JPH0344773Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention is mainly used for wiring work of electric wires.
A relatively heavy drum wrapped with electric wire,
This invention relates to a drum elevating device that is used to lift the drum to a required height above the ground and support it rotatably in order to rotate it and pay out the electric wire.

[Conventional technology]

A conventional drum lifting device used for this type of application has a support part that rotatably supports the core shaft of the drum at the upper end, and a lifting shaft with thread grooves carved on the outer circumferential surface that can be moved up and down using a support pipe. Generally used are the ratchet type, which has a ratchet wheel with a threaded groove formed on its inner circumferential surface that is inserted into the lift shaft, and the jack type, which uses screws, gears, hydraulic pressure, etc. ing.

[Problem that the invention attempts to solve]

However, the ratchet type mentioned above,
Not only does the operating lever normally have to be operated four times to rotate the ratchet wheel once, but the vertical movement of the lifting shaft per revolution of the ratchet wheel is approximately 4 mm, which requires extremely complicated operations. is also inefficient. In particular, this type of lifting device has a drawback that it takes a considerable amount of time to raise and lower the drum because it is equipped with a pair of elevators to support the core shafts that respectively protrude from both ends of the drum.

On the other hand, in the case of a jack-type device, the support base becomes larger, making the entire device larger and heavier. Moreover, it has the disadvantage that it requires considerable force to operate.

This idea was made in view of these problems, and although it has a small and lightweight structure, it does not require any complicated operations or large operating force, and can be moved up and down extremely quickly. The technical problem is to provide a lifting device.

[Means for solving problems]

This idea consists of a pair of elevators, an elevator shaft that has a supporting part for the core shaft of the drum at the upper end and is inserted into a support pipe so that it can move up and down, and a worm gear etc. that is installed to move this elevator shaft up and down. A boost reduction mechanism,
A first cap gear fixed to the drive shaft of this booster reduction mechanism and a second cap gear meshing with the first cap gear are fixed and attached to the chuck part of an electric drill at the tip exposed to the outside. an actuating shaft formed with a first rotational passive part that fits into the coupling tool and rotates together; a third shaft gear that meshes with the second shaft gear; and a second shaft that fits into the coupling tool. The gist is a configuration including a rotating body integrally provided with a rotating passive part.

[Effect]

Since the drum elevating device of this invention is constructed as described above, the connecting tool is fixed to the chuck part of the electric drill, and after the connecting tool is fitted to the first rotating passive part, the electric drill is rotated. When driven, the rotation of the electric drill causes the coupling, the operating shaft, and the second
The power is transmitted to the boost reduction mechanism via the head gear, the first head gear, and the drive shaft, and the lifting shaft is moved upward, for example, by the operation of the boost reduction mechanism.

On the other hand, when the electric drill is driven by fitting the coupler into the second rotation driven part, the rotation of the electric drill causes the coupler, the rotating body, the second head gear, the first head gear, and the drive shaft to rotate. The signal is transmitted to the boost reduction mechanism via the power source. In this case, the third head gear of the rotating body is interposed in the transmission path, so that the rotation direction of the drive shaft and the boost reduction mechanism is reversed from the above case, and the elevating shaft is moved downward.

In this way, by using an electric drill as the drive source, there is no need for complicated operations or large operating forces, and the configuration is much simpler, smaller and lighter.Moreover, since it is powered by an electric drill, Elevating and lowering operations can be performed quickly.

〔Example〕

Hereinafter, preferred embodiments of this invention will be described with reference to the drawings.

Figures 1 to 4 show one embodiment of this invention, with Figure 1 being a cutaway front view of the main parts, Figure 2 being a cutaway left side view, Figure 3 being a cutaway plan view, and Figure 4 being the overall view. FIG. 3 is a front view showing the configuration. In addition, in FIGS. 1 to 3, in order to make the structure easier to understand, the directions of some members are shown changed to make the structure clearer. First, the overall configuration will be explained with reference to Figure 4.
This elevating device consists of a pair of elevators 1, 1 having the same configuration, and a core shaft 4 protruding from both ends of a drum 3 between supporting parts 2, 2 at the upper ends of both elevators 1, 1.
The drum 3 is rotated by placing the drum 3 across the drum 3 and moving the lifting shafts 5, 5, each of which has the support part 2 at its upper end, upwardly relative to the intermediate support pipes 6, 6 into which it is vertically movably inserted. It is designed to be pushed above the surface of the earth so that it can be Moreover, the intermediate support pipes 6, 6 are inserted into the base support pipes 7, 7 so as to be vertically movable. A plurality of adjustment holes are drilled through each of the support pipes 6 and 7 in the horizontal direction at predetermined intervals. While matching, a fixing pin 8 is inserted to fix both support pipes 6 and 7 to each other.

Next, the elevating mechanism section, which is the main part of this invention, provided between the elevating shaft 5 and the intermediate support pipe 6 is installed in the first place.
This will be explained with reference to FIGS. As shown in FIG. 2, a gear case 9 is attached to the upper end of the intermediate support pipe 6.
is fixed by a screw 10, and a worm wheel 11 is rotatably supported within this gear case 9 by a thrust bearing 12. As is clear from Figure 3, the worm wheel 1
1 has a ring shape as a whole, and a threaded groove is formed on the inner circumferential surface of the ring. The aforementioned lifting shaft 5
is a screw shaft with a thread groove carved on its outer circumferential surface, and is inserted into the worm wheel 11 in a state where it is screwed into the thread groove of the worm wheel 11.
Further, the elevating shaft 5 slides on a key 12 provided on the gear case 9 to move up and down, and is prevented from rotating by the key 12. Therefore, the elevating shaft 5 is moved up and down by the forward and reverse rotation of the worm wheel 11. The above-mentioned support section 2 equipped with a pair of rollers 13, 13 that rotatably supports the core shaft 4 is fixed to the upper end of the lifting shaft 5, and the rollers 13, 13 are connected to the first
As shown in the figure, both ends of the roller shaft 14 are rotatably supported by bearings 15, 15, respectively, and are prevented from coming off from the bearings 15, 15 by a retaining ring 16. Further, a stopper 17 is provided at the lower end of the lifting shaft 5 to restrict the upward movement position thereof.

Inside the gear case 9, a worm 18 that meshes with the worm wheel 11 is provided, and the worm gear made up of the worm wheel 11 and the worm 18 constitutes a boost reduction mechanism. As shown in FIG. 3, the worm 18 is rotatably supported at both ends of a drive shaft 19 consisting of a worm shaft by bearings 20, 20, and is also supported by a metal cover 21 and a retaining ring 2.
2, it is stably maintained. A first head gear 23 is fixed to the worm 18, that is, the drive shaft 19 of the booster reduction mechanism.

Next, the operating mechanism of the boost reduction mechanism will be explained. The operating shaft 26 is rotatably supported by a bearing 25 of a bearing case 24 fixed to the gear case 9, and the first shaft gear meshed with the first shade gear 23. The second head gear 27 is fixed at one end, and the driven side of a slip plate 28 as a stabilizing device is fixed at the other end, and the driving side of the slip plate 28 has a first rotational passive part made of a hexagonal nut at the tip. 29, and the rotation shaft 30 of the first rotation passive part 29
is connected to the operating shaft 26. As shown in FIG. 2, the operating shaft 26 is provided in a predetermined inclined state and protrudes upward so that it can be easily operated using an electric drill, which will be described later.
In FIGS. 1 and 3, the orientation has been slightly changed to clearly show the structure. In addition, drive shaft 1
At the tip of the oil-less metal 34 is a rotating body 33 in which a third cap gear 31 that meshes with the second cap gear 27 and a second rotary passive part 32 having a hexagonal nut shape are integrally formed. It is rotatably attached with the intervening. This rotating body 33 and the first cap gear 23
A spacer cylinder 35 is interposed between the
The rotating body 33 is positioned by a stop ring 36 fitted onto the tip of the drive shaft 19 .

Both rotational passive parts 29 and 32 protrude from the bearing case 24 to the outside. The connector 37, which serves as a female socket that fits into both rotating passive parts 29 and 32, is a spanner box for rotating a hexagonal nut placed in an appropriate position, as shown by the dashed line in FIGS. 1 and 2, respectively. A cut piece may be used, and this may be gripped onto the chuck 39 of the electric drill 38.

Next, the operation of the above embodiment will be explained. First, when lifting the drum 3 by moving the lifting shaft 5 upward, the connecting tool 39 attached to the electric drill 38 is fitted into the first rotation passive part 29, as shown in FIG. In this case, since the first rotation driven part 29 is inclined, it can be easily operated. after that,
When the electric drill 38 is driven and the electric drill 38 is pressed in the direction of the first rotating passive part 29, the driving side and the passive side of the slip plate 28 are connected, and the rotation of the electric drill 38 is transferred to the operating shaft 19. It is further transmitted to the drive shaft 19 via the second head gear 27 integrated with the operating shaft 26 and the first head gear 23 that meshes therewith, and is decelerated by the worm 18 and the worm wheel 11. It will be boosted. The lifting shaft 5, which is screwed into the threaded groove on the inner peripheral surface of the worm wheel, is moved upward while sliding on the key 12, and the drum 3 is pushed up. At this time, when the stopper 17 of the lifting shaft 5 comes into contact with the gear case 9,
The driving side and the passive side of the slip plate 28 slip, and the connector 37 comes off from the first rotating passive part 29, thereby maintaining safety.

Next, when moving the lifting shaft 5 downward, the connecting tool 37 attached to the electric drill 38 is fitted into the second rotation passive part 32 as shown in FIG. Therefore, since the rotation of the electric drill 38 is transmitted to the second head gear 27 via the third head gear 31, the rotation of the electric drill 38 is transmitted to the second head gear 27.
The rotational direction of the head gear 27, that is, the rotational direction of the drive shaft 19, is reversed from the above-mentioned upward movement, and the elevating shaft 5 is moved downward. That is, the elevating shaft 5 can be moved up and down without using a complicated mechanism such as rotating the electric drill 38 forward or backward.

Since this device raises and lowers the drum 3 using the rotational force of the electric drill 38 as a driving source, it can perform the raising and lowering operations extremely quickly. In addition, the connector 37
It is only necessary to perform a simple operation of fitting the slip plate 28 into the rotation driven parts 29, 32, and the operating force may be enough to bring the slip plate 28 into the connected state. In addition, since the three head gears 23, 27, and 31 switch between raising and lowering operations, the configuration is extremely simple and compact.

Although this invention is constructed as described above, the scope of this invention is not limited by the contents of the above description and drawings, and may include various modified embodiments without departing from the gist. For example, the rotational passive part is not limited to a hexagonal nut shape, but may be a simple cylindrical shape, and a recess and a protrusion for preventing slipping may be provided on the rotational passive part and the connector, respectively, and both male and female shapes may be provided. Of course, it may also be provided. Furthermore, the slip plate as in the above embodiment is omitted, and the abutting portions of the rotating passive part and the connecting tool are formed as friction plates, respectively, and the connecting tool is pressed against the rotating passive part with an appropriate force. In some cases, the rotational force of the electric drill may be transmitted to the rotation driven part via the coupling.

[Effect of idea]

Since this invention is constructed and operates as described above, the drum lifting and lowering device according to this invention uses the rotation of the electric drill as a driving source, so that lifting and lowering operations can be performed extremely quickly. Moreover, if you use a cordless electric drill,
It has the advantage that it can be used even in places where commercial power is not available. Furthermore, since the three head gears are used to switch the drive direction between ascending and descending, the structure is simple and the device can be made smaller and lighter. Furthermore, it can be easily operated without requiring any large operating force or complicated operations.

[Brief explanation of drawings]

Figures 1 to 4 show one embodiment of this invention, with Figure 1 being a cutaway front view of the main parts, Figure 2 being a left side view of the same, Figure 3 being a cutaway plan view of the same, and Figure 4 being a cutaway front view of the main parts. is a front view showing the overall configuration. DESCRIPTION OF SYMBOLS 1... Lifting mechanism, 2... Support part, 3... Drum, 4... Core shaft, 5... Lifting shaft, 6... Support pipe, 11... Worm wheel, 18... Worm, 19... Drive Shaft, 23...first cap gear, 2
6... Operating shaft, 27... Second cap gear, 29...
First rotating passive part, 31...Third head gear, 32
...Second rotating passive part, 33...Rotating body, 37...
...Connection tool, 38...Electric drill.

Claims (1)

[Scope of utility model registration request] In a drum elevating device consisting of a pair of elevators that lifts up and lowers a drum around which electric wires, etc. are wound, by rotatably supporting core shafts protruding from both ends of the drum, each of the elevators has a
An elevating shaft having a support portion for the core shaft at the upper end and inserted into the support pipe so as to be able to move up and down; a boosting reduction mechanism such as a worm gear provided to move the elevating shaft up and down; and a boosting reduction mechanism such as a worm gear. A first head gear fixed to the drive shaft of the reduction mechanism, and a second head gear that meshes with the first head gear are fixed, and the connecting tool is attached to the chuck part of the electric drill at the tip part exposed to the outside. an operating shaft formed with a first rotational passive part that is fitted into the shaft and rotates integrally with the shaft; and a third shaft that meshes with the second shaft gear.
A drum lifting/lowering device comprising: a rotating body integrally provided with a head gear and a second rotary passive part that fits into the connector.