JP4043563B2 - lift device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevating device for vertically moving an illumination lamp or the like for night illumination.
[0002]
[Prior art]
Conventionally, an elevating device has been used to hold an illuminating lamp, an antenna, or the like at a high place, or to hold an adjustable vertical position. Among the conventional lifting devices, the most basic ones are as shown in FIG. 4, a telescopic pipe group consisting of a plurality of pipes fitted telescopically, and an upper end of the innermost pipe of this pulp group. An elevating device comprising a connected flexible rack and a device for moving the rack up and down.
[0003]
Hereinafter, the conventional lifting apparatus shown in FIG. 4 will be briefly described.
Reference numeral 51 denotes a telescopic pipe group. The pipe group 51 includes four pipes 511, 512, 513, and 514 fitted telescopically, and a coil spring-like flexible rack 52 is formed at the lower end of the innermost pipe 514. The top ends are connected. 53 is a vertical movement device of the flexible rack 52, 54 is a housing drum of the flexible rack 52, and 55 is a held object such as a lamp provided at the upper end of the innermost pipe 514.
[0004]
The vertical movement device 53 includes a worm 57 rotated by a handle 56, a worm gear 58 meshed with the worm gear 57, a gear 58 ′ meshed with the worm gear 58, and the same axis as the worm gear 58. It comprises a gear 59 provided on the line, and a gear 59 'provided on the same axis as the gear 58'. The gears 59 and 59 'act as a pinion for moving the flexible rack 52 up and down.
[0005]
[Problems to be solved by the invention]
The above-described conventional lifting device includes various types ranging from a large one installed on the ground to a small one mounting an antenna or an illumination lamp on the automobile. For example, in the case of a lifting device for installation on the ground, only the accommodation drum 54 of the flexible rack 52 and the rack vertical movement device 53 are assembled as an integral unit, and the telescopic pipe group 51 is attached and used at the destination. desirable.
[0006]
Further, when the flexible rack 52 is pushed up, when the elastic pipe group 511 as the uppermost stage and the appropriate number of pipes to be pushed up to some extent are pushed up to some extent, the flexible rack 52 has a direction opposite to the pushing-up force due to its own weight. It receives force and is distorted by the flexibility of the flexible rack 52 and tries to meander in the pipe. In this case, since it is a problem of the strength of the flexible rack, it can be solved by increasing the diameter of the flexible rack, but then the diameter of the lifting device such as a drum that winds up and stores the flexible rack will increase dramatically, The overall scale is undesirably large.
[0007]
In addition, the guide structure of the telescopic pipe group itself is not sufficient, and therefore, galling may occur or the vertical movement may not be performed smoothly.
Moreover, if there is only one type of pipe length, the maximum height is determined, and the range of use is limited.
In addition, maintenance and inspection inside each pipe has not been easy due to the intrusion of rainwater traveling through the pipe.
[0008]
Therefore, the present invention eliminates the above-mentioned problems, makes it easy to attach and detach the innermost pipe and the flexible rack, and makes it easy to attach and detach between the pipes, thereby suppressing the meandering of the flexible rack. The purpose is to provide.
[0009]
[Means for Solving the Problems]
[1] In the lifting device according to the first aspect, the pipes 1, 2, 3, and 4 are not separated from each other by the detachable caps 11, 13, and 15, and the pipes 1, 2, 3, and 4 are disposed inside the pipes. Is fixed to the middle pipes 12, 14, 16 through which flexible racks (special winding springs) (hereinafter referred to as springs) 35 can be inserted, and the diameter of the middle pipes 12, 14, 16 from the pipe 12 of the uppermost stage. Each middle pipe can be inserted into the middle pipe of the upper pipe in such a manner that the pipes become smaller in order.
[0010]
When assembling the lifting device, the pipes 1, 2, 3 and 4 are arranged concentrically by selecting the axial length, the spring 35 is pulled out through the center of the middle pipe, and the central pipe 10 is connected to the spring 35. The base 20 connected to the central pipe 10 is fixed to the uppermost pipe 1, and the caps 11, 13, 15 are fixed to the upper ends of the pipes 1, 2, 3, 4, and then the pipe group is fixed to the gear box. To do. When the lifting device is used, when the spring 35 is pushed up, the pipes 1, 2, 3, 4 are extended by moving upward from the pipe 1 to the pipe 4 sequentially. Even if the spring 35 is extended, the spring 35 is guided by the middle pipes 12, 14, and 16, so that the spring 35 does not meander to a problem.
[0011]
[2] The lifting device according to claim 2 is the lifting device according to claim 1, wherein the cap is composed of a portion contacting the sliding ring at the lower end of the pipe and a portion threadingly engaged with the threaded portion of the pipe. Since the opening for inserting the pipe is provided, the cap can be easily attached to and detached from the pipe, the pipes are prevented from coming off, and the pipe can be guided by the opening.
[0012]
[3] The lifting device according to claim 3 is the lifting device according to claim 2, wherein the cap is provided with a sealing portion on the surface facing the pipe so as to prevent intrusion of rainwater or the like transmitted on the pipe surface. Can do.
[4] The elevating device according to claim 4 is the elevating device according to claim 2 or 3, wherein the middle pipes are slidable to each other, between each pipe and each cap, between each pipe and each sliding ring, and each Since the middle pipes are slidably guided, the vertical movement between the pipes and between the middle pipes can be made extremely smooth.
[0013]
[5] The lifting device according to claim 5 is the lifting device according to any one of claims 2 to 4, wherein an opening is provided in the vicinity of the cap of the pipe to which the cap is fixed, and the spring is against the spring inside the cap. A slider with an opening that allows the pipe to open and close and that allows the opening of the pipe to be sealed or conducted by contact with the sliding ring is movably provided. Rainwater or the like that has entered the water can be discharged to the outside through both openings.
[0014]
[6] The lifting device according to claim 6 is the lifting device according to any one of claims 2 to 5, wherein the pipes have different axial lengths. Different groups of pipes can be used by mounting via a pedestal.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 is a cross-sectional view showing a pipe group of an elevating device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a gear box and a drum of the elevating device according to an embodiment of the present invention, and FIG. It is sectional drawing which shows the cap of an apparatus.
[0016]
In these figures, 1, 2, 3 and 4 are cylindrical pipes which are open at both ends, and the diameters are reduced in order, and are inserted so as to be slidable on the inner periphery of each outer pipe. Has been. FIG. 1 shows a state in which each of the pipes 1, 2, 3 and 4 has been fully extended, and the pipes 1, 2, 3 and 4 are not separated from the pipes located outside. It is composed.
[0017]
The means not to be separated includes, for example, means for detachably providing a cap at the upper end of each pipe and a sliding ring at the lower end, means for providing a folded portion and a detachable hook at the upper and lower ends of each pipe, and the like.
A sliding ring 5 having an opening at the center is fixed to the lower end of the uppermost pipe 1. The means for fixing is by screwing into a threaded portion on the outside of the pipe 1 or fastening of a screw bolt from the outside of the pipe 1. The pipes 2 and 3 are also detachably fixed with sliding rings 6 and 7 each having an opening at the center at the lower end thereof. A bottom ring 8 is fixed to a lower end of the lowermost pipe 4 and a holder 17 is detachably fixed thereto.
[0018]
The diameters of the openings of the sliding rings 5, 6, 7 and the bottom ring 8 are successively reduced. In FIG. 1, the shapes of the uppermost and lowermost sliding rings and the intermediate sliding rings are different, but they may be similar shapes.
Middle pipes 12, 14 and 16 are fixed in an upright state inside the openings of the sliding rings 6, 7 and 8, respectively. Each of these middle pipes is configured such that the middle pipe 16 is slidable into the middle pipe 14 and the middle pipe 14 is slidable into the middle pipe 12.
[0019]
Caps 11, 13 and 15 are detachably provided at the upper ends of the pipes 2, 3 and 4. A pedestal 20 is detachably provided at the upper end of the pipe 1. The fixing means for the caps 11, 13 and 15 and the pedestal 20 is constituted by detachable means such as screwing or screwing to the outer surface of the pipe. Each of the caps 11, 13, and 15 includes a screw portion that is screwed into each pipe and a retaining portion that prevents each sliding ring from coming off, and has an opening that is in sliding contact with the outside of the pipe that faces the center.
[0020]
The cap may be configured as shown in FIG. The cap of FIG. 3 has a U-shaped cross section, has a threaded portion so as to be screwed into the pipe 2, and has a sealing portion 46 such as a labyrinth groove or an O-ring at a portion corresponding to the pipe 1. Moreover, a water draining mechanism can also be provided as needed. This drainage mechanism includes an opening 44 provided in the vicinity of the lower end of the cap 11 of the pipe 2 and an opening communicating with the opening of the pipe 2 when a predetermined portion protrudes from the cap 11 by the spring 41 and is pressed upward by the sliding ring 6. And a slider 43 provided with 45. In FIG. 3, reference numeral 42 denotes a screw thread.
[0021]
As shown in FIG. 2, a central pipe 10 connected to a pedestal 20 for fixing a spring 35 made of a special winding spring as a flexible rack inside the uppermost pipe 1, on the inner side of the central pipe 10. A screw 21 to be screwed, a ball portion 22 connected to the screw 21, and a detachable connecting means such as a receiving metal fitting 23 which can turn the ball portion 22 and receive the ball portion 22 in a retaining state are provided.
[0022]
The vertical movement device that moves the telescope-type pipe group up and down includes a spring 35 made of a special winding spring and a rack gear 31 connected to a motor through a belt, a V pulley 33 and a worm gear 32. The rack gear 31 meshes with the spring 35. The gear box 30 stores the gears in a predetermined arrangement, and places and fixes the holder 17 on the drum 34. A spring 35 is accommodated in the drum 34 in a spiral shape.
[0023]
When the motor is started, the rack gear 31 is rotated forward and backward through the belt, the V pulley 33, and the worm gear 32, and the spring 35 engaged with the rack gear 31 is linearly moved up and down. Move the pipe up and down sequentially. The pipe 1, the pipe 2, the pipe 3 and the pipe 4 can be moved up and down in the forward and reverse directions sequentially by the contact and separation of each cap and the corresponding sliding ring.
[0024]
Each pipe is guided by sliding between the middle pipes or, if necessary, between the middle pipe 12 and the inner peripheral surface of the pipe 1, sliding contact between each pipe and each sliding contact Lind, and sliding contact between each cap and each pipe. Do.
A device such as a lighting device for working at a high place is appropriately provided on the pedestal 20 which is the uppermost stage when the vertical movement device is fully extended.
[0025]
Each pipe is provided with a plurality of pipes having different length directions as required.
In addition, this invention is not limited to the said Example, A various deformation | transformation is possible based on the meaning of this invention, and they are not excluded from the scope of the present invention.
[0026]
【The invention's effect】
As described above in detail, according to the present invention, the following effects can be obtained.
[1] In the first aspect of the present invention, the pipes are configured not to be separated from each other by a detachable cap, and an inner pipe through which a flexible rack can be inserted is fixed inside each pipe, and the diameter of the inner pipe is maximized. Each of the middle pipes can be inserted into the middle pipe of the upper pipe so that the pipes of the upper pipe are sequentially reduced. Since the cap is detachable from the pipe, it is easy to assemble and various types of pipes can be used.
[0027]
When assembling the lifting device, each pipe is arranged concentrically with the axial length selected, the spring is pulled out through the center of the middle pipe, the center pipe is connected to the spring, and the pedestal connected to the center pipe is After fixing to the upper pipe and fixing each cap to the upper end of each pipe, the pipe group is fixed to the gear box. When using the lifting device, when the spring is pushed up, the pipes are moved upward from the uppermost pipe to the lowermost pipe in order, and each pipe is extended. In this case, even if the spring is fully extended, it is guided by the middle pipe, so the spring does not bend so much as to be a problem. Therefore, even if the length of the pipe group is long, the meandering of the spring can be prevented.
[0028]
[2] In the invention according to claim 2, in the invention according to claim 1, the cap is composed of a portion that comes into contact with the sliding ring at the lower end of the pipe and a portion that engages with the threaded portion of the pipe, and the pipe is inserted in the center. Therefore, the cap can be easily attached to and detached from the pipe, the pipes are prevented from coming off, and the pipe can be guided by the opening.
[0029]
[3] In the invention of claim 3, in the invention of claim 2, the cap is provided with a sealing portion on the facing surface that is in sliding contact with the pipe, so that it is possible to prevent intrusion of rainwater or the like that travels on the pipe surface. it can.
[4] The invention according to claim 4 is the invention according to claim 2 or 3, wherein the middle pipes are slidable to each other, between each pipe and each cap, between each pipe and each sliding ring, and each middle pipe. Since the gaps are slid and guided, the vertical movement between the pipes and between the middle pipes can be made extremely smooth.
[0030]
[5] In the invention according to claim 5, in the invention according to any one of claims 2 to 4, an opening is provided in the vicinity of the cap of the pipe to which the cap is fixed, and the cap can be moved up and down against the spring. And a slider provided with an opening that allows the opening of the pipe to be sealed or conducted by contact with the sliding ring is movably provided. Rainwater or the like that has entered the gap can be discharged to the outside through both openings.
[0031]
[6] The invention according to claim 6 is the invention according to any one of claims 2 to 5, wherein the axial lengths of the pipes are made different from each other. Different groups of pipes can be used by mounting via the pedestal.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a pipe group of a lifting apparatus according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a gear box and a drum of the lifting device according to the embodiment of the present invention.
FIG. 3 is a sectional view showing a cap of the lifting device according to the embodiment of the present invention.
FIG. 4 is a cross-sectional view showing a conventional lifting device.
[Explanation of symbols]
1, 2, 3, 4 Cylindrical pipes 5, 6, 7 Sliding ring 8 Bottom ring 10 Center pipe 11, 13, 15 Cap 12, 14, 16 Middle pipe 17 Holder 20 Base 21 Screw 22 Ball part 23 Bracket 30 gear box 31 rack gear 32 worm gear 33 V pulley 34 drum 35 flexible rack (special spring)
41 Spring 42 Thread 43 Slider 44, 45 Opening 46 Sealing part

Claims (6)

Inside the pipe through which the flexible rack can be inserted, a plurality of smaller diameter pipes are slidably inserted so that the inner pipe can protrude from the upper end of each pipe . A sliding ring located between the outer pipe and the outer pipe is attached to the lower end of the pipe, and the upper end of the outer pipe is interposed between the inner pipe and abuts against the sliding ring. A cap that prevents the pipes from being separated from each other is attached, the flexible rack is inserted through the pipes, and is connected to a vertical movement device that allows the flexible rack to be extended in a longitudinal direction. An elevating device configured so that each adjacent inner pipe protrudes from the upper end of each pipe,
A drainage mechanism is provided between the adjacent pipes, and the drainage mechanism is
A first opening through the wall of the outer pipe;
A slider having a second opening that is provided in the cap so as to freely move in and out, and is pressed by the sliding ring and displaced in the sinking direction, the second opening being electrically connected to the first opening;
The elevating apparatus characterized in that water that has entered the gap between the adjacent pipes is discharged out of the outer pipe through the first and second openings that are conducted . 2. The lifting device according to claim 1 , wherein the cap is detachably attached and includes a portion that comes into contact with the sliding ring and a portion that engages with a screw portion of the outer pipe, and is used for inserting a pipe in the center. A lifting device characterized in that an opening is provided. The lifting device according to claim 1 or 2 , wherein a middle pipe through which a flexible rack can be inserted is fixed inside each pipe, and the diameter of the middle pipe is made smaller from that of the uppermost pipe. Te, lifting devices each middle pipe is freely inserted into a pipe in a pipe made of a respective upper, characterized Rukoto through interpolation in the pipe in the previous SL each pipe the flexible rack. 4. The lifting device according to claim 3 , wherein the middle pipes are slidable with respect to each other, and slide between the pipes and the caps, between the pipes and the sliding rings, and between the middle pipes. A lifting device characterized by having a guide structure. The lifting apparatus according to any one of claims 1 to 4 , wherein the cap is provided with a sealing portion on an opposing surface that is in sliding contact with the inner pipe. The lifting apparatus according to any one of claims 1 to 5 , wherein the pipes have different axial lengths.

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