JPS589001A - Micrometer - Google Patents

Abstract

PURPOSE:To make locking and unlocking easy in a micrometer by providing a locking knob for operation of a locking mechanism to a knob for driving of a spindle. CONSTITUTION:The rack part 3A of a spindle 3 is moved forward and backward by a pinion 5 meshed with an operating knob 6. A semicircular locking knob 8 is mounted to a part in the outside circumferential part of the operating knob. A driving rack 11 is fixed to the knob 8 and is energized outward in the radial direction of the operating knob by means of a spring 12. A stopper 13 having a pinion part 14 meshed with the rack 11 is rotated by the lifting force of the knob and the leading end of a screw 16 projects from the side face of the knob 6 and abuts on a body 1, thereby keeping the knob 6 locked at all times. to operate, the user presses the knob 8 with this thumb and the stopper rotates reverse to retract the leading end of the screw, thereby the operating knob is unlocked.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a micrometer that measures dimensions such as the length and thickness of an object by moving and displacing a spindle.

Conventionally, various types of micrometers have been developed, but the most common ones are
Female thread on defined inner sleeve! This is a so-called screw micrometer, which is machined with high precision, and the male thread of a spindle, which is also machined with high precision, is screwed onto this female thread, and the simple spindle, which is integrally set at KL, is rotated to measure the object. Yes. This screw micrometer has an internal mechanism including the screw that is almost sealed, making it extremely dust-proof, and the self-zero function of the screw allows the spindle to rotate freely even if a certain person removes it from a simple device. It has the advantage of not having any sharp edges and ensuring that the object to be measured is clamped.6 On the other hand, the thread pitch is generally K.
During rounding, which is as small as 015■, when setting the zero point, or when clamping the object to be measured, the amount of screw penetration, or in other words, the screwing position of the screw, changes depending on the amount of simple operation force, and the measurement accuracy becomes stable. Therefore, it has the disadvantage that measurement requires skill. In addition, as mentioned above, the thread pitch is very fine, making it impossible to move the spindle at high speed.
The IK repeat measurement work efficiency is low, and the measurement work is complicated because it is necessary to read the wave source on the inner sleeve, the outer sleeve, and the simply engraved 9 scale and vernier. Furthermore, as mentioned above, not only is high-speed operation not possible, but the spindle *Im
Since it is threaded, the spindle will rotate during the measurement operation, and when measuring highly flexible materials such as soft plastic plates, it may cause wrinkles on such fixed objects. Because of this, it is not suitable for measuring such materials, and since it moves in the axial direction of the spindle while rotating during the measurement operation, it is not suitable as a micrometer structure that can be operated with one hand. Another drawback is that it is expensive because high-precision finishing is required for thread machining and scale machining.

By the way, in a micrometer with a table-like structure,
EmeKF! attempts to obtain high speed by coarsening the thread pitch formed on the inner sleeve and spindle, while maintaining the same level of accuracy as before! , the thread pitch must be made coarser and the scale carved on the circumference 1rK of the simple one must be made finer. For example, the thread pitch of a conventional common thread is α5-, and in order to read α01■ from this K, the simple horse face must be made finer. The graduation line 50II created in
Since you can't get the same accuracy unless you do 0%,
Speeding up was not possible.

Based on such a screw micrometer, various modifications have been made to provide various functions.

A typical example is the screw feed type 11 spindle Y.
There is known a screw-type electric advance meter that moves straight without turning. This linear micrometer has a spindle with a 9-piece joint body on the outer periphery that is rotatable and cannot be slid in the axial direction.2. ``Since the structure is such that a precision screw carved on the outer periphery of the intermediate cylinder is screwed into the screw of the inner sleeve, the straightness is improved compared to the general screw mike meter mentioned above, but other disadvantages are not improved. , Moreover, if you have to assemble and adjust the intermediate cylinder between the spindle and the inner sleeve in parallel and in the same window, it will be difficult to assemble and adjust it.
h5 New production problems have arisen.

In addition, for the purpose of high-speed operation, a reciprocating knob installed directly on the spindle is reciprocated along the surface of the main body frame, and one main body frame K11 is rotatably supported on a rack created on the spindle. A linear micrometer has been proposed that can be moved at high speeds by meshing the pins of the double-turn knobs and rotating the double-turn knob. 2 Such a linear micrometer has the advantages of high speed and non-rotatable spindle. However, with conventional linear micrometers, if you release your hand while holding an object to be measured, the spindle will naturally move away from the object to be measured, so a separate position holding system is required to prevent the spindle from escaping. It becomes necessary to provide a device, a so-called locking device, and in connection with this, a constant pressure device must be provided because it is difficult to hold the device in place, and a means for releasing the locking device must also be added. It had to be strange. Furthermore, the reciprocating knob method requires a separate knob for repeated measurements, and requires a large operating force because it must be performed against the spring force of the constant pressure device. From such a thing,
Overall, the t5 had drawbacks of poor operability and a complicated structure.

As mentioned above, conventional straight micrometers manufactured primarily for measuring thin objects and for high-speed operability have had difficulties in adjusting the knob during measurement.

The purpose of the present invention is to provide a micrometer that is easy to operate at high speed and lock or open.

The present invention provides a lock knob for operating a locking mechanism on an operating knob for moving a spindle forward and backward, so that the lock knob can be operated when the operating knob is operated, and the locking operation or release operation is categorized. This is what we are trying to achieve.

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

In FIG. 111, one end of the main body frame 1 is formed into a U-shape, and an anvil 2 is fixed to the inner surface of one end of the U-shaped portion 1A on the opening side. The other end of the main body frame 10 is linearly extended outward from the other end of the opening side of the U-shaped portion 1A, and the spindle 3 is slidably pushed through this linear portion 1B. There is. At one end of this spindle 3, a carbide tip 4 that can make four contact with Mori and Anobil 2 is fixed integrally, and the intermediate circumferential surface is precisely machined over a predetermined range in the axial direction to create a nine-rack 3A. . This rack 3AK is engaged with a pinion 5, and an operating knob 6 whose outer circumference has been machined with a km diameter is engaged with the binion 5. The operation knob 6 is rotatably supported on the main body frame IFc by a support pin T, and a half-moon-shaped lock knob 8 is attached to a part of its outer periphery.

On the other hand, a dial gauge 9 serving as a BK display device is provided in the linear portion l near the U-shaped portion 1A of the main body frame 1, and the pointer 10 of the dial gauge 9 is connected to the spindle 3 by a pinion (not shown). Suiyo K linked with
i! 1 has been written.

2 and 3 show details of the mounting structure of the operating knob 6 and the handle knob 3. In Fig. 2.3 of Nire et al., a drive rack 11 is fixed to the lock knob 8, and the drive rack 11 is used as a guide to move the operating knob 60 in the fast diameter direction so that the lock knob 8 can be moved in and out. An elastic part #12 made of a compression coil spring or the like is interposed between the operation knob 6 and the drive rack 11, and the lock knob 8 is always urged in the direction of pushing outward.

A pinion stopper 13 is embedded within the operation knob 6 in the same axis direction as the support pin 7.
A binion section 14 is formed near the center of the drive rack 11, and is fitted with the drive rack 11. Further, the -fiKa guide IH5 of the 1-binion stopper 13 has a threaded portion 16 formed at its other end, and is engaged with the guide portion and threaded portion on the operation knob 6 side, respectively. At this time, the threaded portion 16 is
When the drive rack 11 is raised, the pinion portion 14 is rotated and the tip of the screw s16 is threaded in a direction protruding from the side surface of the operation knob 6.

a four-way knob 8 incorporated in the operation knob 8;
Drive rack 11, elastic member 12J binion stopper? 3
In addition, as shown in FIG. 2, the operation knob 60 side m, on which the locking mechanism IT is constructed, has pipes on both sides guided to the main body frame 1 without any gaps, and a pinion. Stopper 13 is drive rack IIK
When the threaded part 16 of the operating knob 6 is rotated, the threaded part 16 is rotated so as to protrude from the side surface of the operating knob 6. The operating knob 6 is so constructed that its tip is always in contact with the inner surface of the side wall of the main body frame 1 so that the operating knob 6 is turned on.

Next, let's talk about how to use this example')! explain.

Grasp the linear portion 1B of the main body frame 1 with the palm and four fingers other than the thumb, and hook the pads of the fingers onto the lock knob 8 provided on the operation knob 6. The lock knob 8 is normally protruded outward by an elastic member 12, and the p1 pinion stopper 13 protrudes from the side surface of the operation knob 6 and is in contact with the main body frame 1. In this case, the operation knob 6 is in the p-lock state. When the lock knob 8 is pressed against the pressing force of the elastic member 12 from this state, the drive rack 11 moves toward the center of the bin T. K.

Binion stopper 13 engaged with drive rack IIK
As a result, the operating knob 6 also protrudes and pulls the tip of the threaded portion 16 that was in contact with the main body frame IKm. In this case, the operation knob 6 and thus the spindle 3 can be released.

Next, when the operating knob 6 is rotated in a predetermined direction, @ rotation is transmitted to the pinion 5, and the spindle 3 is moved in a direction away from the anvil 2 via the rack 3A meshed with the pinion 5. Next, anvil 2 and spindle 3
After placing the object to be measured between the carbide tip 4 attached to the tip of the tip, the operating knob 6 is then rotated in the opposite direction.

Due to the fins, the spindle 3 approaches the anvil 2, collides with it, and comes into contact with the object to be measured. At this time, when you release your thumb from the lock knob 8 while controlling the rotating force of the operating knob 60 so that the contact pressure is always constant, the operating knob 60 is locked by the action K of the locking mechanism 17 described above, and the spindle 3 is locked.
is also fixed.

That is, the lock mechanism 17U operates as follows.

When the thumb leaves the lock knob 8, the force of the elastic member 120 causes the dynamic drive rack 11 to protrude outward.
) The lock knob 8 attached is also moved upward in the figure. With the movement of the drive rack 11, the pinion stopper 13 engaged with the drive rack IIK is rotated, and its tip protrudes from the side surface of the operation knob 6 through the threaded portion 16#c formed at the tip. When the tip of the binion stopper 13 protrudes from the side surface of the operating knob 6, it comes into contact with the main body case IKfi, and restricts rotation of the operating knob 60.

If the dial gauge 9 is read in this state, the measurement is completed. When reading the dial gauge 9, it is sufficient to use the dial gauge 11 held between the tubes to be measured, and the indicated value does not change even if the dial gauge 9 is removed from the micrometer.

When the measurement of one object to be measured is completed, press the μ-tsukuknob 8t again in the same manner as described above, rotate the operation knob 6 to open the spindle 3, and place the next object to be measured between the anvil 2 and the spindle 3. do. Thereafter, by repeating the above-described operations, psw determination is sequentially and quickly performed.

As described above, this embodiment has the following effects: The combination of the two hooks 3A formed on the spindle 3, the pinion 5, and the operation knob 6 allows the spindle 3 to move forward and backward quickly. In addition, the four-wheel mechanism 17 can always be used stably and with high accuracy without requiring any skill. In addition, this locking mechanism 1T does not require two-handed operation like conventional methods, and can be operated with one hand by moving the spindle 3 to adjust the contact pressure to the object to be measured and locking in that state, making it very easy to operate. Sex eats me. nine,
Since a constant pressure can be applied to the operating knob 6 with a finger, a special constant pressure device is not required.

In this embodiment, the locking mechanism 17 is activated when the user releases the locking knob 8 of the operating knob 6 while driving. The thread direction of the tip threaded portion 16 can also be reverse threaded. In this case, it is not necessary to hold down the lock knob 8 when rotating the operation knob 6, so the operability of moving the spindle 3 is improved.

In addition, as shown in FIG.
Although the outer periphery of the binion 5 is machined with gears, a separate gear is provided on the side where the binion stopper 13 does not protrude.
It may be meshed with the In this case, the outer circumference KW of the operation knob 6
- It is possible to perform ret processing, etc., and the operability is further improved.

Furthermore, in this embodiment, the operation knob 6 is rotated to
The system spindle 3 is moved forward and backward in six ways by the meshing action of the rack 3A provided on the outer periphery of the spindle 3. The present invention can also be applied to a linear micrometer that slides along the section IBK. In other words, if the part that connects the operating knob and spindle 3 is made a little wider and the binion stopper and drive rack are built into that part, and the tip of the drive rack is made to protrude into the operating knob table 11 to form a set knob, a straight-advance type slide lid can be created. Even if a micrometer K is used, the same effect as in this example can be achieved. ・Sac = 1K ・Dial gauge Kfl is used as a display device.
Instead, other configurations such as mechanical or electrical digital counter bottles may be used.

The Zero-Hatsu W14 has the effect of providing a micrometer that is easy to operate at high speed and that can be easily locked with one hand.

Claims (1)

[Claims] (1) A spindle that is provided to be movable in the axial direction with respect to the main body frame, an operation knob that is rotatably supported by the main body 7 and moves the spindle forward and backward, and that prevents free movement of the spindle. a locking mechanism;
The micrometer is provided with a lock knob for operating and releasing the lock mechanism, and the four knobs are attached to the operation knob. (j) 411 The micrometer according to claim 1, characterized in that the lock mechanism is configured to be released when the lock knob is pressed against the operation knob. (I) In Claim 1 or 112, the locking mechanism is provided on a part of the circumference of the operation knob so as to be able to move in and out in the radial direction, and the locking mechanism is provided in the center in the radial direction by means of a spring. A drive rack that is biased in the direction of A micrometer comprising a pinion stopper that blocks or releases free movement.