves the projection of the dust guide downward / upward relative to the cutting portion along the guide portion in conjunction with the upward / downward swing of the cutting portion. A tabletop cutting machine characterized by having interlocking means. The dust guide interlocking means comprises a link mechanism, the dust guide is supported by the link mechanism,
The cutting part is provided with a saw cover connected to the link mechanism and rotatable relative to the cutting part casing,
2. The tabletop cutting machine according to claim 1, wherein the link mechanism rotates the saw cover in conjunction with the swinging of the cutting part and moves the dust guide along the guide part. The dust guide moves to the inside of the cutting portion casing when the cutting portion swings downward, and moves to the outside of the cutting portion casing when the cutting portion swings upward. Described tabletop cutting machine. A slide support that is supported by the base portion and holds the swing support portion, and is capable of moving the swing support portion in a direction substantially parallel to an intersecting line where the upper surface of the base portion and the cutting blade intersect. The tabletop cutting machine according to any one of claims 1 to 3, further comprising a section.

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