JPS61209310A - Height gauge - Google Patents

Abstract

PURPOSE:To secure safety and to attain to enhance working efficiency, by stopping a slider at a moment when a measuring element was contacted with an article to be measured or at a time when pressure applied to the measuring element reached predetermined value and at a time when the slider reached the upper and lower limits of a supporting pillar. CONSTITUTION:At first, a change-over knob is pushed in and an engaging groove is engaged with a spring. Whereupon, the pinion fixed to a drive shaft is tumbled along a rack 7 and, therefore, a slider 8 rises and falls along a pillar 4. When a measuring element 38 is contacted with an article W to be measured and further moves by a distance corresponding to the radius of a spherical part, a touch signal is outputted to a control circuit from a touch signal probe 36. Whereupon, the control circuit stops a motor 21 and, at the same time, the moving amount of the slider 8 detected by an encoder is held. Thereafter, when the motor 21 is again started by the operation of a joy stick 104, the control circuit releases the measured value held by a digital display device 11. When the slider 8 successively reaches the upper or lower limit of the pillar 8 on the way of measurement, the motor 21 is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a height gauge, and is particularly applicable to automatically driving a slider.

[Background Art and Problems] Conventionally, as means for raising and lowering a height gauge slider along a support, there is a manual slide type in which the slider is directly gripped, and a rack engraved in the support without directly gripping the slider. It can be roughly divided into two types: the handle drive type, in which the pinion that meshes with the handle is rotated by operating the handle.

The former manual slide type has the problem that fine adjustment is difficult and the slider falls in a free state. In this point,
The latter handle-driven type has the advantage of allowing fine adjustment and being able to stand still at the current position without the need for special stoppers or balance weights.

However, even with the handle-driven type, the labor required for vertical movement is considerable, and there is a problem that work efficiency is extremely poor, especially in the case of a long height gauge.

[Object of the Invention] An object of the present invention is to provide a light gauge that solves these problems and improves work efficiency while ensuring safety.

[Means and actions to solve the problem] For this reason,
The present invention can be used automatically if the slider can be stopped at the moment when the gauge head etc. contacts the object to be measured, when the pressure applied to the gauge head etc. reaches a predetermined pressure, and when the slider reaches the upper and lower limit positions of the column. We focused on the fact that it is possible to drive the system, and furthermore, if the measured value can be read at the moment of contact or at a predetermined pressure, it will free us from the simultaneous operation of driving and reading, and we can achieve the effectiveness of automatic driving. This model introduces automatic driving.

That is, a column that stands on a base and has a notch near the upper and lower ends, a slider that is mounted so that it can move up and down along this column, and an encoder that detects the amount of relative displacement between this slider and the column. a digital display that digitally displays a measured value based on the output from the encoder; a switch that is attached to the slider in contact with the support column and is operated by the notch; and a slider that is engaged with the slider and the support support. The device includes a drive device for automatically raising and lowering the probe along the support, and a measuring tip that is tiltable in the longitudinal direction of the supporting column, and the measuring device generates a touch signal when the measuring tip comes into contact with the object to be measured. A detection device provided on the slider stops the driving device based on a touch signal emitted by the detection device, and holds the measured value displayed on the digital display as it is, while based on a detection signal from the switch. The present invention is characterized by comprising a control circuit that stops the drive device.

[Embodiment] FIG. 1 is a perspective view of the entirety of this embodiment, FIG. 2 is a front view of the height gauge body, FIG. 3 is a side view thereof, and FIG. 4 is a rear view thereof.

In these figures, the base 1 has a connector 3A connected to the AC adapter 2 on its side and a connector 3A connected to the cord 106 from the digital stick 104.
B are provided respectively, and a support 4 is vertically erected on the upper surface. The support column 4 is composed of a pair of rod-shaped members 4A and 4B having a circular cross section and which are connected to each other by a connecting member 5 at their upper ends and are arranged parallel to each other at a predetermined interval. One rod-shaped member 4A is provided with a scale 6 along the longitudinal direction of its inner surface. The other rod-shaped member 4B has a groove 7 along the longitudinal direction of its inner surface.
is provided, as well as a notch near the upper and lower ends, fi9
A and 9B are formed.

A slider 8 is mounted between the two members 4A and 4B so as to be movable up and down.

On the front of the slider 8, in addition to a digital display 11 that digitally displays the amount of relative displacement between the slider 8 and the column 4, that is, the height position of the slider 8, there is also a power switch 12).
Preset digit designation switch 13, this digit designation switch 1
O to the display digit of the digital display 11 specified by 3.
A preset number switch 14, a hold switch 15, and a zero set switch 16 are provided for sequentially presetting numerical values from 9 to 9.

Further, inside the slider 8, the other rod-shaped member 4B is provided.
The notch 9A is in sliding contact with the outer peripheral surface of the notch 9A.

An upper/lower limit detection switch 10 operated by a switch 9B is provided. Here, the positions of the notches 9A and 9B are predetermined so that the upper and lower limit detection switches 10 are turned on before the slider 8 moves up and down along the support 4 and collides with the connecting member 5 or the base 1. Furthermore, a motor 21 capable of forward and reverse rotation is fixed to one side of the slider 8, and an L-shaped support arm 32 is fixed to the other side of the slider 8 via a fixing member 31.

A prismatic slider 34 is attached to the horizontal portion of the support arm 32 via the clamp frame 33, and the rod-shaped members 4A, 4
B are provided so that they can move forward and backward in directions parallel to each other and perpendicular to them, and can be fixed. A touch signal probe 36 as a detection device is attached to the tip of the slider 34 via a clamp mechanism 35 so that its posture can be changed in the vertical direction. The touch signal probe 36 has a measuring element 38 that can be tilted in the longitudinal direction of the support column 4 using the base end 37 as a fulcrum, that is, can be rotated in the vertical direction.
It is configured to emit a touch signal when the first constantor 38 is rotated by a predetermined angle due to contact with the object W to be measured. Here, a touch signal is output when there is an angular displacement corresponding to the radius of the spherical tip of the probe 38.

The output signal from the touch signal probe 36 is as follows.

The signal is sent through a lead wire 39 to a control circuit 1.01 (see FIG. 8) provided inside the slider 8.

As shown in FIG. 5, within the slider 8, a drive shaft 41 is rotatably supported between and perpendicular to the pair of rod-shaped members 4A and 4B. Drive shaft 41
A pinion 42 that engages with the rack 7 formed on the rod-shaped member 4B is attached to a portion located inside the slider 8, and a boo 943 and a handle 44 are attached to a portion protruding toward the back side of the slider 8. are rotatable and mounted at regular intervals. Pulley 4
3 and a pulley 45 attached to the output shaft of the motor 2.
A belt 46 is passed around between the two. In addition, disc-shaped gears 47 and 48 are integrally formed on opposing surfaces of the pulley 43 and the handle 44, respectively, and the pulley 43
A clutch body 49 is attached to the drive shaft 41 between the handle 44 and the handle 44.
is provided so as to be rotatable in synchronization with the drive shaft 41 and displaceable in the axial direction by a switching means 50.

Disc-shaped gears 51 and 52 are integrally formed on the outer periphery of both end faces of the clutch body 49, respectively, and correspond to the disc-shaped gear 47 of the pulley 43 and the disc-shaped gear 48 of the handle 44, respectively. As a result, when the disc-shaped gear 52 of the clutch body 49 is meshed with the disc-shaped gear 48 of the handle 44, the rotation of the handle 44 is limited to the disc-shaped gear 48, 52 of the clutch body 49.
While the clutch body 49 moves to the left in FIG. 5 and the disc-shaped gear 51 meshes with the disc-shaped gear 47 of the pulley 43, the motor 21 is transmitted to the drive shaft 41 via the pulley 45, belt 46, pulley 43, disk gear 47, 51, and clutch body 49. When the drive shaft 41 rotates, the pinion 42 that meshes with the rack 7 rotates, so that the slider 8 moves up and down along the column 4. Here, the joystick 104 and the motor 21
and pulley 45.43. Belt 46. clutch body 49,
The drive shaft 41 and the transmission mechanism including the pinion 42 constitute the drive device 55 of this embodiment.

The switching means 50 also includes a bearing member 62 that is screwed into the open end of a hollow portion 61 formed along the axial direction at the center of the drive shaft 41 from the outer end surface side of the handle 44, and A movable shaft 64 is inserted into the center of the movable shaft 62 so as to be slidable in the axial direction, and has a movable element 63 at the front end that is slidable in the axial direction inside the hollow portion 6↓, and a movable shaft 64 at the rear end of the movable shaft 64. The bearing member 62 is fixed via a screw 65 and
and a pair of grooves 67 inserted from the outer circumferential surface of the clutch body 49 toward the center and formed along the axial direction in the drive shaft 41 to pass through the movable It is composed of a pair of pins 68 that connect the child 63 and the clutch body 49 to each other. As shown in FIG. 6, the pin 68 is formed in the shape of a round bar with a diameter smaller than the width of the groove 67. Further, the pin 68 and the clutch body 49 are connected to each other with the pin 68 being freely inserted in the radial direction of the clutch body 49.

Therefore, the clutch body 49 has a gap between the groove width of the groove 67 and the outer diameter of the pin 68, and the clearance between the clutch body 49 and the pin 68.
Since it can be rotated with respect to the drive shaft 41 by the clearance with 8, the meshing of the disc-shaped gears 47 and 51 or the meshing of the disc-shaped gears 48 and 52 can be performed smoothly and reliably. ing.

Further, a positioning means 71 is provided between the bearing member 62 and the movable shaft 64 for selectively locking the switching knob 66, that is, the movable shaft 64 in one of two positions in the axial direction of the drive shaft 41. The zero positioning means 71 is
As shown in FIG. 7, a U-shaped spring 73 is inserted so that at least two sides are located in the hole into which the movable shaft 64 is inserted into the holding groove 72 formed in the radial direction of the grave bearing member 62.
and a pair of V-shaped locking grooves 74 formed at predetermined axially spaced positions of the movable shaft 64 and selectively locked to the spring 73. As a result, when the front locking groove 74 is locked with the spring 73, the disc-shaped gear 52 of the clutch body 49 is locked with the disc-shaped gear 4 of the handle 44.
8, when the rear locking groove 74 is locked with the spring 73, the disc-shaped gear 51 of the clutch body 49 is meshed with the disc-shaped gear 47 of the pulley 43, respectively.

Further, a recess 81 is formed in the outer end surface of the handle 44, and a bearing member 82 is screwed into the recess 81. A slide shaft 84 is inserted into the center of the bearing member 82 so as to be slidable in the same direction as the drive shaft 41, which passes through the handle 44 and is always urged leftward in FIG. 5 by a spring 83. A small gear 87 that selectively meshes with a large gear 86 fixed to the slider 8 via a holding member 85 is fixed to the front end of the slide shaft 84, and a small gear 87 that selectively meshes with a large gear 86 is fixed to the rear end of the slide shaft 84. Slight rotation knob 8 fitted on
8 is fixed. A positioning mechanism 89 is provided between the inner circumferential surface of the fine rotation knob 88 and the outer circumferential surface of the bearing member 82 to hold the slide shaft 84 at two positions in the axial direction.

The positioning mechanism 89 is housed in a holding hole 90 formed radially toward the outer circumference of the bearing member 82 and is fitted with a spring 91.
a ball 92 that is always biased in a protruding direction; and a locking groove 93 that is formed at a predetermined axial distance on the inner peripheral surface of the fine rotation knob 88 and selectively engages the ball 92. It consists of An elastic member 94 such as sponge or rubber is attached in an annular manner along the outer periphery of the inner surface of the large gear 86 to provide a certain resistance to the small gear 87 . Thereby, even if the drive shaft 41 rotates due to the power from the motor 21, the handle 44 remains stationary without rotating.

Further, the touch signal from the touch signal probe 36 is applied to the control circuit 101 together with the detection signal from the upper and lower limit detection switch IO that detects the upper and lower limit positions of the slider 8, as shown in FIG. ing.

The control circuit i01 is.

After predetermined processing of the output of the encoder 102 which reads the amount of relative displacement between the support 4 and the slider 8, that is, the amount of movement of the slider 8 from the scale 6 formed on the rod-shaped member 4A, the output is displayed on the digital display ll. . at the same time,
When a detection signal from the upper/lower limit detection switch 1O or a touch signal from the touch signal probe 36 is given, a stop command is given to the motor drive circuit 103 that drives the motor 21, and the motor 21 is stopped via the motor drive circuit 103. When the touch signal is detected, the measured value displayed on the digital display 11 is held as it is. Furthermore, when the touch signal from the touch signal probe 36 disappears due to restart of the motor 21, the hold is released.

A joystick 104 for rotating the motor 21 in forward and reverse directions is connected to the motor drive circuit 103 .

The joystick 104 has characteristics that differ depending on the direction in which the operating stick 105 is tilted. For example, if the slider 8 rises when the motor 21 rotates in the forward direction and descends when the motor 21 rotates in the reverse direction, the operating stick 105 rotates the motor 21 in the opposite direction.
Operation stick 1 that rotates the motor 21 in a more positive direction than when it is tilted.
The rotational speed of the motor 21 is set to be higher in the tilting direction 05. Note that a DC voltage converted by the AC adapter 2 connected to the connector 3A is supplied to each of these circuits through a spiral flexible cord 110 between the base 1 and the slider 8. .

Next, the operation of this embodiment will be explained. First, switch knob 6
6 to the left in FIG. 5 to lock the locking groove 74 at the rear of the movable shaft 64 with the spring 73. Then, as the movable shaft 64 moves, the clutch body 49 moves to the left in FIG. Here, if the motor 21 is driven by operating the electric stick 104.

The rotation of the output shaft of the motor 21 is transmitted to the drive shaft 41 via the pulley 45° belt 46, the pulley 431, the disc gear 47, 51, and the clutch body 49. As a result,
Since the pinion 42 fixed to the drive shaft 41 rolls along the rack 7 formed on the rod-shaped member 4B, the slider 8
is moved up and down along the pillar 4. Therefore, slider 8
can be raised and lowered quickly and easily.

At this time, due to the rotation of the drive shaft 41, the drive shaft 41
The handle 44 rotatably supported by the handle 44 also tries to rotate in the same direction, but the slide shaft 84 passing through the handle 44
Since the small gear 87 is held stationary by the elastic member 94, the handle 44 does not rotate.

As the slider 8 moves up and down, the probe 38 of the touch signal probe 36 comes into contact with the object W to be measured, and when the probe 38 further moves by the radius of the spherical portion of the probe 38, a touch signal is output from the touch signal probe 36 to the control circuit IO1. . Then, the control circuit 101 gives a stop command to the motor drive circuit 103 to stop the motor 21 via the motor drive circuit 103, and at the same time outputs the measured value displayed on the digital display 11, that is, detected by the encoder 102. The amount of movement of the slider 8 thus determined is held. Therefore, when the probe 38 of the touch signal probe 36 comes into contact with the object W to be measured, the drive of the motor 21 is stopped, so the measurer is concerned about damage to the equipment due to overrun after the contact. There is no need to handle it carefully, although there may be some overrun after contact, but the contact point 3 of the touch signal probe 36
8 has a structure that allows this, so there is no problem with damage to the equipment after contact.At the same time, the measured value at that time is held, so the operator can avoid simultaneous drive and reading operations. can be released. Furthermore, since this measured value is a value in which an error corresponding to the radius of the spherical tip of the measuring element 38 has been corrected, there is no error due to the measurement direction.

Thereafter, when the motor 21 is restarted via the motor drive circuit 103 by operating the dial stick 104, when the probe 38 of the touch signal probe 36 is separated from the object W to be measured, the signal from the touch signal probe 36 is No touch signal. Then, the control circuit 101 displays the digital display 1.
Release the measured value held at 1. Therefore, it does not interfere with the next measurement.

In this manner, when the slider 8 reaches the upper limit position or the lower limit position of the support 4 while sequentially performing measurements, the upper and lower limit detection switches 10 are turned on by the notches 9A and 9B of the rod-shaped member 4B. As a result, a detection signal from the upper and lower limit detection switch 10 is provided to the control circuit 101. Then, like the touch signal from the touch signal probe 36, the motor 21 is stopped via the motor drive circuit 103, so that safe work can be performed without the problem of damage to the device.

On the other hand, when the switching knob 66 is moved to the right in FIG. 5 and the locking groove 74 in front of the movable shaft 64 is locked with the spring 73,
The disc-shaped gear 52 of the clutch body 49 is brought into mesh with the disc-shaped gear 148 of the handle 44 . In this state, even if the rotation from the motor 21 is transmitted to the pulley 43, the rotation of the pulley 43 is not transmitted to the clutch body 49, so the drive shaft 41 is not driven by the rotation from the motor 21. In this state, the handle 44
Since the rotation of the slider 8 is transmitted to the drive shaft 41 via the disc-shaped gears 48, 52 and the clutch body 49, the slider 8 can be moved up and down along the column 4 by rotating the handle 44. Therefore, by switching the switching means 50, the raising and lowering of the slider 8 can be switched from automatic to manual and from manual to automatic.

At this time, if the positioning mechanism 89 is switched and the small gear 87 is engaged with the large gear 86, and the slight rotation knob 88 is rotated, the small gear 87 will rotate along the large gear 86.
The handle 44 can be rotated slightly. In other words, the slider 8 can be moved up and down little by little along the column 4.

Therefore, according to this embodiment, since the slider 8 is automatically raised and lowered by the motor 21, the slider 8
It is possible to reduce the labor required to move up and down the robot, and to expect quick measurement work.

Further, when the contact point 38 of the touch signal probe 36 comes into contact with the object W to be measured due to the vertical movement of the slider 8, the motor 2 is activated based on the touch signal emitted from the touch signal probe 36.
1 is stopped, so the measurer does not have to handle the device carefully for fear of damage due to overrun after contact. At the same time, the measured value displayed on the digital display 11 Since I made it hold,
The measurer can be freed from the simultaneous work of driving and reading operations, and quick and accurate measurements can be performed.

Furthermore, even when the slider 8 reaches the upper and lower limit positions of the support column 4, the motor 21 is stopped based on the detection signal from the upper and lower limit detection switch 7 10, so that work can be done safely without damaging the equipment. In particular, the upper and lower limit detection switch 10
is housed in the slider 8 and a notch 9A is used to operate the slider 8.
, 9B are provided on the support column 4 side, so that the slider 2,000 lO does not protrude to the outside, ensuring safety in handling, and the upper and lower limit positions of the slider 8 can be detected with a single switch. Furthermore, since the positions of the notches 9A and 9B are determined so that the upper and lower limit detection switches 10 are activated before the slider 8 collides with the members at the upper and lower ends, even if the slider 8 goes up and down at an excessive speed, it will not be caused by a collision. Damage to equipment can be prevented.

Furthermore, since the hold is released when the remoter 21 is restarted by a command from the gigoistick 104, the next measurement will not be hindered.

Furthermore, even when the slider 8 moves upward and downward, the touch signal is emitted when the contact point 38 of the touch signal probe 36 is rotated by the radius of the spherical tip, that is, it is always on the neutral axis of the contact point 3B. Since a touch signal is emitted, it is possible to operate without changing the drive control system, without data correction, and without changing the configuration for L downward movement.

On the other hand, since the rotation of the pulley 43 and the rotation of the handle 44 to which the rotation of the motor 21 is transmitted are selectively transmitted to the drive shaft 41 via the clutch body 49 that selectively engages with them, the clutch body By switching 49, it is possible to switch from automatic to manual and from manual to automatic.

Moreover, this switching is extremely simple since it is only necessary to switch the switching knob 66 to two positions in the axial direction. Furthermore, since the positioning means 71 that holds the movable shaft 64 in two positions is provided, each mesh will not become disengaged.Furthermore, since the clutch body 49 can be slightly rotated with respect to the drive shaft 41, the meshing can be switched. The mesh can be smoothly and reliably engaged even at times.

Further, by turning the slight rotation knob 88, the small gear 87 rotates along the large gear 86, that is, the handle 44 rotates slightly, so that the slider 8 can be raised and lowered little by little. Furthermore, when the small gear 87 is not meshed with the large gear 86, the elastic member 94 provides resistance to the small gear 87.

Even if the drive shaft 41 rotates, the handle 44 does not rotate.

In addition, in implementation, the encoder may be of any type, such as a photoelectric type, a capacitance type, or an electromagnetic type, as long as it can detect the amount of relative movement between the column 4 and the slider 8.

Further, the touch signal probe 36 may be configured to close a contact point by rotational displacement of the measuring point 38 when it comes into contact with the object W to be measured, thereby emitting a touch signal, or a measuring point. It may be configured such that when a predetermined pressure is applied to 38 due to contact with the object to be measured, the pressure is detected and a signal is generated.

Further, in the above embodiment, when the touch signal disappears,
Although the hold is released, for example, when there is an automatic feed operation signal for driving the motor 21, the hold may be released, or the hold may be reset manually.

Furthermore, in the above embodiment, one upper and lower limit detection switch 10
The upper and lower limit positions of the slider 8 are detected by the above method, but two limit switches are placed above and below the slider 8, so that the upper limit switch detects the upper limit position and the lower limit switch detects the lower limit position. In this way, by adjusting the positions of both limit switches in the vertical direction, the upper and lower limit stop positions of the slider 8 can be changed, and the effective stroke of the slider 8 can also be changed. .

[Effects of the Invention] As described above, according to the present invention, it is possible to provide a height gauge that improves work efficiency while ensuring safety.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is an overall perspective view, Fig. 2 is a front view, Fig. FIG. 6 is a diagram showing the relationship between the bottle and the groove, and FIG. 7 is a cross-sectional view showing the relationship between the bottle and the groove.
The line sectional view and FIG. 8 are block diagrams. l... Base, 4... Support, 7... Rack, 8...
・Slider, 9A, 9B... Notch, 10... Upper/lower limit detection switch, 11... Digital display, 21...
- Motor, 36... Touch signal probe as a detection device, 38... Measuring head, 42... Pinion, 55...
...Drive device, 101...Control circuit, 102...Encoder, 1o4...Joystick, 105...
・Operation stick.

Claims (3)

[Claims] (1) Detects the relative movement displacement between a column that stands on a base and has a circular cross section and has notches near the top and bottom ends, a slider that is mounted so that it can rise and fall along this column, and this slider and the column. a digital display for digitally displaying a measured value based on the output from the encoder; a switch attached to the slider in contact with the support and actuated by the notch; a drive device for automatically raising and lowering the engaged slider along the column; and a measuring element tiltable in the longitudinal direction of the column;
a detection device provided on the slider that emits a touch signal when the probe comes into contact with the object to be measured; and a detection device that stops the drive device based on the touch signal that the detection device emits, and displays the information on the digital display. a control circuit that stops the driving device based on a detection signal from the switch while holding the measured value as it is. (2) The height gauge according to claim 1, wherein the control circuit is configured to release the hold when the drive device is restarted. (3) In claim 1 or 2, the drive device includes a joystick whose characteristics differ depending on the direction in which the operation stick is tilted, and a motor that is rotated in relation to the tilting operation of the operation stick of the joystick. and a transmission mechanism that is rotatably supported by the slider and includes a pinion that engages with a rack carved in the support column and that transmits the rotation of the output shaft of the motor to the pinion. height gauge.