JP3236864B2 - Belt hoist - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt-type hoist which rotatably supports a winding body on which a belt is wound between a pair of side plates facing each other.

[0002]

2. Description of the Related Art Conventionally, as a belt type hoist of this kind, for example, Japanese Utility Model Laid-Open No. 6-25290 and Japanese Utility Model Laid-Open No. 5-3238.
Japanese Patent Application Laid-open No. 6-206, No. 6 discloses a flat belt in which a hook or the like is hooked on the tip side around the outer periphery of a winding body driven to rotate by a forward / reverse rotation motor. The belt is wound around the winding body by the drive of the motor, and is unloaded or unloaded via the belt.

[0003]

However, in the above-mentioned hoisting machine, when the belt is wound up or down on the winding body during operations such as unloading and unloading, the belt may be twisted on the way. In particular, when the belt is twisted at the time of winding the belt around the winding body, the belt may be wound in a twisted state, that is, a turbulent winding state, and the belt may be damaged.

A main object of the present invention is to prevent the belt from being wound in a turbulent state, and to wind the belt around a winding body without being affected by an increase or decrease in the winding diameter of the belt. Another object of the present invention is to provide a belt-type hoist that can smoothly perform a lowering operation.

[0005]

To achieve To achieve the object described above, a first aspect of the present invention, between Saidopure <br/> over you want to face each other, they rotate freely winding body wound around the belts a supporting and comprising a belt-type traction machine, the Berutogai de with belt conductive portion on the inter-side plates <br/>, winding of belts
Oh provided to slide freely so as to allow the winding operation to the
Moving the belt from the winding body to the belt guide.
Belt slack detection that detects belt slack along the path
The belt guide is provided with respect to the belt.
A housing space is provided on the side opposite to the belt conducting portion, and the housing space
Wherein the belt slack detector is housed.
You .

[0006]

[0007] According to a second aspect of the invention, the winding path <br/> to the winding of the belts, the pressing body which always elastically pressed toward the belts of the winding portion radially inward a is provided.

[0008] According to a third aspect, in one of the side plates and the <br/> Berutogai de, provided Kakarigo突portion, on the other, engaged with the engagement Go突portion, at least the take-up A guide strip is provided extending over a range between an inner position hanging down from the minimum winding position of the body and an outer position hanging down from the maximum winding position.

[0009] The invention of claim 4, wherein, as the non-circular the Kakarigo突portion, and a non-rotatable against the Berutogai de to the side plates.

[0010]

According to the first aspect of the present invention, winding is performed.
When work such as defeating the winding turns of the belts against the body, the bell
Because the door is more guided to the conductive portion of the Berutogai de, bell
Bets can be prevented from being wound in a turbulent wind-conditions, particularly, belt
To be able to wind onto the winding body in good working posture can be prevented damage Ranmaki velvet <br/>: NetBackup.

[0011] Moreover, the Berutogai de is to allow the winding operation of the belts which pairs <br/> the winding body, the side play
To slide freely supported on bets, depending on <br/> winding diameter change of belts against the winding body, since Berutogai de is <br/> against sliding to the side plates, the guide in this Berutogai de while it is possible to smoothly perform the winding and winding beat operation of the winding of the belts to be, the bell by the Berutogai de
G can be reliably prevented from being twisted.

[0012] Then, even when you are beat up the belt in a state in which the hook to the free end of the belt being coupled, the or hooks hit the ground, or winding defeated by or bought hooking in the middle of the fault , the tension is eliminated in the belt at the time of beating the winding, because the belt loosening detector operates can be made to immediately stop the rotation of the winding body on the basis of the detection result of the belt loosening detector. This prevents turbulent winding by the relaxed state of the belt to the belt winding portion due to the winding body in the absence of tension on the base <br/> Le in which you are lowering the winding is rotated further winding body you can prevent reverse wound belts due to continue to rotate past the completion point beat winding belts.

According to the second aspect of the present invention, since the winding portion of the I <br/> Liber DOO the pressing member is always elastically pressed, no load the base <br/> Le preparative conditions in when hoist lowering can prevent the winding portion of the take-up of the belts without being affected by the increase or decrease of the belts of <br/> MakiSo径loosening been unwound, therefore, load raised load <br/> abrupt load belts of winding portion slips to the belts during beating is to be prevented from acting.

According to the third aspect of the present invention, the belt guide
The door slides over a standard range between the inside position and the outside position according to the increase or decrease in the winding diameter. Therefore, when beat winding and winding, belt always in a position hanging down winding body or al
It is possible to position the load hanging was heavy can be effectively prevented from acting on the Berutogai de, the durability of the Berutogai de together can be further enhanced, the belts by Berutogai de the contact resistance can further reduce, it is possible to perform winding and winding beat operation of the take-up of the belts even more smoothly. Moreover, when the length of the guide groove portion slightly longer than the standard range, the cases that perform a lateral pulling work of heavy through the belts, front and rear said belts is against the in each side plates when tilted in the direction, the Berutogai de along the guide groove portion, by moving beyond the normal range,
It made the inclination angle of the belts in the Berutogai de a gentle angle, while preventing twisting of the belts, the lateral pulling work with <br/> to the belts can be satisfactorily performed.

According to the fourth aspect of the present invention, the belt guide
Since it is possible to slide without rotating against the de to the side plates, when pulling out the lowering direction base <br/>: NetBackup in a state close to no load by the power from the winding side, rotation Berutogai de to, the Berutogai de and can effectively prevent the belts is inflated to between the winding body, it is possible to draw belts smoothly.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The belt type hoist shown in FIGS. 6 and 7 includes a pair of first and second side plates 1A and 1B opposed to each other at a predetermined interval. 1A is covered with a cover 2A and is capable of rotating forward and reverse, and the outer side of the second side plate 1B is covered with a cover 3A.
B and a reduction gear mechanism 3 provided with a mechanical brake 3C and the like are provided.

Between the side plates 1A and 1B, a flat belt 4 having a hook 40 attached to the distal end side is wound around the outer periphery of the side plate 1A, 1B. The body 5 is rotatably supported via a bearing, and a drive shaft 31 having a first gear of the reduction gear mechanism 3 is rotatably supported via a bearing inside the winding body 5. One end of the motor 31 is connected to a motor shaft 21 extending from the motor 2, and the motor 2 drives the motor 5 to rotate the winding body 5 forward / reverse via the motor shaft 21, the drive shaft 31 and the reduction gear mechanism 3. It is configured as follows.

Then, the take-up body 5 is rotated forward and reverse by the motor 2, and the belt 4 is taken up or down around the outer periphery of the take-up body 5, so that the hook 40 Unloading and unloading heavy goods locked in
Further, the belt 4 is unwound from the winding body 5 and the belt 4 is wound in a state where the hook 40 is locked to the heavy object, thereby performing the horizontal pulling operation of the heavy object. Like that.

In the embodiment shown in the figures, a pair of disk-shaped flanges 50, 50 are mounted on both sides of the winding body 5 in the longitudinal direction, and the flange 50 is provided between the flanges 50 on the outer periphery of the winding body 5. The belt 4 is wound. As shown in FIG. 7, a hook 1C made of a hook is attached to the upper side between the side plates 1A and 1B, and the winder 5 is rotated forward and reverse on the cover 3A. And an operation unit 1D.

In the above belt type hoisting machine, the belt 4 can be freely moved between the side plates 1A and 1B and along the path along which the belt 4 moves forward and backward with respect to the winding body 5. A belt guide 6 having a belt conducting portion 60 for guiding the conduction and preventing its twisting is supported, and the belt guide 6 is freely slid so as to allow the belt 4 to be wound around the winding body 5. Provide.

Specifically, as shown in the embodiment of FIGS. 1 to 5, each of the side plates 1 of the belt guide 6 is provided.
On both sides facing A and 1B, engaging projections 7 and 7 having a rectangular cross section protruding outward are provided, and the engaging projections 7 and 7 are provided on the side plates 1A and 1B. The guide strips 8, 8 are slidably inserted and extend over a standard range of at least an inner position hanging down from the minimum winding position of the winding body 5 and an outer position hanging down from the maximum winding position. I do.

In the embodiment shown in each of the drawings, a long hole extending in the horizontal direction so as to be orthogonal to the belt 4 hanging vertically from the winding body 5 is formed as each of the guide strips 8. When the belt 4 is wound down onto the winding body 5, the engaging projections 7 are moved along the long holes 8 to move the belt guide 6 between the inside position and the outside position. By sliding the belt 4 in the horizontal direction within the range, the belt 4 is guided by the belt guide 6 to take up and wind down the winding body 5.

Each of the guide strips 8 is formed at a position from the lower end of each of the side plates 1A and 1B supporting the winding body 5 at the center thereof. The belt guide 6 is supported via the engaging projection 7 such that the lower end thereof substantially coincides with the lower ends of the side plates 1A and 1B. At this time, the belt 4 guided by the conduction portion 60 of the belt guide 6 is used.
However, it is possible to prevent the belt 4 from being damaged by directly contacting the components of the hoisting machine, for example, the side plates 1A, 1B, etc. at the time of hoisting and lowering.
In particular, when performing a horizontal pulling operation of a heavy object via the belt 4, the belt 4 is attached to each side plate 1.
The belt 4 can be prevented from directly contacting each of the side plates 1A, 1B, although the belt 4 may be inclined in the left-right direction with respect to the direction in which the belts 4A, 1B are erected.
Can be reliably prevented.

Further, as shown in FIGS. 3 to 5, the belt guide 6 is provided on one side of a body 6A having the engaging projections 7, 7 protruding at both left and right ends, and spacers 6 on both left and right sides.
B, the guide plate 6 is fixed by two tightening screws 6C on the left and right sides.
D, the belt conducting portion 60 penetrating in the vertical direction is formed between the guide plate 6D and the body 6A.

The body 6A has a housing space 62 closed by a cover plate 61 on the back surface opposite to the belt conduction portion 60.
A belt slack detector 9 for detecting the slack of the conductive side belt portion 4A of the belt conductive to the belt conductive portion 60 in the accommodation space 62, and the motor being turned on by the operation of the belt slack detector 9 2 and a controller 10 composed of a limit switch for stopping the drive.

The belt slack detector 9 is provided on the movement path of the conductive side belt portion 4A and is a roller 91 which is free to roll and comes into contact with the conductive side belt portion 4A in a tension state.
And a roller support base 92 that movably supports the roller 1 over a predetermined range in the thickness direction of the conduction side belt portion 4A. The roller support base 92 is attached to the body 6A via two left and right horizontal shafts 93, 93. The roller 91 is swingably supported about a hook 94, and the roller 91 is in a direction between the roller support 92 and the free end of the horizontal shaft 93 such that the roller 91 always contacts the conduction side belt portion 4A. An elastic body 95 composed of a coil spring biasing the elastic member 95 is provided.

When the conductive side belt portion 4A is in tension as shown by the chain line in FIGS. 1 and 4, the roller 91 comes into contact with the conductive side belt portion 4A, and the roller support 92 is
5 and the controller 10 is off. When the conduction side belt portion 4A is relaxed as shown in FIG. 1 solid line and FIG. 5 from the tensioned state, the roller support base 92 urged by the elastic body 95 swings about the hook 94, and As a whole, the controller 10
Is turned on, and the drive of the motor 2 electrically connected to the controller 10 is stopped.

As described above, by inserting the belt 4 into the rectangular hole-shaped belt conducting portion 60 provided in the belt guide 6, both ends of the belt 4 in the width direction are connected to the conducting portion 60.
The belt 4 is a component of the hoisting machine,
For example, the belt 4 can be prevented from being damaged by directly contacting the side plates 1A, 1B and the like.

Each of the engaging projections 7 is slightly smaller than the minor diameter of each of the guide strips 8 and is movable along each of the guide strips 8. The belt guide 6 is formed into a quadrangular prism shape that cannot rotate with respect to the side plate 1 by slidingly inserting each of the engagement protrusions 7 into each of the long holes 8.
A and 1B cannot be rotated. In such a case, when the winding body 5 is rotated in the lowering direction by the motor 2 and the belt 4 is wound down in a state close to no load, the belt guide 6 rotates and the belt guide 6 and the winding body 5 are connected to each other. The belt 4 can be effectively prevented from swelling between them, and the belt 4 can be pulled out smoothly. Each of the engaging projections 8
May be formed in a non-circular shape such as a hexagonal shape or an elliptical shape other than the quadrangular shape.

Further, in the embodiment shown in FIGS. 1 and 2, at the position above the belt guide 6 between the side plates 1A and 1B and on the locus of movement of the belt 4, the winding body 5 is provided.
The pressing body 11 which is constantly urged in the outer circumferential direction of the belt 4 and presses against the winding portion of the belt 4 around the winding body 5 to prevent rewinding due to a slight elastic restoring action of the winding portion, and the rocking body 12 It is provided so as to be freely movable in the radial direction of the winding body 5 through the intermediate member.

The rocking body 12 has a support rod 1 at its base end.
3 and supports the pressing body 11 composed of a roll at the tip end via a pair of bearings so as to be freely rotatable. And
Both ends of the support rod 13 are rotatably supported by the side plates 1A and 1B, and the pressing body 11 is constantly wound between the swinging body 12 and the connecting rod 19 connecting the side plates 1A and 1B. A biasing spring 14 for biasing the pressing body 11 with the force of the biasing spring 14.
Is pressed against the winding part.

In this way, when the belt 4 is wound up and down without load, the winding portion of the belt 4 on the winding body 5 is rewound without being affected by the increase or decrease in the winding diameter of the belt 4. This can prevent the belt of the winding section from slipping during loading and unloading, thereby preventing a sudden load from acting on the belt.

The supporting rod 1 for supporting the rocking body 12
3 has one end protruding outward from the first side plate 1A, and the first and second protruding pieces 15, 16 are provided with a predetermined phase difference in the circumferential direction at the protruding end of the support rod 13. And a support rod 1 on the side plate 1A.
3, two first and second limit switches 1 which are actuated by contact with respective projecting pieces 15, 16 near the projecting portion 3
When the belt 4 is wound down to the maximum allowable length and the amount of winding of the belt 4 around the winding body 5 is reduced, the first limit switch 1
By operating the motor 7, the motor 2 is stopped to stop the lowering of the belt 4, and the winding amount of the belt 4 around the winding body 5 is increased with the winding of the belt 4. By moving the second limit switch 18 with the second projecting piece 16 when the motor 2 comes close,
Is stopped so that the winding of the belt 4 is stopped.

In the embodiment shown in each figure, a cover 1F for protecting the projecting pieces 15, 16 and the limit switches 17, 18 is provided outside the first side plate 1A.

Further, in the embodiment shown in FIG.
Forming a flat belt fixing surface 51 on a part of the outer periphery of
The fixed side end of the belt 4 is fixed to the belt fixing surface 51 via a pressing body 52 and a fixing screw 53.

Next, the operation of the above configuration will be described. When the belt 4 is wound and wound on the winding body 5, the belt 4 is movably inserted into the conducting portion 60 of the belt guide 6, and guided by the belt guide 6, 5, so that the belt 4 can be reliably prevented from being wound in a twisted state, that is, in a turbulent state,
The belt 4 can always be wound on the winding body 5 in a good posture, and damage due to irregular winding of the belt 4 can be prevented.

In addition, the belt guide 6 has engagement projections 7 on both sides thereof, and the side plates 1A, 1B are vertically suspended from the winding body 5 on the side plates 1A, 1B. Guide strips 8, 8 extending in the horizontal direction so as to be orthogonal to the belt 4, and into which the respective engaging projections 7 are inserted.
Are formed, and when the belt 4 is wound and wound on the winding body 5, the belt guide 6 is engaged with the engagement protrusion according to the increase or decrease in the winding diameter of the belt 4 on the winding body 5. The belt is slid horizontally over the standard range of the inside position and the outside position along each guide strip portion 8 through the portion 7, so that the belt guide 6 can reliably prevent the belt 4 from being twisted. 4 can be smoothly wound and unwound on the winding body 5.

At this time, in the embodiment shown in FIG. 1, each of the guide strips 8 is slightly longer than a standard range between the inside position and the outside position.
When the belt 4 is inclined in the front-rear direction with respect to the side plates 1A and 1B in a case where a horizontal pulling operation of a heavy object is performed through the belt guides 6 along the guide strips 8, Is moved out of the standard range, the inclination angle of the belt 4 at the belt guide 6 can be set to a gentle angle, and the twisting of the belt 4 can be prevented. Can be performed well.

Also, when the belt 40 is being lowered, if the hook 40 hits the ground or is caught by an obstacle during the lowering, the conduction side belt portion 4A at the time of lowering is relaxed. The roller support base 92 urged by the elastic body 95 swings around the hook 94, and the whole thereof comes into contact with the back surface of the body 6 </ b> A to turn on the controller 10 and stop driving the motor 2. Therefore, it is possible to prevent the winding member 5 from rotating around the belt winding portion due to the belt loosening state due to the rotation of the winding member 5 in a state where the belt 4 being lowered has no tension. It is possible to prevent the belt 4 from being reversely wound by continuing to rotate beyond the lowering completion point.

In the embodiment described above, the elongated holes are formed in the side plates 1A and 1B as the guide line portions 8 for guiding the engagement projections 7 to be inserted and fitted. However, the present invention is not limited to this. For example, the engaging protrusion 7 may be provided along a sliding direction, and the engaging protrusion 7 may be formed of a groove slidable in the above-described range. Further, the guide strips 8 are formed in the horizontal direction so as to be orthogonal to the belt 4 hanging vertically from the winding body 5, but the guide strips 8 are not necessarily limited to the horizontal direction. Instead, it can be formed so as to be slightly inclined with respect to the horizontal direction. In short, the guide strip 8 slides with the increase or decrease of the belt winding diameter, and the belt 4 slides during this sliding. The belt 4 is formed so as to be able to smoothly and satisfactorily take up and take down the belt 4 without hindering the take-up and take-down operation on the take-up body 5.

Further, as described above, the engagement protrusion 7 is formed on the belt guide 6, and the guide strip 8 into which the engagement protrusion 7 is inserted is formed on each of the side plates 1A and 1B. However, the engagement protrusion 7 may be formed on the side plates 1A and 1B, and the guide strip 8 may be formed on the belt guide 6.

In the above-described embodiment, the pressing body 11 is supported by the swinging body 12 to press the winding portion of the belt 4. However, the winding body 5 may be pressed against the urging spring. May be provided so as to be freely movable in the radial direction, and the winding portion may be constantly elastically pressed.

Further, in the above embodiment, the motor 2 is used as the driving means for driving the winding body 5.
Similar to the lever type chain block or the hand chain type chain block, the winding body 5 may be driven using a manual lever or a hand chain.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a belt-type hoist according to the present invention.

FIG. 2 is a rear view of the same.

FIG. 3 is a front view in which a belt guide and a part of a belt slack detector are omitted.

FIG. 4 is a sectional view taken along line XX of FIG. 3;

FIG. 5 is a sectional view taken along line YY of FIG. 3;

FIG. 6 is a partially cutaway plan view of the belt-type hoist.

FIG. 7 is a rear view showing the entire structure of the hoist.

[Explanation of symbols]

 1A, 1B Side plate 4 Belt 5 Winding body 6 Belt guide 60 Belt conducting section 7 Engagement projection 8 Guide strip 9 Belt slack detector

Continuation of the front page (56) References JP-A-57-23405 (JP, A) JP-A-3-88697 (JP, A) JP-A-7-31787 (JP, U) JP-A-63-58081 (JP , U) Japanese Utility Model Application 63-200591 (JP, U) Japanese Utility Model Application Hei 4-135583 (JP, U) Japanese Utility Model Application Utility Model 53-12176 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB) Name) B66D 1/00-5/34

Claims (4)

(57) [Claims] 1. A belt type hoisting machine comprising a winding body for winding a belt rotatably supported between side plates facing each other, wherein a belt guide having a belt conduction portion between the side plates is provided. Is slidably provided so as to allow a winding operation of the belt on the winding body, and the belt gear is moved from the winding body.
To detect belt slack in the path of movement of the belt to the id.
A belt slack detector that emits
The belt is empty on the opposite side of the belt from the belt conduction section.
The belt loosening detector is housed in the housing space.
Belt hoist, characterized in that are. 2. A winding part is provided on a winding path of a belt around a winding body.
Always elastically press the belt inward in the radial direction
The belt-type hoist according to claim 1, further comprising a pressing body . 3. One of a side plate and a belt guide
, An engaging projection is provided, and the other is engaged with the engaging projection,
At least the inner position hanging down from the minimum winding position of the winding body
Between the maximum winding position and the outer position
The belt-type hoist according to claim 1, further comprising a guide strip extending over the belt. 4. A belt guide having a non-circular engaging projection.
The belt-type hoist according to claim 3 , wherein the roller is not rotatable with respect to the side plate .