JP5351424B2 - Lifting jig that is crimped to the inner peripheral surface of the annular member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein a conventional structure, in which a jig body provided for a robot arm or an arm attached for a device is provided with a chuck claw or a claw and the chuck claw or the claw is engaged with a roll to be processed or a bobbin and the roll to be processed or the bobbin is lifted up, is effective for lifting up a relatively lightweight object as all the weight of the roll to be processed or the bobbin is applied to this chuck claw or the claw but is not suitable for a heavy object. <P>SOLUTION: In this invention, a structure expandable and shrinkable to radial direction of a rod form lifting body inserted into a space part of stator is provided for the lifting tool pressed to the inner circumference surface of the stator. The lifting tool consists of a plurality of plates of which side surfaces of base end parts are pivoted at three places of the lifting body from a plane vision, a plurality of cramp plates pivoted at side surfaces of free end parts of the plurality of plates and claw pieces provided at lower ends of radial side surfaces of the plurality of cramp plates and is capable of suspending the stator surely and safely. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

Detailed Description of the Invention

  The present invention relates to a lifting jig that is crimped to an inner peripheral surface of an annular member.

  Conventionally, in order to grasp (chuck, hold) an annular member having a heavy weight such as a workpiece, a stator for a motor, etc., as a structure that is carried out from the outside via a plurality of grasping means such as grasping claws, for example, Japanese Patent Laid-Open No. 5-285777 is disclosed. "Turret Lathe Work Dispensing Jig" is available (reference 1). The present invention has a structure in which a workpiece is supported from the outside through a plurality of workpiece gripping claws pivotally attached to a jig body, and is intended to shorten the time for dispensing. As another example, as a structure performed from the inside through a plurality of chuck claws or the like, there is, for example, “a method for storing and taking out a plate-making roll in a roll three-dimensional warehouse” disclosed in JP-A-2002-26509 (referred to as Document 2). ). The present invention is a chuck opening / closing means suspended from a robot arm, and the chuck opening / closing means includes a chuck body provided with chuck claws, a pair of curing material pressing plates provided at intervals on the chuck body, and The chuck body and / or the curing material pressing plate is configured to move, and the chuck body is inserted into the chucked hole (upper space) of the plate-making roll so that the chuck claws can be moved in the radial direction. After the chuck claw is in a state of being hooked on the edge of the chucked hole of the plate-making roll, it is lifted through the robot arm and taken out from the roll storage box, or the roll storage box through the reverse operation. Intended to store and take out pre-made rolls easily and reliably in a partitioned roll storage box That. Furthermore, there is a “bobbin chuck device” disclosed in Japanese Utility Model Laid-Open No. 5-16183 (referred to as Document 3). This device is composed of three claw members that expand and contract a chuck device, a claw provided at the lower end of the claw member, a cam and / or a drive unit that expands and contracts the claw member, , Which is inserted into the small-diameter side of the cone-shaped bobbin forming the package, and the nail is hooked on the return of the small-diameter side (upper space) of the bobbin to lift and support the cone-shaped bobbin on which the package is formed Intended to support and move.

JP-A-5-285777 JP 2002-265209 A Utility Kaihei 5-16183

  Reference (1) described above is a structure that chucks with a workpiece gripping claw from the outside of the workpiece, and thus can support heavy workpieces, but is different from the structure and intention of the present invention.

  The above-mentioned documents (2) and (3) have a structure in which the chuck claw or the claw is locked in the space above the plate-making roll or bobbin and the plate-making roll or bobbin is lifted. In this structure, all the weights of the plate-making rolls or bobbins are applied to the chuck claws or the claws. Therefore, it is considered effective for the intended plate-making roll or bobbin. However, in the structure of these documents (2) and (3), that is, the structure of the edge of the chucked hole of the plate-making roll (upper opening hook projection) or the return of the bobbin, It is considered unsuitable for stable lifting. Therefore, it is considered that the structures of the documents (2) and (3) are not suitable for stably lifting heavy annular members such as workpieces and stators for motors intended by the present invention.

  Documents (2) and (3) have a structure in which a chuck claw or claw is locked to a plate making roll or bobbin and the plate making roll or bobbin is lifted. Therefore, it is considered that the chuck pawl or the pawl always has a heavy weight when it is lifted, and particularly when a heavy object is lifted, it may cause metal fatigue and leave a problem in durability.

  Further, Documents (2) and (3) are left and right movements of the chuck body or the claw member, and a limit is felt in the movement distance. Therefore, it cannot be considered that a large-diameter plate making roll or bobbin having a large diameter and a small diameter are locked and the large-diameter plate making roll or bobbin is lifted, that is, a general-purpose lifting jig (gripping means).

  In addition, these references (2) and (3) are the structures described above, and there are improvements such as complicated structure, experience in handling, or increase in cost. Can be mentioned.

  In order to solve the above-described problems, the present invention has the following structure, and thereby, the following effects can be exhibited.

  “1” The structure is a structure in which a lifting body that can be lifted by being attached to a heavy machine such as a crane or various machines is provided with a plate that expands and contracts in the radial direction and a clamp plate that has a claw piece that can be moved by this plate. The lifting jig is inserted inside a heavy annular member (described in the stator) such as a workpiece, a stator for a motor, and the claw piece of the clamp plate of the lifting jig is inserted. After engaging the lower end surface inside the stator, the weight of the stator is used for the pressure in the plate expansion direction through a lifting operation, and the clamp plate is pressed against the inner surface of the stator. And

  “2” The weight of the stator is used for the pressure in the plate expanding direction, and a clamp plate is pressed against the inner surface of the stator, so that the stator can be supported securely and firmly.

  “3” The structure is such that the clamping plate is pressed against the inner surface of the stator by using the pressure in the spreading direction of the plate and / or the length of the plate, and the stator can be supported. The diameter of the inner surface of the stator There is an effect that can be used regardless of whether the diameter is small or large.

  “4” A structure in which a pair of plates are pivotally attached to the lifting main body with the same shaft core, and has features such as reliable and smooth movement of the plates and improvement of durability of the plates.

“5” Since the plate can be accommodated in the notch recess of the lifting main body, the lifting jig can be accommodated in a compact manner, and it is convenient to carry, or the paired plates are not blinded separately, and noise. In addition, it has features such as that it can be accurately scaled without causing any problem .

  “6” By providing an operation mechanism that can complement the expanded state of the plate, there is an effect that the clamp plate is pressed against the inner surface of the stator, and the stator can be supported securely, firmly, and stably.

The invention of claim 1 is intended to achieve the above-mentioned features “1”, “2”, “3” , “5” .

According to a first aspect of the present invention, there is provided a rod-like lifting body inserted into the space of the annular member, and the lifting body can be expanded and contracted in the radial direction of the lifting body. A plurality of plates pivoted on the side surfaces, a plurality of clamp plates pivotally mounted on the side surfaces of the free ends of the plurality of plates, and a lower end of the radial side surface of the plurality of clamp plates In the lifting jig that is crimped to the inner peripheral surface of the annular member constituted by the claw piece ,
The lifting body is formed with a plurality of triangular cutout recesses in a cross-sectional view, and mounting walls are formed in the cutout recesses. This is a lifting jig that is pressure-bonded to the inner peripheral surface of an annular member that is configured to be able to be accommodated so that the flat inner side surface of the base end portion is attached to each other.

  The invention of claim 2 is intended to achieve the feature of claim 1 and the above-mentioned “4”.

Claim 2 is a lifting jig to be crimped to the inner peripheral surface of the stator according to claim 1,
The plates are provided in pairs on the lifting main body via pivots, and the pivots pivotally attached to the side surfaces of the free end portions of the plates have the same axial center in the pair of plates. It is a lifting jig that is crimped to the peripheral surface.

The invention of claim 3 is intended to achieve the features of claim 1.

Claim 3 is a lifting jig to be crimped to the inner peripheral surface of the stator according to claim 1,
This claw piece is a lifting jig that is crimped to the inner peripheral surface of the stator that protrudes from the radiation side surface of each clamp plate.

The inventions of claims 4 and 5 are intended to achieve the characteristics of claim 1 and the above-mentioned “6”.

Claim 4 is a lifting jig to be crimped to the inner peripheral surface of the stator according to claim 1,
This lifting tool is a lifting jig that is crimped to the inner peripheral surface of a stator that has a configuration in which an operating mechanism that complements the expanded state of each plate is attached to the lifting body.

Claim 5 is a lifting jig to be crimped to the inner peripheral surface of the stator according to claim 4 ,
The operating mechanism includes a ring body slidably provided on the lifting body, and a base end portion pivotally attached to a plurality of flanges of the ring body, and a free end portion of the plurality of clamp plates. A lifting jig that is press-bonded to an inner peripheral surface of a stator that is formed by a plurality of operation plates that are pivotally attached and an operation rod that is pivotally attached to at least one of the collar pieces of the ring.

According to the first aspect of the present invention, there is provided a rod-like lifting main body inserted into the space portion of the stator, and can be expanded and contracted in the radial direction of the lifting main body. A plurality of plates pivotally attached, a plurality of clamp plates pivotally attached to the side surfaces of the free ends of the plurality of plates, and a claw piece provided at the lower end of the radiation side surface of the plurality of clamp plates; , in lifting the jig is pressed against the inner peripheral surface of the structure and stator,
The lifting body is formed with a plurality of triangular cut-out recesses in cross-sectional view, and each mounting wall is formed in the cut-out recess, and both wall surfaces of each mounting wall have a base end portion of each plate. This is a lifting jig that is pressure-bonded to the inner peripheral surface of an annular member configured to be able to be accommodated so that the flat inner side surfaces are attached to each other.

Therefore, claim 1 can achieve the above-mentioned features “1”, “2”, “3”, “5” .

The invention of claim 2 is a lifting jig to be crimped to the inner peripheral surface of the stator of claim 1,
The plates are provided in pairs on the lifting main body via pivots, and the inner peripheral surface of the stator is configured such that the pivots pivotally attached to the side surfaces of the free ends of the plates serve as the same axis in the pair of plates. It is a lifting jig to be crimped to.

  Therefore, claim 2 can achieve the feature of claim 1 and the above-mentioned “4”.

The invention of claim 3 is a lifting jig that is crimped to the inner peripheral surface of the stator according to claim 1,
The claw piece is a lifting jig that is pressure-bonded to the inner peripheral surface of the stator that protrudes from the radiation side surface of each clamp plate.

Therefore, claim 3 can achieve the features of claim 1.

The invention of claim 4 is a lifting jig to be crimped to the inner peripheral surface of the stator according to claim 1,
This is a lifting jig that is pressure-bonded to the inner peripheral surface of a stator that has a configuration in which an operating mechanism that complements the expanded state of each plate is attached to the lifting body.

The invention of claim 5 is a lifting jig to be crimped to the inner peripheral surface of the stator according to claim 4 ,
The operating mechanism has a ring body slidably provided on the lifting main body, a base end portion pivotally attached to a plurality of flange pieces, and a free end portion pivotally attached to a plurality of clamp plates. This is a lifting jig that is pressure-bonded to an inner peripheral surface of a stator that is formed by a plurality of operation plates and an operation rod pivotally attached to at least one of ring-shaped flange pieces.

Therefore, claims 4 and 5 can achieve the characteristics of claim 1 and the above-mentioned “6”.

  An example of the present invention will be described.

  1 is an overall perspective view of a plate in an expanded state, showing a typical first example, FIG. 2 is an overall perspective view of a contracted state of FIG. 1, and FIG. 3 is a use state of FIG. FIG. 4 is a front view of FIG. 1 and FIG. 5 is a bottom view of FIG. 6 is a partially omitted front view showing the second example, FIG. 7 is a bottom view of FIG. 6, and FIG. 8 is a use state of FIG. FIG. 9 and FIG. 9 are bottom views partially omitted from FIG. FIG. 10 is a front view of the third example in a partially omitted front view in the middle of the plate, and FIG. 11 is a partially omitted bottom view of FIG. Further, FIG. 12 is a partially omitted front view of the fourth example in a state where the plate is greatly expanded, and FIG. 13 is a partially omitted bottom view of FIG. 14 is a partially omitted front view of the plate in the maximum expanded state, and FIG. 15 is a partially omitted bottom view of FIG.

The first example to the fifth example have the same basic structure, and this basic structure will be described. 1 is an annular member (in this example, hereinafter referred to as “stator W”. The rod-shaped lifting main body is inserted into the space portion W1, and the lifting main body 1 has a plurality of notched recesses 2 that are substantially triangular in cross section. The Y-shaped mounting wall 3 is formed in plan view . Then , both wall surfaces 300 and 301 of this Y-shaped mounting wall 3 (in some cases, it can be provided only on one wall surface 300 side), and the upper side 300a and 301a and the lower side 300b and 301b are The base end portions 500 and 500a of the plates 5 and 5a, which are provided in pairs with the mounting wall 3 sandwiched between them, can be expanded and contracted in the radial direction A of the lifting main body 1 via the pivot 6. The flat inner side surfaces of the base end portions 500 and 500a are brought into contact with the flat surfaces of the wall surfaces 300 and 301. Accordingly, the pair of plates 5 and 5a are structured to be expanded and contracted accurately without causing blind motion and noise. In this example, the flat inner side surfaces 500-of the base end portions 500, 500 a of the plates 5, 5 a are respectively attached to the both wall surfaces 300, 301 of each mounting wall 3 formed at three locations of the lifting main body 1 in plan view. Since 1,500a-1 is pivotally attached, a total of twelve plates 5, 5a are pivotally attached to the attachment wall 3 of the lifting body 1 respectively. The free end portions 501 and 501a of the respective plates 5 and 5a are brought into contact with the flat inner side surfaces 500-1 and 500a-1 of the clamp plates 7 through the flat end surfaces 501 and 501a. The clamp plate 7 is clamped by the flat inner side surfaces 500-1 and 500a-1 of 501a, and is pivotally attached via the pivot shaft 8. Therefore, the clamp plate 7 does not blindly move and does not emit noise, and has a structure that can be expanded and contracted accurately. Since the clamp plates 7 are pivotally attached to the free ends 501 and 501a of the plates 5 and 5a, respectively, in this example, there are three clamp plates. In the drawing, reference numeral 700 denotes a radiation side surface 700 of the clamp plate 7.

As described above, on the flat surface 701 of each clamp plate 7, the free ends 501 and 501a of the pair of plates 5 and 5a that are pivotally attached to both wall surfaces 300 and 301 of each mounting wall 3 are pivotally attached. The pair of plates 5 and 5a are sandwiched. Accordingly, the three clamp plates 7 are configured to be expanded and contracted (moved) in the radial direction A accurately and reliably at the same time in accordance with the expansion and contraction of the plates 5 and 5a in the radial direction A.

  And the claw piece 10 is formed in the lower end of the radiation | emission side surface 700 of each clamp plate 7, respectively, and this claw piece 10 has a structure which protrudes from the radiation | emission side surface 700, respectively.

  The base end portions 500 and 500a of the pair of plates 5 and 5a described above are pivotally attached to the mounting wall 3 of the lifting main body 1 via the pivot shaft 6, and the base end portions 500 and 500a have the same shaft. Become the core. Similarly, the free ends 501 and 501a of the pair of plates 5 and 5a are pivotally attached to the clamp plate 7 via the pivot 8, and the base ends 501 and 501a have the same axis. Accordingly, the clamp plate 7 is not blindly moved and is accurately pressed (described later) to the inner surface W11 of the stator W.

  Subsequently, the plates 5 and 5a that are moved in the diameter reducing direction (arrow Y) and restricted to be accommodated in the cutout recess 2 of the lifting main body 1 (in the case of a pair, one symbol, in this example, 5 With this, the clamp plate 7 is moved so as to move in the diameter-reducing direction (arrow Y) and is regulated so as to contact the radial side surface 302 of the mounting wall 3 of the lifting body 1. Is inserted into the space W1 of the stator W together with the lifting main body 1. Then, with the claw pieces 10 of the clamp plate 7 placed below the lower end surface W2 of the stator W, the respective restrictions are released, so that the plate 5 has its own weight and its free end 501 has a radial direction. It moves in A (expanding direction (arrow X)), and with this movement, the radiation side surface 700 of the crank plate 7 comes into surface contact with the circumferential surface W11 of the space W1.

  Therefore, the lifting main body 1 (including the plate 5 and the clamp plate 7; the same applies hereinafter) is pulled up, the claw piece 10 is locked to the lower end surface W2, and the stator W is temporarily fixed. Thereafter, the lifting work is further performed. In this lifting operation, the weight of the stator W is used for the pressure in the expanding direction (arrow X) of the free end 501 of the plate 5, and the clamp plate 7 is strongly pressed (strongly pressed) against the inner surface W <b> 11 of the stator W. The Further, since the weight of the stator W with respect to the claw piece 10 is relaxed through this strong pressure, the claw piece 10 is not damaged. Further, the claw piece 10 is provided over substantially the entire width of the radial side surface 700 of the crank plate 7 and takes a long dimension toward the lower end side, so that it can effectively cope with the load. In this state, after the stator W is conveyed to a predetermined location, the plate plate 7 is lowered from the lower end surface W2 and the engagement between the claw piece 10 and the lower end surface W2 is released. 501 is moved in the direction of diameter reduction (arrow Y), and the radiation side surface 700 of the clamp plate 7 is separated from the inner surface W11 of the stator W. In this state, the lifting main body 1 is slowly moved upward, and the lifting main body 1 is pulled out from the space portion W1 to complete the operation. When the claw piece 10 of the clamp plate 7 is installed below the lower end surface W2 of the stator W, the engaging portion of the claw piece 10 on the lower end surface W2 of the space W1 of the stator W is in a free state ( In order to place the stator W, a floor surface, a pedestal or the like in contact with the outside of the lower end surface W2, etc. is adopted, and the inner surface W11 side and the space W1 of the lower end surface W2 are not in contact with the floor surface, the pedestal, etc. ) Is desirable. In the conventional technology, an opening hook is provided on the outside of the workpiece or above the hole provided in the center of the workpiece (upper space), and the claw is locked there, so that the entire weight of the workpiece is applied to the claw, There was a problem with durability, and in order to lift it, several times as much force as the weight was required. In addition, the load of the entire workpiece is applied to the opening hook portion, and there are concerns about problems such as chipping, dropping, and distortion. However, in the present invention, since the pressure plate is pressed against the inner surface W11 of the workpiece (stator W) of the clamp plate 7, the weight of the stator W is used for this pressure, and the stator W can be lifted without being detached. Further, since the load on the claw piece 10 is reduced by this pressure contact and the claw piece 10 being locked to the lower end surface W2 of the stator W, only a part of the claw piece 10 and the stator W is subjected to a load. In addition, problems such as missing, dropping, and distortion of the claw piece 10 and the stator W can be avoided and can be safely supported.

  The operation mechanism 20 shown in the second to fifth examples will be described. The operation mechanism 20 includes an annular body 21 that is slidably provided on the lifting main body 1 and a plurality of flanges (hereinafter referred to as the annular body 21). However, it can also be provided on the back side (not shown)), and a plurality of operation plates 22 pivotally attached to the base end portion 22a via a pivot. And an operating rod 23 pivotally attached to the other flange piece 21b of the ring body. In this embodiment, the operating rod 23 is provided only on the other flange 21b, but it is also possible to provide it on a plurality of flanges. The free end sides 22b of the plurality of operation plates 22 are pivotally attached to the plurality of clamp plates 7 via pivots. Therefore, in this example, the ring body 21 is pulled up along the shaft portion 100 of the lifting main body 1 via the operating rod 23 (the operating mechanism 20 is raised), and the free end side 22b of the operating plate 22 is contracted. After the plate 5, the clamp plate 7 and the lifting body 1 are inserted into the space W <b> 1 of the stator W and moved in the radial direction (arrow Y), and the claw piece 10 is temporarily fixed to the lower end surface W <b> 2 of the stator W. Then, the operating rod 23 is pushed down or the pulling force of the operating rod 23 is weakened, and the ring body 21 is pulled down along the shaft portion 100 of the lifting main body 1 (the operating mechanism 20 is lowered). By pulling down the ring body 21, the free end side 22 b of the operation plate 22 is expanded in the radial direction (arrow X), and the radial side surface 700 of the clamp plate 7 is in pressure contact with the inner surface W 11 of the stator W. The claw piece 10 is locked to the lower end surface W2 (see FIGS. 8, 10, 12, etc.). As long as the lowering position of the operating rod 23 and the expanded position of the operating plate 22 are secured, the locking (locked state) is maintained, so that safety can be ensured. And in this locked state, it is the same as the lifting operation of the above-mentioned example, the weight of the stator W is used for the pressure in the expansion direction (arrow X) of the plate 5, and the clamp plate 7 The inner surface W11 of the stator W is strongly pressed (strong pressure). Then, the stator W is moved to a predetermined location through the movement of the lifting main body 1 and / or the operation mechanism 20. To remove the stator W from the lifting body 1 after this movement, the free end 22b of the operation plate 22 is contracted by pulling up the operating rod 23 and moving the ring body 21 along the shaft portion 100. It moves in the radial direction (arrow Y), and is the same as the removal work in the above example, lowering the entire lifting main body 1 from the lower end surface W2, and releasing the engagement between the claw piece 10 and the lower end surface W2, The free end 501 of the plate 5 is moved in the diameter reducing direction (arrow Y), and the radiation side surface 700 of the clamp plate 7 is separated from the inner surface W11 of the stator W. In this state, the lifting main body 1 and / or the operating rod 23 (operation mechanism 20) is gently moved upward, and the lifting main body 1 is pulled out from the space portion W1 to complete the operation. Others are based on the above example. In this embodiment, the operation mechanism 20 enables automatic operation and / or remote operation of the lifting jig, which can contribute to speeding up / simplification of work, speeding up, safety, and the like.

  In addition, an inclined surface 200 is formed above the notch recess 2 to determine the accommodation position of the plate 5, facilitating handling, reliability of accommodation, avoidance of collision (avoidance of failure / breakage), and aesthetics. It can also be used for improvement, etc., and there are practical benefits such as improvement in strength of the lifting main body 1 and / or plate 5 and the like, avoiding collision of the plate 5 at the time of accommodation, and eliminating failure and breakage. Furthermore, the ease of accommodation of the plate 5 and the improvement of safety make it easy to handle the operating mechanism 20, the certainty of accommodation, avoidance of collision, or failure / breakage. .

FIG. 1 is an overall perspective view of a plate in an expanded state showing a typical first example. 2 is an overall perspective view of the reduced state of FIG. FIG. 3 is an enlarged overhead view of the omission showing the relationship between the stator and the claw piece in the use state of FIG. 4 is a front view of FIG. 5 is a bottom view of FIG. FIG. 6 is a partially omitted front view showing a second example. 7 is a bottom view of FIG. FIG. 8 is a front view of the use state of FIG. FIG. 9 is a bottom view partially omitted from FIG. FIG. 10 is a state in which the third example is used, and is a front view of a partially omitted state in the middle of the plate. FIG. 11 is a bottom view of FIG. FIG. 12 is a partially omitted front view of the fourth example in a state where the plate is greatly expanded. 13 is a bottom view partially omitted from FIG. Fig. 14 is a front view of the fifth example in which the plate is partially expanded in the maximum expanded state. 15 is a bottom view of FIG. 14 partially omitted.

DESCRIPTION OF SYMBOLS 1 Lifting body 100 Shaft part 2 Notch recessed part 200 Inclined surface 3 Mounting wall 300 Wall surface 300a Upper side 300b Lower side 301 Wall surface 301a Upper side 301b Lower side 302 Radiation side side surface 5 Plate 5a Plate 500 Base end part 500-1 Flat inner side surface 500a Base End 500a-1 Flat inner side 501 Free end 501a Free end 6 Pivot 7 Clamp plate 700 Radial side 701 Flat surface 8 Pivot 10 Claw piece 20 Operating mechanism 21 Ring 21a One collar piece 21b The other collar piece 22 For operation Plate 22a Base end 22b Free end 23 Operation rod A Radial direction X Arrow Y Arrow W Stator W1 Space W11 Inner surface W2 Lower end surface

Claims (5)

A rod-like lifting body inserted into the space of the annular member, and the lifting body can be expanded and contracted in the radial direction. The side surface of the base end is pivotally attached to at least three places in plan view of the lifting body. A plurality of plates, a plurality of clamp plates pivotally attached to the side surfaces of the free ends of the plurality of plates, and a claw piece provided at the lower end of the radiation side surface of the plurality of clamp plates. In the lifting jig to be crimped to the inner peripheral surface of the configured annular member ,
The lifting body is formed with a plurality of triangular cutout recesses in a cross-sectional view, and mounting walls are formed in the cutout recesses. A lifting jig that is pressure-bonded to an inner peripheral surface of an annular member that is configured to be able to be accommodated so that a flat inner side surface of a base end portion is attached to each other.
A lifting jig that is crimped to the inner peripheral surface of the annular member according to claim 1,
This plate is provided in pairs on the lifting main body via a pivot, and the pivot that is pivotally attached to the side surface of the free end of the plate is an annular member configured to be the same axis in the pair of plates. Lifting jig that is crimped to the inner surface.
A lifting jig that is crimped to the inner peripheral surface of the annular member according to claim 1,
This claw piece is a lifting jig that is crimped to the inner peripheral surface of an annular member configured to protrude from the radiation side surface of each clamp plate.
A lifting jig that is crimped to the inner peripheral surface of the annular member according to claim 1,
A lifting jig that is pressure-bonded to the inner peripheral surface of an annular member that is configured such that an operating mechanism that complements the expanded state of each plate is attached to the lifting body.
A lifting jig that is crimped to the inner peripheral surface of the annular member according to claim 4 ,
The operating mechanism includes a ring body slidably provided on the lifting body, and a base end portion pivotally attached to a plurality of flanges of the ring body, and a free end portion of the plurality of clamp plates. A lifting jig that is pressure-bonded to an inner peripheral surface of an annular member that is formed of a plurality of operation plates that are pivotally attached and an operation rod that is pivotally attached to at least one of the collar pieces of the ring.

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