JPS5933585Y2 - Wheel front cover device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wheel front cover device that adjusts the wheel front cover to an appropriate position as the diameter of the wheel decreases.

The purpose of the present invention is to prevent the distance between the tip of the front cover of the grinding wheel and the outer peripheral surface of the grinding wheel from changing regardless of the reduction in the diameter of the grinding wheel.

The conventional grinding wheel front cover is rotated by an appropriate drive device around the hinge pin every fixed amount as the diameter of the grinding wheel decreases. The rotation method of the grinding wheel front cover and the decreasing direction of the grinding wheel diameter are consistent, and as the grinding wheel diameter changes, the distance between the outer peripheral surface of the grinding wheel and the tip of the grinding wheel front cover changes, and the cover function is improved. There was a problem with the decline.

The present invention was devised to solve these conventional problems, and by moving the tip of the front cover of the grinding wheel in the decreasing direction of the grinding wheel diameter, that is, along the radial direction of the grinding wheel, the outer circumference of the grinding wheel can be reduced. The feature is that the distance between the face and the tip of the front cover of the grinding wheel is made to be approximately constant.

Below, embodiments of the present invention will be described based on the drawings.
10 in Fig. 2 is a grinding wheel, and this grinding wheel 1
A grinding wheel guard main body 11 is fixed to a grinding wheel stand (not shown) so as to cover the upper and lower parts, the rear part, and one side of the grinding wheel.

This grinder guard main body 11 is provided with a grinder guard side plate 12 that covers the other side of the grinder 10, and a grinder guard side plate 12 is provided above the front of the grinder guard main body 11 so as to cover the front part of the grinder 10. A cover 13 is pivotably supported around a hinge pin 14.

A holder 15 is fixed to the side surface of the grinding wheel front cover 13, and a first rotating member 16 is supported on the holder 15 in parallel with the hinge pin 14, and a holder 15 is attached to the grinding wheel guard side plate 12. 17 is fixed, and a second rotating member 18 is supported on this holder 1γ in parallel with the hinge pin 14.

A drive device 19 is integrally fixed to the second rotating member 18 by a pin 20, and an adjustment screw shaft 21 is rotatably supported by the drive device 19.

This adjusting screw shaft 21 has one end connected to the first rotating member 16.
The drive unit 19 is screwed into the drive unit 19 and rotated by a ratchet type rotation unit 22 built in the drive unit 19 via a reduction gear unit 23 .

Therefore, as the adjustment screw shaft 21 rotates, the first rotating member 16 is gradually screwed into the adjustment screw shaft 21.
As a result, the first rotating member 1 is rotated using the second rotating member 18 as a fulcrum.
6 is moved back and forth, and the front cover 13 of the grinding wheel is pivoted around the hinge pin 14.

In addition to such a grindstone front cover device, the present invention is characterized in that the mounting position of the hinge pin 14 and the mounting angle of the adjusting screw shaft 21 are set as follows.

That is, the center O of this hinge pin 14 is located at each intersection point A of the outer circumferential surface C1 of the grinding wheel 10 at the initial stage of use, the outer circumferential surface C2 of the grinding wheel 10 that has reached the limit of use, and the radius line of the grinding wheel 10.
I.

A position Bl shifted from A2 by a predetermined distance S on the radius line is provided on a line M passing through the midpoint F of B2 and perpendicular to the radius line, and with this hinge pin 14 as the center. The front end 13a of the front cover 13 is rotated over the positions B1 and B2.

For this reason, the tip 13a of the grinding wheel front cover 13 is moved in the direction of decrease in the grinding wheel diameter, that is, along the radial line of the grinding wheel 10, and the driving device 19 moves the tip 13a of the grinding wheel front cover 13 at the same rate as the amount of reduction in the grinding wheel diameter. The distance S between the tip 13a of the front cover 13 of the grinder and the outer circumferential surface of the grinder can be kept constant by rotating the grinder at a constant unit angle.

The mounting angle of the adjustable screw shaft 21 in the housing is determined by the first rotating member 16 when the grinding wheel 10 is in the initial stage of use or when the field of use is reached.
The straight line M connecting the center points Gl and G2 is set to be almost parallel to the straight line M, so that the moving direction of the adjusting screw shaft 21 and the moving direction of the first rotating member 16 are almost parallel to each other. It is designed so that the unit angle rotation amount of the grinding wheel front cover 13 does not fluctuate.

As mentioned above, the present invention allows the grinding wheel to pass through the midpoint of the intersection of the radius line of the wheel and each circumference that is slightly larger than the diameter of each wheel at the initial stage of use and when the wheel reaches its service limit. A hinge pin supporting the front cover of the grinding wheel is provided on a line perpendicular to the radial line, and a hinge pin is provided on a line passing through each center position of the first rotating member when the grinding wheel is in the initial stage of use and when it has reached its limit of use. Because the screw shaft that rotates and moves the grinding wheel front cover is located, the turning angle of the grinding wheel front cover relative to the unit rotation of the screw shaft can be maintained constant, and the tip of the grinding wheel front cover can be almost rotated. It is possible to move along the radial line of the grinder, and as a result, the distance between the tip of the front cover of the grinder and the outer peripheral surface of the grinder can be maintained constant, and the cover function of the grinder can be improved.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the grinding wheel front cover device of the present invention, and FIG. 2 is a plan cross-sectional view taken along the line ■-■ in FIG. 13...Wheel front cover, 14...Hinge pin, 19...Drive device, AI, A2...
...Intersection, B1゜B2...Position, C1, C
2...Outer circumferential surface of the wheel, L...Radius line of the wheel.

Claims (1)

[Scope of utility model registration request] A wheel front cover is swingably supported by a hinge pin on the wheel guard that surrounds the wheel, and a first wheel is provided on the side of the wheel front cover and the wheel guard. A front millstone cover that pivotally supports second rotating members, a screw shaft rotated by a drive device is screwed onto one of the first and second rotating members, and is rotatably supported on the other. The device is a device that passes through the midpoint of the intersection of the radius line of the wheel and each circumference having a slightly larger diameter than the diameter of each wheel at the initial stage of use and when the wheel reaches the limit of use, and The hinge pin is provided on a line perpendicular to the radius line, and the first hinge pin is provided on a line perpendicular to the radius line, and
A wheel front cover device characterized in that the screw shaft is located on a line passing through each center position of the rotating member.