JPS5882Y2 - Height gauge with coarse/fine feed mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hide gauge that allows coarse and fine movement of the slider at - points.

In the hide gauge, a slider with a scriber is supported on a post so that it can move up and down, and the slider rotatably holds an operating handle.A rack is formed on the post, and a pin that is linked to the feed handle is attached to the rack. There is one in which the main on is engaged.

In this type of hide gauge, the slider moves up and down along the column by rotating the operating handle and rotating the pinion.

Through such an operation, the scriber held by the slider is brought into contact with the object to be measured, and the height is measured.

The contact pressure (i.e. measurement pressure) when this scriber contacts the object to be measured directly affects the measured value, so
It is desirable to keep this contact pressure constant.

However, the amount of movement of the slider relative to the amount of rotation of the operating handle is unique, and at the same time, the slider is structured to move coarsely due to rotation of the operating handle, and the amount of rotation of the operating handle cannot be adjusted based on the sense of the measurer. was.

For this reason, it has been difficult to finely adjust the contact pressure of the scriber to the object to be measured to optimize this contact pressure.

In such a hide gauge, the slider is operated coarsely to speed up the measurement until just before the scriber contacts the object to be measured, and from just before the scriber contacts the object to be measured until it comes into contact with the object. It is desirable to be able to finely adjust the contact pressure of the scriber to the object to be measured by slightly moving the slider.

The purpose of the present invention is to provide a hide gauge that meets this demand, and is characterized by a simple structure that allows coarse and fine movement of the slider.

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

In Fig. 1, 1 is a base, 2 is a column erected on base 1, 3 is a column erected on base 1, and 4 is a column support that spans the upper ends of columns 2 and 3. It is.

Racks 5 and 6 are formed in the opposing parts of the columns 2 and 3, respectively.

A slider 7 is supported by the pillars 2 and 3 so as to be movable up and down.

8 is a scriber attached to the slider 7.

9 is a dial display device attached to the slider 7; 10
is a counting device attached to the slider 7.

A pointer 11 (FIG. 2) of the dial display device 9 is interlocked with a pinion 14 via a pinion 12 and a gear 13.

This pinion 14 meshes with the rack 5.

15 is a pinion that meshes with rack 5, 16 is pinion 1
These gears are coaxially supported so as to be relatively rotatable, and a hairspring for backlash removal is installed between them.

A worm 17 (FIG. 3), which is connected to the counting device 10, is connected to a pinion 24 via a series of gear wheels 18, 19, 20, 21, 22, 23.

This pinion 24 meshes with the rack 6.

25 is a shaft rotatably supported by the slider 7.

A pinion 24 is fixed to this drive shaft 25.

A handle 26 having a small diameter shaft portion 26a is fixed to the end of the shaft 25 that projects outside the slider 7 via a nut 32 (see FIG. 3).

The drive shaft 25 protrudes through a hole 27a of a bracket 27 attached to the slider 4.

This bracket 27 is provided with a hole 28 (FIG. 4).

The hole 28 is located diagonally above the drive shaft 25.

One end of a fixed shaft 29 is press-fitted into this hole 28 (FIGS. 5 to 7).

This fixed shaft 29 is parallel to the drive shaft 25.

A groove 29a extending in the axial direction is formed in the fixed shaft 29 at a portion offset by 180° with respect to the portion facing the drive shaft 25.

A fine adjustment knob 30 is loosely fitted into the fixed shaft 29 so as to be freely rotatable.

This fine adjustment knob 30 is connected to the small diameter shaft portion 26 of the handle 26.
It has a shaft portion 30a facing the shaft portion 30a.

The circumferential surfaces of both shaft portions 26 a and 30 a are subjected to rough surface processing such as knurling.

Further, the small diameter shaft portion 26 a has a larger diameter than the shaft portion 30 a, and has a diameter that allows both shaft portions 26 a and 30 a to come into pressure contact with each other when the fine adjustment knob 30 is pressed toward the drive shaft 25 side. It is formed.

A spring 31 such as a leaf spring or a linear spring is interposed between the inner circumferential surface of the fine adjustment knob 30 and the flat surface 29a, and the shaft portion 30a of the fine adjustment knob 30 is connected to a small diameter shaft portion. 26
The spring is biased in the direction away from a.

Next, coarse and fine movement operations of the slider 4 of the hide gauge having such a configuration will be explained.

Normally, the shaft parts 26a and 30a are separated from each other by the action of the spring 31, so by turning the handle 26 as a coarse adjustment knob, the drive shaft 25 is moved from the handle 26 without rotating the fine adjustment knob 30. Rotate as one.

Further, when the fine adjustment knob 30 is pressed and displaced toward the drive shaft 25 side and the shaft portions 26 a and 30 a are pressed against each other, when the fine adjustment knob 30 is rotated, the handle 2
6 is smaller than the amount of rotation of the fine adjustment knob 30, the drive shaft 25 rotates much more minutely than when the handle 25 is turned.

As a result, the pinion 24 rotates due to the rotation of the drive shaft 25, and the slider moves up and down along the pillars 2 and 3. However, when the handle 26 is turned, the slider 4 moves coarsely and the fine adjustment knob 30 is moved. When turned, slider 4 moves slightly.

On the other hand, the dial display device 9 and the counting device 10 operate in accordance with the movement of the slider 4, and the scriber
A height of 8 is indicated.

By rotating the handle 26 in this manner, the slider 4 is coarsely moved up and down, and from just before the scriber 8 contacts the object to be measured until it comes into contact with the object, the fine adjustment knob is rotated to move the slider 4 slightly up and down.

In the embodiment described above, the shaft portion 30 of the fine adjustment knob 30
a and the small-diameter shaft portion 26 a of the handle 26 are always kept apart, and the shaft portion 26 a is opened only when the fine adjustment knob 30 is operated.
, 30a are in pressure contact with each other, but the present invention is not necessarily limited to this.

For example, as shown in FIG. 8, the shaft portion 33a of the fine adjustment knob 33 rotatably held by the slider 4 may be in constant pressure contact with the outer peripheral surface of the handle 26.

In this case as well, the circumferential surface of the shaft portion 33a and the circumferential surface of the handle 26 are subjected to rough surface processing such as knurling.

With this configuration, simply attaching a fine adjustment knob to the conventional hide gauge with handle allows coarse and coarse adjustment of the slider 4.
Can perform fine movements.

As explained above, in this invention, the fine adjustment knob is rotatably held by the slider and at the same time frictionally engaged with the outer circumferential surface of the handle for operating the slider, so that the scriber supported by the slider can be You can speed up the measurement by coarsely moving the slider until just before the scriber contacts the object, and by finely moving the slider from just before the scriber contacts the object to be measured. By finely adjusting the contact pressure, measurement errors can be prevented.

Furthermore, since the coarse and fine movements can be performed at one location, the coarse and fine movements can be performed quickly and easily.

Moreover, since the fine movement operation can be performed with a simple structure that includes only one fine movement knob, there is an advantage that an inexpensive fine movement operation means with a small number of parts and fewer failures can be provided.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a hide gauge according to an embodiment of the present invention, FIG. 2 is a diagram showing the arrangement of gears in the slider of the hide gauge shown in FIG. 1, and FIG. 1 is a partial sectional view, FIG. 4 is an exploded perspective view of the coarse/fine movement device of the slider, FIG. 5 is a partial plan view of the coarse/fine movement device, and FIG. 6 is a front view of FIG. 5. Figure 7 shows Vll-VI in Figure 6.
8 is a rear view of a hide gauge showing another embodiment of the present invention; FIG. 2.3...post, 4...slider,
26...Handle, 30.32...Fine movement knob.

Claims (1)

[Scope of utility model registration request] In a hide gauge in which a drive shaft of a handle rotatably attached to a slider is engaged with a column and the slider is moved up and down by rotation of the handle, the handle has a large diameter circumferential surface with a roughened outer periphery. and a fine adjustment knob having a roughened outer periphery and a circumferential surface smaller in diameter than the large diameter circumferential surface on the slider, the small diameter circumferential surface engaging with the large diameter circumferential surface. A hide gauge with a coarse/fine movement device that is rotatably mounted in the desired position.