JPH0314294Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cutting device that can continuously adjust the weight load for pressing a workpiece against the cutting surface of a blade.

Conventionally, in order to press the blade onto the workpiece,
The workpiece is pressed against the blade from below with a constant pressure using an oil cylinder, air cylinder, etc. However, when a change occurs in the pressure of oil or air, this directly affects the pressing force of the workpiece, causing a reduction in the accuracy of cutting the workpiece. In addition, the sensitivity is poor, so as the cutting operation progresses, a type of vibration may occur and a momentary strong impact force may be generated on the workpiece.If the blade cannot respond sensitively to this force, the blade A strong force acts between the cutter and the workpiece, resulting in uneven cutting accuracy.

In addition, as shown in Figures 1 and 2, there is a fundo type that utilizes the principle of levers. This is designed to cut a work 2' held in a work holder 1' by pressing it against a blade 3'.
In this case, the lever principle is used, and the central part of the guide bar 4' is supported by the support stand 5', the workpiece 2' is pushed up at one end, and the weight 6' is suspended from the other end. The blade 3' is configured to be pressed against the workpiece 2' by this weight load. The weight load is adjusted by sequentially increasing or decreasing the base weight 6a', processing weights 6b', 6c', . . . as desired, to adjust the pressing force applied to the workpiece 2'. The blade 3' for cutting the workpiece 2' is fixed to the blade frame 7' and mounted on the machine base 8'.
It is placed so that it can move left and right on a rail (not shown) attached to the. Below the rail,
A work holder 1' is arranged, and a work 2' is fixed to the work holder 1' by a work mounting vice 1a', and is movable upward toward the blade 3'.

On the other hand, one end of the blade frame that fixes the blade 3' is pivotally connected to a crankshaft 10' via a pedestal 9', and is configured to reciprocate linearly by rotation of a rotating disk 11'. motor 12'
By driving the rotating disk 11',
The workpiece 2' protrudes upward from the workpiece holder 1' and is cut by the blade surface of the blade 3' which is in contact with the workpiece 2'. Incidentally, abrasive grains are injected onto the cut surface of the workpiece 2' through an abrasive grain pipe 16' from an abrasive grain tank 15'.

With the above configuration, the pressing force of the work holder 1' is adjusted by stacking and lowering the weights 6', 6a', etc., so the load becomes stepwise and fine adjustment is possible. is not possible. Furthermore, when starting work after lowering the workpiece 2', the weight 6' must also be removed from the guide bar 4', which has disadvantages such as poor work efficiency and troublesome work. .

In addition, at the start of work, the workpiece surface is uneven and it is difficult to set the blade so that the blade edges form the same surface, so it is important to adjust the initial weight load.
There is a problem in that the fine adjustment is complicated.

Furthermore, as described above, the weight load may be changed during the cutting operation, and at this time, an impact is applied to the blade, resulting in a problem that cutting accuracy deteriorates.

The present invention was devised to eliminate the above-mentioned drawbacks, and its purpose is to provide a cutting device that can continuously and subtly vary the weight load by configuring the weight to be slidable along the guide bar. It is something to do.

The feature is that it is equipped with a work holder that holds a work, and a pressing means that pushes up this work holder and presses the work against the cutting surface of the blade. The guide bar is rotatably fixed to a support base, one end of the guide bar is in contact with the work holder, and an adjustment part is attached to the other end of the guide bar so as to be slidable along the other end. At the same time, a rack is provided on one side of the other end of the guide bar, and a pinion that meshes with the rack on the other end is provided on the adjustment section, and the adjustment section is guided by rotating the pinion. A shaft is provided for moving the bar along the other end, and a fixing means is provided for fixing the adjustment part to a predetermined position on the other end of the guide bar, and a weight can be suspended from the adjustment part, and the adjustment part is The weight load can be continuously adjusted by sliding.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Figures 3 and 4 show an embodiment of the present invention, in which 1 is a cutting device, 2 is a blade, 3 is a blade frame to which a number of blades 2 are fixed, and a pedestal 4 is fixed to both ends. It is slidably placed on a rail 6 attached to the top plate 5. 6a is a rail cover, and 7 is a crankshaft, one end of which is pivotally connected to the pedestal 4 of the blade 2, and the other end to the rotating disk 9 via a crankshaft joint 8. The rotating disk 9 is the blade frame 3
The motor 11 rotates the motor 11 via a belt 10. Therefore, the blade frame 3 moves linearly back and forth due to the rotation of the rotating disk 9. 9a is a cover for the rotating disk 9, 11a is a pulley of a motor 11, and 12 is a work holder, which is disposed below the rail 6 and has a work holder presser 13 on its upper surface. Work holder 12
A slide block 15 is disposed on the lower surface of the holder with a holder cover 14 interposed therebetween. 16 is the shelf,
Slide block 15 via slide pedestal 17
is mounted so that it can be moved up and down. Reference numeral 18 denotes a cylindrical body attached to the shelf 16, through which the shaft 19 is inserted. One end of a guide bar 20 for vertically moving the work holder 12 is in contact with the lower surface of the shelf 16 via the slide block 15.

As shown in FIGS. 5 and 6, the guide bar 20
The middle part is a support stand 22 attached to the machine stand 21.
One end 20a contacts the work holder 12 and pushes it up, and the other end 20b supports the weight 25 via a weight hanging rod 24 hanging from the adjustment part 23. The work holder 12 is lifted up toward the blade frame 3 using the lever principle, and the work 34 is suspended.
is configured to be brought into contact with the blade surface of the blade 2. An adjustment section 23 is slidably attached to the other end 20b of the guide bar 20. Adjustment section 23
As shown in FIG.
is attached to the shaft 2 of this handle 26.
7 has a pinion 27a at its tip. The pinion 27a meshes with a rack 28 carved on the guide bar 20 so that it can slide on the guide bar 20 in the left-right direction. Therefore,
By moving the adjustment section 23 in the left-right direction, the weight load can be continuously adjusted. 32 is an abrasive grain nozzle, which is connected to the machine base 21 through a holder bar 33.
It is fixed at

Next, the operation will be explained.

First, the weight 25 suspended from the weight hanging rod 24 is brought close to the support body 22 so that the weight load is almost zero. Next, after the workpiece 34 is held in the workpiece holder 12,
Loosen the stopper handle 30 and use the moving handle 26 to move the adjustment part 23 to the guide bar 2.
The position of the adjustment part 23 is determined so that the blade surface of the blade 2 is in contact with the cutting surface of the work 34 held by the work holder 12 by sliding the other end 20b of the blade 2 to the left. guide bar 20
After the position of the adjustment part 23 on the other end 20b is determined, the handle 30 is screwed in to adjust the adjustment part 23.
to be fixed.

Next, the motor 11 is driven to rotate the rotary disk 9. This rotational movement of the rotary disk 9 causes the blade frame 3 to reciprocate linearly through the crankshaft 7, so the workpiece 34 is cut by the blade 2, and the workpiece holder 12 is pushed upward by the lever principle. The workpiece 34 is being cut. As the cutting operation of the workpiece 34 progresses, the weight load must increase, so
The adjustment section 23 may be sequentially moved to the left.

As described above, according to the present invention, a guide bar is rotatably fixed to a support base, one end of the guide bar is brought into contact with a work holder and pushed up, and a weight is attached to the other end of the guide bar. Hang it and make the adjustment part slide freely with a rack and pinion.
Since the weight load is adjustable, it is possible to continuously adjust the weight load as the workpiece cutting operation progresses, making it easier to make fine adjustments compared to conventional models that change it step by step. In addition to being reliable, it is possible to reduce the weight load to zero by simply moving the adjustment section to the support stand without removing the weight as in the conventional method, improving work efficiency. Furthermore, since the weight load can be adjusted continuously, the force for pushing up the work holder can also be finely adjusted, so there is no unevenness in the cutting accuracy of the work by the blade, and the sensitivity is good. Furthermore, compared to conventional systems using oil cylinders or air cylinders, there are no sudden fluctuations and a stable weight load is always obtained, resulting in good cutting accuracy.

Although the present invention has been variously explained above using preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

[Brief explanation of the drawing]

Figures 1 to 2 show a conventional cutting device, Figure 1 is a side view showing the inside, Figure 2 is a front view, and Figures 3 to 6 show an embodiment of the present invention. Fig. 3 is a side view showing the inside, Fig. 4 is a plan view, Fig. 5 is a side view of the guide bar, Fig. 6a is a vertical sectional view of the adjustment section, and Fig. 6b is an enlarged side view of the main part. It is a diagram. 1... Cutting device, 1'... Work holder, 1
a'...Workpiece mounting vise, 2...Blade, 2'
...Work, 3...Blade frame, 3'...Blade, 4...Scraper, 4'...Guide bar, 5...
Top plate, 5'... Support stand, 6... Rail, 6'... Weight, 6a... Rail cover, 6a'... Base weight, 6b', 6c'... Weight for processing, 7...
...Crankshaft, 7'...Blade frame, 8...Crankshaft joint, 8'...Machine base, 9...Rotating disk,
9a...cover, 9'...cradle, 10...belt,
10'...Crankshaft, 11...Motor, 11a
...Pulley, 11'...Rotating disk, 12...Work holder, 12'...Motor, 13...Work holder presser, 14...Holder cover, 15...
...Slide block, 15'...Abrasive grain tank, 1
6...shelf part, 16'...abrasive grain tube, 17...slide pedestal, 18...cylindrical body, 19...shaft, 20...guide bar, 21...machine stand, 20a...one end, 2
0b...other end, 22...support stand, 23...adjustment section, 24...weight hanging rod, 25...weight, 26...handle, 27...shaft, 27
a... Pinion, 28... Rack, 32... Abrasive grain nozzle, 33... Holder bar, 34... Work.

Claims (1)

[Scope of utility model registration request] It is equipped with a work holder that holds a work, and a pressing means that pushes up the work holder and presses the work against the blade surfaces of a plurality of blades, and this pressing means is rotatable using the middle part of the guide bar as a support base. One end of the guide bar is in contact with the work holder, and an adjustment part is attached to the other end of the guide bar so as to be able to slide freely along the other end of the guide bar. A rack is provided on one side of the other end, and a pinion that meshes with the rack on the other end is provided on the adjustment portion, and by rotating the pinion, the adjustment portion is attached to the other end of the guide bar. A shaft is provided for moving the adjusting section along the guide bar, and a fixing means is provided for fixing the adjusting section at a predetermined position on the other end of the guide bar, and a weight can be suspended from the adjusting section, and the adjusting section can be slid to move the adjusting section along the guide bar. A cutting device characterized in that weight loading can be continuously adjusted.