JP3333812B2 - Signal indicator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal indicator which measures a minute dimension and displays it with a pointer, and particularly incorporates an electric contact which opens and closes according to a displacement dimension of an object to be measured. About.

[0002]

2. Description of the Related Art As a conventional signal indicator of this type, there has been a signal indicator having a main structure as shown in FIGS. That is, in this signal indicator, the linear movement of the spindle 2 is
The ball-mounted sensitivity shaft 4a is transmitted to the first segment 4 attached to one end of the fixed L washer 4b via the rear seat 2b fixed thereto. The first segment 4 is rotatably supported by the first stem 6 rotatably held between the base plate 8 and the receiving plate 10 via a precious stone together with the L washer 4b via a precious stone. Are provided.

[0003] The tooth profile 4c of the first segment 4 is engaged with a second pinion 12a fixed to the sector-shaped second segment 12 and rotatably held between the base plate 8 and the receiving plate 10 via a precious stone. . A toothed portion 12b is provided at the tip of the second segment 12, and the toothed portion 12b is held between the upper seat 10a fixed to the receiving plate 10 and the base plate 8 via a precious stone, and is provided at the end. The third hook 14 is engaged with the pointer. A hairspring 16 is attached to the third kana 14 in a state of being caught in it,
It is biased in a certain direction.

[0004] A hairspring 12c for conduction is provided on the second pinion 12a.
A lead wire (not shown) is soldered to one end of c and connected to an external display. The current flowing through this lead wire passes through the balance spring 12c, the second pinion 12a, and the second segment 12, and conducts to a contact attached to the second segment 12, which will be described later. Since these are pivotally supported on the base plate 8 and the receiving plate 10 via precious stones, the base plate 8 and the receiving plate 10 are in an insulated state.

[0005] First and second contacts 18 and 20 are attached to the end of the second segment 12 in the movable direction (the horizontal direction in FIG. 3). The first and second contacts 18, 2
The first and second contact levers 22 and 24 rotatably attached to the base plate 8 are provided in the movement direction of 0.
Contact receivers 22a and 24a are attached to portions where the first and second contacts 18 and 20 abut, respectively, via insulating members. Then, lead wires (not shown) for establishing conduction are soldered to the contact receivers 22a and 24a, and are connected to an external display. The first and second contact levers 22 and 24 are urged by springs 26 and 28 in a direction to be separated from the first and second contacts 18 and 20.

In the conventional signal indicator having the above-mentioned main structure, the vertical movement of the spindle 2 in the figure is controlled by the spindle rear portion 2a and the L washer 4b.
It is transmitted to the segment 4 to rotate it. The amount of movement at this time is expanded to the ratio of the distance from the ball to the ball on the ball-sensitive axis 4a and the pitch radius of the first segment 4, centering on the truest 6. Next, the second pinion 12a meshing with the first segment 4 rotates, and at the same time, the second segment 12 also rotates. As a result, the third pinion meshing with the second segment 12 rotates, and the pointer attached to its tip rotates to indicate the displacement. At this time, the enlargement ratio of the second kana 12a and the second segment 12 is determined by the pitch radius ratio,
The minute movement of the spindle 2 is enlarged to the product of the respective enlargement ratios of the first segment 4 and the second segment 12 and displayed.

Although the accuracy of this indicator is largely determined by the dimensional accuracy of the above-mentioned various parts, the ball-mounted sensitivity shaft 4a attached to the L washer 4b is fixed at a position where the ball fixing position is eccentric with respect to the axis center. By rotating the ball-mounted sensitivity shaft 4a, the magnification can be adjusted somewhat to adjust the accuracy.

When the second segment 12 rotates, the first and second contacts 18 and 20 swing right and left with the rotation. When the spindle 2 moves downward by a certain amount in the figure, the first contact 18 and the first contact lever 2
The two contact receivers 22a abut. At this time, electrical conduction occurs and the lamp of the external display is turned on. When the spindle 2 moves a predetermined amount upward in the drawing, the second contact 20 and the contact receiver 24a of the second contact lever 24 come into contact with each other, and similarly, electrical conduction occurs and the lamp of the external display is turned on. It has a configuration.

Usually, the signal indicator is
A range in which the first and second contacts 18 and 20 contact the contact receivers 22a and 24a of the first and second contact levers 22 and 24, respectively, for specified values having tolerances of (+) and (-). Is within the tolerance range of (+) and (-).
And the positions of the second contact levers 22 and 24 are adjusted.
Therefore, when the movement amount of the spindle 2 is within the tolerance, the first and second contacts 18 and 20 do not contact the contact receivers 22a and 24a of the first and second contact levers 22 and 24, If the tolerance is exceeded, one of the first and second contacts 18, 20 contacts the contact receivers 22a, 24a of the first or second contact levers 22, 24 and is set to the (+) side or the (-) side. The fact that the value is exceeded is indicated by lighting a lamp on an externally provided display based on the contact signal.

Further, a relay circuit provided in the display unit or a sequencer connection circuit separately provided outside is connected to a control circuit or a sequencer, and is connected from the control circuit or the sequencer to an automatic sorter or the like. Thus, control such as automatic sorting has been performed.

[0011]

The above-mentioned conventional signal indicators have a structure such as waterproof, oil-proof, dust-proof, etc., but if they are used for a long time, the first and second contacts 18 and 20 are not connected. In some cases, poor conduction may occur due to wear and dirt of the contact receivers 22a and 24a. When such a conduction failure occurs, the conduction does not occur even though the contacts are in contact, so that the lamp lighting display is not performed and it may be determined that the product is good. That is, in some cases, a good product is determined in spite of a defect, and accurate determination cannot be performed.

Conventionally, the indicator for lighting the lamp is separately provided outside and connected to the indicator by a signal line. Therefore, the contact position setting of the signal indicator has to be set while looking at the remote display, which also has a problem of the efficiency of the setting operation. In addition, the signal indicator is used as a part of a control device such as an automatic sorting machine that uses the signal at the same time as judging pass / fail. For this purpose, a relay circuit or a separate sequencer connection circuit or the like is required together with the display. Also, various wiring codes were required. For this reason, attention has to be paid to the arrangement space of the display and the wiring of the wiring code.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its main object to provide a signal indicator which does not determine a defective product as a non-defective product even if a contact failure occurs. An object of the present invention is to improve the work efficiency of the contact position setting.

[0014]

According to the present invention, there is provided a signal indicator comprising: a spindle; a first segment for converting a linear motion of the spindle into a rotary motion; and a second pinion meshing with the first segment and rotating. A second segment fixed integrally with the second pinion and rotating with the rotation of the second pinion, a third pinion meshing with the second segment and turning, and driven by the third pinion Hands, first and second movable contact levers which are biased in one direction and which are rotated in directions opposite to the biasing direction by the rotation of the second segment, respectively, and the first and second movable levers First and second fixed contact levers provided in a biasing direction of the contact lever and in contact with the first and second contact levers, respectively;
And first and second contact adjusting screws for respectively adjusting the positions of the fixed contact levers. The first and second movable contact levers are adapted to rotate within the set range of the second segment. And when the second segment rotates beyond a set range, one of the first and second movable contact levers is brought into contact with the first and second fixed contact levers. And comes out of contact with each other.

Further, the signal indicator of the present invention comprises:
The first and second movable contact levers and the first and second movable contact levers;
And a display unit for displaying a contact state and a non-contact state with the fixed contact lever.

A circuit board provided with a circuit for displaying the above-mentioned contact and non-contact states and a circuit directly connectable to the sequencer is incorporated in the display section.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the signal indicator of the present invention, the operation of the spindle is converted into a rotation operation in the first segment, and further the third kana is rotated through the second and second segments to indicate the pointer. Drive. At this time, if the operation of the spindle is within the tolerance and the rotation of the second segment is within the set range, the first and second movable contact levers are in contact with the first and second fixed contact levers, respectively. Is held. When the operation of the spindle exceeds the tolerance and the rotation of the second segment exceeds the set range, one of the first and second movable contact levers is pressed by the second segment, and the direction opposite to the biasing direction is pushed. Large rotation in the direction. As a result, one of the first and second movable contact levers is separated from the first or second fixed contact lever, and a signal indicating that the fixed contact lever and the movable contact lever are non-conductive at this time sets the tolerance to ( The lamp lighting indication is displayed on the display unit provided in the indicator that the signal has exceeded the (+) or (-) side.

[0018]

1 is a partially sectional perspective view showing the internal structure of a signal indicator according to one embodiment of the present invention, and FIG.
FIG. 2 is a central vertical sectional view of the signal indicator shown in FIG. 1.

Reference numeral 30 denotes a case, which has a cylindrical portion 3 at the center thereof.
The movement 32 is accommodated in Oa, and the display part 34 is provided in the rectangular part 30b in the upper part in the figure.

Reference numeral 36 denotes a spindle. The spindle 36 is attached to a lower portion of the case 30 so as to be able to move up and down in the figure, and a probe 36a is attached to one end thereof, and an end portion is attached to the other end. A rear portion 36b of a U-shape having a rear seat 36c attached thereto is attached thereto. The rear of the spindle 36b has a case 30
A lift lever 40, which is rotatably mounted on and is urged by a measuring force spring 38, is engaged, and is configured to be constantly urged downward in the figure. Reference numeral 30c is a guide pin fixed to the case 30. This guide pin 30c
Is engaged with the sliding portion of the spindle rear portion 36b to restrict the radial movement of the spindle 36. As a result, the spindle 36 moves only in the thrust direction.

Reference numeral 42 denotes a main plate for supporting the movement, and reference numeral 44 denotes a receiving plate fixed so as to face the main plate 42.
The base plate 42 is fixed to the case 30 via an insulating member.

Reference numeral 46 denotes a first segment. One end is provided with an L washer 46b to which a sensitivity shaft 46a with a ball is fixed, and the other end is provided with a substantially fan-shaped tooth 46c. The first segment 46 is rotatably supported by a first stem 48 rotatably held between the main plate 42 and the receiving plate 44 via a precious stone together with the L washer 46b. Also, the ball of the sensitivity axis 46a with the ball is the spindle 3
6 is positioned so as to contact the rear seat 36c. The weight of the first segment 46 is balanced around the first true 48.

Reference numeral 50 denotes a second segment, which is rotatably supported by being fixed to a second pin 52 rotatably held between the main plate 42 and the receiving plate 44 via a precious stone. The second segment 50 is integrated with the fan-shaped second pinion 50 a fixed to the second pin 52 via the second pin 52, and the second pinion 50 a is a tooth profile of the first segment 46. 46c. The end of the second segment 50 is provided with a fan-shaped tooth profile 50b. The second segment 50 has an equilibrium weight 51 attached to the upper end thereof, and the second segment 50 is weight-balanced around the second stem 52. The second pinion 50a may be a pin having a substantially cylindrical shape integrated with the second pin 52.

Numeral 54 designates a third pinion, which is held between the upper seat 44a fixed to the receiving plate 44 and the main plate 42 via a precious stone, a pointer 56 is attached to the tip thereof, and a balance spring 58 is further involved. It is attached in a state where it is attached and is urged in one direction. A scale plate 57 is provided directly below the pointer 56 attached to the tip of the third kana 54.

Reference numerals 60 and 62 denote first and second movable contact levers. The first and second movable contact levers 60, 6
Reference numeral 2 denotes an abutment part which has its center approximately pivotally attached to the base plate 42 and the receiving plate 44 by pivots 60a and 62a via a pivot bearing. 60b and 62b are provided, and first and second contacts 60c and 62c are provided at the other end. The first and second movable contact levers 60, 62 are urged toward their first and second fixed contact levers 60c, 62c, respectively, in a direction to be described later. , Springs 64 and 66.

Reference numerals 68 and 70 denote first and second fixed contact levers, which are rotatably mounted on the base plate 42 by shafts 68a and 70a. The first and second fixed contact levers 68 and 70 have first and second contact receivers 68b and 70b at their ends via an insulating member.
Lead wires (not shown) are soldered to the first and second contact receptacles 68b and 70b, and the circuit board 8 of the display unit 34 is provided.
Connected to 0. The first and second fixed contact levers 68 and 70 are urged by springs 72 and 74 in the direction of first and second contact adjustment screws described later.

Reference numerals 76 and 78 denote first and second contact adjustment screws, which are rotated to change their positions, so that the positions of the first and second fixed contact levers 68 and 70 which are pressed at their tips are changed. Can be adjusted.

Reference numeral 42a denotes a lug terminal attached to the main plate 42. A lead wire (not shown) is connected to the lug terminal 42a.
Are soldered and connected to the circuit board 80 of the display unit 34. The current flowing through the lead wire and the lug terminal 42a passes through the main plate 42, the shafts 60a and 62a, and the first and second movable contact levers 60 and 62, and the first and second contacts 6
It conducts to 0c and 62c.

Next, the handling and operation of the signal indicator of the present embodiment having the above configuration will be described. At high comparator instrument of this kind of accuracy, for example, when measuring the dimensions specified value T _1, using the reference size pieces T ₀ very close dimensions to the dimensions specified value T _1, the reference dimension piece T ₀ In the measurement state, the signal indicator is slightly moved up and down by a dimensional difference between the prescribed dimension value T ₁ and the reference dimension piece dimension value T ₀ to shift the pointer position from the 0 position of the scale plate, thereby causing the 0
Position can be set to a prescribed dimension T ₁ of the. Alternatively, in the case of a signal indicator having a scale plate rotating mechanism, the scale plate is rotated so that the zero position of the scale plate is displaced from the pointer position by a dimensional difference to set the zero position of the scale plate to the specified dimensional value T _1. Can be set to By setting in this manner, the pointer indicates 0 when the size of the object to be measured is a specified value, indicates the scale on the (+) side when the measured value is larger than the specified value, and (-) when the measured value is smaller than the specified value. The display mode can be set to point to the scale on the side.

After setting the display mode as described above, the contact positions on the (-) side and (+) side are set. The position setting of the contact is performed in the following manner. First, the left and right contact adjusting screws (contact adjusting screws 76 and 78 in the present embodiment) are fully pushed in, and then the lift screw 41 attached to the case 30 is turned and pushed. At this time, the lift screw 41 presses the end of the lift lever 40,
The engagement side with the spindle rear part 36b is pushed upward.
By this pushing up, the spindle rear portion 36b is pushed up. At this time, the urging force of the measuring force spring 38 does not work, and conversely, the urging force of the balance spring 58 wound and attached to the third pinion 54 works, causing the third pinion 54 to rotate clockwise and simultaneously fixing to the third pinion. The set pointer 56 also rotates clockwise to rotate from the (-) side of the scale plate 57 to the (+) side. Also, at this time, the third segment 54 rotates clockwise to rotate the second segment 50 meshing with the third segment 54 to the left, and at the same time, the second segment 50a also rotates to the left. Further, the left rotation of the second pinion 50a causes the first segment 46 meshing with the second pinion 50a to rotate right, and at the same time, the L washer 4 fixed to the first segment 46.
6b also rotates clockwise, and the ball of the sensitivity shaft 46a with the ball fixed to the L washer 46b follows while contacting the rear seat 36c fixed to the spindle rear portion 36b. The contact position on the (−) side is set by pushing the lift screw 41 in the above-described manner to move the pointer to a predetermined (−) scale position, and then adjusting the contact on the (−) side by the contact adjustment screw (this embodiment). In the example, the second contact adjusting screw 78) is returned and stopped at the position where the lamp on the (-) side of the display (the lamp 34c in the present embodiment) is turned on. To set the contact position on the (+) side, push the lift screw 41 further in the same way to set the pointer to the predetermined (+) position, and then return the contact adjustment screw for adjusting the (+) side contact, and return to the (+) side. Stop at the position where the lamp lights. Thus, the contact positions on both the (-) side and the (+) side are set. After the setting is completed, the lift screw 41 is
Used to return to a position where it does not contact. If the lift screw mechanism is not provided, it is set using predetermined dimension reference pieces on the (-) side and the (+) side.

The signal indicator in this embodiment is also set as described above at the time of measurement, and the operation of each unit at the time of measurement in the above set state will be described below.
First, when the size of the object to be measured is almost at the specified value, the pointer 56 points to almost 0 of the scale plate 57. At this time, the first and second contacts 60c, 62c come into contact with the first and second contact receivers 68b, 70b, respectively, since the second segment 50 is located substantially at the center in FIG. Therefore, these first and second contacts 60c, 6c
2c and the first and second contact receivers 68b, 70b,
The signal at the time of contact is transmitted to the circuit board 80 in the display unit 34, and the central lamp 34a attached to the circuit board 80
Lights up to indicate that the measured value is within the specified tolerance.

If the size of the object to be measured is smaller than the specified value, the spindle 36 in contact with the object to be measured is lowered downward in the figure by the force of the measuring force spring 38.
As a result, the first segment 46 rotates counterclockwise about the first true 48, and the second segment 50 rotates clockwise about the second true 52 as the second pinion 50a meshes with the tooth profile portion 46c and rotates. I do. As a result, the upper end of the second segment 50 tilts rightward in the figure, and the second movable contact lever 6
The second contact portion 62b is pressed rightward in the figure. For this reason, the second movable contact lever 62 rotates clockwise, and the second contact 62c provided at the lower end thereof is separated from the second contact receiver 70b to be in a non-contact state. Thus, the second contact 6
When the second contact 62c and the second contact receiver 70b enter a non-contact state, a signal at the time of non-contact is transmitted from the second contact 62c and the second contact receiver 70b to the circuit board 80 in the display unit 34, and The attached left lamp 34c is turned on to indicate that the measured value is smaller than the specified value and the (-) side has a dimensional defect.

On the other hand, if the size of the measured object is larger than the specified value, the spindle 36 is pushed upward by the measured object. At this time, the function of the urging force of the measuring force spring 38 is lost, and conversely, the urging force of the balance spring 58 wound and attached to the third pinion 54 acts, and
Causes a right rotation, and the second segment 50 meshing therewith rotates to the left. When the second segment 50 rotates counterclockwise in this manner, the upper end of the second segment 50 presses the contact portion 60b of the first movable contact lever 60 leftward in the drawing. For this reason,
The first movable contact lever 60 rotates counterclockwise, and separates the first contact 60c provided at the lower end thereof from the first contact receiver 68b to bring it into a non-contact state. As described above, when the first contact 60c and the first contact receiver 68b are brought into a non-contact state,
A signal at the time of non-contact is transmitted from the first contact 60c and the first contact receiver 68b to the circuit board 80 in the display unit 34, and the right lamp 34b attached to the circuit board 80 is turned on to specify a measured value. A value larger than the value indicates that the dimension is defective on the (+) side.

As described above, in this embodiment, the first and second contacts 60c, 62c and the first and second contact receivers 68b, 70b are in contact with each other when the measured value is within a specified value tolerance. When the measured value deviates from the tolerance on the (+) or (-) side and becomes a dimensional defect, a non-contact state is established. Therefore, if a contact failure occurs due to contamination of the contact portion or the like, a conduction failure occurs, a non-contact signal is output, and a non-defective product is displayed as defective. As a result, it is possible to prevent a non-measured object including a defective product for which correct measurement has not been performed from being determined as a good product.

Further, a sequencer connection circuit (not shown) is provided on a circuit board 80 in the display section 34. Therefore, it can be directly connected to the sequencer.

In this embodiment, for example, the dimension on the (+) side from the 12 o'clock position to the 3 o'clock position in FIG.
If the 9 o'clock direction from the hour position is set as an area indicating the dimension on the (-) side, the non-contact when the pointer swings to the (+) side (right side in the figure) is the position located on the left side in the figure. The first contact 60c, and the non-contact when the pointer swings to the (-) side (left side in the figure) is the second contact 62c located on the right side in the figure.
It is. Therefore, it is necessary to adjust the contact position by operating the first and second contact adjusting screws 76 and 78 in the opposite direction to the direction indicated by the pointer. This can be configured so that the adjustment of the contact can be adjusted by a contact adjusting screw in the direction in which the pointer swings. In this case, the first and second movable contact levers 60 and 62 can be adjusted. The first and second movable contact levers 6 are formed by reversing the upper and lower sides of the first and second fixed contact levers 68 and 70 with respect to the axis.
The contact portions 60b and 62b of the second segments 50
Abut on the part below the second truth 52 of
It is also possible to adopt a configuration in which the direction in which the pointer swings and the positions of the contact and the adjusting screw that are not in contact at that time are adjusted.

[0037]

According to the present invention, a non-defective product is displayed when a contact portion is in contact with a non-defective product. If a fault occurs in the contact portion due to some abnormality and the non-conductivity is established, a defective product is displayed. Therefore, it is not necessary to determine an object to be measured including a defective product that has not been correctly measured as a non-defective product, and it is possible to prevent a defective product from being mixed into a non-defective product. In addition, since the user can be alerted by a defective signal, it is possible to prevent the continued production of defective products and the spread of damage.

Further, since not only the pointer display but also a display unit for displaying the occurrence of a defect with a lamp is provided integrally, the visibility is improved and the work of setting the contact position can be facilitated. In addition, there is no need for a separately provided external display, and there is no need to pay attention to the arrangement space and the like.

Further, since the sequencer connection circuit is also incorporated in the circuit board in the display unit, it can be directly connected to the sequencer by a cord, and it is not necessary to pay much attention to the wiring of the cord.

Further, in addition to the effects described above, since the signal indicator of the present invention is integrally provided with a display and a sequencer connection circuit, there is no need to provide a separate external unit, and the cost is very low. Things.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional perspective view showing an internal structure of a signal indicator according to one embodiment of the present invention.

FIG. 2 is a central vertical sectional view of the signal indicator shown in FIG. 1;

FIG. 3 is a front view showing a main part structure of a conventional signal indicator.

FIG. 4 is a sectional view of a main structure of the signal indicator shown in FIG. 3;

[Explanation of symbols]

 34 Display part 34a, 34b, 34c Lamp 36 Spindle 36a Probe 36b Spindle rear part 46 First segment 46a Sensitivity axis with ball 46b L washer 46c Toothed part 48 Most true 50 Second segment 50a Second pinion 50b Toothed part 52 No. 52 Shin 54 Third Kana 56 Pointers 60, 62 First and second movable contact levers 60b, 62b Contact portions 60c, 62c First and second contacts 68, 70 First and second fixed contact levers 68b, 70b First and second contact receivers 76, 78 First and second contact adjustment screws 80 Circuit board

──────────────────────────────────────────────────の Continued from the front page Examiner Takuya Okada (56) References JP-A-47-10788 (JP, A) JP-B-35-12436 (JP, B1) (58) Fields investigated (Int. Cl. ⁷⁾ , DB name) G01B 3/00-3/56

Claims (3)

(57) [Claims] 1. A spindle, a first segment that converts a linear motion of the spindle into a rotary motion, a second pinion that meshes with the first segment and rotates, and is integrally fixed with the second pinion. A second segment rotating with the rotation of the second pinion, a third pinion engaged with the second segment and rotating, a pointer driven by the third pinion, The first and second rotating members rotate in directions opposite to the biasing direction by rotating the second segment.
A movable contact lever, and first and second fixed contact levers provided in a biasing direction of the first and second movable contact levers and contacting the first and second contact levers, respectively; And first and second contact adjusting screws for adjusting the positions of the first and second fixed contact levers, respectively, wherein the first and second movable contact levers rotate within a set range of the second segment. Then, the contact state with the first and second fixed contact levers is maintained, and the second
When the segment rotates beyond a set range, one of the first and second movable contact levers is separated from the first and second fixed contact levers and becomes non-contact. 2. A display unit for integrally displaying a contact state and a non-contact state between said first and second movable contact levers and said first and second fixed contact levers. The signal indicator according to claim 1. 3. A circuit for displaying a contact / non-contact state between the first and second movable contact levers and the first and second fixed contact levers in the display unit, and can be directly connected to a sequencer. 3. The signal indicator according to claim 1, further comprising a circuit board provided with various circuits.