JP5160851B2 - Cutting machine - Google Patents

Description

  The present invention relates to a cutting machine such as a desktop circular saw machine in which a main body having a rotary blade is provided above a base on which a material to be cut can be set so as to be movable up and down.

In a tabletop circular saw, which is an example of a cutting machine, a main body having a rotary blade is pivotally mounted on an arm standing behind the base so that the main body can be moved up and down, and the base is set on the base by lowering the main body. Cutting is possible with a rotary blade. A guide fence is installed on the base in the left-right direction, and the material to be cut is pressed against a guide surface perpendicular to the upper surface of the base, thereby facilitating positioning of the material to be cut.
In addition, a clearance groove is provided in the center of the base or the turntable provided on the base to allow the rotary blade to be cut when the main body is lowered, and a blade plate is provided at the opening of the clearance groove. ing. This blade plate, for example, as disclosed in Patent Document 1, a pair of strips made of synthetic resin or the like is arranged on the left and right sides of the cutting position in a manner leaving a slit into which the rotary blade can enter, When cutting the material to be cut, it plays the role of suppressing the standing by contacting the lower surface of the material to be cut on both sides of the cut edge.

Japanese Utility Model Publication No. 6-5820

  However, since this blade plate is a separate member from the base and turntable, there may be a step where the upper surface of the band plate is lower than the upper surface of the base or turntable due to dimensional tolerances, etc. Occurrence could not be sufficiently suppressed.

  Accordingly, an object of the present invention is to provide a cutting machine capable of effectively exhibiting the effect of preventing the flaking of a material to be cut by a blade plate regardless of dimensional tolerances.

In order to achieve the above object, the invention according to claim 1 is characterized in that the blade edge plate is elastically supported by an elastic member provided in the relief groove at a position where the upper surface is equal to or higher than the upper surface on the base side. It is what.
According to a second aspect of the present invention, in the configuration of the first aspect, the blade edge plate interferes with the blade edge plate when positioning the workpiece even if the blade edge plate is supported at a position where the upper surface is equal to or higher than the upper surface on the base side. In order to make it difficult to do so, the blade plate is a pair of left and right strips that form a slit between them, and the elastic member is a leaf spring that supports an inclined posture that gradually increases as each strip approaches the slit side. It is characterized by this.
In order to achieve the above object, the invention according to claim 3 supports the blade edge plate so that the position in the vertical direction can be adjusted by a screw feed mechanism provided in the relief groove, and the screw feed mechanism is It is characterized by including an urging means for urging the mouth plate downward .
According to a fourth aspect of the present invention, in the configuration of the third aspect, in order to make it possible to easily adjust the vertical position of the blade edge plate, the screw feed mechanism is connected to the block body below the blade edge plate. And a biasing means that biases the block body and the blade plate downward, and a distance between the bottom surface of the escape groove and the block body that is screwed into the block body and protrudes and descends below the block body by a rotation operation. Is an adjustable screw member.
In the present invention, the “base side” means not only the base itself, but also a turntable on which a workpiece is set by being horizontally rotated on the base.

According to the first and third aspects of the present invention, the upper surface of the blade edge plate can be accurately matched with the upper surface on the base side when the workpiece is positioned. Therefore, regardless of dimensional tolerances or the like, the flaking prevention effect of the material to be cut by the blade plate can be effectively exhibited.
According to the second aspect of the invention, in addition to the effect of the first aspect, even when the blade edge plate is supported at a position where the upper surface is equal to or higher than the upper surface on the base side, In addition to being less likely to interfere with the mouth plate, the band plate can be pressed against the material to be cut with an elastic force that increases as it approaches the cut edge, and can be prevented more effectively.
According to the invention described in claim 4, in addition to the effect of claim 3, the vertical position of the blade edge plate can be easily adjusted.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Form 1]
FIG. 1 is a plan view of a base portion of a tabletop circular saw machine which is an example of a cutting machine. The tabletop circular saw machine 1 has a circular turntable 3 mounted on a base 2 so as to be horizontally rotatable at a substantially central position. In the center of the rear of the turntable 3 (upper side in FIG. 1), a main body (not shown) provided with a saw blade as a rotary blade that is rotated by a motor is connected in a vertically movable manner. Further, on the left and right sides of the base 2, guide fences 4 that cross the left and right sides of the turntable 3 in a non-contact manner are fixed with bolts. The guide fence 4 includes a pair of left and right guide portions 5 and 5 and a semicircular detour portion 6 that bypasses the blade edge plate 7 provided in the center of the turntable 3 and connects the guide portions 5 and 5. Thus, the front surface of each guide portion 5 is perpendicular to the upper surface of the turntable 3.

  As shown in FIG. 2, the blade opening plate 7 forms a slit 11 through which the saw blade 9 can pass between the openings of the escape groove 8 recessed in the front-rear direction at the center of the turntable 3. The pair of strips 10 and 10 made of synthetic resin are supported by plate springs 12 and 12 as a pair of front and rear elastic members provided along the outer edge. Yes. This leaf spring 12 is fixed to a mounting recess 13 whose outer end is recessed below the upper surface of the turntable 3 at the outer edge of the escape groove 8 with a screw 15 through a long hole 14 formed in the left-right direction. The band strip 10 is elastically supported by inserting and fixing the locking piece 16 folded upward at the end on the center side to the lower surface of the band plate 10. Is an inclined posture that gradually increases as it approaches the slit 11 from the outside. Due to this inclined posture, the upper surface of each strip 10 protrudes slightly above the upper surface of the turntable 3. In addition, the space | interval of the slit 11 can be adjusted by changing the screwing position with respect to the long hole 14 in the left-right direction.

  When the table-top circular saw 1 configured as described above is set on the upper surface of the turntable 3 with the material to be cut pressed against the front surface of the guide fence 4, the material to be cut is each strip 10 of the blade plate 7. Is pushed down against the bias of the leaf spring 12 so that the upper surface of each band plate 10 coincides with the upper surface of the turntable 3. After positioning the material to be cut in this manner, when the main body with the saw blade 9 rotated is lowered, the material to be cut can be cut at right angles to the guide fence 4. At this time, since the two strips 10 of the blade edge plate 7 are pressed against the lower surface by the elasticity of the leaf spring 12, the standing of the cut edge can be suppressed. Note that when the turntable 3 is rotated, the angle of the saw blade 9 is changed in the horizontal direction. When the main body is tilted, the angle of the saw blade 9 is changed in the vertical direction as shown by a two-dot chain line in FIG. Inclination cutting can be performed, but in any case, if the blade edge plate 7 is used, an effect of preventing standing can be obtained.

As described above, according to the desktop circular saw 1 of the first aspect, the blade plate 7 is positioned at a position where the upper surface is equal to or higher than the upper surface of the turntable 3 by the elastic member (plate spring 12) provided in the escape groove 8. Due to the elastic support, the upper surface of the blade edge plate 7 can be exactly matched with the upper surface of the turntable 3 when the workpiece is positioned. Therefore, regardless of dimensional tolerances or the like, the flaking prevention effect of the material to be cut by the blade plate 7 can be effectively exhibited.
In particular, here, the blade plate 7 is a pair of left and right strips 10, 10 that form the slit 11 therebetween, and the elastic member is supported in an inclined posture that gradually increases as the strips 10 approach the slit 11. Since the leaf spring 12 is used, it is difficult to interfere with the blade edge plate 7 when positioning the material to be cut, and the belt plate 10 can be pressed against the material to be cut with an elastic force that becomes larger as it approaches the cut edge. Standing can be prevented more effectively.

In the first embodiment, the number of leaf springs may be increased or the length and width may be changed as appropriate. Further, the blade edge plate may be elastically supported not only by the plate spring but also by another elastic member such as a coil spring.
Furthermore, in the said form 1, although the strip | belt board is supported by the inclination attitude | position, a horizontal attitude | position may be sufficient. In this case, it can be supported by the elastic member so that the upper surface of the band plate coincides with the upper surface of the turntable.

[Form 2]
Next, another embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the same structure part as the form 1, and the overlapping description is abbreviate | omitted.
In the tabletop circular saw machine 1a shown in FIG. 3, a pair of left and right aluminum blocks 20 and 20 serving as a block body are accommodated on the bottom surface of the relief groove 8 of the turntable 3. The aluminum block 20 has a rectangular shape that is elongated in the front-rear direction along each band plate 10 and is moved in the left-right direction by ribs 21 and 21 erected on the bottom surface of the escape groove 8 as shown in FIG. In a restricted state, it can move only in the vertical direction. In addition, on the upper surface of each band plate 10, mounting recesses 22, 22 lower than the upper surface of the turntable 3 are formed in two front and rear portions, and a long hole 23 formed in each mounting recess 22 in the left-right direction is provided. By screwing the penetrated screw 24 into the aluminum block 20, the aluminum block 20 is integrally connected to the band plate 10. Further, adjustment screws 25 and 25 as screw members having hexagonal holes formed at the upper ends are screwed into the front and rear ends of each aluminum block 20. The adjusting screw 25 can be projected and retracted below the aluminum block 20 by rotating it with a hexagon wrench through a left and right elongated hole 26 formed in the band plate 10.

  On the other hand, a tension screw 27 is provided at the center of each aluminum block 20 in the front-rear direction. The tension screw 27 is formed by passing through a sleeve 28 fixed in a penetrating manner to the bottom of the escape groove 8 and screwing it into the aluminum block 20 from below. A coil spring 30 is interposed between the washer 29 and the washer 29. Therefore, the aluminum block 20 and the band plate 10 integrated therewith are tensioned downward by the tension screw 27 and the coil spring 30 as biasing means, but the adjustment screws 25 and 25 are moved to the aluminum block 20. When the aluminum block 20 is rotated downward in the screwing direction and protrudes downward from the aluminum block 20, the aluminum block 20 moves upward away from the bottom surface of the escape groove 8, and the lower limit position can be set. That is, a screw feed mechanism for moving the strip plate 10 up and down by feeding the aluminum block 20 by rotating the adjusting screw 25 is formed so that the upper surface of each strip plate 10 coincides with the upper surface of the turntable 3. It is something that can be done.

  In the desk circular saw machine 1a configured as described above, the material to be cut is set on the upper surface of the turntable 3 while being pressed against the front surface of the guide fence 4, and then the adjustment screw 25 is rotated. When the aluminum block 20 and the band plate 10 are screwed and the upper surface of each band plate 10 is brought into contact with the lower surface of the material to be cut, the upper surface of each band plate 10 coincides with the upper surface of the turntable 3. In this state, when the main body with the saw blade 9 rotated is lowered, the material to be cut can be cut with respect to the guide fence 4. At this time, since both the band plates 10 are in contact with the lower surface of the material to be cut in a state where the upper surfaces thereof exactly coincide with the upper surface of the turntable 3, the standing of the cut edges can be suppressed. Even if the upper surface of the band plate 10 deviates from the upper surface of the turntable 3 with use, it can be easily corrected by rotating the adjusting screw 25.

Thus, also in the desk circular saw machine 1a of the above-described form 2, the blade edge plate 7 is supported by the screw feed mechanism provided in the escape groove 8 so that the position in the vertical direction can be adjusted. When positioning, the upper surface of the blade edge plate 7 can be exactly matched with the upper surface of the turntable 3. Therefore, regardless of dimensional tolerances or the like, the flaking prevention effect of the material to be cut by the blade plate can be effectively exhibited.
In particular, here, the screw feed mechanism includes an aluminum block 20 connected to the lower side of the belt plate 10 and biasing means (the tension screw 27 and the coil spring 30) for biasing the aluminum block 20 and the belt plate 10 downward. And the adjustment screw 25 that can be adjusted to adjust the distance between the bottom surface of the escape groove 8 and the aluminum block 20 by being screwed into the aluminum block 20 and rotating downward to the bottom of the aluminum block 20. The vertical position can be easily adjusted.

  In the second embodiment, for example, if the width of the strip is wide, a plurality of adjustment screws are provided so that fine adjustment can be performed in the width direction of the strip, or a plurality of tension screws are provided for each strip, etc. The number and position of adjusting screws and tension screws may be changed as appropriate. The specific structure of the urging means can also use a simple tension spring without using a tension screw.

In addition, in common with Embodiments 1 and 2, the blade plate is not limited to a pair of strips, and even if a slit is formed at the center of one plate material, it depends on an elastic member or a screw feed mechanism. The top surface position can be adjusted.
In addition, the present invention can be applied to other cutting machines other than the above-described forms such as a slide maroon in which the main body slides back and forth via a slide bar, a type without a turntable, a type in which the main body does not tilt, and a cutter. is there.

It is a top view of the base part of the desktop circular saw machine of form 1. It is explanatory drawing of a blade edge | plate, A top shows a plane and the bottom shows a cross section, respectively. It is a top view of the base part of the desktop circular saw machine of form 2. It is explanatory drawing of a blade edge | plate, The top shows a plane, the bottom shows a cross section, and the left shows the cross section of a tension screw part.

Explanation of symbols

  1, 1a ··· Tabletop circular saw machine 2 · · Base 3 · · Turntable 4 · · Guide fence 7 · Blade plate 8 · Escape groove 9 · Saw blade 10 · · Belt Plate, 11 ... slit, 12 ... leaf spring, 15, 24 ... screw, 16 ... locking piece, 20 ... aluminum block, 25 ... adjusting screw, 27 ... tension screw, 30 ... coil spring.

Claims (4)

A main body having a rotary blade is provided above the base capable of setting a material to be cut so as to be movable up and down, while the rotary blade is inserted into an opening of a relief groove recessed in the center on the base side when the main body is lowered. A cutting machine provided with a blade plate having a slit capable of entering,
A cutting machine characterized in that the blade plate is elastically supported by an elastic member provided in the clearance groove at a position where the upper surface is equal to or higher than the upper surface on the base side.   The blade plate is a pair of left and right strips that form the slit, and the elastic member is a leaf spring that supports an inclined posture that gradually increases as the strips approach the slit. The cutting machine according to claim 1. A main body having a rotary blade is provided above the base capable of setting a material to be cut so as to be movable up and down, while the rotary blade is inserted into an opening of a relief groove recessed in the center on the base side when the main body is lowered. A cutting machine provided with a blade plate having a slit capable of entering,
The blade plate is supported by a screw feed mechanism provided in the relief groove so that the position in the vertical direction can be adjusted, and the screw feed mechanism includes a biasing unit that biases the blade plate downward. Cutting machine characterized by including. The screw feed mechanism is screwed into the block body and rotated by a block body coupled to the lower side of the blade edge plate, the urging means for urging the block body and the blade edge plate downward. The cutting machine according to claim 3, wherein a screw member is provided that can be adjusted to adjust a distance between a bottom surface of the escape groove and the block body by protruding and lowering the block body by an operation.

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