JPS641604Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a spindle-type measuring instrument, and more specifically, a spindle having a contact at its tip that can come into contact with an object to be measured is supported by an apparatus main body so as to be displaceable in the axial direction, and the spindle The present invention relates to an improvement in the lifting and lowering mechanism of a spindle in a spindle-type measuring instrument that measures the dimensions, position, etc. of a measured object based on the amount of displacement. In a spindle-type measuring instrument such as a dial gauge, the main body of the device is fixed to a stand or the like, and the spindle is moved up and down as appropriate to bring the tip of the spindle into contact with the object to be measured to perform measurement work. Therefore, it is convenient to provide an elevating mechanism that can raise and lower the spindle without directly holding it. By the way, in the conventional elevating mechanism, a spindle is passed through the device main body, and a swinging lever that engages with an end of the spindle opposite to the contactor is pivotally supported by the device main body, and the swinging lever is pivoted. There was one in which the spindle was raised and lowered by dynamic operation. However, with such a conventional structure, a tilting force (eccentric force) is applied to the spindle when the spindle is moved up and down. There was a risk that the eccentric force would have an adverse effect on measurement accuracy. Furthermore, since there is a risk that the entire device body may be tilted by the lever, the stand must be strong and heavy. Furthermore, since the spindle is passed through the apparatus main body, a special sealing mechanism or the like must be applied to the penetrating portion. Furthermore, the operating position of the swing lever is limited depending on the mounting position of the swing lever, which may even make the measurement work inconvenient.

Furthermore, an elevating mechanism using a release or the like is known, but it tends to have a complicated structure, has almost the same drawbacks as the conventional structure using the swing lever, and furthermore, the elevating stroke of the spindle is large. It also had the disadvantage that it could not be removed.

The purpose of this invention is to eliminate the risk of adversely affecting measurement accuracy, have a simple structure, and eliminate the need for a particularly strong stand.Furthermore, the spindle can have a large vertical stroke, and is easy to handle. To provide an easy spindle type measuring instrument.

The present device aims to achieve the above-mentioned objective by attaching a spindle lifting lever directly to the spindle, which consists of a fitting portion that fits onto the spindle and a finger hook portion that extends from this fitting portion radially outward from the spindle, making the fitting portion C-shaped in cross section and elastic, and making the finger hook portion gradually thinner from the base end to the tip end, and raising and lowering the spindle via this spindle lifting lever.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows the overall structure of an embodiment of a spindle-type measuring instrument according to the present invention. In this figure, a stand 1 has a thick plate-like base 2, and the base 2 has support 3 are erected. A block-shaped fixture 4 is fitted onto the column 3 so as to be vertically displaceable, and the fixture 4 can be fixed at any position on the column 3 with a tightening screw 5.

A stem 7 protruding downward from the device body 6 in the drawing is fixed to the fixture 4 by tightening screws 8. A spindle 9 projects downward from the stem 7 in the figure, and the spindle 9 is supported by the device main body 6 via the stem 7 so as to be movable in the axial direction. Furthermore, a high-precision encoder (not shown) for detecting the amount of displacement of the spindle 9 is built into the main body 6 of the device, and the amount of displacement detected by this encoder is displayed on the display section 11. There is.

A contact 12 is provided at the tip of the spindle 9, and a measuring table 13 is provided on the upper end surface of the base 2 located vertically below the contact 12. In addition, the contactor 12 of the spindle 9
A spindle raising/lowering lever 14 is attached near the.

As also shown in FIG.
and a finger hook portion 14B extending radially outward. The fitting part 14A is formed into a substantially small cylindrical shape, and has a cutout part 15 on one side and has a cross section C.
It is said to be a letter. When the notch 15 is pressed toward the spindle 9, the spindle 9 is press-fitted into the fitting part 14A, and after press-fitting, the tightening force of the fitting part 14A acts on the spindle 9, and the lift lever is applied to the spindle 9. 14 can be fixed with appropriate frictional force. On the other hand, the tip side of the finger hook 14B is curved downward in the figure, so that the finger can be easily and reliably hooked onto the finger hook 14B.

Furthermore, the fitting portion 14A and the finger hook portion 14B are integrally formed from a synthetic resin material having appropriate elasticity and flexibility, and the finger hook portion 14B gradually becomes slender from the proximal end to the distal end. This makes it difficult for vibrations and the like on the distal end side to be transmitted to the proximal end side.

According to this embodiment, by hooking the fingertip onto the finger hook 14B of the spindle lift lever 14,
Alternatively, the spindle 9 can be moved up and down by grasping the tip of the finger hook 14B with a fingertip. Therefore, unlike the case where the spindle 9 is raised and lowered by a swing lever or the like, there is no risk of applying an eccentric force to the spindle 9, and there is an effect that there is no adverse effect on measurement accuracy. Further, the spindle lift lever 14 itself has an extremely simple structure, and can be easily attached to the spindle 9. Moreover, unlike the conventional structure using a swing lever or a release, the spindle lift lever 14 has a very simple structure and can be easily attached to the spindle 9. There is an advantage that there is no need to add any special structure for mounting or sealing.

In addition, in the conventional structure described above, the mounting position of the lifting mechanism was fixed, but in this embodiment,
As shown in FIG. 2, by rotating the spindle lifting lever 14 relative to the spindle 9,
4B or by changing the direction of the fitting part 1.
It is also easy to change the fitting position of 4A along the longitudinal direction of the spindle 9. Therefore, for example, when measuring a deep groove part, the mounting position of the spindle lift lever 14 is pulled up, and the finger grip part 14B is placed in a position where the measurement work is most convenient depending on the shape of the object to be measured, the measurement posture of the person being measured, etc. It is easy to place.

Furthermore, unlike the conventional structure using the release or the like, it is easy to increase the vertical stroke of the spindle 9.

Furthermore, the spindle lift lever 14 is made of a synthetic resin material, which is easy to manufacture and attach to the spindle 9. Furthermore, unlike metal materials, synthetic resin materials have extremely low heat transfer coefficients. There is no risk that the temperature of the fingertip of the measuring worker will be transmitted to the spindle 9 or the contactor 12 and adversely affect the measurement accuracy, and from this point of view as well, high precision measurement can be ensured. In addition, since the finger hook portion 14B has appropriate elasticity and has greater flexibility toward the distal end,
Vibrations, shocks, etc. on the tip side of the finger hook 14B are absorbed by the finger hook 14B and the spindle 9
It is difficult for the signal to be transmitted directly to the other side, which also ensures high precision measurement. Further, it becomes easy to perform measurement work in which the contact force (measurement pressure) when lowering the spindle 9 and bringing the contact 12 into contact with the object to be measured is made weak.

In carrying out the implementation, the structure of the fitting part is not limited to the one described in the above embodiment, but may be composed of two ring members having a C-shaped cross section, for example, as in the fitting part 24A of the spindle lifting lever 24 shown in FIG. , these two ring members may be connected to each other on the proximal end side of the finger hook portion 24B. Also,
The fitting part and the finger hook part do not necessarily have to be integrally molded, but a cylindrical fitting part 34A with a C-shaped cross section made of a synthetic resin material, as in the spindle lift lever 34 shown in FIG. The finger hook 34B and the finger hook 34B made of a metal plate or the like may be formed as separate members, and then the base end of the finger hook 34B may be attached to the fitting portion 34A.

Further, the fitting portion does not necessarily have to be made of a synthetic resin material, but if it is made of a synthetic resin material, various effects as described above can be obtained. Furthermore, the present invention is applicable not only to dial gauges with digital display, but also to dial gauges with analog display using pointers, and even to spindle-type measuring instruments other than dial gauges.

As described above, according to the present invention, there is provided a spindle-type measuring instrument that does not adversely affect measurement accuracy, has a simple structure, is easy to operate, and can have a long spindle stroke. can be provided.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the overall structure of an embodiment of a spindle-type measuring instrument according to the present invention, FIG. 2 is an enlarged perspective view showing main parts of the embodiment, and FIGS.
Each figure is an enlarged perspective view showing the structure of a spindle lift lever in mutually different embodiments other than the above. 1...Stand, 6...Device body, 7...Stem, 9...Spindle, 12...Contact, 14,
24, 34...Spindle lift lever, 14A,
24A, 34A... Fitting portion, 14B, 24B, 3
4B...Finger hook part, 15...Notch part.

Claims (1)

[Scope of utility model registration request] A spindle-type measuring instrument in which a spindle having a contact at its tip that can come into contact with an object to be measured is supported by a main body of the device so as to be displaceable in the axial direction, and measures the dimensions, position, etc. of the object to be measured by the amount of displacement of the spindle, A spindle raising/lowering lever is attached to the spindle, and includes a resilient fitting part that is fitted into the spindle and has a C-shaped cross section, and a finger hook part that extends radially outward of the spindle from the fitting part. . A spindle-type measuring instrument, characterized in that the finger hook is gradually made thinner from the base end side to the distal end side.