JPH03264494A - Lifter - Google Patents

Abstract

PURPOSE:To improve workability and safety of lifting, transportation and transfer of various articles by making a structure to lift a lifting thing by way of providing nipper pieces on the front edges of right and left cross beams, bringing the nipper pieces into contact with the inside of the lifting thing and pressure-nipping the lifting thing with its dead weight. CONSTITUTION:A lifter preliminarily sets a span L1 of nipper pieces 9A, 9B in accordance with the size of a U-shaped gutter 8 to lift, brings those nipper pieces 9A, 9B into contact with the inside of the U-shaped gutter 8 and when the U-shaped gutter 8 is lifted up as it is, a longitudinal beam 1 and a right cross beam 2 function as a lever by the dead weight of the U-shaped gutter 8. Subsequently, a pivotal supporting point 6A works as a working point and a pivotal supporting point 6B works as a supporting point, and accordingly, a strong nipping force P is generated in the direction to expand the span L1 of the nipper pieces 9A, 9B, and the U-shaped gutter 8 is lifted up by the nipping force P. Thereafter, when the U-shaped gutter 8 is put down at a specific position, this work is cancelled due to the cancellation of the dead weight, and the nipper pieces 9A, 9B are freely removed.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention is applicable to concrete U-shaped gutters for street gutters, concrete street gutter covers for the street gutters, long iron materials, and other materials and equipment. The present invention relates to lifting tools for various articles, which are used to lift, transport, and arrange objects in predetermined positions.

"Conventional technology" Cranes and tow trucks are generally used at construction sites and construction materials storage sites to lift and move various heavy materials, to lift and install them in designated positions, and to load and unload them. Predetermined work is carried out by lifting various materials using arbitrary lifting tools.

And - In terms of numbers, many lifting wires are used, which can be used for lifting objects of various shapes, and the lifting wire is wound around the U-shaped groove etc. each time to lift the object, and the wire is removed after the lifting movement. Work is being done.

On the other hand, in the case of a concrete U-shaped groove that has a specified common shape, a structure that utilizes the common shape and has a pressure contact leg that presses against the inside of the U-shaped groove by a lifting force, or a lifting A special lifting device is used that has an L-shaped lifting piece that holds the bottom corner of the object.

``Problems to be Solved by the Invention'' Among the above conventional means, the former lifting wire means requires work to wind and unwind the wire for each object to be lifted, and The work of passing the wire through and removing it from the grounded U-shaped groove is extremely complicated and inefficient, and if there is a defect in the wire winding, there is a risk of it slipping off during lifting. .

On the other hand, although the latter specialized lifting tool can improve workability by omitting the above-mentioned wire work, there is a risk of it falling due to some kind of shock during lifting, and it is not suitable for lifting long objects. There are problems such as the troublesome work of accurately inserting and removing the L-shaped lifting piece under the object to be lifted using a crowbar.

The present invention provides a novel lifting device that overcomes one or more of the drawbacks of conventional means.

``Means for Solving the Problems'' The lifting tool of the present invention that solves the above technical problems has an inverted shape in which the right horizontal piece and the vertical piece intersect at an obtuse angle, or the left horizontal piece and the vertical piece intersect at an acute angle, and a vertical beam having a lifting part at the upper end;
It consists of a combination of a right cross beam that is pivotally supported below the vertical beam and whose downward rotation is restricted, and a left cross beam that is pivotally supported above the right cross beam and whose downward rotation is restricted. A clamping piece is provided at the front end of the right cross beam, and the pair of clamping pieces on the left and right are brought into contact with the inside of the object to be lifted, such as a U-shaped lecture hall, and the weight of the object to be lifted presses the clamping pieces and lifts the object. The gist is "Structure" and "the longitudinal beam and the transverse beam consist of a tightening rod provided between the longitudinal beam and the transverse beam, or a wedge body that is removably inserted into the inner part of the intersection of the longitudinal beam and the transverse beam. The lifting tool of the first invention has an embodiment in which the right horizontal piece and the vertical piece intersect at an obtuse angle, or the left horizontal piece and the vertical piece form an inverted shape with an acute angle intersection, and , consisting of a vertical beam having a lifting part at the upper end, and a horizontal beam that is pivotally supported below the vertical beam and restricts downward rotation, and a clamping piece is provided opposite to the lower ends of the vertical beam and the horizontal beam. The gist of the invention is "a structure in which the vertical beam and the horizontal beam are connected to each other," and "the longitudinal beam is composed of a binding iron provided between the vertical beam and the horizontal beam, or a wedge body that is removably inserted into the inner part of the intersection between the vertical beam and the horizontal beam. ``Tension locking means for cross beams'' or
The lifting tool of the second invention has an embodiment in which "a buoyant force releasing means is provided in which the cross beam and the wedge body are provided with a float having a required buoyancy"; and "the lifting tool of the second invention". In the fixture, the horizontal pieces of the vertical beams are connected in a removably connected structure, and the supporting part is connected to the tip of the horizontal piece in a manner that intersects with the horizontal piece and is removably connected, and also has a lifting part that can be freely attached. A lifting device according to a third aspect of the invention, which has a structure of a combination beam structure with horizontal pieces. The above is the configuration.

"Function" In the lifting tool of the first invention, when the pair of clamping pieces are applied to the inside of the object to be lifted such as a U-shaped groove and lifted up, the vertical beam and the horizontal beam function as "levers" due to the weight of the object to be lifted. Since these pivot points act as points of action and force, a strong clamping force is generated in the pair of clamping pieces in the direction of expanding the span, and the object to be lifted is lifted as is by the clamping force.

If the article is unloaded as it is, the clamping force disappears due to the elimination of its own weight, and the clamping piece becomes loose, making it extremely easy to lift and unload the article. When the tightening and locking means of the embodiment described above is provided, the clamping force is stabilized, so there is no risk of dropping or shifting due to impact during lifting, and the lifting action is extremely stable.

In addition, in the lifting tool of the second invention, when a rectangular plate object or the like is held up with the clamping pieces and pulled up, the vertical beam and the horizontal beam both act as "levers".
The pivot point and clamping piece act as a fulcrum and point of action,
Since a clamping force is generated in the pair of clamping pieces to shorten the clamping span, the same effect as in the first invention is obtained. In the above-mentioned embodiment in which the float body is provided, when the suspended object is placed in water, the float body floats up and automatically loosens the clamping piece.

Further, in the lifting tool having an assembly beam structure according to the third invention, the horizontal piece and the auxiliary horizontal piece are combined and connected to form a pair of clamping pieces one above the other, and the lifting part is positioned above the clamping piece. This allows rectangular plate objects to be hung vertically or diagonally.

"Example" Hereinafter, a detailed explanation will be given based on an example. First, with reference to FIG. 1 showing the lifting tool of the first invention, the right horizontal piece 10
and the vertical piece 12 intersect at an obtuse angle 01, and the vertical beam 1 has a lifting part 5 on the upper part, and is pivoted at a pivot point 6A at the lower end of the vertical beam 1 in a manner that intersects with the vertical beam 1, and rotates downward. The stopper 7
The right cross beam 2 is regulated by the right cross beam 2, and the left cross beam 3 is pivotally supported at a pivot point 6B located above the right cross beam 2, intersecting with the vertical beam 1, and whose downward rotation is restricted by a stopper 7. The main part is formed, and at the tips of the right cross beam 2 and the left cross beam 3, a clamping piece 9A9B having a clamping surface 14 orthogonal to the center line 2A of the right cross beam 2 and the center @3A of the left cross beam 3 is formed.
is provided. Then, apply the clamping piece 9A9B to the inside of the concrete iJU-shaped groove 8, hook the lifting part 5 to the hook of the crane car, pull it up, and clamp it by the weight of the U-shaped groove 8). It is designed to be crimped to the inside of @8 and lifted as is.

Specifically, in order to stabilize the center of gravity for lifting and the "leverage effect" when lifting, the vertical beam 1 has an inverted shape with the right horizontal piece 10 at the upper end, and the L-shaped angle is made obtuse. The lifting part 5 is opened slightly downward, and the lifting part 5 can be set at any position where gravity is balanced by sliding it on the right horizontal piece 10.

As shown in FIG. 1(B), the right cross beam 2 is made of a plate material that is sandwiched between the square vertical beams 1, and has an advance/retreat shaft 13 between the plates. The piece 9A is attached replaceably, and the clamping surface 14 of the clamping piece 9A is attached to the right cross beam 2.
It is perpendicular to the center line 2A of.

The right horizontal beam 2 is restricted from rotating downward in the figure by a stopper 7 at the lower end of the vertical beam 1, and the inside of the lower end of the vertical beam 1 has an arc shape as shown by the dotted line in the figure.

The vertical beam 1 and the right horizontal beam 2 can be folded by rotating relative to each other in the direction of arrow A in the figure.

Furthermore, the forward/backward shaft 13 of this embodiment has several locking holes 15A.
is installed through the U-shaped groove 8, and when the locking pin 16 is fitted by aligning the locking hole 15A with the locking hole 15B of the right cross beam 2 according to the standard size of the U-shaped groove 8, the span of the clamping piece 9A9B is L□ can be adjusted and set with one touch.

On the other hand, as shown in FIG. 1(C), the left cross beam 3 is made of a plate shape that sandwiches the vertical beam 1, and its downward rotation is restricted by a stopper 7, and a clamping surface perpendicular to the center line 3B. A clamping piece 9B having a number 14 is attached in a replaceable manner. In addition,
The clamping surface 14 of the clamping piece 9A9L3 is provided with a high-friction rubber lining, etc., and between the pivot points GA6B,
There is a distance L2 necessary for "leverage" which will be described later. Note that 17 in the figure is a positioning stopper.

The above-mentioned lifting shell of the embodiment shown in FIG.
is set in advance, the clamping piece 9A9B is brought into contact with the inside of the U-shaped groove 8, and then lifted as it is.

Due to the weight of the U-shape s8, the vertical beam 1 and the right horizontal beam 2 function as a "lever", the pivot point 6A acts as an action, and the pivot point 6B acts as a fulcrum, so there is a strong force in the direction of expanding the span L□ of the clamping piece 9A9B. A clamping force P is generated, and the U-shaped groove 8 is lifted by the clamping force P. Then, when the U-shaped m8 is lowered into a predetermined position, the "lever" effect is eliminated due to the elimination of its own weight, and the clamping piece 9
A9B can be removed at will.

Next, embodiments of the first invention will be described with reference to FIGS. 2 to 5. First, the embodiment shown in FIGS. 2 and 3 is intended to improve the stability of the lifting action of the embodiment shown in FIG.
913 is provided with a tightening locking means for the clamping position.

First, the lifting tool shown in FIG. 2(A) has the same vertical beam 1 and left and right horizontal beams 2 and 3 as in the first illustrated embodiment.
A tightening rod 19 having a turnbuckle 18 is provided between the longitudinal beam 1 and the right cross beam 2, and the clamping piece 9A9I3 is attached to the U
When it is clamped and crimped inside the groove 8, the turnbuckle 18 is tightened to tighten and lock the intersecting posture of the vertical beam 1 and the right horizontal beam 2.

In addition, the ones in Figure 2 (B) and (C) have a vertical beam 1 and a right horizontal beam 2.
A removable wedge body 20 is provided at the intersecting inner part of the clamping piece 9.
When the A9B is in the clamping position, the wedge body 20 is attached to tighten and lock the intersecting position of the vertical beam 1 and the right horizontal beam 2. Note that FIG. 2(C) shows a manual underwear structure in which the wedge body 20 is connected to a string body 21, and FIG. 2(B) shows a structure in which the wedge body 20 is biased and inserted by a biasing spring 22. When removing the wedge body 20, the structure is such that the upper end is hooked onto the locking piece 23 by manually pulling it up. According to the embodiment shown in FIG. 2, the clamping position of the clamping piece 9A9B by the lever-acting vertical 't, 1 and the left and right cross beams 2 and 3 is locked, so that no wB impact is applied during lifting or Even if one end of a long object comes into contact with another object or the ground and a shock is transmitted, there is no danger of the clamping position being collapsed and the object falling or shifting, making the lifting action more stable.

In addition, FIG. 2(D) shows another means for advancing and retracting the above-mentioned forward and backward shaft 13, in which the amount of forward and backward movement is set by the screwed forward and backward shaft 13, and the span of the clamping piece 9A9B is stepless. It is now possible to set.

On the other hand, FIG. 3 shows a modification of the embodiment shown in FIG. 1, which consists of a vertical beam 1 in which the left horizontal piece 11 and the vertical piece 12 intersect at an acute angle 02. A cross beam 3 is provided and has the same effect as that shown in the first figure. The device shown in FIG. 3 may also be provided with the above-mentioned tightening locking means consisting of the tightening rod 19 or the wedge body 20.

Next, with reference to FIG. 4, a detailed explanation will be given of the second invention applied to lifting of piled concrete square groove covers 25 and the like. This lifting tool has an inverted vertical beam 1 in which the vertical piece 12 and the right horizontal piece lO intersect at an obtuse angle θ1, as described above;
It has a pivot point 6A below the vertical beam 1, extends in the same direction as the right horizontal piece IO, and is combined with a horizontal beam 4 whose tip is inclined downward, and faces the tips of the vertical beam 1 and the horizontal beam 4. An inverted-shaped clamping piece 9A9B is provided, and the cross beam 10 is connected to the stopper 7.
The downward rotation is regulated by

In the embodiment shown in FIG. 4, when the clamping piece 9A9B is applied to the upper corner of the groove cover 25 and lifted up as it is, the longitudinal beam l functions as a "lever" due to the weight of the groove cover 25, and the pivot point 6A becomes the fulcrum. The clamping piece 9A of 1 acts as a point of action, and the clamping piece 9A9I
Since a clamping force P is generated in the direction of reducing the span L□ between the grooves 3 and 3, the groove cover 25 is lifted up by the clamping piece 9A9B. If it is unloaded as it is, the clamping force is canceled due to the release of its own weight, and it can be removed as it is, making it extremely convenient to lift and transport the mm25.

Next, other embodiments of the second invention will be described based on FIGS. 5 to 8. First, FIG. 5 shows the embodiment shown in FIG. 4 with tightening and locking means for the vertical beams 1 and horizontal beams 4,
Between the vertical beam 1 and the horizontal beam 4, a clamping piece 9A9B is attached to the groove cover 2.
A tightening locking means consisting of a wedge body 20 or a tightening rod 19 is provided which tightens and locks the pinching position when the upper end corner of 5 is pinched from the right.

That is, this tightening means has the same structure as shown in FIGS.
9 is provided between the vertical beam 1 and the horizontal beam 4, or a removable wedge body 20 is provided on the inside of the intersection between the vertical beam 1 and the horizontal beam 4 to lock the tightening position and prevent loosening. It has become. This embodiment of FIG. 5 has the same effect as described above.

Next, FIG. 6 shows examples of changes in the shape of the clamping pieces 9A9B, and arbitrary shapes such as opposing V-shapes, opposing circular arcs, opposing inverted V-shapes, etc., are adopted according to the side shape of the lifted article. .

Also, in FIG. 5(C), similar to the embodiment in FIG.
The span L□ can be arbitrarily adjusted and set.

Next, FIG. 7 shows a modification of the embodiment in FIG. 4,
A vertical beam 1 consisting of a left horizontal piece 11 and a vertical piece 12 intersect at an acute angle θ2, and a horizontal beam 4 extends in the opposite direction to the left horizontal piece 11. The device shown in FIG. 7 also has the same function as the device shown in FIG. 4, and may be provided with a tightening locking means consisting of the same tightening rod 19 or wedge body 20 as described above.

On the other hand, FIG. 8 shows another embodiment of the second invention, which is used for dropping articles into water or lifting them up.
In the suspension device consisting of the longitudinal beam 1 and the cross beam 4 having the locking means consisting of the wedge body 20, the wedge body 20 and the cross beam 4 are provided with a float body 24.

According to the one in FIG. 8, when the clamping piece 9A9B is used to clamp and lift the object and lower it into the water, when the clamping force is removed by releasing the weight of the lifted object, the wedge body 20 comes off due to the buoyancy of the float body 24. At the same time, the horizontal beam 4 floats up, allowing automatic release of the suspended object carried in the water.

Next, the lifting tool of the third invention will be explained based on FIG. This embodiment is for vertical suspension of the above-mentioned II, etc., and includes the vertical beam 1, the horizontal beam 4, and the clamping piece 9A9B of the second invention.
In the hanging tool having the right horizontal piece lO of the vertical beam 1 and the vertical piece 12, if the right horizontal piece 10 and the vertical piece 12 are made to have a removable connection structure with separate objects, the tip of the horizontal piece 4 has a hole perpendicular to the horizontal piece 4. A separate auxiliary horizontal piece 2 that is detachable and can be attached with a hanging part 5.
6 are connected.

According to the embodiment of FIG. 9, it can be used in the same manner as described above as shown in FIG. 9(A), and the horizontal JILO is connected in the opposite direction to the vertical piece 12 as shown in FIG. When the hanging part 5 is attached to the auxiliary horizontal piece 26, it becomes an assembly beam structure in which the vertically opposing clamping pieces 9A9B are located below the hanging part 5, and the groove cover can be placed in a vertical position or a single cover balance. It can be lifted and transported in a diagonal position.

Finally, with reference to FIG. 10, another embodiment similar to those shown in FIGS. 1 to 9 will be described. A plurality of the lifting tools 28 of the above-mentioned embodiments by the second and third inventors may be attached to a common lifting bar 27 and used for lifting long objects. Furthermore, although not shown, the float body 24 of the embodiment shown in FIG. 8 may be attached to the lifting tool shown in FIG. 2(C). Furthermore, the clamping pieces 9A9B may be made longer to clamp a plurality of objects to be lifted at the same time.

"Effect of the invention" As explained above, the lifting tool of the present invention is as follows.

If you apply the pair of clamping pieces to the object to be lifted and pull it up, and then unload it, the clamping pieces will come loose and come off, making it extremely easy to lift and move the object, and also ensure safety during lifting. Improve workability and safety when lifting, transporting, and relocating various items. Further, it has various effects such as being simple in structure, inexpensive, and highly practical.

[Brief explanation of drawings]

Figure 1: Shows a lifting tool of an embodiment of the first invention, (A) is a front view thereof, (I3) is an AA sectional view of (A), (C) is a BI3 sectional view of (A), (D ) is a side view of desk C in (A),
Figure 2: shows an embodiment of the first invention, (A) and (B) are front views thereof, (C) and (D) are partial front views thereof, Figure 3: Front view of another embodiment of the first invention Figures, Figure 4: Front view of the lifting tool of the second invention-embodiment, Figures 5 (A) (B) (C):
Front view of the embodiment of the second invention, Fig. 6: Front view of the clamping piece of another embodiment of the second invention, Fig. 7.8: Front view of the embodiment of the second invention, Fig. 9 ( A) (B): Front view of a lifting tool according to an embodiment of the third invention, FIG. 10, and side view of an example of use of the lifting tool of the present invention. Left cross beam, 4: Cross beam, 5: Lifting tool, 6AGI3: Pivot point, 7: Stopper 8: U-shaped groove, 9A9B: Clipping piece, 1
0: Right horizontal piece, 11: Left horizontal piece, 12: Vertical piece, 13: Advance/retreat axis, 14: Clamping surface, 15A15B: Locking hole, 16: Locking pin, 18: Turnbuckle, 19: Tightening rond, 20: cuneiform, 21: string. 22: Biasing spring, 24: Float body. 25: Groove lid. 26: Auxiliary horizontal piece, 27: Lifting bar. 28: Lifting device patent applicant Yabe Kataoka

Claims (6)

[Claims] (1) A vertical beam with an inverted L-shape in which the right horizontal piece and the vertical piece intersect at an obtuse angle, or the left horizontal piece and the vertical piece intersect at an acute angle, and has a lifting part at the upper end, and a vertical beam that is pivoted below the vertical beam. It consists of a combination of a right cross beam that is fixed and restricts downward rotation, and a left cross beam that is pivoted above the right cross beam and restricts downward rotation.
A lifting device characterized by a structure in which a clamping piece is provided at the front end of the right cross beam, the pair of left and right clamping pieces abut the inside of the object to be lifted, and the clamping piece is clamped and lifted by the weight of the object to be lifted. Ingredients. (2) Tightening and locking means for the longitudinal and transverse beams is provided, which comprises a tightening rod provided between the longitudinal and transverse beams, or a wedge body that is removably inserted into the inner side of the intersection between the longitudinal and transverse beams. A lifting tool according to claim (1). (3) A vertical beam in which the right horizontal piece and the vertical piece intersect at an obtuse angle, or the left horizontal piece and the vertical piece intersect at an acute angle, forming an inverted L shape, and which has a lifting part at the upper end, and a vertical beam with a pivot point below the vertical beam. A lifting device characterized by a structure consisting of a horizontal beam that is supported and whose downward rotation is restricted, and that clamping pieces are provided opposite to the lower ends of the vertical beam and the horizontal beam. (4) Tightening and locking means for the longitudinal and transverse beams, consisting of a "tightening rod provided between the longitudinal and transverse beams" or a "wedge body removably inserted into the inner part of the intersection between the longitudinal and transverse beams"; A lifting device according to claim (3). (5) Claim No. (2) (
4) Lifting equipment described in section 4). (6) The horizontal pieces of the vertical beams are made into a removable connection structure, and
Claim No. 1, characterized by a combination beam structure, in which an auxiliary horizontal piece is provided at the tip of the horizontal piece, intersecting with the horizontal piece, detachably connected to the horizontal piece, and having a lifting part freely attached. 3)(4
).