JP2560447Y2 - Automatic bag opener - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag automatic opening device which is effective for a bag having an opening on the lower side, for example, a material bag containing an additive used for ground stabilization.

[0002]

2. Description of the Related Art When constructing a landfill or the like, ground stabilization processing is performed by introducing an additive such as lime or cement into the ground, and FIG. FIG.

In FIG. 1, reference numeral 1 denotes a material bag containing an additive, which has an opening 1a at the lower end.
Tied up and closed. On the other hand, on the ground side, an input pipe 3 whose lower end is embedded in the ground is installed.
A pillar 4 is attached beside the. A hopper 5 is attached to an upper end of the input pipe 3, and a scaffold 6 is assembled around the hopper 5.

[0004] Conventionally, the operation of adding an additive is performed as follows.

[0005] First, the material bag 1 is lifted by a crane or the like (not shown) and transported to a position directly above the hopper 5. Next, the worker climbs up to the scaffold 6 and releases the cord 2 of the material bag 1 to open the opening 1.
By releasing a, the additive is discharged into the hopper 5.

[0006]

However, in the above-mentioned prior art, however, there is a problem that the worker has to go up to the scaffold 6 and open the material bag 1 every time a loading operation is performed, which requires a great deal of labor. . Further, since the operation is performed at a high place, there is a problem that the danger is extremely high for an operator and an accident is easily caused.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an automatic bag opening device capable of automatically opening a bag.

[0008]

According to a first aspect of the present invention, there is provided an automatic bag opener for sealing a bag which removably sandwiches an upper portion of an opening provided on a lower side of the bag. Department and
A lock mechanism for releasing the sandwiched state by holding the bag sealing portion in the sandwiched state and operating the bag upward, and a weight connected to the lock mechanism via a loop-shaped member having a predetermined length. Have.

A bag automatic opening device according to a second aspect of the present invention includes, in addition to the configuration of the first aspect, a protection portion for protecting an operation area of the lock mechanism.

The automatic bag opening device according to a third aspect of the present invention includes a hook capable of being fixed to the bag in addition to the configuration of the first or second aspect.

[0011]

According to the automatic bag opening device of the first aspect, the opening of the bag is closed by sandwiching and locking the upper part of the opening of the bag with the bag sealing portion. When the contents of the bag are transferred to a predetermined container, the lower end of the bag is lowered into the container with the weight of the loop-shaped member positioned outside the container opening. At this time, when the locking mechanism descends below the edge of the container, the intermediate portion of the loop-shaped member that locks on the edge of the container becomes higher than the position of the locking mechanism, and the tension of the loop-shaped member increases. Act on As a result, the lock mechanism operates upward to release the lock of the bag sealing portion, and the opening of the bag is automatically opened.

According to the second aspect of the present invention, the automatic opening device of the bag has the function of the first aspect, and the operation area of the lock mechanism is protected by the protection portion, so that the operation of the lock mechanism is reliably performed.

According to the third aspect of the present invention, the automatic opening device of the bag has the function of the first or second aspect, and the hook is fixed to the bag to lock the bag sealing portion. Even if it is released, the automatic opener itself does not fall.

[0014]

1 to 4 show an embodiment of the present invention.

In FIG. 1, reference numerals 10 and 11 denote first and second sandwiching plates which form a bag sealing portion, and are made of a steel plate having a uniform height. One end of each of the sandwiching plates 10 and 11 is connected to each other via a hinge shaft 12, and can be rotated around the hinge shaft 12 as shown in FIG. The first sandwiching plate 10 is formed in an elongated flat plate shape, and has a substantially central portion perforated in a square shape. Further, the second sandwiching plate 11 is formed in an elongated plate shape, and a substantially central portion thereof is formed by the first sandwiching plate 1.
It curves to the opposite side to 0. Each sandwich plate 10, 11
The other end side of each has a step portion 10a having a lower end side,
A step 11a is formed, and the steps 10a, 11a coincide with each other when the sandwiching plates 10, 11 are closed. Further, mounting plates 13 and 14 for mounting hooks 20 described later are welded to side surfaces of the sandwich plates 10 and 11, respectively.

Reference numeral 15 denotes a lock plate attached to the second sandwiching plate 11. The lock plate 15 is used for the second sandwiching plate 11.
Movable portion 15a connected to the side surface of
From the intermediate portion of the movable portion 15a to the step portions 10a, 11
The movable portion 15a has a hole 15c for connecting a chain 18 to be described later. . That is, the sandwiching plates 10 and 11 are closed and the lock plate 15 is closed.
Is lowered, the locking portion 15b covers the steps 10a and 11a. Thereby, the side surface of the first sandwiching plate 10 hits the locking portion 15b, and the rotation of the sandwiching plates 10, 11 is prevented. When the locking plate 15 is rotated upward as shown in FIG. 3 and the locking portion 15b exceeds the locking range with the first holding plate 10, the first holding plate 10 is released, and each holding plate 15 is released. 1
The rotation between 0 and 11 becomes possible.

Reference numeral 17 denotes a weight made of hard rubber or the like, which is connected to the movable portion 15a of the lock plate 15 via a chain 18 as a rope-like member. Note that a wire or the like may be used instead of the chain 18.

Reference numeral 19 denotes a protection plate provided above the lock plate 15, which is welded to the upper end of the second sandwiching plate 11. The protection plate 19 is formed to be warped upward so as not to hinder the rotation of the lock plate 15.

Reference numeral 20 denotes a hook attached to each of the sandwiching plates 10 and 11, respectively.
14 via a chain 21.

Here, the operation of the automatic bag opener configured as described above will be described with reference to FIGS. 4 (a) and 4 (b). Note that the same reference numerals are given to the same products as the conventional example. That is,
1 is a material bag, 1a is an opening, and 5 is a hopper.

First, the sandwiching plates 10 and 11 are attached to the upper part of the opening 1a of the material bag 1. At this time, the string between the opening 1a and the opening 1a is sandwiched between the sandwiching plates 10 and 11, and after the sandwiching plates 10 and 11 are locked, the string is released. At this time, the hook 20 is connected to an appropriate position of the material bag 1. Next, the material bag 1 is lifted by a crane or the like (not shown), transported to just above the hopper 5, and the material bag 1 is lowered so that the weight 17 comes out of the hopper 5. At this time,
When the lock plate 15 descends below the edge of the hopper 5, the intermediate portion of the chain 18 which is locked to the edge of the hopper 5 becomes higher than the position of the lock plate 15, and the tension of the chain 18 is reduced. Acts upward. As a result, the lock plate 15 rotates upward to release the lock of the sandwiching plates 10 and 11, and the opening 1 a of the material bag 1 is opened. At that time, each sandwich plate 1
Although 0 and 11 are removed from the material bag 1, they do not fall because the hook 20 is connected to the material bag 1 and are collected together with the empty material bag 1. Further, the material bag 1 may bulge out and cover the upper part of the lock plate 15 depending on the contents.
Is secured, and the opening operation described above is not hindered.

As described above, according to the automatic bag opener of this embodiment, the locks of the sandwiching plates 10 and 11 can be released only by lowering the lower end of the material bag 1 into the hopper 5. The material bag 1 can be automatically opened.
Therefore, since the material bag 1 can be opened even if the worker does not climb to a high place, it is safe and the labor force can be greatly reduced. Further, since the sandwiching plates 10 and 11 are connected to the material bag 1 by the hooks 20, they do not fall even after the material bag 1 is opened, and can be reliably collected together with the empty material bag 1. Furthermore, even if the material bag 1 swells,
Since the rotation area of the lock plate 15 is protected by the protection plate 19, the opening operation can be reliably performed.

[0023]

As described above, according to the automatic bag opening device of the first aspect, the opening of the bag can be automatically performed. ,
Workers can open the bag without climbing to high places,
It is safe and can significantly reduce labor.

Further, according to the automatic bag opening device of the second aspect, the effect of the first embodiment can be achieved, and the automatic opening device itself does not fall even after the opening of the bag, so that the empty automatic bag opening device is used. And can be reliably collected.

Further, according to the bag automatic opening device of the third aspect, the effect of the first or second aspect can be achieved and the rotation region of the lock mechanism can be protected, so that the opening operation of the bag can be performed. It can be done reliably.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of an automatic bag opening device according to an embodiment of the present invention.

FIG. 2 is a top view of the automatic bag opening device according to the embodiment of the present invention.

FIG. 3 is a side view of the automatic bag opening device according to the embodiment of the present invention;

FIG. 4 is an explanatory view of the operation of the automatic bag opening device showing one embodiment of the present invention.

FIG. 5 is a schematic view of an additive introduction facility showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Material bag, 1a ... Opening opening, 10 ... First sandwiching plate, 11
... Second holding plate, 15 ... Lock plate, 17 ... Plummet, 18 ... Chain, 19 ... Protective plate, 20 ... Hook.

Claims (3)

(57) [Scope of request for utility model registration] A bag sealing portion for removably sandwiching an upper portion of an opening provided on a lower side of the bag, a bag sealing portion being held in a sandwiched state, and being moved upward by holding the bag sealing portion. An automatic bag opening device comprising: a lock mechanism for releasing a sandwiched state; and a weight connected to the lock mechanism via a loop-shaped member having a predetermined length. 2. The automatic bag opening device according to claim 1, further comprising a protection portion for protecting an operation area of the lock mechanism. 3. The automatic bag opening device according to claim 1, further comprising a hook that can be locked to the bag.