JPH0611284Y2 - Lifting gear - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a suspending tool used for suspending a lightweight object such as a fluorescent lamp box with a wire or a bar on a ceiling or the like in a store, and particularly, a suspending tool. This is a device that has been devised to attach the holding fixture to the ceiling panel and the like.

[Conventional technology]

Examples of this type of lifting device include, for example, Shoukai 57-107.
472 and Japanese Utility Model Laid-Open No. 59-182808. There, a wire for suspending an object to be hung is inserted into a taper cylinder, and at least one pair of balls is movably built in the taper cylinder, and the upper end of the wire is clamped and fixed between the balls. ing.

Then, in order to mount such a suspending tool on the ceiling, in the former example of the former (Actual Publication No. 57-107472), the mounting piece is fixed to the outer surface of the ceiling panel with a few screws, and this mounting is performed. The hanger is integrally connected to the piece,
In the latter one (Japanese Utility Model Laid-Open No. 59-182808), the suspending tool is penetrated through the ceiling panel, and the upper end of the suspending tool projecting to the back side of the ceiling panel is fixed to the horizontal member behind the ceiling.

[Problems to be solved by the invention]

However, among the above-mentioned conventional means for attaching to a ceiling panel, the work of tightening several screws one by one as in the former is extremely troublesome, and since it is an upward work, fatigue is great. Also, the latter requires work behind the ceiling, which is not easy.

An object of the present invention is to provide a suspending tool that can be easily and quickly attached by a work from only one direction on the outer surface side of a ceiling panel or the like.

[Means for solving problems]

This invention has a male screw 7 at the upper end thereof and a rotary shaft cylinder 11 into which a wire or bar 3 is inserted, and a clamp that allows the wire or bar 3 to be pushed upward but prevents the wire or bar 3 from being pulled downward. The hanging tool main body 4 including the means 12 is configured.

A thrust bearing 5 for holding an upward thrust load acting on the rotary shaft cylinder 11 is fitted on the outer periphery of the rotary shaft cylinder 11 of the lifting device main body 4 configured as described above. And the rotating shaft cylinder 1
A rubber tube 28 is inserted in a non-rotating manner on the outer periphery of the male screw 7 projecting upward from the thrust bearing 5 of No. 1, and
The nut 29 integrally formed inside the rubber cylinder 28 near the upper end of the rubber cylinder 28 is rotated by the rotation of the rotary shaft cylinder 11 in the tightening direction.
It is screwed onto the male screw 7 so as to move downward in a screwed manner.

[Action]

In the above structure, the rubber cylinder 28 is inserted into the mounting hole 30 formed in the ceiling panel 1 or the like from the lower side of the outer surface so as to penetrate to the back side of the panel 1, and the rotary shaft cylinder 11 is rotated in the tightening direction with a screwdriver or the like. Then, the rotary shaft cylinder 11 rotates in the thrust bearing 5, the nut 29 does not rotate, and moves downward on the male screw 7, and as the nut 29 moves, the rubber cylinder 28 receives a compressive load and radially moves. Bending deformation is applied to the outwardly protruding shape, the bending deformation portion of the rubber cylinder 28 engages with the ceiling backside of the mounting hole 30 of the ceiling panel 1, and the lifting tool is pulled out downward from the mounting hole 30. A state without

Further, when the rubber cylinder 28 is inserted into the mounting hole 30 to a depth so that the rotary shaft cylinder 11 is tightened and rotated as described above, the rubber cylinder 28 moves downward on the male screw 7 of the nut 29. As the screw moves, it receives a compressive load and expands and deforms in the radial direction to generate a fitting pressure on the contact surface of the mounting hole 30 with the inner surface, so that a retaining state is achieved.

[Effect of the Invention] According to the lifting tool of the present invention, the rotating shaft cylinder 11 that allows the wire or bar 3 to be pushed upward and prevents the downward movement of the rotary shaft cylinder 11 is provided. While it is rotatably held by the thrust bearing 5,
The rubber cylinder 28 is inserted into the outer periphery of the male screw 7 of the rotary shaft cylinder 11 protruding upward from the thrust bearing 5 in a non-rotating manner, and the nut 2 integrally formed inside the rubber cylinder 28 near the upper end thereof.
Since 9 is screwed to the male screw 7, the rubber tube 28 is inserted into the mounting hole 30 provided in the panel 1 to attach the hanging tool 2 to the ceiling panel 1 or the like, and the rotary shaft tube 11 is attached. There is an advantage in that it is a simple work of turning, and this work is sufficient only from one direction on the outer surface side of the ceiling panel 1 or the like, and significant labor saving can be achieved.

[Embodiment 1] FIGS. 1 to 3 of the first embodiment of the lifting device according to the present invention.
A description will be given based on the figure.

In FIG. 1 to FIG. 3, 1 is a ceiling panel in a store or the like, 2 is a suspending tool of the present invention attached to the ceiling panel 1, 3 is a wire, the upper end of which is fixed to the suspending tool 2 and fixed to the lower end. A suspended article 31 such as a lightweight fluorescent light box is stopped.

The lifting tool 2 is composed of a lifting tool body 4, a thrust bearing 5 that rotatably holds the lifting tool body 4, and a blind fastener 6 that fastens and fixes the lifting tool body 4 to the ceiling panel 1.

The lifting device main body 4 has a large-diameter cylindrical portion 9 having a larger diameter than that of a small-diameter cylindrical portion 8 provided with a male screw 7 on the outer periphery thereof, which is integrally connected through a stepped seat surface 10. A rotary shaft cylinder 11 is formed, and a clamp means 12 is incorporated inside the large diameter cylinder portion 9.

As the clamping means 12, a taper inner cylinder 14 which is fixed inside the large-diameter cylinder 9 and has an upwardly expanding tapered hole 13 is formed.
And a clamp member 15 consisting of three steel balls inscribed in the tapered hole 13 and a clamp tube 16 for holding the clamp member 15.
Consists of. The clamp tube 16 is formed by vertically penetrating an insertion hole 17 through which the wire 3 can be inserted, and
An inverted conical portion 18 that is inscribed in the tapered hole 13 is formed on the outer periphery thereof, and three clamp element holes 1 that hold the clamp elements 15 in the inverted conical portion 18 so as to be retractable in the radial direction, respectively.
9 is formed to penetrate in the radial direction. A spring 20 is interposed between the inner upper surface of the large-diameter cylindrical portion 9 and the upper end of the clamp cylinder 16, and the clamp cylinder 16 is always urged downwardly against the inner surface of the tapered hole 13 by the spring action.

An operation groove 21 for inserting a tool such as a screwdriver is formed in the radial direction on the lower end surface of the tapered inner cylinder 14 integrally fixed to the rotary shaft cylinder 11. Further, a lower end portion 16a for a clamp releasing operation, which is integrally formed in a lower portion of the inverted conical portion 18 of the clamp cylinder 16, is made to project downward from a lower end surface of the tapered inner cylinder 14.

The thrust bearing 5 forms a cylindrical portion 22 surrounding the outer circumference of the large diameter cylindrical portion 9 of the rotary shaft cylinder 11, and an upper bottom 23 that receives the stepped seat surface 10 of the large diameter cylindrical portion 9 at the upper end of the cylindrical portion 22. And a hole 24 for projecting the small diameter cylindrical portion 8 upward is formed in the center of the upper bottom 23, and a flange 25 is integrally formed so as to project from the middle portion of the outer periphery of the cylindrical portion 22 in the vertical direction. Upper base 2
A plurality of sharp projections 26 and 27 are provided on the upper surfaces of 3 and the flange 25, respectively.

The blind fastener 6 is formed by integrally molding a nut 29 near the upper end inside a rubber tube 28 made of chloroprene rubber (trade name neoprene rubber). In this blind fanner 6, a rubber cylinder 28 is inserted into the small diameter cylindrical portion 8 of the rotary shaft cylinder 11 and a nut 29 is screwed into the male screw 7, and the lower end bearing surface 28a of the rubber cylinder 28 is attached to the upper bottom 23 of the thrust bearing 5. By piercing the sharp protrusion 26, the rubber cylinder 28 is coupled to the upper end surface of the thrust bearing 5 in a rotation preventing manner.

Next, an explanation will be given of how to attach the lifting tool 2 thus configured to the ceiling panel 1. A vertically penetrating mounting hole 30 is formed in a desired position of the ceiling panel 1 in advance. First, the rubber tube 28 of the lifting tool 2 is inserted into the mounting hole 30 from below. At this time, when the flange 25 of the thrust bearing 5 contacts the outer surface of the ceiling panel 1 and is inserted until the sharp protrusion 27 is pierced into the ceiling panel 1, the rubber tube 28 is attached to the mounting hole 30.
It is possible to obtain a state in which the upper part of the flange 25 of the thrust bearing 5 is inserted into the mounting hole 30 while completely passing through the above and protruding to the back surface side of the ceiling panel 1 (see FIG. 1). Then, insert a screwdriver or the like into the operation groove 21 and rotate the rotary shaft cylinder 1.
When 1 is rotated in the tightening direction, the upward thrust load acting on the rotary shaft cylinder 11 is received on the inner surface of the upper bottom 23 of the thrust bearing 5, the rotary shaft cylinder 11 rotates at that position, and the nut 29 does not rotate. Move downward on the male screw 7. Along with the downward movement of the nut 29, the rubber cylinder 28 receives a compressive load and is bent outwardly so as to be buckled on the back surface of the ceiling panel 1 (see FIG. 2). Therefore, the suspending tool 2 does not come out downward from the mounting hole 30 due to the protruding portion F (see FIG. 2) of the rubber cylinder 28 thus buckled, and between the protruding portion F and the flange 25. Thus, a fastening and fixing state in which the ceiling panel 1 is sandwiched is obtained.

In order to attach the wire 3 to the lifting tool 2 attached in this way, the upper end of the wire 3 is inserted into the lower end 16a of the clamp barrel 16, and the upper end of the wire strikes the clamp 15 and resists the spring 20 to cause the clamp barrel. 16 is pushed up, the space between the clamps 15, 15 is expanded along the inner surface of the tapered hole 13, and the wire 3 is clamped by the clamps 15, 15.
The space can be pushed upward to a predetermined height. When the pushing of the wire 3 is stopped, the clamp cylinder 16 is pushed down by the force of the spring 20 into a narrow space in the tapered hole 13 in a wedge shape, and the space between the clamp members 15 and 15 is narrowed. The wire 3 is clamped. Under this condition, when the suspended article 31 is stopped at the lower end of the wire 3, the wire 3 is pulled down and a load is applied to the clamp element 1.
The wire 5 further strongly clamps a part of the peripheral surface of the wire 3.

When adjusting the hanging height of the suspended article 31, the lower end portion 16a of the clamp barrel 16 is grasped and the clamp barrel 16 is pushed upward against the spring 20.
The space between the wires 5 is widened, and the wire 3 can be freely moved up and down between them.

[Second Embodiment] FIG. 4 shows a second embodiment of the present invention. In this embodiment, the structure of the lifting tool 2 itself is exactly the same as that of the lifting tool 2 of the first embodiment, but the mounting form thereof is such that the rubber tube 28 is inserted from the mounting hole 30 of the ceiling panel 1 in the first embodiment. In the present embodiment, the rubber cylinder 28 is inserted into the blind mounting hole 30, whereas the thrust bearing is inserted in this state in the same manner as in the first embodiment. By rotating the rotary shaft cylinder 11 in the tightening direction in
8 is subjected to a compressive load of the nut 29 to be expanded and deformed in the radial direction so as to be fitted to the contact surface with the inner surface of the mounting hole 30 to generate a pressure. In this embodiment, if a suspending load is applied to the suspending tool 2, the rubber cylinder 28 and the mounting hole 3 thereof are attached.
The strong frictional force generated between the contact surface with the inner surface of 0 resists the strong frictional force, so that the mounting hole 30 can be prevented from coming off downward.

[Embodiment 3] FIG. 5 shows a third embodiment of the present invention. In this embodiment, the means for attaching the lower end bearing surface 28a of the rubber cylinder 28 to the thrust bearing 5 in a non-rotating manner differs from that of the first embodiment, and the rest of the construction is the same as that of the first embodiment.

As means for preventing the rubber cylinder 28 from rotating in this embodiment, a flange 32 is sandwiched between the ceiling panel 1 and the flange 25 of the thrust bearing 5 at the lower end of the rubber cylinder 28 to prevent the rubber cylinder 28 from rotating. is there.

[Embodiment 4] FIG. 6 shows a fourth embodiment of the present invention, in which a thin bar 3 is used instead of the wire 3 in the first embodiment, and a concrete example of the clamp means 12. The structure is different, and the rest of the structure is the same. Clamping means 1 of this embodiment
2 forms a flat washer-shaped clamp element 15 made of a material harder than the bar 3, the outer diameter of which is smaller than the inner diameter of the large diameter cylindrical portion 9 of the rotary shaft cylinder 11 and the diameter of the central engagement hole 33. Is larger than the diameter of the bar 3. This clamp 15
Is mounted inside the large-diameter cylindrical portion 9 in a freely floating state so as to freely change to an orthogonal or oblique posture with respect to the axis of the bar 3, and the lower surface side of the clamp 15 is a clamp fixed to the large-diameter cylindrical portion 9. It is received by the receiver 34. The clamp receiver 3
A clamp receiving surface 34a is formed in an inclined shape at the upper end of 4,
At a point P on the receiving surface 34a, a part of the lower circumferential surface of the clamp 15 is received and supported in an inclined posture. The inclination posture of the clamp element 15 on the receiving surface 34a is biased by the pushing force of the spring 20 arranged above the clamp element 15. In addition, in the gap between the inner circumference of the clamp receiver 34 and the bar 3, a tubular release member 36 is vertically movably provided along the bar 3 in a retaining manner.

At this time, when the upper end of the bar 3 is inserted into the suspending tool 2 from below, the upper end hits the lower edge of the engaging hole 33 of the clamp 15 and pushes it up slightly against the spring 20. Then, the bar 3 can be pushed further upward into the engaging hole 33. When the pushing of the bar 3 is stopped, the clamp member 15 is pushed down to the original inclined posture by the force of the spring 20, and the hole edge of the engaging hole 33 is twisted and engaged with the peripheral surface of the bar 3 to pull down the bar 3. It strongly resists force and prevents the bar 3 from coming out downward. When a suspended article (not shown) is fixed to the lower end of the bar 3 and a downward load due to this weight is applied, the bite of the hole edge of the clamp 15 with respect to the peripheral surface of the bar 3 is further enhanced, and the bar 3 moves. Firmly prevent the descent.

When pulling out the bar 3, when the release member 36 is pushed up and the clamp 15 is changed to the horizontal posture, the state in which the clamp 15 is bitten into the bar 3 is released, and the bar 3 is freely moved upward or downward. Therefore, the hanging height of the article to be held can be arbitrarily adjusted.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 3 show a first embodiment of the present invention. FIG. 1 is a vertical cross-sectional view of a lifting tool showing a state before fastening, and FIG. 2 is fastening. FIG. 3 is a vertical cross-sectional view of the lifting device showing a state after that, and FIG. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4 is a vertical cross-sectional view of a suspending tool before fastening showing a second embodiment of the present invention. FIG. 5 is a vertical cross-sectional view of a lifting tool before fastening showing a third embodiment of the present invention. FIG. 6 is a vertical cross-sectional view of a lifting tool before fastening showing a fourth embodiment of the present invention. 1 ... Ceiling panel, 2 ... Lifting tool, 3 ... Wire or bar, 4 ... Lifting tool body, 5 ... Thrust bearing, 7 ... Male screw, 11 ... Rotating shaft cylinder, 12 ... Clamp Means, 28 ... Rubber tube, 29 ... Nut, 30 ... Mounting hole, 31 ... Suspended article.

Claims (1)

[Scope of utility model registration request] 1. A rotary shaft cylinder 1 having a male screw 7 on its upper end side.
Insert the wire or bar 3 into the inside of 1,
A lifting device main body 4 incorporating a clamp means 12 for permitting upward movement of the wire or bar 3 but for preventing downward movement of the wire or bar 3; for holding an upward thrust load acting on the rotary cylinder 11. The thrust bearing 5 fitted onto the rotary shaft cylinder 11
A rubber cylinder 28 which is inserted into the outer circumference of the male screw 7 of the rotary shaft cylinder 11 protruding above the thrust bearing 5 and which is supported on the outer end surface of the thrust bearing 5 in a non-rotating manner; And a nut 29 which is integrally formed inside the upper end of the rotating shaft cylinder 11 and is screwed onto the male screw 7 so as to move downward on the male screw 7 by the rotation of the rotating shaft cylinder 11 in the tightening direction.