JPH1148030A - Bench cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the unnecessary movement of a circular saw main body at the time of carrying so as to safely and easily carry the saw in the stabilized condition by providing a lock means for fixing a circular saw main body for carrying. SOLUTION: At the time of carrying a bench cutter, a front link 11 and a rear link 12 are placed so as to come closest to each other, and a position of a tip of a lock pin 20 of a lock means 15 coincides with a position of a lock hole 12b formed in the rear link 12. In this condition, the lock pin 20 is pushed so that the tip thereof is inserted into the lock hole 12b. The front link 11 and the rear link 12 are thereby locked with each other, and as a result, a circular saw main body is stably held. Unnecessary movement of the circular saw at the time of carrying is thereby prevented, and carrying is safely and easily performed in the stabilized condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a table cutting machine in which a circular saw main body can move in the front-back direction.

[0002]

2. Description of the Related Art Conventionally, a desktop cutting machine has a base and a circular saw main body, and the circular saw main body is placed between an upper position (that is, a cutting standby position) and a lower position (that is, a cutting completion position). Was configured to be swingable along the plane of the saw blade. In such a tabletop cutting machine, the length in which the material to be cut can be cut by one cutting step, that is, one swing of the circular saw main body, is determined by the diameter of the saw blade. It was not possible to cut a workpiece having a width greater than the diameter in one cutting step.

In view of the above-mentioned circumstances, in recent years, there has been a demand for the development of a tabletop cutting machine capable of cutting a workpiece having a width larger than the diameter of a saw blade in a single cutting step. In response to the demand, there has been proposed a tabletop cutter having a base and a circular saw body attached to the base via a link mechanism so as to be movable between a front position and a rear position.

[0004]

However, in the above-mentioned conventional table cutting machine, the circular saw body can be moved in the front-rear direction via the link mechanism. The main body moved unnecessarily, and had to be transported in an unstable state, making transport work difficult.

[0005] Further, in such a tabletop cutting machine in which the circular saw main body can be moved in the front-rear direction via the link mechanism,
Since there is no means for regulating the forward and backward movement limit positions of the circular saw body, the forward limit position and the rear limit position of the circular saw body cannot be secured, and the circular saw body is not provided. Is placed in an unstable state, and there is a possibility that the cutting operation efficiency is reduced due to this.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a tabletop cutting machine capable of avoiding unnecessary movement of the circular saw body during transportation, and performing transportation in a stable and safe and easy manner. It is in.

Still another object of the present invention is to provide a desktop cutting machine capable of maintaining the circular saw main body in a stable state at the start and end of cutting in the cutting step and improving the cutting work efficiency. It is in.

[0008]

According to a first aspect of the present invention, there is provided a circular saw body mounted on a base (1) and movably in a front-rear direction via a link mechanism (L). And 3) locking means (15, 2) for holding the circular saw body (3) immovably.
5, 26, 27 or 28) is provided.

According to a second aspect of the present invention, in the desktop cutting machine according to the first aspect, the link mechanism (L) includes a pair of links (1).
1, 12), and the locking means (15)
Is characterized in that the pair of links (11, 12) can be fixed to each other.

According to a third aspect of the present invention, in the desk cutting machine according to the first aspect, the link mechanism (L) includes a pair of links (1).
1, 12), and the pair of links (11, 12)
The cover (1) is arranged close to each other and closes a gap between the pair of links (11, 12).
1a) is provided on one of the pair of links (11, 12).

According to a fourth aspect of the present invention, there is provided a base (1), and a circular saw body (3) attached to the base (1) so as to be movable in the front-rear direction via a link mechanism (L). In a tabletop cutting machine, a front limit position regulating means (1) for regulating a forward limit position of the circular saw body (3).
6) and a rear limit position restricting means (19) for restricting a rear limit position of movement of the circular saw body (3) to the rear.

Hereinafter, the present invention will be described with reference to the drawings showing embodiments of the present invention. However, the present invention is not limited to the illustrated embodiment.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

[0014] The tabletop cutting machine according to the embodiment of the present invention comprises:
It has a basic configuration including a base 1, a circular saw main body 3, and a link mechanism L for attaching the circular saw main body 3 to the base 1 movably in the front-rear direction.

As shown in FIG. 2, the base 1 has four legs 1a, and has a circular turntable mounting portion at the center thereof. A fence 13 is fixed to the base 1, and the material to be cut 14 such as wood is brought into contact with the fence 13 to position the fence 13. The base 1 includes a turntable 2 mounted on the turntable mounting portion.

As shown in FIGS. 1 and 2, the turntable 2 is mounted on the turntable mounting portion of the base 1 and is rotatably mounted on the base 1 via a vertically extending support shaft 5. And a rectangular portion 2b integrally formed at one end of the circular portion 2a. On the upper surface of the turntable 2 thus configured, a pair of blade plates (not shown) are attached in parallel along the length direction of the rectangular portion 2b at intervals with a gap therebetween. When cutting the material 14, the tip of the saw blade 9 can be inserted between the pair of blade plates.

A bracket 8 is rotatably mounted on a circular portion 2a of the turntable 2 at a position opposite to a side where the rectangular portion 2b is formed, via a support shaft 7 extending in the horizontal direction. (See FIGS. 1 and 2).

An angle scale (not shown) for indicating the angle of the turntable 2 with respect to the base 1 is provided on a part of the base 1 around the turntable mounting portion.
Is provided.

The circular saw main body 3 is mounted on a frame 17 and has a main body 10a in which a motor (not shown) for rotating the saw blade 9 is built.
And a movable portion 10b that is rotatably mounted via a pin 0c and rotatably supports the saw blade 9. The movable part 10b is provided with a first handle 3a and a second handle 3b. Of course, the saw blade 9 is
a is connected via a power transmission mechanism (not shown) to an output shaft of a motor built in the a.

The link mechanism L includes a pair of links, that is, a front link 11 and a rear link 12. As is clear from FIG. 3, the front link 11 and the rear link 12 each have a substantially H shape. The front link 11 has a pair of upper mounting holes 11e in its upper part,
11e, and a pair of lower mounting holes 11f, 11f in the lower portion thereof. or,
The rear link 12 has a pair of upper mounting holes 12e, 12e in its upper portion, and has a pair of lower mounting holes 12f, 12f in its lower portion.

The front link 11 configured as described above is
The pair of covers 11a, 11a are arranged so as to face rearward, and are rotatably supported by the bracket 8 in lower mounting holes 11f, 11f, respectively, and fix the circular saw body 3 in the upper mounting holes 11e, 11e. Are rotatably supported by the respective frames 17.
The rear link 12 is disposed so as to be housed between the pair of covers 11a, 11a of the front link 11, is rotatably supported by the bracket 8 in lower mounting holes 12f, 12f, and has an upper mounting hole 12e. , 1
2e, the frame 17 is rotatably supported by the frame 17, respectively. Therefore, the circular saw main body 3 includes the front link 11
The rear link 12 can move in the front-rear direction within the range of a predetermined stroke permitted by these.

By employing the combination of the base 1 having the above-described turntable 2 and the link mechanism L,
The circular saw body 3 is rotatable along a horizontal plane around a spindle 5 (see FIGS. 1 and 2) together with the turntable 2, while being independent of the turntable 2 and around a spindle 7. The circular saw main body 3 is rotatable along a vertical plane, and the circular saw body 3 is allowed by the link mechanism L along the same plane as the saw blade 9 at any position within such a rotation range. It is movable in the front-back direction within the range of a predetermined stroke. That is, the circular saw main body 3 can move along the plane of the saw blade 9 between the cutting standby position and the cutting completion position, and can tilt along a plane orthogonal to the plane of the saw blade 9.

Accordingly, when the circular saw main body 3 is located at the rear, the front link 11 and the rear link 12 are placed in the closest state to each other, and from this state, the circular saw main body 3 is moved forward. As it moves, the distance between the front link 11 and the rear link 12 increases slightly but gradually.

As described above, the front link 11 and the rear link 12 are arranged close to each other, but the rear side of the front link 11 closes the gap between the links 11 and 12. Cover 11 projecting rearward as shown
a and 11a are integrally formed. The pair of covers 11a, 11a prevents foreign matter from being caught between the front link 11 and the rear link 12.

As is apparent from the above description, the saw blade 9 is maintained vertically, and the saw blade 9 maintained in this manner is placed so as to be orthogonal to the contact surface of the workpiece 14 with the fence 13. If the saw blade 9 is moved in the plane direction while holding the mounting position of the cutting material 14, the workpiece 14 can be cut at a right angle, and the saw blade 9 is maintained vertically. The saw blade 9 is moved in the plane direction while maintaining the mounting position of the workpiece 14 so that the saw blade 9 maintained vertically is not orthogonal to the contact surface of the workpiece 14 with the fence 13. Accordingly, the workpiece 14 can be cut obliquely in its plane, and the saw blade 9 is maintained in a state inclined with respect to the vertical line. So as to be perpendicular to the contact surface of the workpiece 14 to the fence 13 If the saw blade 9 is moved in the plane direction while the mounting position of the workpiece 14 is held, the workpiece 14 can be cut obliquely in that plane. By arbitrarily combining the above-described arrangements of the members 14, it is possible to perform cutting in accordance with a cutting pattern according to each combination.

The table cutter according to the present invention further includes a miter lock mechanism 4, a bevel lock mechanism 6, and a tilt stop mechanism 22.
It has.

The miter lock mechanism 4 fixes and releases the turntable 2 to and from the base 1. A miter lock operation handle 4a for performing this operation is provided with a miter lock operation handle 4a.
As shown in FIGS. 1 and 2, it is arranged on the front side of the turntable 2.

The bevel lock mechanism 8 fixes and releases the tilt of the circular saw main body 3, and a bevel lock operation handle 6a for performing this operation is provided on the turntable 2 as shown in FIGS. It is arranged on the front side.

The tilt stop mechanism 22 is used to stop the tilt of the circular saw body 3 when the saw blade 9 is positioned vertically when the circular saw body 3 tilts from one side to the other. The tilt stop operation handle 22a for performing
As shown in FIG.

The desktop cutting machine of the present invention further comprises a circular saw body 3
Is provided with a lock means 15 for holding the camera stationary.
This locking means 15 enables a pair of links constituting the above-mentioned link mechanism L, that is, a front link 11 and a rear link 12 to be fixed to each other. As shown in FIG. A lock pin 20 slidably fitted in a through hole 11b formed in a side portion of
A lock hole 12b is formed in the rear link 12 so that the tip of the lock pin 20 can be received. That is, a part of the rear link 12 is projected into the space 11c of the front link 11 to form a rib 12a, and a lock hole 12b for receiving the tip of the lock pin 20 is formed in the rib 12a. ing.

The tabletop cutting machine of the present invention further comprises a front limit position restricting means 16 and a rear limit position restricting means 19.

The forward limit position restricting means 16 includes the circular saw main body 3.
3 and 7, the upper mounting hole 1 of the rear link 12 in the frame 17 to which the circular saw main body 3 is fixed.
Adjusting screw 18 screwed into a screw hole 17b formed substantially perpendicularly to the overhang portion 17a projecting rearward beyond 2e.
And a contact portion 12g formed on the rear link 12 so that the tip of the adjusting screw 18 can contact when the circular saw main body 3 reaches the limit position of forward movement. .

That is, the circular saw body 3 can move from the rear position shown in FIG. 2 to the front position shown in FIG.
When the circular saw main body 3 reaches the limit position of the forward movement, the tip of the adjusting screw 18 in the front limit position restricting means 16 abuts on the contact portion 12g of the rear link 12, and as a result, the circular saw main body 3 Is restrained from moving further forward.
The limit position of the forward movement of the circular saw main body 3 can be finely adjusted by adjusting the screwing amount of the adjusting screw 18 described above. Of course, the front limit position restricting means 16
Restricts the limit position of the forward movement of the circular saw body 3 and does not affect the backward movement of the circular saw body 3 at all.

On the other hand, the rear limit position regulating means 19 regulates the limit position of the backward movement of the circular saw main body 3, and as is apparent from FIGS. 4 and 8, the rear link 12 is moved in the thickness direction. When the adjusting screw 21 screwed into the screw hole 12d penetrating the circular saw body 3 reaches the limit position of the backward movement, that is, the front link 11 and the rear link 12 are in the closest state. When set, the adjustment screw 21
And a contact part 29 provided on the front link 1 so that the tip of the front link can contact.

The contact portion 29 is a block made of an elastic material having a shock-absorbing function, for example, rubber, resin, or the like, and is formed in the front link 11 at a position facing the tip of the adjusting screw 21. 11d.

That is, the circular saw main body 3 is movable from the front position shown in FIG. 1 to the rear position shown in FIG.
When the circular saw main body 3 reaches the limit position for backward movement, the tip of the adjusting screw 21 in the rear limit position restricting means 19 comes into contact with the contact portion 29 of the front link 11, and as a result, the circular saw main body 3 Is restrained from moving further backward.
The limit position of the backward movement of the circular saw main body 3 can be finely adjusted by adjusting the screwing amount of the adjusting screw 21 described above. Of course, the rear limit position regulating means 19
Restricts the limit position of the backward movement of the circular saw body 3 and does not affect the forward movement of the circular saw body 3 at all.

Next, a method of operating the above-described desk cutting machine of the present invention will be described below.

With the rotation angle of the turntable 2 maintained at 0 ° and the inclination angle of the saw blade 9 maintained at 0 °,
A first cutting pattern for cutting the workpiece 14 made of rectangular parallelepiped wood will be described. First, one surface (hereinafter, referred to as “outer side surface”) of the material to be cut 14 is brought into contact with the fence 13, and in this state, the material to be cut 31 is placed on the base 1 via a fixing bracket (not shown). Fix it.

Next, with the inclination angle of the saw blade 9 kept at 0 ° by the bevel lock mechanism 6, the bevel lock operation handle 6a is tightened, and the circular saw body 3 is moved via the link mechanism L and the bracket 8. Lock to turntable 2.

Next, the miter lock operation handle 4a
To release the fixation of the turntable 2 to the base 1 and, in this state, move the pointer (not shown) of the turntable 2 to 0 ° on the angle scale (not shown) of the base 1.
The turntable 2 is rotated so that In this state, the turntable 2 is locked to the base 1 by tightening the miter lock operation handle 4a.

Next, with the circular saw main body 3 held at the uppermost position, that is, the cutting standby position, the circular saw main body 3 is moved to the front side of the turntable 2, and in this state, the motor (not shown) is turned on. When driven, the saw blade 9 is rotated, and the circular saw body 3 is pressed downward. By the pressing operation of the circular saw main body 3, a cut is made in the front side portion of the workpiece 31 (see FIG. 1). Thus, when the circular saw body 3 is pressed downward and reaches the lowermost position, the lower end portion of the saw blade 9 is inserted between a pair of blade edge plates (not shown) mounted on the turntable 2. You.

In the state described above, the circular saw main body 3 is moved to the rear side of the turntable 2 while being pressed downward (see FIG. 2). As a result, the material to be cut 14 is cut straight in the vertical direction with respect to the outer side surface, in other words, the material to be cut 14 has an upper side (hereinafter, referred to as a “reference line”) on the outer side surface in the plane. Is cut so as to have a cut surface defined by a cutting line perpendicular to the reference line and a cutting line perpendicular to the reference line on the outer side surface.

In the cutting pattern described above, when the circular saw main body 3 reaches the limit position for forward movement, the tip of the adjusting screw 18 in the front limit position regulating means 16 contacts the contact portion 12g of the rear link 12. As a result, further forward movement of the circular saw main body 3 is restrained. On the other hand, when the circular saw main body 3 reaches the limit position of the backward movement, the tip of the adjusting screw 21 in the rear limit position restricting means 19 abuts on the contact portion 29 of the front link 11, and as a result, the circular saw main body 3
Is restrained from moving further backward.

When transporting the table cutter of the present invention, the circular saw main body 3 is moved backward to the above-described limit position, and the tip of the adjusting screw 21 in the rear limit position regulating means 19 is moved forward. It is brought into contact with the contact portion 29 of the link 11. At this time, the front link 11 and the rear link 12 are placed closest to each other, and the position of the tip of the lock pin 20 in the lock means 15 matches the position of the lock hole 12b formed in the rear link 12. In such a state, the lock pin 20 is pushed in, and the tip thereof is inserted into the lock hole 12.
Insert into b. When the tip of the lock pin 20 is inserted into the lock hole 12b in this manner, the front link 11 and the rear link 12 are locked with each other, and as a result, the circular saw main body 3 is held in an immobile state. Therefore, unnecessary movement of the circular saw body during transportation is avoided, and transportation can be performed safely and easily in a stable state.

In the table cutting machine according to the above-described embodiment of the present invention, the locking means 15 can fix the pair of links constituting the link mechanism L, that is, the front link 11 and the rear link 12 to each other. As described above, the lock pin 20 slidably fitted in the through hole 11b formed on the side of the front link 11, and the lock pin 20
Rear link 1 so that it can accept the tip of
Although the lock means 15 has been described as having the lock hole 12b formed in FIG. 2, the form and the position of the lock means 15 are arbitrary as long as the lock means 15 holds the circular saw body 3 immovably. For example, as shown in FIG.
5, 26, 27, and 28. When the circular saw main body 3 is moved rearward and swung downward, a point P on the projecting piece 23 provided on the bracket 8 is formed.
1 and a protruding piece 24 provided on an upper portion of the rear link 12.
And the point P2 in the frame 17 may be connected to the point P2 under a predetermined tension by the connecting tool 25.
3 under a predetermined tension by a connecting portion 26,
A point P4 on the circular saw body 3 and a point P5 on the upper portion of the bracket 8 are connected under a predetermined tension by a connecting tool 27, or the point P4 and the point P5 on the rear part of the turntable 2 are connected by a connecting tool 28. By connecting the circular saw body 3 under a predetermined tension, the circular saw main body 3 can be configured to be immovably held.

In the desktop cutting machine according to the above-described embodiment of the present invention, the link mechanism L includes a pair of links 11, 1
Although the link mechanism L has been described as being composed of two links, the link mechanism L may be of any form as long as it can support the circular saw body 3 movably in the front-rear direction. The link mechanism L may be constituted by a slide means such as a cylinder connected so as to be linked with the link mechanism L.

In the table-top cutting machine according to the above-described embodiment of the present invention, the front side of the front link 11 is extended rearward so as to close the gap between the front and rear links 11 and 12. Although it has been described that the pair of covers 11a and 11a are formed integrally,
The pair of covers 11a, 11a
Instead of being formed integrally with the front link 11, it may be formed separately and attached to the front link 11 by fixing means such as screws. Also, a pair of these covers 11a,
11 a can be provided not on the front link 11 but on the rear link 12.

[0048]

According to the present invention described in detail above, claim 1
As described in the above, in a tabletop cutting machine having a base and a circular saw main body attached to the base so as to be movable in the front-rear direction via a link mechanism, a lock for holding the circular saw main body immovably. Since means is provided, unnecessary movement of the circular saw body during transportation is avoided, and transportation is
It can be performed safely and easily in a stable state.

Further, if the link mechanism is constituted by a pair of links and the locking means is constituted so that the pair of links can be fixed to each other, the link mechanism can be configured as follows. Without complicating the structure,
It can significantly improve the mounting strength of the circular saw body, and perform stable cutting work without displacing the circular saw body in an inappropriate state even if a large external force is applied to the circular saw body during cutting work. And the structure of the locking means itself can be simplified.

Also, as described in claim 3, claim 1
In the tabletop cutting machine, the link mechanism is constituted by a pair of links, the pair of links are arranged close to each other, and a cover for closing a gap between the pair of links is provided by one of the pair of links. In addition to this, not only the effect according to claim 2 described above, but also foreign matter can be prevented from being caught between the pair of links.

Further, as set forth in claim 4, in a tabletop cutting machine having a base and a circular saw main body attached to the base so as to be movable in the front-rear direction via a link mechanism, the circular saw main body is provided. Since the front limit position restricting means for restricting the forward limit position of the circular saw and the rear limit position restricting means for restricting the backward limit position of the circular saw body are provided, respectively, Cutting operation efficiency can be improved at the start and end of cutting in the process.

[Brief description of the drawings]

FIG. 1 is a front view of a desk cutting machine according to an embodiment of the present invention immediately after starting cutting.

FIG. 2 is a front view of the tabletop cutting machine according to the embodiment of the present invention immediately before cutting is completed.

FIG. 3 is a right side view of the link mechanism in the state shown in FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is a sectional view taken along line VV of FIG. 3;

FIG. 6 is a sectional view taken along line VI-VI of FIG. 3;

FIG. 7 is an enlarged view showing a front limit position restricting means in the bench cutter according to the embodiment of the present invention.

FIG. 8 is an enlarged view showing a rear limit position regulating means in the tabletop cutting machine according to the embodiment of the present invention.

FIG. 9 is a rear view of the table cutting machine showing a modification of the locking means in the table cutting machine of the present invention.

[Explanation of symbols]

 1: Base 3: Circular saw body L: Link mechanism 11: Front link 12: Rear link 15: Locking means 16: Front limit position restricting means 19: Rear limit position restricting means

Claims (4)

[Claims] 1. A desktop cutting machine comprising a base and a circular saw main body attached to the base so as to be movable in the front-rear direction via a link mechanism, wherein a locking means for holding the circular saw main body immovably. A tabletop cutting machine, characterized in that a table cutting machine is provided. 2. The apparatus according to claim 1, wherein the link mechanism comprises a pair of links, and the locking means is configured to fix the pair of links to each other. Tabletop cutting machine. 3. The link mechanism comprises a pair of links, wherein the pair of links are disposed close to each other, and a cover for closing a gap between the pair of links is provided by the pair of links. The tabletop cutting machine according to claim 1, wherein the tabletop cutting machine is provided in any one of: 4. A desktop cutting machine comprising a base and a circular saw main body attached to the base so as to be movable in the front-rear direction via a link mechanism, wherein a limit position of the forward movement of the circular saw main body is determined. A desktop cutting machine, comprising a front limit position restricting means for restricting and a rear limit position restricting means for restricting a limit position of backward movement of the circular saw body.