JPS5826336Y2 - automatic balancing instrument - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic balancing instrument using a position feedback means based on a new principle, and in particular to the structure of its movable part.

In explaining the present invention, an outline of an automatic balancing instrument using a new principle will first be explained with reference to FIG.

In the figure, 1 is a scale plate, and 2 is a guide rod arranged substantially parallel to the scale plate.

Reference numeral 3 denotes a movable part that moves along the guide rod, including a holding part 31 loosely fitted to the guide rod 2, a pen arm 32. Guidelines 33. Recording pen 3
4, and is connected to an excitation section 62, which will be described later.

41 is a reeling yarn fixed to the holding part 31, and the pulley 42°4
3 to a pulley 45 of a balanced motor 44.

5 is a recording paper fed out in the direction of the arrow.

6 is a position feedback means, 61 is a magnetostrictive wire made of magnetostrictive material,
It is arranged almost parallel to the guide rod 2.

The magnetostrictive wire 61 is fitted with an excitation section 62 made of a coil, for example, and moves along the magnetostrictive wire 61 in cooperation with the movable section 3 to cause the magnetostrictive wire 61 to generate an ultrasonic signal.

Reference numerals 63 and 64 indicate ultrasonic signal receiving sections disposed at both ends of the magnetostrictive wire 61, and these receiving sections include coils, piezoelectric elements, and the like.

In the automatic balancing instrument configured as described above, the excitation section 6
When an excitation pulse is applied to the magnetostrictive wire 61 , an ultrasonic signal is generated in the magnetostrictive wire 61 , which propagates to both ends of the magnetostrictive wire 610 and reaches the receiver 63 .
．． 64, a pulse-like voltage signal is generated in both receivers.

A signal E corresponding to the position of the movable part 3 is obtained by calculating this voltage signal.

This signal Ef is compared with the input signal E1, and a difference signal E between the two signals is applied to the balance motor 44 to rotate it, moving the movable part 3 to balance both the signals Ef and Ei.

The present invention relates to a movable part of an automatic balancing instrument based on a new principle as described above, and will be explained below with reference to the drawings.

FIG. 2 is a plan view of an embodiment of the present invention, FIG. 3 is a partially sectional front view thereof, and FIG. 4 is a side view thereof.

In the figure, reference numeral 3 denotes a movable part, and a holding part 4 and an excitation part case 5 are integrally molded with a plastic material, for example.

The holding part 4 consists of arms 41, 42 and a bracket 43, and the guide rod 2 is inserted into the arms 41, 42';
).

45 and pen arm 6 mounting hole 46 and mounting screw hole 47
is provided.

A pin 63 is provided on one arm 61 of the pen arm 6, and is fitted into the attachment hole 46 of the arm 41.

A hole 64 is bored in the other leg 62 of the pen arm, into which the tip of a screw 65 screwed into the mounting screw hole 47 of the arm 42 is inserted.

The pen arm 6 is configured to be rotatable around the tips of a pin 63 and a screw 65.

A pointer 67 and a recording pen (not shown) are attached to the pen arm 6, and the rotation of the pen arm 6 is controlled by the bracket 4.
3, and the pen pressure of the recording pen is regulated by a plate spring 43.

7 is a reeling yarn, which is fixed to the bracket 43 with screws 49.

This reeling yarn 7 is taken out through a slot 50 provided on one arm of the holding part 4, and a coil spring 71 that applies tension to the reeling yarn T is installed between the bracket 43 and the hole 50. connected.

If excessive tension is applied to the reel 7, the hole 50 in the arm 42 acts as a stopper to protect the servo system.

The excitation unit case 5 has a cylindrical shape with a bottom, and a hole 52 is provided at the bottom.

53 is an inner chamber, 54 is a cylindrical bobbin, a hole 55 of which is formed to have approximately the same diameter as a hole 52 provided at the bottom, and an excitation coil 56 is wound around the outer circumference of the bobbin.

The bobbin 54 is housed in the center of the inner chamber 53 by a spacer or the like, and the magnetostrictive wire 8 is inserted into the hole 52 at the bottom and the hole 55 in the bobbin.

Reference numeral 57 is an output transformer, which supplies power to the magnetostrictive wire 8 when the conductor that supplies power to the excitation coil 56 from the outside is removed, and outputs an output signal to the excitation coil 56 by the output of the transformer 57 coupled to the magnetostrictive wire 8. This is necessary when generating , but is not essential to the present invention.

Reference numeral 58 designates a rotation stopper provided below the excitation unit case 5, and 59 designates a protrusion for positioning the pen pressure regulating spring 68 provided on the side of the excitation unit case 5.

As mentioned above, the movable part of the present invention includes a guide rod 2° magnetostrictive wire 8
holes (44), 45, 52 and pen arm 6 for inserting
The movable part 3 slides in the axial direction along the guide rod 2 and the magnetostrictive wire 8, and the pin 63 of the open arm performs rotational movement within the hole 46. In order to ensure that these movements occur smoothly and to prevent wear, it is generally necessary to take measures such as providing bearings.

However, if the movable part 3 is molded, for example, from a special self-lubricating plastic material (oil-impregnated plastic) or a special self-lubricating metal material, there is no need to provide bearings in the above-mentioned sliding parts and rotating parts.

Of course, if it is made of metal material, insulation treatment is required as necessary.

In the present invention, the holding part 4 of the movable part 3 and the excitation part case 5 are integrated, and the single member has the following multifunctions.

(1) Bearing of the guide rod (2) Guide of the magnetostrictive wire (3) Bearing of the pen arm (4) Case of the excitation part (5) Stopper of the coil spring for reeling (6) Stopper of the pen arm (7) Stopper (8) ) Positioning protrusion of spring for regulating pen pressure This invention relates to the movable part of an automatic balancing instrument based on a new principle, and although it is difficult to compare with conventional devices, it is compatible with the potentiometer type and bridge type, which are currently widely used. The movable parts of automatic balancing instruments are complex and are made up of many parts, but the present invention can perform the above multi-functions with a single member with a simple structure, and is also easy to manufacture. Since it is easy and has few failures, it is highly effective in practical use.

[Brief Description of the Drawings] Fig. 1 is a principle explanatory diagram of an automatic balancing instrument using the present invention, Fig. 2 is a plan view of an embodiment of the invention, Fig. 3 is a front view thereof, and Fig. 4 is a side view. It is a diagram. 2...Guide rod, 3...Movable part, 4...
...Holding part, 5: ...Excitation part case, 6...
...Pen arm, 7... Reeling thread, 8...
Magnetostrictive wire.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ A holding part consisting of an arm for attaching a pen arm, a hole into which a guide rod is fitted, a bracket for fixing reeling yarn, a chamber for accommodating an excitation part, and a hole into which a magnetostrictive wire is fitted. An automatic balancing instrument comprising a movable part integrally configured with an excitation part case. 2. The automatic balancing instrument according to item 1, wherein the movable part is molded from a special self-lubricating plastic material. 3. The automatic balancing instrument according to paragraph 1, wherein the excitation part case is provided with a rotation stopper. 4. The automatic balancing instrument according to item 1, wherein the excitation part case is provided with a positioning protrusion for a spring for regulating pen pressure. 5. The automatic balancing instrument according to item 1, wherein one end of a pen pressure regulating spring is attached to the pen arm. 6. The automatic balancing instrument according to item 1, wherein the bracket is provided with a stopper for the pen arm. 7. The automatic balancing instrument according to item 1, in which the pen arm and the box arm are used as a stopper for a coil spring connected to a reel. 8. A first chamber in which an excitation coil is housed in a chamber of an excitation unit case.
Automatic balancing instrument as described in section. 9. The automatic balancing instrument according to item 1, wherein an excitation coil and an output transformer are housed in a chamber of an excitation unit case. 2. The automatic balancing instrument according to claim 1, wherein a hole in a bobbin around which an excitation coil is wound is used as a guide for a magnetostrictive wire.