JP2002241085A - Electric hoist - Google Patents

Abstract

(57) [Summary] (With correction) [PROBLEMS] To provide an electric hoist capable of efficiently slinging. An electric trolley (2) mounted on a traveling rail (1) is suspended by engaging an upper hook (4) of an electric chain block body (3) and hanging from the electric chain block body (3). A load hook block 6 is attached to the tip, and a sling (not shown) is attached to the load hook 7 attached to the load hook block 6.
And transport the suspended load (elevation and traverse). The electric trolley 2 includes a traveling drive motor 21,
The vehicle travels on the traveling rail 1 by the traveling wheels 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an electric hoist.

[0002]

2. Description of the Related Art An electric hoist such as an electric chain block or an electric hoist is installed by suspending a main body of a hoist on an electric trolley running on a traveling rail mounted on a ceiling of a building or the like. The lifting and lowering and traversing of the suspended load is carried out by the load hook of the load block engaged with the load chain or the wire rope for unwinding and winding by the machine body. A worker located on the ground performs the work of attaching and detaching (sling) the suspended load to and from the load hook, and also performs an operation control operation of the electric trolley and the main body of the hoist by the worker located on the ground.

[0003] Since the electric trolley and the electric hoist main body are located at a high place, an operating device for controlling the operation of the electric trolley and the electric hoist main body is placed near the ground by a suspension wire or electric wire. And a push-button switch box that is suspended and installed so as to be located at a location on the ground, and a wireless operation switch box that is separated from the electric trolley and the electric hoist body and positioned on the ground.

[0004] An electric hoist such as a large crane is often used so that another person performs the slinging operation and the operation control operation. However, an electric hoist such as a small electric hoist or an electric chain block is used. It is often used so that one worker performs a slinging operation and an operation control operation.

[0005]

By the way, in the slinging operation when lifting a suspended load, the load hook is hooked on a sling such as a slinging rope or a slinging chain, and the load hook is lifted little by little while being held by hand. The operation of the electric hoist is controlled by operating the operation device. In such a sling operation, it is necessary for the operator to repeatedly and alternately observe the engagement state of the sling and the load hook, the engagement state of the suspended load and the sling, and the operation state of the operating device. When the position of the (load hook) and the operating device are far from each other, the working efficiency is significantly reduced.

An object of the present invention is to propose an electric hoist capable of efficiently performing a slinging operation.

[0007]

SUMMARY OF THE INVENTION The present invention relates to an electric hoist equipped with an operating device such as a push button switch box or a wireless operation switch box, wherein the operating device is detachably mounted on a load hook block. It is characterized in that a holding tool is provided.

[0008]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIGS.

FIG. 1 shows an electric chain block according to an embodiment of the present invention, and FIGS. 2 to 8 show examples of the operation device fixing device.

FIG. 1 is a front view (a) and a side view (b) of an electric chain block, and an upper hook 4 of an electric chain block main body 3 is mounted on an electric trolley 2 mounted so as to run on a traveling rail 1. And a load hook block 6 is attached to the end of the load chain 5 suspended from the electric chain block body 3, and a load hook 7 attached to the load hook block 6 is attached.
A sling (not shown) is hooked on the vehicle to carry (lift and traverse) the suspended load.

The electric trolley 2 has a traveling drive motor 21 and travels on the traveling rail 1 by traveling wheels 22.

The electric chain block main body 3 incorporates a lifting drive motor 31, a speed reduction mechanism 32, a play mechanism 33, and a sprocket 34, and unwinds the load chain 5 engaged with the sprocket 34 by the sprocket 34.
It is wound up and down the load block 6 (load hook 7). The load chain 5 wound by the sprocket 34 is housed in the chain bucket 8.

The operating device 9 in this embodiment is configured such that a push button switch box 92 connected to the electric chain block main body 3 and the electric trolley 2 by an electric wire 91 is hung from the electric chain block main body 3 by a suspension line 93. This push button switch box 92
Is a form that can be detachably attached to the controller holder 10 attached to the load hook block 6.

FIG. 2 is an enlarged view showing one embodiment of the load hook block 6, the load hook 7, and the operating device holder 10, wherein FIG. 2 (a) is a top view and FIG. 2 (b) is a front view. .

The load hook block 6 has a structure in which half block pieces 61 and 62 are combined so as to sandwich the load chain 5 and the load hook 7 and are connected by connecting screws 63 and 64.

The operating device holder 10 is attached to the distal ends of the mounting bases 101 and 102 which are attached by screwing and fixing the distal ends of the coupling screws 63 and 64.
In this configuration, the base ends of the base plates 03 and 104 are clamped by a thumb screw 105 so as to be able to turn. Nipping piece 10
Reference numerals 3 and 104 denote a push button switch box 9 which is formed in the middle of the bulging space by forming an bulging space in the middle, and having a distal end facing the divergent shape.
The push button switch box 92 is removably mountable by elastically holding the push button switch 2.

In order to attach / detach and hold (hold) the push button switch box 92 between the holding pieces 103 and 104, the opposing distance between the holding pieces 103 and 104 should be inserted into the bulging space in the natural state. The distance between the portions facing the push-button switch box 92 is slightly smaller than the external dimensions of the push-button switch box 92, and the push-button switch box 92 pushed into the portion is elastically clamped. The opening intervals of the parts are desirably opened so that the push button switch box 92 to be pushed in can be easily received.

According to such an electric chain block, the push button switch box 92 is used during slinging operation.
Is pressed into the space between the bulging portions of the holding pieces 103 and 104 from the distal end portions of the holding pieces 103 and 104 of the operating tool holder 10 to be held adjacent to the load hook block 6.

If a sling operation is performed in this state, the worker can hook the sling on the load hook 7 and operate the push button switch box 92 to obtain an engagement state between the sling and the load hook 7 and a suspended load. The operating state of the push button switch box 92 and the engagement state of the push button switch box 92 can be observed at a glance, and the working efficiency is improved.

FIGS. 3A and 3B show another embodiment of the operation holder 10, in which FIG. 3A is an enlarged top view showing the load hook block 6, the load hook 7, and the operation device holder 10, and FIG. ) Is the front view, and (c) is the side view.

The operating device holder 10 according to this embodiment
In this example, the holding table 107 is pivotally mounted so that the distal end of the mounting table 106 attached by screwing and fixing to the distal end extensions of the coupling screws 63 and 64 of the load hook block 6 is sandwiched by the base end. Holding piece 108 on holding table 107
Is elastically extended and movable, and the push button switch box is elastically held between the upright portion 107a of the holding table 107 and the holding piece 108.

The holding piece 108 is positioned so as to be opposed to the upright portion 107a at a slightly smaller interval than the outer dimensions of the push button switch box in a state where the holding piece 108 is pulled in the direction of the upright portion 107a by a holding spring (not shown). In advance,
The push button switch is retracted by being pushed and expanded by the push button switch box, so that the push button switch is raised and the holding piece 1 is held.
08 to allow intrusion. And the holding piece 1
Reference numeral 08 makes the push-button switch box removably attachable by moving the pushed-in switch button box so as to be elastically held between the push-button switch box and the standing portion 107a by the pulling force of the holding spring.

With such an operating device holder 10,
The push button switch box 92 can be held in the same manner as in the above-described embodiment, and efficient staking work can be performed.

Further, in these embodiments, since the operating device holder 10 can change the coupling angle of the holding pieces 103, 104 and the holding table 107 with respect to the mounting tables 101, 102, 106, FIGS. As shown in FIG. 5, the push button switch box 92 can be held at a posture at an angle that is easy to operate.

Next, an embodiment using a wireless operation switch box as the operation device in the above-described embodiment will be described. Although illustration is omitted, in this embodiment, the wireless operation switch box is configured to communicate with the electric chain block main body by infrared communication to control the electric chain block main body 3 and the electric trolley 2.

In the infrared communication, since the directivity of signal transmission / reception is strong, it is desirable that the wireless operation switch box is oriented toward the electric chain block body 3 in order to perform stable wireless operation. In this embodiment, the holding pieces 103, 1 of the operating tool holder 10 with respect to the mounts 101, 102, 106 are adjusted in accordance with a change in the relative positions of the electric chain block main body 3 and the load hook block 6.
By changing the coupling angle between the support block 04 and the holding table 107, the wireless operation switch box can be set in a posture facing the direction of the electric chain block body 3.

The operating device holder 10 in each of the above-described embodiments is mounted on the load hook block 6. These operating device holders 10 are mounted on the operating device 9 and held on the load hook block 6. It can be deformed to hold it.

FIG. 6 shows an embodiment in which the operating device holder 10 as described in the embodiment shown in FIGS. 1, 2 and 4 is attached to the push button switch box 92. (a) is a top view of the operating device holder and the push button switch box, and (b) is a side view of the same.

In this embodiment, the operating device holder 1
Numeral 0 denotes holding pieces 111 and 112 at the distal ends of the mounting stands 109 and 110 mounted on the push button switch box 92.
Is fastened with a thumbscrew 113 with the base end of the base member interposed therebetween so as to be rotatable. Hugging pieces 111, 11
2 is formed by an elastic member that forms a swelling space in the middle and opposes so as to open the front end in a divergent shape;
The load hook block is elastically embraced in the bulging interval to allow the push button switch box 92 to be detachably attached to the load hook block.

In order to detachably hold (hold) the load hook block between the hugging pieces 111 and 112, the facing distance between the hugging pieces 111 and 112 is set at the bulging space in the natural state. The distance between the portions facing the load hook block to be embraced is slightly smaller than the outer dimension of the load hook block, and the load hook block is elastically hugged on the load hook block pushed into the portion. It is desirable to open the load hook block so that it can be easily received.

FIG. 7 shows an embodiment in which the operating device holder 10 as described in the embodiment shown in FIGS. 1, 3 and 5 is attached to a push button switch box 92. (a) is a top view of the operating device holder and the push button switch box, (b) is a side view thereof, and (c) is a front view thereof.

In this embodiment, the operating device holder 1
Numeral 0 denotes a base 11 with a hugging so that the distal end of the mounting base 114 attached to the push button switch box 92 is sandwiched by the base end.
5 is attached so as to be able to turn, and the holding piece 116 is elastically attached to the holding base 115 so as to be able to expand and move. The load hook block is elastically provided between the upright portion 115a of the holding base 115 and the holding part 116. It is a configuration to embrace.

The hugging piece 116 is positioned so as to be opposed to the upstanding portion 115a at a slightly smaller interval than the outer dimensions of the load hook block while being pulled in the direction of the upstanding portion 115a by a hugging spring (not shown). Then, the load hook block is retracted by being pressed against the load hook block and expanded, so that the load hook block is raised.
5a and can be pushed into between the holding piece 116. Then, the hugging piece 116 moves the push-button switch box 92 to the load hook block by elastically hugging the pushed-in load hook block and the standing portion 115a by the pulling force of the hugging spring. It functions so that it can be attached detachably.

In this embodiment, as shown in FIG. 8, by attaching a permanent magnet piece 117 to the surface of the holding table 115, the embodiment can be deformed so as to be held on the load hook block by magnetic force. . 8A is a top view of the operating device holder and the push button switch box, FIG. 8B is a side view thereof, and FIG. 8C is a front view thereof.

Since the load hook block in the electric chain block is made of magnetic metal, the pushbutton switch box 92 can be held and held by the load hook block by the electromagnetic attraction force of the permanent magnet piece 117. .

The operating device holder 10 in each of the embodiments shown in FIGS. 6 to 8 can be held and held by other members in the working environment in addition to being held by the load hook block. Can also. Further, the push button switch box 92 can be replaced with a wireless operation switch box.

Although the electric chain block has been described above, the present invention can be similarly applied to electric hoists and other electric hoists.

[0038]

According to the present invention, when performing a slinging operation or the like, the operating device can be held at a position where it can be easily operated, so that the working efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a front view (a) and a side view (b) of an electric chain block showing an embodiment of the present invention.

FIGS. 2A and 2B are enlarged views of a load hook block, a load hook, and an operating device holder according to an embodiment of the present invention, wherein FIG. 2A is a top view and FIG.

FIGS. 3A and 3B show another embodiment of the operating device holder according to the present invention, in which FIG.
(B) is the front view, (c) is the side view.

FIG. 4 is a front view showing a holding position of a push button switch box in the embodiment shown in FIG. 2;

FIG. 5 is a front view showing a holding position of the push button switch box in the embodiment shown in FIG. 3;

FIGS. 6A and 6B show another embodiment of the operating device holder according to the present invention, wherein FIG. 6A is a top view of the operating device holder and the pushbutton switch box, and FIG. 6B is a side view thereof.

7A and 7B show another embodiment of the operating device holder according to the present invention, wherein FIG. 7A is a top view of the operating device holder and the pushbutton switch box, FIG. ) Is the front view.

8A and 8B show another embodiment of the operating device holder according to the present invention, wherein FIG. 8A is a top view of the operating device holder and the pushbutton switch box, FIG. 8B is a side view thereof, and FIG. ) Is the front view.

[Explanation of symbols]

3 ... Electric chain block body, 6 ... Load hook block, 9 ... Operator, 9 ... Push button switch box, 1
0: Operating device holder.

Claims (4)

[Claims] 1. An electric hoist having operating devices such as a push button switch box and a wireless operation switch box, wherein an operating device holder for detachably mounting the operating device on a load hook block is provided. And electric hoist. 2. The electric hoist according to claim 1, wherein the operating device holder is attached to the load hook block so as to elastically hold the switch box of the operating device. 3. The operating device holder according to claim 1,
An electric hoist, which is provided in a switch box of an operating device and is configured to be elastically held on a load hook block. 4. An electric hoist according to claim 1, wherein said operating device holder is configured to be capable of turning.