JPH11171290A - Container bag and forklift for lifting the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a string on a container bag side to be easily and reliably hooked on a hook of a forklift without an assistant worker and also to allow contents to be easily put in and out of a container bag without removing the string. SOLUTION: A plurality of strings 12,13 having an arc shape are provided on a bag upper face 10a, wherein the strings include a magnetic body 14 and a magnet 15 at the center of the arc shape. At the time of putting contents in/out of a bag 10, the plurality of strings 12, 13 are separated farther from each other whereby the contents can be easily put in/out. In addition, at the time of hanging up the bag, attracting sites of the magnetic body 14 and the magnet 15 are attracted by a magnetically attracting means on a forklift side and the strings can be hooked on a hook on the forklift side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to cereals such as rice and wheat,
The present invention relates to a container bag for storing foods such as sugar, feed, fertilizer, and the like, and a forklift suitable for lifting the container bag.

[0002]

2. Description of the Related Art Conventionally, a container bag of this type usually weighs about 500 to 1000 kg, and a forklift is used to transport the container bag. In this case, it is necessary to hook the string portion of the container bag on the fork of the forklift, but the string portion of the container bag is flexible and falls down in close contact with the upper surface of the container bag. It is not possible to hook the string portion of the container bag on the fork of the forklift only by moving the container bag. Therefore, there is a problem that a dedicated auxiliary operator is required separately from the driver of the forklift for hooking the string portion.

In order to solve such a problem, Japanese Patent Laid-Open Publication No. Sho 58-2199 discloses that a magnet attraction portion made of a wire or an iron plate is provided on a cord portion of a container bag, while a magnet attraction portion is provided above a fork of a forklift. Along with disposing an arm protruding longer than the fork, a magnet piece is suspended from a tip of this arm by a swingable member such as a string,
There has been proposed an apparatus in which the magnet piece attracts a magnet attraction portion of a string portion on the container bag side and is lifted, and the string portion thus lifted is hooked on a fork by advancing a forklift.

[0004]

However, in the prior art disclosed in the above publication, a plurality of containers (for example,
In this state, when the cord portion is attached to the container bag, the coupling portion of the cord portion and the magnet attraction portion are in the central portion of the upper surface of the container bag. Will be located. For this reason, there is a problem in that the cord portion hinders the operation of taking in and out the stored items when the stored items are taken in and out of the container bag.

[0005] For this reason, it is necessary to attach / detach the cord portion to / from the container bag every time a storage object is put in / out of the container bag. However, attaching / detaching the cord portion is troublesome and deteriorates workability. Further, in the above-described conventional technology, the string portion attracted and lifted by the magnet pieces needs to be hooked on the fork by advancing the forklift itself, so that the position of the forklift must be finely adjusted in the vicinity of the container bag. .

[0006] The present invention has been made in view of the above points,
The string part on the container bag side can be easily and securely hooked to the hook of a forklift without any auxiliary workers, and the storage items can be easily taken in and out of the container bag without removing and attaching the string part. The purpose is to be able to. In addition, the present invention provides that in the operation of hooking the string portion on the container bag side to the hook of the forklift, it is possible to easily perform the hooking operation of the string portion without requiring fine adjustment of the forklift position. Aim.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a bag upper surface portion (10a) is provided.
An opening / closing opening (11) which is provided at the
A plurality of strings (12, 13) are provided on the bag upper surface (10a) so as to hold and fix both ends of the arc shape, and the plurality of strings (12, 13) have an arc shape. A magnetic coupling means (14, 15) arranged at the center is provided, and the arc-shaped central part of the plurality of cords (12, 13) can be attracted and detached by the magnetic coupling means (14, 15). It features a container bag that is

According to this, when opening and closing the opening / closing opening (11) of the bag upper surface portion (10a) and putting in / out the stored items,
The center part of the arc shape of the plurality of strings (12, 13) on the bag upper surface part (10a) is detached by the magnetic coupling means (14, 15) to separate the plurality of strings (12, 13) from each other. it can. For this reason, there is no hindrance to the work for taking in and out the stored items.

In addition, when the container bag is lifted, a plurality of strings (12, 13) on the bag upper surface (10a) are used.
The central portion of the arc shape of the forklift is integrally attracted by the magnetic coupling means (14, 15), so that the magnetic coupling means (14, 1) is provided by the magnetic attraction means (28) on the forklift side.
The portion of 5) can be magnetically attracted and hooked on the hook (23) on the forklift side, so that the container bag can be lifted without an auxiliary worker.

[0010] As described in the second aspect of the present invention, the magnetic coupling means specifically includes a magnetic member (14) provided on one of the plurality of strings (12, 13) and the plurality of strings (12, 13). 13) and a magnet (15) provided on the other side. According to the third aspect of the present invention, the hook (23) that can be moved up and down and the strings (12, 1, 1) of the container bag (10) are provided.
(3) magnetic attraction means (28) for magnetically attracting the magnetically attracted portions (14, 15), and moving the magnetic attraction means (28) from a position below the hook (23) by a predetermined amount above the hook (23). After that, a forklift for lifting a container bag is provided which has an operation mechanism (24, 25, 26, 27) for horizontally moving the magnetic attraction means (28) to a predetermined hook portion of the hook (23). .

According to this, the magnetic attraction means (28) provided on the forklift side is moved upward and thereafter in the horizontal direction, so that the magnetic attraction means (28) can be moved without moving the forklift itself. The magnetically attracted portions (14, 15) of the strings (12, 13) of the container bag (10) adsorbed to the container bag (28) can be hooked on predetermined portions of the hook (23). Therefore, the container bag (10) can be lifted only by moving the magnetic attraction means (28) by the operating mechanism (24, 25, 26, 27) with the forklift stopped, and the container bag (10) can be lifted. 10) The efficiency of the lifting operation can be further improved.

The magnetically attracted portions of the strings (12, 13) are specifically a magnetic body portion (14) according to claim 2.
And a magnet (15). Further, as in the invention according to claim 4, the operating mechanism includes a magnetic attraction means (2).
8) and a wire (26) for suspending the wire (2).
6) a wire vertical movement mechanism (241) for vertically moving the wire, and a wire horizontal movement mechanism (240, 25) for horizontally moving the wire (26).

[0013] More specifically, the wire vertical movement mechanism can be constituted by using a hydraulic cylinder mechanism (241) illustrated in FIG. Similarly, the wire horizontal movement mechanism can be more specifically configured using the hydraulic cylinder mechanism (240) and the arm (25) illustrated in FIG. Further, as in the invention according to claim 5, the magnetic attraction means is provided with a hook (2).
When the electromagnet (2) moves in the horizontal direction to the predetermined hooked portion in (3), the current is cut off and the magnetic attraction force disappears.
According to the configuration (8), the magnetically attracted portions (14, 15) of the cords (12, 13) of the container bag (10) can be securely hooked at a predetermined portion of the hook (23).

The reference numerals in parentheses of the above-mentioned means indicate the correspondence with the concrete means described in the embodiments described later.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a container bag 10 used in the present embodiment.
0 is a flexible material which is formed into a substantially cylindrical shape with a resin such as polypropylene or vinyl chloride, and generally stores 500 to 1000 kg of stored things such as grains such as rice and wheat, foods such as sugar, feed, and fertilizers. It is about the size that can be stored.

The upper surface 10a of the container bag 10 is provided with a circular opening / closing opening 11 for taking in and out the above-mentioned storage items, and the opening / closing opening 11 is integrally formed with a plurality of components extending from the upper surface 10a. The split piece 10b can be closed by binding with appropriate means, for example, a resin string 11a, and the opening / closing opening 11 can be opened by loosening the binding of the resin string 11a. I have.

A plurality (two in the illustrated example) of strings (ropes) 12 and 13 made of a high-strength resin material or the like are integrally connected to the container bag 10.
Reference numerals 2 and 13 extend to the bottom of the container bag 10 also to reinforce the container bag 10. And two strings 1
2 and 13 are upper surface portions 10a of the container bag 10, respectively.
In this configuration, both ends of the arc shape are held and fixed to the container bag 10 side so as to be hooked on a forklift hook described later. Here, the strings 12, 1
The lengths of the three arc shapes are set such that the central portions of the arc shapes have a length that allows polymerization with a predetermined slack.

One of the two strings 12, 13
A magnetic body portion 14 made of an iron piece is integrally joined to the arc-shaped top portion. Since the magnet 15 is integrally connected to the center of the other string 13 in the arc shape, the two strings 1
When the central portions of the two arcs 2 and 13 are overlapped, FIG.
As shown in (b), the magnetic body portion 14 and the magnet 15 are attracted to each other, so that the central portions of the two strings 12, 13 can be integrally connected. FIG. 1A shows two strings 12, 1
3 shows a state where it is separated.

FIG. 2 shows a forklift 20 according to the present embodiment. The forklift 20 is a vehicle that runs using an engine (internal combustion engine) 21 as a power source.
A hydraulic pump 22 driven by the engine 21 is provided, and a hook 23 that moves up and down in the direction of arrow A by a hydraulic mechanism using the hydraulic pump 22 as a power source is provided. The tip of the hook 23 is provided with the container bag 1 described above.
Hooks 23a for securely hooking the zero strings 12, 13
Is provided.

A forward / backward movement mechanism 24 is disposed on the upper surface of the hook 23. The forward and backward mechanism 24 includes
The arm 2 uses the hydraulic pressure of the hydraulic pump 22 as a power source.
5, a first hydraulic cylinder mechanism 240 (see FIG. 3) for moving forward and backward in the direction of arrow B (horizontal direction) shown in FIG.
There is provided a second hydraulic cylinder mechanism 241 (see FIG. 3) for vertically moving the hydraulic cylinder.

The wire 26 is guided by a pulley 27 rotatably provided at the distal end of the arm 25. An electromagnet 28 is integrally connected to the suspended distal end of the wire 26. The wire 26 and the electromagnet 28 move up and down integrally. FIG. 3 shows a hydraulic circuit and an electric circuit according to the present embodiment. The hydraulic pump 22 is provided in parallel with a relief valve 22a that opens when the discharge side pressure rises to a predetermined value. The first hydraulic cylinder mechanism 240 and the second hydraulic cylinder mechanism 241 have the same configuration. The pistons 240b and 241b are reciprocally housed in the cylinders 240a and 241a, and the hydraulic chamber 240c is provided at one end of the pistons 240b and 241b. 241
c and a spring chamber 240 at the other end.
d, 241d.

The spring chambers 240d and 241d are:
It is opened to the atmosphere by the atmosphere opening ports 240e and 241e,
The coil-shaped return springs 240f and 241f are housed therein. Arm 25 is attached to one piston 240b.
Is connected to the other piston 241b.
The wire 28 is connected via g. This wire 2
The energization of the electromagnet 28 connected to the suspension tip of the suspension 8 is interrupted by a switch 29 that is opened and closed in conjunction with the forward and backward movement of the arm 25.

The hydraulic chambers 240c and 241c are connected to the discharge side of the hydraulic pump 22 via three-way switching electromagnetic valves 30 and 31, and the pressure in the hydraulic chambers 240c and 241c is reduced by the passage switching action of the electromagnetic valves 30 and 31. Can be adjusted. The three-way switching solenoid valves 30, 31 are respectively provided with electromagnetic coils 30a, 31
a, a valve element (not shown) whose position is controlled by the attraction force of the electromagnetic coils 30a, 31a, input ports 30b, 31b connected to the discharge side of the hydraulic pump 22, and hydraulic chambers 240c, 241c. Output ports 30c, 3
1c, a return port 30d connected to the oil tank 32,
31d.

The three-way switching solenoid valves 33, 34
31 is a switch that interrupts the energization of the forklift 2
0 so that you can operate it while sitting in the driver's seat,
The switches 33 and 34 are arranged at positions near the driver's seat. Reference numeral 35 denotes a key switch for operating the engine 21 of the forklift 20, and reference numeral 36 denotes a power supply battery mounted on the forklift 20.

Next, the lifting operation of the container bag 10 in this embodiment will be described.
Is turned off, the energization to the three-way switching solenoid valves 30 and 31 is interrupted.
0 and 31, the built-in valve is connected to the output port 30.
c and 31c are connected to return ports 30d and 31d. Therefore, the first hydraulic cylinder mechanism 240 and the second hydraulic cylinder mechanism 240
In the hydraulic cylinder mechanism 241, the hydraulic chamber 240c,
241c is connected to the oil tank 32, and the discharge pressure of the hydraulic pump 22 does not act on the hydraulic chambers 240c and 241c.

As a result, the pistons 240b and 241b advance toward the hydraulic chambers 240c and 241c by the spring force of the return springs 240f and 241f, respectively, and the arm 25 and the wire 28 are in the state of FIG. At this time, the switch 29 is moved with the advance of the arm 25.
Is closed, the electromagnet 2 at the hanging tip of the wire 28 is closed.
8 is energized and in operation.

Then, the forklift 20 is made to approach the container bag 10 from the state of FIG. 2 as shown in FIG. Here, the string parts 12, 13 of the container bag 10
Is in a state shown in FIG. 1B, that is, in a state where the magnetic body portion 14 and the magnet 15 are attracted to each other, so that when the electromagnet 28 moves to the center of the container bag 10, the electromagnet 28 Of the cord portions 12 and 13 (the portion of the magnetic body portion 14 and the magnet 15) is attracted.

Next, when the switch 34 is turned on, the electromagnetic coil 31a of the three-way switching electromagnetic valve 31 is energized, whereby the built-in valve body (not shown) is displaced to output the output port 31c.
Is connected to the input port 31b, the discharge pressure of the hydraulic pump 22 acts on the hydraulic chamber 241c. As a result, the piston 241b retreats against the spring force of the return spring 241f, and accordingly, the wire 28 rises and lifts the electromagnet 28 to a position above the hook 23. FIG.
This state is shown in FIG.

Next, when the switch 33 is turned on, the electromagnetic coil 30a of the three-way switching electromagnetic valve 30 is energized, whereby the built-in valve body (not shown) is displaced to output the output port 30c.
Is connected to the input port 30b, so that the discharge pressure of the hydraulic pump 22 acts on the hydraulic chamber 240c. As a result, the piston 240b retreats against the spring force of the return spring 241f, and accordingly, the arm 25 retreats, and the electromagnet 28 moves to a position above the hook 23a at the tip of the hook 23. FIG. 6 shows this state.

Here, the movement of the electromagnet 28 to a position above the hook 23a is performed within the range of the slack of the cord portions 12 and 13, so that an excessive load due to the weight of the container bag 10 is applied to the electromagnet 28. It does not work. When the electromagnet 28 moves to a position above the hook 23a, the switch 29 is opened in conjunction with the retreat of the arm 25, so that the power supply to the electromagnet 28 is cut off. As a result, the attractive force of the electromagnet 28 is eliminated, so that the joint portion (the portion of the magnetic body portion 14 and the magnet 15) of the string portions 12 and 13 separates from the electromagnet 28 and falls on the hook portion 23a. FIG. 7 shows this state.

Next, the entire hook 23 is connected to the forklift 2
0 using the hydraulic mechanism of the container bag 1
0 can be lifted by the hook 23 and transported. (Other Embodiments) In the above embodiment, the electromagnet 28
Is used to adsorb the connecting portion (the portion of the magnetic body portion 14 and the magnet 15) of the string portions 12 and 13 and lift it.
Using a magnet (permanent magnet) instead of
The connecting portion of No. 3 may be sucked and lifted.

That is, as shown in FIG. 6, when the magnet on the wire 26 (the magnet used in place of the electromagnet 28) moves to a position above the hook 23a at the tip of the hook 23, the slack of the string 13 is reduced. Instead, the magnet on the wire 26 side may be forcibly separated from the joint of the cord portions 12 and 13 by a force in the retreating direction of the arm 25 (a hydraulic force applied to the piston 240b).

[Brief description of the drawings]

FIG. 1 is a perspective view of a container bag according to an embodiment of the present invention.

FIG. 2 is a side view of the forklift according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram of an electric circuit and a hydraulic circuit of the forklift according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram of a container bag lifting operation according to an embodiment of the present invention.

FIG. 5 is an explanatory diagram of a container bag lifting operation according to an embodiment of the present invention.

FIG. 6 is an explanatory diagram of a container bag lifting operation according to an embodiment of the present invention.

FIG. 7 is an explanatory diagram of a container bag lifting operation according to an embodiment of the present invention.

[Explanation of symbols]

10: container bag, 10a: bag upper surface, 11 ...
Opening / closing opening, 12, 13 ... string, 14 ... magnetic part, 15 ... magnet, 23 ... hook, 24 ... forward and backward mechanism, 25 ... arm, 26 ... wire, 27 ... pulley, 28 ... electromagnet (magnetic attraction means), 240, 241, hydraulic cylinder mechanism.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B66F 9/19 B66F 9/19 A

Claims (5)

[Claims] 1. An opening / closing opening (11) provided on a bag upper surface portion (10a) for taking in and out of stored items, and arc-shaped both ends provided on the bag upper surface portion (10a) so as to be held and fixed. Multiple strings (12, 13)
The plurality of cords (12, 13) are provided with magnetic coupling means (14, 15) arranged at the center of the arc shape, and are provided by the magnetic coupling means (14, 15). A container bag, characterized in that the arc-shaped central portions of the plurality of cords (12, 13) are adsorbable and detachable. 2. The method according to claim 1, wherein the magnetic coupling unit includes the plurality of strings.
2, 13) and a magnet (1) provided on the other of the plurality of strings (12, 13).
5) The container bag according to claim 1, comprising: 3. A magnetically attracting means (2) for magnetically attracting a vertically movable hook (23) and a magnetically attracted portion (14, 15) of a string (12, 13) of a container bag (10).
8) and after moving the magnetic attraction means (28) from a position below the hook (23) by a predetermined amount above the hook (23), the magnetic attraction means (28) is moved to the hook (23).
A forklift for lifting a container bag, comprising: an operating mechanism (24, 25, 26, 27) for moving the container bag horizontally to a predetermined hooking position. 4. The operating mechanism comprises a magnetic attraction means (28).
(26), a wire vertical movement mechanism (241) for vertically moving the wire (26), and a wire horizontal movement mechanism (240, 25) for horizontally moving the wire (26). The forklift for lifting a container bag according to claim 3, wherein the forklift lifts the container bag. 5. The method according to claim 1, wherein the magnetic attraction means includes the hook (2).
When the electromagnet (2) moves in the horizontal direction to the predetermined hooked portion in (3), the current is cut off and the magnetic attraction force disappears.
8. The forklift for lifting a container bag according to claim 3, wherein the forklift comprises: