JPH0940358A - Lifting jig and lifting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold a lifting object securely and to remove it in a very simple work while simplifying the work in the field, without using a work to compress the lifting object to a lifting jig manually, when the hanging object is lifted by the elevating means of a lifting mechanism. SOLUTION: This lifting jig 10 is provided with the first member 12 to support a hanging object 2 while receiving its dead weight at the lower side of the object 2; the second member 20 to hold the object 2 between the first member 12 as well as to apply the pressing force from the upper side of the object 2; and a motive power transmitting means 30 to make the opposing distance between the first member 12 and the second member 20 variable, and to convert the lifting force to the force in the reverse direction so as to transmit to the second member 20, as well as supporting the second member 20 by positioning between the object 2 and an elevating means 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoisting jig and a hoisting method, and more particularly to a hoisting jig used when a building member is moved up and down, and a hoisting method using the hoisting jig.

[0002]

BACKGROUND OF THE INVENTION In general,
A lifting mechanism such as a crane is used when lifting a heavy object such as a building member. In such a lifting mechanism, a lifting jig that is a member for connecting the lifting means of the lifting mechanism and the object to be lifted is required.

That is, in order that the lifting means of the lifting mechanism can securely hold the object to be lifted,
It is necessary to securely lock the object to be lifted by some kind of member.

FIG. 7A shows a beam member 20 which is a building member.
An example in which 0 is hoisted is shown. A rope 202 is hooked on a hook portion (not shown) of the lifting means of the hoisting mechanism, and the beam material 200 as the hoisting object is held by the rope 202. There is.

In this example, ring-shaped portions 202a are formed on both ends of the rope 202, and the other end is inserted into the ring-shaped portion 202a on one end side of the rope 202.
It is to be lifted by tightening.

Further, a steel member 204 shown in FIG.
For example, the same method as above is adopted when H-section steel is lifted.

However, when hoisting with the rope 202, the object to be hoisted is once lifted and the rope 20 is lifted.
Since it is necessary to perform the work of passing 2 through the lower side, there is a problem that in the case of a very heavy one, an extremely complicated work must be performed.

Further, in the conventional type using the lifting jig and the rope, it takes a long time to attach and detach, and there is a problem that it is extremely inconvenient when lifting a large number of objects to be lifted.

Therefore, such a lifting jig is
It is preferable that the object to be lifted is securely held and that the lifting symmetrical object and the lifting jig are easily attached and detached.

In view of the above-mentioned problems, for example, when the object to be lifted is a wooden member, an actual flat blade 4-100185 shown in FIG. 8 is used.
The hoisting jig of Japanese Patent Publication has been proposed. Further, as a proposal when the building member hoists a steel member such as an H-shaped steel, there is a hoisting jig as disclosed in Japanese Patent Application Laid-Open No. 5-8985 shown in FIG. 9 (A).

The conventional lifting jig 210 shown in FIG.
Claws 216 provided on the pair of arms 214a and 214b
By engaging a.216b with the locking holes 226a and 226b formed in the side surface of the wooden beam 224, the wooden beam 224 can be reliably held, and the bending bar 2
With the provision of 20, the holding state can be released by a simple operation of pulling the cord-like body 222 from below.

The conventional hanging tool 240 shown in FIG.
For the beam made of the H-shaped steel 230 composed of the upper and lower flange portions 232 and the web portion 234 connecting the upper and lower flange portions 232, the H-shaped steel 2 is formed by the U-shaped holding member 242.
The upper flange portion 232 is sandwiched between the upper flange portion 232 and the fastening bolt 244 of the holding member 242.
Is pressed to hold the H-shaped steel 230.

However, any of the above-mentioned lifting jigs 210 and 240 is an excellent proposal in that it holds the object to be lifted securely, but a manual operation is required when attaching and detaching the object to be lifted and the jig. I was trying.

Therefore, an object of the present invention is to simplify the on-site work without the need to manually clamp the object to be lifted with a hoisting jig when hoisting by the lifting means of the hoisting mechanism. While holding down, it is possible to hold the object to be lifted securely with an extremely simple work.
Another object of the present invention is to provide a lifting jig and a lifting method that can be removed.

[0015]

A hoisting jig according to a first aspect of the present invention is attached to an elevating means (for example, a member 1) of a hoisting mechanism to hold an object to be hoisted (for example, a member 2). A lifting jig (for example, a member 10) for supporting the lower surface of the lifting target and a first member (for example, member 12) that supports the lower surface of the lifting target and a pressing force applied to the upper surface of the lifting target. And a second member (for example, the member 20) for sandwiching the object by interposing the object between the first member and the first member, and the first member and the second member. The first and second members are supported in a state where the distance between the facing members is variable, and the lifting force by the lifting mechanism is converted into a force in the opposite direction and transmitted to the second member, Power transmission means for holding the object between them ( The example, if member 30), characterized in that it comprises a.

According to the invention described in claim 1, the following operations and effects (1) to (3) are obtained.

(1) The power transmission means can convert the lifting force into a force in the opposite direction, that is, a force for pressing the object from the upper surface, and transmit the force to the second member.

Thus, when the object to be hoisted is hoisted and moved, the object is placed on the first member and then only hoisted by the hoisting mechanism, and the object is held by the hoisting jig. An object can be moved to a desired position.

Therefore, it is not necessary to press the lifting object with the lifting jig by manual operation as in the prior art, the workability is improved, and the on-site work can be speeded up.

(2) In the power transmission means, the pressing force is not transmitted to the second member when the lifting force is not applied. That is, the first member is placed at a predetermined position,
Alternatively, by placing the target object at a predetermined position, the action of the lifting force is released and the target object is released from the sandwiched state.

As a result, even when the object is removed from the lifting jig after the object is moved to the desired position,
The object and the lifting jig can be removed only by placing the first member at the predetermined position or placing the object at the predetermined position.

Therefore, the work for removing the lifting jig and the object after moving the object becomes easy, and the workability is further improved.

(3) The power transmission means includes a first member and a second member.
Since the distance between the members facing each other can be varied, the lifting jig can be held on the object regardless of the size and height of the object.

A hoisting jig according to a second aspect of the present invention is the hoisting jig according to the first aspect, wherein the power transmission means is the first
Formed by a parallel link mechanism (for example, the member 30) having a fulcrum supported by the member, the first member guides the second member to move in a direction in which the facing distance is variable. The second member has a guided portion (for example, the member 24) that is engaged with the guide portion and is guided to move.

According to the second aspect of the present invention, the first member is provided with the fulcrum of the parallel link mechanism supported by the first member.
By engaging the guided portion of the second member with the guide portion of the member, the guided portion can be reliably guided in the direction in which the facing distance is variable.

A hoisting jig according to a third aspect of the present invention is the hoisting jig according to the second aspect, wherein the first member is formed with a stopper for locking the guided portion, and the stopper has a hoisting force. It is characterized in that the second member is positioned above the object when it does not work.

According to the third aspect of the invention, the stopper (for example, the member 40) is used when the lifting force does not act.
Thus, the second member can be positioned above the target object, and the target object can be easily attached and detached.

A hoisting jig according to a fourth aspect of the present invention is the hoisting jig according to the third aspect, wherein the stopper is a stopper piece (for example, the member 52) that is biased so as to project in a direction that restricts the movement of the guided portion. It is characterized in that the protruding tip portion of the stopper piece is formed with a downward taper surface (for example, the member 52a) that is tapered as it protrudes in the protruding direction.

According to the fourth aspect of the invention, the stopper piece, which is biased so as to project in the direction in which the movement of the guided portion is restricted, comes into contact with the tapered surface as the guided portion rises, and the stopper piece is retracted. Therefore, the guided portion can be set at a predetermined locking position without requiring manual operation.

According to a fifth aspect of the present invention, there is provided a lifting jig according to the third aspect, wherein the stopper is a stopper piece (for example, a member 4) that interferes with a movement path of the guided portion.
8), the stopper piece is supported by the first member so as to be driven and rotatable in a first direction as the guided portion rises, and the stopper piece is positioned below the guided portion. After that, a member for restricting rotation in a direction opposite to the first direction is provided on the first member.

According to the fifth aspect of the invention, the stopper piece that interferes with the movement path of the guided portion is allowed to move when the guided portion rises, and when the guided portion falls. Since the movement is restricted, the guided portion can be maintained at the predetermined height position of the first member without manual operation.

A hoisting method according to a sixth aspect of the present invention is a hoisting method for hoisting an object to be hoisted between first and second members of a hoisting jig attached to the elevating means of the hoisting mechanism. And the step of placing the lower surface of the object to be hoisted by the first member, hoisting the elevating means, transmitting a force in a direction opposite to the hoisting force to the second member, and Pressing a member against the upper surface of the target object to hold the target object.

According to the sixth aspect of the invention, the lifting force can be converted into a force in the opposite direction, that is, a force for pressing the object from the upper surface, and can be transmitted to the second member, and the object to be lifted can be lifted and moved. At this time, the object can be held in a lifting jig and moved to a desired position simply by placing the object on the first member and then lifting it by a lifting mechanism.

Therefore, it is not necessary to manually attach the hoisting object and the hoisting jig as in the prior art, the workability is improved, and the on-site work can be speeded up.

A hoisting method according to a seventh aspect of the present invention is the hoisting method according to the sixth aspect, wherein the holding state of the object is released as the hoisting force is released, and the second member is an upper surface of the object. And a step of further separating.

According to the seventh aspect of the invention, the pressing force is not transmitted to the second member when the lifting force is not applied.

Thus, even when the object is removed from the lifting jig after the object is moved to the desired position,
The object and the lifting jig can be removed only by placing the first member at the predetermined position or placing the object at the predetermined position.

Therefore, when the lifting jig and the object are removed after the object is moved, no special work is required, and the workability is further improved.

[0039]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be specifically described below with reference to the drawings.

First, the overall structure of this embodiment will be described with reference to FIGS. 1A and 1B are views showing a lifting jig, where FIG. 1A is a right side view and FIG. 1B is a front view. FIG.
[Fig. 4] is a back view showing a lifting jig.

As shown in FIGS. 1A and 1B and FIG. 2, the hoisting jig 10 is attached to a hoisting mechanism (not shown), for example, a wire 1 as an elevating means of a crane, and a hoisting object such as a beam 2 is attached. And a parallel link mechanism 30 as a power transmission means, which has a function of sandwiching and lifting the connection member 11, the first member 12, the second member 20, and
It is configured to include.

The connecting portion 11 is a ring-shaped steel member attached to the uppermost end of the parallel link mechanism 30 and having a function of connecting the lifting jig 10 itself and the elevating means 1.

Then, the first member 12 is brought into contact with the lower surface of the object 10 to support the object 10, and the second member 20 is brought into contact with the upper surface of the object 10 to apply a pressing force. ,
Hold the object 2.

[1] Power Transmission Means Here, the specific features of the parallel link mechanism 30 as the power transmission means, which is a characteristic configuration of the present invention, are shown in FIG.
This will be described with reference to FIG.

Parallel link mechanism 30 as power transmission means
As shown in FIG. 1 (B), the second member 20 is interposed between the object 2 and the elevating means 1 to support the second member 20, and simultaneously has the following two functions. is there. A function of converting a lifting force by a lifting mechanism (not shown) into a force in the opposite direction and transmitting it to the second member 20 A function of varying the facing distance between the first member 12 and the second member 20. In the embodiment, the components of the parallel link mechanism 30 are the first fulcrum 32-1, the second fulcrum 32-2,
Third fulcrum 32-3, fourth fulcrum 32-4, fifth fulcrum 32-5, sixth fulcrum 32-6, seventh fulcrum 32-7,
The first link 34-1, the second link 34-2, the third link 34-3, the fourth link 34-4, the fifth link 34-5, and the sixth link 34-6 are configured. ing.

Each of the first to sixth links 34-1 to 34-6
Is an arm-shaped member made of steel, for example, and through-holes are bored at both ends which are fulcrums. Each link is rotatably supported by the fulcrum by, for example, inserting a bolt into the through hole and screwing it into a nylon nut through a washer to form each fulcrum.

In particular, the third and fourth links 34-3 and 34
-4 has a length approximately twice that of each of the other links,
Each link 34-3 in the area that divides the length of the link into approximately two
-Through holes larger than those of other fulcrum points are bored so that 34-4 intersect and the intersecting portion is rotatably formed. In addition, the fourth fulcrum 32 which is the intersection area
In order to have a function as a supporting fulcrum for supporting the entire parallel link mechanism 30, -4 is formed such that the link is thicker and the members such as bolts are larger than the other fulcrum points.

The first fulcrum 32-1 has a parallel link mechanism 3
It is formed at the uppermost end of 0, and unlike other fulcrums, it is not configured by fastening with bolts or the like, and a ring as a connecting portion 11 that can be connected to the wire 1 can be attached.
Then, for example, the ring can be rotatably supported by inserting the ring into the through hole formed in the end portion of one link and the through hole formed in the other link.

The seventh fulcrum 32-7 formed at the lowermost end of the parallel link mechanism 30 is formed so as to be able to support the second member 20 in addition to the link.

The parallel link mechanism 30 having six links and seven fulcrums having the above characteristics is shown in FIG.
It has a structure as shown in FIG.

Next, the operation of the parallel link mechanism 30 as the power transmission means will be described.

<1> Operation of Holding Object 2 As shown in FIG. 1 (B), if upward lifting force F ₁ is applied at the first fulcrum 32-1, the second and third The inward force F ₂ is generated at the fulcrums 32-2 and 32-3 of the
An inward force F ₃ is generated at the sixth fulcrums 32-5 and 32-6, and a downward pressing force F ₄ is generated at the seventh fulcrum 32-7.

Therefore, since the lifting force can be converted into a force in the opposite direction by the parallel link mechanism 30, only by applying the lifting force, the second member 20 is brought into contact with the upper surface of the object 2 to narrow the object 2. Can have.

<2> Operation for releasing the holding state On the contrary, if a downward force F ₅ is applied at the first fulcrum 32-1, the second and third fulcrums 32-2, 32-3 are applied. And a force in the direction opposite to that of F ₂ is generated, and the fifth and sixth fulcrums 32-5
-At 32-6, a force in the opposite direction to the above F ₃ is generated, and at the seventh fulcrum 32-7, an upward force F ₆ is generated.

By the way, when the hoisting mechanism is not hoisted, that is, any upward force F _{1 is applied} to the first fulcrum 3
When not given to 2-1 the seventh fulcrum 32-
7, the upward force F ₆ is generated.

That is, when the lifting force F ₁ is not applied, the weight of the area above A ₁ -A ₂ shown in FIG. 1B is the weight of the rope 1 and the connecting portion 11 as the lifting means. Therefore, if the weight is lower than the weight of the area below A ₁ -A ₂ , the downward force F ₅ is naturally applied to the first fulcrum 32-1. Therefore, in a normal left state, no force to be sandwiched is generated between the first and second members 12 and 20, and for example, the link as shown by the dotted line in FIG. In the contracted state, the facing distance between the first and second members 12 and 20 is longer than the height of the object 2, and a space can be secured when attaching and detaching the object 2 and the lifting jig 10. .

This is advantageous for removing the lifting jig 10 from the object 2 after moving the object 2 to a desired position. That is, when the target object 2 reaches a predetermined position and the rope is lowered, the target object 2 is automatically released from the holding force because it is released from the lifting force F _{1 of the} lifting mechanism. It is possible to remove the hoisting jig 10 and the lifting jig 10 without manual operation.

Further, as shown in FIG. 1B, since the first to sixth links 34-1 to 34-2 are formed in a pantograph shape, they can be expanded and contracted in the vertical direction and the force F ₁ Depending on the presence or absence, the length between the first fulcrum 32-1 and the seventh fulcrum 32-7 can be freely adjusted, and the second member 20 formed below the seventh fulcrum 32-7, It is possible to adjust the distance between the first member 12 and the first member 12 in the range of the length L according to the height of the object 2. The length of L is, for example, 2
About 20 mm is preferable.

Although the parallel link mechanism 30 has six links and seven fulcrums in the present embodiment, it may have at least parallel links.

In addition to the parallel link mechanism, any means may be used as long as it has a structure or a function capable of simultaneously achieving the above-mentioned functions. A structure in which a plurality of links and fulcrums of other forms are combined, and a plurality of parallel links are used. It may be a combination of mechanisms in parallel or series, or the like.

Further, the power transmission means is not limited to the parallel link mechanism, and other mechanically controllable mechanism may be mounted.

[2] Guide portion and guided portion Next, the first member 12 and the second member 20 will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1, the first member 12 has a function of supporting the object 2 while contacting the lower surface of the object 2 to be lifted and receiving the weight of the object 2, and the sandwiching piece 13. The connection fixing part 14 and the guide part 16 are included.

The sandwiching piece 13 has a function of directly receiving the object 2, and its receiving surface preferably has a shape corresponding to the shape of the lower surface of the object 2 (for example, a modification shown in FIG. 6). It may be shaped like). As shown in FIG. 1A, an elastic sheet 13a is provided on the receiving surface of the sandwiching piece 13 by fixing it with a plurality of, for example, four rivets (not shown). It has a function of preventing damage when it is attached to and detached from the sandwiching piece 13.

A supporting piece 13c is bent and formed at one end of the holding piece 13 which is not connected to the second member 20 to surely support the object 2 and to drop the object due to rolling or the like during lifting. Is being prevented.

Further, as shown in FIG. 1B, a plurality of, for example, two support plates 13b are provided side by side on the outer edge of the holding piece 13, so that the lifting jig 10 can be stably placed. You can

The connecting and fixing portion 14 fixes the fourth fulcrum 30-4 of the parallel link mechanism 30 to the extending end of the extending region 15 extending vertically from the lower end region of the object to be lifted 2. And has a function of connecting and supporting the parallel link mechanism 30. Then, for example, a through hole through which the shaft of the bolt can be inserted is formed, and the bolt penetrates through the through hole of the link formed at the position of the fourth fulcrum 32-4 and is screwed and fastened to the nut to form a parallel link mechanism. The link 30 is supported in a rotatable state.

The guide portion 16 is formed in the extended region 15 between the connecting and fixing portion 14 and the upper surface region of the object 2, and the second portion is formed.
It has a function of guiding and guiding a guided portion 24 (described later) of the member 20 so that it can be inserted vertically in the vertical direction.

The second member 20 abuts the upper surface of the object 2 to apply a pressing force to the object 2, and the object 2 is interposed between the second member 20 and the first member 12 to hold the object 2 therebetween. It has a function to perform, and is configured to include the contact portion 22 and the guided portion 24.

The abutting portion 22 is the seventh of the parallel link mechanism 30.
Has a function of contacting the upper surface of the object 2 by being formed below the fulcrum 32-7. As shown in FIG. 1A, an elastic sheet 23 is provided on the contact surface of the contact portion 22 by fixing it with a plurality of, for example, four rivets (not shown). Can be prevented from being damaged when being attached to or detached from the contact surface. The fulcrum of the seventh fulcrum 32-7 and the contact portion 22 are supported by a pair of support pieces 21.

The guided portion 24, as shown in FIGS. 1A and 2, has a parallel link mechanism 3 from the seventh fulcrum 32-7.
It has a function of projecting in a direction orthogonal to the parallel plane of 0 and guiding the abutting portion 22 to move vertically.

The specific configuration is, for example, the link 34-5.
34-6 rotatably supports the respective end portions of the support member 34-2.
The guide portion 16 of the first member 12 and the first member 12 are inserted by the spring pin 25. Then, one end of the spring pin 25 on the guide portion 16 side is fixed by the pin 26, and the support piece 21
One end on the side is fixed with a snap pin 27. By doing so, the second member 20 can be stabilized in the suspended state and the guided portion 24 can be locked to the guide portion 16 while the link is rotatable.

Then, by inserting the collar 28 between the first member 12 and the second member 20 on the spring pin 25, the parallel plane of the parallel link mechanism 30 and the extension of the first member 12 are extended. The distance from the installation area 15 is maintained. As a result, the first member 12 and the second member 20 are constantly facing each other, so that the parallel link mechanism 30 does not tilt in the arrow Z direction shown in FIG. Never.

Thus, the guided portion 24 and the guide portion 1
By engaging with 6, the guided portion 24 can be reliably guided in the direction in which the facing distance is varied.

Further, unlike the prior art, it is not necessary to manually adjust the height position of the object 2, so that the work can be simplified and speeded up.

[3] Stopper Next, the stopper will be described with reference to FIGS. 2, 4 and 5.

As shown in FIG. 2, the first member 12 has
A plurality of stoppers 40, for example, one stopper 40, which can lock the guided portion 24 with the second member 20 in contact with the upper surface of the object 2 when the lifting force is not applied, are formed.

As shown in FIG. 4, the stopper 40 has a rotation direction θ ₁ (first direction) and a rotation direction θ ₂ in which the rotation is restricted to such an extent that the guided portion 24 cannot move. It is a rotating mechanism.

Specifically, the stopper 40 is, as shown in FIGS. 2 and 4 (A) (B) (C), the stopper 4
A rotation shaft 42 that is rotatably formed at the 0 formation position and serves as a rotation center, and a first stopper piece 46 and a second stopper piece that project from the rotation shaft 42 at both ends in the rotation radius direction. 48
And a fixing rod 44 as a member for restricting rotation parallel to the protruding direction of the rotation shaft 42 in the rotation region of the first stopper piece 46 and the second stopper piece 48. Set up.

In the normal state of the stopper 40, the first stopper piece 46 is always locked to the fixed rod 42, and
The stopper pieces 48 are in a state of interfering with each other on the guide portion 16, that is, on the ascending / descending path of the guided portion 24.

The reason is that the second stopper piece 48 is
It is configured to have a shape slightly larger than the first stopper piece 46, or the second stopper piece 48 and the first stopper piece 48.
Since the member 12 of FIG. 4 is biased by a spring or the like (not shown), even if the first stopper piece 46 is separated from the fixing rod 44 as shown in FIG. _This is because the rotation recoils like ₂ .

Next, the operation will be described with reference to FIGS.

When the guided portion 24 abuts on the second stopper piece 48 so as to raise the guided portion 24 by a minute distance and push upward from the bottom as shown by an arrow U shown in FIG. 4 (A). , The second stopper piece 48 is also in the same direction (see FIG.
(A) Arrow U) pushes the stopper 40 itself around the rotation shaft 46 (arrow θ _{1 in} FIG. 4A), and the second stopper piece 48 of the guided portion 24. It will be evacuated from the ascending / descending movement route.

Then, in the region near the position where the stopper 40 is arranged, the guided portion 24 is inserted through the guide portion 16 and immediately after that, the guided portion 24 passes through the position where the stopper 40 is arranged, and the spring is immediately opened. The second stopper piece 48 moves in a direction opposite to the rotation direction (see FIG.
(B) Rotate to θ ₂ ) and the second stopper piece 48 again interferes with the vertically moving path of the guided portion 24.

At this time, the guided portion 24 is just placed on the second stopper piece 48, and the lowering of the guided portion 24 can be regulated by the second stopper piece 48.

Thus, the second stopper piece 48 is
By interfering with the movement path of the guided portion 24, the movement of the guided portion 24 can be restricted, and the guided portion 24 can be prevented from falling. Therefore, by forming the stopper 40 on the lifting jig 10, the second member 20 can be positioned above the object 2 when the lifting force does not act.

Therefore, when the object 2 is hoisted and the object 2 is placed at a predetermined position in the high area of the building, a manual operation for separating the object 2 from the hoisting jig 10 is required. Workability is improved without the need for special work.

The stopper 40 may be any mechanical means as long as it can lock the guided portion 24 to the guide portion 16. For example, as a modified example, the stopper 50 shown in FIG.

The stopper 50 is shown in FIGS. 2 and 5 (A).
As shown in (B) and (C), the stopper piece 52 includes a stopper piece 52 that is urged to protrude in a direction that restricts the movement of the guided portion 24. As shown in FIG. 5A, the stopper 50 includes a fixing portion 51 having an insertion hole 51a fixed to the first member 12 and the insertion portion 51a. And a stopper formed so as to be insertable into the hole 51a.

Then, as shown in FIG. 5B, the stopper piece 52 and the fixed portion 51 are urged by the elastic member 54 in the insertion hole 51a. Further, as shown in FIG. 5 (A), the insertion portion 51 is provided with fixing holes 51c and 51d for fixing to the first member 12, and the stopper piece 52 can be manually operated. A slit 51b is provided on the side surface so that a manual rod 52b protruding from the piece 52 can be inserted and moved.

As described above, since the stopper 50 is provided with a mechanism capable of projecting and biasing, if the tapered surface 52a is formed as described above, the guided portion 24 is raised by a minute distance, and as shown in FIG. As indicated by an arrow U shown in FIG. 5B, the stopper piece 52 is retracted as indicated by an arrow X ₁ shown in FIG. Then, in the region near the position where the stopper 50 is provided, the guided portion 24 is inserted through the guide portion 16, and immediately after that, as soon as the guided portion 24 passes the position where the stopper 50 is provided, the stopper piece 52 is pulled out. 5 drawn as arrows X ₂ of (C), the will form the guided portion 24 is placed on the stopper piece 52, is regulated by the stopper piece 52 downward of the guide portion 24, the guided portion 24
Can be prevented from falling.

[4] Lifting Method Next, a method of lifting the object 2 using the lifting jig 10 will be described with reference to FIGS. 1 to 3.

First, as shown in FIG. 3A, the object 2 is placed on the first member 12. When the object 2 is long, a plurality of lifting jigs 10 may be arranged in parallel along the longitudinal direction of the object 2. At this time, even if the lifting force is not applied, the contact surface of the lower surface of the second member 20 is not in contact with the upper surface of the object 2 because of the reason <2> above.

Next, as shown in FIGS. 3B and 3C, the parallel link mechanism 30 is lifted and operated at the same time, and the object 2 is held and moved.

This process will be described in detail. First, FIG.
As shown in, the parallel link mechanism 30 operates at the same time as the lifting force acts, and the lower surface of the second member 20 contacts the upper surface of the object 2. Then, almost at the same time, FIG.
As shown in. At this time, for the reason of <1> above, the object 2 can be fixed to the hoisting jig simply by hoisting.

Then, as shown in FIG. 3D, the object 2 is placed at a predetermined position.

Immediately after this, as shown in FIG. 3 (E), the lifting force is released and the object 2 is released due to the reason <2>.
Is released, and the first member 12 moves downward from the initial state (FIG. 3D). Then, with the movement, the second member 20 relatively moves upward, and the guided portion 24 of the second member 20 is locked to the stopper 40 described above.

Then, the lifting jig 10 is removed from the object 2. At this time, the stopper 40 does not cause the second member 20 to drop downward, and the first member 12 moves far below the object 2 as shown in FIG. The supporting piece 13c shown in (A) and the lower surface of the object 2 do not interfere with each other, and the lifting jig 10 can be removed smoothly.

As described above, according to the example of the embodiment of the present invention, the following effects are obtained.

(1) When the object to be hoisted by the hoisting jig is hoisted, the object is placed on the first member and then only hoisted by the hoisting mechanism to fix the object to the hoisting jig. be able to. Therefore, when hoisting by the lifting mechanism of the hoisting mechanism, it is not necessary to press the hoisting object with a hoisting jig by manual operation as in the past, and it is possible to simplify the on-site work while ensuring the work Can be held.

(2) By placing the first member at a predetermined position or the target object at a predetermined position by the power transmission means, the action of the lifting force is released and the target object is held. Since it is released from the force, even when the object is removed from the lifting jig after the object is moved to the desired position, the first
The object and the hoisting jig can be removed only by placing the member in a predetermined position or placing the object in a predetermined position.

Therefore, it is easy to remove the lifting jig and the object after moving the object.

(3) The power transmission means includes the first member and the second member.
Since the distance between the members facing each other can be varied, it is possible to hold the suspender on the object regardless of the size and height of the object.

(4) While the parallel link mechanism is supported by the first member, the guided portion of the second member is engaged with the guide portion of the first member to oppose the guided portion. It is possible to reliably guide in the direction in which the distance changes.

(5) By forming the stopper on the lifting jig, the second member can be positioned above the object when the lifting force does not act.

Although the apparatus and method of the present invention have been described in accordance with some specific embodiments thereof, those skilled in the art can practice the invention as described in the text of the present invention without departing from the spirit and scope of the invention. Various modifications can be made to the form. For example, as shown in FIG. 6, the shapes of the first member 62 and the second member 70 may be modified to have a semicircular cross section depending on the shape of the object to be lifted.

As shown in FIGS. 10A and 10B,
It may be deformed. A lifting jig 10 of a modified example shown in FIG.
0 is that the upper connection fitting 102 is interposed between the <i> connecting portion and the parallel link mechanism, as compared with the above embodiment,
<Ii> In the second member 110, the urging member 116 is interposed between the pair of support pieces 112 and the contact portion 114, and the second guided guide is provided on the first member side of the contact portion 114. The point where the portion 118 is formed to project toward the guided portion (thus, the length of the guide portion in the longitudinal direction also extends downward from the above embodiment), and <iii> the contact of the second member 110. The difference is that a protruding piece 114a is formed on the side opposite to the side where the first member is located from the contact portion 114.

Therefore, the point <i> enables the parallel link mechanism and the connecting portion to be firmly connected. <Ii
Due to the point>, the second guided portion 118 eliminates the displacement in the lateral direction (arrow Z in FIG. 10) during the operation of the parallel link mechanism, and the lateral force acts entirely downward by the guide portion. As compared with the above-mentioned embodiment, it is possible to more reliably and strongly apply a pressing force to hold the lifting jig. Further, by the biasing member 116,
Even if the parallel link mechanism retreats upward, the pressing force is not released immediately, so that even if the object to be lifted is placed, it does not come off immediately and the workability is improved. <Ii
Due to the point i>, the object to be lifted can be held more securely by the protruding piece 114a.

Further, when the stopper is formed by the rotation mechanism, it is not limited to that shown in FIG. 4, but the direction of rotation and the direction in which rotation is restricted to the extent that the guided portion cannot move. , May be used, and may be a crushing feed mechanism, for example, a combination of a ratchet wheel and a feed bar, and a presser bar further attached to prevent reverse rotation.

[0110]

According to the first aspect of the present invention, the workability is improved without any special work such as the conventional work of pressing the object to be lifted with the hoisting jig, and the on-site work is improved. Can be accelerated. Further, the work for removing the lifting jig and the object after moving the object becomes easy, and the workability is further improved. Further, since the power transmission means can change the facing distance between the first member and the second member, the lifting jig can be held on the object regardless of the size and height of the object. .

According to the second aspect of the invention, the guided portion can be reliably guided in the direction in which the distance between the facing portions is variable.

According to the third aspect of the invention, the second member can be positioned above the object by the stopper when the lifting force is not applied, and the object can be easily attached and detached. it can.

According to the fourth aspect of the invention, the stopper piece comes into contact with the tapered surface as the guided portion rises,
Since the stopper piece is retracted, the guided portion can be set at a predetermined locking position without requiring manual operation.

According to the fifth aspect of the invention, the stopper piece allows movement when the guided portion rises,
Since the movement is restricted when the guided portion is lowered, the guided portion can be maintained at the predetermined height position of the first member without manual operation.

According to the invention described in claim 6, it is possible to improve workability and speed up on-site work without requiring the conventional work of attaching the lifting object and the lifting jig by manual operation. .

According to the invention as defined in claim 7, no special work is required when removing the lifting jig and the object after moving the object, so that the workability is further improved.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of an embodiment of a hoisting jig of the present invention, (A) showing a right side view and (B) showing a front view.

FIG. 2 is a rear view showing the lifting jig of FIG.

FIG. 3 is a front view showing a hoisting method using the hoisting jig shown in FIG. 1, in which (A) → (B) → (C) → (D) →
Each process of (E) is shown.

FIG. 4 is a front view showing a stopper portion of the lifting jig of FIG. 1, showing steps (A) → (B) → (C).

5A and 5B are views showing a modified example of the stopper portion of the lifting jig of FIG. 1, in which FIG. 5A is a perspective view, and FIGS.
[Fig. 3] is a front view showing each step.

FIG. 6 is a right side view showing another embodiment of the lifting jig of the present invention.

7A and 7B are perspective views showing an embodiment in which conventional lifting is performed, in which FIG. 7A shows a wooden beam and FIG. 7B shows a steel beam.

FIG. 8 is a perspective view showing another conventional lifting jig.

9A and 9B are views showing still another conventional lifting jig, in which FIG. 9A is a perspective view and FIG. 9B is a perspective view showing a lifting object.

10A and 10B are views showing a further modified example of the lifting jig of FIG. 1, in which FIG. 10A is a front view and FIG. 10B is a right side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lifting means 2 Lifting target 10 Lifting jig 11 Connecting part 12 1st member 16 Guide part 20 2nd member 24 Guided part 30 Parallel link mechanism as a power transmission means 32-4 (support) fulcrum 40 Stopper 42 Rotating shaft 44 Fixing rod 46 First stopper piece 48 Second stopper piece 50 Stopper 52a Tapered surface

Claims (7)

[Claims] 1. A lifting jig, which is attached to an elevating means of a lifting mechanism and holds a lifting target while holding the lifting target, the first member supporting a lower surface of the lifting target, and the lifting target. A second member for abutting the upper surface of the object to apply a pressing force to the object and for sandwiching the object by interposing the object between the first member and the first member; And supporting the first and second members in a state in which the facing distance between the first member and the second member is variable, and
And a power transmission means for converting the lifting force of the lifting mechanism into a force in the opposite direction and transmitting the force to the second member so as to hold the object between the opposing members. . 2. The power transmission means according to claim 1, wherein the power transmission means is formed of a parallel link mechanism having a fulcrum supported by the first member, and the first member is configured to reduce the distance between the facing members. A lifting jig, comprising: a guide portion that moves and guides the second member in a variable direction, and the second member includes a guided portion that is guided to move by being engaged with the guide portion. Ingredient 3. The stopper according to claim 2, wherein the first member is formed with a stopper that locks the guided portion, and the stopper is provided above the object when the lifting force is not applied. Lifting jig characterized by locating the above member. 4. The stopper according to claim 3, wherein the stopper includes a stopper piece that is biased to project in a direction that restricts the movement of the guided portion, and a protruding tip portion of the stopper piece projects in a projecting direction. The lifting jig is characterized in that a downward taper surface is formed which tapers in accordance with the above. 5. The stopper according to claim 3, wherein the stopper has a stopper piece that interferes with a movement path of the guided portion, and the stopper piece is driven to rotate in a first direction as the guided portion rises. A member that is supported by the first member as much as possible and that restricts rotation in a direction opposite to the first direction after the stopper piece is positioned below the guided portion is the first member. A lifting jig characterized by being provided. 6. A hoisting method for hoisting an object to be hoisted between first and second members of a hoisting jig attached to an elevating means of a hoisting mechanism, wherein the lower surface of the object to be hoisted is said A step of placing the first member on the second member, lifting the elevating means, transmitting a force in a direction opposite to the lifting force to the second member, and pressing the second member against the upper surface of the object. And a step of holding the object, the lifting method comprising: 7. The method according to claim 6, wherein the holding state of the target object is released in association with the release of the lifting force, and the second member is separated from the upper surface of the target object. Characteristic lifting method.