JPS5817414B2 - Recording paper drive device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for recording paper, etc., for recording the internal temperature of a marine refrigerated/freezer container.

In marine refrigerated and frozen containers, the internal temperature is recorded by a disc-shaped recorder installed in each container, and it is determined whether the internal temperature is maintained at the correct set temperature.

This recorder makes one revolution every 31 days and can record for one month, but since it is necessary to record the period of land transport or storage without power, a mainspring is used to drive the recording paper, and a mechanical pen is used for writing. It is said that

However, in the conventional type, winding of the mainspring was done manually, which resulted in accidents such as forgetting to wind it or overwinding the mainspring, which caused the mainspring to break, making it impossible to record.

For this reason, it is conceivable to use a battery as a drive source instead of a mainspring, but in this case, the operating environment is harsh, so the battery life will be shortened, and it will be difficult to judge when to replace the battery based on its quality. There are problems with maintenance and reliability, such as electrical discharge accidents when storing spare parts.

The present invention has been made in view of the above circumstances, and its purpose is to provide a recording paper drive device that can reliably wind the mainspring and prevent the mainspring from breaking due to forgetting to wind it or overwinding it. .

That is, the present invention includes a manual winding mechanism for a recording paper drive mainspring, an automatic winding motor connected to the mechanism by a gear train having a ratchet mechanism, and a winding start position and a winding end position each detected by the motor. In the recording paper 1 driving device, the motor is controlled to be driven and stopped based on the detection signal of the detector, and the motor is rotated in accordance with the amount of winding of the mainspring and the amount of loosening of the mainspring. and a disc body screwed onto a threaded rod that is moved by the rotation of the gears, and the position of the disc body is detected by the detector to control the motor. This is a recording paper drive device characterized by:

An embodiment of the present invention will be described below based on the drawings.

Figure 1 is a block diagram of the recording paper drive device, and this device includes:
A motor 1 connected to a power source is connected to a mainspring box 3 via a gear train 2 having a ratchet mechanism, and the mainspring box 3 is driven by the motor 1.

The mainspring drive shaft provided in the mainspring box 3 is connected to the speed governor 4
It is connected to a recording paper base 6 via a gear train 5 whose speed is controlled by , and rotates the recording paper base 6 at a constant speed.

Furthermore, a manual winding mechanism 7 is connected to the gear train 2, so that the mainspring box 3 can be manually wound.

Further, a winding amount detector 8 is attached to the mainspring box 3, and the motor 1 is driven based on this detection signal.

To explain in more detail based on FIG. 2, the motor 1 is provided with a gear 9 on the motor shaft 1a, and the gear 9 is connected to the shaft 1.
It meshes with the gear 11 provided at 0.

Further, a gear 12 provided on the same shaft 10 as the gear 9 meshes with a gear 14 provided on the winding shaft 13.

This shaft 13 includes the manual winding mechanism 7 and the ratchet mechanism 15.
is provided so that when the winding shaft 13 is rotated, the ratchet pawl of the ratchet mechanism 15 and the ratchet gear become out of mesh, so that no rotational force is transmitted to the gear 14.

Another gear 16 provided on the father's stock raising shaft 13 meshes with a gear 18 provided on the mainspring box 3.

The mainspring drive shaft 17 is in a rotatable relationship with the gear 18, one end of the mainspring is attached to the mainspring drive shaft 17, and the other end of the mainspring is attached within the mainspring box 3.

The mainspring can be wound by turning the winding shaft 13.

Furthermore, gears 19 and 20 are provided on the mainspring drive shaft 17, and one gear 20 meshes with a gear 22 provided on the shaft 21.

This shaft 21 is provided with gears 23 and 24.
is connected to the speed regulating mechanism 4.

The gear 24 meshes with a gear 26 provided on a shaft 25, and another gear 27 provided on this shaft 25 meshes with a gear 29 provided on a recording paper shaft 28.

The recording paper base 6 is attached to the tip of the recording paper shaft 28, and the recording paper is mounted here.

On the other hand, another gear 19 provided on the mainspring and drive shaft 17 meshes with a gear 32 provided on one end of the threaded rod 31.

A disc body 33 is screwed onto the threaded rod 31, and a gear 34 that meshes with the gear 18 is provided at the other end of the threaded rod 31 so as to be rotatable with respect to the threaded rod 31.

A guide pin 35 is provided protruding from this gear 31, and this guide pin 35 is inserted through the disk body 33.

The disk body 33 has a guide pin 3 that rotates the threaded rod 31.
It moves in the direction of arrow A or B by the rotation of 5.
With this movement, it comes into contact with and separates from the winding amount detector 8, which is a microswitch.

This winding amount detector 8 turns the power supply of the motor 1 to 0N-O.
The winding start position a is a position where the disc body 33 is separated from the detector 8, and when the disc body 33 moves to this position, the motor 1 is driven.

Further, the winding end position is a position where the disc body 33 comes into contact with the detector 8, and when the disc body 33 moves to this position, the drive of the motor 1 is stopped.

In this case, the winding start position a is set such that the mainspring 3 has a spring force capable of rotating the recording paper base 6 for the remaining 7 days, and the winding end position is set such that the mainspring 3 has a spring force capable of rotating the recording paper base 6 for the remaining 7 days. It is set to have one driving force that can be turned.

In the figure, 36 to 38 are bearing plates, and 39 is a reverse rotation prevention mechanism provided on the winding shaft 13.

Next, the operation of the recording paper drive device configured as described above will be explained.

When power is supplied to the marine refrigerated/frozen container and the motor 1 is driven to rotate, the gears 9 and 11, the shaft 10, and the gears 12 and 14
During winding, the mainspring box 3 is rotated via the shaft 13 and the gear 16.degree. 18, and the mainspring is wound up.

Further, the gear 18 rotates the gear 34 times, and the rotation of the guide pin 35 of the gear 34 causes the disc body 33 to move in the direction of arrow B while rotating around the threaded rod 31. At the winding end position, the winding amount detector is detected. Press 8 to stop motor 1 from rotating.

The return force of the mainspring is then transmitted to the gears 20, 22, the shaft 21, the gears 24, 26, the shaft 25, the gears 21, 29, and the shaft 28 to rotate the recording paper table 6.

In this case, the recording paper table 6 rotates once every 31 days.

When the mainspring returns, the mainspring drive shaft 17, gear 19, gear 32, and threaded rod 31 rotate, and the disc body 33 moves in the direction indicated by the arrow.

When the disk body 33 reaches the winding start position a, the winding amount detector 8 is separated and turned ON, and the motor 1 is driven by 1.

In this way, however, the mainspring is automatically wound up by the motor 1.

Note that the mainspring can be manually wound by rotating the winding shaft 13.

In this case, the ratchet pawl of the ratchet mechanism 15 and the ratchet gear are out of mesh, and no rotational force is transmitted to the gear 12.

According to the above embodiment, the winding amount of the mainspring is detected by the winding amount detector 8, and the mainspring can be automatically wound based on this detection signal, thereby preventing forgetting to wind or overwinding as in the conventional case. The recording paper is reliably driven without any problems.

Also, like when transporting containers by land, they are powered by a mainspring for at least seven days without power.

In this case, the land transportation period is usually about a few days, so there is no need to manually wind the mainspring.

Furthermore, since the mainspring can be wound appropriately, the mainspring can be made smaller and can be driven with a small amount of power.

As explained above, according to the present invention, since the mainspring is rotated by a motor instead of manually, it is possible to prevent forgetting to wind or overwind, and by setting the winding start position appropriately, the power to the motor can be turned off. The mainspring operates for a certain period of time even in the state, and is particularly suitable as a drive device for recording paper that records the internal temperature of containers such as maritime refrigerated and frozen containers that normally have power but are turned off during transportation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a recording paper drive device showing one embodiment of the present invention, and FIG. 2 is a system diagram of the same drive device. 1...Motor, 2...Gear train, 3...
...Spring box, 5...Gear train, 6...
... Recording mount, 8... Winding amount detector, 15.
...Ratchet mechanism, 31...Threaded rod,
32...Gear, 33...Disc body, 34
...Gear, 35...Guide pin.

Claims (1)

[Scope of Claims] 1. A winding mechanism for manually winding a mainspring for driving a recording paper, an automatic winding motor connected to the mechanism by a gear train having a ratchet mechanism, and a winding start position and a winding end position by the motor. In the recording paper drive device, the recording paper drive device is equipped with a detector for each detection, and the motor is controlled to drive and stop based on the detection signal of the detector. and a disc body screwed onto a threaded rod driven by the rotation of the gears, and the position of the disc body is detected by the detector to control the motor. A recording paper drive device characterized by: 2. Claim 1, in which the winding start position of the winding mechanism is set at a position where the driving force of the mainspring remains.
Recording paper drive device described in Section 1.