JPH05119728A - Hoisting device for national flag, etc. - Google Patents

Abstract

PURPOSE:To correctly decide a hoisting position and a lowering position by taking the distance between a pulley and a drum sufficiently large, also providing a projection in an inner side of a flange and forming winding structure by which a rope is always wound around the drum lined up. CONSTITUTION:An inclined angle phi of the direction which the rope 2 going to be wound around the drum 5 extends to the pulley 4, is always kept smaller than a winding lead angle theta of the rope 2 on the drum 5, so a wound part of the rope 2 is pressed to a side part of a part which was wound before one turn. Hence a tightly wound state can be secured. Also when the rope 2 is wound till the edge of the drum 3, the rope 2 is pressed in the reverse direction by the projection 11. Then the rope 2 is wound forward in the reverse direction without being piled up along the flange 9 inner face. Like this a tightly winding and a winding being fold the edge are surely carried out, so the lined-up winding is always guaranteed, if it is wound at any use state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flag display device for hanging a rope having a flag tied at one end on a pulley provided at the crown of a pole and winding the other end of the rope with a drum. The purpose is to ensure that the rope is aligned and wound around the drum.

[0002]

2. Description of the Related Art The applicant of the present invention has invented a device for automatically displaying a national flag on a pole as shown in FIG. This is a pulley (4) in which a rope (2) having a weight (1) fixed at one end is attached to the crown of a pole (3).
It is constructed so that it is hung on the drum (5) from the other end side, and the flag (6) is tied to one end of the rope (2),
By rotating the drum (5) forward and backward by the motor drive mechanism (7), the national flag is displayed and paid off. A rope (2) is attached to the tip of the rope (2) together with the weight (1) so as to be wound around the pole (3).
For displaying and delivering, it is necessary to position the national flag (6) at a predetermined height with respect to the pole (3).

Therefore, in the motor drive mechanism (7),
In the middle of the gear mechanism that transmits the rotation from the motor to the drum,
A limit switch equipped with a gear-type counter is provided, and when the count number exceeds a set upper limit value or falls below a set lower limit value, the output contact is turned off to stop the motor. In other words, the position of a raised object such as a national flag is determined by detecting the amount of rotation of the drum (5) with a gear type counter of a limit switch and indirectly controlling the length of the rope.

[0004]

The positioning control in the above-mentioned flag raising device is based on the premise that the rotation amount of the drum (5) and the feeding length of the rope (2) have a one-to-one correspondence. ing. This is obtained in a state in which the rope (2) is wound around the drum (5) in an aligned manner as shown in FIG. 8, and if winding disorder occurs as shown in FIG. Compared to the above, the positioning control cannot be performed accurately. Such winding disorder often occurs when the winding operation is performed with the tension of the rope reduced. This is, for example, when the rope (2) is once taken out from the drum (5) because the national flag or the like is entangled in the pole (3) and is wound up before the rope (2) is stretched by the weight (1). is there.

The winding disorder shown in FIG. 9 is likely to appear because the winding of the first layer is performed directly on the flat outer peripheral surface of the drum, unlike the winding of the second and subsequent layers having the aligned winding layer below. If such a winding disorder first occurs due to a phenomenon, it is naturally impossible to perform the aligned winding even in the two or more layers.

The winding disorder shown in FIG. 10 is a phenomenon in which the rope (2) to be wound back and forth between the ends of the drum (5) is not inverted at one end and is overlapped at the flange position and wound. It occurs in the form of being guided and supported by the inner surface of the flange when the direction of the rope that has reached one end to the pulley is substantially parallel to the inside of the flange.

If such a winding disorder occurs, the flag cannot be displayed and evacuated to the correct position, and at the same time the flag is damaged or the motor of the motor drive (7) is burned out. May occur.

This will be described in detail. If there is winding disorder, more rope is wound than the number of rotations of the drum, so it was judged that the limit switch reached the upper limit position even when the flag (6) reached the position of the pulley (4) during winding. No, the motor continues to rotate. Therefore, the national flag (6) is caught in the pulley (4) and restrains the winding of the rope around the drum. Then, the motor enters an overload state in which it does not rotate while receiving power, and eventually burns out.

Therefore, an object of the present invention is to provide a winding structure in which a rope is always wound around a drum in a line so that a hoisting position and a unloading position can be accurately determined.

[0010]

According to the present invention, a rope having a display such as a national flag and a weight attached to one end is hung on a pulley provided at the crown of the pole, and the other end of the rope is arranged at the base of the pole. By winding and unwinding with a drum,
In a hoisting device for hoisting and unloading, by sufficiently increasing the separation distance between the pulley and the drum, the winding lead angle θ of the rope on the drum determined by the drum diameter and the rope diameter.
Compared to, the angle of inclination φ in the direction in which the rope extends from the winding position on the drum to the pulley is always small, and the flag that pushes the rope that has reached the flange positions on both sides of the drum back to the inside is provided. To provide a hoisting device. The protrusion may be provided on the flange of the drum or on the support frame of the drum.

[0011]

In the above construction, the inclination angle φ of the rope being wound on the drum in the direction in which the rope extends to the pulley is always kept smaller than the winding lead angle θ of the rope on the drum as shown in FIG. As shown in the figure, the wound part of the rope is pressed against the side part of the part wound one turn ahead. Therefore, the tightly wound state can be secured.

When the rope is wound up to the end of the drum, the rope is pushed in the opposite direction by the protrusion as shown in FIG. Therefore, the rope is wound in the opposite direction as shown in FIG. 8 without overlapping along the inner surface of the flange.

Since the close winding and the end turn-back winding are surely performed in this manner, the aligned winding is always guaranteed regardless of the use condition.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is a device for displaying national flags and the like shown in FIG. 7, in which the distance between the pulley (4) provided on the crown of the pole and the drum (5) provided on the base of the pole as shown in FIG. L
Is sufficiently larger than the winding width l, the drum diameter R, and the rope diameter a of the drum (5), and the protrusions (11) are provided inside the flanges (9) on both sides of the drum. ing.

The criteria for determining the separation distance L between the pulley (4) and the drum (5) will now be considered. The minimum value of the winding lead angle θ of the rope wound on the drum shown in FIG. 1 is D for the winding portion of the drum (the outer shape including the rope when the rope is wound in the maximum amount), and the diameter of the rope is a. Then tan θ ≒ a / πD
Is expressed as

Also, the maximum value of the inclination angle φ of the rope extending from the drum (5) to the pulley (4) is when the winding is performed at the end of the drum, and the width of the winding portion of the drum is l. Then, tan φ ≈ 1 / 2L is expressed, so φ <
To obtain θ, 1 / 2L <a / πD is required.

The difference between the inclination angle θ and the winding lead angle φ is set to be sufficiently large to ensure that the winding overlaps with one side of the rope wound one turn ahead. There is a need. In addition, since the height of the pole (3) and the rope diameter a are first determined in practice, the size and shape of the drum (5) are determined accordingly.

Next, the height h of the protrusions (11) provided on the flanges (9) on both sides of the drum will be described. As shown in FIG. 10, the state in which the rope is rolled up in a row along the flange (9) is unstable, and if the rope is pushed inside the flange with a slight force, the rope will be reversed. The thickness h may be about 1/3 to 1/2 of the rope diameter a. This protrusion (1
1) may be provided in an annular shape over the entire circumference of the flange,
As shown in the figure, a plurality of ridge projections has the advantage of being easier to manufacture in terms of molding work.

Next, an embodiment of the motor drive mechanism (7) for the drum (5) will be described. 3 and 4, (12) is a frame, (13) is a motor fixed to the frame, and (14) and (15) are first and second rotating shafts.
(16), (17) and (20) are spur gears, and (18) and (19) are worm gears and worm wheels, which are attached to the output shaft of the motor and the rotary shaft. (21) is a torque transmission gear that is a spur gear, and (5) is the drum that receives a rotational force from the torque transmission gear (21). (22) is a counter type limit switch, and a worm wheel (23) provided on its input shaft is meshed with a worm gear (24) mounted in the middle of the first rotating shaft (14). In addition, (25) (26) (2
7) is a push button type up switch, a down switch, and a stop switch, and (R1) and (R2) are first and second output relays.

In this structure, the rotation of the motor (13) is transmitted to the torque transmission gear (21) via the first rotation shaft (14) and the second rotation shaft (15), and the torque transmission gear (21) is transmitted. The drum (5) is rotated by the torque transmission gear (2
A mechanism is provided between the drum (5) and the drum (5) to idle the torque transmission gear (21) when a certain load is applied. The drum (5) winds and unwinds the rope in accordance with the forward and reverse rotations of the motor (13). This rotation is monitored by the gear type counter of the limit switch (22), and the winding amount (at the time of hoisting) When the delivery amount (at the time of delivery) reaches the set value, the power supply to the motor (13) is stopped. That is, the limit switch (22) has its input shaft (22
Two gear type counters for counting the number of rotations of a) are provided for the upper limit and the lower limit, for example, when the counter has four digits,
The operation switches (F1) and (F2) shown in FIG. 5 are provided for turning on / off the movement of each digit of the numeral wheel which moves up from 9999 to 0000 all at once. Therefore, when the national flag is in the hoisting position, press the reset lever (30) for the upper limit counter, and when it is in the delivery position, press the reset lever (31) for the lower limit counter to display the respective displays.
Set to 0000. In this state, the switch of each counter is OFF
Then, the power supply to the motor (13) is stopped. The upper limit counter, when the drum (5) rotates in the line-feeding direction from this, lowers the digit to 9999, further decreases the count value, and turns on the switch (F1). When the drum (5) further rotates in the winding direction of the rope, the lower limit counter lowers the digit to 9999, further decreases the count value, and turns on the switch (F2). With these switches (F1) (F2),
As shown in the figure, the motor control circuit (32) is configured.

This control circuit, when the up switch (25) or the down switch (26) is pushed, the first output relay (R1)
Alternatively, when the second output relay (R2) is excited to rotate the motor (13) forward or reverse while holding itself, the limit switch switches (F1) and (F2) are used to reach the hoisting position or the delivery position. Motors self-holding off (13)
Is to stop. The emergency stop is performed by pushing the stop switch (27) to release the self-holding state.

Further, the protrusion (11) for pushing inward the rope that has reached the flange position of the drum (5) during winding is shown in FIG.
It may be provided on the support frame side of the drum (5) as shown in FIG. The protrusion (11 ') of the embodiment shown in FIG. 6 is formed by bending one end of a support frame (12) for rotatably supporting the drum (5) so as to be substantially parallel to the winding surface of the drum. The protrusion height h of the flange (9) with respect to the inner surface is determined so as to have the above-mentioned value, and the edge thereof is R-face processed.

The hoisting device of the present invention can be applied to all hoisting devices such as a windsock on a pole in addition to the national flag.

[0024]

According to the present invention, it is possible to ensure that the rope is wound around the drum in a lined manner, and the positioning control for displaying and unloading a national flag or the like can be accurately performed. Therefore, an accident such as the national flag being caught in the pulley is prevented, and the national flag and the like are prevented from being damaged and the motor is prevented from being burned.

[Brief description of drawings]

FIG. 1 is a view showing a state in which a rope extending on a pulley, which is an essential part of the present invention, is wound up by a drum.

FIG. 2 is a view showing a state in which a rope is wound around one end of a drum.

FIG. 3 is a plan view of a motor drive mechanism.

FIG. 4 is a side view of the motor drive mechanism.

FIG. 5 is a motor drive circuit diagram.

FIG. 6 is an enlarged view of a drum portion showing another embodiment of the protrusion of the present invention.

FIG. 7 is an overall configuration diagram of a flag display device according to an embodiment of the present invention.

FIG. 8 is a view showing a state in which a rope is wound around a drum in an aligned winding state.

FIG. 9 is a diagram showing a state in which a rope is wound around a drum in a disorderly winding state.

FIG. 10 is a view showing a state in which a rope is wound around a drum in a disorderly winding state.

[Explanation of symbols]

 1 Weight 2 Rope 4 Pulley 5 Drums 11 and 11 'Projection L Distance between drum and pulley 1 Drum winding width D Drum winding diameter θ Winding lead angle φ Inclination angle of rope from drum to pulley

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Hattori 2-1-1 Sonezaki, Kita-ku, Osaka City, Osaka Prefecture Hokuyo Electric Co., Ltd.

Claims (2)

[Claims] 1. A rope with a flag or the like attached to one end and a weight is hung on a pulley provided at the crown of the pole, and the other end of the rope is wound and unwound by a drum arranged at the base of the pole. Therefore, in the hoisting device for hoisting and unloading, by sufficiently increasing the separation distance between the pulley and the drum, the rope is The national flag is characterized in that the inclination angle φ in the direction extending from the winding position on the drum to the pulley is always made small, and the protrusions that push the rope wound on both sides of the drum inward are provided inside the flanges on both sides of the drum. Equipment for hoisting etc. 2. A rope with a national flag or the like and a weight attached to one end is hung on a pulley provided at the crown of the pole, and the other end of the rope is wound and unwound by a drum arranged at the base of the pole. Therefore, in the hoisting device for hoisting and unloading, by sufficiently increasing the separation distance between the pulley and the drum, the rope is The inclination angle φ in the direction extending from the winding position on the drum to the pulley is always made small, and the protrusions that push the rope that has reached the flange positions on both sides of the drum inward during winding are provided on the drum support frame. A device for displaying characteristic national flags.