JPH0110679Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to a vehicle operation recorder installed in large trucks, taxis, etc., and in particular, the recording needle is moved to a predetermined position by excitation and demagnetization (on and off) of an electromagnet. This invention relates to an electromagnetic recording device that is moved over a range and records the operating status of various devices on chart paper.

[Problems to be solved by conventional techniques and ideas]

The prior art will be explained based on FIGS. 7 to 10.

FIG. 7 is a top view showing the inside of the driving recorder, and the case 1 houses various drive mechanisms that are interlocked with the drive section of the vehicle. Among these, there is an electromagnetic recording device 2 for recording the operating status of, for example, an engine or a taxi fare meter. The recording by this device is as shown in FIG. 8, and is recorded as ON, OFF signals of a predetermined width l on the outermost circumferential portion of the disc-shaped chart paper 3.
That is, for example, when the engine key switch is OFF, the baseline B shown in FIG. Line C is drawn inside by l. As a result, the engine operating time and time are completely recorded on the chart paper 3.

The electromagnetic recording device 1 is composed of an electromagnet 4, a magnetic piece 5, a movable holder 6, a recording needle 7, etc. When the engine key is turned on, current flows through the electromagnetic coil, the electromagnet 4 is driven, and the movable holder 6 is The recording needle 7 on the movable holder is operated by attracting the magnetic piece 5.

FIGS. 9 and 10 are enlarged perspective views of the main parts of this magnetic recording device.

An electromagnet 4 is fixed within the case 1. The electromagnet 4 includes an iron core 8, an electromagnetic coil 9 wound around the iron core 8, and pole plates 10 and 1 that contact both ends of the iron core 8 and support the iron core 8.
1. It consists of a lead wire 12 etc. that feeds power to the electromagnetic coil 9, and a lower electrode plate 11 is fixed inside the case 1 with screws 13. And the electrode plates 10, 11
One side is formed as flat portions 10a, 11a.

The movable holder 6 is rotatably supported by a shaft 14, a magnetic piece 5 made of iron or the like is fixed to one end, and a recording needle 7 is attached to the other end via a support 15. The magnetic piece 5 faces the flat portions 10a, 11a of the two polar plates 10, 11 with a slight gap, and normally the spring 16
is urged in a direction away from the flat portions 10a, 11a.

As can be seen from FIG. 10 with the recording needle 7 removed, the movable holder 6 integrally has a locking piece 6a, and when the magnetic piece 5 is separated from the pole plates 10, 11, this locking piece 6a is in contact with a stopper pin 17 provided upright within the case 1.

In the above electromagnetic recording device, when a current flows through the electromagnetic coil 9, the magnetic piece 5 is attracted by the bipolar plates 10 and 11 against the spring 16, and the movable holder 6 rotates around the shaft 14, causing the magnetic The pieces 5 contact the flat parts 10a, 11a of the plates. Therefore, since the recording needle 7 moves by a predetermined stroke, a record as shown in FIG. 8 is made on the chart paper 3, which is rotating with time.

However, in such a device, if there is a misalignment in the positional relationship between the magnetic piece 5 and the flat portions 10a and 11a of the pole plate, or if the magnetic piece 5 is deformed, the magnetic piece 5 may become polarized when it is attracted. If the recording needle 7 contacts only one of the flat portions 10a, 11a of the plates 10, 11, or the contact state becomes unstable, the recording needle 7 cannot accurately draw at a predetermined position on the chart paper 3.

In order to counter these problems, the conventional device uses an electromagnet 4.
Adjustment of screw position, adjustment by deformation of magnetic piece 5, adjustment by deformation of locking piece 6a, adjustment by deformation of locking piece 6a, movable holder 6
Adjustment of the screwing position of the support member 15 and deformation of the support member 15 are performed, but these are very complicated and require long hours of work by skilled practitioners. Moreover, even if this type of adjustment is performed, it is very difficult to set the movement stroke of the recording needle, that is, the width l of the line drawn on the chart paper, to a predetermined value.

The present invention has been made in view of the above points, and it is an object of the present invention to provide an electromagnetic recording device for a driving recorder that is easy to adjust, and in particular, can set the width of a line drawn on chart paper to a predetermined value without variation. The purpose is

[Means for solving problems]

In order to achieve the above object, the present invention provides a regulating part on the pole plate that engages with a part of the movable holder to regulate the movable range of the movable holder, and turns the electromagnet ON and OFF.
The present invention is characterized by a configuration in which the position of the recording needle at a time is determined by the regulating portion regardless of whether the magnetic piece and the pole plate come into contact with each other or separate from each other.

〔Example〕

FIG. 1 is a top view of an electromagnetic recording device in an embodiment.

The electromagnet 4 is made up of an iron core, an electromagnetic coil, a pole plate, etc., and is fixed in the case 1 with screws 13, as in the conventional device. A movable holder 6 rotatably supported on a shaft 14 is disposed at a side position of the electromagnet 4, similar to the conventional device.
A recording needle 7 is connected to one end of the recording needle 7 via a support member 15.
is attached, and a magnetic piece 5 is fixed to the other end.

The movable holder 6 and the support member 15 are screwed to the movable holder 6 with screws 18, as shown in the plan view of FIG. A rib 6'' stands up around the screw hole 6' of the movable holder 6, and is fitted into the screw insertion hole 15a of the support member 15, and a boss 6b integrally formed on the movable holder 6 is inserted into the support member 15. They engage with the boss holes 15b to position each other.

The magnetic piece 5 has three elastic claws 6c as shown in FIG. 3 integrally formed on a movable holder 6 made of synthetic resin.
, and faces the flat portions 10a, 11a of the bipolar plates 10, 11 of the electromagnet 4, as in the conventional case.

FIG. 4 is a perspective view showing the general appearance of the electromagnet 4, in which pole plates 10 and 11 made of magnetic material are attached to the outer step portions 9a of the holder at both ends of the electromagnetic coil 9.
0 and 11 are in contact with the iron core 8. One plate 1
0 is extended to one side and has a notch-shaped regulating part 1 in the center.
0b, and the other electrode plate 11 is also extended and provided with a hole 11b therein.

FIGS. 5a and 5b are a plan view and a sectional view of the case for explaining the positioning structure of the electromagnet 4 in the case 1, in which the iron core 8 protruding toward the pole plate 11 is shown.
The end portion of the rib 1c is fitted into the non-circular positioning hole 1a on the case 1, and the rib 1c which stands up from the screw hole 1b into which the screw 13 is screwed is fitted into the hole 11b of the electrode plate 11.

FIG. 6 is a sectional view showing the relationship between the electrode plate 10 and the movable holder 6.

The movable holder 6 has a portion extending further from the attachment portion of the magnetic piece 5, and its tip is raised upward to form an engaging portion 6d. As shown in the figure, this engaging portion 6d has a predetermined width a and is located within the regulating portion 10b of the electrode plate 10. Regulation part 10b
The width b is larger than the width a of the engaging portion 6d, and the difference b-a is appropriately determined by the rotation range of the movable holder 6, in other words, the preset movement stroke of the recording needle 7. Become.

Therefore, since the width l of the recording line on the chart paper is determined by the width a of the engaging part 6d and the width b of the regulating part 10b, when the electromagnet 4 is attracted, the engaging part 6
Although one side of the magnetic piece d contacts one side of the regulating portion 10b, it is desirable that the magnetic piece 5 does not contact the pole plate 10 or 11.

The adjustment in the electromagnetic recording device of this embodiment basically involves determining the position of the baseline on chart paper.
and the determination of the width of the recording line drawn relative to the baseline. In the above embodiment, the movable holder 6 and the support member 15 are connected to the rib 6'' and the hole 15.
a, the boss 6b and the hole 15b, and are connected by screwing, and the electromagnet 4 is also connected to the case 1 by fitting the iron core 8 and the hole 1a, and the hole 11b and the rib 1c, and screwing with the screw 13. Therefore, the position of the recording needle 7 relative to the chart paper is set in advance with high accuracy, and almost no adjustment is required. If necessary, only the support member 15 holding the recording needle 7 may be deformed. In addition, the latter has a width b of the regulating portion 10b of the electrode plate 10 as described above.
Since it is uniquely determined by the width a of the engaging portion 6d of the movable holder 6, there is no need for any particular adjustment.

[Effect of idea]

As explained above, the present invention allows the movement stroke of the recorder to be controlled independently of the contact and separation of the pole plate and the magnetic piece.
This is controlled by the direct engagement relationship between the electrode plate and the movable holder. Therefore, the movement stroke of the recorder is uniquely determined in advance, and the width of the recording line on the chart paper can also be made constant without variation.

[Brief explanation of drawings]

FIG. 1 is a plan view of essential parts of an embodiment of the present invention, FIGS.
The figure is a perspective view showing the fixing means for the magnetic piece in the embodiment, FIG. 4 is a perspective view of the electromagnet in the embodiment, and FIGS. Fig. 6 is a sectional view showing the engagement relationship between the electrode plate and the movable holder in the embodiment, Fig. 7 is a plan view showing the internal structure of a conventional driving recorder, and Fig. 8 shows the recording mode on chart paper. A is a partial plan view of the chart paper, b is an enlarged view of the recorded record, FIG. 9 is a perspective view of the main parts of a conventional electromagnetic recording device, and FIG. 10 is an explanation of the operating stroke of the movable holder in the conventional device. FIG. 2... Electromagnetic recording device, 3... Chart paper, 4...
...Electromagnet, 5...Magnetic piece, 6...Movable holder, 6
b... Engaging portion, 7... Recording needle, 9... Electromagnetic coil, 10, 11... Pole plate, 10b... Regulating portion.

Claims (1)

[Scope of claim for utility model registration] An electromagnet that is turned on and off by energizing and cutting off the energization to the electromagnetic coil, a movable holder having a magnetic piece that is attracted to the pole plate of the electromagnet, and a recording needle attached to the movable holder. In an electromagnetic recording device for a driving recorder, which records the operating status of various devices on a chart paper by turning on and off an electromagnet, the electrode plate is engaged with a part of a movable holder to change the movable range of the movable holder. 1. An electromagnetic recording device for a driving recorder, characterized in that a regulating section is provided to regulate the position of the recording needle when the electromagnet is turned on or off, and the regulating section determines the position of the recording needle when the electromagnet is turned on or off.