JPH037128Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to an improvement of a mortise machine such as a satsushi.

(Conventional technology and its problems) Machines for tenoning workpieces such as single sashes and composite sashes use a single circular saw blade that moves up and down to cut into the workpiece that is fixed to a workbench. Next, the workpiece is removed from the workbench, rotated 90 degrees and fixed again, and the circular saw blade is moved up and down to cut the end of the workpiece at right angles. There was also a double-type tenon machine, which was arranged vertically at right angles, and had two circular saw blades that moved up and down at the same time to mortise the workpiece.

In the case of the former, the disadvantage is that long workpieces must be moved, which is extremely difficult in a narrow workplace, and it is difficult to set the workpieces accurately on the workbench. The disadvantages were that the work was quite complicated to carry out, and the efficiency was very low in mass production.

In the latter case, it is possible to perform tenon processing in one step, but two drive devices are required to drive two circular saw blades, which makes the device expensive and requires a large scale. etc. were hot.

(Purpose of the invention) The present invention was devised in view of the drawbacks of the conventional examples, and its purpose is to be simpler than the conventional metal tenon machine, and to set the workpiece in one place. The objective is to provide a highly practical mortise machine that requires only a degree.

(Means for solving the problem) In order to achieve the above-mentioned purpose, the present invention is designed to allow a circular saw blade 3 to be moved up and down and horizontally rotated with respect to a workbench 2 for fixing a workpiece 1 such as a saw. Place it so that it can move freely.

A vertical axis passing through the intersection of a horizontal line H passing through the rotation center O of the circular saw blade 3 and the tip of the circular saw blade 3 on the workpiece 1 side is defined as a horizontal rotation center axis V of the circular saw blade 3.

; is adopted as a technical means.

(effect) A workpiece 1 is accurately fixed on a workbench 2.

The circular saw blade 3 is lowered while rotating at high speed.

When the circular saw blade 3 passes through the workpiece 1, a cut is formed in the workpiece 1 at a predetermined depth.

When the circular saw blade 3 is returned to the top dead center, the circular saw blade 3 is rotated by a predetermined angle about the horizontal rotation center axis V and fixed.

Thereafter, the circular saw blade 3 is raised and lowered in the same manner as described above to cut into the workpiece 1 and cut off the end of the workpiece 1 at a predetermined angle.

At this time, since the horizontal rotation center axis V of the circular saw blade 3 coincides with the tip of the circular saw blade 3, the tips of the cuts are accurately aligned, and neither excessive cutting nor insufficient cutting occurs.

(Example) Hereinafter, the present invention will be described in detail according to the illustrated example.
The workpiece 1 is a sash as shown in FIG. 3, and there are various types such as a single piece or a composite type. The workbench 2 has a frame structure, and a rotation shaft 4 is provided at the center of the bottom surface, and a plurality of roller bearings 5 are set concentrically around the bottom surface to support a rotation table 12, which will be described later. ing. The worktable 6 has a guide plate 7 for guiding the workpiece 1, and the workpiece 1 is fixed on the workbench 2 by a workpiece fixing mechanism 8 installed upright from the workbench 2, and the workpiece 1 is fixed to a predetermined position. A cut can be made into the workpiece 1 at a depth of . In the illustrated embodiment, the workpiece fixing mechanism 8 has a lock bar 9 attached to a lock block 10 so as to be able to move up and down, and is raised and lowered by a lock lever 11. When the lock bar 9 is lowered, the workpiece 1 is fixed. It is designed to be pressed and fixed to the workbench 2. The rotating table 12 is gate-shaped and is erected on an L-shaped rotating plate 13, and two guide bars 14 are erected in parallel. This guide bar 1
A sliding plate 15 is attached to 4 so as to be able to rise and fall freely, and a balancer (not shown) is attached to the suspension chain 16.
They are connected to and suspended in a distributed manner. A bearing 17 is installed horizontally on the front surface of this sliding plate 15.
A circular saw blade 3 is rotatably supported at high speed, and as shown in FIG. 2, first and second drive chains 18,
At 19, the rotation of the motor 20 is transmitted. The tension of the second drive chain 19 is special so that the rotation of the motor 20 fixed to the back surface of the rotary table 12 is transmitted to the circular saw blade 3 which can be raised and lowered. That is, the intermediate sprocket 21 provided at the bottom of the rotating table 12 and the motor 20
The drive sprocket 22 of the first drive chain 1
8 is connected. The second drive chain 19 is a driven sprocket 2 provided on the upper part of the rotating table 12.
3 and an intermediate sprocket 21, and the back side of the rotating base 12 is connected straight, but the front side is connected to a fixed tension sprocket 24 at the bottom of the rotating base 12, and a pair of upper and lower sprockets. It is disposed between the lifting tension sprockets 25 and 26 and between the lifting tension sprockets 25 and 26, and is suspended from a saw blade sprocket 27 and the like. Lifting tension sprocket 25 and saw blade sprocket 2
7 is attached to the sliding plate 15, and the second drive chain 19 is arranged in the front and rear so as to effectively mesh with the saw blade sprocket 27. Here, the elevating tension sprocket 25 and the fixed tension sprocket 24 on the lower side of the second drive chain 19
The part suspended between the saw blade sprocket 27 and the saw blade sprocket 27 is arranged vertically so that the meshing state does not change even if the saw blade sprocket 27 moves up and down. As a result, the motor 20 and the circular saw blade 3 can be separated. There is a handle 28 on the side surface of the rotating table 12 that engages with the suspension chain 16, and by rotating the handle 28, the circular saw blade 3 is raised and lowered. Of course, a control motor (not shown) can be used instead of the handle 28.
It is also good for automatic control.
Further, a lock mechanism 29 is provided on the lower side surface of the rotating table 12. That is, the stopper rod 31 is inserted into the gate-shaped guide block 30 arranged above and below so as to be able to rise and fall freely, and the stopper rod 31 is raised and lowered by a lever 32 using a link mechanism, and when the stopper rod 31 is lowered, The rotating table 12 is fixed by being inserted into a stopper hole 33 bored in the bottom of the work table 2. The stopper holes 33 are not limited to two locations at 0° and 90°, and can be formed as needed. Furthermore, the locking mechanism 29 is not limited to the illustrated embodiment, and may be of any mechanism as long as it can lock the rotating table 12 at a predetermined position. Then, the workpiece 1 such as a sash material is placed on the workbench 2 with the guide plate 7 attached, the lock bar 9 is lowered to fix it in a predetermined position, and the circular saw blade 3 is lowered to remove the workpiece. Make a cut groove at the specified depth in 1. After cutting the groove, raise the circular saw blade 3, then raise the stopper rod 31 and remove it from the stopper hole 33.
After freeing the rotating table 12, the circular saw blade 3 and the motor 2
Rotate the rotating table 12 equipped with 0 by 90 degrees around the rotating shaft 4. The rotating table 12 is supported by roller bearings 5 and rotates about the rotating shaft 4. When rotated 90 degrees, stopper rod 31
is lowered and inserted into the other stopper hole 33 to fix the rotating table 12. After that, the circular saw blade 3 is lowered again to make a cut groove in the workpiece 1 and cut out unnecessary portions at an angle of 90°. Here, since the rotating shaft 4 and the tip of the circular saw blade 3 are aligned, the bottoms of the kerfs are aligned, and the unnecessary portion is cut off as described above.

In addition, by changing the position of the stopper hole 33,
It goes without saying that the rotating table 12 can be fixed at an angle other than 90°.

(Effects) As mentioned above, the present invention has a circular saw blade arranged so that it can be raised and lowered and rotated horizontally on a workbench for fixing a workpiece such as a saw blade. The vertical axis passing through the intersection of the horizontal line passing through the center and the tip of the circular saw blade on the workpiece side is the central axis of horizontal rotation of the circular saw blade, so the workpiece can be set on the workbench with a predetermined depth of cut. Then, the circular saw blade is raised and lowered to make the first cut into the workpiece, and then the circular saw blade is horizontally rotated by a predetermined angle and fixed,
Accurate tenon processing can be performed simply by raising and lowering the machine, there is no need to move the workpiece, there is no need to provide two drive parts, and the mechanism can be extremely simple. In addition, as mentioned above, since the vertical axis passing through the intersection of the horizontal line passing through the rotation center of the circular saw blade and the tip of the circular saw blade on the workpiece side is the horizontal rotation center axis of the circular saw blade, the first The tip of the first notch and the tip of the second notch match extremely accurately, and extremely accurate tenon processing can be performed without very careful machining.

[Brief explanation of the drawing]

Fig. 1: A perspective view of one embodiment of the present invention, Fig. 2: A schematic layout showing the suspended state of the chain of the present invention, Fig. 3: An embodiment of the workpiece used in the present invention. Partially enlarged perspective view. A...mortise machine, O...rotation center, H...horizontal line, V...horizontal rotation center axis, 1...workpiece material,
2...Workbench, 3...Circular saw blade, 4...Rotating axis.

Claims (1)

[Scope of utility model registration request] A circular saw blade is arranged so that it can be raised and lowered and rotated horizontally on a workbench for fixing workpieces such as sash, and the horizontal line passing through the rotation center of the circular saw blade and the circular saw on the workpiece side A tenoning machine characterized in that the vertical axis passing through the point where the tips of the blades intersect is the central axis of horizontal rotation of the circular saw blade.