JPH0128974Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a shear angle adjusting device for a shearing machine, and is particularly suitable for a shearing machine for cutting printed wiring boards. Here, the shear angle means the angle of inclination of the upper blade fixed to the ram with respect to the lower blade fixed to the table.

2. Description of the Related Art Generally, in a shearing machine, a turnbuckle is provided on one drive member connected to an eccentric wheel for raising and lowering a ram, and the length of the turnbuckle is adjusted to change the shear angle. With such a device, when the shear angle changes, it is necessary to connect the plate holder, making the operation complicated and cumbersome. However, this was hardly a problem since a nearly constant shear angle is sufficient to cut metal plates, but in shearing machines that cut printed wiring boards, materials with different properties are used for printed wiring boards. Therefore, it is necessary to constantly change the shear angle.

Problems to be Solved by the Invention This invention provides a shear angle adjustment device for a shearing machine that allows the shear angle to be adjusted by simple operations.

Means for Solving the Problems This invention includes a connecting member connected to one drive member for raising and lowering the ram, and an adjusting screw connected to the connecting member so that the vertical position near one end of the ram can be adjusted. The present invention provides a shear angle adjusting device for a shearing machine, characterized in that the connecting member is provided with a support portion that supports one side of the plate presser.

Embodiment An embodiment of this invention will be described below with reference to the drawings.

In one embodiment of this invention shown in the figure, 10 is a frame, 11 is a table having a lower blade 12 fixed to its tip, 13 is movable up and down with both ends guided by a guide device 15, and has an upper blade 16. The ram 17 is connected to an eccentric wheel (not shown).
This is a pair of drive members for raising and lowering 3.

18 and 20 respectively connect the drive member 17 with the connecting shaft 2.
1 and a spherical sliding bearing 22 to connect the connecting member in a tiltable manner. One connecting member 18 is fixed to one end of the ram 13 by a bolt 23. 2
A guide pin 4 is fixed to a mounting portion 25 formed on the connecting member 18, and is movable up and down along a groove 27 formed in a groove member 26 fixed to the frame 10. Therefore, this guide pin 2
4 restricts the position of one end of the ram 13 in the left-right direction. Instead of providing such a guide pin 24, the arrangement of the ram 13 in the left and right direction may be restricted by providing means for regulating the position of the drive member 17 in the left and right direction. 28 is Ram 13
A holding space formed on the back surface near the other end accommodates the connecting member 20 so as to be movable in the vertical direction, and is composed of a pair of side plates 30 and a cover 31 surrounding the back surface thereof. Reference numeral 32 denotes a pair of attachment parts protruding from the ram 13 above this holding space, and reference numeral 33 denotes an adjustment member extending in the vertical direction that passes through each of the attachment parts and is screwed into a screw hole 35 drilled from above in the connecting member 20. It's a screw. Reference numeral 36 denotes a large diameter portion formed on this adjustment screw, and a thrust bearing 37 is arranged between each mounting portion 32, so that the adjustment screw 33 is held at a predetermined position in the vertical direction with respect to the ram 13. It's becoming like that. Therefore,
By rotating the operating portion 38 at the upper end of the adjustment screw 33 using a handle or the like (not shown), the end of the ram 13 can be raised and lowered relative to the connecting member 20 to change the inclination and adjust the shear angle. There is. 4 and 5 show cases where the ram 13 is at the top dead center and the shear angle is small and large, respectively. Reference numeral 40 denotes a scale plate superimposed and fixed on the surface of the cover 31, and the gauge 41 attached to the connecting member 20
The shear angle is now required.

43 is a plate presser having a plurality of pressing parts 45;
Elongated holes 46 and 47 extending in the vertical direction are provided near both ends. A support portion 48 projects forward from above the portion of the ram 13 to which the connecting member 18 is fixed, is inserted into the elongated hole 46, and supports one end of the plate holder 43 when the ram 13 is raised. 50 protrudes from the connecting member 20 and passes through an elongated hole 51 formed in the ram 13 and extends in the vertical direction, and is inserted into the elongated hole 47 to connect the ram 13.
This is a support portion that supports the other end of the plate presser 43 when the plate presser 43 is raised. Reference numeral 52 denotes a helical spring that exerts elasticity to press down both ends of the plate holder 43. When the ram 13 is at the top dead center, the plate holder 43 is attached to the support parts 48 and 50.
When the ram 13 descends, the plate holder 43 descends and presses a plate (not shown) on the table 11 to be cut by the action of a spring 52. There is. Even if the shear angle is adjusted by changing the inclination of the ram 13, the heights of the supports 48 and 50 do not change, so there is no need to adjust the plate holder 43.

Effects of the invention As mentioned above, this invention is provided with an adjustment screw 33 that allows the position of the ram 13 to be adjusted in the vertical direction with respect to the connecting member 20 connected to one of the drive members 17 that raises and lowers the ram 13. And on this side, the support part 50 that supports the plate holder 43 is connected to the connecting member 2.
Since the shear angle is set at 0, it is only necessary to turn the adjustment screw 33 when adjusting the shear angle, which has the effect of significantly simplifying the operation.

[Brief explanation of drawings]

Fig. 1 is a rear view showing an embodiment of this invention, Fig. 2 is a front view thereof, and Fig. 3 is an A--
A sectional view, FIG. 4 is a BB sectional view in FIG. 1, FIG. 5 is a sectional view corresponding to FIG. 4 when the shear angle is increased, and FIG. 6 is a connecting portion between the driving member and the connecting member. FIG. 10 is a frame, 11 is a table, 12 is a lower blade, 13 is a ram, 16 is an upper blade, 17 is a driving member,
18 and 20 are connecting members, 33 is an adjustment screw, 43 is a plate holder, 48 is a support portion, and 50 is a support portion.

Claims (1)

[Scope of utility model registration request] It includes a connecting member connected to one drive member that raises and lowers the ram, and an adjustment screw that connects the connecting member so that the vertical position near one end of the ram can be adjusted, and supports one side of the plate holder. A shear angle adjusting device for a shearing machine, characterized in that a support portion is provided on the connecting member.