JP2009241241A - Power tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jigsaw capable of storing a blade without making a body housing to a large size. <P>SOLUTION: A blade storage part 15 is provided on a base 7, the blade 4 and a hexagonal rod spanner 13 are arranged at the opposite form relative to a central axis A, and an urging member 20 for urging the blade 4 to the blade storage part 15 is further provided in order that the blade 4 is not removed/dropped off. According to such a constitution, a central axis portion can be used as a dust-collection port. Further, an area of angle adjustment of the base can be also enlarged, and it can have function as a conventional base as such. Further, the body can be also miniaturized and operability can be enhanced. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power tool such as a jigsaw, and more particularly to a power tool having a hexagonal bar wrench and a blade storage portion as its accessory parts.

  Patent Documents 1 and 2 disclose a jigsaw having a conventional blade storage unit. As shown in FIG. 13, the jigsaw disclosed in Patent Document 1 includes a base 101 that abuts on the workpiece W and slides on the workpiece W, and is disposed on the base 101. A main body housing 103 having a drive mechanism for the blade 102, and a blade housing portion 104 for housing the blade 102 is provided in the main body housing 103. The blade housing portion 104 has a recess into which the blade 102 can be inserted. Ribs for forming are provided.

  Therefore, the limited space on the upper surface of the base 101 can be used for other purposes, for example, a space for installing the dust collecting mechanism. Further, since the recesses are provided, the blade 102 accommodated in the blade accommodating portion 104 is not likely to fall off due to the influence of the vibration of the main body, and the blade 104 can be attached and detached neatly.

  On the other hand, as shown in FIG. 14, the jigsaw disclosed in Patent Document 2 includes a base 111 that abuts on a material to be cut and slides on the material to be cut, and a blade 112 that is disposed on the base 111 and is a blade 112. And a main body housing 113 containing the drive mechanism. The base 111 is located between the upper base 111a on the main body housing side, the lower side of the upper base 111a, one end side is locked with one end side of the upper base 111a, and the other end side is opened between the other end of the upper base 111a. A lower base 111b that has a portion and abuts against a material to be cut. Further, the upper base 111a of the base 111 is provided with an elastic member biased toward the lower base 111b and a storage chamber communicating with the opening.

  Therefore, the blade 112 and the hexagonal bar spanner 114 can be stored in the base 111 from the opening, and the blade 112 and the hexagonal bar spanner 114 are urged by the elastic member to the lower base 111b, so that they fall off. Can be prevented, and rattling due to vibration can also be prevented.

JP-A-10-217201 4-45621

  As shown in FIG. 12, since the blade housing portion 104 in the conventional jigsaw 100 is provided in the main body housing 103, the main body housing 103 becomes large in order to secure the blade housing portion 104. Further, since the blade housing portion 104 is determined by the size of the main body housing 103, the main body housing 103 must be enlarged to accommodate a long blade. Since there are various types of blades having different lengths and shapes, it is difficult to accommodate all these blades in the blade storage unit 104.

  In addition, when the blade storage portion is provided in the base 111 as shown in FIG. 13, various blades can be stored, but the blade storage portion is composed of two parts, the upper base 111a and the lower base 111b. A large space is required at the top. In order to adjust the angle of the base or the like, the space above the base is used, so the range of angle adjustment becomes narrow. Further, since two parts are used in the upper base 111a and the lower base 111b, the cost of the parts is also increased.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an electric tool that can solve the above-described problems and can configure the blade housing portion with a simple configuration at a low cost without increasing the size of the main body and the base.

  In order to solve the above-described problems, the present invention provides a power tool including a base that comes into contact with a workpiece and a main body housing that is disposed on the base and incorporates a blade drive mechanism. Provided is an electric tool provided with a storage section.

  According to such a configuration, since the blade storage portion is provided on the upper surface of the base, it is not necessary to configure the base with two parts, and the configuration can be simplified, and the stored state of the blade can be visually confirmed. Can be improved. Further, since the blade housing portion is provided in the base, the main body can be reduced in size and stable cutting work can be performed.

  The base is detachable from the main body housing by a fastening member, and a fastening member storage portion for storing the fastening member is provided in the base, and the blade storage portion and the fastening member storage portion are provided in the base housing. You may arrange | position symmetrically with respect to the longitudinal center axis | shaft of a base.

  According to such a configuration, since the storage portion for storing the blade and the fastening member is provided in the base, it can be stored in the base when not in use, so that it is possible to prevent these parts from being lost. In addition, the space on the upper surface of the base can be used effectively. Furthermore, when the main body is tilted with respect to the base, components such as the storage portion and the blade do not get in the way and the function as a conventional base can be maintained. Further, the central axis portion of the base can be used as another function such as a dust collection port.

  The base may be provided with a recess into which the blade can be inserted, and further provided with a biasing means for biasing the side surface of the blade to prevent the blade from coming off.

  According to such a configuration, the blade can be housed in the recess, and the side surface of the blade is further urged by the urging member, so that it is possible to prevent the blade from falling out of the housing portion due to vibration during cutting work.

  Further, the blade storage portion may be provided with a rib that engages with the blade when the blade is inserted into the other end side while the tip of the blade abuts on one end side.

  According to such a configuration, the blade end portion is pressed by the rib in addition to the urging member that urges the blade side surface, so that the blade can be further prevented from coming off.

  The base can be attached to and detached from the main body housing by a fastening member. A fastening member storage portion for storing the fastening member is provided in the base, and the blade and the fastening member are stored in the base. At this time, the fastening member may also serve as means for preventing the blade from coming off.

  According to such a configuration, since the storage portion for storing the blade and the fastening member is provided in the base, it can be stored in the base when not in use, so that it is possible to prevent these parts from being lost. Further, since the blade is prevented from being detached by the fastening member, it is not necessary to separately provide a blade retaining mechanism, and the configuration can be simplified.

  Further, an urging means for urging the blade and the fastening member when the blade and the fastening member are housed in the base may be provided.

  According to such a structure, since both a braid | blade and a fastening member can be urged | biased by a common urging means, it can be set as a cheap structure.

  The fastening member comprises a substantially L-shaped member, and the L-shaped member is housed along the longitudinal side surface of the base when housed in the fastening member housing portion; The fastening member storage portion has a guide portion for guiding one of the longitudinal surfaces of the second portion, and the blade has the fastening member that is guided by the fastening member. When guided by the portion, the second portion may prevent the second portion from coming off.

  According to such a configuration, since the blade is prevented from being detached by the fastening member, it is not necessary to provide a separate mechanism for preventing the removal, and an inexpensive configuration can be achieved.

  The blade storage portion and the fastening member storage portion may be provided on one side with respect to the central axis in the longitudinal direction of the base.

  With such a configuration, the space on the opposite side of the base can be used for other purposes.

  According to the present invention, the blade housing portion can be configured with a simple configuration at a low cost without increasing the size of the main body and the base. Further, the blade can be prevented from coming off with a simple configuration.

  An embodiment in which the electric tool of the present invention is applied to a jigsaw will be described with reference to FIGS.

  First, the jigsaw of this invention is demonstrated using FIG. 1 thru | or FIG. 1 is a side sectional view of the jigsaw of the present invention, FIG. 2 is a front view of the jigsaw of the present invention in a vertical state, and FIG. 3 is a front view of the jigsaw of the present invention in an inclined state. The jigsaw 1 houses a motor 3 in a housing 2, a fan 10 fixed coaxially with the output shaft of the motor 3, and a drive unit 5 for converting the rotation of the motor 3 into reciprocating motion of the blade 4. . A base 7 is detachably fixed to the bottom surface side of the housing 2 via a hexagon socket bolt 6. An opening into which a blade 4 described later is inserted is formed on one side in the longitudinal direction of the base 7, and chips generated when the workpiece is cut by the blade 4 are discharged on the other side, A dust collecting port 8 for attaching a dust collecting device for collecting chips is provided. A speed adjustment dial 9 for adjusting the reciprocating speed of the blade 4 is provided on the front side of the housing 2. When the jigsaw 1 is driven, the motor 3 rotates by connecting the jigsaw 1 to a power source and turning on the trigger 11. The rotation of the motor 3 is transmitted to the drive unit 5, and the rotational motion of the motor 3 is converted into the reciprocating motion of the blade 4 by the drive unit 5. The workpiece is cut by the reciprocating motion of the blade 4.

  Normally, as shown in FIG. 2, the jig 2 is positioned perpendicular to the base 7 so that the workpiece 2 can be cut vertically, but the housing 2 (the jigsaw 1) is attached to the base 7. It is also possible to cut the workpiece W at an arbitrary angle by tilting it. In this case, as shown in FIG. 3, if the bolt 6 is loosened to incline the housing 2 at a desired angle with respect to the base 7 and then the bolt 6 is tightened again, the base 7 is at a desired angle with respect to the housing 2. Inclined cutting is possible because it is fixed to the surface.

  Next, the structure of the base 2 of the present invention will be described with reference to FIGS. 4 is a top view showing a first embodiment of the base of the jigsaw of the present invention, FIG. 5 is a cross-sectional view taken along the line AA of FIG. 4, FIG. 6 is a cross-sectional view taken along the line BB of FIG. FIG. 8 is a top view showing a third embodiment of the base of the jigsaw according to the present invention, FIG. 9 is a top view showing the fourth embodiment of the base of the jigsaw according to the present invention, and FIG. 9 is a sectional view taken along line AA in FIG. 11, FIG. 11 is a sectional view taken along line BB in FIG. 9, and FIG. 12 is an enlarged view of a portion C in FIG.

  4 and 6, the base 7 includes a base abutting portion 12 that abuts the housing 2, a spanner accommodating portion 14 that accommodates a hexagonal bar spanner 13 that serves as a fastening member, and a blade accommodating portion 15 that accommodates the blade 4. , And an opening 16 through which the blade 4 passes. The base abutting portion 12 is provided so as to protrude in an arc shape from a base upper surface 7b that faces the base bottom surface 7a that abuts the workpiece W and is located on the housing 2 side. The base abutting portion 12 is provided with a bolt hole 17 through which the bolt 6 passes. The bolt hole 17 extends to the first hole portion 17a extending in the longitudinal direction of the base abutting portion 12 and the first hole portion 17a. The second hole portion 17b extends in the arc direction in the vertical direction and has a substantially T shape. A hollow is formed inside the arcuate portion of the base abutting portion 17, and this hollow functions as a dust collecting port 8 for discharging cut chips and connecting a dust collecting device.

  Further, an inclined guide portion 18 is provided on the side of the base contact portion 12 opposite to the opening 16 with respect to the bolt hole 17. The inclined guide portion 18 is provided so that a projection (not shown) provided on the housing 2 (jigsaw body) side contacts and guides the projection. The inclined guide portion 18 includes a first guide portion 18a extending in the longitudinal direction of the base contact portion 12 and a second guide portion extending in the arc direction in a direction perpendicular to the first hole portion 17a, and is substantially T-shaped. It is configured.

  When the housing 2 (jigsaw body) is in a vertical state with respect to the base 7, the bolt 6 is inserted into the first hole portion 17 a of the bolt hole 17. At this time, since a projection (not shown) of the housing 2 is guided by the first guide portion 18a of the inclined guide portion 18, the housing 2 is maintained in a vertical state with respect to the base 7, and the bolt 6 is tightened in this state. Cutting work in a vertical state becomes possible. Since the width of the projection is the same as the width of the first guide portion 18a in the arc direction, the housing 2 cannot be tilted in the arc direction (inclination direction) with respect to the base 7, so that the vertical state can be maintained. it can.

  On the other hand, when the housing 2 (jigsaw body) is inclined at an arbitrary angle with respect to the base 7, the base 7 is moved in the longitudinal direction of the base 7 with respect to the housing 2 (the left direction in FIG. 4). Is inserted into the second hole 17 b of the bolt hole 17. At this time, the protrusion on the housing side is disengaged from the first guide portion 18a of the inclined guide portion 18 and is engaged with the second guide portion 18b. Therefore, since the protrusion is guided and moved by the second guide portion 18b by inclining the housing 2 with respect to the base 7, if the bolt 6 is tightened at a desired angle, cutting operation at a desired inclination angle is possible. It becomes.

  The spanner storage portion 14 stores a hexagonal bar spanner 13 for fastening bolts 6 for fixing the base 7 to the housing 2. The hexagon stick spanner 13 has a substantially L shape. The spanner 13 is formed of a first portion 13a extending in the longitudinal direction of the base 7 when the spanner 13 is stored in the spanner storage portion 14, and a second portion 13b extending substantially perpendicular to the first portion 13a. The first portion 13a of the spanner 13 is stored in a first storage portion 14a extending in the longitudinal direction of the base 7 of the spanner storage portion 14, and the second portion 13b is a second storage portion provided substantially at a right angle to the first storage portion 14b. 14b. A recess for holding the first portion 13a of the spanner 13 is formed in a part of the first storage portion 14a. When the spanner 13 is stored in the spanner storage portion 14, the first portion 13a is slid into the first storage portion 14a so that the second portion 13b of the spanner 13 faces upward with respect to the base 7, and is inserted into the recess 14c. Then, the second portion 13b is rotated to store the second portion 13b in the second storage portion 14b. Since the spanner 13 is held by the concave portion 14c and the second storage portion 14b, the spanner 13 is prevented from coming off. Moreover, since the spanner 13 is urged | biased by the spanner urging | biasing member 19 at the spanner accommodating part 14 side, the removal prevention of the spanner 13 is further strengthened.

  The blade storage unit 15 is for storing the blade 4, and stores the blade 4 in the blade storage unit 15 by sliding the blade 4 in the longitudinal direction of the base 7. The blade housing 15 is provided with two recesses 15a into which the blade 4 is inserted, and holds the blade 4. In addition, the recessed part 15a is not restricted to two places. The base 7 is provided with a blade urging member 20 for urging the blade 4 stored in the blade storage portion 15 to prevent the blade 4 from coming off.

  As shown in FIG. 6, the blade storage portion 15 stores the blade 4 in the vertical direction, that is, with the blade portion of the blade 4 facing the bottom surface 7 b of the base 7. When the blade 4 is slid to the blade storage portion 15 and is slid until the blade tip comes into contact with the storage portion front end portion 15b, the blade 4 is stored in the blade storage portion 15. Since the blade 4 is restricted in movement in the vertical direction (vibration) by the recesses 15a provided at two locations, and is restricted in movement in the left-right direction (side direction of the blade) by the blade biasing member 20, the blade 4 is stored in the storage portion. It will not fall out of 15. The opening 15c is provided when the base 7 is formed, particularly when the recess 15a is formed. Further, when the blade 4 is housed in the blade housing portion 15, the blade 4 does not protrude from the upper surface 7 a of the base 7.

  Further, as shown in FIG. 5, the spanner 13 and the blade 4 are held by the concave portions 14c and 15a of the respective storage portions and are urged to the base 7 by the urging members, so that they fall off from the base 7 due to vibration or the like. There is nothing. Further, since the blade housing portion 15 is partially surrounded rather than surrounded by the recess 15a, the holding state of the blade 4 can be visually confirmed, so that workability is improved. Can do. The same applies to the spanner storage portion 14, and the loss of the spanner 13 and the blade 4 can be prevented.

  Further, as shown in FIG. 4, the spanner storage portion 14 and the blade storage portion 15 are provided symmetrically with respect to the central axis A, so that the lateral width of the base 7 can be minimized and the space above the base is effective. Can be used. Furthermore, each storage unit can handle the base 7 without the need for special work, so the base itself does not need to be a two-part configuration, and can be configured as a single part. Can be formed. Furthermore, by providing each storage portion in the base 7, it is not necessary to provide a storage portion in the housing 2, and an increase in the size of the housing 2 (jigsaw body) can be prevented.

  Further, since the urging members 19 and 20 are configured to effectively use the space on the base 7 and urge the spanner 13 and the blade 4 from the side surface side, the base 7 can be prevented from being enlarged, The wrench 13 and the blade 4 can be further prevented from coming off together with the recesses 14c and 15a.

  In FIG. 4, rubber that is an elastic body is used for the blade urging member 20, but a leaf spring 20a may be used as in the second embodiment shown in FIG. In this embodiment, it is assumed that two blades are accommodated by changing the urging force by the urging member 20 (20a). However, when the number of blades 4 to be accommodated is changed or the blade thickness is large. Even things can be handled. Further, although the blade 4 is stored with the blade portion of the blade 4 facing the base 7, the blade 4 is not limited to this embodiment.

  Next, a third embodiment will be described with reference to FIG. In FIG. 8, the blade storage portion 15 and the spanner storage portion 14 are provided on the same side with respect to the center line A of the base 7. The blade 4 is stored in the blade storage unit 15, and the spanner 13 is stored in the spanner storage unit 14. Since the spanner 13 is L-shaped as described above, when the second portion 13 b of the spanner 13 is stored in the second storage portion 14 b of the spanner storage portion 14, the blade 4 moves to the tip of the blade storage portion 15. The blade 15 is prevented from coming off by the portion 15b, the second portion 13b of the spanner 13, and the recess 15a. Therefore, it is not necessary to separately provide a retaining member for the blade 4, and a retaining mechanism for the blade 4 can be configured with a simple configuration. Further, since the blade storage portion 15 and the spanner storage portion 14 are provided close to each other, the biasing members of the blade 4 and the spanner 13 are not provided, and each is biased by one biasing member 21 to prevent the blade storage portion 15 and the spanner storage portion 14 from coming off. Since it can be performed, the retaining mechanism can be configured at low cost without increasing the number of parts. In addition, since the passage portion 14d for removing the blade 4 when the blade 4 is slid out of the blade housing portion 15 is provided in the second portion 14b of the spanner housing portion 14, the spanner 13 rotates the first portion 13a. By rotating the second portion 13b as a shaft, the blade 4 is prevented from coming off, and the blade 4 can be easily slid from the passage portion 14d. Furthermore, the opposite side of the center line A can be used as another application.

  Next, a fourth embodiment will be described with reference to FIGS. 9 is a top view showing a fourth embodiment of the base of the jigsaw of the present invention, FIG. 10 is a cross-sectional view taken along the line AA in FIG. 9, FIG. 11 is a cross-sectional view taken along the line BB in FIG. It is an enlarged view. 9 is substantially the same configuration as FIG. 4 showing the first embodiment, and the mechanism for preventing the blade 4 from coming off by the vibration of the jigsaw 1 is different. As shown in FIGS. 9 and 10, the base 7 basically has the same configuration as that of the first embodiment shown in FIG. A different configuration from the first embodiment is that a protrusion 22 for retaining the blade 4 is provided as shown in FIG. As shown in FIG. 11, the protrusion 4 that engages the protrusion 4 a of the blade 4 is provided in the blade housing portion 15 to prevent the blade 4 from falling off. When the blade 4 is housed in the blade housing portion 15, the blade 4 is slid into the blade housing portion 15 so as to be substantially parallel (laterally) to the base bottom surface 7 b and the tip of the blade 4 comes into contact with the housing portion tip portion 15 b. The blade is rotated so that the blade portion faces the lower side (base bottom surface side 7b). At this time, since the protrusion 4a of the blade 4 is positioned on the tip 15b side of the convex portion 22 of the blade storage portion 15, the convex portion 22 and the protrusion 4a are engaged to prevent the blade 4 from falling out of the blade storage portion 15. can do.

It is side surface sectional drawing of the jigsaw of this invention. It is a front view of the jigsaw of this invention which shows a right-angle cutting state. It is a front view of the jigsaw of the present invention showing an inclined cutting state. It is a top view of the base which shows 1st Embodiment of this invention. It is AA sectional drawing in FIG. It is BB sectional drawing in FIG. It is a top view of the base which shows 2nd Embodiment of this invention. It is a top view of the base which shows 3rd Embodiment of this invention. It is a top view of the base which shows 4th Embodiment of this invention. It is AA sectional drawing in FIG. BB sectional drawing in FIG. It is the C section enlarged view in FIG. It is a jigsaw having a conventional blade housing part. It is a jigsaw having a conventional blade housing part.

Explanation of symbols

1 is a jigsaw, 2 is a housing, 3 is a motor, 4 is a blade, 5 is a drive unit, 6 is a bolt, 7 is a base, 8 is a dust collecting port, 9 is a speed adjustment dial, 10 is a fan, 11 is a trigger, 12 Is a base abutting portion, 13 is a hexagon stick spanner, 14 is a spanner storage portion, 14a is a first storage portion, 14b is a second storage portion, 14c is a recess, 15 is a blade storage portion, 15a is a recess, and 16 is an opening. 17 is a bolt hole, 17a is a first hole portion of the bolt hole, 17b is a second hole portion of the bolt hole, 18 is an inclined guide portion, 18a is a first guide portion of the inclined guide portion, and 18b is a first guide portion of the inclined guide portion. 2 guide portions, 19 is a spanner biasing member, 20 is a blade biasing member, and 22 is a convex portion.

Claims (8)

In an electric tool comprising a base that comes into contact with a workpiece and a main body housing that is disposed on the base and incorporates a blade drive mechanism.
An electric tool characterized in that the blade housing portion is provided on an upper surface of the base.   The base is detachable from the main body housing by a fastening member, and a fastening member storage portion for storing the fastening member is provided in the base, and the blade storage portion and the fastening member storage portion are disposed on the base. The power tool according to claim 1, wherein the power tool is arranged symmetrically with respect to the longitudinal center axis.   The concave portion into which the blade can be inserted is provided in the base, and further, an urging means for urging the side surface of the blade to prevent the blade from coming off is provided. Power tools.   2. The blade storage portion according to claim 1, wherein a tip of the blade abuts on one end side and a rib that engages with a convex portion of the blade when the blade is inserted on the other end side. The power tool according to claim 3.   The base is detachable from the main body housing by a fastening member. When the base and the fastening member storage portion for storing the fastening member are provided in the base, the blade and the fastening member are stored in the base. The electric tool according to claim 1, wherein the fastening member also serves as a means for preventing the blade from coming off.   6. The electric tool according to claim 5, further comprising an urging unit that urges the blade and the fastening member when the blade and the fastening member are housed in the base. The fastening member is formed of a substantially L-shaped member, and the L-shaped member is housed along a longitudinal side surface of the base when housed in the fastening member housing portion; A second part extending substantially vertically from one part,
The fastening member storage portion has a guide portion that guides one of the longitudinal surfaces of the second portion, and the blade is prevented from being detached by the second portion when the fastening member is guided by the guide portion. The power tool according to claim 5 or 6, wherein the power tool is provided.   The power tool according to any one of claims 5 to 7, wherein the blade storage portion and the fastening member storage portion are provided on one side with respect to a longitudinal central axis of the base.

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