JPH0742644Y2 - Circular saw device with variable cutting angle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a circular saw having a variable cutting angle, which is called a miter saw or a compound miter saw.

[Prior Art] In a conventional cutting angle variable circular saw device, a rotary table is rotatably provided at a central portion of a base, a hinge is provided at a rear portion of the rotary table, and a bracket is vertically attached to the hinge. , A motor, speed reducer, circular saw, outer cover and safety cover are attached to the bracket, fences are attached to the left and right positions on the rear side of the base, and clamps are attached to the left and right positions to remove work materials such as wood. It can be held, and the circular saw is lowered until it enters a slit provided on the rotary table to cut the work material. In the compound miter saw, the rotary table can be rotated in order to change the miter angle and bevel angle of the circular saw, and the hinge rotates in a vertical plane along the left-right direction of the device with the pin axis as the center of rotation. You can move.

In the miter saw, the rotary table can be rotated and the hinge cannot be rotated in order to make the miter angle of the circular saw variable.

Therefore, in the compound miter saw, the circular saw can be tilted with two degrees of freedom, so that the work material can be cut in any slope, and in the miter saw, the circular saw can be Since the work piece can be inclined with one degree of freedom, the work material can be cut at an appropriate miter angle in the front-back direction of the device when viewed from a plane.

FIG. 6 is a left side view showing a vertical section of a base and a front portion of a rotary table of a conventional circular saw angle variable saw.

In order to rotate the turntable 1, the turntable 1
A handle 2 is provided on the front side surface of the. Then, in order to arbitrarily position and stop the rotary table 1, the grip 2
Has a male screw portion 3 on the base side thereof, and the male screw portion 3 is screwed into a screw hole 4 screwed on the front side surface portion of the rotary table 1, and further further than the male screw portion 3 of the handle 2. A rod portion 5 is provided on the side, the rod portion 5 is passed through a rod accommodating hole 6 provided inside the screw hole 4 of the rotary table 1, and when the handle 2 is turned in the screwing direction. The rod portion 5 abuts on a side surface 8 formed on the base 7 so as to be concentric with the rotation center of the rotary table 1.

In addition, the rod portion 5 may be brought into contact with the side surface 8 with a spacer (not shown) interposed therebetween.

As a cutting angle variable circular saw device corresponding to a miter saw, there is, for example, Japanese Utility Model Laid-Open No. 62-162001, but in the drawing, the same handle as the above is provided in order to arbitrarily position and stop the rotary table. I know that

[Problems to be solved by the invention] As described above, when the handle 2 is rotated in the screwing direction,
Since the rod portion 5 integrated with the handle 2 is brought into contact with the side face 8 formed on the base 7 while rotating, for example, the miter angles are positioned and fixed at positions of 0 degree, 15 degree, 45 degree, and 22.5 degree. If you do this for a long time, there will be large scratches on each positioning part on the side surface 8 of the bed 7, and as a result, the miter angles will be 0 degrees, 15 degrees, 45 degrees, and 22.5 degrees with very slight deviations. Even when it is desired to position and cut, the miter angle would be positioned at 0 degree, 15 degree, 45 degree, and 22.5 degree due to the flaw, and there was a problem that it could not be cut at the desired accurate angle. .

Further, when the rod portion 5 is brought into contact with the side surface 8 with the spacer interposed therebetween, it is possible to prevent the side surface 8 from being scratched. However, when the handle 2 is screwed so as to be strongly tightened, a twisting force is applied to the spacer. The miter angle may go wrong. For example, the spacer may be pinched in an inclined state, and in such a case, the spacer may be displaced by the cutting load and the miter angle setting of the rotary table may be displaced. There is a problem that the spacer cannot hit the side surface 8 when the rotary table is rotated.

The present invention has been devised in view of the above-mentioned points, and even if the handle is strongly tightened, it does not damage the side surface of the base.
Also, by turning the handle slightly to loosen the tightening, the pressure on the side surface of the base can be reliably released, and the rotating table can be rotated lightly without applying any pressing force to the side surface of the base. Compound miter saw or cutting angle as a miter saw An object is to provide a variable circular saw device.

[Means for Solving the Problems] According to the present invention, as means for solving the above problems, a rotary table 1 for rotatably supporting a circular saw 9 is provided on a base 7 in a rotatable manner. A male screw portion 3 provided on a handle 2 for rotating the rotary table 1 provided on the rotary table 1 is screwed into a screw hole 4 screwed on a side surface portion of the rotary table 1, and The rod portion 5 provided before the male screw portion 3 of the handle 2 is provided on the side surface 8 of the base 7.
When the handle 2 is turned in the screw-in direction, the side surface 8 of the base 7 and the handle 2 are interlocked with each other. By being fixed, the rotary table 1
In the circular saw device with variable cutting angle capable of arbitrarily positioning and fixing, the rod portion 5 has a short length, and an intermediate rod 10 slidably inserted into the rod accommodating hole 6 is provided at the tip of the rod portion 5, or Alternatively, the rod portion 5 is separated from the male screw portion 3 to form an intermediate rod 10, and the intermediate rod 10 is kept in a non-contact state with the side surface 8 of the base 7 when the handle 2 is not screwed. Provided is a circular saw device with variable cutting angle, characterized in that a flexible rod support pin 11 is penetrated through an intermediate portion of the rod support pin, and both ends of the rod support pin 11 are supported by a rotary table 1. It is a thing.

[Operation] When the handle 2 is turned in the screwing direction, the intermediate rod 10 is pushed. In this case, when the rod portion 5 is made short and the intermediate rod 10 slidably inserted into the rod accommodating hole 6 is provided at the tip of the rod portion 5, the rod portion 5 should press the intermediate rod 10. When the rod portion 5 is separated from the male screw portion 3 to form the intermediate rod 10, the male screw portion 3 presses the intermediate rod 10.

Then, the rod support pin 11 bends, and the intermediate rod 10 stops contacting the side surface 8 of the base 7. In this case, the intermediate rod 10 does not rotate and the rod housing hole 6
Since it slides inside and comes into contact with the side surface 8 of the base 7, it does not come into strong contact, and therefore the positioning accuracy does not deteriorate even after long-term use.

Further, when the handle 2 is turned in a direction of being loosened, the bending of the rod support pin 11 is restored and the intermediate rod 10 is moved to the side surface 8 of the base 7.
Therefore, the rotary table 1 can be lightly rotated by applying a lateral force to the handle 2.

[Embodiment] FIGS. 1 to 4 show a first embodiment in which the circular saw having a variable cutting angle according to the present invention is applied to a compound miter saw.

In this compound miter saw, a rotary table 1 is rotatably provided at a substantially central portion of a base 1 on which a work material w such as wood can be horizontally mounted, and a tightening lever 12 is provided from a rear portion of the rotary table 1. A bracket 14 is attached to a hinge 13 that is stopped at an arbitrary inclined position in the left-right direction by bolting with, and the bracket 14 has a power means including a motor 15 and a speed reducer 16, and the power means. Circular saw 9, rotated by
An outer cover 17 for concealing the upper part of the circular saw 9 and the circular saw 9
As it descends, it is pivoted upward from the front end of the outer cover 17 by the action of the link to enter the outer cover 17 to expose the lower part of the circular saw 9 and cut the circular saw 9. A safety cover 18 for ensuring the above is mounted so as to be located above the rotary table 1, and the circular saw 9 is lowered to a position 9 ′ with the circular saw 9 in an appropriate posture so that the circular saw 9 is laterally mounted on the base 1 on which the rotary table 1 is provided. It is configured to cut a work material w such as wood which is placed in a direction and fixed by a fence 19 and a clamp 20 provided on the base 1.

In particular, in this embodiment, as shown in FIGS. 3 and 4, a handle 2 for rotating the rotary table 1 is provided on the front side surface of the rotary table 1. The handle 2 is provided with a male screw portion 3, and the male screw portion 3 is screwed into a screw hole 4 screwed on the front side surface portion of the rotary table 1.

Then, in the rod housing hole 6 provided inside the screw hole 4 so as to open to the side surface 8 of the base 7, the rod portion 5 provided before the male screw portion 3 of the handle 2 and shorter than the conventional rod portion 5 is provided. Is slidably inserted, and the intermediate rod 10 is slidably inserted.

Further, a flexible rod support pin 11 is penetrated through an intermediate portion of the intermediate rod 10 so that the intermediate rod 10 is not in contact with the side surface 8 of the base 7 when the handle 2 is not screwed in, and Both ends of the rod support pin 11 are supported by the turntable 1.

FIG. 4 is a view showing a mounting structure of the rod support pin 11.

In order to support both ends of the rod support pin 11 on the rotary table 1 so that the rod support pin 11 is bent by the thrust applied to the intermediate rod 11, a recess 21 of a required shape cut out from the outside is provided in the middle of the rod accommodating hole 6. ing. The recess 21 is provided at both ends 11a, 11 of the rod support pin 11 apart from the intermediate rod 10.
Stepped groove portions 21a, 21b for seating b are formed, and therefore,
The intermediate rod 10 is non-rotatably supported by the rod support pin 11, and further, arcuate groove portions 21c and 21d having a required width wider than the stepped groove portions 21a and 21b are formed, and accordingly, thrust in the pushing direction acts on the intermediate rod 10. Then, the rod support pin 11 can be bent, and further, the arcuate groove portions 21c, 2c.
1d is formed in a shallow arc shape in which the depth of the end 211 on the side of the stepped groove portions 21a, 21b matches the depth of the stepped groove portions 21a, 21b, and the other end 212 hits the rod accommodating hole 6, thus forming an intermediate rod. A hole through which the rod support pin 11 is formed is slightly inclined, the rod support pin 11 is passed through the hole, and the end of the rod support pin 11 on the through side is raised to the arc-shaped groove portion 21d to form a stepped groove portion. The rod support pin 11 is seated on the stepped groove portion 21a, and the rod support pin 11 is not detachable.

Therefore, the intermediate rod 10 is supported in a skewered shape by the flexible rod support pin 11, and the rod support pin 11 is bent by the thrust acting on the intermediate rod 10 to bend.
Is supported at both ends on the rotary table 1 so as to slide a required stroke in the direction of the side surface 8 of the rotary table 1, and when the thrust does not act, the intermediate rod 10 approaches the side surface 8 in a non-contact state. .

When the handle 2 is turned in the screwing direction, the intermediate rod 10 is pushed by the rod portion 5 provided on the handle 2, and the rod support pin 11 is bent to form the intermediate rod 10 on the base 7. The abutting side surface 8 is stopped, and when the handle 2 is rotated in the direction of loosening,
Since the bending of the rod support pin 11 is returned and the intermediate rod 10 is separated from the side surface 8 of the base 7, the rotary table 1 can be lightly rotated by applying a lateral force to the handle 2.

Therefore, when the handle 2 is rotated in the screwing direction, the rod portion 5 pushes the intermediate rod 10, and the intermediate rod 10 slides and abuts on the side surface 8 of the base 7 without rotating, and the rotary table 1 moves. Since the rotary table 1 is fixed to the base 7, the rotary table 1 can be arbitrarily positioned and fixed.

FIG. 5 is a sectional view of the essential parts of a second embodiment of a circular saw device with variable cutting angle according to the present invention.

In this embodiment, the handle 2 is not provided with the rod portion 5 shown in FIG. The intermediate rod 10 inserted into the rod accommodating hole 6 is longer than the intermediate rod 10 shown in FIG. The intermediate rod 10 is formed by separating the rod portion 5 shown in FIG. 6 from the male screw portion 3.

Then, as in FIG. 3, the intermediate rod 10 has the handle 2
The flexible rod support pin 11 is pierced through the intermediate portion of the intermediate rod 10 so that the rod support pin 11 is not in contact with the side surface 8 of the base 7 when it is not screwed in, and both ends of the rod support pin 11 rotate. Supported by Table 1.

Therefore, when the handle 2 is rotated in the screwing direction, the male screw portion 3 pushes the intermediate rod 10, the intermediate rod 10 abuts the side surface 8 of the base 7 without rotating, and the rotary table 1 is attached to the base 7. Since it is fixed, the rotary table 1 can be arbitrarily positioned and fixed.

[Effect] As described above, according to the cutting angle variable circular saw device according to the present invention, even if the grip is tightly tightened, the intermediate rod contacts the side surface of the base without rotating, and thus the circumferential outer wall surface If the handle is turned slightly and the tightening is loosened, the intermediate rod is separated from the outer peripheral wall surface by the rod support pin, so that the rotary table can be securely released from the outer peripheral surface of the base. The rotary table can be rotated lightly without applying a little pressing force to the wall surface.

[Brief description of drawings]

FIG. 1 is a left side view according to an embodiment in which a variable cutting angle circular saw device of the present invention is applied to a compound miter saw.
2 is a front view of the same, FIG. 3 is an enlarged vertical sectional view of an essential part of a cutting angle variable circular saw device, and FIG. 4 is a IV-IV sectional view in FIG. FIG. 5 is an enlarged longitudinal sectional view of the essential parts of a second embodiment of the circular saw device with variable cutting angle according to the present invention. FIG. 6 is a left side view showing a vertical section of a base and a front portion of a rotary table of a conventional circular saw angle variable saw. 1 ... Rotary table, 2 ... Handle, 3 ... Male thread, 4
...... Screw hole, 5 ...... Rod part, 6 ...... Rod accommodating hole, 7
…… Base, 8 …… Side of base, 9 …… Circular saw, 10 ……
Intermediate rod, 11 …… Rod support pin,

Claims (1)

[Scope of utility model registration request] 1. A rotary table for rotatably supporting a circular saw is rotatably provided on a base, and a male screw portion provided for a handle for rotating the rotary table is provided on the rotary table. A rod portion, which is screwed into a screw hole provided on a side surface portion of the rotary table and is provided ahead of the male screw portion of the handle, is provided inward of the screw hole so as to open to a side surface of the base. Through the rod receiving hole,
When the handle is turned in the screwing direction, the side surface of the base and the handle are fixed to each other, so that the rotary table can be arbitrarily positioned and fixed. An intermediate rod slidably inserted into the rod accommodating hole at the end of the rod portion, or the rod portion is separated from the male screw portion to form an intermediate rod, A flexible rod support pin is pierced through the intermediate portion of the intermediate rod and both ends of the rod support pin are rotated so that the intermediate rod is not in contact with the side surface of the base when the handle is not screwed. A circular saw device with variable cutting angle, which is supported by a table.