JPH08108421A - Form lifting attachment and form lifting operation vehicle - Google Patents

Abstract

PURPOSE: To obtain a form lifting attachment capable of raising a wide form and an operation vehicle for lifting the form. CONSTITUTION: A form lifting attachment is provided with a hanger frame 24b for retaining a hanger assembly 24 on a tilt mast 3 in a raising and lowering manner, an inside clamp 26 supported by the hanger frame 24b for supporting the upper central part of the form, a pair of left and right outer clamps 27 for supporting the upper parts of the left and right sides of the form in front of the left and right outer sides of the inner clamp 26 and a pull-up device 28 for raising and lowering each outer clamp 27. Even if form is wide, it can be lifted by the apparactus without causing deflection.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a form lifting attachment and a form lifting work vehicle, and more particularly to a form lifting attachment and a form lifting work vehicle adapted to lift a wide form.

[0002]

2. Description of the Related Art For example, in dam construction work such as dam construction, concrete is placed in a formwork and solidified, and then a self-propelled mobile crane is placed on the concrete and the formwork is connected via a wire rope. Sling on the hook of the crane,
Overhang a part of the boom of the crane in front of the concrete and peel the formwork from the concrete with a bar etc. while tensioning the wire rope, further lift the formwork to a predetermined height with a crane, The dam body is made by repeating the procedure of assembling the formwork as the formwork of the upper stage.

According to this method, the form which is peeled off from the concrete and hung by a crane shakes and collides with the concrete, which may damage the concrete. Therefore, the inventor of the present invention has a projecting beam supported by a self-propelled carriage and a horizontal end in the horizontal direction at the front end of the projecting beam so as not to swing the removed formwork more than necessary. A tilt mast that is swingably supported, a tilt cylinder that drives this tilt mast, a hanger assembly that is supported by the tilt mast so that it can be raised and lowered, and a lift drive device that drives the hanger assembly to move up and down. We have already proposed a form lifting attachment that includes a hanger frame that is supported by a tilt mast so that it can be raised and lowered, and a hanger pin that is supported by this hanger frame and that is engaged with and disengaged from the form (Japanese Patent Application No. 3-86).
309).

In this formwork lifting attachment, since the hanger pins that are engaged with and disengaged from the formwork are supported by the dolly without the intermediary of a wire rope, it is possible to reduce the back-and-forth swing of the formwork, and It was possible to prevent the rocket from swinging back and colliding with the concrete.

[0005]

However, according to the form lifting attachment according to this prior invention, when the width of the form is large, the form bends like a bow and both ends of the form are separated from the concrete. Or both ends may shake and collide with concrete.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a formwork lifting attachment and a formwork lifting work vehicle capable of lifting a wide formwork. is there.

[0007]

The form lifting attachment of the present invention is, for example, as shown in FIG. 1, an extension beam 21 supported by a self-propelled carriage 1 and a front end portion of the extension beam 21. Tilt mast 22 and the tilt mast 2 described above.
In order to achieve the above object, in a formwork lifting attachment including a hanger assembly 24 that is supported by the projecting beam 21 via 2 via a hanger assembly, and a lifting drive device 25 that drives the hanger assembly 24 up and down. I am taking such measures.

That is, the hanger assembly 24 is supported by the tilt mast 3 so that the hanger assembly 24 can move up and down, and an inner clamp 26 that is supported by the hanger frame 24b and supports the central upper portion of the mold 31.
And a pair of left and right outer clamps 27 that support the left and right upper portions of the formwork 31 in front of the left and right outer sides of the inner clamp 26.
And a pull-up device 2 for raising and lowering each outer clamp 27
8 is a formwork lifting attachment.

Further, the form lifting work vehicle of the present invention is a form lifting work vehicle constituted by the self-propelled carriage 1 and the form lifting attachment 2 of the present invention in order to achieve the above object.

[0010]

[Operation] In the present invention, the mold is supported by the inner clamp 26 at the center upper portion thereof and the outer clamp 27.
Formwork 3 at the left and right outer sides of the inner clamp 26
The upper left and right sides of 1 are supported. Then, by driving the outer clamp 27 upward by the pull-up device 28, a force is applied to the mold frame 31 so as to bend the mold frame 31 upward in a bow shape, and the mold frame tries to bend upward in a bow shape due to its own weight. Deflection of 31 can be reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A formwork lifting work vehicle using a formwork lifting attachment according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view of a formwork lifting vehicle according to an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a front view thereof. As shown in FIG. The formwork lifting work vehicle is composed of a self-propelled carriage 1 and a formwork lifting attachment 2. The self-propelled carriage 1 has a frame 11, a traveling device 12 attached to the lower side of the frame 11, and a rear portion of the frame 11. A fixed weight 13, a pair of left and right outriggers 14 provided on the front part of the frame 11, and a hydraulic system 15 shown in FIG. 2 are provided.

The traveling device 12 may be a crawler type traveling device having a pair of right and left crawlers, but in this embodiment, as shown in FIGS. In, a tire-type traveling device including two front wheels 12f and one rear wheel 12r arranged at respective vertices of an isosceles triangle is used.

The front wheels 12f and the rear wheels 12r are each made to be able to turn 180 ° around a vertical axis, and the steering cylinders 12a.
The steering is carried out by 2b and the hydraulic motors are driven to rotate around respective axles.

That is, the front wheels 12f and the rear wheels 12r.
Of the front wheels 12f and the rear wheels 12r are moved straight in the left-right direction, or the front wheels 12f are moved in the left-right direction. Inclining the axle of the rear wheel 12r to turn the self-propelled carriage 1 to the left or right, or intersecting the extension lines of the axles of the front wheel 12f and the rear wheel 12r at one point, centering on the intersection point. It is possible to make a pivot turn.

When a crawler type traveling device is used as the traveling device 12, the left and right crawlers can be pivoted by rotating them in opposite directions, and the left and right crawlers can be rotated in the same direction at different speeds. If you move it, you can make a big turn to the left and right,
1 is mounted 180 ° or fully swivelable, while the left and right crawlers are pivoted by 90 °, the frame 11 is pivoted in the opposite direction by 90 °, and then the left and right crawlers are rotated in the same direction at the same speed. As a result, the traveling direction can be changed by 90 ° without changing the direction of the frame 11, and the vehicle can go straight in the front-rear direction or the left-right direction.

The outrigger 14 is a hydraulic system 14.
Self-propelled trolley 1 is supplied with pressure oil from
It is extended to hold it horizontally and grounded on the concrete surface, and shortened so that it does not hinder running when running, so that it floats above the concrete surface.

The hydraulic system 15 includes a hydraulic oil tank 1
5a, a hydraulic pump 15b, an engine 15c for driving the hydraulic pump 15b, a suction pipe for guiding hydraulic oil from the hydraulic oil tank 15a to the hydraulic pump 15b, and a hydraulic pump 15
Pressure oil supply pipe for supplying pressure oil from b to the formwork lifting attachment 2, traveling device 12, and outrigger 14, and pressure oil is returned from the formwork lifting attachment 2, traveling device 12, and outrigger 14 to the hydraulic oil tank 15a. It is equipped with a drain pipe.

The hydraulic oil tank 15a is arranged on the left side of the frame 11, and on the right side of the frame 11,
As shown in FIG. 1, a driver's cab 16 and a driver's seat 17 are provided, and a steering handle 18 is set up on the rear side of the driver's cab 16.

The formwork lifting attachment 2 includes an overhanging beam 21, a tilt mast 22, and the tilt mast 2
A tilt cylinder 23 that swings and drives 2; an elevating frame 24 that is supported up and down by the overhanging beam 21 via the tilt mast 23; and an elevating cylinder 25 as an elevating drive device that drives the elevating frame 24 up and down. An inner clamp 26 and an outer clamp 27 arranged on the front surface of the elevating frame 24, and a pull-up cylinder 28 for elevating the outer clamp 27 are provided.

As shown in FIG. 1, the projecting beams 21 are a pair of telescopic beams 21a composed of inner and outer double-angled tubes supported on the left and right side portions of the frame 11, and both telescopic beams 21a as shown in FIG. 21a is provided with a connecting frame 21b for connecting the front portions of the inner tubular tubes to each other, and a connecting frame 21c for connecting the front portions of the outer tubular tubes of the telescopic beam 21a to each telescopic beam 21a as shown in FIG. A telescopic cylinder 21d, which is a hydraulic cylinder that extends and contracts this, is built in.

Further, another outrigger 21e is provided on the lower surface of the connecting frame 21b of the overhanging beam 21 to hold the overhanging beam 21 horizontally at the time of lifting the form and at the same time, the form pulling attachment 2 and the form 31. In order to support the weight of the concrete, it is extended and grounded on the concrete top surface, and shortened so that it does not hinder the running while traveling so that it floats above the concrete surface.

As shown in FIGS. 3 and 7, the tilt mast 22 includes a pair of left and right guide frames 22a, and the guide frames 22a.
Reinforcing the upper and middle and lower three steps of connecting the upper and middle and lower three steps of the reinforcing frame 22b, the pair of left and right slide frames 22c that are vertically inserted into the guide frame 22a. A frame 22d is provided, and as shown in FIG. 1, the guide frame 22a is swingably supported on the front end portion of the overhanging beam 21 via a hinge 22e.

Further, as shown in FIGS. 1 and 2, the tilt cylinder 23 is mounted over the guide frame 22a and the overhanging beam 21. As shown in FIG. 3, the lifting cylinder 25
Is a hydraulic cylinder, and the guide frame 22a has a cylindrical body 25a.
Is fixed, and the piston rod 25b protruding from the upper end of the cylindrical body 25a is connected to the upper portion of the slide frame 22c.

A pair of upper and lower guide shafts 22f extending in the left-right direction are fixed to the lower portions of both slide frames 22c, and the hanger assembly 24 is slidably supported by these guide shafts 22f in the left-right direction. Cylinder 25
The expansion and contraction of a causes the hanger assembly 24 together with the slide frame 22c to move up and down with respect to the overhanging beam 21.

The hanger assembly 24 is provided with a hanger frame 24b having a pair of left and right brackets 24a through which both guide shafts 22f are slidably inserted, and another bracket 24a fixed to the guide shaft 22f is provided. The hanger frame 24b is reciprocally driven to the left and right with respect to the tilt mast 22 by the horizontal cylinder 29 mounted over the bracket 22g.

In order to prevent the hanger frame 24b and the guide frame 22a from being worn, the hanger frame 24
A wear plate 24c is fixed to the rear surface of b. As shown in the perspective views of FIGS. 1 to 4, the hanger frame 24b is used.
Is formed into a stepped surface with its central portion retracted, that is, a stepped surface, that is, a pair of left and right inner clamps 26 for grasping the upper central portion of the form 31 shown in FIGS.
Is fixed, and outer clamps 27 are provided on the front surfaces of both left and right ends so as to be able to move up and down, and pull-up cylinders 28 that drive the outer clamps 27 to move up and down are provided.

As shown in FIGS. 4 to 6 and 8, each inner clamp 26 is formed in an L shape in a side view, and is a receiving fitting 26a fixed to the hanger frame 24b.
And a clamp cylinder 26b supported by a bracket 26a
And a pressing metal fitting 26c which is formed in an inverted L shape in a side view and is driven to move back and forth toward the lower side of the receiving metal fitting 26a by the clamp cylinder 26b.

Each of the outer clamps 27 is formed in a U shape in a side view, and has a receiving bracket 27a supported by the hanger frame 24b so as to be able to move up and down, a clamp cylinder 27b supported by the receiving bracket 27a, and a side view. Reverse L at
The holding metal fitting 2 which is formed in a letter shape and is driven forward and backward toward the lower side of the receiving metal fitting 27a by the clamp cylinder 27b.
7c and.

As shown in FIGS. 5 to 9, the formwork 31 is provided with a weir plate 31a and a plurality of (six in this case) horizontal reinforcing frames 31b arranged on the back surface of the formwork 31 at appropriate intervals in the vertical direction.
And a plurality of (five in this case) vertical reinforcing frames 31 arranged on the rear surface of the horizontal reinforcing frame 31b at appropriate intervals in the left-right direction.
c and a connecting frame 31d fixed to the back surface of the vertical reinforcing frame 31c
And a hanging frame 31e rotatably supported in the left-right direction in the middle part of the connecting frame 31d at appropriate intervals in the left-right direction, and an outer hanging shaft for connecting the upper end parts of the hanging frames 31e to each other. 31 f and an inner suspension shaft 31 g that connects the upper end portions of the three central vertical reinforcing frames 31 c to each other.

The outer hanging shaft 31f is slightly longer than the lateral width of the hanger frame 24b, and the inner hanging shaft 31g is slightly shorter than the lateral width of the stepped portion on the front surface of the hanger frame 24b.

Each vertical reinforcing frame 31c extends below the lower edge of the weir plate 31a, and as shown in FIG. 9, a portion slightly below the lower edge of the weir plate 31a is embedded in the existing concrete 32. Existing concrete 3 with sea bolt 33
2 and tighten the lower end of the jack bolt 34
By receiving the existing concrete 32,
It is fixed to the existing concrete 32.

A dummy bolt 35 is attached to the upper end of each vertical reinforcing frame 31c, and each dummy bolt 35
After a seabolt 33 used at the time of placing concrete in the upper stage is attached at a position lower by a predetermined height from above, concrete is placed on the existing concrete 32, for example, in three times.

After the cast concrete is solidified, the formwork lifting work vehicle is placed on the concrete and stopped near the formwork 31, and the outrigger 14 is extended to hold the self-propelled carriage 1 horizontally. Then tilt mast 22
Is tilted backward according to the tilt of the mold 31.

After that, the lifting cylinder 25 is shortened to lower the hanger frame 24b a little, and the lower side portions of the metal fittings 26a and 27a of the clamps 26 and 27 on the inner and outer sides are set to be closer to the suspension shafts 31f and 31g on the inner and outer sides. And the clamp cylinders 26b and 27b are shortened so that the holding metal fittings 26c and 27c are respectively attached to the inner and outer suspension shafts 31f and 31f.
Position higher than 31g.

After that, the formwork lifting work vehicle is further moved forward, and the horizontal cylinder 29 is expanded and contracted as necessary to adjust the horizontal position of the hanger frame 24b, and the hanging shafts 31f on both the inside and outside sides are adjusted. -31g is located between the receiving metal fittings 26a, 27a of the clamps 26, 27 on the inner and outer sides, and the holding metal fittings 26c, 27c, respectively, and then the clamp cylinders 26b, 27b are extended and the inner clamps 26 The intermediate portion of the suspension shaft 31f is clamped at two places, and the outer clamp 27 clamps both ends of the outer suspension shaft 31g.

Next, the outrigger 21e is extended and grounded, and the weight of the mold pulling attachment 2 and the mold 31 is prepared to be supported by the outrigger 21e, and then the mold 31 is released from the sea bolt 33 and the dummy bolt 35. At the same time, the jack bolts 34 are removed so that the formwork 31 supported by the clamps 26 and 27 on both inside and outside of the formwork lifting work vehicle can be moved.

After the formwork is ready to be pulled up in this way,
By shortening the tilt cylinder 23 and tilting the tilt mast 22 further rearward, the formwork 31 is peeled off from the concrete.

When the pull-up cylinder 28 is shortened and the outer clamp 27 is moved upward when the form 31 is peeled off from the concrete, a force is applied to the form 31 so that the form 31 bows upward. , The left and right side portions of the form frame 31 that tend to bow downward due to its own weight are prevented from hanging down, and the left and right side portions of the form frame 31 can be reliably separated from the existing concrete 32, and the separated mold The left and right sides of the frame 31 are prevented from contacting the surface of the existing concrete 32 and damaging the existing concrete 32.

After removing the formwork 31 from the concrete,
The lift cylinder 25 is extended to extend the hanger assembly 24.
Is moved up to move the formwork 31 to the height of the next stage. After moving the mold 31 to the next step height, the tilt cylinder 23 is extended to raise the tilt mast 23 until the lower part of the weir plate 31a contacts the existing concrete, and then the sea bolt 33 and the jack bolt 35 are used. After tightening the formwork 31 on the concrete, the lift cylinder 25 is shortened a little, and the brackets 2 of the clamps 26 and 27 on both the inside and outside are received.
Lifting shafts 31f and 31 on both the inner and outer sides of the lower side of 6a and 27a
It is positioned lower than g and each clamp cylinder 2
6b and 27b are shortened, and each holding metal fitting 26c and 27c
Is positioned higher than the suspension shafts 31f and 31g on the inner and outer sides.

After this, the tilt cylinder 23 is further extended a little to release the suspension shafts 31f and 31g on both the inner and outer sides from the clamps 26 and 27, and then the outrigger 14 and the outrigger 21e are shortened to remove the form lifting work vehicle. Are evacuated to a place that will not interfere with the next concrete placement.

In the above-described embodiment, the hanger assembly 24 is configured to be lifted and lowered by the lift cylinder 25. However, the lift drive device for lifting and lowering the hanger assembly 24 is not limited to a cylinder, and a motor and a drive driven by the motor are used. Even if a lifting drive device is constructed with a winch or the like, a screw shaft that is screwed into the hanger assembly 24 so as to be screwed back and forth, a motor and a chain that is driven by the motor and that is connected to the hanger assembly 24 are provided. Good.

Further, the mechanism for driving the tilt mast 22 and the mechanism for expanding / contracting the overhanging beam 21 are not limited to the hydraulic cylinders, and well-known drive mechanisms such as a motor and a gear mechanism, a crank mechanism, a link mechanism, and a chain are appropriately combined. Different drive mechanisms can be used.

Of course, the length of the overhanging beam 21 may be fixed to omit the telescopic cylinder 21d, or the tilt mast 22 may be omitted.
The tilt cylinder 23 can be omitted by fixing the tilt angle of the horizontal cylinder 24c, or the horizontal cylinder 24c can be omitted by fixing the elevating frame 24a of the hanger assembly 24 to the hanger frame 24b.

However, when fixing the tilt angle of the tilt mast 22, it is possible to separate the formwork from the concrete by advancing the self-propelled carriage 1 in order to separate the formwork from the concrete. It is preferable that the beam 21 is configured to be expandable and contractable, and the outrigger 21e is configured to slidably support the overhanging beam 21 in order to improve work safety.

The inner clamp 26 is the outer clamp 27.
It is necessary to press the center of the formwork 31 from above so that the center part of the formwork 31 is not lifted when it is raised. However, if the outer clamps 27 are capable of lifting both side parts of the formwork 31, respectively. Therefore, in the above structure, the receiving metal fitting 26a of the inner clamp 26, the pressing metal fitting 27c of the outer clamp 27, and the clamp cylinder 27b can be omitted.

Although the two inner clamps 26 are used in the above embodiment, one or more inner clamps 26 may be provided. Furthermore, the outer clamp 2
It suffices for 7 to form a left-right pair, and an even number of outer clamps 27 of 4 or more may be provided.

[0048]

As described above, in the formwork lifting attachment of the present invention, the hanger frame in which the hanger assembly is liftably supported by the overhanging beam through the tilt mast, and the hanger frame is supported by the hanger frame,
An inner clamp that supports the upper center portion of the mold, a pair of left and right outer clamps that support the left and right upper portions of the mold in front of the left and right outer sides of the inner clamp, and a pull-up device that raises and lowers each outer clamp are provided. .

Therefore, when the formwork is lifted, the center part and both side parts of the upper part of the formwork are clamped by the inner clamp and the outer clamp, and the outer clamp is raised.
A force is applied to the formwork so that it bends upward in a bow shape, so that it is possible to prevent sagging of both ends of the formwork that tries to bend down like a bow due to its own weight. Contact with the surface is prevented, and damage to concrete due to contact with the formwork can be prevented.

[Brief description of drawings]

FIG. 1 is a side view of a formwork lifting work vehicle according to an embodiment of the present invention.

FIG. 2 is a plan view of a formwork lifting work vehicle according to an embodiment of the present invention.

FIG. 3 is a front view of a form lifting work vehicle according to an embodiment of the present invention.

FIG. 4 is a perspective view of a hanger assembly according to an embodiment of the present invention.

FIG. 5 is a perspective view of a hanger assembly and a mold according to an embodiment of the present invention.

FIG. 6 is a front view of a hanger assembly and a mold according to an embodiment of the present invention.

FIG. 7 is a plan view of a tilt mast, a hanger assembly and a mold according to an embodiment of the present invention.

FIG. 8 is a side view of a hanger assembly and a mold according to an embodiment of the present invention.

FIG. 9 is a side view of a mold lifting work vehicle and a mold according to an embodiment of the present invention.

[Explanation of symbols]

 1 Self-propelled carriage 2 Form lifting attachment 21 Overhanging beam 22 Tilt mast 23 Tilt cylinder 24 Hanger assembly 24b Hanger frame 25 Lifting cylinder 26 Inner clamp 27 Outer clamp 28 Pullup cylinder 31 Formwork

Claims (3)

[Claims] 1. An extension beam supported by a self-propelled carriage, a tilt mast at a front end portion of the extension beam, a hanger assembly movably supported by the extension beam via the tilt mast, and a hanger assembly. In a frame lifting attachment including a lifting drive device for lifting and lowering, a hanger frame in which the hanger assembly is supported so as to be vertically movable by an overhanging beam through the tilt mast, and a hanger frame that is supported by the hanger frame and is located above the center of the mold. And a pair of left and right outer clamps that support the left and right upper portions of the formwork in front of the left and right outer sides of the inner clamp, and a pull-up device that raises and lowers each outer clamp. Form lifting attachment. 2. The form lifting attachment according to claim 1, wherein a plurality of two sets of inner clamps are arranged on the left and right at appropriate intervals. 3. A formwork lifting work vehicle comprising a self-propelled carriage and the formwork lifting attachment according to claim 1.