JPH0210393B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a clock, particularly a tower clock installed outdoors.
Concerning large clocks such as flower clocks.

An example of the structure of a conventional large-sized clock is shown in FIGS. 1 and 2, where 1 shows a long hand, 2 shows a short hand, and 3 shows a dial that displays the time. The long hand 1 and the short hand 2 have rotating shafts 4 and 5 coaxially and rotatably arranged, respectively.
are fixed to each end of the rotary shafts 4 and 5, and are connected to each other via a gear mechanism 6 provided on each rotating shaft 4 and 5, and driven by a drive motor 7. That is, a gear 8 is mounted on the rotation shaft 5 of the hour hand 2;
Gears are attached to the rotating shafts 4 of the long hand 1 passing through the interior, and these gears 8 and 9 are connected to gears 11 that are integrally attached to separate rotating shafts 10.
and 11 are interlocked. Gear 8 and Gear 1
1 is formed so that the ratio of the rotational speeds is 1:4, and the gear 9 and the gear 12 are formed so that the ratio of the rotational speeds is 3:1. Note that 16 is a guide for the rotating shaft. In this configuration, the rotational force of the drive motor 7 is transmitted to the rotating shaft 4 of the long hand 1 via the worm gear mechanism 13, and the gear 9 - gear 12 -
The information is transmitted to the rotating shaft 5 of the short hand 2 via the rotating shaft 10, gear 11, and gear 8, thereby causing the long hand 1 and the short hand 2 to
and are rotated with a rotation speed ratio of 1:1/12. Further, in this case, weights 14 and 15 are provided so that the long hand 1 and the short hand 2 can be stopped in a well-balanced manner at predetermined rotational positions depending on the time.

In this way, in the conventional large watch, the rotational force of the drive motor 7 is transmitted to the respective rotating shafts 4 and 5 via the gear mechanism 6 including the worm gear mechanism 13 to drive the long hand 1 and the short hand 2. Moreover,
At the rear ends of the long hands 1 and 2 are weights 14 for balance,
15, there is a limit to the length of the minute hand 1, and therefore, even though it is a large watch, there is a limit to its size. Moreover, it was also structurally complex.

The present invention solves the above-mentioned problems, has a simple structure, and solves the above-mentioned problems, has a simple structure,
In addition, the present invention provides a new timepiece that enables construction of a large timepiece of any size, especially a large timepiece that can be installed at any angle including vertically.

In the present invention, a long hand and a short hand are interlocked with each other via a rotating shaft, an annular guide plate that guides the long hand, and a drive source provided on the long hand, and a chain or short hand is provided over the entire periphery of the side surface of the guide plate. Similar to this, a so-called chain-like body is wound and fixed, a chain sprocket connected to a drive source is engaged with the chain-like body, and the long hand is directly driven by this drive source. According to this invention, since the long hand is supported by the rotating shaft and the guide plate, the long hand can be formed to have an arbitrary length. In particular, the engagement between the chain-like body and the chain sprocket ensures that the long hand remains stationary, allowing the large watch to be installed at any angle, including vertical installation. Furthermore, since the long hand is also directly driven, the driving force is smaller than in the past, and the structure is also simplified. Therefore, large tower clocks, flower clocks, etc. can be easily constructed.

Next, an example of a timepiece according to the present invention will be explained in detail using FIG. 3 and subsequent figures.

In this example, as shown in FIGS. 3 and 4, a long hand 21 and a short hand 22 are provided, and the short hand 22 is the first
The long hand 21 is fixed to the rotating shaft 24 of the first
The second shaft passes through the rotating shaft 24 of the
It is fixed to the rotating shaft 23 of. Both rotating shafts 23 and 24
are connected to each other via a gear mechanism 31. That is, a gear 25 is mounted on the first rotating shaft 24, and a gear 25 is mounted on the first rotating shaft 24.
A gear 26 is mounted on the rotating shaft 23 of the rotary shaft 23, a gear 26 is mounted on the second rotating shaft 23, and each gear is mounted on the third rotating shaft 28 with both gears 25 and 26 disposed on a support 27, respectively. 29 and 30. The gear 29 is formed to have a rotation speed ratio of 1:4, and the gear 26 and the gear 30 are formed to have a rotation speed ratio of 3:1. In addition, the long hand 21
An annular guide plate 32 is arranged on the outer periphery of the short hand 22. In this example, the guide plate 32 is formed at a position where the tip of the long hand 21 is guided. A driving source for directly driving the long hand 21, in this case, for example, a driving motor 33, is fixed on the tip of the long hand 21. On the other hand, the side surface of the guide plate 32, in this example, the guide plate 32
A chain 60 is wound and fixed around the entire circumference of a side plate portion 32a that is integrally provided on the back surface of the side plate portion 32a. Then, the shaft of the motor 33 is passed through the back side of the long hand 21, and a rotatable chain sprocket 61 is integrally attached to the tip thereof.
is engaged with the chain 60 fixed to the guide plate 32 (see FIG. 5). That is, this chain sprocket 61 is moved by the motor 33 to the chain 6.
The long hand 21 is configured to be directly driven by rotationally moving while meshing with zero. This guide plate 32 can also serve as a dial indicating the time, if necessary.

The long hand 21 is divided into two parts in the middle as shown in FIG. 6, and a spring 62 is interposed between the two parts 21A and 21B so that the long hand 21 can follow any contour shape of the guide plate 32 well. It is formed so that it can be expanded and contracted in the longitudinal direction. in this case,
One of the members 21A and 21B is provided with a long hole, and the other is provided with an engaging pin 64 that is engaged and guided by the long hole 63 to connect the two members.

A control circuit 36 is disposed on the minute hand 21 to drive and stop the motor 33 in accordance with the time. The control circuit 36 includes, for example, a pulse generator 41 that generates a pulse once per minute, as shown in FIG. Stop switch means 44 for stopping the motor 33
It has. According to this control circuit 36, the motor starting relay circuit 42 is activated by the pulse from the pulse generator 41, and then the holding circuit 43 is activated to drive the motor 33, and the long hand 21 corresponds to one minute. After the motor 33 has moved by a certain distance, the stop switch means 44 is actuated to release the holding circuit 43 and the motor 33 is stopped. In this example, as the stop switch means 44, a fixed disk 66 is attached to the tip of a fixed shaft 65 arranged so as to pass through the second rotating shaft 23 and extend onto the long hand 21. Sixty notches 67 are provided at equal angular intervals around the entire circumference of the fixed circle 66, and a light emitting element 68 and a light receiving element 69 are arranged above and below the fixed circle 66, respectively. When light from the light emitting element 69 is detected by the light receiving element 69 through the notch 67, the holding circuit 43 is controlled by the detection output. The control circuit 36 is normally connected to an AC power source, but if necessary, it can also be operated by directly supplying pulses from the master clock. The control circuit 36 is energized or pulsed through a lead wire 47 inserted through the rotating shaft 23 of the long hand 21. One end of each lead wire 47 is connected to a slip ring 48 attached to the lower end of the rotating shaft 23. In this case, the slip ring 48 has four ring conductors 49a, 49b, 49C and 49d, and each of the ring conductors 49a to 49c is brought into sliding contact with contact pieces 50a, 50b, 50c and 50d supported on the support 27, respectively. . The AC power terminal _t1 is led out from the contact pieces 50a and 50b, and the contact pieces 50c and 5
From 0d, a pulse input terminal _t2 from the master clock is derived.

Next, the operation of this configuration will be explained. When the motor 33 on the minute hand 21 is driven by the control circuit 36, the chain sprocket 61 is activated accordingly.
is driven on the guide plate 32 while meshing with the chain 60. As a result, the long hand 21 itself moves to the rotation axis 2.
3, it rotates along the guide plate 32. Due to this rotational movement of the long hand 21, the rotational force is
8-gear 29-gear 25-transmitted to rotating shaft 24,
The short hand 22 rotates. Then, the long hand 21 is 1
When the light emitting element 68 and the light receiving element 69 come to the position corresponding to the notch 67 of the fixed disk 66 after moving a distance corresponding to 1 minute, the reed relay 46 is activated and the motor 33 is stopped. This operation is repeated every minute, and one rotation of the long hand 21 causes the short hand 22 to rotate 1/12,
The time will be displayed.

In addition to the motor 33 described above, the driving source may be, for example, compressed air, hydraulic pressure, magnetism, wind power, or the like.

Further, in the above example, the guide plate 32 is provided at the tip of the long hand 21, but it is also possible to arrange the guide plate 32 so as to correspond to the intermediate position of the long hand 21.

According to the above-described configuration, the long hand 21 is connected to the rotating shaft 23.
Since the long hand 21 is supported by the guide plate 32, it is possible to form the long hand 21 to any desired length. Moreover, since the long hand 21 is directly driven by the driving motor 33 disposed on the long hand 21, the long hand 21 can be rotated smoothly.
Further, the driving force is small and the structure is extremely simplified compared to the conventional one.

In particular, since the chain sprocket 61 directly connected to the shaft of the drive motor 33 engages with the chain-like body 60 disposed on the side surface of the guide plate 32 and drives the outer circumference of the guide plate 32, the rotational movement of the long hand 21 and the rotational movement of the long hand 21 and the rotational movement of the long hand 21 at a predetermined position are performed. Standstill is ensured. Therefore, vertical installation is possible even when the device is extremely large. Of course, installation at other predetermined inclination angles is also possible. In addition, since the long hand 21 can be expanded and contracted in the longitudinal direction, it is possible to drive the watch even if the dial, which also serves as a guide plate, has various contour shapes, increasing the degree of freedom in the design of the watch. As described above, the present invention allows large-sized clocks to be easily produced, making it suitable for application to various clocks such as tower clocks and flower clocks.

[Brief explanation of drawings]

1 and 2 are a plan view and a side view thereof showing a conventional timepiece, FIGS. 3 and 4 are a plan view and a partially sectional side view thereof showing an example of the timepiece of the present invention, and FIG. 6 is a plan view of the minute hand, and FIG. 7 is a control circuit diagram for explaining the present invention. 21 is a long hand, 22 is a short hand, 23 and 24 are rotating shafts, 31 is a gear mechanism, 32 is a guide plate, 33 is a motor, 60 is a chain-shaped body, and 61 is a chain sprocket.

Claims (1)

[Claims] 1. It has a long hand and a short hand that interlock with each other via a rotating shaft, an annular guide plate that guides the long hand, and a drive source provided on the long hand, and a chain-shaped body is provided around the entire side surface of the guide plate. A timepiece comprising a chain sprocket which is wound and fixed and is connected to the drive source and is meshed with the chain-shaped body.