JPH09301695A - Lift apparatus for bag or the like filled with grain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lift apparatus capable of reducing a load in a lifting operation for bags filled with granular bodies and corn and in an operation for taking the bags out of a mounting plate and automatically ascending/ descending a lift bed. SOLUTION: A support frame body 11 and a mounting plate 12 separatively mounted on the support frame body 11 are swingingly attached to a U-shaped member 10 of a lift bed 3. The lift bed 3 mounting bags or the like thereon ascends until it is detected by a height sensor 17 preset to a desired height position. Also, the lift bed 3 can be automatically ascended and descended by a first limit switch 16 for detecting the motion of the mounting plate 12 approaching and parting from the support frame body 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when a heavy object such as a bag filled with powdery or granular material is piled up at a predetermined place or loaded on a transportation means, a heavy object such as a bag is specified. The present invention relates to an elevating device that can automatically elevate to the height of.

[0002]

2. Description of the Related Art Conventionally, grains sorted by a grain sorter are weighed and filled into bags using a weighing machine, and the weighed and filled bags are carried out from the weighing machine by human power of an operator. Various kinds of work such as bundling and stacking of bags are carried out.For that purpose, workers carry bags packed with cereals one by one to the waist height or shoulder and carry, stack, stack, etc. However, these lifting operations place a heavy burden on the operator.

Therefore, in order to reduce the burden of this kind of lifting work, a lifting device as shown in FIG. 6 has been devised.

The conventional lifting device E ₀ shown in FIG.
01 has an upright frame 102 and an upright frame 102 on which a bag filled with grains is placed.
2 is provided with an up-and-down table 103 that can move in the up-and-down direction, and a drive mechanism that is connected to a drive source and drives the up-and-down table 103 in the up-and-down direction. It is configured to be movable in the vertical direction by the operation of the drive source, which is connected to the drive mechanism described above. The bags filled with grains are placed on the placing portion 103a of the elevating table 103 to operate the drive source. By doing so, the placing part of the lifting platform can be moved to a predetermined height so that the bags can be easily handled, for example, a position corresponding to the waist of the worker or a position corresponding to the chest or shoulder. And a worker can take out the bags from the loading section 103a at that position and stack them on a pallet or load them on a transportation means. By using it There is no need to lift the force to a predetermined height, was to reduce stack of bags, the burden on the operator of the lifting operation in the loading or the like to the stacking and transportation means.

[0005]

However, in the conventional lifting device E ₀ , the mounting portion 103 of the lifting table 103 is used.
a is formed integrally with or fixed to the elevating table 103, and the mounting portion 103a always maintains a horizontal posture. Therefore, when the worker takes out and moves the bags from the placement unit 103a that has been raised to a predetermined height, the bags filled with grains are pulled out so as to rub on the placement unit 103a, or It was necessary to take out the bags while lifting them up so that they could float above the placing section. When the bags are pulled out by rubbing on the placing portion, a lateral force is applied to the elevating table 103 of the upright frame body 102, which may cause the entire elevating device E ₀ to be tilted or fall down. Since it is necessary to move the bags on the 103a so as to rub the bags, or to lift and move the bags so as to float upward from the placing part 103a, the operator's burden is not required when the lifting table is taken out from the placing part. The relief was not enough.

The present invention has been made in view of the problems of such a conventional lifting device, and it is a means for stacking or stacking heavy objects such as bags filled with powdery grains or cereals, or carrying means. It is possible to significantly reduce the work burden on the operator for lifting work such as loading on the floor and taking out bags from the placing part of the lifting table. It is an object of the present invention to provide an elevating device for bags and the like filled with grains, which is automatically operated in response to the placement and removal of the bags.

[0007]

In order to achieve the above object, a lifting device for bags or the like filled with grains according to the present invention comprises a base, an upright frame body erected on the base, and the upright frame. A lifting table provided so as to be movable up and down along a frame body, a lifting table driving mechanism arranged in the upright frame body for vertically driving the lifting table, and a grain provided with a driving source. In the lifting device for bags and the like, the lifting table includes a U-shaped member that is integrally connected to the lifting table drive mechanism, and the U-shaped member at a portion that is biased forward from the center point of the longitudinal length. A support frame body which is pivotally supported by a U-shaped member and which is always in contact with a stopper provided on the lower surface of the U-shaped member to maintain a horizontal state, and a support frame member which is in contact with the support frame member. A mounting plate that is detachably attached and that is spring-biased in a direction that separates from the support frame. The upright frame member so as to restrict the rise height of the lifting platform, is characterized in that the adjustably placed height sensor for detecting the lifting platform in the vertical direction.

In the lifting device for bags and the like filled with cereals according to the present invention, the placing plate approaches the supporting frame against the spring urging force between the supporting frame of the elevator and the placing plate. It is preferable to dispose the first limit switch so as to detect the movement, and to dispose the second limit switch on the base so as to come into contact with the lift table lowered to the lowest position.

[0009]

[Operation] A mounting plate on which bags and the like filled with cereals are mounted is attached to the support frame so as to be able to come into contact with and separate from the support frame through a spring,
Further, it is provided so as to be swingable with respect to the U-shaped member together with the support frame, and the bags and the like can be taken out from the mounting plate easily and quickly. Also, since the setting position of the height sensor that regulates the lifting height of the lifting platform can be adjusted in the vertical direction, the lifting height of the lifting platform can be set to a desired height position according to the work content of the operator. can do.

Further, by providing a first limit switch for detecting the movement of the placing plate when placing and taking out the bags on the placing plate of the raising and lowering stage, the raising and lowering stage is automatically raised and lowered. You can

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1, 2 and 3, an elevating device E of the present invention is capable of moving up and down along an upright frame body 2 provided upright at the center of the rear edge of a base 1. And an elevating table 3 arranged in the upright frame body 2 for moving the elevating table 3 in the vertical direction, and a drive motor 4. The upright frame body 2 has a rectangular cross section. The frame body is formed, and a guide rail 2a protruding inward is provided on a rear side wall of the frame body to extend in the longitudinal direction of the frame body, and a front side wall is connected to connect an elevating piece 6 and an elevating table 3 described later. A slit 2b extending in the longitudinal direction of the frame body for receiving the member 9 is provided.

The elevating table drive mechanism is arranged in the upright frame body 2, and is connected to the output shaft of a forward / reverse drive motor 4 arranged in an upper part of the upright frame body 2 through a coupling 6. The vertical screw 5 is supported by the upper and lower bearings 5a and 5b fixed to the upright frame 2, and the vertical moving piece 6 is provided with a female thread engaging with the vertical moving screw 5 at the center thereof. It The lifting piece 6 has a pair of roller shafts 7, 7 on its rear side.
The guide rollers 8, 8 are attached to the tip ends of the roller shafts 7, 7 so that the guide rails 2a of the upright frame body 2 can sandwich and rotate them. When the raising / lowering screw 5 is rotated in the normal direction or the reverse direction by the reverse rotation, the vertical movement piece 6 moves the guide rail 2 of the upright frame body 2.
It moves upward or downward while being guided by the guide rollers 8 that rotate while sandwiching a.

The elevating table 3 is connected to the elevating piece 6 via a connecting member 9 and is configured so as to move up and down together with the elevating piece 6, a plan view U-shaped member 10, a support frame 11, and a grain. It is composed of a mounting plate 12 on which the filled bags are mounted.
The U-shaped member 10 in plan view is provided with the connecting member 9 and the lifting piece 6
Is integrally fixed to the upright frame body 2, extends forward at a right angle to the upright frame body 2 and is always maintained in a horizontal posture, and swingably supports the support frame body 11 in the U-shaped space.

The support frame 11 has through holes 11 at its four corners.
are formed so as to be partly accommodated in the U-shaped space of the U-shaped member 11, and are located in front of the center point of the length of the support frame in the front-rear direction. 2 and 3, the length in the front-rear direction of the support frame 11 is L ₀ , and the support frame 1
1 of the front end portion of the distance to the pivot center when is L, the site defined by L <L _0/2, sets the swing shaft 15. Swing support shaft 1 attached to U-shaped member 10
5 is inserted into the through hole of the support frame 11 to support the support frame 11
Is attached to the U-shaped member 10 so as to be swingable about a swing support shaft 15. In addition, the swing support shaft 15 and the support frame 11
A torsion spring 21 is provided between the and to urge the support frame 11 in the clockwise direction in FIG. The lower surface of the U-shaped member 10 is provided with a stopper 10a that comes into contact with the lower surface of the support frame 11 to restrict the support frame 11 from rotating further in the clockwise direction from its horizontal posture. The frame 11 is held in a horizontal posture.

The placing plate 12 for placing bags and the like filled with grains is a substantially rectangular flat plate having a front side edge curved downward and a rear side edge upwardly bent. Are fixed to the supporting frames 11 at the positions corresponding to the through holes 11a, 11a .., which are provided at the four corners of the supporting frame 11, and the guide rods 13, 13 ,. The through-hole 11 of the support frame 11 by mounting 14, 14 ...
, and the retaining member is attached below the support frame 11. In this way, the mounting plate 12 is attached to the support frame body 11 so as to be able to come into contact with and separate from the support frame body 11, and is normally urged upward by the springs 14, 14 ... When a heavy object such as a bag is placed on the mounting plate 12, the mounting plate 12 is guided by the guide rod 13 and the through hole 11a against the urging force of the springs 14, 14 ,. As indicated by a broken line in b), it is configured to move downward so as to approach the support frame 11.

Therefore, the support frame 11 and the mounting plate 12
In the normal state, such as when the bags are not placed on the placing plate 12 or when the bags are placed in an even state as a whole, the rocking is performed. The weight of the support frame 11 and the mounting plate 12 based on the position of the support shaft 15 and the action of the torsion spring 21 are urged in the clockwise direction, but the end portion on the rear side is U-shaped. It abuts against a stopper 10a provided on the lower surface of the member 10 and is held in a horizontal posture. Then, when the bags placed on the mounting plate 12 are pulled out and moved forward, or when the front part of the mounting plate 12 is pushed down, a large force is applied to the front part of the lift table. The weight balance is lost, and the support frame 11 and the mounting plate 12 rotate about the swing support shaft 15 in the arrow direction (counterclockwise direction) shown in FIG. The plate 12 is in an inclined state, and the bags on the mounting plate 12 can be taken out along the inclination, and the mounting plate 12 and the bags are supported by the support frame 11 by the urging force of the spring 14.
By being pushed up from above, the worker can easily take out without requiring any special force.

Then, a first limit switch 16 is arranged on the upper surface of the support frame 11 so as to face the mounting plate 12.
The mounting plate 12 is supported by the springs 14, 14 ...
The bags are placed on the placing plate 12 from a state in which the bags are urged upward so as to be separated from the supporting frame body 1 against the urging force of the springs 14, 14 ,. When the first limit switch 16 is moved downward so as to approach 11, the first limit switch 16 is operated.

The height sensor 17 detects that the lifting table 3 has risen to reach a desired height and stops the lifting movement of the lifting table 3, and is formed by a photo sensor or a proximity switch. can do. The height sensor 17 is
It is housed in a sensor guide member 18 which is long and thin in the longitudinal direction and is arranged on the side wall of the upright frame body 2 so that the set height position can be adjusted vertically.
The sensor guide member 18 is formed of a frame having an opening 18a extending in the longitudinal direction on the front surface thereof and a set screw slit 18b extending in the longitudinal direction on the side surface thereof. Is arranged so as to face the opening 18a, and the tip of the set screw 19 inserted into the set screw slit 18b is screwed to the side portion of the height sensor 17, and by loosening the set screw 19, The height sensor 17 is movable in the vertical direction within the sensor guide member 18, can be moved to an arbitrary predetermined height, and the height sensor 17 can be fixed at that position by tightening the set screw 19. Has been done. The height sensor 17 has its sensor surface facing the lift table 3 to detect the lift table 3, and the height sensor 17 has a height facing a sensor surface of the lift table 3, for example, the rear surface of the U-shaped member 10. A detection piece 10b corresponding to the sensor is attached to a portion facing the sensor.

The height sensor 17 can be appropriately set to a height or the like corresponding to the position of the waist or the position of the chest or shoulders of the worker according to the work content of the worker. Then, after the position of the height sensor 17 is set, when the lifting table 3 is driven and moves upward, when the lifting table 3 reaches the setting position of the height sensor 17, the height sensor 17 detects the lifting table 3 and moves up and down. The drive of the drive motor 4 is stopped so as to stop the upward movement of the table 3.

A second limit switch 20 is provided on the base 1 so as to come into contact with an appropriate position on the lower surface of the lifting table 3, for example, the lower surface of the U-shaped member 10, so that the lifting table 3 is at the lowest position. It is configured to detect that it has been reached.

Next, the operation of the lifting device of the present invention constructed as above will be described.

The drive motor 4 is stopped in a state in which the lift table 3 is located at the lowest position. Elevating table 3 so that bags can be handled at the optimum height according to the work contents such as bags.
The height sensor 17 to a position corresponding to the height of the worker's waist, chest or shoulder,
Fix it. After that, when the bags are placed on the placing plate 12 of the lifting table 3, the placing plate 12 that has been urged upward by the spring 14 until then is attached to the spring 14 by the weight of the bags. It moves downward against the power and operates the first limit switch 16.

By the operation of the first limit switch 16,
The drive motor 4 is actuated to rotate the elevating screw 5, so that the elevating piece 6 screwed to the elevating screw 5 and the elevating table 3 integrally connected to the elevating piece 6 ascend. Then, the height sensor 17 set in advance
Detects the lift table 3 when the lift table 3 has risen to a set position. Based on this detection signal, the drive motor 4
Stops its rotation, and the lifting platform 3 also stops at the set position and is held. In this state, when the worker takes out the bags from the placing plate 12, the placing plate 12 and the support frame 11 are in an inclined posture in which the front portion is inclined downward from the horizontal posture according to the taking-out state. Since the spring 14 acts to push up the placing plate 12 and the bags at the time of taking out, the worker can take out the bags from the placing plate 12 smoothly with a comfortable posture.

When the worker removes the bags from the mounting plate 12 of the lifting table 3, the mounting plate 12 and the support frame 11 are
Due to the biased swing support shaft 15 and the torsion spring 21.
By this action, the stopper 10a provided on the lower end of the U-shaped member 10 rotates in the clockwise direction around the swing support shaft 15 as a center.
It contacts with and returns to the horizontal posture. At the same time, the mounting plate 12 is biased upward by the spring 14 so as to be separated from the support frame 11, and the first limit switch 16 is reversed. By reversing the first limit switch 16, the drive motor 4
Operates in the reverse rotation, and the lifting piece 6 and the lifting platform 3 start descending. Then, the lifting platform 3 descends until it comes into contact with the second limit switch 20 provided on the base 1, and the second limit switch 20 operates due to this contact, and the lifting platform 3
The drive motor 4 stops its reverse rotation in a state in which the drive motor 4 has reached its lowest position.

FIG. 5 illustrates an example of use of the lifting device of the present invention. A grain sorter 30, a weighing machine 40, a roller conveyor 50, and a lifting device E are arranged in this order and are sorted by the grain sorter 30. The grains thus obtained are weighed and filled into bags by the weighing machine 40.

The bags in which the grains are weighed and filled are transferred by the belt conveyor 41 of the weighing machine 40 which starts driving at the end of the weighing, and are transferred to the following roller conveyor 50.
On the roller conveyor 50, the bags are bound or closed at their openings and transferred to the lifting device E of the present invention.

As described above, the lifting device E can raise the bags to a preset height, take out the bags from the lift table at the raised position, and sequentially stack the bags on the pallet.

Further, when the grains are successively loaded into the hopper of the grain dryer from a plurality of filling bags stacked on the pallet, a lifting device having a height sensor installed at a position corresponding to the height of the loading hopper is used. As a result, the worker can raise the bag without the need for lifting work, and it is also possible to stick grains at the raised position.

As described above, by using the elevating device of the present invention in association with other equipment, the elevating height of the elevating table can be appropriately set to an arbitrary height. The bag can be set according to the position where it is easy to handle or the height of stacking, etc., and the operator does not have to manually move the bag up, and the bag can be taken out and stacked in a more comfortable position. It becomes possible to perform work and the like.

[0030]

As described above, the lifting device of the present invention is capable of automatically lifting a heavy object such as bags filled with powder or grains to a predetermined height.
It is possible to reduce the burden of lifting work for a worker who carries out the work of lifting the bags and to make the mounting plate on which the bags are mounted tiltable and separate from the support frame. By being biased by the spring, even when the worker takes out the bags from the placing plate, the worker can easily and quickly take out the bags along the placing plate that tilts in a comfortable posture. Therefore, the work load on the worker can be further reduced.

Further, in the lifting device of the present invention, the height sensor can be adjusted in the vertical direction so that the lifting height of the lifting table is appropriately set to a position where the bags can be easily handled according to the work content of the operator. In addition, in the elevating table, by arranging the limit switch between the support frame body and the mounting plate, the limit switch operates by only mounting the bags on the mounting plate, Lifting of the platform will automatically start,
Further, when the worker takes out the bags from the placing plate in the raised position, the lifting table is automatically lowered by the operation of the limit switch, and is returned to the lowermost position. The lifting device operates automatically without requiring the operator to perform a special switch operation, and is a lifting device useful for the worker.

[Brief description of drawings]

FIG. 1 is a front view schematically showing a lifting device of the present invention.

FIG. 2 is a side view showing the lifting device of the present invention partially broken away.

3 (a) is a cross-sectional view taken along the line AA in FIG. 2, and FIG. 3 (b) is an enlarged view of a part of FIG. 3 (a). FIG.

FIG. 4 is a partially broken side view similar to FIG. 2, showing a swinging state of the mounting plate.

FIG. 5 is a drawing schematically showing a usage example of the lifting device of the present invention.

FIG. 6 is a side view schematically showing a conventional lifting device.

[Explanation of symbols]

 E Lifting device 1 Base 2 Upright frame 3 Lifting platform 5 Lifting screw 6 Lifting piece 10 U-shaped member 11 Support frame 12 Mounting plate 15 Swing support shaft 16 First limit switch 17 Height sensor 18 Sensor guide Material 20 Second limit switch

Claims (4)

[Claims] 1. A base (1), an upright frame (2) standing upright on the base (1), and an elevating stand provided so as to be vertically movable along the upright frame (2). (3) and the upright frame (2)
An elevator device (5, 6) for driving the elevator (3) in the up-and-down direction, and an elevator device such as bags filled with grains, which is provided with a drive source (4). The elevating table (3) has a U-shaped member (10) integrally connected to the elevating table driving mechanism, and the U-shaped member at a portion biased forward from the center point of the longitudinal length. A supporting frame body (11) that is pivotally supported by a member (10) and that is always in contact with a stopper provided on the lower surface of the U-shaped member to maintain a horizontal state, and the supporting frame body (11). Frame (1
1) and a mounting plate (12) that is attached to and detachable from the support frame body (11) and is biased by a spring in a direction of separating from the support frame body (11). Bags filled with cereals, characterized in that a height sensor (17) for detecting the lifting platform (3) is installed so as to be adjustable in the vertical direction so as to regulate the lifting height of the lifting platform (3). Lifting device for etc. 2. The mounting plate (12) is mounted on the support frame (11) between the supporting frame (11) and the mounting plate (12) of the lift table (3) against the spring biasing force. The lifting device for bags and the like filled with grains according to claim 1, wherein a first limit switch (16) is provided so as to detect that the bag has moved closer to it. 3. The base (1) is provided with a second limit switch (20) which comes into contact with the lifting table (3) lowered to the lowest position, according to claim 1 or 2. Lifting device for bags filled with grains. 4. An elevating table drive mechanism has an elevating screw (5) rotatably supported in an upright frame (2) and a female thread engaging with the elevating screw (5). And a lifting piece (6) that moves in the vertical direction by the rotation of the lifting screw (5), and the U-shaped member (10) of the lifting platform (3) is integrated with the lifting piece (6). The lifting device for bags and the like filled with grains according to any one of claims 1 to 3, which are connected.