JPH0213921Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a squareness measuring instrument, and by providing an adjustment notch at the base end of the main scale and an adjustment screw for adjusting its opening, the squareness standard as a squareness measuring instrument is established. This allows fine adjustments to be made easily and reliably at any time.

As is well known, a squareness measuring instrument has a main scale that stands upright on a base, a slider fitted onto the main scale, and a gauge means protruding from one side of the slider. The most important point in this case is
Because it is a measuring instrument, the main scale is more completely upright.

Therefore, there is a method disclosed in Japanese Utility Model Application Publication No. 49-28046 that adjusts the perpendicularity between the base and the main scale. This is done by attaching the main scale to the base so that it can swing freely around the horizontal axis, and by bringing the main scale into contact with the bolts at the top and bottom positions of the horizontal axis, the swinging position can be adjusted, and the main scale relative to the base can be adjusted. This is to obtain the perpendicularity of .

However, with the above conventional system, the perpendicularity can be adjusted by alternately twisting one and the other of the bolts at the top and bottom positions of the horizontal axis, bringing the main scale into contact with each bolt, and adjusting the vertical position of the main scale. It is necessary to define That is, in order to position the main scale at a predetermined right angle position, it is necessary to twist and adjust the bolts at two positions, the upper and lower positions, which is a troublesome adjustment. Furthermore, if a highly accurate squareness is to be obtained, it is usually not possible to obtain a predetermined squareness by one adjustment, and therefore, the adjustment work is extremely complicated with conventional devices. Furthermore, with conventional models, the squareness adjustment bolt itself has the function of fixing the swing of the main scale relative to the base, so if the adjustment bolt becomes loose during squareness measurement work, the squareness It becomes impossible to measure.

The purpose of this invention is to solve the above-mentioned problems, and its characteristics are that a main scale is set upright on a base, a slider is fitted onto the main scale, and a slider is fitted on one side of the slider. In a squareness measuring instrument having a protruding gauge means such as a dial gauge, an adjustment notch with one end open is provided at the base end of the main scale, and by adjusting the degree of opening of the cut, it is possible to measure the squareness of the main scale with respect to the base. It is installed in the horizontal direction so that the angle can be changed and adjusted, an adjustment screw is provided to adjust the opening degree of the cut, and a means for releasably fixing the main scale to the base is provided so that changes in the opening degree of the cut can be controlled. At the point.

This invention will be explained below with reference to the illustrated embodiments.

FIGS. 1 to 4 show a preferred example thereof. Reference numeral 1 denotes a cast base for balance, and a bifurcated fitting groove 2 is formed at its front end.

This fitting groove 2 is for inserting the main scale 3 and fixing it in an upright position, and there are two upper and lower back bolts 4 that run in the front-back direction and four tension bolts 5 that run in the lateral direction. The main scale 3 is fixed.

This main scale 3 has a horizontal adjustment notch 6 on the front surface of its proximal end, and is configured to be located exactly at the middle height of the four tension bolts 5.

A ball receiver 8 for a push ball 7 is recessed on the upper surface side of the notch 6, while a screw hole 10 for screwing a vertical adjustment screw 9 is formed on the lower side. Of course, the adjustment screw 9 is one that can be rotated by external operation. By this means, when the adjusting screw 9 is screwed in, the notch 6 opens through the push ball 7, and only when a predetermined perpendicularity is obtained, can the upper two tension bolts 5, 5 be tensioned and fixed, and the predetermined regular measuring instrument can be set. This is the translation.

On the other hand, the main scale 3 that has been erected in this way has a rectangular cross section as shown in Figure 4, with its four corners cut out.
It is completed by chamfering at 45 degrees and forming the lifting guide surfaces 11 thereon, and the whole has a flat 8-sided shape.

Reference numeral 12 denotes a cylindrical slider that moves up and down along the main scale 3, and the entire slider 12 is formed into an octagonal shape that matches the outer peripheral shape of the main scale 3.

The slider 12 is divided into front and rear parts based on the measuring instrument, and is connected to each other by screws 13 from the left and right sides.
1. Both the divided pieces can be freely adjusted to advance and retreat in a state in which all of the lifting and lowering contact rollers 14 are in proper contact with each other. Four adjustment bolts 15 are screwed in from the back to advance and retreat, and the screws 13 are used to connect the rollers when a predetermined roller engagement/supporting position is obtained. Of course, the screw hole in this case has a small circumferential gap with respect to the screw 13 necessary for adjustment.

In addition, the slider 12 is equipped with rollers 14 that contact and support each elevation guide surface 11 and freely rotate with an inclined support shaft 16. In this case, the collar 17, roller 14, and support shaft 16 are assembled as one set. However, a pair of upper and lower V-shaped notches 18 are recessed in the front and rear surfaces of the slider 12, respectively.
After setting these through..., this notch 1
The cover piece 19 corresponding to item 8 is fixed with screws to complete the process. In this case, the piece 19 also serves as a stopper.

On the other hand, a mechanism for braking the slider 12 at an appropriate height is constructed as follows.

That is, 20 is a guide tube fixed to the middle part of the back of the slider 12 with a screw, and a hole 21 is formed on the slider 12 side in a coaxial relationship with this tube 20, and a brake shaft 22 that can move forward and backward is inserted through these. By attaching the rubber brake pad 24 to the brake element 23 integrally formed at the tip of the shaft, the spring 25
It is braked by pressure welding. In this case, the pressure of the spring 25 is initially set so that a grip 26 is screwed onto the outer end of the brake shaft 22, and by rotating the grip 26, a suitable braking force can always be obtained at a constant level without hindering the lifting and lowering.

In this way, the holder pin 27 is attached to the front of the slider 12.
is provided protrudingly, and the dial gauge 28 is attached thereto to complete the process.

In addition, 29 is a stopper made up of an O-ring fitted onto a pin, and 30 is a cushion fitted onto the base 1.

Therefore, as described above, the adjustment notch 6 and adjustment screw 9
The perpendicularity is adjusted before shipping, but in this case, screw means is used to make very fine adjustments, and the stability after adjustment is also high. In particular, since the push ball 7 is interposed to make point contact with the adjustment screw 9, it is advantageous because adjustment can be made more easily than when the screw 9 is brought into direct contact with the screw 9.

According to the present invention, the perpendicularity of the main scale to the base can be adjusted by simply twisting the bolt for adjusting the opening of the cut, and there is no need to use two adjustment bolts as in the conventional method, resulting in high work efficiency. It is particularly suitable for highly accurate adjustment.

Furthermore, since the perpendicularity between the main scale and the base is adjusted by adjusting the opening of the notch formed on the main scale itself, there is no need to use the opening adjustment bolt as a means for fixing the main scale to the base; By providing the fixing means, even if the adjustment bolt loosens during squareness measurement work, the squareness between the main scale and the base can be maintained and the measurement work will not be hindered.

[Brief explanation of the drawing]

Figure 1 is a left side view of a squareness measuring instrument showing an example of this invention, Figure 2 is its front view, Figure 3 is a left side view with the main part cut away, and Figure 4 is a cross-section of the main part. It is a front view. 1...Base, 3...Main scale, 6...Adjustment notch, 9...Adjustment screw, 12...Slider, 28
……Dial gauge.

Claims (1)

[Scope of utility model registration request] In a squareness measuring instrument, a main scale is provided upright on a base, a slider is fitted onto the main scale, and a gauge means such as a dial gauge is protruded from one side of the slider. An adjustment notch with one end open at the base end is provided in the horizontal direction so that the perpendicularity of the main scale to the base can be changed and adjusted by adjusting the opening degree of the notch, and an adjustment screw is used to adjust the opening degree of the notch. 1. A squareness measuring instrument, further comprising means for releasably fixing the main scale to the base so as to regulate changes in the cutting opening.