JPS58125596A - Hoist - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] It can be rolled up.

This type of manual hoisting machine may have a structure in which the hoisting wire, chain 7, etc. on the output shaft side are hoisted by manually rotating a handle attached to the input shaft side, but in order to hoist the load, Since the rotational force is applied from the operator's effort, the load can be hoisted and lowered by simply rotating the handle, and the load can be maintained in the hoisting position as required. It is desirable to be able to do so. Incidentally, when you have to apply a relatively large rotational force to hoist or lower a load, if you are distracted by complicated operations, you may lose the force of the handle and the handle may turn upside down. There is a risk that the device may rotate, which may pose a danger to the operator.

The present invention has been made in consideration of the above points, and has a relatively simple configuration that brakes the handle so that the load is not transmitted to the handle when the handle is not rotated, and also controls the handle in this braking state. This is an attempt to propose a hoisting machine that can automatically remove braking force simply by rotating it.

91 of the present invention will be described in detail with reference to the drawings below. Reference numeral 1 denotes a rotating shaft, which is rotatably supported by radial bearings 2 and 3 so as to extend through the mounting @ 4 and the case 5 in the front and back direction. There is. The rear end of the rotating shaft 1 projects rearward from the case 5, and this projecting end Kli! A handle 7 is attached with a bolt 8 to the handle attachment fitting 6 added to F1. Further, the front end of the -1 rotating shaft 1 projects forward from the mounting plate 4, and the output gear 9 is fixed to this projecting end, so that when the operator rotates the handle 7 clockwise in FIG. When the output gear 9 is rotated, the load is hoisted from K through the chain suspended on the output gear 9, and conversely, when the handle 7 is rotated counterclockwise, the output gear 9 is hoisted through the rotation shaft 1. K is adapted to lower the load via the chain by being rotated in the opposite direction.

A brake release fixed wheel 1 is fixed to the rear end of the rotating shaft 1 in the case 5 so as to rotate together with the rotating shaft 1. The fixed wheel 11 is supported by a thrust bearing 12 inserted between the case 5 and the back plate 5A.

A braking rocking wheel 13 is rotatably mounted on the rotating shaft l so as to be adjacent to the front side of the fixed wheel 11, and is inserted between the thrust bearing 14 provided on the front side and the mounting plate 4. It is compressed and biased in a direction approaching the fixed wheel 11 by a push spring 15 . The outer peripheral surface of the rocking wheel 13 forms an inclined surface 21 whose radius decreases toward the rear, and when the rocking wheel 13 is biased to the rear position by the push spring 15, the inclined surface 21 is provided on the inner surface of the case 5. The friction braking surface 22 is adapted to engage with the friction braking surface 22 . In this embodiment, the friction braking surface 22 is inclined toward the rear so as to come into surface contact with the outer circumferential surface 21 of the rocking wheel 13 (accordingly, to approach the rotation axis IK).

A plurality of, for example, three conical holes 5 and 5 are bored in the opposing surfaces of each of the fixed wheel 11 and the rocking wheel 13, and opposing conical holes 6 and 2fMK, for example, a meso n made of a steel ball is inserted. There is. However, when the operator is not rotating the handle 7, the rocking wheel 13 is biased toward the stationary wheel 11 by the push spring 15, so that the meson n is in the conical hole 6 and the twist is in the center, as shown in 1a. The hole 6 and the addition face each other so that they are located at . On the other hand, when the handle 7 is rotated clockwise in FIG. 2, the fixed wheel 110 and the conical hole δ are rotated clockwise in FIG.
When it deviates from the 30% conical hole, the meson 4 is pushed forward by the conical surface of the hole 6 of the fixed wheel 11 and swings.
The conical surface of the hole 13 is pushed forward against the spring 15. At this time, the rocking wheel 13
As 1 moves away from the inclined surface η of case 5, the front ll1ii
The thrust bearing 14 of 1 is held in contact with the locking fitting 29, and the rocking wheel 13 is thus rotated while being fixed integrally with the fixed wheel 11 by the intermediate nK.

Similarly, when the handle 7 is rotated counterclockwise in the IR2 diagram, the rocking wheel 13 applies the friction braking i1 of the case 5.
It rotates apart from i+22 and fixed integrally with the stationary wheel 11 via the intermediate 4.

Note that 31 is a k-th bolt for fixing the case 5 to the mounting @ 4, and 32 is a mounting hole for mounting the mounting plate 4 as part of the hoisting mechanism.

In the above configuration, to wind up the load, the handle is rotated clockwise in FIG. 2. At this time, the swing 1113 is pushed forward by the intermediate member 27 against the push spring 15 as shown in FIG. Become a state.

Therefore, the rotational force applied from the handle 7 to the rotating shaft IK is transmitted to the output gear 9 without being braked by the output gear 9, and the load is therefore hoisted up via the chain.

In this winding state 1, when the operator stops rotating the handle 7 and releases the handle 7, for example, the rotational force applied to the fixed wheel 11 via the rotating shaft 1 is no longer applied, so that the fixed wheel 110 has a conical hole δ. INK is pushed into the conical hole 3 of the rocking wheel 13 via the intermediate n, and is aligned as shown in FIG.

At this time, the swing Ji 13 is biased backward by the push spring 15, and the outer tooth 21 comes into contact with the friction damping portion 4 of the case 5. The rocking wheel 13 is therefore braked by the friction braking surface ρ due to the biasing force of the pressure spring 15. However, in this state, the fixed wheel 11 is braked integrally with the rocking wheel 13 via the intermediate n, and the load is ultimately held at the hoisting position via the rotating shaft 1, output gear 9, and chain.

To lower the load from this state, the operator can rotate the handle 7 counterclockwise in FIG. 2.

In this way, in the same manner as described above regarding winding, the rocking wheel 13 is pushed forward through the rigid wheel 11 and the intermediate n, thereby separating from the friction braking surface n, and the output gear is moved through the rotating shaft 1. 9 in the lowering direction. Therefore, the load is lowered in accordance with the operation of the handle 7 by the operator.

If, for example, the operator releases his hand from the handle 7 during this process, the brake wheel 11 will be in a braked state 1DK with the 25 conical holes aligned with the conical holes of the rocking wheel 13 by the intermediate member 2'7. The load will thus be held in its lowered position.

In the above description, the friction brake WJ22 is formed by an inclined surface, but the structure is not limited to this, and the structure is such that the brake can be released when the rocking wheel 13 is pushed forward by the meson valley. It's good to have.

In addition, in the above description, in order to engage the fixed wheel 11 and the rocking wheel 13, a meso ball n formed between the conical holes 3 and 3 is used.
However, instead of this, for example, fixed car 1
1 or the rocking wheel 13, and the protruding midpiece is engaged with a conical hole, etc., in short, at least one of the facing surfaces of the fixed wheel 11 and the rocking wheel 13. On one side, an inclined surface is formed that slopes forward in the direction of rotation, and by engaging this inclined surface in an intermediate manner extending in the front-rear direction, the rocking wheel 13 is rocked in the front-rear direction and the frictional braking is released. Let's make it 5.

As described above, according to the present invention, when the operator stops applying rotational force to the handle, the operator simply applies %III#n to the rotating shaft and rotates the handle in the winding or lowering direction from this braking force. Therefore, it is possible to obtain a hoisting machine that can immediately release the brake in any direction and control the hoisting or hoisting movement of the load by the rotational force applied to the nozzle. In this way, it is possible to have a simple structure in which the braking mechanism and its release device are placed together on the rotating shaft.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of the hoisting machine according to the present invention, FIG. 2 is a rear view thereof, and FIG. 3 is a cross-sectional view showing the operating state. 1...Rotating shaft, 2.3...Radial bearing, 4...Mounting plate, 5...Case, 6...
・Handle mounting bracket, 7... Handle, 9... Output gear, 11.
... fixed wheel, 13 ... rocking wheel, 15 ... push spring, force ... inclined surface. ρ...Friction braking surface, 5.26...Conical hole, 2
7-=・middle child.

Claims (1)

[Claims] A rotating shaft that transmits the rotational force applied to the handle to the load side, a fixed wheel fixed to this rotating shaft, and a fixed wheel that is mounted so as to be able to move on the rotating shaft in the direction of extension Km opposite to this fixed wheel. a rocking wheel, and a push spring that compresses and biases the rocking wheel in the direction of the fixed wheel and applies frictional braking to the rocking wheel; When the stationary wheel is rotated by rotating the handle in contact with a slope a that slopes in the extension direction of the rotating shaft as it moves forward, the rocking wheel is swung by the push spring KFc. The special feature is the interposition of an intermediate element that releases the above-mentioned brake on the skeleton swing 1EIIjlK.