JPH0244760B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hoisting machine suitable for use in hoisting and unwinding ropes, tents, etc.

(Problems to be solved by conventional technology and invention) Winding up and unwinding of ventilation window vinyl, sunlight shielding curtains, etc. in ordinary professional greenhouses, large greenhouses, etc. is a continuous process of 50 to 100 meters. ridge greenhouse,
In a large greenhouse, vinyl curtains are rolled up every 20 to 30 meters and wrapped around an iron pipe shaft, and a winding machine is installed in front of or in front of the shaft.

Since such winding and unwinding requires considerable work, various improvements have been made in the past.

Conventional small worm reducers are very good at preventing reverse rotation, but the rotation speed of the handle is too high for continuous use, and for those that do not carry a large load, there are some that do not require reduction, and are instead directly connected to the shaft. In many cases, those that are easy to work with are preferred. Moreover, it has been devised and invented exclusively for this purpose. However, with devices that use a pawl or ratchet wheel to stop the load from rotating, when the pawl is removed, the load suddenly applies to the handle, which is undesirable. Most of the reverse rotations are free. Therefore, for example, if the greenhouse is installed on the right side and left side, the hoisting rotation direction will be reversed.
It is necessary to install the pawl wheel in the opposite direction, but due to the worker's habit, when the pawl is removed, if a load is suddenly applied that rotates in the opposite direction, it may cause confusion and difficulty, so care must be taken when working. There were many inconveniences.

The present invention has been made to solve the above problems, and a brake is applied to the rotation of the load from the load shaft in either direction, and from the handle drive shaft side, the brake is applied to the rotation of the load from the load shaft in either direction. To provide a hoist that can operate in the rotational direction of a handle without applying a sudden load to the rotational direction of the handle.

(Means for Solving the Problems) According to the present invention, in a hoisting machine that performs hoisting and unwinding control from a drive shaft 4 to a load shaft 3 connected to a winding drum, the load shaft and the drive shaft are arranged in one axis. A non-rotating cylinder 1, which is connected and supported by male and female shafts so as to be rotatable with each other, and has a friction plate bonded to its inner surface; A pair of side clamping plates 7 are sandwiched with a non-rotatable play of at least 90 degrees with respect to the load shaft; a flat band spring 9 that comes into pressure contact with the inner surface friction plate of the non-rotating cylinder when they are separated by rotation of the load shaft; and a flat band spring 9 formed to protrude from the side clamping plate along both side surfaces of the flat rectangular portion of the load shaft. When the drive shaft rotates, a side clamp is formed between a pair of side clamping plate ears 8 and a flat rectangular portion of the load shaft that is fixed to the drive shaft so as to rotate the load shaft from the outside of these side clamping plate ears. It is possible to provide a hoist characterized by having a driving force transmitting member 10 that grips and holds the plates with a play that cannot be rotated by more than 90 degrees with respect to the side nipping plate lugs where the plates are separated from each other at a maximum distance.

(Function) In the hoisting machine of the present invention, when a load is applied to the load shaft 3 through a direct connection or a shaft joint, the rectangular portion of the load shaft 3 is connected to the side clamping plate 7 and the side clamping plate for both rotations. The ears 8 are pushed apart, and a force in the expansion direction is applied to the upper end of the side clamping plate 7 and the end of the flat band spring 9 fixed thereto, and the flat band spring 9, which is in close contact with the inner surface of the cylinder 1, is strongly applied to the entire inner surface of the cylinder. Force is applied in the direction of the outer surface. Therefore, it becomes impossible to rotate due to friction with the inner surface of the cylinder, and by increasing the ratio of the diameter of the rectangular portion to the diameter of the flat band spring 9, the load axis is integrated with the rectangular portion for both rotations. 3 does not rotate.

On the other hand, when a rotational force is applied to the drive shaft 4 by an external force from a handle or the like, if the drive force transmission member 10 fixed to the drive shaft 4 rotates, the side clamping plate lug 8 is attached to the drive force transmission member 10. The flat band spring 9 is compressed by being rolled up, and the upper end of the side sandwich plate 7 and the flat band spring 9 are compressed.
The distance between the two ends and therefore the outer diameter of the flat strip spring 9 is slightly reduced, the friction with the inner surface of the cylinder is reduced, and the side clamping plate 7 has a rotational position deviation within 90 degrees from the driving force transmission member 10. The load shaft rotates while contacting both sides of the rectangular section. Therefore, the load shaft 3 including the rectangular portion sandwiched between the side clamping plate 7 and the side clamping plate lug 8 is rotated in the rotational direction by the rotational force from the drive shaft 4.

In this way, in response to the rotational force from the load shaft 3 side, the brake is applied and rotation is stopped, and in response to the rotational force from the drive shaft 4 side, if the driving force exceeds the load force, the braking action is released and the load is The shaft 3 can be rotated.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

1 to 3 are a longitudinal cross-sectional view, a cross-sectional view taken along the line A--A, and a perspective view of essential parts of a brake mechanism using a flat band spring, showing one embodiment of the present invention.

In FIG. 1, a friction plate 2 is bonded to the inner surface of a cylindrical box 1. A shaft supported by a bearing at the center of each of the bottom plate and the lid of the cylindrical box 1 is divided into two parts from the center of the shaft inside the cylindrical box 1, one of which is a load shaft 3 and the other is a drive shaft 4, which is a shaft that is connected to the cylindrical box 1. Furthermore, the tip of the load shaft 3 extends its core shaft 5 to form a male and female shaft passing through the drive shaft 4, and both shafts 3 and 4 are rotatable relative to each other on one axis. are combined.

Of these, the load shaft 3 has a rectangular shape from the bearing part to the inside of the cylindrical box 1 toward the center of the shaft, and the tip of this rectangular part 6 is formed into a male and female shaft passing through the drive shaft 4. has been done.

Reference numeral 7 designates two side plates that face each other in the rectangular portion 6 and are substantially orthogonal to the axial direction of the rectangular portion 6. This side clamping plate 7 has side clamping plate ears 8 that protrude along the axis with the side surfaces of the rectangular portion 6 interposed therebetween. The lower ends of these side clamping plates 7 are connected to each other so that the upper ends of the side clamping plates 7 can be expanded and contracted freely, and the facing side clamping plates 7 are not displaced from each other in the vertical direction. In addition, the center portions of these side clamping plates 7 sandwich the flat rectangular portion 6 of the load shaft 3 with their palms together with a predetermined play.As will be described later, this play is caused by the side clamping of the load shaft 3. It is set so that it cannot rotate by at least 90 degrees or more with respect to the plate 7.

The upper ends of the two side sandwiching plates 7 are connected to the cylindrical box 1.
They are fixed to both ends of a flat band spring 9 that extends outward along the inner surface, and this flat band spring 9
is divided into sections.

Therefore, if the inner surface of the cylindrical box 1 and this flat strip spring 9 come into pressure contact, the load shaft 3 will become unable to rotate due to the friction acting between them, and the ratio of the diameter of the rectangular portion to the diameter of the flat strip spring 9 will be increased. By doing so, the load shaft 3, which is integral with the rectangular portion, does not rotate for either rotation.

On the other hand, the side clamping plate lug 8 is configured by a driving force transmitting member, such as a flat tube 10 (which may simply be a side plate), fixed to the drive shaft 4 in order to rotate the load shaft 3 from the outside thereof. They are sandwiched together with a certain amount of play. That is, this rectangular tube 10 is fixed to the inner end of the drive shaft 4 at the center of the shaft, and the play between the rectangular tube 10 and the rectangular portion 6 of the load shaft 3 with respect to the side clamping plate lug 8 is limited. The distance between the side clamping plates 7 and the side clamping plate ears 8 is at least the maximum distance between the side clamping plates 7 when the drive shaft 4 rotates, and the side clamping plate ears 8
It is set so that rotation is not possible beyond 90 degrees.

The rectangular tube 10 fixed to the drive shaft 4 in order to rotate the load shaft 3 from the outside of the side clamping plate lug 8 is arranged so that the side clamping plate 7 is maximally separated from the rectangular portion 6 of the load shaft 3. Since the rectangular tube 10 has more play than
The side clamping plate ears 8 are separated from each other by the rotational force from the load shaft 3 that resists the biasing force of the flat band spring 9, and do not become an obstacle when the flat band spring 9 is brought into pressure contact.

A handle 11 is fixed to the outer end of the drive shaft 4 than the bearing, and the cylindrical box 1 is fixed to the outer surface of the handle 11 by a U-shaped guide 12.

Therefore, when a rotational force is applied to the drive shaft 4 by an external force from the handle 11, the rectangular tube 10, which is a driving force transmission member fixed to the drive shaft 4, rotates.
The flat band spring 9 is compressed while winding up the side clamping plate lug 8, and the load shaft 3, which includes the rectangular portion sandwiched between the side clamping plate 7 and the side clamping plate lug 8, is subjected to the rotational force from the drive shaft 4. Therefore, it will rotate in that rotation direction.

Note that the flat strip spring 9 may be replaced with a rectangular coil spring 13 shown in FIG. 4, and the shape of the side clamping plate 7 may be replaced with a semicircular plate whose outer edge is on the inner surface of the cylinder 1, but the same effect can be obtained. It is possible to construct a winder with

In addition, the shapes of the rectangular portion 6 of the load shaft 3, the side clamping plate 7 sandwiching it, its lug 8, and the rectangular tube 10 sandwiching the side clamping plate lug 8 are determined by the play set there and the rotation of 90 degrees or more. It may be a bisected ellipse as long as it satisfies the combinational relationship for disabling it.

Incidentally, if the load force is large depending on the application, it is natural to install a gear, a belt, a belt pulley, etc. on the load shaft 3 to reduce the driving force of the handle 11, and to balance it with labor. Also handle 11
It goes without saying that the work can be done more smoothly by taking out a non-rotatable nigiri stick from the outside of the cylindrical part and rotating the handle 11 while gripping it with the other hand in order to balance the body while turning the handle.

Although the gist of the invention has been explained with reference to specific embodiments thereof, in addition to its use in greenhouses and large plastic greenhouses, it can also be used for hoisting ropes for tennis and volleyball nets, fishing ropes, flag balls, advertising banners, etc. It is clear that it can be used in a wide range of applications and that many variations and modifications of the invention are possible based on what has already been described.

(Effects of the Invention) As explained above, according to the present invention, the difficulties and inconveniences of conventional hoisting machines can be solved, and the brake can be applied to the rotation of the load from the load shaft in either direction. It is possible to provide a hoist that can operate in the handle rotational direction without applying a sudden load from the handle drive shaft side to the load shaft in either rotational direction.

In the hoisting machine of the present invention, since the outer diameter ratio of the load shaft to the flat band spring is large, the control force of the brake is strong.
Also, there is no need for a pawl or pawl wheel, and there is no sudden rotational shock when the pawl is removed. Furthermore, depending on how quickly the handle is rotated, it is possible to wind up smoothly and rewind with some braking, making the workability ideal. Moreover, by changing the U-shaped guide that serves as a rotation stopper to a mounting plate such as a pillar, the device can be used in a wide range of industrial applications.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a cross-sectional view taken along the line A-A, and FIG. 3 is a flat strip spring and a brake component. FIG. 4 is a perspective view of a rectangular coil spring and a main part of a brake showing another embodiment. DESCRIPTION OF SYMBOLS 1... Cylindrical box, 2... Friction plate, 3... Load shaft, 4... Drive shaft, 5... Core shaft, 6... Rectangular section, 7... Side sandwich plate, 8... Side sandwich plate Ear, 9... Flat band spring, 10... Flat tube, 11... Handle, 1
2... Guidance guide, 13... Rectangular coil spring.

Claims (1)

[Scope of Claims] 1. In a winding machine that performs hoisting and unwinding control from a drive shaft to a load shaft connected to a winding drum, the load shaft and the drive shaft are mutually rotatable on one axis by male and female shafts. A non-rotating cylinder that is coupled and supported and has a friction plate glued to its inner surface, and a load shaft with a rectangular tip located inside the non-rotating cylinder, with both sides of the load shaft at an angle of at least 90 degrees or more relative to the load shaft. A pair of side clamping plates that are held together with non-rotatable play; and a pair of side clamping plates that are fixed to the pair of side clamping plates and urge them toward both sides of the load shaft, and when they are separated by rotation of the load shaft. a flat band spring that is in pressure contact with the inner friction plate of the non-rotating cylinder; a pair of side clamping plate ears protruding from the side clamping plates along both side surfaces of the load axis rectangular portion; and these side clamping plates. Fixed to the drive shaft to rotate the load shaft from the outside of the plate lug, the side clamping plate is attached to the load shaft flat rectangular portion at least so that the side clamping plate is separated from the maximum when the drive shaft is rotated, and the side clamping plate is attached to the side clamping plate lug. A hoisting machine characterized by having a driving force transmitting member that is pinched and has a play that cannot be rotated by 90 degrees or more. 2. The hoisting machine according to claim 1, wherein the flat band spring is a rectangular coil spring. 3. The side clamping plate has a semicircular shape with an outer edge portion along the inner surface of the non-rotating cylinder, and the flat band spring is brought into pressure contact with the friction plate of the non-rotating cylinder from the inner surface. The hoisting machine according to item 1. 4. Each shape of the rectangular portion of the load shaft, the side clamping plate and its lug, and the driving force transmission member sandwiching the side clamping plate lug is configured by combining two halves of an elliptical shape. A hoisting machine according to claim 1.