JP2539131Y2 - Hook block - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention uses a flexible flat belt as a support for loading a load, and winds the load by winding the flexible flat strip over a drum in a spiral manner. The present invention relates to an improvement in a hook block of a hoist that is raised.

[0002]

2. Description of the Related Art Conventionally, as a small hoisting machine, an electric hoist using a wire rope as a support for hoisting a load and an electric chain block using a load chain have been widely and widely used.

[0003] Such conventional hoisting machines also have disadvantages,
As a small-sized hoisting machine which solves this drawback, a flexible flat band is used as a support for hoisting a load, and the flexible flat band is wound around the drum in a spiral manner. The hoist described above has been devised by the present applicant and has already been filed for utility model registration (Japanese Utility Model Laid-Open No. 2-52894 and Japanese Utility Model Laid-Open No. 2-52895).

[0004] In such a hoist, the flexible flat band is fixed at one end to the peripheral surface of the drum by a suitable means, and a sheave of a hook block is bridged over the hanging part. The other end is fixedly attached to a casing supporting the drum.

[0005]

Generally, in a hook block of a hoisting machine, the hook block itself often swings forward, backward, left and right or rotates during a cargo handling operation.

[0006] In particular, in a hoisting machine using a flexible flat body as a support for hoisting a load, when the hook block is wound up while swinging as described above, the flexible flat band is used. In some cases, the flexible flat band member is not smoothly wrapped around the sheave of the hook block, for example, when the body is inverted and wrapped around the sheave or rides on the flange portion of the sheave. Such an abnormal entanglement may cause problems such as damage to the flexible flat band member, and in some cases, lead to a cutting accident.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems in advance, and is intended to solve the problem. A hook of a hoist using a flexible flat band as a support for hoisting a load is provided. It is an object of the present invention to provide a hook block in which a flexible flat body is smoothly wound around a sheave.

[0008]

According to the present invention, as a means for solving the above-mentioned problems, a hook block of a hoisting machine using a flexible flat band for a load hoisting support is provided. It is provided with a guide device for guiding the winding of the flexible flat band member bridged over the peripheral surface of the sheave of the block and preventing the flexible flat band member from falling off.

[0009]

With such a configuration, even when the hook block itself swings during the cargo handling operation or is wound up while swinging, the flexible flat band body can be moved by the guide device by the operation of the guide device. It will be smoothly wrapped around the sheave.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An outline of a hoist using a hook block according to the present invention will be described below with reference to the drawings.

As shown in FIGS. 5 and 6, the hoist comprises a casing 1 provided at the center,
, A hoisting motor 2 with a built-in magnet brake, a speed reducer 3 provided on the other side of the casing 1, a drum 4 provided in the casing 1, and a spiral winding around the drum 4 Flexible strip 5 wound up
A hook block 6 bridged over the hanging part of the flexible flat band member 5, a control panel 7 containing a control device for the electric motor 2, and a limit for preventing the hook block 6 from being overwound. It is roughly constituted by a switch 8 and the like. Reference numeral 9 denotes a mounting hole for connecting the hoist to a trolley (not shown) for running the hoist, and reference numeral 10 denotes a guide device for guiding the flexible flat band member 5 to be wound around the drum 4.

Referring to FIG. 7, the internal structure of the hoist will be described. On one side surface of a casing 1 provided at the center, a hoisting motor (axial gap type) 2 with a built-in magnet brake is fixed by a required number of bolts 11. The electric motor 2 has a brake mechanism B integrally incorporated therein. Bearings 14, 15, and 15 are provided on a motor flange 12 and a brake cover 13.
It has a motor shaft 17 having both ends mounted via a shaft 16.

Next, a reduction gear 3 for reducing the rotation of the electric motor 2 is fixed to the other side surface of the casing 1 by a required number of bolts 18. This reduction gear 3 has several stages of reduction gears 21 built in a gear case 19 and a gear case cover 20, and one end of an input shaft 22 is spline-fitted to the electric motor shaft 17. The output shaft 23 of the speed reducer 3
Is supported by the gear case 19 through bearings 24 and 25, and one end of the gear case 19 projects into the casing 1.

On the other hand, at the center of the casing 1, a drum 4 supported on the motor flange 12 via a bearing 26 is provided.
Is located. The drum 4 has a boss 4 provided at the center.
and flange portions 4b, 4b provided at both outer peripheral ends thereof and having an appropriate height. The boss 4a of this drum 4
Is fixed to the end of the output shaft 23 by a key 27.
As a result, the driving force of the electric motor 2 is transmitted to the drum 4 via the speed reducer 3.

As shown in FIGS. 7 and 8, a flexible flat band member 5 is wound around the drum 4 in a spiral manner. The flexible flat body 5 has an appropriate width W1 and thickness t1, as shown in FIGS.
And a sewn portion 5b having one end folded and sewn, and a folded eye portion 5c. Reference numeral 5d denotes a hole formed in the vicinity of one end of the flexible flat body 5, and a small screw for attaching the belt presser 28.
29 is to be inserted. The flexible flat belt 5 is made of a leather belt, a rubber belt, or a synthetic fiber belt woven with a polyamide, polyester, or polypropylene multifilament yarn, and has a necessary and sufficient strength. .

As shown in FIG. 8, one end of the flexible flat band member 5 structured as described above is firmly connected to the peripheral surface of the drum 4 by a belt presser 28 and a small screw 29. The other end eye portion 5c of the flexible flat body 5 is attached to a part of the casing 1 via a shaft 30. An interval W2 between the flange portions 4b, 4b, which is an effective winding width of the drum 4, is formed to be slightly larger than the width W1 of the flexible flat body 5. The height of the flanges 4b, 4b is such that the flexible flat strip 5 can be prevented from falling off when the flexible flat strip 5 is spirally wound a required number of times. The flange portions 4b, 4b have a function of guiding the winding of the flexible flat band member 5 so that the flexible flat band member 5 is spirally wound around the peripheral surface of the drum 4, and a function of preventing the flexible band member 5 from falling off.

A hook block 6 is bridged between the two main body portions 5a of the flexible flat band member 5. As shown in FIGS. 1 and 2, the hook block 6 includes a U-shaped frame 31, a sheave 34 rotatably supported by the frame 31 via a shaft 32 and a bearing 33, It comprises a hook 37 and the like rotatably supported on the bearing 31 via a bearing 35 and a nut 36. The main body portion 5a of the flexible flat band member 5 is engaged with the peripheral surface of the sheave. The sheave 34 has a groove width W corresponding to the width W1 of the flexible flat body 5.
3 and flange portions 34a, 34a
It has. The flanges 34a, 34a have a function of guiding the winding of the flexible flat body 5 and preventing the flexible flat body 5 from falling off. Numeral 38 denotes a sheave cover for covering the rotating part of the sheave 34 of the hook block 6.

Next, an embodiment of a guide device 39 for guiding the winding of the flexible flat body 5 into the sheave 34 and preventing the flexible flat body 5 from falling off will be described.

The guide device 39 shown in FIGS. 1 and 3 comprises a rolling roller 41 rotatably pivoted by a shaft 40 between the frames 31, 31 of the hook block 6 formed in a U-shape.
Are provided in a pair so as to face the sheave 34. The mounting position of this rolling roller 41 is
The peripheral surface of 41 is located at a position facing the peripheral surface serving as a winding start portion of the flexible flat band member 5 bridged over the sheave 34 supported by the frame 31. The gap between the peripheral surface of the rolling roller 41 and the peripheral surface of the sheave 34 is equal to the thickness t1 of the flexible flat body 5.
It is formed slightly larger than. The rolling rollers 41
Is preferably formed of a member having a small coefficient of friction with the flexible flat band member 5 and a small surface roughness. In the guide device 39 thus formed, the rolling roller 41 and the flange portion 34a of the sheave 34 are combined, and the thickness direction of the flexible flat body 5 inserted between the rolling roller 41 and the sheave 34 is formed. And position control in the width direction. Thereby, the flexible flat band member 5 is guided to be wound around the sheave 34, and is prevented from falling off. Note that 42 in FIG.
Are insertion holes for the flexible flat band member 5 provided in the sheave cover 38.

Next, another embodiment of the guide device 39 will be described with reference to the left half of FIG. This guide device 39 is provided with opposing position restricting members 43, 43 each having a U-shaped distal end. The base end of each of the position restricting members 43 is formed into a U-shaped frame 31 of a hook block 6. It is formed by sticking to the substrate. The mounting position of this position regulating member 43 is
The hook block 6 is provided on the tangential direction in which the flexible flat band 5 bridged over the sheave 34 is wound. The inner width of the position regulating member 43 is formed to be slightly larger than the width W1 and the thickness t1 of the flexible flat band 5. It is desirable that the position regulating member 43 be formed of a member having a small coefficient of friction with the flexible flat band member 5 and a small surface roughness. In the guide device 39 thus formed, the position of the flexible flat body 5 in the thickness direction and the width direction of the flexible flat body 5 inserted through the position regulating member 43 in the tangential direction in which the flexible flat body 5 is wound. Regulations will be enforced. Thereby, the flexible flat body 5 is guided to be wound around the sheave 34 and is prevented from falling off. The right half of FIG. 4 illustrates the position regulating member 43 which is also used as the insertion hole 42 of the flexible flat band member 5 provided on the sheave cover 38. In this case, the opening width of the insertion hole 42 (W in FIG. 4)
4 and t2) are formed slightly larger than the width W1 and the thickness t1 of the flexible flat band member 5. In this case, the insertion hole 42 regulates the position of the flexible flat body 5 in the thickness direction and the width direction, and the same operation and effect as described above can be obtained.

[0021]

As described above in detail, in the hook block according to the present invention, the guide device which guides the winding of the flexible flat band spanning the peripheral surface of the sheave and prevents the flexible flat band from falling off. Since the flexible flat band is smoothly wound around the sheave of the hook block even if the hook block itself swings during the cargo handling operation, the flexible flat band Inversion is prevented from being involved and getting on the sheave. As a result, the flexible flat strip is not damaged by the abnormal winding, and a hook block with high safety can be obtained.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a hook block according to the present invention.

FIG. 2 is a sectional view of a principal part taken along line II-II of FIG.

FIG. 3 is a cross-sectional view of a main part along a line III-III in FIG. 1;

FIG. 4 is a plan view showing another embodiment of the guide device.

FIG. 5 is a front view of the hoist using the hook block according to the present invention.

FIG. 6 is a right side view of FIG.

FIG. 7 is a sectional view taken along line VII-VII in FIG. 6;

8 is a sectional view taken along the line VIII-VIII in FIG.

FIG. 9 is a front view in which a flexible flat band is developed.

FIG. 10 is a plan view of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Electric motor 3 Reduction gear 4 Drum 5 Flexible flat body 6 Hook block 31 Frame 34 Sheave 38 Sheave cover 41 Roller roller 42 Insertion hole 43 Position regulating member

Claims (4)

(57) [Scope of request for utility model registration] 1. A hook block of a hoist using a flexible flat body as a support for hoisting a load, wherein the flexible flat strip is bridged over a peripheral surface of a sheave of the hook block. A hook block comprising a guide device for guiding entanglement and preventing falling off. 2. The guide device according to claim 1, wherein the guide device is rotatably pivotally attached to a frame of the hook block, and includes a pair of rolling rollers facing the sheave peripheral surface of the hook block. Hook block. 3. A guide device for regulating the position of the flexible flat body in the thickness direction and the width direction in the tangential direction in which the flexible flat body wound over the sheave of the hook block is wound. 2. The hook block according to claim 1, wherein the hook block comprises a position regulating member. 4. The hook block according to claim 3, wherein the position restricting member is configured to also be used as an insertion hole of a flexible flat band provided in a sheave cover of the hook block.