JPH1134002A - Lower limit stopper of circular sawing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable setting easily even in a small-sized model by a method in which a lower limit change-over member is moved to a lower limit regulating position with which a lower limit regulating member contacts or a lower limit releasing position through which it passes without contacting so as to change over the validity and invalidity of a stopper. SOLUTION: When a lower limit change-over member 25 is positioned at a lower limit release position, a positioning projection is inserted into the first recession. By this operation, the member 25 is position-held at a lower limit regulating position. In a state in which the member 25 is held at the lower limit regulating position, since the member 25 is not positioned downward from a lower limit regulating bolt 22, when a circular sawing machine main body 4 is moved downward, the bolt 22 passes by the side of the member 25 without colliding with it. In this way, there is no need to secure a space for moving an arm as before in the base end part 4a of the saw main body 4 so that a stopper 20 can be easily applied even to a sized circular sawing machine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a circular sawing machine in which a circular saw body having a circular saw blade is supported so as to be vertically movable with respect to a table on which a cutting material is placed. The present invention relates to a stopper device for regulating a lower limit position of a main body.

[0002]

2. Description of the Related Art Conventionally, as this type of stopper device,
For example, there is one disclosed in JP-A-6-71603. In this conventional stopper device, as shown in FIG. 9, which employs FIG. 11 of the publication, an arm 85 is turned on side surfaces of a base end portion 68 of a circular saw main body 4 via support portions 80, 80 and a support shaft. The adjusting bolt 84 is mounted movably on the tip end of the rotation of the arm 85, and the adjusting bolt 84 is brought into contact with the bracket 71 that tilts and supports the circular saw body 4 via the support shaft 69. The configuration was such that a projection 87 was provided.

According to this configuration, if the arm 85 is rotated to the first position where the adjustment bolt 84 is located on the tilting fulcrum side (the support shaft 69 side) of the circular saw main body 4, the circular saw main body 4 is lowered. When tilted, the tip of the adjustment bolt 84 is
, Thereby restricting the lower limit position of the circular saw main body 4. This lower limit position corresponds to the arm 8 of the adjustment bolt 84.
It can be set arbitrarily by adjusting the screwing amount with respect to 5. Conversely, the arm 85 is
When the circular saw body 4 is rotated to the position, when the circular saw body 4 is tilted downward, the adjustment bolt 84 does not come into contact with the locking projection 87, so that the lower limit of the circular saw body 4 is not restricted by the stopper device. .

Aside from the stopper device, a stopper bolt 78 is attached to the base end 68 of the circular saw main body 4, and a stopper 79 to which the stopper bolt 78 abuts is provided on the bracket 71. This also limits the lowering limit of the circular saw body 4,
The lowering limit regulated by the stopper bolt 78 is a fixed one determined by the positional relationship between the saw blade and the blade plate (hereinafter, referred to as the lowest lowering limit), and the stopper device is provided separately from the stopper mechanism. Thus, the lowering limit is set above the lowermost lowering limit, so that various forms of cutting operations such as grooving can be conveniently performed.

[0005]

As described above, the conventional stopper device has a structure in which the arm 85 to which the adjusting bolt 84 is attached is turned substantially 180 degrees to switch the validity and invalidity of the stopper device. 85 has a relatively large moving range, and therefore cannot be applied particularly to a model in which it is difficult to secure the moving range of the arm 85 at the base end of the circular saw main body, such as a small desktop circular saw machine. there were. Then, an object of the present invention is to provide a stopper device which can be set without difficulty even in a small model.

[0006]

Therefore, in the stopper device according to the present invention, the lower limit position of the circular saw main body in the circular saw machine in which the circular saw main body is supported so as to be vertically movable with respect to the table is regulated. A lower-limit regulating member provided on the circular saw main body side and a lower-limit switching member provided on the table side, wherein the lower-limit switching member is a lower-limit regulating position at which the lower-limit regulating member abuts. Alternatively, the stopper device may be moved to a lower limit release position where the stopper device passes without contacting the stopper device to switch between valid and invalid.

According to this stopper device, the lower limit switching member provided on the table supporting the circular saw main body is moved instead of moving the lower limit regulating member provided on the circular saw main body side, whereby the stopper device is moved. , It is not necessary to secure a space for switching the position of the arm 85 at the base end of the circular saw main body as in the prior art. Therefore, even a small circular saw The stopper device can be easily applied. Here, the circular saw main body side refers to a portion or a member that moves up and down integrally with the circular saw main body, in addition to the circular saw main body itself, and the table side refers to the table itself and the vertical movement with respect to the table. Refers to parts or members that are not to be used.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS.
A description will be given based on FIG. FIG. 1 shows an entire circular saw 1 provided with a stopper device 20 according to the present embodiment. In the drawing, reference numeral 2 denotes a table on which a cutting material is placed, which is rotatably supported by a base 3. A slide bar 5 is supported on the lower surface of the table 2 via a bearing 6 so as to be movable in the axial direction (left and right directions in the drawing). A left-right tilting mechanism 7 is attached to the rear end (left end in the figure) of the slide bar 5, and the circular saw main body 4 can be tilted up and down via a tilting fulcrum 9 at the tip of an arm 8 of the left-right tilting mechanism 7. Supported.

This embodiment is characterized by a stopper device 20 for regulating the lower limit position of the circular saw main body 4.
Other configurations such as the table 2, the circular saw main body 4, the left-right tilting mechanism 7, and the like do not need to be changed in particular, and therefore description thereof is omitted.

The details of the stopper device 20 of the present embodiment are shown in FIG. Base end 4a of circular saw body 4
On the side surface of the support piece 21 is formed in a laterally extending shape,
A lower limit regulating bolt 22 having a knob 22a on the head and a fixing bolt 23 for regulating the lowermost limit of the circular saw main body 4 are attached to the support piece 21.

By rotating the lower limit regulating bolt 22, the tip thereof can be moved up and down, so that the lowering limit of the circular saw body 4 can be set arbitrarily within a certain range. The lower limit regulating bolt 22 corresponds to an embodiment of the lower limit regulating member described in the claims. In addition,
By rotating the fixing bolt 23, the lowermost limit of the circular saw main body 4 can be changed, but the lowermost limit is determined by the positional relationship between the saw blade 4b and the blade plate as described above. Yes, it is set as a fixed lower limit in normal use.

Next, a pedestal 24 is provided at the tip of the arm 8 of the left-right tilting mechanism 7 so as to protrude forward, and an upper surface 24a of the pedestal 24 has a plate-shaped lower limit switching member
5 are attached. As shown in FIG. 4, the lower limit switching member 25 is rotatably supported in a certain range in a lateral direction (a surface direction of the lower limit switching member 25) via a support shaft 26. FIG. 4A shows a state where the lower limit switching member 25 is located at the lower limit release position, and FIG. 4B shows a state where the lower limit switching member 25 is located at the lower limit regulating position.
The lower limit regulating position refers to a position where the lower limit regulating bolt 22 abuts when the circular saw main body 4 moves down to a certain position, and as a result, a position where the lower limit of the circular saw main body 4 is regulated by the stopper device 20. The lower limit release position means a position where the lower limit regulating bolt 22 does not abut even when the circular saw main body 4 moves down. As a result, the lower limit of the circular saw main body 4 is not restricted by the stopper device 20, and The position where the lower limit of the saw body 4 is regulated to the lowermost limit by the fixing bolt 23.

A circular projection 24b is integrally formed substantially at the center of the upper surface 24a of the pedestal 24. The protrusion 24b protrudes upward (toward the front in FIG. 4) at a height corresponding to the plate thickness of the lower limit switching member 25. When the circular saw main body 4 is moved downward with the stopper device 20 disabled, the fixing bolt 2
3, the lowermost limit of the circular saw body 4 is regulated. Therefore, the protrusion 24b corresponds to the stopper 79 in FIG.

The upper surface 24a of the pedestal portion 24
Two recesses 24c and 24d are formed on the tip side (the right side in the figure) of the protrusion 24b. The first concave portion 24c on the upper side in the figure is formed by cutting a predetermined depth (a depth in a direction orthogonal to the paper surface) from the upper edge of the upper surface 24a in the figure, and the second concave portion 24d on the lower side in the figure is formed in a circular shape with the same depth. Have been.

On the other hand, the lower limit switching member 25 is fitted in a relief recess 25a for releasing the projection 24b when the lower limit switching member 25 is positioned at the lower limit release position, and in the first recess 24c or the second recess 24d. In addition, a positioning protrusion 25b for holding the lower limit switching member 25 at the lower limit releasing position or the lower limit regulating position is formed.
The relief concave portion 25a is formed to have a diameter (width) into which the protruding portion 24b can be inserted by being cut from the upper end edge in the drawing. The positioning projection 25b is formed by denting the upper surface of the lower limit switching member 25 and locally deforming in the thickness direction, and slightly protrudes toward the pedestal portion 24 (lower surface side).

According to the stopper device 20 of this embodiment configured as described above, when the lower limit switching member 25 is located at the lower limit release position as shown in FIG. 24c, whereby the lower limit switching member 25 is held at the lower limit release position. In a state where the lower limit switching member 25 is held at the lower limit releasing position, the lower limit switching member 25 is not located below the lower limit regulating bolt 22, so that when the circular saw main body 4 is moved downward as shown in FIG. The lower limit regulating bolt 22 passes by the side without contacting the lower limit switching member 25. In this case, since the fixing bolt 23 abuts on the projection 24b as shown in the figure, the lower limit of the circular saw main body 4 is restricted to the lowermost limit.

On the other hand, when the lower limit switching member 25 is positioned at the lower limit regulating position as shown in FIG. 4B, the positioning projection 25b fits into the second concave portion 24d, whereby the lower limit of the lower limit switching member 25 is reduced. The restriction position is maintained.
In the state where the lower limit switching member 25 is located at the lower limit regulating position, the lower limit switching member 25 is located below the lower limit regulating bolt 22, so that the circular saw main body 4 is moved down to a certain position as shown in FIG. Then, the lower limit regulating bolt 22 abuts against the lower limit switching member 25, whereby the lower limit of the circular saw body 4 is restricted to be higher than the lowermost limit. In this case, as shown in the figure, the fixing bolt 23 floats from the upper surface of the projection 24b and thus from the upper surface of the lower limit switching member 25.

To change the position of the lower limit switching member 25 from the lower limit releasing position to the lower limit regulating position or vice versa,
What is necessary is just to push the front-end | tip with a finger | toe and to rotate only a fixed angle. Due to the turning operation force, the lower limit switching member 25 can be turned by the positioning projection 25b coming out of the first concave portion 24c or the second concave portion 24d while slightly bending in the direction of floating from the pedestal portion 24. After the position change, the positioning protrusion 25b is again moved to the first or second concave portion 24c, 24.
By fitting into d, the lower limit switching member 25 is held in position.

As described above, the stopper device 2 of the present embodiment
According to 0, instead of moving the lower limit regulating bolt 22 provided on the circular saw main body 4, the lower limit switching member 25 provided on the table side (arm 8) supporting the circular saw main body 4 is moved. Since the configuration is such that the stopper device 20 is switched between valid and invalid, it is not necessary to secure a space for moving the arm 85 at the base end portion 4a of the circular saw main body 4 as in the related art. Even if there is, the stopper device 20 can be easily applied.

Various modifications can be made to the embodiment described above. For example, although the configuration in which the lower limit switching member 25 rotates around the support shaft 26 has been illustrated, a configuration in which the lower limit switching position and the lower limit release position are switched by sliding in the plane direction (for example, the left and right direction in FIG. 4). It may be.

The lower limit member may be a pin or other abutting means instead of the lower limit bolt 22 described above, and the lower limit member may be vertically moved with respect to the support piece 21 as illustrated. You do not need to be able to enter and exit.

Further, a bolt for adjusting the lower limit may be attached to the lower limit switching member, and the bolt may be movable between a lower limit regulating position and a lower limit releasing position. In this case, the lower limit regulating member on the circular saw main body side may have a configuration in which a contact piece that comes into contact with the bolt is extended when the bolt is located at the lower limit restricting position.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention, and is an overall side view of a circular saw machine.

FIG. 2 is a side view of the stopper device. This figure shows a state in which the circular saw main body is located at the raised position and the lower limit regulating member is separated from the lower limit switching member.

FIG. 3 is a side view of the stopper device. This figure shows a state where the circular saw main body is lowered and the lower limit regulating member is in contact with the lower limit switching member.

4A is a plan view showing a state in which a lower limit switching member is located at a lower limit release position; FIG.
(B) is a top view showing the state where the lower limit switching member is located in the lower limit regulation position.

FIG. 5 is a partially cutaway side view of the stopper device. This figure shows a state in which the circular saw main body is located at the raised position and the lower limit regulating member is separated from the lower limit switching member.

FIG. 6 is a partially cutaway side view of the stopper device. This figure shows that as a result of lowering the circular saw main body in a state where the lower limit switching member is located at the lower limit releasing position (the state of FIG. 4A), the lower limit regulating member passes without contacting the lower limit switching member. And the state in which the fixing bolt 23 is in contact with the projection 24b, that is, the state in which the circular saw main body is lowered to the lowermost limit.

FIG. 7 is a view taken in the direction of the arrow (7) in FIG. 6, and is a plan view of the stopper device switched to the invalid side;

FIG. 8 is a view taken in the direction of the arrow (8) in FIG. 3, and is a plan view of the stopper device switched to the effective side.

FIG. 9 is a side view of a conventional stopper device.
FIG. 12 is a diagram in which FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Circular saw machine 2 ... Table 4 ... Circular saw main body, 4a ... Base end part 8 ... Arm 9 ... Tilting fulcrum 20 ... Stopper device 22 ... Lower limit regulating bolt (lower limit regulating member) 24 ... Pedestal 25 ... Lower limit switching member 84 ... Adjustment bolt 85 ... Arm 87 ... Locking projection

Claims (1)

[Claims] 1. A stopper device for regulating a lower limit position of a circular saw main body in a circular saw machine in which a circular saw main body is supported to be vertically movable with respect to a table, the stopper device being provided on the circular saw main body side. A stopper having a lower limit regulating member and a lower limit switching member provided on the table side, and moving the lower limit switching member to a lower limit regulating position where the lower limit regulating member abuts or a lower limit releasing position where the lower limit regulating member passes without abutting. A lower limit stopper device for a circular saw machine, characterized in that the device is switched between valid and invalid.