JP3934926B2 - Bellows type air lifter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bellows type air lifter, and more particularly to a bellows type air lifter for lifting, for example, a cylindrical lifted object with a pair of bellows bag bodies.
[0002]
[Prior art]
Conventionally, for example, a predetermined printing operation may be performed while chucking both ends of a core of a paper roll, which is a roll of printed material being conveyed, and then feeding out the paper from the roll.
[0003]
In such a series of operations, the center height at which chucking is possible is set to a constant height according to the diameter of the general-purpose paper roll. For example, if the diameter of the general-purpose paper roll is φ1000 mm, the center height at which chucking is possible is set to half that of 500 mm. In addition, the chuck mechanism itself is generally designed so as to allow some fluctuations in the roll diameter, so that it can cover up to some extent when the diameter of the paper roll being conveyed changes slightly. It has a mechanism.
[0004]
However, in very rare cases, a very small-diameter roll provided with the remaining paper that has not been used up, for example, a paper roll having a diameter of about 350 mm may be used. In such a case, it cannot be automatically chucked. Therefore, in such a case, it is necessary to lift the paper roll to a position where chucking is possible by two operators.
[0005]
However, it can be said that it is extremely inefficient to always have two operators waiting for such a rare case. It is desirable to have an operator staffing of at least one person so that the entire process can be overlooked. It is also uneconomical to separately manufacture a large and expensive device assuming such a rare case.
[0006]
[Problems to be solved by the invention]
The present invention has been devised based on such a situation, and the purpose thereof is a simple mechanism that is excellent in operability, that does not take up space when stored, is compact, and that a stable long stroke can be obtained. The object is to provide a bellows type air lifter.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention has a pair of bellows bag bodies which are arranged substantially opposite to each other with a certain interval therebetween, and air is introduced into the bellows bag bodies, thereby substantially making a pair of bellows bag bodies. A bellows type air lifter for lifting an object to be lifted placed on the upper part of the bellows, wherein the pair of bellows bag bodies are formed by connecting a plurality of individual bags and expanding upward as air is introduced. The pair of bellows bag bodies are connected by a pair of connecting cords crossed to each other at the upper portion thereof, and the pair of connecting cords are used to lift the lifted object. As the pair of bellows bag bodies expands upward with the introduction, the pair of bellows bag bodies are formed so as to be pulled to the inside which is the opposite surface.
[0008]
As a preferred aspect of the present invention, the pair of connecting strings passed in a cross shape are respectively disposed in the vicinity of both end portions of the bellows bag body in a direction along a predetermined arrangement interval of the pair of bellows bag bodies. One end of the pair of connecting cords passed in a shape is connected to the uppermost individual bag of the bellows bag body arranged opposite to each other, and the other end of the pair of connecting cords passed in a cross shape is respectively It is comprised so that it may be connected to the individual bag located below the uppermost part of the bellows bag body arrange | positioned facing.
[0009]
As a preferred embodiment of the present invention, the plurality of individual bags constituting the bellows bag body are configured to be connected in a range of 2 to 6 pieces.
[0010]
As a preferred embodiment of the present invention, an air introduction member is connected to each of the bellows bag bodies at the lowermost part of the pair of bellows bag bodies in order to enable simultaneous air supply to both bellows bag bodies. Configured.
[0011]
As a preferred aspect of the present invention, the pair of bellows bag bodies are configured such that lower portions thereof are fixed to the movable support and can be carried together with the movable support.
[0012]
As a preferred aspect of the present invention, the pair of bellows bag bodies are configured such that lower portions thereof are fixed to the movable support body so as to be inclined inwardly of the interval arranged opposite to each other.
[0013]
As a preferred embodiment of the present invention, the pair of bellows bag bodies is configured such that a fixing sheet for fixing the bag body is formed in the lower part thereof.
[0014]
As a preferred aspect of the present invention, the object to be lifted is placed in a direction in which the central axis direction is along a predetermined arrangement interval of the pair of bellows bags.
[0015]
As a preferred aspect of the present invention, the vertical load of the lifted object is configured to exist at a substantial center position of the pair of bellows bags.
[0016]
As a preferred embodiment of the present invention, the upper planar shape of the bellows bag is configured to be a substantially rectangular shape.
[0017]
As a preferred aspect of the present invention, the capacity of the bag body located at the lowermost part of the pair of bellows bag bodies is configured to be set larger than the capacity of the bag body located at the uppermost part.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2A and 2B.
[0019]
FIG. 1 is a schematic front view mainly showing the bellows type air lifter of the present invention (in a lifted state), and FIG. 2 (a) shows a pair of bellows bags before air introduction (before lift) mainly from above. FIG. 2B is a schematic plan view seen, and FIG. 2B is a schematic cross-sectional view taken along the line AA in FIG.
[0020]
As shown in FIG. 1, the bellows type air lifter 1 according to the present invention has a pair of bellows bag bodies 20, 30 facing each other with a predetermined interval L, and air in the pair of bellows bag bodies 20, 30. Is used to lift the object to be lifted 60 placed substantially on the upper part of the pair of bellows bag bodies 20, 30. The reason “substantially” is that a pair of connecting strings 7 and 8 passed in a cross shape, which will be described later, may also correspond to the placement portion. In addition, the to-be-lifted object 60 drawn with the dashed-two dotted line in FIG. 1 exists in the mounted state before lifting.
[0021]
Note that the large-diameter lifted object 80 drawn by a two-dot chain line virtually depicts a so-called general-purpose lifted object, and the center position thereof coincides with the chuck fixing center position P. In particular, it is not necessary to perform a lift operation for centering using the bellows type air lifter of the present invention.
[0022]
As shown in FIG. 1, the pair of bellows bag bodies 20 and 30 according to the present invention are connected to a plurality of individual bags 21, 22, 23, 24 and 31, 32, 33, 34 together with the introduction of air. It is formed so as to expand upward.
[0023]
The case where the number of individual bags constituting each of the bellows bag bodies 20 and 30 is four (four stages) is exemplified, but the present invention is not limited to this. It is desirable to design so as to be connected within a range of (constituting stages), particularly preferably 3 to 5 (constituting 3 to 5 stages). If it exceeds six steps, the bellows bag body may buckle during lift. Moreover, if it is less than two stages, a tendency that the lift amount becomes insufficient occurs. In addition, one individual bag (for example, symbol 22) is shared in the case of forming a so-called bellows bag body and one trough portion 22a and two trough portions 22b and 22c located at both ends (if there are adjacent individual bags). Is forming).
[0024]
In the present invention, the pair of bellows bag bodies 20 and 30 are connected by a pair of connecting cords 7 and 8 that are crossed to each other in the upper part (first and second stages from the top in FIG. 1). ing. The pair of connecting cords 7 and 8 passed in a cross shape is an inner side in which the pair of bellows bag bodies 20 and 30 that are introduced and expanded upward to lift the lifted object 60 are opposed to each other. It is formed so that it can be pulled. That is, in FIG. 1, as the pair of bellows bag bodies 20, 30 expands upward, the pair of bellows bag bodies 20, 30 are formed by the action of the pair of connecting strings 7, 8 passed in a cross shape. As shown by the curve (α) and the curve (β) drawn by their centers, they curve inward from each other. Accordingly, the wobbling of the bellows bag bodies 20 and 30 during the lifting and after the lifting hardly occurs, and the lifted object 60 can be lifted stably.
[0025]
The pair of connecting strings 7, 8 passed in a cross shape will be described in more detail. As shown in FIG. 2 (a), the pair of connecting strings 7 and 8 passed in a cross shape are arranged in a direction (arrow (γ) direction) along a predetermined arrangement interval of the pair of bellows bag bodies 20 and 30. ) In the vicinity of both ends of the bellows bag body (a pair of connecting strings 7 and 8 are two sets at both ends). The arrangement takes into account the balance of force. Note that the pair of connecting strings 7 and 8 may be provided not only at both ends of FIG.
[0026]
As shown in FIG. 1 and FIG. 2 (a), one ends 7a, 8a of the pair of connecting strings 7, 8 passed in a cross shape are the individual bags 24 at the uppermost portion of the bellows bag body disposed opposite to each other. 34, and the other ends 7b and 8b of the pair of connecting cords passed in a cross shape are individual bags positioned below the uppermost part of the bellows bag body arranged opposite to each other (the embodiment shown in the drawings). In the form, the individual bags 23 and 33 in the second stage from the top are connected to the third stage from the top depending on the design specifications).
[0027]
As described above, the connection strings 7 and 8 arranged in a cross manner as described above enable a stable lift without wobbling.
[0028]
Further, if necessary, in addition to the pair of connecting cords 7 and 8 passed in a cross shape, for example, the individual bags 32 and 22 located thereunder are connected at the same height with other connecting cords. It is also a design item that should be considered. The addition of such other connecting strings may be particularly effective particularly when the number of steps of the bellows bag body is increased (for example, when the number of steps is 4 to 6).
[0029]
Further, in the present invention, air is introduced into the bag bodies 21 and 31 positioned at the lowermost part of the pair of bellows bag bodies 20 and 30 in order to enable simultaneous air supply to both the bellows bag bodies 20 and 30. The member 3 (refer FIG. 2A) is connected. With such a specification, the pair of bellows bag bodies 20 and 30 are expanded in a balanced manner with the introduction of air, and there is almost no wobbling or the like during and after the lift operation.
[0030]
In the present invention, the pair of bellows bag bodies 20, 30 is formed with fixing sheets 29, 39 (for example, FIG. 1) for fixing the bag body at the lower portion thereof, and the pair of bellows bag bodies 20, 30 is formed. It is also possible to carry a lift work after fixing the fixing sheet at a predetermined work position when actually carrying it alone and actually using it.
[0031]
Separately from this embodiment, the lower portions of the pair of bellows bag bodies 20 and 30 are fixed to a movable support body such as a plate that can be transported in advance, and the bag body can be carried together with the movable support body. It is also a preferable aspect that the mobile support is immediately installed to perform the work. In the embodiment in which the pair of bellows bag bodies 20 and 30 are fixed in advance to the movable support body, as shown in FIG. 1, the pair of bellows bag bodies 20 and 30 are inclined to the inside of the interval in which they are arranged to face each other. It is preferable that the lower part is fixed to a movable support body having a predetermined inclined part S. In this case, it is possible to prevent the mounted cylindrical lifted portion 60 from rolling out from the center position, and it is possible to reliably realize a stable lift operation.
[0032]
As can be seen from the above description, the lifted object 60, which is the lift object of the present invention, has a longitudinal direction (a central axis direction) in a direction along a constant arrangement interval between the pair of bellows bag bodies 20 and 30. It is mounted in a state that substantially coincides with the direction of arrow (γ) in FIG. Accordingly, the vertical load of the lifted object 60 exists at the substantial center position of the pair of bellows bag bodies 20 and 30 (line H which is the center line in FIG. 1).
[0033]
Further, as shown in FIG. 2A, it is preferable that the upper planar shape of the bellows bag bodies 20 and 30 is generally configured to be a substantially rectangular shape. This is to stably lift the long cylindrical lifted body 60.
[0034]
Moreover, as shown in FIG. 2B, the folded height of the bellows bag bodies 20 and 30 in a state where the air in the bellows bag bodies 20 and 30 is removed is about 20 to 50 mm (lift (When the height is 300 to 500 mm). Therefore, the storage space is extremely small, and the size is convenient for carrying.
[0035]
As another aspect of the present invention, the capacities of the bag bodies 21 and 31 positioned at the lowermost part of the pair of bellows bag bodies 20 and 30 are set larger than the capacities of the bag bodies 24 and 34 positioned at the uppermost part, respectively. It is also a preferred embodiment. In this case, the capacity of the bag body can be reduced gradually as it goes up from the lowermost bag body.
[0036]
In the present invention, the pair of bellows bag bodies 20 and 30 are required to be made of a material that is airtight and does not substantially stretch. What is necessary is just to process the flexible laminated | multilayer film (sheet | seat) which coat | covered the both surfaces of the base material with the rubber material in the shape of a single bag, connect these, process into a predetermined bellows shape, and use.
[0037]
The material of the pair of connecting strings 7 and 8 passed in a cross shape is not particularly limited as long as it has a predetermined tensile strength, but considering the adhesiveness with the bellows bag bodies 20 and 30, It is also a preferred aspect to use the same material as the laminated film constituting the bellows bag.
[0038]
In the specific design of the bellows type air lifter according to the present invention, the size of the individual bag and the introduced air pressure may be set in consideration of the load of the lifted object 60.
[0039]
The operation of the bellows type air lifter described above will be briefly described below. First, an object to be lifted 60 (for example, a cylindrical wound product) is placed in the approximate center between the pair of bellows bag bodies 20 and 30 in a folded state before air introduction. In this case, the pair of connecting strings 7 and 8 passed in a cross shape are in a state of being laid on the lifted object 60.
[0040]
Next, when air is introduced from the lowermost bag body of the pair of bellows bag bodies 20, 30, the bellows bag bodies 20, 30 gradually inflate and lift the lifted object 60. At this time, the pair of connecting strings 7 and 8 passed in a cross shape are engaged with the lifted object 60 when the lifted object 60 is first floated, and during the lifting and after lifting, The pair of bellows bag bodies 20 and 30 act so as to pull each other toward the inside which is a facing surface. As a result, the wobbling of the bellows bag bodies 20 and 30 during and after the lifting hardly occurs, and the lifted object 60 can be lifted stably.
[0041]
【The invention's effect】
As described above, the present invention arranges a pair of bellows bag bodies facing each other with a certain interval, introduces air into the bellows bag bodies, and is placed substantially above the pair of bellows bag bodies. A bellows-type air lifter for lifting the lifted object, wherein the pair of bellows bag bodies are formed so that a plurality of individual bags are connected and expanded upward with the introduction of air, The pair of bellows bag bodies are connected to each other at the upper portion by a pair of connecting cords that are crossed to each other. As the bag body expands upward, the pair of bellows bag bodies are formed so as to be pulled to the inside, which is the opposite surface. Excellent compactness and even cheaper Extremely excellent effect that long strokes are obtained is expressed.
[Brief description of the drawings]
FIG. 1 is a schematic front view (lifted state) mainly showing a bellows type air lifter of the present invention.
2 (a) is a schematic plan view of a pair of bellows bags before introduction of air (before lift), as viewed from above, and FIG. 2 (b) is a cross-sectional view taken along line A- of FIG. 2 (a). It is A arrow schematic sectional drawing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Bellows type air lifter 7, 8 ... Connection string 20, 30 ... Bellows bag body 21,22,23,24 ... Individual bag 31,32,33,34 ... Individual bag 60 ... Lifted object

Claims (11)

A pair of bellows bag bodies are arranged opposite to each other with a predetermined interval, and air is introduced into the bellows bag bodies to substantially lift the lifted object placed on the upper part of the pair of bellows bag bodies. A bellows type air lifter for
The pair of bellows bag bodies are formed by connecting a plurality of individual bags and expanding upward with the introduction of air,
The pair of bellows bag bodies are connected by a pair of connecting strings passed in a cross shape to each other at the upper part thereof,
As the pair of bellows bag bodies expands upward together with the introduction of air to lift the lifted object, the pair of connection cords are pulled to the inside which is the opposing surface. A bellows type air lifter characterized by being formed. The pair of connecting strings passed in a cross shape are respectively arranged in the vicinity of both ends of the bellows bag body in a direction along a predetermined arrangement interval of the pair of bellows bag bodies,
One end of the pair of connecting cords passed in the cross shape is connected to the uppermost individual bag of the bellows bag body arranged opposite to each other, and the other end of the pair of connecting cords passed in the cross shape is The bellows type air lifter according to claim 1, wherein the bellows type air lifter is connected to an individual bag located below the uppermost part of the bellows bag bodies arranged to face each other. The bellows type air lifter according to claim 1 or 2, wherein the plurality of individual bags constituting the bellows bag body are connected in a range of 2 to 6. The bag body located at the lowermost part of the pair of bellows bag bodies is connected to an air introduction member to enable simultaneous air supply to both of the bellows bag bodies, respectively. The bellows type air lifter according to any one of the above. The bellows type air lifter according to any one of claims 1 to 4, wherein a lower portion of the pair of bellows bag bodies is fixed to a movable support and can be carried together with the movable support. The bellows type air lifter according to any one of claims 1 to 5, wherein a lower portion of the pair of bellows bag bodies is fixed to a movable support body so as to be inclined inwardly of an interval between the pair of bellows bag bodies. The bellows type air lifter according to any one of claims 1 to 6, wherein a fixing sheet for fixing the bag body is formed in a lower portion of the pair of bellows bag bodies. The bellows type air lifter according to any one of claims 1 to 7, wherein the lifted object is placed in a direction in which a central axis direction thereof is along a predetermined arrangement interval of the pair of bellows bag bodies. The bellows type air lifter according to any one of claims 1 to 8, wherein a vertical load of the lifted object is present at a substantially center position of the pair of bellows bag bodies. The bellows-type air lifter according to any one of claims 1 to 9, wherein an upper planar shape of the bellows bag body is a substantially rectangular shape. The bellows type air according to any one of claims 1 to 10, wherein a capacity of a bag body located at a lowermost portion of the pair of bellows bag bodies is set larger than a capacity of a bag body located at an uppermost portion. Lifter.

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