JPS5818970Y2 - eccentric shaft device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an eccentric shaft device in which a movable blade in a processing device for drilling or cutting a member is slid up and down by rotation of a rotary ring.

Generally, when connecting the ends of members used for window frames, etc., and assembling them, the processing equipment for members that performs cutting or drilling into predetermined dimensions is as shown in Figures 1 and 2. A movable blade 3 is inserted into the main body 2 fixed above and can be slid up and down, and the movable blade 3 is formed with a sliding groove 4 into which an eccentric shaft 5 is fitted. , the movable blade 3 is configured to slide up and down by rotation of the eccentric shaft 5.

The eccentric shaft 5 has rotating rings 6a on both sides of the movable blade 3.
, 6b with set bolts 7, and the rotating rings 6a, 6b are fixed to the pedestals 8a, 8 fixed to the base plate 1.
The rotating ring 6 a is rotatably supported by the rotating ring 6 a ,
6b is assembled into the pedestals 8a and 8b with retaining bolts 9.

The rotating rings 6 a and 6 b are manual handles 10
It is rotated via the drive section 12 by the operation.

At this time, the eccentric shaft 5 fixed to the rotating rings 6 a and 6 b moves inside the sliding groove 4 of the movable blade 3 to point 5', and the blade bodies 13 and 14 attached to the movable blade 3 move downward. It moves and cuts or drills into the diagonally shaded portion 16 of the member A, which is the workpiece, between it and the fixed blade 15 on the main body 2.

In the case of this processing, the workpiece A is placed on the main body 2 with its front end inserted and its rear end protruding forward of the main body 2, as shown in FIG.

Here, since the sliding groove 4 of the movable blade 3 into which the eccentric shaft 5 fits is formed in the horizontal direction perpendicular to the vertical sliding direction of the movable blade 3, It is not possible to change the length of the movement (stroke).

Even if the length of the vertical movement cannot be varied in this way, when the workpiece is placed on the main body 2 as described above, the workpiece A does not exist within the operating trajectory of the handle 10. Therefore, the handle 10 can be easily operated without any hindrance.

However, depending on the location of the workpiece A to be machined, there are cases where the workpiece A cannot be placed and machined as shown in FIG. 2 above.

That is, depending on the part of the workpiece A to be machined, the workpiece A may have to be placed within the operation locus of the handle 10, and in that case, the handle 10 must be operated by the handle 10 so that the workpiece A You must try to complete the notch before it hits.

Therefore, in this case, it is necessary to increase only the stroke required for notching out of the limited stroke of the movable blade, but this adjustment has not been possible with conventional notching machines.

In this invention, the sliding groove of the movable blade into which the eccentric shaft of the processing device fits is formed at an angle of inclination with respect to the vertical sliding direction, and the length of the vertical movement of the movable blade can be adjusted by operating the handle. The purpose of this invention is to provide an eccentric shaft device whose purpose is to bring about a change in the angle of rotation.

Hereinafter, an embodiment of this invention will be explained in detail based on FIGS. 3 and 4 while comparing it with a conventional example.

FIG. 3 shows a conventional example a in which the sliding groove 4 of the movable blade 3 into which the eccentric shaft 5 fits is formed horizontally, and a conventional example a in which the sliding groove 4 has an inclination angle of 30 mm.
FIG. 4 is an explanatory view of the operation of the embodiment C formed at 45° and 45°, comparing it with C under the same conditions.

That is, A shows the stroke S in each of Examples a, l), and c when the l-1' line connecting the centers of the rotating rings 6 a and 6 b and the center of the eccentric shaft 5 is set at 45 degrees, and , the mouth shows the stroke S when the l-1' line in A is rotated 45 degrees to the horizontal state, and C shows the stroke S when the mouth is rotated 45 degrees from the horizontal state. , the length of this stroke S shows a comparison of the length with respect to 111'1 in the state of the mouth.

FIG. 4 shows that when the rotating rings 6a and 6b are rotated 90 degrees, the total stroke moved by the eccentric shaft 5 is 2S,
If the eccentricity d=as and the inclination angle of the sliding groove 4 are α, then the stroke S1 when the shaft is rotated by 45° is when it is opened from A, so s,=(,/”Z- 1) S-tan
α+S...(I).

Further, when the shaft is rotated by 45 degrees from the mouth to the "C", the stroke S2 becomes 52-2S-Sl (II).

Based on the above equations (I) and (II), the relationship between the stroke S and the groove inclination angle α is as shown in the following table.

Because of the above relationship, in the vertical movement of the movable blade, by tilting the sliding groove of the eccentric shaft, it is possible to change the length of the vertical movement due to the rotation of the shaft.

Further, the inclination direction of the sliding groove 4 according to the present invention is the third one mentioned above.
It is not limited to the case where the opening is upward as shown in C in the figure, but it may be set to open downward.
In that case, the moving lengths Sl and S2 of the movable blade will have the opposite result to the above-mentioned result.

Therefore, the direction of inclination of the sliding groove 4 may be appropriately set upward or downward depending on the location of the notch in the workpiece.

In other words, according to this invention, for example, when machining a building component, the stroke can be changed by operating the handle in a certain manner depending on the cutting situation, so that the notch machining can be done without the workpiece being an obstacle. It is extremely easy to do.

Furthermore, according to the present invention, even when different notching operations are performed simultaneously using multiple movable blades, the force can be distributed within a limited stroke by changing the inclination angle of each sliding groove. It also has practical effects such as being able to reduce the driving force.

[Brief explanation of drawings]

Fig. 1 is a front view showing a processing device for a member having a movable blade that can slide up and down, Fig. 2 is a side view of the same, and Figs.
The figure is an explanatory view of the operation of the conventional example and the embodiment according to this invention, comparing the amount of stroke change when changing the inclination angle of the sliding groove of the movable blade into which the eccentric shaft fits. 1... Base board, 2... Body, 3...
...Moving blade, 4...Sliding groove, 5...Eccentric shaft, 6a, 6b...Rotating ring, 7.
.....Set bolt, 8a, 8b ....cradle, 9 ....retention bolt, 10 ....manual handle, 12.bending/driving section, 13゜１４・・・・・・
・Blade body, 15...Curved fixed blade, 16...Curved diagonal line part, A...
Curved member, S...stroke, d...bending eccentricity,
α...Inclination angle of the curved groove, β...Handle turning angle.

Claims (1)

[Scope of utility model registration request] In a processing device that performs cutting or drilling at a predetermined position on a workpiece placed on the top surface of the main body using a fixed blade on the main body fixed to a base plate and a movable blade that slides up and down, the movable blade is moved up and down. An eccentric characterized in that a sliding groove into which the eccentric shaft is fitted is formed at a predetermined angle of inclination with respect to the vertical sliding direction of the movable blade, and the amount of vertical movement of the movable blade is changed. axis device.