JP2000016767A - Electric lifting device - Google Patents

Abstract

(57) Abstract: An object of the present invention is to provide an electric lifting device capable of improving the versatility of a terminal block installation plate and reducing costs. A lifting / lowering operation terminal block (22) installed in a main body (1) at a high position on the ceiling side for supplying power to a driving mechanism (7) in the main body, and a winding and rewinding of a wire rope (6) by the driving mechanism. There is provided one or more fixture operation terminal blocks 23 that are used by the number corresponding to the number of lamps of the lighting fixture to be raised and lowered and supply power to the lighting fixture. A plurality of the same terminal block installation plates 21 are fixed in the main body 21. These plates 21
Are formed from a flat terminal block support plate portion 31 to which one or two terminal blocks can be attached, and a fixing portion 32 bent from the plate portion and fixed to the main body portion 1. One terminal block 22 for lifting operation is mounted on one terminal block installation plate 21.
At the same time, one or two appliance operation terminal blocks 23 are mounted on another terminal block plate 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric hoisting apparatus for raising and lowering a lighting fixture installed on a ceiling side of a gymnasium or the like for maintenance, and more particularly to a drive mechanism and a lighting fixture for raising and lowering the lighting fixture. The present invention relates to a motor-driven elevating device having an improved mounting structure of a terminal block that is individually prepared for supplying power.

[0002]

2. Description of the Related Art A main body installed at a high position on the ceiling side of an electric lifting device for raising and lowering a lighting fixture such as a mercury lamp has a terminal block for lifting operation and one or more terminal blocks for operating equipment. . FIG. 9 is a perspective view showing a main body 51 of a conventional electric lifting apparatus with one end plate 52 opened, in which 53 is a terminal block for lifting operation and 54 is a terminal block for instrument operation. These are fixed to the single terminal block installation plate 55 shown in FIG. 10 by screws 56 or 57, respectively.

That is, the plate 55 is formed by bending a sheet metal, and has a central bent portion 55 having a U-shape in plan view.
a, and has fixing portions 55d that are bent from the lower edges of the projecting portions 55b and screwed to the main body portion 51 on both sides of the projecting portion 55a. I have. Then, a pair of projections (not shown) projecting from the back surface of the terminal block 53 are fitted into a pair of positioning holes 59 provided in one of the overhang portions 55b, respectively, and a screw through hole opened between the positioning holes 59 is provided. The terminal block 53 is fixed by screwing a screw 56 into the terminal block 53 from the back side of the overhanging portion 55b through 60. Similarly, the terminal block 54 is inserted into a pair of positioning holes 61 provided in the other overhang portion 55c.
A pair of projections (not shown) projecting from the rear surface of the terminal block 5 are respectively fitted into the terminal block 5 from the rear side of the overhang portion 55c through the screw through holes 62 formed between the positioning holes 61.
The terminal block 54 is fixed by screwing a screw 57 into the terminal 4.

The lifting / lowering terminal block 53 is used to supply power to a driving mechanism for winding and rewinding a wire rope (not shown) built in the main body 51. The terminal block 53 has a floor-side operation. The power line 63 connected to the panel is the end plate 5
It is inserted and connected through two power line through holes 64. The terminal block 53 is a three-pole type for rotating the electric motor of the drive mechanism forward and reverse.
By supplying power to the motor through the motor, the lifting unit suspended from the main body 51 via the rope can be moved up and down.

[0005] The equipment operation terminal block 54 includes
The terminal block 54 is connected to a power line 65 connected to a floor-side operation panel and is connected to a power line of the end plate 52. The connection is made through a through hole 66. As the terminal block 54, a two-pole type is used. By supplying and stopping the power to the lighting fixture through the terminal block 54, the lighting fixture can be turned on and off. In FIG. 9, reference numeral 67 denotes a hermetically sealed rubber bush attached to the spare power line through hole. The power line through holes 64 and 66 are opened by removing the center portion of the rubber bush. The rubber bush whose central portion is opened is denoted by reference numeral 67 in FIG.
This is indicated by a.

[0006]

As described above, installing the terminal blocks 53 and 54 in the main body 51 using the terminal block installation plate 55 formed by bending a single sheet metal requires all the terminals. Since the stands 53 and 54 are arranged on one side of the main body 51, it is convenient for centralized electric wiring.

By the way, the same number of lighting operation terminal blocks 54 as the number of lighting fixtures are used. That is, the ballast for each lamp is not built in the main body 51, but is provided on the operation panel on the floor side, and the appliance operation terminal block 54 is connected to the secondary side of these ballasts. As described above, it is necessary to install the same number of terminal blocks 54 as the lamps. Therefore,
In an electric lifting device that lifts and lowers a lighting device having a large number of lamps, the device operation terminal block 54 is often used.

Under such circumstances, conventionally, as described above, the terminal block installation plate 55 made of a single plate is provided with an overhang portion 55c of a size corresponding to the number of terminal blocks 54 used.
Were designed, manufactured and used in each case according to the lighting equipment to be used.

Therefore, one terminal block installation plate 55
Can not be used in common for various electric lifting devices,
Because of lack of versatility, cost reduction due to mass production effects could not be expected. In addition, a mold for bending the plate 55 as a single-function part and making a necessary hole is inevitably large, and the mold is different for each model of the electric lifting / lowering device. This is an obstacle to reducing the cost of the electric lifting device.

[0010] Therefore, an object of the present invention is to provide an electric lifting device capable of improving the versatility of the terminal block installation plate and reducing the cost.

[0011]

SUMMARY OF THE INVENTION According to the present invention, there is provided a driving unit for winding and rewinding a wire rope, a main body disposed at a high position on a ceiling side, and a lighting device supported by the wire rope. A lifting unit that is raised and lowered with respect to the main body,
A lifting / lowering operation terminal block installed in the main body to supply power to the drive mechanism; and a power supply for the lighting fixture installed in the main body and used by a number corresponding to the number of lights of the lighting fixture. It is premised on an electric lifting / lowering device provided with one or more appliance operation terminal blocks to be supplied.

In order to solve the first problem, a first aspect of the present invention is to fix a plurality of the same terminal block installation plates in the main body, and to attach these plates to each of the two terminal blocks. One or two terminal block support plate portions that can be attached, and a fixing portion that is bent from this plate portion and fixed to the main body portion, and the terminal block for lifting operation is formed on one terminal block installation plate. The terminal block for instrument operation is attached to another terminal block installation plate while being attached.

According to the first aspect of the present invention, a plurality of the same terminal block installation plates to which the terminal block for lifting operation and the terminal block for instrument operation can be mounted are used, and the necessary terminal blocks are mounted on each plate. Therefore, when the number of lights of the lighting fixture is large, it can be adapted by increasing the number of terminal block installation plates to be used. Therefore, regardless of the number of terminal blocks used, the same terminal block installation plate can be used in common, a mold for making this plate can be shared, and the terminal block installation plate can be downsized.

In carrying out the invention of claim 1,
As in the invention of claim 2, a first positioning hole in which a pair of first projections provided on the back surface of the lifting / lowering operation terminal block are fitted to the terminal block support plate, and the lifting / lowering operation terminal. A first screw through hole through which a first mounting screw to be screwed into the base is provided in a line, and a pair of second protrusions to which a pair of second convex portions of the back surface of the appliance operation terminal block are fitted. It is preferable that a positioning hole and two second screw through holes through which second mounting screws screwed into the appliance operation terminal block pass are provided in a line.

According to the second aspect of the present invention, in order to mount the lifting / lowering operation terminal block on the terminal block installation plate, it is necessary to use the first one.
After selecting the positioning holes and fitting the pair of first convex portions of the terminal block for lifting operation to the first positioning holes,
The first mounting screw may be passed through the first screw hole from the back side of the plate, and the terminal block for lifting operation may be fixed by tightening the first mounting screw. Similarly, in order to mount the appliance operation terminal block on the plate, the second positioning holes are selected, and a pair of second convex portions of the appliance operation terminal block are fitted into the second positioning holes. After that, the second mounting screw may be passed through the second screw through hole from the back side of the plate, and the device operation terminal block may be fixed by tightening the second mounting screw. In this case, since there are two pairs of second positioning holes, when the number of lamps of the lighting fixture is one, it is sufficient to select one set of second positioning holes and perform the screwing. When the number of lamps is two, the screwing may be performed using two sets of second positioning holes. As described above, one terminal block for elevating operation or one or two terminal blocks for operating equipment can be selectively screwed to the terminal block installation plate.
In installing the various types of terminal blocks in the main body, the installation plate can be used as a common component for these terminal blocks.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

The electric lifting device shown in FIGS. 1 to 4 has a main body 1 disposed at a high position on the ceiling side of a room such as a gymnasium, and a locking means for the main body 1 below the main body 1. And a raising / lowering unit 2 that moves up and down over an ascending position mechanically supported through the floor and a descending position on the floor side.
As shown in FIG. 1, a mercury lamp lighting fixture 3 is attached to the lower side of the elevating unit 2, which is moved up and down together with the elevating unit 2. Depending on the use of the electric lifting device, the lighting fixture 3 having a necessary number of lamps, that is, a single or multiple lighting fixture 3 is used.

As shown in FIG. 1 and FIG.
Is formed by incorporating a drive mechanism 7 for winding and rewinding a wire rope 6 in a housing 5 having a handle 4 for attachment to a ceiling bent in a U-shape. The housing 5 includes a sheet metal base 5a, a sheet metal cover 5b connected to the base 5a, and a pair of rectangular cylinders formed by the base 5a and the cover 5b, each of which has an opening at both ends individually closed and attached. It is formed from end plates 5c and 5d. A hole 8 is formed in the bottom wall of the cover 5b.
d is made of a synthetic resin.

As shown in FIG. 3, the drive mechanism 7 includes an electric motor 7a, which is an induction motor fixed to a base 5a and capable of rotating forward and backward, and a gear reducer 7b connected to the motor shaft of the motor 7a. And a winding drum 7c mounted on the output shaft of the speed reducer 7b.

One end of a wire rope 6 wound on the winding drum 7c is connected to the winding drum 7c. The other end of the wire rope 6 is fixed to a wire fixing portion (not shown) in the main body 1. The intermediate part of the wire rope 6 is drawn out through the hole 8 below the main body part 1 and passes through a pair of guide rollers (not shown) in the elevating part 2, whereby the wire rope 6 suspends the elevating part 2. I have

Reference numeral 9 shown in FIG. 3 and the like denotes a lock shaft provided in the lock means, 10 denotes a synthetic resin introduction guide which guides the ascending / descending portion 2 to the lock shaft 9 while positioning the elevating portion 2.
Reference numeral 11 denotes a contact block which is urged downward by a back pressure spring 12. The contact base 1 forming the upper surface of the elevating unit 2 is mounted on the base 11.
3 is pressed from below at the raised position,
Electrical contact between the three is ensured. or,
Reference numeral 14 in FIG. 1 denotes a main body side guide roller for routing the wire rope 6.

As shown in FIG. 4, a plurality of, for example, two sheet metal terminal block installation plates 21 are provided in the main body 1.
One of the removable end plates 5c and 5d, for example, the end plate 5
It is fixed to face c. These plates 21 are the same ones manufactured using the same mold, and one of them is provided with only one terminal block 22 for elevating operation, and the other is provided with one or two terminal blocks 23 for operating equipment. Mounted.
In the present embodiment, the number of lamps of the lighting fixture 3 is one, and the other plate 21 has a fixture operation terminal block 23.
1 is attached.

The lifting / lowering operation terminal block 22 is a three-pole type terminal block for supplying power to the electric motor 7a of the drive mechanism 7. As shown in FIGS. 5 and 6, the terminal block 22 has a plurality of wire insertion ports 22a on the front and a pair of first projections 24 on the back.
And a first screw hole 25. The first screw hole 25 is provided exactly in the middle between the pair of first protrusions 24, and these are arranged in a line.

The appliance operation terminal block 23 is provided with the contact block 11,
Reference numeral 13 denotes a bipolar terminal block that supplies power to the lighting fixture 3 via the lifting unit 2 in a connected state. This terminal block 23
5 and FIG.
a and a pair of second convex portions 26 and second screw holes 27 on the back surface. The second screw hole 27 is provided exactly in the middle between the pair of second convex portions 26, and these are arranged in a line.

Next, a description will be given of the terminal block installation plates 21 and the attachment of the terminal blocks 22 and 23 thereto. As shown in FIG. 6, the plate 21 has a flat terminal block support plate portion 31 and a fixed portion 3 bent at a right angle from one side thereof.
By fixing the fixing portion 32 to the base 5a with a screw 33 as a connecting means, the terminal block supporting plate portion 31 is vertically arranged as shown in FIG.
a.

The terminal block supporting plate 31 occupying most of the plate 21 is large enough to mount one terminal block 22 and two terminal blocks 23. A pair of first positioning holes 36 and first screw through holes 37 are formed in the support plate 31 so as to be diagonally arranged in a line. The first protrusion 24 is fitted into the first positioning hole 36, and the first mounting screw 38 is inserted into the first screw through hole 37. Further, the terminal block support plate 31 has two sets of second
Positioning hole 39, two second screw through holes 40 and one third
A screw hole 41 is opened. The second positioning hole 39 and each of the screw holes 40 and 41 are connected to a third screw hole 41.
Are alternately arranged in the middle and arranged in a line in the vertical direction. In this arrangement, the distance between adjacent holes is equal. The second convex portion 2 is provided in the second positioning hole 39.
6 is fitted, and the second and third screw through holes 40 and 41
The mounting screw 42 is inserted.

Two terminal block installation plates 21 arranged side by side
In order to mount the lifting / lowering operation terminal block 22 to one of the plates 21, a pair of first projections 24 projecting from the back surface of the terminal block 22 are fitted into a pair of first positioning holes 36, respectively. After that, the first mounting screw 38 is passed through the first screw hole 37 from the rear side of the terminal block support plate portion 31 and screwed into the first screw hole 25 of the terminal block 22, and the screw 38 is tightened. Can be attached to the front of the terminal block support plate 31 as shown in FIG. At this time, the first positioning hole 36 is
To stop.

Similarly, in order to mount the appliance operation terminal block 23 on the other terminal block installation plate 21, for example, a pair of second convex portions 26 protruding from the back surface of the terminal block 23 are connected to the third screw holes. A pair of second positioning holes 39 located on both sides of 41
After each fitting, the second mounting screw 42 is passed through the third screw through hole 41 and screwed into the second screw hole 27 of the terminal block 23,
By tightening the screw 42, it can be attached to the front of the terminal block support plate 31 as shown in FIG. At this time, the second positioning holes 39 prevent the terminal block 23 from rotating. Instead of the above procedure, a pair of hole groups including the second screw hole 40 and a pair of second positioning holes 39 located on both sides thereof is selected, and the second positioning hole 39 is provided with a second convex portion. 26
After fitting each, the second mounting screw 42 is passed through the second screw through hole 40 and screwed into the second screw hole 27 of the terminal block 23, and the screw 42 is tightened to mount the terminal 23. You may. When two terminal blocks 23 are to be mounted, one terminal block 23 is attached to one set of holes in the above procedure, and another terminal block 23 is mounted to another set of holes in the same procedure. Attach it with

As described above, the electric lifting device uses a plurality of terminal block mounting plates 21 of the same structure and shape to which the lifting and lowering operation terminal block 22 and the tool operation terminal block 23 can be attached, and the terminals required for each of them are used. Since the terminal block mounting structure for mounting the table is provided, when the number of lights of the lighting fixture 3 is large, it can be adapted by increasing the number of terminal block installation plates 21 to be used.

By employing the terminal block mounting structure described above, the terminal block mounting plate 21 can be manufactured with the same mold while reducing the size. Since the terminal block installation plate 21 is small in this way, the cost of the mold can be reduced as the mold can be made smaller. In addition, different types of terminal blocks 22, 2
In the manufacture of the terminal block installation plate 21 to which the individual 3 is attached, a mold can be used in common, and a large number of installation plates 21 are produced along with this, so that a mass production effect can be obtained.

Since one of the two types of terminal blocks 22 and 23 can be screwed to each of the two terminal block installation plates 21 as described above, the versatility is excellent, and therefore the terminals are excellent. It is possible to reduce the cost of the table mounting plate 21 and the overall cost of the electric lifting device. In particular, since the installation plate 21 can be obtained at a low cost due to the mass production effect, a greater cost reduction is possible when applied to an electric traveling elevating device having a small number of production units.

In addition, since the installation plate 21 has a simple L-shape as shown in FIG. 6, bending by a metal mold can be performed very easily. Can contribute.

Further, as described above, the terminal block installation plate 2
Since the size of the lighting device 3 is reduced, the degree of freedom in the arrangement of the lighting device 3 in the body 1 can be improved. , 5d. Thereby, many terminal blocks can be installed without increasing the size of the main body 1. By the way, when mounting all terminal blocks on a single board as in the past, the terminal block installation plate becomes larger as the number of terminals increases, so the main body must be enlarged accordingly, These points can be improved.

As shown in FIGS. 1 and 8, a three-wire power supply line 43 is connected to the lifting / lowering operation terminal block 22 disposed in the main body 1 in the procedure described above. Stand 23
Is connected to a two-wire power supply line 44. As shown in FIG. 7, a plurality of cut-off portions 45 are provided on the upper edge 5c1 of the end plate 5c that covers both terminal blocks 22 and 23 to facilitate this connection. These scheduled portions 45 are composed of portions surrounded by perforations 46 formed in the upper edge portion 5c1 and end faces of the upper edge portion 5c1, and can be easily separated along the perforations 46. 47
Is formed. It should be noted that a thin portion may be used instead of the perforation 46 as the separating means.

Next, a procedure for connecting the power supply lines 43 and 44 to the terminal blocks 22 and 23 at a high position on the ceiling side will be described with reference to FIG. In FIG. 8, reference numeral 48 denotes a suspension bolt provided in advance on a ceiling portion. The handle bolt 4 of the electric lifting device assembled in advance on the floor side is fitted to the suspension bolt, and a nut (not shown) is screwed thereto. Then, the electric lifting device is fixed to the ceiling high place. FIG. 8A shows a state immediately before the fixing operation starts.

After this fixing, as shown in FIG. 8 (B), the end plate mounting screws 49 are removed, and the end plate 5c is removed, so that the terminal blocks 22 and 23 are exposed. In this state, the power supply line 43 is inserted and connected to the electric wire insertion hole 22a of the terminal block 22, and the electric wire insertion hole 23a of the terminal block 23 is connected.
The power supply line 44 is plugged in.

Next, the perforated lines 46 of the upper edge portion 5c1 of the removed end plate 5c are broken, and the portions 45 to be cut off are respectively cut off to form two through-grooves 47 as shown in FIG. 8C. I do. Thereafter, the end plate 5c is connected to the base 5a and the cover 5 while the power supply lines 43 and 44 are individually introduced into the respective communication grooves 47.
b in combination with the base 49 using the screw 49.
Connect to a. According to such a procedure, the power supply lines 43, 4 connected to the terminal blocks 22, 23 as shown in FIG.
4 can be pulled out to the upper side of the housing 5 through the passage groove 47.

As described above, it is possible to easily obtain the communication groove 47 by separating the planned separation portion 45 in accordance with the required number of power lines at the construction site.
When the end plate 5c is attached to the housing 5,
4 can be passed. Therefore, it is not necessary to form a through hole in the end plate 5c in advance, and it is not necessary to mount a rubber bush or the like on the end plate 5c to cover the hole. Stand 2
The connection work of the power supply lines 43 and 44 to the power supply lines 2 and 23 can be easily performed.

[0039]

The present invention is embodied in the form described above and has the following effects.

According to the first and second aspects of the present invention, one terminal block for lifting operation or one or two terminal blocks for operating equipment are selectively mounted. Since the same terminal block installation plate is used, a plurality of the terminal block installation plates can be manufactured with the same mold while reducing the size of the terminal block installation plate. Accordingly, the cost of the mold can be reduced, and not only the common use of the mold can be achieved, but also a mass production effect can be obtained, so that the cost of the plate itself and the cost of the entire electric lifting device can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of an electric lifting device according to a first embodiment of the present invention in a state in which a lighting fixture is supported.

FIG. 2 is a perspective view showing a configuration of an electric lifting device according to the first embodiment.

FIG. 3 is a perspective view showing a configuration of the electric lifting device according to the first embodiment, with a cover of a main body part thereof being removed.

FIG. 4 is a perspective view showing the configuration of the electric lifting / lowering device according to the first embodiment when viewed from a direction different from FIG. 3;

FIG. 5A is a rear view showing a configuration of a lifting operation terminal block provided in the electric lifting device according to the first embodiment. (B)
FIG. 2 is a rear view showing a configuration of an appliance operation terminal block provided in the electric lifting device according to the first embodiment.

FIG. 6 is an exploded perspective view showing a relation between a terminal block installation plate and a terminal block attached to the terminal block installation plate of the electric lifting device according to the first embodiment.

FIG. 7 is a perspective view showing a configuration of an end plate included in a main body of the electric lifting device according to the first embodiment.

FIGS. 8A to 8D are perspective views sequentially showing a procedure for connecting a power supply line to each terminal block of the electric lifting / lowering apparatus according to the first embodiment.

FIG. 9 is a perspective view showing a partially exploded configuration of a conventional electric lifting device.

FIG. 10 is an exploded perspective view showing a relation between a terminal block installation plate and a terminal block attached to the terminal block installation plate of the electric lifting device according to the conventional example.

[Description of Signs] 1 ... body part, 2 ... elevating part, 3 ... lighting equipment, 6 ... wire rope, 7 ... drive mechanism, 7a ... electric motor, 21 ... terminal block installation plate, 22 ... lifting / lowering operation terminal block, 23: terminal block for appliance operation, 24: first convex portion, 25: first screw hole, 26: first convex portion, 27: second screw hole, 31: terminal block support plate portion, 32: fixing portion, 36 ... 1st positioning hole, 37 ... 1st screw through hole, 38 ... 1st mounting screw, 39 ... 2nd positioning hole, 40 ... 2nd screw through hole, 42 ... 2nd mounting screw.

Claims (2)

[Claims] 1. A main body portion having a built-in drive mechanism for winding and rewinding a wire rope and disposed at a high position on a ceiling side, and supporting a lighting fixture and moving up and down with respect to the main body portion via the wire rope. Lifting unit, a lifting / lowering operation terminal block installed in the main body to supply power to the drive mechanism, and installed in the main body and used by a number corresponding to the number of lights of the lighting fixture. 1 for supplying power to the lighting equipment
In the electric lifting / lowering apparatus provided with the above-mentioned appliance operation terminal block, a plurality of the same terminal block installation plates are fixed in the main body, and one or two of each of these plates can be attached to these plates. A terminal block supporting plate portion and a fixing portion bent from the plate portion and fixed to the main body portion. The terminal block for lifting operation is mounted on one terminal block installation plate, and the other terminal block is mounted. An electric hoisting and lowering device, wherein the device operation terminal block is attached to an installation plate. 2. A first fitting in which a pair of first projections which the terminal block for lifting operation has on its back surface is fitted into the terminal block supporting plate portion.
A positioning hole and a first screw through hole through which a first mounting screw to be screwed into the lifting / lowering operation terminal block is provided are arranged in a line, and a pair of second convex portions provided on the back surface of the appliance operation terminal block. The two sets of second positioning holes into which the fittings are fitted and the two second screw holes through which the second mounting screws screwed into the instrument operation terminal block are provided in a line. The electric lifting device according to the above.