JPS63128201A - Tool dimension measuring instrument - Google Patents

Abstract

PURPOSE:To measure the dimension of a tool with high accuracy by closing a conductive circuit constituted of a contact and a tool to be measured, when the tool to be measured and the contact have been brought into contact with each other. CONSTITUTION:A contact 1, a contact holder 2 and a shaft 5 are constituted of a conductive body, therefore, a conductive path is formed between the contact 1 and a terminal 17. Also, an LED case 4, a holder body 3 and a metallic fixture 10 are also constituted of a conductive body, and a battery connecting terminal 19 comes into contact with the case 4, therefore, another conductive path is formed between the terminal 19 and the metallic fixture 10. Accordingly, an electric circuit of the contact 1 the holder 2 the terminal 17 an LED 16 a lead terminal 16a a terminal 18 a battery 20 the terminal 19 the case 4 the body 3 the metallic mixture 10 is formed. In this state, when a tool to be measured of the conductive body comes into contact with the contact 1, said electric circuit is closed and the LED 16 is turned on, and a contact of the tool and the contact is detected. By such a practical touch sensor, the tool dimension of the tool to bemeasured can be measured with high accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a tool dimension measuring device for measuring dimensions such as the diameter and length of a tool.

(Prior art) In numerically controlled (NC) machine tools, etc., the length and diameter of the tools used are measured and used. I try to do X.

When machining a workpiece with a tool, the dimensions of the tool are measured with high precision before use, and the tool length and tool diameter obtained by measurement are used as machining information when machining the workpiece with high precision. For example, the measured value is input to the NC control device as data of the tool used.

As described above, it is necessary to measure the tool length, etc. of the tool to be used, and this measurement is performed using a device for measuring tool dimensions, such as a tool presetter.

Conventionally, as this type of device, one using a touch sensor is described in Japanese Patent Laid-Open No. 108256/1983. This touch sensor emits a control signal when it comes into contact with the tool to be measured, and is installed on a fixed or movable support mechanism such as a stand.
This allows the contact position with the tool to be detected and the tool dimensions to be measured.

<Problems to be solved by the invention> However, in the matters described in the above gazette,
Although it has been disclosed that a touch sensor is used in the measuring head, it remains an idea without any concrete structure, and there is no practical touch sensor suitable for use in this type of tool dimension measuring device. The reality is that it has not been developed yet.

As mentioned above, when using a touch sensor in this type of device that accurately measures the dimensions of a tool, the touch sensor can be one that uses switches with a normal contact-type switch mechanism. However, it is not possible to satisfy the demand for measuring tool dimensions with high accuracy, and therefore, it is not possible to simply use a contact type sensor that obtains a signal from a previous contact as a touch sensor. be.

The present invention has been made in view of these points, and it is an object of the present invention to provide a tool dimension measuring device equipped with a touch sensor that is suitable and practical for measuring tool dimensions with high accuracy.

<Means for Solving the Problems> The tool dimension measuring device of the present invention is a device that measures the tool dimension of a tool to be measured using a touch sensor.

A contact made of a conductive material is slidably held in a contact holder, the contact holder is attached to a support main body, a circuit is configured including the contact and the tool to be measured as a conductive path, and this circuit is The device is characterized in that it includes a power supply section, and when the tool to be measured and the contactor come into contact, the circuit is closed, thereby detecting contact between the tool to be measured and the contactor. .

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

FIG. 1 is a side view of a measuring head in an embodiment of the present invention, FIG. 2 is a perspective view of the same external appearance, FIG. 3 is an exploded perspective view thereof, and FIG. FIG. 2 is an overall perspective view of the tool presetter.

The measurement unit head constitutes a touch sensor, and the first
As shown in FIGS. 3 to 3, the contact l
A holder for holding a contact (hereinafter referred to as a contact holder) 2 that slidably holds this contact 1, a holder 3 that supports this contact holder 2 (hereinafter referred to as a holder body) 3, In the illustrated case, the holder has an LED case 4 attached to the rear flat portion 3a of the main body 3.

The contact 1 has its tip 1a brought into contact with the tool to be measured, and is made of metal (electrical conductor).
A flange portion 1b is formed at the rear end, and a spring storage hole 1c is formed from the flange portion 1b side toward the tip side.

Contact holder 2 is made of metal. This contact holder 2 is provided with holes for holding the contact 1, including a hole 2a that penetrates to the tip end surface of the holder 2, and a hole 2b with a slightly larger diameter connected to this hole 2a. These holes 2a and 2b allow the contact holder 2 to
A stepped portion 2C is formed inside.

The contact 1 has a hole 2a in such a contact holder 2.
, 2b.

The contact l protrudes from the contact holder 2,
The protrusion is restricted by the engagement of the flange portion 1b of the contactor 1 with the stepped portion 2C of the contactor holder 2.

The contact holder 2 further has a shaft mounting hole 2d on the rear end side, and a screw hole 2e for attachment to the holder main body 3.
is formed. One end of the shaft 5 made of metal is attached to the shaft attachment hole 2d.

The contact holder 2 is attached to the holder main body 3 via an insulating plate 6 made of an insulator (Bakelite or the like).

The insulating plate 6 has a shaft insertion hole 6a and a screw attachment hole 6b at positions corresponding to the shaft attachment hole 2d and screw hole 2e of the contact holder 2, respectively (FIG. 3). The holder main body 3 is made of metal, and has a front mounting portion 3b.
and a rear flat part 3a, and its mounting part 3b.
Similarly to the case of the insulating plate 6, it also has a shaft through hole 3C and a screw mounting hole 3d, respectively (FIG. 3).

7) The through hole 3C is formed with a diameter larger than the thickness of the shaft 5 so as not to come into contact with the metal holder main body 3.

The contact holder 2 into which the contact 1 is inserted is attached to the holder body 3 via the insulating plate 6 with a spring 7 interposed between the spring storage hole 1c of the contact 1 and the insulating plate 6. I'm here.

The contact 1 is elastically projected by the biasing force of the spring 7 to a position where its flange lb is locked to the step 2C of the contact holder 2. Further, the contact holder 2 and the holder main body 3 are attached using screws 8, and the screws 8 are insulating plastic screws.

In this way, the contact holder 2, which slidably holds the contact 1, is attached in an insulated state from the holder main body 3.

On the other hand, as described above, the shaft 5 whose one end side is attached to the shaft mounting hole 2d of the contactor holder 2 and is electrically connected to the contactor 1 also passes through the shaft formed in the attachment part 3b of the holder main body 3. It passes through the hole 3C without touching the holder main body 3.

A mounting bracket lO is attached to the lower surface of the flat portion 3a of the holder main body 3 with screws 9.

Further, on the upper part of the flat part 3a of the holder main body 3, an LED is installed.
One piece of the case 4 is fixed together with the LED case lid 11. Screws 12 attach the LED case lid 11 to the LED case 4, and screws 13 (plastic screws in this example) integrally attach the LED case 4 and the LED case lid 11 to the holder main body 3.

The LED case 4 is made of metal and has four parts 4 for storage.
a, and a shaft through hole 4b is formed in communication with this recess 4a (FIG. 3). This shaft through hole 4b is provided at a position corresponding to the shaft through hole 3C on the side of the holder main body 3 described above, and similarly is formed to be larger than the thickness of the shaft 5.

The shaft 5 passes through the shaft through hole 3C and also passes through the shaft through hole 4b of the LED case 4 without contacting the LED case 4, and the other end of the shaft 5 passes through the four parts 4a inside the LED case 4. is coming.

Inside the recess 4a of the LED case 4, there is an insulating plate 14 made of an insulator (Bakelite, etc.), a battery case 15 similarly made of an insulator (Bakelite, etc.), an LED 16 as a display element, and an insulator for connecting the shaft. A terminal 17, terminals 18 and 19 for battery connection, and a battery (for example, a lead battery) 20 are housed.

The insulating plate 14 is placed on the bottom of the recess 4a of the LED case 4, and the battery case 15 is placed thereon via one terminal 18 for battery connection.

The battery case 15 has a storage hole 15a for storing batteries.
is formed, and a plate-like portion 15b is formed on one end side of the plate-like portion 15b.
An insertion hole 15c for a lead terminal of the LED 16 is formed in this plate-like portion 15b (FIG. 3).

A cutout 14a is formed in the insulating plate 14 corresponding to the position of the second insertion hole 15c, and a circular hole 4c is formed in the bottom of the LED case 4 below the cutout 14a. (Figure 3).

Each lead terminal 16a of the LED 16 is inserted into each insertion hole 15c of the battery case 15, one lead terminal 16a is connected to the terminal 18, and the other lead terminal 16a is connected to the terminal 17, respectively.

The terminal 17 to which the lead terminal 16a is connected is connected to the other end of the shaft 5 protruding from the shaft through hole 4b of the LED case 4, and the terminal 18 to which the lead terminal 16a is connected is connected to the other end of the shaft 5 of the battery case 15. Storage hole 15a
It is in contact with one electrode (minus side) surface of the lower battery of the two batteries 20 housed in the battery. A battery connection terminal 19 is in contact with the other electrode (positive side) surface of the housed upper battery 20 .

For installation of this terminal 19, please refer to the LED case ill.
This is done by the screws 13 so that the terminals 19 are held between the upper surface of the end portion of the LED case 4 and the upper surface of the end portion of the LED case 4. Therefore,
The terminal 19 and the metal LED case 4 are electrically connected,
Further, this is electrically connected to the holder main body 3 and the mounting bracket 10.

Further, an LED protrusion hole 11a is formed in the LED case lid 11 in correspondence with the position of the LED 16, and a portion of the LED 16 is exposed on the case L surface through this hole 11a. .

The measuring section head having such a configuration is attached to a support section that supports the measuring section head via the mounting fitting 10.

2. In the measurement unit head, a contact holder 2, a holder main body 3. The LED case 4 and the mounting bracket 10 each perform a predetermined function, such as holding the contact 1 in the case of the contact holder 2. It also serves as a conductive path to form a closed circuit.

First, the contact l, the contact holder 2 and the shirt 5 are as follows:
Since both are made of a conductor, a conductive path is formed between the contact 1 and the terminal 17 by the contact 1 and the like. In addition, the LED case 4, the holder main body 3, and the mounting bracket 1O are also made of conductive material, and the terminal 19 for connecting the battery is made of a conductive material.
Since the terminal 19 is in contact with the LED case 4, another conductive path is formed between the terminal 19 and the mounting bracket 10 by the LED case 4 and the like.

Therefore, in the measuring head, contact 1...contact holder 2...shaft 5...terminal 17...L
ED 16 and lead terminal 16a...terminal 18...
An electric circuit including a battery 20, a terminal 19, an LED case 4, a holder main body 3, and a mounting bracket 10 is formed.

The measurement unit head is attached to the support part of the measurement device via the mounting bracket 10. As for the path leading to the tool, if you assemble them in a state where they are electrically conductive, the tool to be measured is made of metal, which is also a conductor, so
A circuit is formed from the contactor 1 to the tool to be measured via the above-mentioned electric circuit of the measuring head and further via the conductive path on the device main body side.

In this way, by utilizing the fact that the tool to be measured is a conductor,
By configuring a circuit including the tool to be measured and the contact 1, when the tool to be measured and the contact 1 come into contact, the circuit is closed, the LEo 16 lights up, and the contact 1 Indicates that l has touched the tool to be measured.

In this way, contact between the tool to be measured and the contact l of the measuring head can be detected. Such a detection mechanism performs detection by closing a circuit that includes the tool to be measured and the contact itself as a conductive path when the tool to be measured and the contact are in contact, and uses a touch sensor to detect the It is suitable for a device for measuring tool dimensions of a measuring tool, can meet the demand for high precision measurement, and is also practical.

In the above configuration, when forming a closed circuit, the battery 20 serving as a power supply unit is built into the measurement unit head itself, which causes current to flow through a circuit that uses the tool to be measured and the contact 1 itself as conductive paths. Since it can be handled as a measurement head with a built-in power supply, there is no need to separately provide a power supply section for the above circuit in the device body, etc., and it is sufficient to install it as is when installing it on the device, so it is easy to handle. is simple and extremely effective, for example, it can be easily applied to tool dimension measuring devices that are not equipped with a power source.

Furthermore, an LED 16 as a display element is also built into the measuring head, and is turned on when the tool to be measured comes into contact with the contact l, so that a reading type tool as shown in Fig. 4 can be used. When used as the measurement head of a presetter, the LED 16 lights up to easily recognize that the two have touched, and the operator can
What is necessary is to read the value at the time when LEDl6 lights up.

In FIG. 4, which shows the case where it is applied to a tool presetter, the measuring head is used for measuring in the radial direction and for measuring in the axial direction, and is designated by reference numbers 100A and 100B, respectively. has been done.

This tool presetter as a tool dimension measuring device has a measuring section head 100A for the tool to be measured to be attached.
, 100B is moved to measure the tool diameter and tool length, and is equipped with a radial movement handle 101 and a height movement handle 102.

A stand 104 on the apparatus main body 103 is provided so as to be slidable in the horizontal direction in the figure, and a slide portion 105 is provided to be slidable in the vertical direction relative to the stand 104.

The stand 104 is moved by rotating the radially moving nodle 101, and the rad 100A is moved in the radial direction toward the measuring section. Also, when the height direction movement/percentage handle 102 is rotated,
The slide part 105 can be moved in the vertical direction,
This moves the measurement unit head 100B in the height direction.

In this way, the measurement unit heads 100A and 100B are
It is attached to the device main body 103 so as to be movable in the radial and height directions.

In the embodiment of the drawings, the slide portion 105. Stand 104
, the device main body section 103, and the measured tool mounting section 106 are made of metal, and are electrically connected to form a conductive path on the device main body side.
A circuit is formed from A and 100B to the tool to be measured.

When measuring the tool diameter or tool length of a tool to be measured, the operator operates a moving handle for that direction to move the measurement head toward the tool to be measured. In this process, when the tip 1a of the contact 1 of the measuring head is not in contact with the tool to be measured, the circuit consisting of the conductive path on the measuring head side and the conductive path on the device main body side is not opened. , so no current flows through that circuit, and therefore the LED
16 is off, but when the tip 1a of the contact 1 touches the tool to be measured, the circuit is closed, and the closed circuit with the tool to be measured and the contact 1 itself as a conductive path becomes energized. At the time of contact between the two, the LED 1 6 lights up. In this way, contact between the tool to be measured and the contactor 1 is detected, and one operator reads the position of the measuring head at that time and measures the tool dimensions.

The reading is performed using the radial movement handle 101 for the tool diameter.
This is done using the scale attached to the side, and the tool length is determined using the scale attached to the stand 104 side.

In the above description, a mechanism such as a slide section is used to create a conductive path on the device main body side from the measuring head to the tool to be measured. However, the present invention is not limited to this, and for example, Terminal 19 for battery connection of measurement head
This does not preclude a configuration in which a lead wire is connected to any location between the mounting fittings 10 and directly connected to the tool-to-be-measured mounting portion 106 or the like.

Furthermore, the present invention can of course be applied to other than the tool brisset sunset view shown in FIG. It is also possible to take out the contact position detection output to the outside and automatically measure the tool dimensions based on this output.

<Effects of the Invention> According to the present invention, it is possible to provide a tool dimension measuring device having a practical touch sensor that is suitable for a device that accurately measures tool dimensions of a tool to be measured.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a cross-sectional view of the measuring head, Fig. 2 is an external perspective view of the same, Fig. 3 is an exploded perspective view of the same, and Fig. 4 is a tool presetter. FIG. 2 is a perspective view of the external appearance when applied. l...Contact, 2...Contact holder, 3...Holder main body, 4...LED case, 5...Shaft, 10...Bracket 1, 16... LED, 17~
19...Terminal-120...Battery, 100A, 1
00B...Measuring unit head, 103...Device main body part,
104...stand, 105...slide part, 10
6...Tool to be measured mounting part.

Claims (5)

[Claims] (1) A device for measuring the tool dimensions of a tool to be measured using a touch sensor, in which a contact made of a conductor is slidably held in a contact holder, and the contact holder is attached to a support body. In addition, a circuit including the contact and the tool to be measured as a conductive path is constructed, and this circuit is provided with a power supply section, and the circuit is closed when the tool to be measured and the contact come into contact with each other. A tool dimension measuring device characterized by detecting contact between a measuring tool and a contactor. (2) The tool dimensions according to claim (1), wherein the circuit includes a display element, and the display element displays the contact between the tool to be measured and the contactor. measuring device. (3) Claims (1) or (2) characterized in that the power supply unit is incorporated into a measurement unit head that includes the contact, the contact holder, and the support body.
The tool dimension measuring device described in section. (4) The tool dimension measuring device according to claim (2), wherein the display element is incorporated into a measurement head that includes the contact, the contact holder, and the support body. . (5) The tool dimension measuring device according to claim 3 or 4, wherein both the power supply section and the display element are incorporated in the measurement section head. .