JP2023061640A - Formwork hanging tool - Google Patents

Abstract

To provide a formwork hanging tool capable of suppressing occurrence of distortion when a wooden formwork is hung and moved.SOLUTION: A tool to hang a formwork consisting of side frames and bottom frames consists of a hanging part to hang a formwork, multiple shaft parts passing through the bottom frames, and a rope part to connect the hanging part and the shaft parts. The hanging part consists of a frame part and multiple arm parts. The arm part is provided at the upper part of the frame part, and configured such that the longitudinal direction of the arm part is parallel to the width direction of the frame part and that both end parts of the arm part have multiple hanging parts.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a form hanging jig, and more particularly to a technique for making a form movable by using the form hanging jig.

Conventionally, there has been a precast method as a method of manufacturing concrete members in a factory, transporting the members to a construction site, and joining them together. Steel forms and wooden forms are considered as forms for producing concrete members in factories. When producing a large number of concrete members of one type, a steel formwork is often used, and when producing only a few concrete members, a wooden formwork is often used. Formwork is typically made at a formwork manufacturing site and brought to the concrete production site.

In the case of a steel formwork, since it is rigid, distortion due to movement is less likely to occur. On the other hand, wooden forms tend to be distorted when lifted for movement, and large forms are difficult to move. Therefore, there has been a demand for a technology that suppresses the generation of distortion when the wooden formwork is lifted for movement.

Various techniques have been conventionally proposed for such problems. For example, a hoisting jig (see Patent Literature 1) for moving a wooden mold has been proposed and is a well-known technique. In more detail, one side of the wooden formwork is sandwiched between a pair of bars, the gap between the bars is narrowed with a screw structure, the wooden formwork is strongly held by the two bars, and hooks are hooked on the hook receivers provided on the bars. It is a structure that can be lifted by

However, in the technical proposal described in Patent Document 1, since one side of the wooden formwork is held and suspended, the direction of gravity applied to the wooden formwork differs when it is moved, and eventually the wooden formwork is distorted. Therefore, the above problems have not yet been solved.

JP 2021-215056 A

SUMMARY OF THE INVENTION An object of the present invention is to provide a lifting jig capable of suppressing the occurrence of distortion when lifting and moving a wooden mold.

In order to solve the above-mentioned problems, a formwork hoisting jig according to the present invention is a jig for hoisting a formwork consisting of a side frame and a bottom frame. It comprises a shaft portion and a rope portion connecting the lifting portion and the shaft portion, the lifting portion comprising a frame portion and a plurality of arms, the arms being provided on top of the frame portion and extending in the longitudinal direction of the arms. are parallel to the width direction of the frame, and a plurality of hanging portions are provided at both ends of the arm.

Further, according to the present invention, two cylindrical portions into which claws of a forklift are inserted are provided in the lower portion of the frame portion, and the claws of the forklift can be inserted at least beyond the midpoint in the longitudinal direction of the arms. adopt means.

Furthermore, the present invention employs means in which a stopper is provided on one side of the cylindrical portion to prevent the claw of a forklift from coming off.

Further, according to the present invention, the frame portion and the arms are fixed by bolts, and the frame portion has a plurality of fixable positions for each of the plurality of arms.

Still further, the present invention is characterized in that said tube is of square tube shape and at one end of the tube has a notch at the upper end sufficient to accommodate a vertical portion of a forklift claw, The upper parts of the left and right ends have stopper holes, the lower parts of the left and right ends have diagonal cutouts, and the lower ends have cutouts that are shorter in the axial direction than the cutouts on the upper ends. Lack is used as a means.

According to the formwork hanging jig according to the present invention, it is possible to lift and move a wooden formwork by using a crane or a forklift without generating distortion, and to move the formwork to a concrete member production site. can move smoothly, which contributes to the improvement of the productivity of concrete members.

1 is an overall perspective view showing an embodiment of a form hanging jig according to the present invention; FIG. It is a trihedral view showing an embodiment of a form hanging jig according to the present invention. It is explanatory drawing which shows the working process using the formwork suspension jig|tool which concerns on this invention. FIG. 4 is an explanatory view showing an attachment mode of arm portions in the embodiment of the form hanging jig according to the present invention. FIG. 4 is an explanatory view showing an insertion portion of claws of a forlift in an embodiment of a jig for suspending formwork according to the present invention. It is explanatory drawing which shows the example of a work using the formwork suspension jig|tool which concerns on this invention.

The formwork hanging jig according to the present invention is most characterized in that the wooden formwork can be lifted and moved without being distorted.
BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a form hanging jig according to the present invention will be described below with reference to the drawings.
It should be noted that the overall shape and the shape of each part of the form hanging jig shown below are not limited to the following embodiments, but are within the scope of the technical idea of the present invention, that is, the same effects can be exhibited. The shape, size, structure, etc. can be changed as appropriate within the scope of the scope.

The present invention will be described with reference to FIGS. 1 to 6. FIG.
FIG. 1 shows an overall perspective view of the present invention.
FIG. 2 shows three views of the same, where (a) is a top view, (b) is a front view, and (c) is a side view.
FIG. 3 is an explanatory view showing the work process using the present invention, (a) is the process of moving the formwork hanging jig to the position of the formwork, and (b) is the formwork hanging jig. Step (c) is a step of moving the formwork with a formwork hanging jig.
FIGS. 4A and 4B are explanatory diagrams showing mounting modes of the arms of the present invention, in which (a) shows mounting holes for the arms, and (b) shows a mode in which the number of arms is increased.
5A and 5B are explanatory diagrams showing the inserting portion of the claw of the forlift according to the present invention, in which (a) shows a notch portion and the like, and (b) shows the insertion position of the claw with the claw of the forlift being inserted. It is a figure explaining visually confirming attachment confirmation of a stopper through a notch part.
FIG. 6 is an explanatory diagram showing a working example using the present invention.

The mold suspension jig 1 is a jig for moving the mold 70 using a crane or a forklift 80 .
The mold hanging jig 1 mainly comprises a lifting portion 10, a shaft 50 and a rope portion 60 (Fig. 1).

The hoisting part 10 is a structure for hoisting the formwork 70 composed of the side frames 72 and the bottom frame 71 and has sufficient rigidity and strength for hoisting the formwork 70 . The horizontal size is approximately the same as that of the formwork 70 .
The lifting portion 10 is composed of a frame portion 20, a plurality of arm portions 30, and two tubular portions 40. As shown in FIG. The arm portion 30 is provided on the upper portion of the frame portion 20 , and the longitudinal direction of the arm portion 30 is parallel to the width direction of the frame portion 20 . Two cylindrical portions 40 into which the claw portions 81 of the forklift 80 are inserted are provided in the lower portion of the frame portion 20 . (Figures 1 and 2)

The frame portion 20 is a skeleton of the lifting portion 10 . It has a ladder-like structure in which two U-shaped steels extending in the longitudinal direction of the frame portion 20 are connected by a plurality of steel materials. Since the weight of the formwork 70 and the like is supported near the center in the longitudinal direction of the U-shaped steel, it has sufficient strength to withstand it.

Arm portion 30 is fixed to frame portion 20 with bolts 64 . The frame portion 20 has a plurality of fixable positions for each of the plurality of arms 30 . In other words, a plurality of arm fixing holes 21 are provided so that the fixing position of each arm 30 can be finely adjusted. (Fig. 4(a)). This is because the position and number of arms 30 can be adjusted so that the formwork 70 is not distorted when the formwork 70 is lifted due to the size, weight, and shape of the formwork 70 . An example in which six arms 30 are used is shown in FIG. 4(b).

The frame portion 20 has a tubular portion fixing hole 22 for fixing the tubular portion 40 with a bolt 64 . In addition, sub suspension parts 23 are arranged at the center of the U-shaped steel of the frame part 20 and in the vicinity of both ends thereof. The sub-suspension unit 23 is used when suspending the hoisting unit 10 by using a crane or the like. Allows lifting movement of all jigs.

The arm portion 30 is an arm that lifts the mold 70 via the rope portion 60 and the like. It is made of H-steel material and fixed to the frame portion 20 by a bolt 64 near the center of the arm portion 30 in the longitudinal direction.
A plurality of hanging portions 31 are arranged at both ends of the arm portion 30 . The suspension part 31 has a ring-shaped suspension part. A hanging metal fitting 61 is passed through the ring portion of the hanging portion 31 , a hook 62 is passed through the hanging metal fitting 61 , and a rope portion 60 is hung on the hook 62 . The reason why the hanging metal fittings 61 are used is that the direction in which the rope portion 60 is lifted with respect to the hanging portion 31 may differ depending on the form of the formwork 70 . The reason for using the hook 62 is to reduce damage to the rope portion 60 .

A plurality of hanging portions 31 are provided at both ends of the arm portion 30, respectively. By having a plurality of suspension parts 31, the optimum suspension part 31 can be selected according to the shape and size of the formwork 70. FIG.

The cylindrical portion 40 is a portion that accommodates the claw portion 81 of the forklift 80 . The cylindrical portion 40 is fixed with a bolt 64 near the center of the frame portion 20 in the longitudinal direction. There are two tubular parts 40 , both of which are fixed below the frame part 20 . The inner diameter of the tubular portion 40 is large enough to accommodate the claw portion 81 , and the claw portion 81 can be inserted beyond at least the midpoint of the arm portion 30 in the longitudinal direction. By inserting the claw portion 81 beyond the midpoint, the lifting portion 10 as a whole can be held in good balance (FIG. 2(c)). Moreover, it is preferable that the tubular portion 40 is a square tube so that the upper portion of the claw portion 81 is evenly in contact with the tubular portion 40 .

Stopper holes 42 are provided in the upper portions of the left and right surfaces of the ends of the tubular portion 40 on the side where the claw portions 81 are inserted, and stopper pins 45 can be fixed therein (FIG. 5A). ). By fixing the stopper pin 45 after the claw portion 81 is accommodated in the tubular portion 40, it is possible to prevent the tubular portion 40 from coming off (FIG. 5(b)).

An upper notch 41 is provided on the upper surface of the end of the cylindrical portion 40 on the side where the claw portion 81 is inserted, left and right notches 43 are provided on the lower left and right surfaces, and a lower notch 44 is provided on the lower surface. (Fig. 5(a)). The upper notch 41 is a notch for accommodating the upright portion 82 of the pawl. The left and right cutouts 43 and the lower cutouts 44 are cutouts for visually confirming the inserted state of the cylindrical portion 40 and the state of the stopper pin 45 .

It is important to confirm the position of the claw portion 81 and the state of the stopper pin 45 when the claw portion 81 is accommodated in the cylindrical portion 40 or when the mold 70 is lifted. However, when the lifting part 10 is pulled up to some extent by the forklift 80, it is necessary to visually check from below, as indicated by the line A in FIG. At that time, the operator who checks the position of the claw portion 81 and the state of the stopper pin 45 checks the forklift 80 from diagonally below. At this time, the left and right notches 43 and the lower notch 44 make it easier to check the claw portion 81 and the stopper pin 45 from obliquely below (FIG. 5(b)).

Shaft 50 is longer than formwork 70 and has sufficient rigidity to lift formwork 70 . The shaft 50 passes through a hole formed in the bottom frame 71 and both ends protrude. The formwork 70 is lifted by hanging the rope part 60 on both protruding ends.

Both ends of the shaft 50 are provided with rope pull-out prevention pins 63 . The rope pull-out prevention pin 63 has a structure in which it is inserted into the shaft 50 from above, and a sufficiently long protrusion is provided from below the shaft 50 . The protruding portion of the rope pull-out prevention pin 63 prevents the rope portion 60 from slipping out of the end portion of the shaft 50 (FIG. 2(c)).

The rope portion 60 is mainly made of polyester or nylon. By using a resin rope, the force can be dispersed during lifting, which is preferable. The rope portion 60 may be ring-shaped or have ring-shaped ends. It is preferable that the portion that hooks the hook 62 and the portion that hooks the shaft 50 are reinforced in order to cope with deterioration due to rubbing or the like.

The formwork 70 is an object to be lifted and moved by the formwork hanging jig 1 .
The formwork 70 is a mold for making a concrete member. Metal molds are used for mass production of the same mold, but wooden molds are often used for production of a few pieces.
The formwork 70 is composed of a side frame 72 into which concrete is poured and a bottom frame 71 that supports the side frame 72 . A bottom frame 71 is formed below the side frame 72 in order to use the side frame 72 stably. If the bottom surface of the side frame 72 has unevenness, the bottom frame 71 also has unevenness along it, so that the entire side frame 72 can be evenly placed (FIG. 1). The side frame 72 and the bottom frame 71 may have an integral structure that is strongly connected to improve strength. It has a long plate structure. The long plate of the bottom frame 71 has a required number of holes through which the shafts 50 can pass.

A lifting operation will be described along FIG.
FIG. 3(a) shows a step of preparing the formwork 70 that has been created to be moved to another place. The lifting part 10 is held by the claw part 81 of the forklift 80 and moved to a place where the formwork 70 is located.
The lifting portion 10 is made by fixing the arm portion 30 and the tubular portion 40 to the frame portion 20 with bolts 64 . The number of arms 30 and the fixed positions to the frame 20 are determined according to the size and strength of the formwork 70 and the formwork placement section 71 . A stopper pin 45 is fixed to the end of the tubular portion 40 to prevent the claw portion 81 from coming off from the tubular portion 40 . The arm part 30 may be attached with a hanging metal fitting 61 and a hook 62 in advance.

FIG. 3(b) shows a step of preparing for lifting the mold 70. As shown in FIG. The lifting part 10 is arranged on the top of the formwork 70, and the plurality of shafts 50 are passed through the bottom frame 71. - 特許庁One end of the rope portion 60 is passed through the hook 62 and the other end of the rope portion 60 is hung on the end of the shaft 50 . A rope pull-out prevention pin 63 is arranged at the end of the shaft 50 to prevent the rope part 60 from coming off.

FIG. 3(c) shows a step of moving the formwork 70. FIG. The formwork 70 is lifted by the formwork hanging jig 1 supported by the claws 81 of the forklift 80 . The formwork 70 is moved to a predetermined location by a forklift 80 . Since it is not lifted by a crane or the like, it can be moved anywhere the forklift 80 can pass regardless of whether it is indoors or outdoors, and can be moved very efficiently. In this figure, the truck bed 83 is loaded. After the completion of loading, the form hanging jig 1 is disassembled and loaded onto a truck.
After being moved to a desired location by a truck, the form hanging jig 1 is assembled, and the form 70 can be lowered from the truck bed 83 by a forklift 80 and placed at a predetermined location.

FIG. 6 shows a loading operation when moving the formwork 70 by a truck or the like. Since the shape of the bottom surface of the side frame 72 differs depending on the shape of the concrete member to be produced, if only the side frame 72 is piled up, it will not be stable and distortion will easily occur. By moving the side frame 72 and the bottom frame 71 integrally, the formwork 70 as a whole becomes a rectangular parallelepiped shape, so that it is easy to stack and move. Therefore, one mold frame 70 (side frame 72 and bottom frame 71) can be loaded onto the truck bed 83, and another mold frame 70 (side frame 72 and bottom frame 71) can be piled up and loaded onto the truck bed 83.
In addition, when moving and loading with the forklift 80, the formwork 70 and the like can be lifted up to about 4 meters, and two or three layers can be stacked on the truck bed 83, which improves the efficiency of movement. can.

As described above, according to the formwork hanging jig 1 according to the present invention, when moving the wooden formwork 70, it is possible to lift and move the wooden formwork 70 without causing distortion, and the mold can be transported to a concrete member production site. The movement of the frame 70 can be performed smoothly, which contributes to the improvement of the productivity of concrete members.

Also, in lifting a structure, a method of passing wires through a plurality of lifting parts and pulling them up with a crane or the like is generally adopted. According to the formwork suspension jig 1 according to the present invention, the formwork 70 can be lifted by either the crane or the forklift 80 . In other words, not only can the sub-suspension unit 23 be used for lifting with a crane, but the forklift 80 can also be used for lifting. Since the jig can be lifted and moved using the overhead crane in the factory, the work efficiency can be improved.

Furthermore, since the formwork hanging jig 1 according to the present invention can be disassembled by removing the bolt 64, the jig can be made compact and carried when moving by truck or the like, and can be assembled and used at the destination. is also easy, and contributes to the improvement of convenience.

Further, according to the formwork hanging jig 1 according to the present invention, by changing the position of the arm portion 30, etc., it is possible to deal with various formwork with a single jig, so that versatility is improved. can be done.

It is understood that the mold hanging jig according to the present invention has great industrial applicability as a method for lifting and moving wooden molds without distortion.

1 Mold hanging jig 10 Lifting part 20 Frame part 21 Arm fixing hole 22 Cylinder part fixing hole 23 Sub-hanging part 30 Arm part 31 Hanging part 40 Cylinder part 41 Upper notch 42 Stopper hole 43 Right and left notch 44 Lower notch 45 Stopper pin 50 Shaft 60 Rope 61 Hook 62 Hook 63 Rope prevention pin 64 Bolt 70 Formwork 71 Bottom frame 72 Side frame 80 Forklift 81 Claw 82 Claw upright portion 83 Truck bed

In order to solve the above-mentioned problems, a formwork hoisting jig according to the present invention is a jig for hoisting a formwork consisting of a side frame and a bottom frame. It comprises a shaft portion and a rope portion connecting the lifting portion and the shaft portion, the lifting portion comprising a frame portion and a plurality of arms, the arms being provided on top of the frame portion and extending in the longitudinal direction of the arms. is parallel to the width direction of the frame portion, and at both ends of the arm portion, there are a plurality of suspension portions for suspending the rope portion and suspending the shaft portion via the rope portion. means is provided with a rope pull-out prevention pin protruding downward .

In order to solve the above-mentioned problems, a formwork hoisting jig according to the present invention is a jig for hoisting a formwork consisting of a side frame and a bottom frame. It comprises a shaft portion and a rope portion connecting the lifting portion and the shaft portion, the lifting portion comprising a frame portion and a plurality of arms, the arms being provided on top of the frame portion and extending in the longitudinal direction of the arms. is parallel to the width direction of the frame portion, and at both ends of the arm portion, there are a plurality of suspension portions for suspending the rope portion and suspending the shaft portion via the rope portion, and at both ends of the shaft portion employs a means provided with a detachable rope pull-out prevention pin projecting downward.

Claims (5)

A jig for lifting a formwork consisting of a side frame and a bottom frame,
a lifting part for lifting the formwork;
It consists of a plurality of shafts penetrating the bottom frame and a rope connecting the lifting part and the shafts,
The lifting part consists of a frame part and a plurality of arms,
The arm part is provided on the upper part of the frame part,
The longitudinal direction of the arm is parallel to the width direction of the frame,
A mold hanging jig characterized by having a plurality of hanging portions at both ends of an arm. A lower portion of the frame portion is provided with two cylindrical portions into which claws of a forklift are inserted, and the claws of the forklift can be inserted at least beyond the midpoint of the longitudinal direction of the arms. Item 1. The formwork hanging jig according to item 1. 3. The jig for suspending formwork according to claim 2, wherein a stopper is provided on one side of the cylindrical portion to prevent the claw of the forklift from coming off. The frame and arms are fixed with bolts,
4. The form hanging jig according to any one of claims 1 to 3, wherein the frame has a plurality of fixable positions for each of the plurality of arms. The cylindrical portion is a square cylindrical shape, and at one end of the cylindrical shape,
The top edge has a notch large enough to accommodate the vertical part of a forklift claw,
Upper left and right ends have stopper holes, and lower left and right ends have slanted cutouts.
5. The form hanging jig according to any one of claims 1 to 4, wherein the lower end has a notch that is shorter in the axial direction of the cylindrical portion than the notch in the upper end.

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