JPH0350152Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a telescoping boom with an overwind detection device that is equipped with a main hook overwind detection device.

(Prior Art) As an example of this type of telescoping boom equipped with an overwind detection device, a wire telescoping boom as shown in FIG. 5 has been used. This conventional wire telescoping boom has a four-stage telescoping structure, and the top boom 104 has an extension wire 111 and a reduction wire 1 which are linked to a telescoping cylinder (not shown).
12 allows the third boom 103 to be extended and retracted. Top boom reduction wire 11
The second top boom connection side end 112a passes through the top boom 104 and is connected to its tip 105. Further, the top boom tip portion 105 has a wire connection operation opening 110 formed on its upper surface (or front surface) for connecting the top boom connection side end 112a of the top boom reduction wire 112 to the tip portion 105a. The tip of the reduction wire 112 can be connected to the top boom tip 105 by inserting a hand through the wire 110 . Note that this opening 110 for wire connection operation is closed with a cover plate 115 as shown by the chain line after the wire end connection operation.

This wire telescoping boom has 1 main hook.
An overwinding detection device for detecting overwinding of No. 19 is provided. This overwind detection device has an overwind detection switch 1 on the side of the top boom tip 105.
32, and connect the overwinding detection device switch 132 and a power supply 129 installed on a base (not shown) of a work cart, etc. to the cord reel 1.
31 and connected by an electrical cord 135 wound around the terminal. In addition, the overwinding detection switch 132
is activated when the main hook 119 is hoisted up to the vicinity of the lower surface of the tip of the top boom (over-hoisted position) and the weight 133 is lifted by the main hook, and the buzzer 130 etc. are actuated by the signal. . code reel 13
1 is attached to the outer surface of the base boom 101, and the electric cord 135 is installed along the outer surface of the telescopic boom.

However, in the conventional wire telescoping boom equipped with an overwind detection device shown in FIG.
Since the cord reel 131 is installed on the outer surface of the telescopic boom, there are problems in that it looks bad and there is a risk that other objects may collide with the cord reel 131 during work.

In addition, as shown in FIG.
31 to base boom 101 or top boom 10
4 is known (Utility Model Application Publication No. 53-121674). However, in this known telescoping boom equipped with an overwind detection device, the cord reels 231, 231 are directly attached to the inner surface of the boom (base boom or top boom), making it difficult to attach the cord reels. is expected.

(Purpose of the invention) In view of the above-mentioned problems with the conventional telescoping boom equipped with an overwind detection device, the present invention makes it possible to effectively use the cover plate that closes the opening provided at the top boom tip, and also allows the cord reel to be connected to the top boom tip. To propose a telescoping boom with an overwind detection device, which allows the cord reel to be easily installed even in a case where the cord reel is stored in the tip of the top boom. The purpose is to

(Means for Achieving the Object) The present invention provides a telescoping boom in which one or more base booms or two or more intermediate booms and a top boom are sequentially arranged in a telescopic manner and an opening is formed at the tip of the top boom. An over-winding detection switch installed at the tip of the top to detect over-winding of the main hook and a power source installed on the base boom side are connected to the cord reel with an electric cord that can be freely pulled out and wound around the power source side. In the telescopic boom with overwind detection device, the cord reel is attached to the cover plate with the cord reel attached to the back side of the cover plate that closes the opening. It is characterized in that it is attached to the edge of the opening while being housed within the tip of the top boom.

(Function) The telescoping boom with an overwind detection device of the present invention has a cord reel attached to the back side of a lid plate that closes an opening provided at the tip of the top boom. Since it is attached to the mouth edge of the opening while stored in the tip, the cover plate can be used both for closing the opening and for attaching the cord reel, and furthermore, the cord reel is not exposed to the outside of the telescopic boom. .

(Embodiments) Several embodiments of the present invention will be described with reference to FIGS. 1 to 4. FIGS. 1 and 2 show the first embodiment of the present invention, and FIGS. The same second
An exemplary wire telescoping boom with overwind detection device is shown.

The wire telescopic boom with an overwind detection device of the first embodiment shown in FIGS. 1 and 2 sequentially telescopes a base boom 1, two intermediate booms (second boom and third boom) 2, 3, and a top boom 4. The top boom 4
Connect the telescopic wires 11 and 1 to the third boom 3.
A wire telescopic boom Z that can be extended and retracted by means of the wire boom Z is provided with an overwinding detection device Y for the main hook 19.

The base boom 1 and the second boom 2 are mutually extendable and retractable by a first telescopic cylinder 6, and the second boom 2 and third boom 3 are mutually telescopic by a second telescopic cylinder 7. Further, the top boom 4 is connected to the third boom 3 by an extension wire 11 that is operated when the second telescoping cylinder 7 is extended, and by a reduction wire 12 that is operated when the second telescoping cylinder 7 is retracted. It is designed to be expanded or contracted.

The extension wire 11 is made by folding one wire back into a U shape, fixing each end of the wire to the upper part of the tip of the second boom 2, and connecting it to the base of the top boom 4 via a sheave 13 provided at the upper part of the tip of the third boom 3. It is stretched around a wire guide 14 provided on the upper end side.

The reduction wire 12 also uses one wire as U.
After folding it back into a shape, passing each end 12a, 12a through the top boom 4 and fixing it to the front surface of the tip 5, and wrapping it around the sheave 17 provided near the proximal end of the second cylinder, the first telescopic It is stretched around a wire guide 18 provided near the tip side of the cylinder 6.

And with this telescopic boom, the second boom 2
When the third boom 3 is extended, the extension wire 11 causes the top boom 4 to extend relative to the third boom 3. Conversely, when the third boom 3 is reduced relative to the second boom 2, the reduction wire 11 causes the top boom 4 to extend relative to the third boom 3. Top boom 4 by 12
is now being reduced relative to the third boom 3.

Like this kind of telescopic boom, the shrinking wire 12
In the case where the tips 12a, 12a of the top boom 4 are passed through the top boom 4 and fixed to the front surface of the tip 5, the tip 12a of the reduction wire 12 is attached to the top or front surface of the top boom tip 5. Usually, a wire connection operation opening 10 for connection operation is formed. In this first embodiment, the wire connection operation opening 10 is formed on the upper surface of the top boom tip 5. This wire connection operation opening 10 is closed with a cover plate 15, which will be described later, after inserting a hand through the opening 10 and connecting the tips 12a, 12a of the reduction wire 12 to the front surface of the top boom tip 5.

On the other hand, the overwinding detection device Y of the main hook connects an overwinding detection switch 32 provided on one side of the tip 5 of the top boom 4 and a power source 29 provided on a base such as a work trolley to the cord reel 31. The connection is made by an electrical cord 35 that is freely wound, and a buzzer 30 is provided in the middle of the electrical cord 35. The electric cord 35 wound around the cord reel 31 can be freely drawn out to the power source 29 side.

This over-winding detection switch 32 is operated when the main hook 19 is hoisted up to near the bottom surface of the top boom head 5 (over-winding position) and the main hook 19 pushes up the weight 33. There is. When this overwinding detection switch 32 is operated, the buzzer 3 is activated by the signal.
0 is activated and the pilot is given main hook 19.
It is becoming known that the winding is over-winding.

The cord reel 31 is attached to the back side of a cover plate 15 that closes the wire connection operation opening 10 provided on the top surface of the top boom tip 5.
A downwardly protruding plate-shaped cord reel support 16 is integrally connected to the back surface of the cover plate 15, and a cord reel 31 is attached to the side surface of the cord reel support 16. And this cover plate 1
A cover plate 9 with a cord reel, which has a cord reel 31 attached to the cord reel 5, connects the cord reel 31 and the cord reel support 16 to the opening 1 for wire connection operation.
After inserting it into the top boom tip 5 from 0,
The lid plate 15 is attached to the edge 1 of the opening 10 for wire connection operation.
It can be installed by bolting to 0a. In this mounting structure of the cover plate 9 with cord reel, the cord reel 3
1 is stored in the top boom tip 5,
Not exposed to the outside.

Note that a hole 36 is formed in the cover plate 15 for inserting the electric cord 35, and the cord reel 31
Pass one end (power supply connection side end) of the electric cord 35 pulled out from the hole 36 and through the sheep 37 between the lower surface of the upper surface plate of the third boom 3 and the upper surface of the upper surface plate of the top boom 4 to the power source 29 side. guiding. This electric cord 35 is
7, the wire may be led to the power supply 29 through the upper surface of the telescoping boom, or the wire may be led to the power supply 29 through the top of the top boom
It may also be led directly to the power source 29 through the inside. or,
Electrical cord 3 wound around cord reel 31
The other end of the top boom 5 is connected to the switch 32 through a hole 38 provided in the side surface of the top boom tip 5. When the cover plate 9 with a cord reel is placed over the opening 10, the end of the electrical cord 35 on the side connected to the switch 32 must be dropped into the top boom tip 5 from above through the opening 10, and then be inserted into the top boom tip 5. Insert your hand through a suitable opening in the top boom tip 5 and insert the end of the electrical cord 35 into the hole 38 provided on the side of the top boom tip 5.
and connect it to the switch 32 side.

The electric cord 35 wound around the cord reel 31 is pulled out from the cord reel 31 when the telescoping boom is extended, and on the contrary, when the telescoping boom is contracted, it is automatically pulled out from the cord reel 31. It's starting to be rewound.

The wire telescoping boom with overwinding detection device of the second embodiment shown in FIGS. 3 and 4 is a modification of the first embodiment. is formed on the front surface of the top boom tip 5, and a cover plate 9 with a cord reel is formed on the front surface of the top boom tip 5.
The cord reel support 26 is constructed by integrally connecting a vertical plate-shaped cord reel support 26 to the back surface of a vertically oriented cover plate 25, and attaching a cord reel 31 to the side surface of the cord reel support 26. This cover plate 9 with a cord reel is constructed by inserting the cord reel support 26 and the cord reel 31 into the top boom tip 5 through the wire connection operation opening 20.
The lid plate 25 is attached to the edge 2 of the opening 20 for wire connection operation.
It is attached by bolting to 0a. In addition, the electric cord 35 wound around the cord reel 31
Before attaching the cord reel-equipped cover plate 9 to the edge of the wire connection operation opening, the power supply side end of the top boom is inserted through the hole 39 provided in the wire connection operation opening 20 and the top surface of the top boom tip 5 in advance. Guide it above part 5.

In each of the first and second embodiments described above, the cover plate 15 that closes the wire connection operation openings 10 and 20;
25 is shared by the lid and the cord reel 31 mounting member, so it can be used effectively.Furthermore, the lid plate 15 can be used as the opening 10 of the opening 10, 20 for wire connection operation.
By fixing the cord reel 31 to the top boom tip 5, the cord reel 31 can be installed while being housed inside the top boom tip 5.

In addition, although the wire telescoping boom was described in the above embodiment, telescoping booms other than the wire telescoping boom also have an opening at the tip of the telescoping boom for changing the number of wires, etc. Of course, the cord reel may be attached using a lid plate that closes the opening.

(Effect of the invention) The telescoping boom with an overwind detection device of the present invention has a cord reel 31 for the overwind detection device on the back side of the cover plates 15, 25 that close the openings 10, 20 formed at the top boom tip 5. Since the lid plates 15 and 25 are attached, the lid plates 15 and 25 can be used (effectively used) as the lid and the cord reel mounting member, and the cord reel 31 is attached to the lid plates 15 and 25. The cover plate 9 is attached to the cord reel 3.
Since the cord reel 31 is housed in the top boom tip 5 and attached to the edges of the openings 10 and 20, the cord reel 31 is not exposed to the outside and has a good appearance.
It is possible to prevent troubles such as collisions with other articles, and even in the case of a mounting structure in which the cord reel 31 is housed inside the top boom tip 5, the cord reel 31 can be directly attached to the inner wall surface of the top boom tip 5. This has the effect that the installation work is simpler than in the case of the conventional method.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a telescoping boom with an overwind detection device according to a first embodiment of the present invention, Fig. 2 is a partial perspective view of Fig. 1, and Fig. 3 is a cross-sectional view of a telescoping boom with an overwind detection device according to a first embodiment of the present invention. FIG. 4 is a partial perspective view of FIG. 3, and FIG. 5 is a side view of a conventional telescopic boom with an overwind detection device.
The figure is a sectional view of another conventional telescopic boom with an overwind detection device. 1... Base boom, 3... Intermediate boom (third boom), 4... Top boom, 5... Top boom tip, 7... Telescopic cylinder, 9... Lid plate with cord reel, 10... Connection operation opening ,1
1... Wire for extension, 12... Wire for reduction, 1
2a...Top boom connection side end, 15...Lid plate,
16...cord reel support, 19...main hook, 29...power supply, 30...buzzer, 31...
...cord reel, 32...overwind detection switch,
35... Electrical cord, Y... Overwinding detection device, Z...
...Telescopic boom.

Claims (1)

[Scope of utility model registration request] Base boom 1 and one or more intermediate booms 3
and a top boom 4 are arranged in sequence in a telescopic manner, and openings 10 and 20 are formed in the top boom tip 5. A telescoping boom Z is provided with a telescoping boom Z having openings 10 and 20 formed in the top boom tip 5, and detects over-hoisting of the main hook 19. A main hook 1 is constructed by connecting an overwinding detection switch 32 and a power source 29 provided on the base boom 1 side to a cord reel 31 with an electric cord 35 wound so as to be freely drawn out to the power source 29 side.
A telescoping boom with an overwinding detection device Y, which is equipped with an overwinding detection device Y of 9, and includes a cord reel in which the cord reel 31 is attached to the back side of the cover plates 15, 25 that close the openings 10, 20. The cord reel 31 connects the lid plate 9 to the top boom tip 5.
1. A telescoping boom with an overwind detection device, characterized in that the boom is attached to the edges 10a, 20a of the openings 10, 20 while housed inside the boom.