JPS64562Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a displacement measuring device, and is particularly suitable for use in dial gauges, linear gauges, limit gauges, etc., and has a measuring tip slidably supported on a main frame, and the tip of the measuring tip is attached to the object to be measured. The present invention relates to an improvement in a displacement measuring device that measures the length of an object to be measured based on the amount of displacement of a measuring tip when brought into contact with the object.

[Conventional technology]

It has a measuring head that is slidably supported on the main frame, and the length of the object to be measured can be measured from the amount of displacement of the measuring head when the tip of the measuring head comes into contact with the object to be measured. Dial gauges or linear gauges, and limit gauges that detect whether the dimensions of the object to be measured are within an allowable range, for example, a tolerance, are known based on the amount of displacement of a measuring point. Such displacement measuring devices have a function that allows the probe to be quickly retracted within a predetermined range in order to repeatedly measure objects of the same size, and a function that allows the measurement point to be moved back quickly within a predetermined range in order to repeatedly measure objects of the same size. , that is,
There is a demand for a function that allows the measurement range to be changed significantly. However, until now, there has been no displacement measuring device that fully satisfies both of these functions, and therefore, for example, when making measurements, first the probe is brought into contact with a reference body placed on a reference surface such as a surface plate. It is necessary to obtain a reference value using the reference value, or to set an upper limit value or a lower limit value by moving a predetermined amount from the reference value. Therefore, for each object to be measured, it is necessary to prepare a reference body that is processed with high precision so that the deviation from the reference value is zero, and such a reference body cannot be processed in the same processing process as the object to be measured. , it was an extremely heavy financial burden. In addition, it is difficult to set the measuring tip exactly to the reference value or set value, and the work efficiency is poor.For example, when the display is a digital display and only the release is used as the measuring tip driving means, In particular, it was difficult to match the display of the least significant digit to the reference value or set value, and in some cases, setting was impossible. Furthermore, the drive mechanism by the release has conventionally been disposed inside the main body of the dial gauge or the like. Therefore, when the release is removed from the main body, it is necessary to prevent dust from entering through the release mounting hole, which directly communicates the inside and outside of the main body. For example, dust-proof measures such as covering the release mounting hole are required. becomes. Further, since the release mechanism is disposed inside the main body, there are many positional restrictions on other main body mechanisms, resulting in an increase in the size of the displacement measuring device. Furthermore, since the mounting position and direction of the release are limited by the position of the release mounting hole provided in the main body, there have been problems such as inconvenience in mounting and operating the release.

[The problem that the idea aims to achieve]

The present invention has been developed to eliminate the above-mentioned drawbacks of the conventional methods, and has a simple structure that allows the probe to be accurately and quickly set at any reference position while making effective use of the stroke of the probe. In addition to being adjustable, repeated measurements at any preset reference position can be performed quickly and easily.Moreover, there is no need for dust-proof measures such as covering the release mounting hole, and there are no positional restrictions on the main body mechanism. Furthermore, it is an object of the present invention to provide a displacement measuring device in which a measuring element can be operated by releasing from any position with respect to a main body such as a digital display section or a dial scale.

[Means to achieve the task]

The present invention has a gauge head that is slidably supported on a main frame, and the length of the target object can be determined from the amount of displacement of the gauge head when the tip of the gauge head comes into contact with the target object. In a displacement measuring device configured to measure the displacement of a device, a ring rotatably held by the screw feeding device and supporting the conical surface of the cone outside the device main body, and a tip of a wire tube fixed to the ring outside the device main body. In addition, the above object is achieved by including a release whose tip operating portion is engaged with the conical surface of the conical body and which moves the probe back by a predetermined amount during operation. In addition, the screw feeding device is constructed from a coarse screw and a fine screw to improve ease of use.

[Effect]

In this invention, since a screw feed device and a release are used together, the screw feed device can be used to accurately and quickly move the gauge head to any reference position while making effective use of the stroke of the gauge head. Can be set and adjusted. Further, by using the release, repeated measurements can be quickly and easily performed at any reference position set by the screw feeding device. Furthermore, since the release is attached to the ring outside the device body, there is no need to provide a release mounting hole in the device body that directly communicates the inside and outside of the device body, and there is no need for dust-proofing measures such as covering the release mounting hole. It is. Furthermore, even if the cone is lifted by the release, the probe is slidably held in the main body through a gap that is extremely small and has a long path, so there is no risk of dust entering the interior of the main body. Furthermore, since there is no need to attach the release to the main body of the device, the main body mechanism is not subject to any positional restrictions due to the release mechanism. In addition, since the ring to which the release is attached is rotatable, the contact point can be operated with the release from any position relative to the digital display or dial scale, making it easy to attach and operate the release. Become.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the first embodiment of the present invention has a gauge head 12 slidably supported by a main frame 10, and a tip 12a of the gauge head 12 is brought into contact with an object to be measured. An electric dial gauge with a digital display type that electrically measures the length of the object to be measured based on the amount of displacement of the measuring point 12 and displays it digitally. a conical body 14 whose apex is screwed to the rear end of the measuring element 12, that is, the upper end in the figure; A ring 16 is rotatable around the body 14, the tip of a wire tube 18a is screwed onto the ring 16 outside the device body, and the tip actuating portion 18b is engaged with the conical surface 14a of the cone body 14. When the contact point 12 is
Release 18 for retracting the camera by a predetermined amount above the figure.
and a feed nut (screw feed device) 19 with a large pitch that is screwed into a male threaded portion 10b formed at the top end of the main frame for adjusting the distance between the ring 16 and the top end of the main frame. It is something. In the figure, reference numeral 20 denotes a rod for preventing rotation of the measuring element 12, whose right end is fixed to the measuring element 12 and whose left end is slidably guided by a guide 10a formed on the main frame 10. Reference numeral 22 denotes a tension spring that is stretched between the probe 12 and the tip of the main frame 10 and is used to apply measurement pressure to the probe 12 . Reference numeral 24 denotes a main scale fixed to the side surface of the measuring element 12, in which light transmitting parts and non-light transmitting parts are alternately formed. Reference numeral 26 denotes a light source (not shown) for detecting the amount of vertical displacement of the gauge head 12 from the displacement of the main frame 24 due to the movement of the gauge head 12, and a light transmitting part and a non-transparent part similar to the main scale 24. This is a photoelectric displacement detection device that includes index scales formed alternately, and a light receiving element that receives light transmitted through the main scale 24 and the index scale. The output of this photoelectric displacement detection device 26 is input to a digital display section (not shown), and
The amount of displacement from the reference position of No. 2 is digitally displayed. The action will be explained below. First, when measuring a new object to be measured, or
If it is necessary to adjust the reference position of the probe 12, such as when the dimensions of the object to be measured change, turn the feed nut 19 while looking at the value displayed on the digital display (not shown). By adjusting the distance A between the upper end of the main frame and the ring 16, the reference position can be quickly obtained. On the other hand, when repeatedly measuring objects of the same size after adjusting the reference position, by operating the release 18 after the measurement is completed, the tip actuating portion 18b is projected to the left in FIG. let Then, due to the action of the conical surface 14a of the conical body 14, the measuring stylus 12 is retracted upward in the figure by a predetermined amount, so that the object to be measured can be easily replaced and repeated measurements can be carried out quickly. be able to. At this time, the ring 16 is attached to the feed nut 19.
Release 1
8 can be installed at a desired position, and the operability of the release 18 can be improved. In the embodiment described above, the pitch of the feed nut 19 is large, and the feed nut 19 performs coarse movement feed, and the release 18 performs fine movement feed, but it is possible to make the pitch of the feed nut 19 small. Accordingly, the feed nut 19 may be used to perform fine movement feed, and the release 18 may be used to perform coarse movement feed. A second embodiment of the present invention is shown in FIG. This embodiment is a digital display type electric dial gauge having a main frame 10, a measuring point 12, a cone 14, a ring 16, a release 18, etc., similar to the first embodiment.
A screw feeding device for adjusting the distance A between the upper end of the main frame 10 and the upper end of the main frame 10 is connected to a coarse screw portion 30a with a large pitch that screws into the female screw portion 10c formed at the upper end of the main frame 10, and a rotary knob 30.
b. It is composed of a feed bolt 30 consisting of a small pitch fine adjustment threaded portion 30c formed on the upper part of the rotary knob 30b, and a feed nut 32 screwed into the fine adjustment threaded portion 30c. The other points are the same as those of the first embodiment, so the explanation will be omitted. In this embodiment, when adjusting the reference position of the contact point 12, first, coarse movement adjustment is performed by rotating the rotation knob 30b, and then, by rotating the feed nut 32. Fine adjustment can be made by adjusting the reference position quickly and easily.
Moreover, it can be performed accurately. In all of the above embodiments, the present invention has the following features:
Although the invention was applied to an electric dial gauge equipped with a digital display, the scope of application of the present invention is not limited thereto, and is applicable to electric linear gauges and limit gauges equipped with a digital display, or mechanical dials. It is clear that the invention can be similarly applied to gauges and the like.

[Effect of the idea]

As explained above, according to the present invention, with a simple structure, it is possible to accurately and quickly set and adjust the gauge head to any reference position while making effective use of the stroke of the gauge head. Repeated measurements can be made quickly and easily at any reference position. Moreover, if the release mounting hole is covered, there is no need for dustproof measures. Furthermore, there is no positional restriction on other main body mechanisms due to the release mechanism, and the displacement measuring device can be downsized. In addition, the mounting position and direction of the release are not limited, and the release can be mounted from any direction relative to the main body, such as the digital display section or dial scale, making it easy to install the release.
It has excellent effects such as improved operability.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the configuration of the first embodiment of the displacement measuring device according to the present invention, and FIG.
FIG. 2 is a cross-sectional view showing the configuration of essential parts of the embodiment. 10...Main frame, 10b...Male thread part, 10c...Female thread part, 12...Measuring head, 12
a... Tip, 14... Cone, 14a... Conical surface, 16... Ring, 18... Release, 18a
...Wire tube, 18b...Tip operating section, 1
9...Feed nut, 30...Feed bolt, 30a
……Coarse adjustment screw portion, 30c……Fine adjustment screw portion, 32…
...Okuri Natsuto.

Claims (1)

[Claims for Utility Model Registration] (1) It has a gauge head that is slidably supported on a main frame, and from the amount of displacement of the gauge head when the tip of the gauge head comes into contact with the object to be measured, A displacement measuring device configured to measure the length of an object to be measured, etc., includes a conical body whose apex is fixed to the rear end of the measuring element that protrudes outside the device body, and a conical body that can move forward and backward into the rear end of the main frame. a screw feed device screwed onto the screw feed device; a ring rotatably held by the screw feed device and supporting the conical surface of the cone outside the device body; and a wire attached to the ring outside the device body. Displacement measurement characterized by comprising: a release to which the tip of the tube is fixed, and a tip operating portion is engaged with the conical surface of the conical body, and retracts the measuring point by a predetermined amount when activated. Device. (2) Utility model registration claim No. 1, in which the screw feeding device is composed of a coarse adjustment screw and a fine adjustment screw.
Displacement measuring device described in Section.