JPH0532388U - Small hoist - Google Patents

Abstract

(57) [Summary] [Objective] To provide a small-sized hoisting machine that uses a flexible flat belt as a support for hoisting a load so as to ensure a predetermined winding. To aim. [Structure] A flexible flat strip 5 is used as a support for hoisting a load. Further, it is a hoisting machine in which the flexible flat belt 5 is wound around the drum 4 in a spiral shape so as to wind up a load. Further, in this hoisting machine, the wind-up portion and the wind-up portion 5e in the main body of the flexible flat strip 5 can be distinguished from each other so that a predetermined wind around the drum 4 is ensured. Change the hue. As a result, it is possible to easily visually confirm the state of securing the spiral winding from the outside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a small hoisting machine which uses a flexible flat belt as a support for hoisting a load.

[0002]

[Prior 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 used.

In the conventional hoisting machine as described above, in the former case, the wire rope is sequentially wound around the drum in the lateral direction, and therefore the total length of the drum must be increased in order to secure the required lift. If the life of the wire rope is taken into consideration, the diameter of the drum and the diameter of the sheave must be increased to some extent, which inevitably increases the headroom size and the structure of the airframe. There was a drawback.

On the other hand, in the latter, since the load chain is meshed with the chain wheel and is wound up in sequence, when the chain wheel wears, the winding noise becomes loud and it is a single suspension. It had the drawback that the suspended load could swing easily and the stability of the load during winding was poor.

As a small hoisting machine that solves the above-mentioned conventional drawbacks, a flexible flat strip is used as a support for hoisting a load, and the flexible flat strip is mounted on the peripheral surface of the drum. A hoisting machine that is configured to be wound in a spiral shape has been devised by the applicant of the present application and has already filed an application for registration of a utility model (actual utility model 2-52894 and actual utility model 2-52895).

In such a hoisting machine, one end of the flexible flat belt is fixed to the peripheral surface of the drum by a suitable means, and the sheave of the hook block is bridged over the hanging intermediate portion. On the other hand, the other end is fixedly attached to the casing supporting the drum.

[0007]

[Problems to be solved by the device]

 Generally, in a hoist, it is important to secure all-winding. This self-winding refers to the hoisting support that is still wound around the drum when the hook block is hoisted only by the specified lifting height. The purpose is to reduce such tensile force and prevent the hoisting support from being pulled out from the drum by the load. If it is used in a state in which the hoisting roll is not used, not only will the drum mounting part of the hoisting support be damaged or fall out, but if the hoisting is continued, the hoisting support will reversely wind, There are concerns that the over-protection device will not operate and that the hoisting support will be damaged.

The present invention has been made as a solution to prevent such a problem in advance, and in a hoisting machine using a flexible flat belt as a support for hoisting a load, It is an object of the present invention to provide a small hoisting machine that ensures a predetermined winding.

[0009]

[Means for Solving the Problems]

 As a means for solving the above problems, the present invention uses a flexible flat strip as a support for hoisting a load, and the flexible flat strip is wound around a drum in a spiral shape. In a hoisting machine for hoisting a load, in order to ensure a predetermined all-wound winding on the drum, the all-wound portion and the winding portion in the main body of the flexible flat strip are distinguished. The hue is changed so that it can be easily seen from the outside to confirm that all the windings have been secured.

[0010]

[Action]

 With such a configuration, the cargo operator can easily visually recognize the presence or absence of all-out winding when the hoist is in use, so that a flexible flat belt is provided on the peripheral surface of the drum. Even when wound in a spiral shape, it is possible to reliably ensure the predetermined spiral winding.

[0011]

【Example】

 Hereinafter, a hoisting machine according to the present invention will be described with reference to FIGS. 1 and 2.

This hoisting machine includes a casing 1 provided in the central portion, a hoisting electric motor 2 with a built-in magnet brake provided on one side surface of the casing 1, and a speed reducer provided on the other side surface of the casing 1. 3, a drum 4 provided in the casing 1, a flexible flat strip 5 wound around the drum 4 in a spiral shape, and a flexible flat strip 5 which is suspended in the middle thereof. It is roughly configured by a hook block 6 that is mounted, a control panel 7 that incorporates a device for controlling the electric motor 2, and an overwinding limit switch 8 that prevents the hook block 6 from being overwound. Reference numeral 9 is a mounting hole for connecting to a trolley (not shown) for running the hoisting machine, and 10 is a guide device for guiding the winding of the flexible flat belt 5.

The internal structure of this hoisting machine will be described with reference to FIG.

On one side surface of the casing 1 provided at the central portion, a hoisting electric motor 2 with a built-in magnet brake (gap type in the axial direction) is fixed by a required number of bolts 11. This electric motor 2 is one in which a brake mechanism B is integrally incorporated, and has an electric motor shaft 17 whose both ends are axially attached to a motor flange 12 and a brake cover 13 via bearings 14, 15, 16.

Next, a speed reducer 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. The speed reducer 3 has a gear case 19 and a gear case cover 20 in which several stages of reduction gears 21 are built. One end of an input shaft 22 of the reduction gear 3 is spline-fitted to the motor shaft 17. The output shaft 23 of the speed reducer 3 is supported by the gear case 19 via bearings 24 and 25, and one end of the output shaft 23 projects into the casing 1.

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

On the peripheral surface of the drum 4, as shown in FIG. 4, a flexible flat strip 5 is wound in a spiral shape. As shown in FIGS. 5 and 6, the flexible flat strip 5 has an appropriate width W1 and thickness t1, and has a main body portion 5a and a sewn portion 5b which is sewn by folding one end thereof. And the folded eye portion 5c. Reference numeral 5d is a hole drilled in the vicinity of one end of the flexible flat belt body 5, into which the mounting small screw 29 of the belt retainer 28 is inserted. The flexible flat belt body 5 is composed of a leather belt, a rubber belt, or a synthetic fiber belt woven with polyamide-based, polyester-based, and polypropylene-based multifilament yarns, and has necessary and sufficient strength. .

As shown in FIGS. 3 and 4, one end portion of the flexible flat belt body 5 configured as described above is firmly attached to the peripheral surface of the drum 4 by a belt retainer 28 and a machine screw 29. To be done. Further, the other end eye portion 5c of the flexible flat strip 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 the effective winding width of the drum 4, is formed to be slightly larger than the width W1 of the flexible flat strip 5. Further, the height of the flange portions 4b / 4b is formed so as to prevent the flexible flat strip body 5 from falling off when the flexible flat strip body 5 is wound in a required number of times. The flange portions 4b, 4b have a function of guiding the winding of the flexible flat strip 5 so that the flexible flat strip 5 is wound around the peripheral surface of the drum 4 in a spiral shape and preventing the flexible flat strip 5 from falling off.

In the small hoisting machine configured as described above, according to the present invention, in order to ensure a predetermined winding around the drum 4, as shown in FIG. 5 and FIG. The body 5a of the strip 5 is formed by changing the hue so as to distinguish between the winding portion 5e and the winding portion 5e. This is, as described above, one end of the flexible flat strip 5 is tightly bound to the peripheral surface of the drum 4 so as to be wound in a spiral shape and wound in a predetermined manner (two windings in this embodiment). By changing the hues of the self-winding portion 5e and the continuous winding portion 5f, the self-winding portion and the wind-up portion are distinguished from each other. The length of the flexible winding strip 5 that changes the hue of the flexible strip 5 is such that a predetermined spiral winding can be secured so that it can be easily seen from the outside by the cargo operator. And This confirmation is performed by, for example, comparing the part of the casing 1 and the spirally wound portion 5e of the flexible flat strip 5 with each other.

When the hoisting machine according to the present invention configured as described above is used, when the electric motor 2 is energized by operating means (not shown), the drum 4 is decelerated. As a result, the flexible flat strip 5 having one end fixed to the peripheral surface of the drum 4 is neatly wound in a spiral shape on the peripheral surface of the drum 4 and suspended from the hook block 6 (not shown). ).

At this time, when the hook block 6 is unwound above the specified lifting height (the state in which there is no all-over winding), the all-over winding portion 5e in which the hue of the flexible flat strip 5 is changed is By making a relative comparison between the casing 1 portion and the spirally wound portion 5e of the flexible flat strip 5, it is possible to easily confirm the winding state from the outside.

[0022]

[Effect of the device]

 As described in detail above, in the hoisting machine according to the present invention, a flexible flat strip is used as a support for hoisting a load, and the all-up winding portion and the winding portion of the flexible flat strip are used. Since it is configured to change the hue of the part, the cargo handling operator can easily visually recognize the presence or absence of all-winding from the outside when the hoist is in use. As a result, the hoisting machine will not be used in a state where all the windings are gone, and accidents such as damage or falling of the drum mounting part of the hoisting support can be prevented, and a hoisting machine with high safety. Can be obtained.

[Brief description of drawings]

FIG. 1 is a front view of a hoisting machine according to the present invention.

FIG. 1 is a side view.

FIG. 3 is a sectional view taken along the line III-III in FIG.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a front view of a developed flexible flat belt.

FIG. 6 is a plan view of FIG.

[Explanation of symbols]

 1 casing 2 electric motor 3 speed reducer 4 drum 5 flexible flat belt body 5a main body portion 5e all winding portion 5f winding portion

Claims (1)

[Scope of utility model registration request] 1. A hoist in which a flexible flat strip is used as a support for hoisting a load, and the flexible flat strip is wound around a drum in a spiral form so as to wind up the load. In the machine, the hue is changed so that the spiral winding portion and the winding portion in the main body of the flexible flat belt can be distinguished from each other in order to secure a predetermined spiral winding on the drum. The small hoisting machine is configured so that the secured state of the can be easily seen from the outside.