JP4694187B2 - Dust collector of cutting machine - Google Patents

Description

  The present invention relates to a dust collecting device for collecting dust generated when a cutting material such as wood is cut using a cutting machine having a rotating cutting blade.

A tabletop type table equipped with a table for placing cutting material, a cutting machine body supported so as to be tiltable up and down with respect to this table, and a dust collecting device for collecting dust generated by cutting work A technique related to a cutting machine is disclosed in, for example, Japanese Patent Laid-Open No. 10-180713 or US Pat. No. 6,289,778.
The dust collector installed in this type of cutting machine is mainly a dust collection bag made of cloth that has air permeability, and this dust collection bag is attached to a cylindrical attachment port provided at the rear of the blade case. It has been. Since this dust collection bag is communicated with the blade case through the attachment port, the chips generated by cutting are wound up in the blade case by the rotation of the cutting blade, and further blown into the dust collection bag with that momentum. And collected.
Japanese Patent Laid-Open No. 10-180713 US Pat. No. 6,289,778

However, according to the conventional dust collecting device, the dust collecting bag is provided in a state extending rearward from the rear part of the blade case. Therefore, when the cutting machine body is moved downward to perform cutting processing, the dust collecting bag is reversed. The bag moves to a position where the rear side protrudes upward. For this reason, when the cutter body is held and moved or stored in the lower moving end position after the work is completed, the dust bag is not easy to handle because it protrudes upward, and the storage in the height direction is wider. It was necessary to secure space. It should be noted that this problem does not occur if the dust bag is removed during storage, but it is troublesome to remove it every time it is stored, etc., and it is necessary to treat the collected dust every time. Because there is, there is a trouble in this point.
The present invention has been made in view of this problem, and is a member that collects dust (hereinafter simply referred to as a dust collection bag or dust collection box) even when the cutting machine body is held at the lower end position. An object of the present invention is to provide a dust collector in which a dust box) does not protrude upward.

The above problem is solved by the following invention.
A first invention is a cutting machine comprising a table for placing a cutting material and a cutting machine body supported so as to be tiltable up and down with respect to the table, wherein the cutting machine body is a blade case by a cutting blade. It is equipped with a dust collector for collecting the dust that is wound up inside, and this dust collector is equipped with a dust collection box for collecting the dust, and this dust collection box at the dust collection port of the blade case. The dust collecting box includes a connecting member to be connected, and the dust collecting box is connected to the cutting machine body via the connecting member so as to be tiltable up and down.
According to the first aspect of the invention , the dust collection box can be tilted up and down with respect to the dust collection port and thus the cutting machine main body, so that the dust collection box is placed at, for example, the lower moving end position regardless of the tilting position of the cutting machine main body. It can be made to hold | maintain and can be located in a position lower than before. For this reason, by holding the cutting machine main body at the lower moving end position and holding the dust collecting box at the lower moving end position, it can be transported easily with the dust collecting box attached. The cutting machine can be stored in a space whose height direction is narrower than before.
The second invention is the dust collector according to the first invention, wherein the dust collection box is held at the lower moving end position by its own weight.
According to the second aspect of the invention , even if the cutting machine body is tilted up and down, the dust collection box is held at the substantially lower end position by its own weight, so that the cutting machine body is lowered to transport or store the cutting machine. Even if the dust collecting box is held at the moving end position, the dust collection box can be held at a low position, and thus the above-described effects can be obtained.
A third invention is the dust collector according to the first invention, wherein the dust collection box is configured to be able to hold a position in the middle of its tilting range.
According to the third invention , the dust collection box is a part of the entire tilting range and is held at a position above the lower moving end position, and tilts up and down integrally with the cutting machine body at this position. . For example, when the position holding state of the dust collection box is released by manual operation, the dust collection box is held at the lower moving end position by its own weight, and in this state, the lower moving end is independent of the tilting position of the cutting machine body as described above. Held in position. According to this, at the time of cutting work, for example, by holding the dust collection box at a certain tilting position with respect to the cutting machine body, the chips that are wound up in the blade case are efficiently blown into the dust collection box. On the other hand, when the cutting machine is stored after the cutting operation is finished, the dust collection box is tilted downward from its holding position and held at the lower moving end position by its own weight to keep the height low. Therefore, the handleability during transportation can be improved, and the height direction can be stored in a narrow space.

According to a fourth invention, in the first invention, a lower moving end restricting member is provided on the support side of the cutting machine body, and the lower moving end restricting member receives the dust collecting box from below to move the dust collecting box downward. It is a dust collector configured to regulate the end position.
According to the fourth invention , the dust collection box is received by the lower moving end restricting member and the lower moving end position thereof is restricted, so that the dust collecting box is another member (for example, a movable part such as a sliding member). It is possible to prevent the dust collecting box and other members from being damaged.
A fifth invention is the dust collector according to the fourth invention, wherein the lower moving end regulating member has a biasing force in a direction to push the dust collecting box upward.
According to the fifth invention , since the lower moving end regulating member has a buffer function, it is possible to absorb an impact or vibration when the dust collecting box reaches the lower moving end. In addition to preventing damage to the end regulating member, it is possible to prevent the generation of impact sound and vibration sound.
According to a sixth invention, in the fourth invention, the lower moving end regulating member includes a rotating body, and the rotating body is brought into contact with the other of the dust collecting box or the cutting machine main body to determine the lower moving end position of the dust collecting box. It is a dust collector configured to be regulated.
According to the sixth invention , in a state where the dust collection box is received by the lower moving end regulating member via the rotating body, for example, when the cutting machine body is tilted up and down, the horizontal direction of the dust collection box ( A smooth movement state in the rotation direction of the rotating body can be ensured, thereby preventing the dust collection box and the lower moving end regulating member from being damaged, and enhancing their durability.

Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the entire cutting machine 1 provided with the dust collector 20 of the present embodiment. Embodiment described below has a big feature in the dust collector 20, and about the structure of the cutting machine 1 itself to which this is attached, it is sufficient similarly to a conventional structure. Hereinafter, the configuration of the cutting machine 1 itself will be briefly described.
As shown in FIG. 1, the cutting machine 1 is a so-called table-top type slide circular saw, and includes a table 3 on which a cutting material W is placed, and a base 2 that supports the table 3 so as to be rotatable in the horizontal direction. Two lower slide bars 4 and 4 supported so as to be movable in parallel and axially from the rear part of the table 3, and a tilting support part 5 attached between the rear end parts of both slide bars 4 and 4, The two upper slide bars 6 and 6 supported on the slide support portion 5a provided on the upper portion of the tilt support portion 5 so as to be slidable in parallel and axially with each other, and the front ends of the upper slide bars 6 and 6 A main body support portion 7 attached between the parts and a cutting machine main body 10 supported by the main body support portion 7 via a support shaft 8 so as to be tiltable up and down are provided.
The cutting machine main body 10 is large in the cutting direction (left-right direction in FIG. 1, front-rear direction as viewed from the operator) by the two-stage slide mechanism composed of the lower slide bars 4, 4 and the upper slide bars 6, 6. It can be moved by a stroke, whereby a large cutting material W can be cut. The slide position of the lower slide bars 4 and 4 with respect to the table 3 is fixed by tightening the lower slide fixing screw 9. Further, the slide position of the upper slide bars 6 and 6 with respect to the tilting support portion 5 is fixed by tightening the upper slide fixing screw 11. If both the slide fixing screws 9 and 11 are tightened, the cutting machine main body 10 is fixed so as not to move in the cutting direction. Therefore, in this state, the cutting machine main body 10 can only be tilted up and down.
When the fixing lever 5b provided on the tilting support portion 5 is loosened, the cutting machine body 10 can be tilted in the left-right direction with respect to the table 3, and so-called tilt cutting can be performed. Detailed description of this tilt cutting function is omitted.

The cutting machine body 10 includes a circular cutting blade 13 that is rotated by an electric motor 12. The upper side of the cutting blade 13 is covered with a blade case 14. The lower side of the cutting blade 13 is covered with an openable safety cover 15. The safety cover 15 is opened in conjunction with the downward tilting operation of the cutting machine body 10, and is closed in conjunction with the upward tilting operation. Detailed description of the interlocking mechanism for that purpose will be omitted. A handle 16 that is held by an operator is provided in the front part of the motor case 12a and in the vicinity of the back part of the blade case 14. The handle 16 is equipped with a lighting fixture 17.
When the operator holds the handle 16 and pulls the trigger switch 16a with the fingertip, the electric motor 12 is activated and the cutting blade 13 rotates. When the cutting machine body 10 is moved downward while rotating the cutting blade 13 and the cutting blade 13 is pressed against the cutting material W, the cutting material W is cut. The cutting blade 13 rotates at a high speed in the counterclockwise direction in FIG. Accordingly, the chips generated by cutting are wound up into the blade case 14 from the rear end of the cutting blade 13. The chips wound up in the blade case 14 are collected by a dust collector 20 described below.
The dust collector 20 includes a dust collection box 21. The dust collection box 21 corresponds to an embodiment of the dust collection box described in the claims. The dust collection box 21 is connected to a cylindrical dust collection port 14 a provided at the rear part of the blade case 14. The blade case 14 and the dust collection box 21 communicate with each other through the dust collection port 14a. Details of the dust collection box 21 are shown in FIG.

The dust collection box 21 of this embodiment includes a first dust collection box 22, a second dust collection box 30, and a third dust collection box 40.
The first dust collection box 22 has a left and right split structure comprising a left box portion 22a and a right box portion 22b. A connecting member 23 is attached between the front end portions of the left box portion 22a and the right box portion 22b. Details of the connecting member 23 are shown in FIG.
The connection member 23 includes a cylindrical tilt support portion 23a and a connection pipe portion 23b connected to the dust collection port 14a on the cutting machine body 10 side. Both side portions of the tilting support portion 23a are hermetically closed by circular lids 23c and 23c. The connecting pipe portion 23b is integrally provided on the peripheral surface of the tilt support portion 23a in a state of protruding in the radial direction. The connecting pipe portion 23b has a diameter that allows airtight connection to the dust collection port 14a. The inner peripheral side of the tilting support portion 23a and the inner side of the blade case 14 are communicated with each other through the dust collection port 14a and the inner peripheral side of the connecting pipe portion 23b. In addition, an opening 23d having substantially the same diameter as the connection pipe portion 23b is formed on the peripheral surface of the tilt support portion 23a and on the opposite side of the connection pipe portion 23b. The opening 23 b is always opened inside the first dust collection box 22. For this reason, the inside of the first dust collection box 22 and the inside of the blade case 14 are always in communication with each other through the connecting member 23.
Both end portions of the tilt support portion 23a are rotatably fitted into circular support recesses 22c and 22c provided on the inner surfaces of the left and right box portions 22a and 22b, and the tilt support portion 23a rotates about its axis. Thus, the connecting member 23 is rotatably supported in a direction in which the connecting pipe portion 23b is tilted relatively up and down at the tip end portion of the first dust collection box 22. The connecting pipe portion 23 b protrudes from an opening 22 d formed at the tip of the first dust collection box 22. The opening 22d is long and open in a range that allows the connecting pipe portion 23b to tilt up and down. The dust collection box 21 is supported by the rear part of the blade case 14 through the connection member 23, so that the dust collection box 21 is about 5 ° at the maximum downward (clockwise in FIG. 6) with respect to the axis J of the dust collection port 14a. And is supported so as to be tiltable in the range of about 40 ° at the maximum (counterclockwise direction in FIG. 6). The dust collection box 21 is tiltable up and down within this range, and within this range, the dust collection box 21 is held at the lower tilt end position by its own weight unless any operating force is applied (free tilt state).

The opening 22d of the first dust collection box 22 is airtightly partitioned from the inside of the first dust collection box 22, and the dust collected in the first dust collection box 22 is on the opening 22d side. The air is not blown out and the blown air is prevented from leaking. That is, the seal member 24 made of a felt material is continuously attached to both end surfaces and the peripheral surface of the connection member 23a over the entire circumference. On the other hand, the support recesses 22c and 22c of the left and right box portions 22a and 22b are provided with wall portions 22e and 22e having arc-shaped cross sections in two ranges along the periphery thereof. The two wall portions 22e, 22e in each support recess 22c are provided at positions facing each other with respect to the center of the support recess 22c (the rotation center of the connection member 23). Moreover, each wall part 22e is formed in the state extended long in the width direction of the said 1st dust collection box 22, Wall part 22e, 22e by the side of the left box part 22a, and Wall part 22e by the side of the right box part 22b, Each of the ends 22e is abutted without gap. The seal member 24 is slidably contacted between the wall portions 22e and 22e of the left and right box portions 22a and 22b and to the bottom surfaces of the support concave portions 22c and 22c, and the inside of the first dust collection box 22 is an opening portion. It is airtightly partitioned from 22d (outside of the first dust collection box 22).
Each wall part 22e-22e is formed along the edge part of the support recessed part 22c in the range which does not obstruct the relative up-down tilting operation | movement of the connection pipe part 23b, and does not obstruct | occlude the blowing direction front of the opening part 23d. . Moreover, each wall part 22e-22e is formed over the range from which the sealing member 24 will always be contact | abutted in the full range of the relative rotation angle of the tilting support part 23 accompanying the vertical tilting operation | movement of the dust collection box 21. FIG. Has been.
A stopper protrusion 23e is provided on the tilting support portion 23a of the connecting member 23. The stopper projection 23e abuts against the edge of the wall 22e, so that the tilting range of the connection member 23 is restricted.
Thus, while being supported so as to be able to tilt up and down via the connection member 23, the chips that are wound up by the cutting blade 13 are blown into the first dust collection box 22 communicated in the blade case 14 together with air. It is. A relatively large air among the air blown into the first dust collection box 22 and the chips mixed therein is dropped by its own weight and collected in the first dust collection box 22. The air blown into the first dust collection box 22 and the remaining chips are blown into the second dust collection box 30 described later.
A discharge port 22 f is provided at the bottom of the first dust collection box 22. The discharge port 22f is opened and closed by a lid 26. The lid 26 is rotatably supported on the bottom of the first dust collection box 22 via a support shaft 27. Further, the lid 26 is biased in the opening direction by the torsion spring 28. Further, the lid 26 is locked in a closed state by a locking lever 29 provided on the rear surface of the first dust collection box 22. When the locking lever 29 is operated in the unlocking direction, the lid 26 is opened by the biasing force of the torsion spring 28. If the lid 26 is opened, the dust collected in the first dust collection box 22 can be discharged.

Next, a vent 25 is provided at the upper rear end of the first dust collection box 22. A second dust collection box 30 is connected to the first dust collection box 22 through the vent 25. The second dust collection box 30 includes a cylindrical box 31 formed in a conical shape whose lower side is inclined in the small diameter direction. The upper portion of the cylindrical box 31 is closed by a lid 32 to which a fine air-permeable mesh that cannot pass cutting chips is attached. A cylindrical body 32 a is provided on the inner surface of the lid 32. The cylindrical body 32 a extends downward along the center of the second dust collection box 30. As shown in FIG. 7, the vent hole 25 is arranged so as to be shifted in the horizontal direction (lower side in FIG. 7) with respect to the cylindrical body 32a. For this reason, the air blown from the first dust collection box 22 through the vent 25 and the chips mixed therein are counterclockwise around the cylindrical body 32a as shown by the white arrow in FIG. Turn in the direction. In the process in which the air and chips blown into the second dust collection box 30 swirl around the cylindrical body 32a, the chips having a higher specific gravity are moved to the inner wall surface side of the second dust collection box 30 due to the difference in centrifugal force. While moving and falling downward, air having a small specific gravity rises from the center of the second dust collection box 30 and is exhausted to the outside through the lid 32, whereby the blown air and chips are efficiently separated. (Cyclone dust collection).
The lower part of the second dust collection box 30 is connected to the third dust collection box 40 via the discharge port 40a. For this reason, the chips separated from the air in the second dust collection box 30 fall into the third dust collection box 40. The third dust collection box 40 is fixed to the side portion of the first dust collection box 22. The bottom of the third dust collection box 30 is also opened and closed by the lid 26. Accordingly, when the locking lever 29 is unlocked and the lid 26 is opened, the chips in the first and third dust collection boxes 22 and 40 can be discharged at a time.
The dust collection box 21 configured as described above is received from below by the lower moving end regulating member 50. The lower moving end regulating member 50 is formed by bending a steel wire having an appropriate wire diameter into a substantially U shape, and both ends thereof hold the rear end portions of the upper slide bars 6 and 6 at a constant interval. It is fixed to the holding member 6a with fixing screws 51 and 52. The lower moving end regulating member 50 extends above the holding member 6a toward the front side (operator side), and is disposed in a state having appropriate elasticity in the vertical direction. A rotating body 53 in which a steel wire is wound in a coil shape is attached to the tip of the lower moving end regulating member 50.
The rotating body 53 is rotatably attached to the distal end portion of the lower moving end regulating member 50. In a state where the rotating body 53 is in contact with the lower surface of the dust collection box 20 (the lower surface of the lid 26), the dust collection box 20 is placed on the lower moving end regulating member 50, whereby the dust collection box 20 is The lower moving end regulating member 50 is elastically received from below. Further, since the dust collection box 20 is received by the lower moving end regulating member 50 with the rotating body 53 in contact with the lower surface thereof, the dust collecting box 20 moves smoothly in the front-rear direction as the cutting machine body 10 moves up and down. Thus, the cutting machine body 10 can be moved up and down smoothly.

According to the dust collector 20 of the present embodiment configured as described above, the swarf wound in the blade case 14 by the rotation of the cutting blade 13 passes through the dust collection port 14a into the first dust collection box 22. Infused. Of the chips blown into the first dust collection box 22, relatively large chips fall within the first dust collection box 22 due to their own weight. The remaining chips are blown into the second dust collection box 30 on the air flow. The air and chips blown into the second dust collection box 30 swirl around the cylindrical body 32 a because the vent 25 is eccentric with respect to the center of the second dust collection box 30, and the swirling process. In FIG. 3, the chips having a relatively large specific gravity are separated and dropped to the outer peripheral side due to the difference in centrifugal force, and then collected in the third dust collection box 40. On the other hand, air having a small specific gravity is swirled and separated to the center side of the second dust collection box 30 and then exhausted to the outside through the vent of the lid 32.
The dust collection box 21 having the cyclone type dust collection function as described above is supported so as to be freely tiltable up and down within a range of about 45 ° at the maximum with respect to the cutting machine body 10 via the connection member 23. For this reason, the dust collection box 21 is held at a substantially constant position regardless of the tilting position of the cutting machine body 10. That is, as apparent from a comparison between FIGS. 1 and 2 and FIGS. 3 and 4, in a state where the cutting machine main body 10 is located at the upper position (the state shown in FIGS. 1 and 2), the dust collection box 21. Is located at a position (horizontal position) where the lower surface is positioned substantially parallel to the upper slide bars 6 and 6, and at this horizontal position, the lower surface is brought into contact with the distal end portion (rotating body 53) of the lower moving end regulating member 50. It is received by the lower moving end regulating member 50 in a contacted state.
When the cutting machine body 10 is tilted downward from the above state, the dust collection port 14a is gradually displaced downward along with this, and as a result, the connection member 23 rotates in a direction in which the connection pipe portion 23b is directed downward. Thus, by rotating the connecting member 23 in accordance with the tilting operation of the cutting machine body 10, the dust collection box 21 can be held at the horizontal position with almost no displacement from the horizontal position.

Therefore, as shown in FIGS. 3 and 4, when the cutting machine body 10 is held at the lower end position of the tilting range and the cutting machine 1 is stored, the dust collection box 21 is placed in the horizontal position. Since the dust collection box 21 can be stored in a low position, it can be stored in a space whose height is narrower than before. It becomes like this.
Further, since the dust collection box 21 is held in a substantially horizontal position regardless of the tilting position of the cutting machine main body 10, the position where the second dust collection box 30 is substantially raised (the cylindrical body 32a is set along the vertical direction). Held at the same position) and hardly tilted. Therefore, since the air blown from the first dust collection box 22 always swirls around the cylindrical body 32a along the vertical direction, the centrifugal force and gravity are efficiently applied to the chips having a larger specific gravity than the air. Thus, the cyclone function for separating from the air can be made to function efficiently.
Furthermore, since the dust collection box 21 is configured to be received from below by the lower moving end regulating member 50, the dust collection box 21 is prevented from interfering with, for example, the upper slide bars 6 and 6, and thereby the cutting machine body 10 Smooth sliding motion can be ensured.
Further, since the dust collection box 21 can be connected to the dust collection port 14a without changing the configuration of the cutting machine body 10 side when applying the illustrated dust collector 20, the conventional fixed type (tilt up and down) No) Since the dust collection box 21 illustrated in place of the dust collection box can be retrofitted, the dust collection box of the cutting machine already used at the work site or the like is used as the vertical tilting dust collection box 21 according to the present invention. Therefore, the applicable range of the dust collector 20 can be greatly expanded.
Further, for the lower moving end regulating member 50, for example, bolts for fixing the upper slide bars 6 and 6 to the slide support portion 5a can be used as the fixing screws 51 and 52 as they are (tightened together). The lower moving end regulating member 50 can be retrofitted without any special additional work.

Various modifications can be made to the embodiment described above. For example, although the configuration in which the lower moving end regulating member 50 is attached to the slide support portion 5a is exemplified, the configuration may be such that the slide support portion 5a is attached to the main body support portion 7 or the dust collection box 21 side.
Further, the dust collection box 21 is configured to tilt to its lower end (position tilted about 5 ° downward with respect to the axis J) by its own weight in its entire tilt range (about 45 °) (position holding mechanism in the middle position) However, the dust collection box 21 may be configured to hold the position of the dust collection box 21 at a midway position in the entire tilt range. FIG. 8 shows a support structure for the cutting machine body 10 of the dust collection box 55 of the second embodiment (halfway position holding type). FIG. 8 shows a connection member 56 of the dust collection box 55 of the second embodiment. Other configurations are the same as those of the dust collector 20 (full-range free tilt type) of the first embodiment exemplified above, so that the description and illustration thereof are omitted. The connection member 56 in the dust collection box 55 of the second embodiment is composed of a compression spring 57, a steel ball 58 biased in one direction by this, and a position holding plate 59 in which a holding hole 59a into which this is fitted is formed. A so-called detent mechanism (ball plunger) is provided.
The compression spring 57 is accommodated in one of the two holding holes 56c and 56c provided in the lid 56b that closes the right end of the cylindrical tilt support portion 56a. Both the holding holes 56c and 56c do not penetrate the lid 56b in the thickness direction. For this reason, the airtightness in the tilt support part 56a is ensured similarly to the tilt support part 23a. A steel ball 58 is held at the tip of the compression spring 57. On the other hand, a circular position holding plate 59 is attached along the bottom of the support recess 22c in the support recess 22c of the right box portion 22b. The edge of the position holding plate 59 is provided with a long groove-shaped holding hole 59a that is slightly curved along an arc and an engaging recess 59b that is formed by cutting from the edge. An engagement convex portion (not shown) on the support concave portion 22c is fitted into the engagement concave portion 59b, and the position holding plate 59 is prevented from rotating in the support concave portion 22c. With the position holding plate 59 interposed therebetween, the right end portion of the tilting support portion 56a is rotatably supported by the support recess portion 22c of the right box portion 22b. Note that the left end of the tilt support portion 56a is rotatably supported by the support recess 22c of the left box portion 22a in the same manner as the tilt support portion 23a. Similarly to the tilt support portion 23a, the tilt support portion 56a is provided with a connecting pipe portion 56c. The connection pipe portion 56 c is connected to the dust collection port 14 a of the cutting machine body 10.

A steel ball 58 is pressed against the position holding plate 59 by a compression spring 57. For this reason, when the dust collection box 55 tilts up and down with respect to the cutting machine body 10, the position holding plate 59 rotates integrally therewith, and therefore the position holding plate 59 rotates with respect to the lid 56c of the tilting support portion 56a. To do. In a range in which the steel ball 58 spring-biased by the compression spring 57 is pressed against the position holding plate 59, the dust collection box 55 is in a free tilting state in which it is tilted downward by its own weight. When the steel ball 58 is fitted into the holding hole 59 a by the tilting of the dust collection box 55, the steel ball 58 is held in the holding hole 59 a by the spring biasing force of the compression spring 57, and thereby the tilting range of the dust collection box 55. Is restricted to a part of the total tilting range. The biasing force (spring constant) of the compression spring 57 is set to a biasing force sufficient to overcome the gravity of the dust collection box 55 and hold it in the partial tilting range.
In the present embodiment, the relative positions of the steel ball 58 and the holding hole 59a are set so that the partial tilt range (about 15 °) is above the entire tilt range (about 45 °). For this reason, as shown in FIG. 9, when the cutting machine main body 10 is pushed down and positioned at the lower moving end and a certain range in front of it (position at the time of cutting), the steel ball 58 is fitted into the holding hole 59a, In this state, the rear side of the dust collection box 55 is tilted in the upward direction. Comparing FIG. 3 and FIG. 9, the cutting machine main body 10 is positioned at the lower moving end position (cutting processing position) in all cases, but in FIG. 3, the dust collection box 21 is held at a substantially horizontal position. In contrast, in FIG. 9, the dust collection box 55 is held at a position inclined in the forward tilt direction.
According to this configuration, since the dust collection box 55 is held at a position inclined in the forward tilt direction during the cutting process, the third dust collection box 40 is held at a position inclined in the forward tilt direction. For this reason, the chips discharged from the second dust collection box 30 flow into the front side (left side in FIG. 9) of the third dust collection box 40. That is, in the third dust collection box 40, the chips are collected from the front side thereof, so that the chips can be efficiently collected without blocking the discharge port 40a of the second dust collection box 30 with the chips. As a result, the dust collection capacity of the dust collection box 55 can be increased.
In the state shown in FIG. 9, when storing the cutting machine 1, the operator pushes down the rear part of the dust collection box 55 by hand, and the steel ball 58 is separated from the holding hole 59 a against the compression spring 57. Thus, the dust collection box 55 can be held in a horizontal position as shown in FIG. 3, and thus the cutting machine 1 can be stored in a state where the height direction is made compact.

According to the dust collection box 55 of the second embodiment configured as described above, the tilting range (tilting angle) with respect to the cutting machine body 10 is set to a range of the entire tilting range (about 45 °) and about 15 ° on the upper side. Thus, the dust collection box 55 can be held at a position inclined in the forward tilt direction during the cutting process. According to this, since the 3rd dust collection box 40 can be kept in the state inclined in the forward tilt direction at the time of cutting processing, the swarf discharged from the 2nd dust collection box 30 is made to flow in the 3rd dust collection box 40. The dust can be collected from the front side, whereby the dust collection capacity of the dust collection box 55 can be enhanced.
When the cutting machine 1 is stored, the cutting machine main body 10 is held at the lower moving end position, and the dust collection box 55 can be held at the horizontal position as in the first embodiment. It can be stored in a compact state.
Various modifications can be made to the second embodiment described above. For example, the configuration in which the tilting range of the dust collection box 55 is regulated by holding the spring-biased steel ball 58 in the holding hole 59a is exemplified, but the configuration in which the tilting position is fixed by tightening a screw, or the pin It is good also as a structure which controls a tilt position by insertion / extraction.
Furthermore, although the cyclone type dust collection box 21 provided with the first dust collection box 22, the second dust collection box 30, and the third dust collection box 40 is illustrated as a dust collection box, a cyclone mechanism (second dust collection box 30) is illustrated. ) May be omitted and a dust collection box including only the first dust collection box 22 may be used.
In the illustrated first and second embodiments, the box-shaped dust collection boxes 21 and 55 are exemplified as the dust collection box. However, the dust collection box formed by holding the cloth dust collection bag with the frame body is tilted and supported. It is good also as a structure provided so that it can tilt up and down via a part.
Moreover, it cannot be overemphasized that the dust collector which concerns on this invention is applicable not only to a portable tabletop cutting machine but to a stationary cutting machine.

It is a side view of the whole cutting machine provided with the dust collector which concerns on 1st Embodiment of this invention. This figure has shown the state in which a cutting machine main body is located in an upper moving end position. It is a perspective view of the whole cutting machine provided with the dust collector which concerns on 1st Embodiment of this invention. This figure has shown the state in which a cutting machine main body is located in an upper moving end position. It is a side view of the whole cutting machine provided with the dust collector which concerns on 1st Embodiment of this invention. This figure has shown the state in which a cutting machine main body is located in a lower moving end position. It is a perspective view of the whole cutting machine provided with the dust collector which concerns on 1st Embodiment of this invention. This figure has shown the state in which a cutting machine main body is located in an upper moving end position. It is a disassembled perspective view of the dust collector which concerns on 1st Embodiment. FIG. 6 is a cross-sectional view taken along line (6)-(6) in FIG. FIG. 6 is a plan view of the rear portion of the dust collection box, as viewed from (7) in FIG. 5. It is a perspective view of the tilting support part of the dust collector which concerns on 2nd Embodiment. It is a side view of the whole cutting machine provided with the dust collector which concerns on 2nd Embodiment. This figure has shown the state in which a cutting machine main body is located in a lower moving end position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cutting machine, W ... Cutting material 3 ... Table 6 ... Upper slide bar 10 ... Cutting machine main body 12 ... Electric motor 13 ... Cutting blade 14 ... Blade case, 14a ... Dust collector 20 ... Dust collector (1st Embodiment) Full range automatic tilt type)
21 ... Dust collection box (first embodiment)
22 ... 1st dust collection box 22a ... Left box part, 22b ... Right box part, 22c ... Support recessed part, 22d ... Opening part 22e ... Wall part, 22f ... Discharge port 23 ... Connection member 23a ... Tilt support part, 23b ... Connection Pipe portion, 23c ... lid, 23d ... opening 24 ... sealing member 25 ... vent 26 ... lid 29 ... locking lever 30 ... second dust collection box 31 ... cylindrical box 32 ... lid, 32a ... cylindrical body 40 ... third Dust collection box, 40a ... outlet 50 ... lower moving end regulating member 53 ... rotating body 55 ... dust collection box (second embodiment, halfway position holding type)
56 ... Connection member, 56a ... Tilt support part, 56b ... Lid, 56c ... Holding hole 57 ... Compression spring 58 ... Steel ball 59 ... Position holding plate

Claims (4)

In a cutting machine comprising a table for placing a cutting material and a cutting machine body supported so as to be tiltable up and down with respect to the table, the cutting machine body is wound up in a blade case by a cutting blade. Equipped with a dust collector to collect chips,
The dust collecting apparatus includes a dust collecting box for collecting chips and a connecting pipe portion that connects the dust collecting box to a dust collecting port of the blade case, and the connecting pipe portion includes a tilt support portion. The dust collecting box is connected to the cutting machine main body so as to be freely tiltable up and down relative to the cutting machine body and provided on the table side. A dust collector configured to be received from below by a lower moving end regulating member or to be held at a fixed position by bringing a lower moving end regulating member provided in the dust collection box into contact with the table side . The dust collection device according to claim 1, wherein a detent mechanism is interposed between the dust collection box and the tilting support portion, and the dust collection box can be held at a midway position in the tilting range. Dust collector. 2. The dust collector according to claim 1 , wherein the lower moving end regulating member has a biasing force in a direction to push back the dust collection box upward. 2. The dust collecting apparatus according to claim 1 , wherein the lower moving end regulating member includes a rotating body, and the rotating body is brought into contact with the other of the dust collecting box or the cutting machine body to move the lower moving end of the dust collecting box. A dust collector configured to regulate the end position.

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