JP2523706Y2 - Instruction adjustment jig - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to an instruction adjusting jig.
In particular, the present invention relates to an instruction adjusting jig suitable for adjusting a moving position of a recording needle of an operation recorder.

[0002]

2. Description of the Related Art Conventionally, an operation recorder is known as an indicating instrument for displaying the speed and the traveling distance of a vehicle and recording the speed and the traveling distance on a chart paper over time.

FIG. 6 shows an operation recorder 1 of this type, in which a mounting plate 3 is provided in a main case 2. The mounting plate 3 has a potentiometer 4, a driving motor 5 and a driving motor 5. A rack 7 slidably guided by a pair of guide rails 6 is attached. The rotational force of the drive motor 5 is transmitted to the input gear 10 of the potentiometer 4 via a pinion 8 fixed to the rotary shaft 5a and gear trains 9a to 9c mounted on the mounting plate 3. As a result, the rotating shaft 4a of the potentiometer 4 is rotated, and the output gear 11 fixed to the rotating shaft 4a is rotated.

The rack 7 is meshed with the output gear 11 so that the rack 7 is driven linearly along the guide rail 6 by the rotation of the output gear 11. The recording needles 12 move linearly together. The output gear 11 is integrally formed with a coupling portion 11a for transmitting a rotational force to a pointer (not shown).
1a and the recording needle 12 project from a center hole 13 and a viewing window 14 formed in the main case 2, respectively.

In a cover case 15 provided in the main case 2 so as to be openable and closable, a chart paper 16 rotatably driven by the clock is provided together with a speedometer, a clock and the like (not shown).
A coupling 17 protruding toward the main case 2 is provided on the rotation shaft of the pointer of the speedometer. When the lid case 15 is closed with respect to the main case 2, the recording needle 12 comes into contact with the paper surface of the chart paper 16, and the coupling 17 of the pointer is coupled to the coupling portion 11 a of the output gear 11. The pointer is driven to rotate in accordance with the rotation of the output gear 11, and the recording needle 12 that moves together with the rack 7 linearly moves in the radial direction with respect to the chart paper 16. 16 is rotated with the advance of the timepiece, so that a speed record or the like is recorded on the paper.

[0006] Since the operation recorder 1 is an indicating instrument, in order to secure its accuracy and improve the quality of the product, various kinds of instruction adjusting work are performed at the time of assembly. As one of them, an operation of adjusting the moving position of the recording needle 12 that moves linearly in the radial direction of the chart paper 16 is performed.

FIG. 7 shows an operation for adjusting the moving position of the recording needle 12, and the operation includes a potentiometer as a recording mechanism, a drive motor, a guide rail, a rack provided with the recording needle 12, and the like. Is mounted in the main case 2 in a state where the mounting plate is mounted in the main case 2.

That is, a substantially semi-cylindrical pointing adjustment jig having a bottom plate is provided at the open end of the main case 2 on which the mounting plate is mounted so that the tip of the recording needle 12 projects from the viewing window 14. The jig 18 is incorporated from the front side of the main case 2, and a transparent scribe plate 19 having a plurality of concentric scribe lines 19 a formed at equal pitches is formed on a bottom plate portion of the jig 18. It is adapted to be fitted. Here, the scribe line 19a is a concentric ruled line 16a formed on the surface of the chart paper with which the recording needle 12 abuts.
(FIG. 6).

In this state, when the drive motor is driven to rotate based on a predetermined inspection signal, the recording needle 12 moves linearly in the radial direction of the chart paper (the radial direction of the main case 2). At this time, the operator adjusts the moving position of the recording needle 12 while checking the position of the recording needle 12 with respect to the scribe line 19a of the scribe plate 19. When the operation of adjusting the moving position of the recording needle 12 is completed, the instruction adjusting jig 18 is removed, and
A cover case is attached to the main case 2, and the recording needle 12 is bent so that the position at which the recording needle 12 comes into contact with the chart paper attached to the cover case becomes a predetermined zero point position. By performing the adjustment, the final position adjustment work of the recording needle 12 is performed.

[0010]

However, the conventional operation of adjusting the moving position of the recording needle 12 requires the above-described pointing adjustment jig before performing the bending adjustment of the zero point position of the recording needle 12 with respect to the chart paper 16. 18, and a scribe line 19 a of a scribe plate 19 of the jig 18.
The adjustment is performed by checking the position of the recording needle 12 with respect to the recording needle 12, and as shown in FIG. 8, the zero point position of the scribe line 19a (the zero point position of the chart paper) and the recording needle 1
In some cases, the position of the recording needle 12 is displaced from the scribe line 19a in such a state that the position of the recording needle 12 is displaced from the zero point position of No. 2 as a result, as shown in FIG. The operator must perform an adjustment operation while visually checking the deviation amount of the recording needle 12 from the reference scribe line 19a so that, for example, 00 '= AA' = BB '= CC'. As a result, an error in the operation of adjusting the moving position of the recording needle 12 increases, and it becomes difficult to ensure the accuracy of the indicating instrument, which is disadvantageous in improving the quality of the product.

[0011] The present invention has been made in view of the above points, it is possible to reduce the adjustment error at the time of adjusting the movement position of the recording needle of the operation recorder, to ensure the accuracy of the indicating instrument, It is an object of the present invention to provide an instruction adjusting jig capable of improving the quality of a product.

[0012]

In order to achieve the above object, an instruction adjusting jig according to the present invention comprises a main case in which a recording mechanism such as a recording needle is housed, and a jig which can be opened and closed on the front surface of the main case. And a lid case for holding a chart paper with which a recording needle projecting from the main case is brought into contact when closed.The operation recorder is incorporated into the front surface of the main case, and the recording needle based on a predetermined inspection signal. An instruction adjusting jig adapted to adjust the radial movement position of the chart paper, wherein the guide ring has an opening incorporated in the front surface of the main case and which allows the recording needle to be visually recognized, and the guide ring. A transparent scribe plate provided rotatably with respect to the guide ring with respect to the guide ring and having scribe lines formed at the same pitch as the ruled lines of the chart paper, wherein the center of rotation of the scribe plate and the scribe mark are provided. And the center of is one which its characterized in that eccentrically.

[0013]

According to the present invention, a guide ring which is incorporated in the front of the main case and has an opening through which the recording needle can be visually recognized, and which is disposed on the front of the guide ring so as to be rotatable with respect to the guide ring, A transparent scribe plate having scribe lines formed at the same pitch as the ruled lines of the chart paper is provided.Since the center of rotation of the scribe plate and the center of the scribe line are eccentric, such a scribe plate is provided. By rotating the guide ring with respect to the guide ring, before and after the rotation, the positional relationship between the recording needle and the marking line, which can be visually recognized through the opening of the marking plate and the guide ring, changes. Even if the zero point position of the recording needle visible through the opening of the marking plate and the guide ring does not match the zero point position of the marking line of the marking plate, the recording is performed by appropriately rotating the marking plate. 0 point between needle and scribe line It can be matched, in this state, by performing the adjustment of the movement position of the recording needle, but it is possible to reduce the adjustment error.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. The same reference numerals are used for the same parts as in the prior art, and the description thereof will be omitted. FIGS. 1 to 4 show an embodiment of an instruction adjusting jig 18 according to the present invention.
Is provided with a substantially semi-cylindrical guide ring 20 having a bottom plate, which is incorporated into an open end (front side of the main case 2) of the main case 2 of the operation recorder. On the periphery of the guide ring 20, the flange 2 of the main case 2 is provided.
a, an engaging portion 20a which is fitted to the outside is formed.
A long hole 20b is formed in the bottom plate so that the recording needle 12 protruding from the viewing window of the main case 2 can be visually recognized, and a center hole 20c is formed in the center thereof.

A guide ring 20 is provided in the center hole 20c.
The pivot shaft 21 protruding from the rear side to the front side is the sleeve 2
The guide ring 2 is provided on the projecting portion of the pivot 21 through sleeves 23a and 23b.
The center hole 19b of a substantially quarter-circle transparent scribing plate 19 whose diameter is slightly smaller than that of the bottom plate portion 0 is pivotally mounted, whereby the scribing plate 19 is positioned on the front side of the guide ring 20. The guide ring 20 (main case 2) is rotatably disposed.

At the projecting end of the pivot shaft 21, a retaining ring 24 for preventing the scribing plate 19 from coming off the pivot shaft 21 is provided via a C spring 25. The scribe plate 19 is urged toward the guide ring 20 by the urging force of the C spring 25, and the scribe plate 19 is
It is designed to rotate with a resistance to zero. Further, the scribe plate 19 is provided with scribe lines 19a having the same pitch as the concentric ruled lines formed on the chart paper. Reference numeral 26 denotes a handle used to rotate the scribe plate 19.

In the present embodiment, the center C ₁ of the center hole 20c of the guide ring 20 is shifted from the center C _A of the main case 2 (that is, the center of the operation recorder) as shown in FIGS.
Is eccentric to the right by, for example, h ₁ = 1 mm.
Center line CL ₁ of the is adapted to pass through the center C _A of the main casing 2. The center C ₂ of the center hole 19b of the scribe plate 19 attached via the pivot 21 provided in the center hole 20c is also the center C _{A of the} main case 2.
It adapted to eccentric by h ₁ = 1 mm to the right from, thereby, only h ₁ = 1 mm to the right relative to the center C _A rotation center C _B of the main case 2 of the scribe plate 19 eccentrically It is supposed to. Furthermore, the center C _C scribe lines 19a formed in the scribe plate 19 from the rotation center C _B scribe plate 19, so as to eccentrically only example h ₂ = 2 mm downward in FIGS. 1 and 4 .

Next, the operation of adjusting the moving position of the recording needle 12 of the operation recorder using the instruction adjusting jig 18 will be described. When a recording mechanism having a drive motor, a recording needle 12 and the like is assembled into the main case 2 of the operation recorder such that the tip of the recording needle 12 projects from the view window of the main case 2, the front side of the main case 2 Then, the above-described instruction adjusting jig 18 is incorporated in the state shown in FIGS. When the instruction adjusting jig 18 is visually recognized from the front side of the main case 2 in this state, the recording needle 12 can be visually recognized through the transparent marking plate 19 of the jig 18 and the elongated hole 20b of the guide ring 20. ing.

[0019] In this state, when on the basis of a predetermined test signal is driven to rotate the drive motor, as shown in FIG. 3, the long hole 20b passing through the center C _A of the main case 2 is a radial chart paper Along the center line CL ₁ of the recording needle 12
Are moved linearly up and down. At this time, the position of the recording needle 12 with respect to the scribe line 19a of the scribe plate 19 is checked while the moving position of the recording needle 12 is adjusted. ing.

The adjustment operation by the jig 18 described above is performed before the bending adjustment of the recording needle 12 so that the position where the recording needle 12 contacts the actual chart paper becomes zero. In some cases, the zero point position of the recording needle 12 visually recognized through the scribe plate 19 does not match the zero point position of the scribe line 19a of the scribe plate 19 (the zero point position of the chart paper).

In such a case, as shown by a two-dot chain line in FIG.
Rotate 0 °. This way, as mentioned above,
Center C of scribe line 19a C Center of rotation _C of scribe plate 19
Since eccentric with respect to _B, by rotating the such marking plate 19 about the rotation center C _B, as shown by the two-dot chain line, so that the entire scribe line 19a is moved upward in the drawing become. Then, the zero point position of the recording needle 12 visually recognized through the scribe plate 19 and the scribe line 19 of the scribe plate 19
By appropriately rotating the scribe plate 19 until the zero point position of a coincides with the zero point position and holding the scribe plate 19 in place, the zero point position of the recording needle 12 and the scribe line 19a can be matched. By rotating the drive motor based on a predetermined inspection signal in this state, the operation of adjusting the moving position of the recording needle 12 can be reliably performed.

[0022] Incidentally, as shown in FIG. 5, merely the center C _C scribe line 19a is eccentric with respect to the rotation center C _B scribe plate 19, as in the present embodiment, marking plate 1
When 9 is the rotation center C _B like not eccentric with respect to the center C _A of the main case 2 (the center of the operation recorder) is the centerline CL ₁ in which recording needle passes through the center C _A of the main case 2 to move linearly up and down along, before rotating the scribe plate 19, becomes the L ₁ part scribe line 19a as shown as recording the needle is moved, also the scribe plate 19 90 °
After rotating to the right, the recording needle L ₂ portion of the figure marking line 19a is to move, the distance L ₁ recording needle 12 moves relative to the marking line 19a <L ₂ becomes As a result, before and after rotating the scribe plate 19, the scribe line 1
The pitch of 9a will change.

Therefore, when the moving position of the recording needle 12 is adjusted with reference to the scribe line 19a in which the pitch changes,
This is better than the adjustment work performed by visual check in a state where the position of the recording needle is shifted from the conventional scribe line, but the adjustment error still increases.

On the other hand, as in the present embodiment, the positions of the center C _A of the main case 2, the rotation center C _B of the scribe plate 19, and the center C _C of the scribe line 19a are all set as described above. by staggered, as shown in FIG. 1, prior to rotating the scribe plate 19, a recording needle is to move the L ₃ portion relative marking line 19a, the scribe plate 19 90 °
After rotating to the right, the recording needle relative to the marking line 19a is to move the L ₄ moiety by a L ₃ = L ₄ As is clear from the figure, rotates the scribe plate 19 Before and after, the pitch of the scribe line 19a does not change at all, and extremely accurate adjustment can be performed by adjusting the movement position of the recording needle based on the scribe line 19a. Things.

[0025]

As described above, the pointing adjustment jig according to the present invention is incorporated into the front surface of the main case and has a guide ring having an opening through which the recording needle can be visually recognized. A transparent scribe plate is provided rotatably with respect to the guide ring, and has a scribe line formed at the same pitch as the ruled line of the chart paper, and the center of rotation of the scribe plate and the center of the scribe line are provided. By rotating such a scribe plate relative to the guide ring, before and after rotation, the position of the recording needle and the scribe line visible through the opening of the scribe plate and the guide ring The relationship changes, so that even if the zero point position of the recording needle visible through the opening of the scribe plate and the guide ring does not match the zero point position of the scribe line of the scribe plate. , Rotate the scribing plate appropriately Thus, the zero point position between the recording needle and the scribe line can be matched, and in this state, the adjustment error of the moving position of the recording needle can be reduced, and the adjustment error can be reduced. This has the effect of ensuring the accuracy and improving the quality of the product.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of an instruction adjusting jig according to the present invention.

FIG. 2 is a side sectional view showing a state in which the instruction adjusting jig shown in FIG. 1 is incorporated in a main case.

FIG. 3 is a front view showing the guide ring of the present invention.

FIG. 4 is a front view showing the scribe plate of the present invention.

FIG. 5 is a diagram for explaining a movement position of a recording needle when the center of the scribe line is only eccentric from the center of rotation of the scribe plate.

FIG. 6 is an exploded perspective view showing an operation recorder.

FIG. 7 is a diagram illustrating an adjustment operation using a conventional instruction adjustment jig.

FIG. 8 is a diagram for explaining that a zero point position of a recording needle and a zero point position of a scribe line are shifted in a conventional adjustment operation.

FIG. 9 is a diagram illustrating an adjustment operation by a conventional visual check.

[Explanation of symbols]

Rotation center C _C of the center C _B marking plate of 2 main casing 12 records needle 15 case cover 16 chart paper 16a borders 18 instructs adjustment jig 19 marking plate 19a scribe line 20 guide ring 20b long hole C _A main case Center of scribe line

Claims (1)

(57) [Scope of request for utility model registration] 1. A main case accommodating a recording mechanism such as recording needles, and a chart paper which is provided on the front surface of the main case so as to be openable and closable, and which is in contact with recording needles protruding from the main case when closed. An instruction adjusting jig incorporated into the front surface of the main case of the operation recorder having a lid case and adapted to adjust the position of the recording needle in the radial direction of the chart paper based on a predetermined inspection signal. A guide ring that is incorporated into the front of the main case and has an opening that allows the recording needle to be viewed; and a guide ring that is rotatably disposed on the front of the guide ring with respect to the guide ring, An instruction adjusting jig comprising a transparent scribe plate having scribe lines formed at the same pitch, wherein the center of rotation of the scribe plate and the center of the scribe line are eccentric.