JP3997339B2

JP3997339B2 - Method and apparatus for lifting cylindrical object

Info

Publication number: JP3997339B2
Application number: JP10933397A
Authority: JP
Inventors: 清司中島
Original assignee: 株式会社ハイメックス
Priority date: 1997-04-25
Filing date: 1997-04-25
Publication date: 2007-10-24
Anticipated expiration: 2017-04-25
Also published as: JPH10297881A

Description

【０００１】
【発明の属する技術分野】
この発明は、ロール紙その他の筒状重量物を持ち上げることを目的とした筒状物の持上げ方法及び装置に関するものである。
【０００２】
【従来の技術】
従来ロール紙などの重量の大きい筒状物の下部へ、フォークリフト等の爪片を入れ（又は抜く）るには、筒状部内へ、鉄パイプなどを挿入し、人力により鉄パイプなどを傾けて筒状物を傾け、該筒状物と、床面との間に爪片挿入用の隙間を作っていた。
【０００３】
【発明により解決すべき課題】
前記筒状物が２００kg〜５００kgというように、重くなった場合に、前記のように人力に依存すると、作業が危険になるおそれがあるのみならず、腰痛を生じるおそれがあり、更に作業能率の向上がむつかしいなどの問題点がある。
【０００４】
【課題を解決する為の手段】
この発明は、筒状物の中空筒内へ、伸長と、固定のできる持上げ装置を挿入し、加圧エアなどで入力することにより、重量物を容易に持上げるようにして前記従来の問題点を解決したのである。この発明の持上げ装置によれば、筒状物を垂直方向へ平行に持ち上げることができるので、フォークリフトの爪片などを水平方向からの挿し入れ、又は引き抜く場合に局部的外力が働くおそれがなく、筒状物の隅部などを傷つけるおそれもない。
【０００５】
即ち方法の発明は、下面が床面に当接するように置かれている筒状物の上下方向に延びる中空部内に上側方向から筒状物の持上げ装置を装入し、当該筒状物の持上げ装置に当該筒状物の持上げ装置の上端側から加圧空気を供給することにより、当該筒状物の持上げ装置の外周に配備されている環状弾性体を前記筒状物の半径方向に膨張させ、当該環状弾性体の外壁を前記筒状物の中空部の内壁に加圧当接させて前記筒状物の持上げ装置を前記筒状物の中空部の内壁に固定すると供に、前記筒状物の持上げ装置の下端側を前記筒状物の軸方向で上側から下側に向けて前進させ、前記筒状物の持上げ装置の下端面を前記床面に当接させて、前記床面と前記筒状物の下面との間に隙間を形成して前記筒状物を持上げることを特徴とした筒状物の持上げ方法である。
【０００６】
前記本発明の方法において、前記筒状物の持上げ装置に前記筒状物の持上げ装置の上端側から加圧空気を供給することにより、前記筒状物の持上げ装置の下端側を前記筒状物の軸方向で上側から下側に向けて前進させ、前記筒状物の持上げ装置の下端面を前記床面に当接させて、前記床面と前記筒状物の下面との間に隙間を形成する動作は、前記筒状物の持上げ装置の下端側に配備されている油圧シリンダーを前記筒状物の軸方向で上側から下側に向けて前進させるべく、前記筒状物の持上げ装置に前記筒状物の軸方向に摺動可能に配備されていて、前記筒状物の軸方向で上側から下側に向けて移動することにより、前記油圧シリンダーが前記筒状物の軸方向で上側から下側に向けて移動するよう前記油圧シリンダー内に油を供給するピストンロッドを、前記加圧空気の供給により前記筒状物の軸方向で上側から下側に向けて移動させることによって行われることを特徴とするものである。
【０００７】
次に装置の発明は、筒体の一方の側に、当該筒体の軸方向に摺動可能に嵌装されている油圧シリンダーと、前記筒体に配備されていて、前記油圧シリンダーを前記筒体の他方の側に向けて付勢する第一の復帰スプリングと、前記油圧シリンダーを前記筒体の他方の側から一方の側に向けて移動させるべく、前記筒体の軸方向に摺動可能に前記筒体の他方の側に配備されていて、前記筒体の他方の側から一方の側に向けて移動することにより、前記油圧シリンダーが前記筒体の他方の側から一方の側に向けて移動するよう前記油圧シリンダー内に油を供給するピストンロッドと、前記筒体に配備されていて、前記ピストンロッドを前記筒体の他方の側に向けて付勢する第二の復帰スプリングと、前記筒体の他方の側の外周に配備されていて、内部に加圧空気が供給されることにより前記筒体の半径方向に膨張し、前記供給された加圧空気が排気されることにより収縮する環状弾性体と、前記筒体の他方の側に配備されている栓体であって内部に内腔を有する栓体とを備え、前記栓体の内腔内に前記筒体の外部から加圧空気を供給することにより、前記環状弾性体の内部への加圧空気の供給を行うと供に、前記ピストンロッドを前記筒体の他方の側から一方の側に向けて摺動させ、前記栓体の内腔から前記加圧空気を排気することにより、前記環状弾性体から排気すると供に、前記第一の復帰スプリングによる前記油圧シリンダーの前記筒体の他方の側に向けた移動及び、前記第二の復帰スプリングによる前記ピストンロッドの前記筒体の他方の側に向けた移動を行わせることを特徴とする筒状物の持上装置である。
【０００９】
前記において、加圧エアにより油圧を発生させたが、増圧および非圧縮性において油が優れており、給排使用する流体は、漏洩その他に不利がなく、必要量を自由に使用できる点で加圧エアが優れているので、この両者を併用したのである。
【００１４】
【実施例１】
この発明の実施例を図１、２、３に基づいて説明する。先づ移動すべき筒状物の中空部内へ、持上げ装置を手動で挿入する。この場合に、該持上げ装置は、伸伸長側（油圧シリンダー）を下にし、入力手段（加圧エア給送）を加える側を上にし、チェーンなどで吊り下げる。前記伸長手段が床上に着いたならば、入力手段のエアパイプを介して加圧エアを給送する（エアパイプに介装したバルブを開く）。
【００１５】
加圧エアの供給によって、先づ固定手段が作動し、持上げ装置と、筒状物を固定したならば、伸長手段に入力して、例えば油圧シリンダーを床面側へ伸長すると、油圧シリンダーは床面より下へ伸長できないので、結局筒状物が持上げられる。
【００１６】
前記筒状物の持上げ量は、フォークリフトなどの爪片が容易に挿入できる程度（例えば２０ｍｍ位）である。
【００１７】
前記のようにして、筒状物を持上げ、その下面と、床面とに必要な隙間ができたならば、フォークリフトなどの爪片、その他必要な物を挿入して、前記筒状物を支持し、ついで加圧エアを抜いて持上げ装置を作動前の状態に移した後、筒状物内から取り出す。
【００１８】
前記実施例においては、持上げ装置を手動で持ち運び又は挿入し、取出したが、機械を使用することを妨げないことは勿論、フォークリフトなど、筒状物を取扱う装置に持上げ装置を設置し、又はクレーンその他の装置を利用することもできる。
【００１９】
【実施例２】
この発明の装置の実施例を図２、３、４、５に基づいて説明する。筒体１の下端部に油圧シリンダー２を嵌装し、筒体１の上端に支持筒７の一端を連結し、支持筒７の外側壁へ、複数の環状弾性体３、３を嵌装固着する。前記油圧シリンダー２の上端内側に設けた環状段部４と、前記筒体１の下端外側に設けた環状鍔部５との間には、油圧シリンダー２の復帰スプリング６を内装し、前記筒体１の先端には、中空部と連通する通油孔８を穿設し、筒体１の中空側へ、流量制御用の鋼球９を移動可能に内装してある。
【００２０】
前記支持筒７の内側には、ピストンロッド１０が上下可能に内装され、ピストンロッド１０の下端のピストン１１は、前記筒体１の上部内側へ嵌挿され、前記ピストンロッド１０は中心部が中空にしてあって、復帰スプリング１２が内装され、該復帰スプリング１２の一端はピストンロッド１０の先端に固定し、他端は支持筒７の栓体１３に固定してある。
【００２１】
前記栓体１３の外壁には、吊り下げ用のチェーン１４の一端を固定すると共に、前記栓体１３の内腔１３ａに、エアパイプ１５を連結開口し、前記内腔１３ａは、通気孔１６を介して、支持筒７の周外壁に装着した環状弾性体３、３の内空部に連通させてある。前記油圧シリンダー２は、筒状胴部２ａの一側に、受圧頭２ｂを嵌挿固定して構成され、図中１７はプラグである。
【００２２】
前記実施例において、エアパイプ１５により、加圧エアを矢示１８のように送入すると、加圧エアは栓体１３の内腔１３ａに入り、矢示１９のように通気孔１６と、細隙２０を経て環状弾性体３、３へ夫々給送されるので、各環状弾性体３、３はは、矢示２１、２１のように夫々半径方向へ膨脹し、その外壁は、筒状物２２の内壁２２ａに加圧当接し、持上げ装置２３を固定する。
【００２３】
一方環状弾性体３、３が筒状物２２の内壁２２ａに当接すると、加圧エアの圧力が大きくなるので、ピストンロッド１０の端面１０ａを加圧する。そこでピストンロッド１０は、スプリング１２に抗し、これを伸長し乍ら、矢示２４の方向へ移動するので、ピストン１１に押された油は、通油孔８を通過して油圧シリンダー２内に入り、シリンダーヘッドを矢示２５の方向へ押し出す。この場合に、シリンダーヘッドは、床面２６に当接しているので、結局その突出分だけ筒状物が持ち上ることになるので、シリンダーヘッドの外面と、床面２６との間に隙間を生じ、該部へフォークリフトなどの爪片を挿入し、筒状物２２を持ち上げて次工程に移動することができる。
【００２４】
前記のようにして、筒状物２２をフォークリフトなどの爪片上に載せたならば、前記加圧エアの供給を中止すると共に、排気すればピストンロッド１０は復帰スプリング１２の収縮によって矢示２７のように復帰し、油圧シリンダー２も復帰スプリングの弾力により矢示２８のように復帰するので、環状弾性体３も旧位置に復帰し、筒状物２２の内壁２２ａと持上げ装置２３との固定がとけることになる。そこで各部は夫々旧位置に復帰するので、チェーン１４等を引上げて、持上げ装置２３を筒状物２２内から取出すことができる。このようにして、重量の大きい筒状物２２でも安全確実に持上げ、次工程へ送ることができる。
【００２５】
【発明の効果】
この発明によれば、下面が床面に当接するように置かれている筒状物の上下方向に延びる中空部内に上側方向から筒状物の持上げ装置を装入し、当該筒状物の持上げ装置に当該筒状物の持上げ装置の上端側から加圧空気を供給することにより、当該筒状物の持上げ装置の外周に配備されている環状弾性体を前記筒状物の半径方向に膨張させ、当該環状弾性体の外壁を前記筒状物の中空部の内壁に加圧当接させて前記筒状物の持上げ装置を前記筒状物の中空部の内壁に固定すると供に、前記筒状物の持上げ装置の下端側を前記筒状物の軸方向で上側から下側に向けて前進させ、前記筒状物の持上げ装置の下端面を前記床面に当接させて、前記床面と前記筒状物の下面との間に隙間を形成して、筒状物を必要な高さまで持ち上げることができる効果がある。この発明の装置は、油圧その他の力を利用するので、重量の大きい筒状物であっても、容易確実に持上げることができる効果がある。
【図面の簡単な説明】
【図１】この発明の実施例のブロック図。
【図２】同じく持上げ装置を筒状物内に収容した断面図。
【図３】同じく持上げ装置により筒状物を持上げた状態の断面図。
【図４】同じく持上げ装置の一部を省略した断面図。
【図５】同じく一部断面拡大図。
【符号の説明】
１筒体
２油圧シリンダー
３環状弾性体
４環状段部
５環状鍔部
６復帰スプリング
７支持筒
８通油孔
９鋼球
１０ピストンロッド
１１ピストン
１２復帰スプリング
１３栓体
１４チェーン
１５エアパイプ
１６通気孔
１７プラグ
２０細隙
２２筒状物
２３持上げ装置
２６床面[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and an apparatus for lifting a cylindrical object for the purpose of lifting roll paper and other cylindrical heavy objects.
[0002]
[Prior art]
To insert (or pull out) a claw piece such as a forklift into the lower part of a conventional heavy cylinder such as roll paper, insert an iron pipe or the like into the cylindrical part and tilt the iron pipe or the like manually. The cylindrical object was tilted, and a gap for inserting a claw piece was formed between the cylindrical object and the floor surface.
[0003]
[Problems to be solved by the invention]
When the cylindrical object becomes heavy, such as 200 kg to 500 kg, depending on human power as described above, not only the work may be dangerous, but also there may be a back pain, and the work efficiency is further improved. There are problems such as difficult improvement.
[0004]
[Means for solving the problems]
In the present invention, a lifting device that can be extended and fixed is inserted into a hollow cylinder of a cylindrical object, and a heavy object can be easily lifted by inputting with a pressurized air or the like. It was solved. According to the lifting device of the present invention, since the cylindrical object can be lifted in parallel in the vertical direction, there is no possibility of local external force acting when inserting or pulling out the claw pieces of the forklift from the horizontal direction, There is no risk of damaging the corners of the cylindrical object.
[0005]
That is, in the method invention, a cylindrical object lifting device is inserted from above into a hollow portion extending in the vertical direction of a cylindrical object placed so that the lower surface is in contact with the floor surface, and the cylindrical object is lifted. By supplying pressurized air from the upper end side of the cylindrical object lifting device to the apparatus, the annular elastic body arranged on the outer periphery of the cylindrical object lifting apparatus is expanded in the radial direction of the cylindrical object. The cylindrical elastic body is press-contacted to the inner wall of the hollow part of the cylindrical object to fix the lifting device of the cylindrical object to the inner wall of the hollow part of the cylindrical object, A lower end side of the lifting device of the object is advanced from the upper side to the lower side in the axial direction of the cylindrical object, the lower end surface of the lifting device of the cylindrical object is brought into contact with the floor surface, and the floor surface the lifting of the tubular product to form a gap and characterized by lifting the tubular material between the lower surface of the tubular product It is a method.
[0006]
In the method of the present invention, by supplying pressurized air from the upper end side of the cylindrical object lifting device to the cylindrical object lifting device, the lower end side of the cylindrical object lifting device is connected to the cylindrical object. The lower end surface of the cylindrical object lifting device is brought into contact with the floor surface, and a gap is formed between the floor surface and the lower surface of the cylindrical object. The forming operation is performed on the cylindrical object lifting device so as to advance the hydraulic cylinder arranged on the lower end side of the cylindrical object lifting device from the upper side to the lower side in the axial direction of the cylindrical object. The hydraulic cylinder is arranged so as to be slidable in the axial direction of the cylindrical object, and moves upward from the upper side in the axial direction of the cylindrical object, so that the hydraulic cylinder moves upward in the axial direction of the cylindrical object. A piston that feeds oil into the hydraulic cylinder to move downward from The rod, is characterized in that performed by moving toward the bottom from the upper in the axial direction of said tubular material by the supply of pressurized air.
[0007]
Next, the invention of the apparatus includes a hydraulic cylinder fitted on one side of the cylinder so as to be slidable in the axial direction of the cylinder, and the cylinder disposed in the cylinder. A first return spring that urges toward the other side of the body, and is slidable in the axial direction of the cylinder to move the hydraulic cylinder from the other side of the cylinder toward the one side Is arranged on the other side of the cylindrical body, and moves from the other side of the cylindrical body toward the one side, so that the hydraulic cylinder is directed from the other side of the cylindrical body to the one side. A piston rod that supplies oil into the hydraulic cylinder so as to move, a second return spring that is disposed on the cylinder and biases the piston rod toward the other side of the cylinder, Deployed on the outer periphery of the other side of the cylinder, An annular elastic body that expands in the radial direction of the cylinder when supplied with pressurized air and contracts when the supplied pressurized air is exhausted, and is disposed on the other side of the cylinder. A plug body having a lumen therein, and supplying pressurized air from the outside of the cylindrical body into the lumen of the plug body. While performing the supply of pressurized air, sliding the piston rod from one side of the cylindrical body to the other side, and exhausting the pressurized air from the lumen of the plug body, In addition to exhausting from the annular elastic body, the movement of the hydraulic cylinder toward the other side of the cylinder by the first return spring and the other of the cylinders of the piston rod by the second return spring It is characterized by having the movement toward the side of A lifting device that the tubular product.
[0009]
In previous reporting, but the hydraulic pressure caused by pressurized air, has excellent oil in the pressure increase and incompressible, fluid supply and discharge use, leakage Other no disadvantage, that it can use the necessary amount freely Since pressurized air is excellent, both of them are used together.
[0014]
[Example 1]
An embodiment of the present invention will be described with reference to FIGS. The lifting device is manually inserted into the hollow part of the cylindrical object to be moved first. In this case, the lifting device is hung with a chain or the like with the expansion / extension side (hydraulic cylinder) on the bottom and the input means (pressurized air feeding) on the side. When the extension means arrives on the floor, pressurized air is fed through the air pipe of the input means (a valve provided in the air pipe is opened).
[0015]
If the fixing means is actuated first by the supply of pressurized air and the lifting device and the cylindrical object are fixed, when the hydraulic cylinder is extended to the floor surface side, for example, the hydraulic cylinder is extended to the floor. Since it cannot extend below the surface, the cylindrical object is lifted after all.
[0016]
The lifting amount of the cylindrical object is such that a claw piece such as a forklift can be easily inserted (for example, about 20 mm).
[0017]
As described above, when the cylindrical object is lifted and a necessary gap is formed between the lower surface and the floor surface, a nail piece such as a forklift and other necessary objects are inserted to support the cylindrical object. Then, after removing the pressurized air and moving the lifting device to the state before the operation, the lifting device is taken out from the cylindrical object.
[0018]
In the above embodiment, the lifting device is manually carried or inserted and taken out. However, it does not prevent the use of the machine. Of course, the lifting device is installed in a device for handling a cylindrical object such as a forklift, or a crane. Other devices can also be used.
[0019]
[Example 2]
An embodiment of the apparatus of the present invention will be described with reference to FIGS. A hydraulic cylinder 2 is fitted to the lower end of the cylinder 1, one end of the support cylinder 7 is connected to the upper end of the cylinder 1, and a plurality of annular elastic bodies 3 and 3 are fitted and fixed to the outer wall of the support cylinder 7. To do. A return spring 6 of the hydraulic cylinder 2 is housed between an annular step 4 provided inside the upper end of the hydraulic cylinder 2 and an annular flange 5 provided outside the lower end of the cylinder 1. An oil passage hole 8 communicating with the hollow portion is bored at the tip of 1, and a steel ball 9 for flow rate control is movably housed inside the hollow body 1.
[0020]
A piston rod 10 is mounted on the inner side of the support cylinder 7 so as to be vertically movable. A piston 11 at the lower end of the piston rod 10 is fitted into the upper inner side of the cylinder 1, and the piston rod 10 has a hollow center. Thus, a return spring 12 is housed, one end of the return spring 12 is fixed to the tip of the piston rod 10, and the other end is fixed to the plug 13 of the support cylinder 7.
[0021]
One end of a suspension chain 14 is fixed to the outer wall of the plug body 13, and an air pipe 15 is connected and opened to the inner cavity 13 a of the stopper body 13, and the inner cavity 13 a is connected via a vent hole 16. Thus, the annular elastic bodies 3 and 3 attached to the outer peripheral wall of the support cylinder 7 are communicated with the inner space. The hydraulic cylinder 2 is configured by inserting and fixing a pressure receiving head 2b on one side of a cylindrical body 2a, and 17 in the drawing is a plug.
[0022]
In the above embodiment, when pressurized air is fed by the air pipe 15 as indicated by an arrow 18, the pressurized air enters the inner cavity 13 a of the plug 13, and the vent 16 and the slit as indicated by an arrow 19. 20, the annular elastic bodies 3, 3 are respectively fed to the annular elastic bodies 3, 3, so that each of the annular elastic bodies 3, 3 expands in the radial direction as indicated by arrows 21, 21, and the outer wall of the cylindrical elastic body 22 The inner wall 22a is pressed against and fixed, and the lifting device 23 is fixed.
[0023]
On the other hand, when the annular elastic bodies 3 and 3 come into contact with the inner wall 22a of the cylindrical object 22, the pressure of the pressurized air increases, so that the end surface 10a of the piston rod 10 is pressurized. Therefore, the piston rod 10 moves against the spring 12 and extends in the direction of the arrow 24, so that the oil pushed by the piston 11 passes through the oil passage hole 8 and enters the hydraulic cylinder 2. And push the cylinder head in the direction of arrow 25. In this case, since the cylinder head is in contact with the floor surface 26, the cylindrical object is lifted up by the amount of the protrusion, so that a gap is formed between the outer surface of the cylinder head and the floor surface 26. A claw piece such as a forklift can be inserted into the part, and the cylindrical object 22 can be lifted and moved to the next process.
[0024]
As described above, when the cylindrical object 22 is placed on a claw piece such as a forklift, the supply of the pressurized air is stopped and the piston rod 10 is moved by the contraction of the return spring 12 when the exhaust is exhausted. Since the hydraulic cylinder 2 also returns as indicated by arrow 28 by the elasticity of the return spring, the annular elastic body 3 also returns to the old position, and the inner wall 22a of the cylindrical object 22 and the lifting device 23 are fixed. It will be melted. Therefore, each part returns to the old position, and the lifting device 23 can be taken out from the cylindrical object 22 by pulling up the chain 14 and the like. In this way, even the heavy cylindrical object 22 can be lifted safely and reliably and sent to the next process.
[0025]
【The invention's effect】
According to the present invention, the cylindrical object lifting device is inserted from the upper direction into the hollow portion extending in the vertical direction of the cylindrical object placed so that the lower surface is in contact with the floor surface, and the cylindrical object is lifted. By supplying pressurized air from the upper end side of the cylindrical object lifting device to the apparatus, the annular elastic body arranged on the outer periphery of the cylindrical object lifting apparatus is expanded in the radial direction of the cylindrical object. The cylindrical elastic body is press-contacted to the inner wall of the hollow part of the cylindrical object to fix the lifting device of the cylindrical object to the inner wall of the hollow part of the cylindrical object, A lower end side of the lifting device of the object is advanced from the upper side to the lower side in the axial direction of the cylindrical object, the lower end surface of the lifting device of the cylindrical object is brought into contact with the floor surface, and the floor surface forming a gap between the lower surface of the tubular product, effect that can be lifted to a height necessary a tubular product There is. Since the apparatus of the present invention utilizes hydraulic pressure and other forces, there is an effect that even a heavy cylindrical object can be lifted easily and reliably.
[Brief description of the drawings]
FIG. 1 is a block diagram of an embodiment of the present invention.
FIG. 2 is a cross-sectional view in which the lifting device is housed in a cylindrical object.
FIG. 3 is a cross-sectional view showing a state where a cylindrical object is lifted by the lifting device.
FIG. 4 is a cross-sectional view in which a part of the lifting device is omitted.
FIG. 5 is a partially enlarged sectional view of the same.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylindrical body 2 Hydraulic cylinder 3 Annular elastic body 4 Annular step part 5 Annular collar part 6 Return spring 7 Support cylinder 8 Oil passage hole 9 Steel ball 10 Piston rod 11 Piston 12 Return spring 13 Plug body 14 Chain 15 Air pipe 16 Vent hole 17 Plug 20 Slit 22 Tubular object 23 Lifting device 26 Floor

Claims

A cylindrical object lifting device is inserted from above into a hollow portion extending in the vertical direction of the cylindrical object placed so that the lower surface is in contact with the floor surface,
By supplying pressurized air from the upper end side of the cylindrical object lifting device to the cylindrical object lifting device,
An annular elastic body arranged on the outer periphery of the cylindrical object lifting device is expanded in the radial direction of the cylindrical object, and the outer wall of the annular elastic body is pressed against the inner wall of the hollow portion of the cylindrical object In addition to fixing the cylindrical device lifting device to the inner wall of the hollow portion of the cylindrical material,
The lower end side of the cylindrical object lifting device is advanced from the upper side to the lower side in the axial direction of the cylindrical object, the lower end surface of the cylindrical object lifting device is brought into contact with the floor surface, and A gap is formed between the floor surface and the lower surface of the cylindrical object.
A method for lifting a cylindrical object characterized by lifting the cylindrical object.

By supplying pressurized air from the upper end side of the cylindrical object lifting device to the cylindrical object lifting device, the lower end side of the cylindrical object lifting device is lowered from the upper side in the axial direction of the cylindrical object. The operation of advancing toward the side, bringing the lower end surface of the cylindrical object lifting device into contact with the floor surface, and forming a gap between the floor surface and the lower surface of the cylindrical object,
In order to advance the hydraulic cylinder arranged on the lower end side of the cylindrical object lifting device from the upper side to the lower side in the axial direction of the cylindrical object, The hydraulic cylinder is arranged so as to be slidable in the axial direction and moves from the upper side to the lower side in the axial direction of the cylindrical object, so that the hydraulic cylinder is directed from the upper side to the lower side in the axial direction of the cylindrical object. the piston rod for supplying oil into the hydraulic cylinder to move Te, characterized by being performed by moving toward the bottom from the upper in the axial direction of the tubular material by the supply of the pressurized air The method for lifting a cylindrical object according to claim 1.

A hydraulic cylinder fitted on one side of the cylinder so as to be slidable in the axial direction of the cylinder;
A first return spring that is disposed on the cylinder and biases the hydraulic cylinder toward the other side of the cylinder;
The hydraulic cylinder is disposed on the other side of the cylinder so as to be slidable in the axial direction of the cylinder in order to move the hydraulic cylinder from the other side to the one side. A piston rod that supplies oil into the hydraulic cylinder so that the hydraulic cylinder moves from the other side of the cylindrical body toward the one side by moving from the other side toward the one side;
A second return spring disposed on the cylinder and biasing the piston rod toward the other side of the cylinder;
It is arranged on the outer periphery on the other side of the cylindrical body, expands in the radial direction of the cylindrical body by supplying pressurized air therein, and contracts by exhausting the supplied pressurized air An annular elastic body,
A plug disposed on the other side of the cylinder, the plug having a lumen therein;
With
In addition to supplying pressurized air to the inside of the annular elastic body by supplying pressurized air from the outside of the cylindrical body into the lumen of the plug body, the piston rod is attached to the cylindrical body. The hydraulic pressure by the first return spring is slid from the other side toward the one side and exhausted from the annular elastic body by exhausting the pressurized air from the lumen of the plug body. The movement of the cylinder toward the other side of the cylinder and the movement of the piston rod toward the other side of the cylinder by the second return spring are performed.
Lifting device of a tubular product, characterized in that.