JPS6111402Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for lifting and lowering heavy objects, particularly building members, using threaded reinforcing bars.

Conventionally, there has been a device of this type as shown in FIG.

In FIG. 1, 1 is a heavy object to be lifted and lowered,
A wire 2 serving as a hanging material is fixed to a heavy object 1 with a fixture 3.

The hydraulic jacks 4 and 5 for lifting and lowering are fixed to the platform. 7 is a protection device against overload, 8 and 9 are
are guide tubes above and below the wire, and 10 is a safety device to prevent the wire 2 from slipping.

The wire 2 passes through the lower guide tube 8, the protection device 7, the hydraulic jacks 4 and 5, and the upper guide tube 9, and is fixed by a pawl built into the hydraulic jacks 4 and 5.

Next, the operation will be explained.

The claws built into the hydraulic jacks 4 and 5 alternately bite the wire 2 to raise or lower the heavy object 1.

Conventional lifting devices are constructed as described above, and use wire as a hanging material. Wire has the advantage of being easily made to the required length, but it is difficult to use wire by biting it with your nails. It was necessary to raise and lower the wire by holding it in place, and this had disadvantages such as slipping between the wire and the pawl and damage to the wire itself.

This idea was made in order to eliminate the drawbacks of the conventional ones as mentioned above. By using threaded reinforcing bars for the hanging material, it is a safe and reliable lifting device that does not slip and does not damage the hanging material. is intended to provide.

An embodiment of this invention will be described below.

In FIG. 2, 1 is a heavy object to be lifted and lowered, and 2 is a metal fitting for fixing the threaded reinforcing bars of the hanging material.

Threaded reinforcing bar 12 is connected to this device.

The main body of the apparatus is fixed on a support beam 3 with bolts 17, and a heavy object 1 is suspended from the apparatus fixed on the support beam 3 via threaded reinforcing bars 12.

Next, the configuration of the lifting and lowering operation will be explained.

In the lifting/lowering operation, the rotational force of the motor 4, which is the driving force, is first reduced by the reducer 5 and transmitted to the sprocket 7 through the overload safety device 6.

The sprocket 7 and the sprocket 9 on the spindle side are connected by a chain 8.

The sprocket 9 and the nut 10 held by the rotation bearing are integrally constructed, and when the sprocket 9 rotates, the nut 10 rotates and the spindle 11 moves up and down.

(The spindle 11 does not rotate.) The spindle 11 is connected to the vertically movable beam 18 by a pin,
A screw reinforcing bar 12 is attached to a nut 13 in the center of the moving beam 18.
a, It is suspended by a washer 14a, and by moving the spindle 11 up and down, the heavy object 1 is moved up and down via the moving beam 18 and the threaded reinforcing bar 12. Moving beam 1
8 is moved up and down along the column by a guide roller 15 and stopped at a stopper 16.

The screw reinforcing bar 12 is also suspended from the fixed beams 3 and 3' by nuts 13b and washers 14b. Now, when lifting a heavy object 1, the motor 4 rotates the nut 10 (clockwise when viewed from above in Fig. 2), and when the spindle 11 is pulled up, the movable beam 1
8. The nut 13a, washer 14b, and screw reinforcing bar 12 rise, and the heavy object 1 also rises. At this time Natsuto 13
Since b rises together with the threaded reinforcing bars, it separates from the fixed beams 3 and 3'.

When the movable beam 18 rises to the point where it hits the stopper 16, turn the nut 13b.
The washer 14b is lowered until it touches the fixed beam 3'.

In this way, the load of the heavy object 1 will be borne by the fixed beams 3, 3'. Thereafter, the motor 4 is rotated to lower the movable beam 18 to a position where it hits the stopper 16'. At this time, the nut 13a and the moving beam 1
8 are apart, so turn the nut 13a so that the nut 13a and the washer 14a are in contact with the moving beam 18. If the nut 10 is rotated again by the motor 4, the spindle 11 will rise, and therefore the heavy object 1 will also rise.

When descending, do the opposite.

Now, the threaded reinforcing bar 12 is manufactured or handled as follows.
Since the length is limited to about 5 to 10 m, they are connected using joint fittings 19, but at this time, two nuts 13 are attached to the threaded reinforcing bars in each connection part in advance.
Attach a, 13b, 20, 21...
Also, the washers 14a, 14b, . . . have a structure that can be divided into two.

Next, we will discuss the treatment of the joint.

When lifting a heavy object using this device, an example will be described regarding the jumping operation of the joint of the threaded reinforcing bar when it comes to the lifting device part.

As shown in FIG. 3, when the joint comes directly under the fixed beam 3', first lower the movable beam 18 to the lowest position, then tighten the nut 13a so that the load is applied to the nut 13a.
Tighten and fix 3a. Next, while raising the movable beam 18 together with the screw reinforcing bar 12, the lower washer 14b
When removed, the joint fittings 19, nuts 20, and 21 pass through the middle of the fixed beam 3', resulting in the position shown in FIG. 4.

In FIG. 4, first, attach the washer 14b,
Tighten the nut 21 with the tool 22. Next, the moving beam 18 is lowered. At this time, the nut 13b, the joint fitting 19, and the nut 20 pass through the middle of the moving beam 18, and are in the position shown in FIG.

In FIG. 5, the washer 14a is attached, the nut 20 is tightened and fixed, and the screw reinforcing bar is lifted by the moving beam 18.

The same operation is repeated thereafter, but when there is no joint, only the nuts 13a and 13b or the nuts 20 and 21 are rotated, and the washers 14a and 14b do not need to be removed.

To descend, do the opposite of the above.

As described above, according to this invention, a commercially available threaded reinforcing bar is used as a hanging material, the stroke of the lifting device is made greater than the joint length and the attachment in order to jump over the joint of the threaded reinforcing bar, and a motor or hydraulic jack is used for power. The beam moves the force through the nut for each iteration,
The structure allows heavy objects to be lifted and lowered while being alternately placed on fixed beams, making the equipment inexpensive, and since there is no slippage at the holding part, work can be done with high precision and safety. Since you can add as many pieces as you like, you can raise and lower them to the desired height.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a conventional lifting device. FIG. 2 is a side view showing the entire invention. Figure 3, Figure 4,
FIG. 5 is an explanatory view sequentially showing the implementation of the joint passage according to the present invention. 1...Heavy object, 4...Motor, 5...Reducer, 11
...Spindle, 12...Screw reinforcing bar, 13a/13b
...Nut, 14a/14b...Washer, 16/16'
...Stopper, 21...Natsuto.

Claims (1)

[Scope of utility model registration request] A device for lifting and lowering heavy objects, characterized in that threaded reinforcing bars connected by joint fittings are used as hanging materials, and the joints can pass through the device, allowing the heavy objects to be lifted and lowered. lift device.