JP3038292B2 - Formwork lifting attachment and formwork lifting vehicle - Google Patents

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 capable of lifting a wide form.

[0002]

2. Description of the Related Art For example, in dam construction work such as dam construction, concrete is poured into a formwork, solidified, and then a self-propelled crane truck is placed on the concrete, and the formwork is connected via a wire rope. Sling it on the crane hook,
Overhang a part of the crane's boom in front of the concrete, peel off the formwork from the concrete using a bar, etc. while tensioning the wire rope, and further lift the formwork to a predetermined height with a crane, The procedure of assembling the formwork as an upper formwork is repeated to form a bank body.

[0003] In this method, the formwork that has been peeled off from the concrete and suspended by a crane sways and collides with the concrete, possibly damaging the concrete. Therefore, the present inventor has proposed an overhanging beam supported by a self-propelled truck and a front end of the overhanging beam around a horizontal axis in the left-right direction so as not to swing the peeled formwork more than necessary. A tilt mast that is swingably supported, a tilt cylinder that drives the tilt mast, a hanger assembly that is supported by the tilt mast so as to be able to move up and down, and a lifting drive that drives the hanger assembly to move up and down. A form lifting attachment including a hanger frame supported by the tilt mast so as to be able to move up and down and a hanger pin supported by the hanger frame and engaged with and disengaged from the form has already been proposed (Japanese Patent Application No. 3-18 / 1990).
No. 6309).

[0004] In this form lifting attachment, the hanger pins which are engaged and disengaged from the form are supported by the bogie without passing through the wire rope, so that the longitudinal swing of the form can be reduced. Can be prevented from swaying back and colliding with concrete.

[0005]

However, according to the form lifting attachment according to the prior invention, when the width of the form is large, the form bends like an arc, and both ends of the form are separated from the concrete. It may not be at all, or both ends may shake and collide with concrete.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a form lifting attachment and a form lifting work vehicle capable of lifting a wide form. is there.

[0007]

As shown in FIG. 1, for example, a form lifting attachment according to the present invention comprises an overhanging beam 21 supported by a self-propelled vehicle 1 and a support at a front end of the overhanging beam 21. The tilt mast 22 and the tilt mast 2
In order to achieve the above-mentioned object, in a form lifting attachment including a hanger assembly 24 supported to be able to ascend and descend to the overhang beam 21 via the extension 2 and an elevating drive device 25 for driving the hanger assembly 24 to elevate and lower. We have taken such measures.

That is, a hanger frame 24b in which the hanger assembly 24 is supported by the tilt mast 22 so as to be able to move up and down, and an inner clamp 26 supported by the hanger frame 24b and supporting an upper central portion of the formwork 31.
And a pair of left and right outer clamps 27 supporting upper left and right sides 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
And a form withdrawal attachment.

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

[0010]

According to the present invention, the formwork is supported at its upper center by the inner clamp 26 and at the outer clamp 27.
The formwork 3 is located in front of the left and right outer sides of the inner clamp 26.
1 is supported on the upper left and right sides. Then, by driving the outer clamp 27 upward by the pull-up device 28, a force is applied to the mold frame 31 in the direction of bending the mold frame 31 upward in a bow shape, and the mold frame attempts to bend upward in a bow shape by its own weight. 31 can be reduced.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a form lifting work vehicle using a form lifting attachment according to an embodiment of the present invention.

FIG. 1 is a side view of a form-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 form lifting truck is composed of a self-propelled carriage 1 and a form lifting attachment 2. The self-propelled carriage 1 has a frame 11, a traveling device 12 mounted on the lower side of the frame 11, and a rear part of the frame 11. A fixed weight 13, a pair of right and left outriggers 14 provided at the front of the frame 11, and a hydraulic system 15 shown in FIG. 2 are provided.

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

The front wheel 12f and the rear wheel 12r are each capable of turning by 180 ° around a vertical axis, and the steering cylinders 12a and 1 supported by the frame 11 are provided.
2b, and is rotated around each axle by a hydraulic motor.

That is, the front wheel 12f and the rear wheel 12r
Of the front wheel 12f and the rear wheel 12r in the front-to-rear direction, and the left and right axles of the front wheel 12f. The self-propelled trolley 1 is turned to the left or right by inclining the axle of the rear wheel 12r in the direction, or the extension line of the axle of the front wheel 12f and the rear wheel 12r is crossed at one point. So that it can be pivoted.

When a crawler 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 it is moved, it can be turned to the left and right greatly.
1 is mounted so as to be able to rotate 180 ° or fully, and while the left and right crawlers are pivoted 90 °, the frame 11 is pivoted 90 ° in the opposite direction, and then the left and right crawlers are rotated at the same speed in the same direction. 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
The pressurized oil is supplied and discharged from the
In order to maintain the horizontal, it is stretched and grounded on the concrete surface, and when running, it is shortened so as not to hinder the running so that it rises from 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 15b.
b, a pressurized oil supply pipe for supplying pressurized oil to the form lifting attachment 2, the traveling device 12, and the outrigger 14, and a pressurized oil from the form lifting attachment 2, the traveling device 12, and the outrigger 14 to the hydraulic oil tank 15a. And a drain pipe for causing the drainage to flow.

The hydraulic oil tank 15a is disposed 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 wheel 18 is raised behind the driver's cab 16.

The form lifting attachment 2 includes an overhang beam 21, a tilt mast 22, and a tilt mast 2.
A tilt cylinder 23 that swings and drives the lift 2, an elevating frame 24 that is supported by the overhanging beam 21 via the tilt mast 23 so as to be able to move up and down, an elevating cylinder 25 as an elevating drive device that drives the elevating frame 24 up and down, The apparatus includes 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 moving the outer clamp 27 up and down.

As shown in FIG. 1, the overhanging beam 21 is composed of a pair of telescopic beams 21a formed of inner and outer double square tubes supported on both right and left sides of the frame 11, and as shown in FIG. A connecting frame 21b for connecting the front portions of the inner tube of the inner tube 21a and a connecting frame 21c for connecting the front portions of the outer tube of the extensible beam 21a are provided. As shown in FIG. A telescopic cylinder 21d composed of a hydraulic cylinder that expands 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 the form lifting operation, and to form the form lifting attachment 2 and the formwork 31. In order to support the weight, it is extended and grounded on the concrete surface, and is shortened so as not to hinder the running during running, so that it rises from the concrete surface.

As shown in FIGS. 3 and 7, the tilt mast 22 includes a pair of left and right guide frames 22a.
Upper, middle and lower three-stage reinforcement frames 22b, a pair of left and right slide frames 22c, which are inserted into the guide frame 22a so as to be vertically movable, and a pair of slide frames 22c. A frame 22d is provided, and the guide frame 22a is swingably supported at the front end of the overhang beam 21 via a hinge 22e as shown in FIG.

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.
Is composed of a hydraulic cylinder, and a cylindrical body 25a is mounted on the guide frame 22a.
Is fixed, and a piston rod 25b protruding from an upper end of the cylindrical body 25a is connected to an 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 the two slide frames 22c, and the hanger assembly 24 is supported by these guide shafts 22f so as to be slidable in the left-right direction. Cylinder 25
The hanger assembly 24 moves up and down with respect to the overhang beam 21 together with the slide frame 22c due to the expansion and contraction of a.

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

Incidentally, in order to prevent wear of the hanger frame 24b and the guide frame 22a, 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 formed on a stepped surface whose central portion is receded, and a pair of left and right inner clamps 26 for grasping the upper central portion of the formwork 31 shown in FIGS.
Are fixed, and outer clamps 27 are provided on the front surfaces of the right and left ends so as to be able to move up and down, respectively, and a pull-up cylinder 28 that drives the outer clamps 27 to move up and down is provided.

As shown in FIG. 4 to FIG. 6 and FIG. 8, each inner clamp 26 is formed in an L-shape in a side view, and has a fitting 26a fixed to the hanger frame 24b.
And a clamp cylinder 26b supported by a receiving member 26a.
And a holding member 26c formed in an inverted L-shape in a side view and driven forward and backward by the clamp cylinder 26b toward the lower side of the receiving member 26a.

Each of the outer clamps 27 is formed in a U-shape in a side view, and has a metal fitting 27a supported up and down by a hanger frame 24b, a clamp cylinder 27b supported by the metal fitting 27a, and a side view. In reverse L
Pressing metal fitting 2 formed in a letter shape and driven forward and backward by the clamp cylinder 27b toward the lower side of the receiving metal fitting 27a.
7c.

As shown in FIG. 5 to FIG. 9, the formwork 31 is a weir board 31a and a plurality of (here, six) lateral reinforcing frames 31b arranged on the back surface thereof at appropriate intervals vertically.
And a plurality (five in this case) of vertical reinforcing frames 31 arranged on the rear surface of the horizontal reinforcing frame 31b at appropriate intervals in the left-right direction.
c, a connection frame 31d fixed to the back surface of the vertical reinforcing frame 31c
A suspension frame 31e rotatably supported in the left-right axis direction at an appropriate interval in the left-right direction at an intermediate portion of the connection frame 31d, and an outer suspension shaft connecting the upper ends of the suspension frames 31e. 31f, and an inner suspension shaft 31g that connects upper end portions of three central vertical reinforcing frames 31c.

The outer suspension shaft 31f is slightly longer than the horizontal width of the hanger frame 24b, and the inner suspension shaft 31g is slightly shorter than the horizontal 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 a portion slightly below the lower edge of the weir plate 31a is embedded in the existing concrete 32, as shown in FIG. Existing concrete 3
2 and jack bolt 34 at the lower end.
Is received by 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.
After the seabolt 33 used at the time of placing concrete in the upper tier is attached to a position lower by a predetermined height than the concrete, concrete is placed on the existing concrete 32, for example, in three times.

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

Thereafter, the lifting cylinder 25 is shortened, the hanger frame 24b is lowered slightly, and the lower sides of the metal fittings 26a, 27a of the clamps 26, 27 on both the inner and outer sides are connected to the hanging shafts 31f, 31g on both the inner and outer sides. And the clamp cylinders 26b and 27b are shortened, and the holding brackets 26c and 27c are connected to the suspension shafts 31f on both inner and outer sides.
Position higher than 31g.

Thereafter, the form-lifting vehicle is advanced, and the horizontal cylinder 29 is extended and contracted as necessary to adjust the position of the hanger frame 24b in the left-right direction. 31g is positioned between the receiving metal fittings 26a, 27a of the clamps 26, 27 on both the inner and outer sides and the holding metal fittings 26c, 27c, and then the clamp cylinders 26b, 27b are extended, and the inner clamp 26 Two intermediate portions of the suspension shaft 31f are clamped, and both ends of the outer suspension shaft 31g are clamped by the outer clamp 27.

Next, the outrigger 21e is extended and grounded, and the weight of the form lifting attachment 2 and the form 31 is prepared to be supported by the outrigger 21e, and then the form 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 form 31 supported by the clamps 26 and 27 on both the inside and outside of the form lifting work vehicle can be moved.

After preparation of the form is completed,
By shortening the tilt cylinder 23 and tilting the tilt mast 22 further rearward, the form 31 is peeled from the concrete.

When the pull-up cylinder 28 is shortened and the outer clamp 27 is moved upward when the mold 31 is peeled off from concrete, a force acting in a direction of bending the mold 31 upward in a bow acts on the mold 31. The hanging of the left and right sides of the mold frame 31 which is going to bow downward by its own weight is prevented, and the left and right sides of the mold frame 31 can be reliably separated from the existing concrete 32, and the separated molds The left and right sides of the frame 31 are prevented from contacting the surface of the existing concrete 32 to damage the existing concrete 32.

After peeling the formwork 31 from the concrete,
The lifting cylinder 25 is extended so that the hanger assembly 24
To move the formwork 31 to the height of the next step. After moving the formwork 31 to the height of the next step, the tilt cylinder 23 is extended and the tilt mast 23 is raised until the lower part of the dam plate 31a contacts the existing concrete, and then the seam bolt 33 and the jack bolt 35 are used. The mold frame 31 is fastened to concrete, and then the lifting cylinder 25 is slightly shortened, and the metal fittings 2 of the clamps 26 and 27 on both the inside and outside are reduced.
The lower sides of 6a and 27a are the suspension shafts 31f and 31 on both inner and outer sides.
g, and each clamp cylinder 2
6b and 27b, shortening each holding bracket 26c and 27c
Are positioned higher than the suspension shafts 31f and 31g on both the inside and outside.

Thereafter, the tilt cylinder 23 is further extended slightly 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 a place where it will not interfere with the next concrete placement.

In the above embodiment, the hanger assembly 24 is configured to be moved up and down by the elevating cylinder 25. However, the elevating drive device for driving the hanger assembly 24 up and down is not limited to the cylinder. The lifting drive device may be configured by a screw shaft that is screwed to the hanger assembly 24 so as to be able to advance and retreat, a motor and a chain driven by the motor and connected to the hanger assembly 24, a winch, or the like. Good.

The mechanism for driving the tilt mast 22 and the mechanism for expanding and contracting the overhang beam 21 are not limited to hydraulic cylinders, but may be any combination of known driving mechanisms such as a motor and a gear mechanism, a crank mechanism, a link mechanism, and a chain. It is possible to use a different drive mechanism.

Of course, the length of the overhanging beam 21 is fixed and the telescopic cylinder 21d can be omitted.
It is possible to omit the tilt cylinder 23 by fixing the inclination angle of, or to omit the horizontal cylinder 24c by fixing the elevating frame 24a of the hanger assembly 24 to the hanger frame 24b.

When the tilt angle of the tilt mast 22 is fixed, the formwork can be peeled off from the concrete by advancing the self-propelled vehicle 1 in order to separate the formwork from the concrete. It is preferable that the beam 21 is configured to be extendable and contractable, and that the outrigger 21e is configured to slidably support the overhanging beam 21 from the viewpoint of enhancing work safety.

The inner clamp 26 is connected to the outer clamp 27.
Is required to be pressed from above so that the central portion of the formwork 31 is not lifted when raised. However, if the outer clamps 27 are capable of lifting both side portions of the formwork 31, Therefore, in the above configuration, the metal fitting 26a of the inner clamp 26, the metal fitting 27c of the outer clamp 27, and the clamp cylinder 27b can be omitted.

In the above embodiment, two inner clamps 26 are used, but one or three or more inner clamps 26 may be provided. Further, the outer clamp 2
7 may be a pair of left and right, and four or more even outer clamps 27 may be provided.

[0048]

As described above, the form lifting attachment of the present invention comprises a hanger frame in which a hanger assembly is supported by the overhang beam via the tilt mast so as to be able to move up and down, and is supported by the hanger frame.
An inner clamp that supports the upper center of the formwork, a pair of left and right outer clamps that support upper left and right sides 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 .

Therefore, when the form is lifted, the upper central part and both sides of the form are clamped by the inner clamp and the outer clamp, and the outer clamp is raised.
A force is applied to the formwork to bow the formwork upward, so that both ends of the formwork that tends to bow downward by its own weight are prevented from sagging, and as a result, the concrete on the left and right sides of the formwork Contact with the surface is prevented, and concrete damage due to contact with the formwork can be prevented.

[Brief description of the drawings]

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

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

FIG. 3 is a front view of a form lifting truck according to one embodiment of the present invention.

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

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

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

FIG. 9 is a side view of the form lifting vehicle and the formwork according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Self-propelled truck 2 Form lifting attachment 21 Overhang beam 22 Tilt mast 23 Tilt cylinder 24 Hanger assembly 24b Hanger frame 25 Elevating cylinder 26 Inner clamp 27 Outer clamp 28 Pull-up cylinder 31 Form

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kenzo Era 4-44, Kiyamachi, Himeji City, Hyogo Prefecture (56) References JP-A-5-112920 (JP, A) JP-A-2-132100 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B28B 17/00 E02B 7/00 E04G 11/22

Claims (3)

(57) [Claims] An overhanging beam supported by a self-propelled vehicle, a tilt mast at a front end of the overhanging beam, a hanger assembly supported by the overhanging beam via the tilt mast, and a hanger assembly. A form lifting attachment including a lifting drive device for raising and lowering, wherein a hanger frame in which the hanger assembly is supported by the overhanging beam via the tilt mast so as to be able to move up and down, and which is supported by the hanger frame and has a central upper portion of the formwork , A pair of left and right outer clamps supporting upper left and right sides of the form in front of the left and right outer sides of the inner clamp, and a pull-up device for raising and lowering each outer clamp. Formwork lifting attachment. 2. The form lifting attachment according to claim 1, wherein a plurality of two sets of inner clamps are arranged at appropriate intervals on the left and right. A form lifting work vehicle comprising a self-propelled carriage and the form lifting attachment according to claim 1 or 2.