KR20000061825A - Lifter - Google Patents

Abstract

PURPOSE: A lifter is provided to prevent articles and projectors from falling during lifting up and down and to promote reduction in manufacturing cost. CONSTITUTION: A main shaft(510) rotates as a motor(200) operates in a specific direction. A band type rope coiled on the central outer circumference of the main shaft(510) is released and a main case descends thereby. The main case(100) does not descend in a perpendicular direction of its movement by contact between guide bars on the four edges of the main case and a guide rail on the ceiling. A spring(620) on the outer circumference of a sub-shaft(610) is already distorted by rotation of the main shaft(510) and influenced by a force for reverse rotation. Therefore, the load of the main case and a projector is supported through the distortion force.

Description

Lifter {Lifter}

TECHNICAL FIELD The present invention relates to a lifter, and more particularly, to a lifter for storing an expensive article such as a projector and the like on the ceiling wall without being exposed to the outside.

In general, the lifter is used to move a very heavy article, etc., and is used in a wide variety of aspects.

In other words, general factories are used for the movement of heavy machinery, and in recent years, they are enlarged on the screen so that a large number of people can watch on a large screen in meeting places such as schools or churches. It is used for raising and lowering a projector which displays a displayed image.

The most important factor in this lift is the small capacity motor that allows the product to move up and down smoothly.

However, since the conventional lift uses a motor in consideration of the weight of the article and the total weight of the brackets on which the article is mounted, a large-capacity motor is used, and thus there is a problem in that the production cost increases.

On the other hand, the lifter for raising and lowering the projector is typically installed in the ceiling wall of the meeting place, such as school or church, so that the projector is stored on the wall so as not to be exposed to the outside.

This is because the projector is a very expensive item in order to prevent the risk of theft in advance, and when the projector is exposed to the outside, it not only hurts the aesthetics but also has a problem in that the space cannot be utilized efficiently.

In this way, the lifter for raising and lowering the projector to the ceiling wall only serves to lift and lower the projector and the case in which the projector is stored. Therefore, flow is generated during the lifting and lowering process to contact the ceiling wall. There is a risk of the projector falling down, and there is a problem that the production cost increases by using a motor in consideration of the weight of the projector and the case.

The present invention was created in order to solve such problems in the related art, and it is possible to easily lift and lower the projector as well as the general article to the ceiling wall, and in particular, the fall of the article and the projector by the flow during the lifting and lowering process. It is an object of the present invention to provide a lifter which can prevent the occurrence of oil and reduce the production cost.

1 is an exploded perspective view of the main parts extract of the lifter according to the present invention;

2 is a sectional view of the combination of the litter according to the present invention,

Figure 3 is a perspective view showing an extract of the flow prevention means in the present invention,

4 is an enlarged side cross-sectional view of the main portion excerpt of FIG.

<Explanation of symbols for main parts of drawing>

100: main case 110: top panel

120: lower panel 200: motor

300: projector 400: (ceiling) bottom

500: conveying means 510: main shaft

520: rope 530: cap

600: load supporting means 610: sub shaft

620: spring 700: flow preventing means

710: guide bar 720: guide rail

800: brackets

In order to achieve the above object, the lifter according to the present invention is provided with an accommodating space so as to seat a predetermined article therein in moving and storing the article in an up and down direction on the ceiling wall of the building. A main case which is optionally stored and taken out to the ceiling wall inside the building; A motor located inside the ceiling wall; A conveying means rotationally driven by the motor to convey the main case and the articles stored therein by sliding upward and downward toward a ceiling wall; Load supporting means for supporting an overall load of the main case which is slid up and down by the transfer means to prevent the motor from being overloaded; It characterized in that it comprises a; flow preventing means for preventing the flow in the direction perpendicular to the sliding conveyance direction of the main case which is slid up and down by the conveying means.

One preferred feature of the present invention, the conveying means is coupled to the shaft of the motor is driven to rotate, the inner surface of the hollow shaft to form a hollow space; The rope is wound a predetermined number of times to the outer side of the case, one end is coupled to the central upper surface of the main case;

According to another preferred aspect of the present invention, the load supporting means includes: a sub shaft extending from the other ceiling wall surface facing the motor to an inner side of a space of the main shaft constituting the conveying means; A spring interposed on the sub shaft, one end of which is fixed to a free end of a surf shaft, and the other end of which is fixed to the other inner surface of the main shaft to receive a force for raising the main case according to the rotation of the case; It is in the old.

Another preferred feature of the present invention, the flow preventing means, is provided to surround each of the four corners of the case, a plurality of guide bars extending toward the ceiling wall surface; And a guide rail extending on the ceiling wall surface corresponding to the guide rail and provided to surround side surfaces of the guide rail from both sides.

Hereinafter, preferred embodiments of the lifter according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is an exploded perspective view of the main portion extract of the lifter according to the present invention, Figure 2 is a cross-sectional view of the combined lifter according to the present invention, Figure 3 is a perspective view showing the exclusion of the flow prevention means in the present invention. 4 is an enlarged side cross-sectional view of the main portion excerpt of FIG.

In the following description, a lifter for the projector will be described as an example, and in particular, an example for lifting and lowering the projector to the ceiling wall inside the building will be described.

As shown therein, the lifter according to the present invention is largely divided into a main case 100, a motor 200, a transfer means 500, a load supporting means 600, and a flow preventing means 700. It is rough.

The main case 100 is formed of a plurality of panels 110 and 120, that is, an upper panel 110 and a lower panel 120 provided to maintain a predetermined interval in the up and down directions as illustrated. ), And an article to be lifted and lowered into the space between the upper panel 110 and the lower panel 120, that is, the bottom surface of the lower panel 120, that is, the projector 300 is seated.

The motor 200 is installed in the ceiling bottom surface 400 and is a driving source for raising and lowering the main case 100 on which the projector 300 is seated.

The conveying means 500 is for raising and lowering the main case 100 in the up and down directions by using the motor 200 as a driving source, and the detailed structure thereof includes a main shaft 510 and a rope. (rope; 520).

The main shaft 510 is rotated by being coupled to the shaft of the motor 200, and an inner surface thereof penetrates to form a hollow space portion, and caps 530 are selectively coupled to both penetrating side surfaces thereof. Lose.

The rope 520 is wound a predetermined number of times on the outer peripheral surface of the center of the main shaft 510, one end of which is fixed to the center surface of the main shaft 510, as shown in FIG. 4, and the other end of the rope 520 extends downward. It is coupled to the central upper surface of the (100).

Therefore, the main shaft 510 rotates in the forward and reverse directions to serve to raise or lower the main case 100.

In this case, the rope 520 is not a generally used wire type, but a band type.

That is, as shown in FIGS. 2 and 4, a metal band having a very thin thickness and width is used.

As such, when the metal band is used as the rope 520, when the wire type rope is used, the central band is not wound on the outer peripheral surface of the center of the main shaft 510, but is wound along the longitudinal direction. This is because the shift causes left and right flow of the main case 100.

Accordingly, when using the metal band rope 520, the central axis is not misaligned, thereby effectively preventing the flow.

The load supporting means 600 serves to sufficiently reduce the capacity of the motor 200 by sufficiently supporting the load of the main case 100 and the projector 300 seated thereon.

Looking at the structure of the load supporting means 600, from the other ceiling wall surface 400 facing the motor 200 toward the center inner surface of the main shaft 510, that is toward the inside of the space (sub shaft; 610 is formed to extend a predetermined length.

A spring 620 is positioned on the outer circumferential surface of the shaft 610, and one end of the spring 620 is fixed to the free end side of the sub shaft 610, and the other end is fixed to the other inner surface of the main shaft 510. .

Therefore, the spring 620 is torsionally based on a fixed portion when the main shaft 510 is rotated, and the main case is exerted by exerting a force to rotate the main shaft 510 in one direction through the reaction force against the torsion. It is to support the load of the entire 100 and the projector 300.

The flow preventing means 700 prevents the main case 100 from flowing in a direction perpendicular to the conveying direction during the up and down process, thereby preventing a collision between the main case 100 and the ceiling bottom surface 400. Do it.

Looking at the structure of the flow preventing means 700, the four corners of the main case 100, that is, the guide bar (guide bar; 710) is fixed to each.

At this time, the guide bar 710, at the same time serves to fix the position so as to maintain the upper and lower panels 110, 120 constituting the main case 100 to a predetermined interval.

In addition, the guide rails 720 are formed on the ceiling bottom surface 400 corresponding to the guide bars 710 so as to surround the guide bars 710.

That is, the main case 100 is to prevent the flow by the guide bar 710 is slid up and down along the guide rail 720.

In this case, the guide bar 710 should always be in contact with the guide rail 720 if the length of the guide bar 710 is to be changed.

Unexplained reference numeral 800 is brackets installed on the ceiling bottom surface 400.

Referring to the operation of the lifter according to the present invention configured as described above are as follows.

First, when the motor 200 operates in any one direction, the main shaft 510 is rotated.

By the rotation of the main shaft 510, the band-shaped, ie, band-type rope 520 wound around the center outer peripheral surface of the main shaft 510 is in the unwinding direction, and the main case 100 descends.

At this time, during the lowering operation of the main case 100 is perpendicular to the downward direction by the contact between the guide bar 710 provided on the four corners of the main case 100 and the guide rail 720 formed on the ceiling bottom surface 400. Will not flow in any direction.

On the other hand, at this time, the spring 620 provided on the outer circumferential surface of the sub shaft 610 is subjected to the force to rotate in the reverse direction because it is in a state of being twisted by the rotation of the main shaft 510. Therefore, the torsional force supports the load of the main case 100 and the projector 300 seated thereon.

In this case, when the main case 100 is to be raised again in the lowered state, when the main shaft 510 is reverse driven by the reverse driving of the motor 200, the main shaft 510 is opposite to the above-described operation. The main case 100 and the projector 300 seated thereon are lifted up to be completely accommodated on the ceiling bottom surface 400 because the rope 520 is wound while being rotated in the direction.

At this time, even when the main case 100 is raised, the flow does not occur due to the contact between the guide bar 710 and the guide rail 720.

In addition, smooth operation is achieved using a smaller capacity of the motor 200.

That is, since the main force of the motor 200 requires only a capacity for rotating the main shaft 510 and a force capable of maintaining the spring 620 in a torsional state.

On the other hand, the above-described embodiment is only a description of one preferred embodiment of the present invention, the scope of the present invention is not limited to such, it is appropriately modified within the scope of the same idea. For example, the shape and structure of each component shown in the embodiment of the present invention can be modified.

As described above, according to the lifter according to the present invention, the article, for example, the projector can be stably up and down of the main case on which the projector is seated without flow. Enough power can be obtained to raise and lower the main case.

Therefore, the use of a small capacity motor is achieved to reduce the production cost, there is an advantage that can improve the reliability of the entire lifter by preventing the flow.

Claims (5)

In the storage and take-out by moving the goods in the up and down direction to the ceiling wall inside the building, An accommodating space part provided on the inside so as to mount a predetermined item, and optionally a main case accommodating and taking out to the ceiling wall inside the building; A motor located inside the ceiling wall; A conveying means rotationally driven by the motor to convey the main case and the articles stored therein by sliding upward and downward toward a ceiling wall; Load supporting means for supporting an overall load of the main case which is slid up and down by the transfer means to prevent the motor from being overloaded; And a flow preventing means for preventing flow in a direction perpendicular to the sliding conveying direction of the main case which is slid up and down by the conveying means. According to claim 1, The conveying means is coupled to the shaft of the motor is driven to rotate, the inner surface of the hollow shaft to form a hollow space; Lifter is wound a predetermined number of times to the outer surface of the case, one end is coupled to the upper surface of the center of the main case. 2. The load supporting means of claim 1, further comprising: a sub shaft extending from the other ceiling wall surface facing the motor to an inner side of a space of the main shaft constituting the transfer means; A spring interposed on the sub shaft, one end of which is fixed to a free end of the sub shaft, and the other end of which is fixed to the other inner surface of the main shaft to receive a force for raising the main case according to the rotation of the case; Lifter characterized in that. According to claim 1, wherein the flow prevention means, and provided to surround each of the four corners of the case, a plurality of guide bars extending toward the ceiling wall surface; And a guide rail extending on the ceiling wall surface corresponding to the guide rail and provided to surround side surfaces of the guide rail from both sides. The lifter according to claim 2, wherein the rope is formed of a thin plate-like metal having a predetermined width and thickness and wound on the main shaft a predetermined number of times.