JP2999292B2 - Concrete casting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete placing apparatus for moving concrete on a floor before concrete placement, for example, on a slab arrangement.

[0002]

2. Description of the Related Art In a construction work or the like, when concrete is cast on a wide floor surface, a reinforcing bar is arranged on a concrete slab, and concrete is cast thereon and leveled to form a concrete surface. It has been done.

[0003] Conventionally, concrete has been cast mainly after human arrangement depending on human power, and a flat concrete surface has been formed afterwards by a leveling machine or manually. Relying on manual work requires not only low work efficiency but also work on the arrangement of bars, which poses a problem in terms of safety.

Accordingly, assuming that the concrete is cast by mechanical means, a base of a bent arm in which a plurality of arms are connected by a joint so that the concrete can be bent in a horizontal plane is supported on a base. A flexible concrete casting hose is arranged along the arm, and the bent arm is bent so that the tip of the concrete casting hose is located at a required position on the floor surface, and concrete is poured. Some have been made to do so.

[0005]

However, according to the above-mentioned prior art, concrete can be cast at any desired location without being damaged by the reinforcement even on the floor where the reinforcement is arranged. Since the bending arm is cantilevered, the support at the base is loaded with the total weight of the bending arm, the concrete casting hose attached to it, and the weight of the concrete existing in this hose, The structure of the joint portion of the bent arm, including the structure of the support portion, must be extremely strong, and there is a problem in that the entire device becomes large-sized and heavy. For this reason, there has been a problem that it is not easy to install the apparatus and remove the work after the work is completed.

In view of the above, the present invention allows the tip of a concrete casting hose to be moved to a desired location by freely moving it even on a reinforcing arrangement without damaging it.
It is an object of the present invention to provide a concrete placing device in which the entire device including the hose support structure can be made small and small in strength.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention relates to a method of holding a concrete casting hose on a movable table movable on a floor on which concrete is to be cast. A large number of hose support units having portions are provided, and these units are connected to bend and rotate freely in a horizontal plane, and a telescopic member that can be telescopically expanded and contracted by remote control is connected between the left and right portions of these units. The unit is turned in an arbitrary direction in a horizontal plane by expanding and contracting in a horizontal direction.

[0008]

The concrete casting hose is held by the hose holding unit of each hose support unit of the hose support unit row, and the tip of the hose is made to protrude from the foremost end of the hose support unit row. The telescopic member on the right or left side of the portion to be bent and turned is shortened by remote control. At this time, if the right expandable member is shortened, the end of the hose turns rightward, and if the left expandable member is shortened, the hose turns leftward. Also, by simultaneously operating a plurality of expansion and contraction members according to the degree of turning, the turning can be made large, and the tip of the hose can be turned to the other side while turning in one direction, that is, the hose The support unit row can also bend and turn in a meandering manner, whereby the tip of the hose can be freely and quickly positioned at the concrete placing location, and the concrete placing operation can be performed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 4 shows a plan view of the entire structure of the concrete placing device according to the present invention, and FIG. 5 shows the same side surface.
FIG. 4 shows both a straight state and a bent state at the same time for easy understanding of the operation.

The concrete casting apparatus 1 comprises a plurality of hose support units 2, 2... Of the same structure which are connected to each other so as to be bent and swivel in a horizontal plane. 3 is supported.

The hose support unit 2 in the illustrated embodiment shows a case in which the hose is slid on a slab arrangement. FIG. 1 shows two planes for convenience, FIG. 2 shows the same side, and FIG. A gantry 6 supporting a hose holder 5 is vertically movably supported on the upper surface of a center of a sled-shaped movable base 4 whose periphery is bent so as to show a front view in which the same part is a cross section. In this supporting structure, a moving range of a supporting pipe 7 erected at the center of the upper surface of the moving table 4 and a supporting pipe 8 erected at the center of the lower surface of the gantry 6 are defined by pins 9 and slots 10. The gantry 6 is constantly urged upward by a compression spring 11 installed in a support pipe 7 on the moving table 4 to elastically support the gantry 6.

Hose holding part 5 provided on the gantry 6
Has an upward U-shaped frame 12 capable of receiving the concrete casting hose 3, and a projection 1 at a lower portion of the frame 12.
3 and 13 are slidably engaged and supported by sliding guides 14 and 14 installed in a direction perpendicular to the hose 3 on the gantry 6, and are supported by springs at the lower outer surface of the frame 12 and the end of the gantry 6. Compression springs 16, 16 are interposed between the receivers 15, 15, so that the frame 12 is always positioned at the center position, and absorbs the pulsation when the hose 3 pulsates.

A roller 17 for receiving the lower surface of the hose 3 is provided at a lower portion of the frame 12, and a
Rollers 18, 18 for regulating the side surfaces of the frame member 12, respectively, are rotatably supported. One end of a pressing member 19 is openable and closable by one of the pins 20 at the upper open portion of the frame 12. A roller 21 for regulating the upper surface of the hose 3 is pivotally supported on the lower surface side, and the hose 3 is inserted as tightly as possible into the interior surrounded by these rollers 17, 18, 18, 21. ing. The other end of the holding member 19 can be fixed to the frame 12 by the other pin 20 'when the holding member 19 is closed.

Connecting portions 22 and 23 are provided at the front and rear portions of the hose supporting unit 2, and the connecting pins 22 are inserted into the connecting portions 22 and 23 of the hose supporting units 2 and 2 to bend and turn freely. It is to be connected to.

Between the left and right portions of the hose support units 2, 2, left and right telescopic members 25, 25 are connected at positions away from the support pipe 8. As shown in FIG. 6, for example, as shown in FIG.
A tube 27 made of an inflatable material such as rubber is connected between the tubes 27. The tube 27 is expanded by supplying compressed air into the tube 27 to reduce the overall length. A support portion 28 provided on the lower surface,
28. Therefore, each elastic member 25, 25
Are connected to the pressure air supply / discharge pipes 29, 29. These pipes 29, 29 are collectively led to the last part of the hose support units 2, 2,... Desired telescopic members 25, 25 by remote control
To be selectively supplied with pressurized air from a pressurized air source. The elastic member 25 is not limited to the rubber tube 27 described above, but may have an air cylinder structure. In the figure, reference numeral 31 denotes a stopper that regulates a turning angle between the hose support units 2 and 2.

Next, the operation of the above embodiment will be described.

The concrete casting hose 3 is dropped into the frame 12 of the hose holding portion 5 of each of the hose support units 2, 2... Right and left rollers 17, 18, 1
The hose 3 is held by the hoses 8 and 21, and the distal end 3a of the hose 3 is projected forward from the tip end of the two rows of the hose support units 2 and 2 as shown in FIGS. After setting as described above, the ready-mixed concrete is supplied through the hose 3 and concrete is poured from the end of the hose 3 onto the slab arrangement.
When the concrete placement site is shifted, the hose support units 2, 2,... Are bent and turned so that the tip 3a of the hose 3 is directed to the concrete installation site.
In other words, when pressurized air is supplied to the right or left elastic member 25 on the right or left side of the portion to be bent and turned by remote control, the elastic member 25 expands as shown by a chain line at the top of FIG. One end side of the front hose support unit 2 connected thereto is pulled, whereby the expanded and contracted member 25 is bent and turned inside.
Therefore, if the right elastic member 25 is shortened, the hose 3
The tip 3a turns rightward, and turns leftward when the left elastic member 25 is shortened. .. Can be largely turned by simultaneously operating a plurality of elastic members 25, 25,... According to the degree of turning. If the tip 3a of the hose 3 is further turned to the other side while turning in one direction, the hose support units 2, 2,... Can be bent and turned in a meandering manner as shown in FIG. it can.

At the time of each of the bending and turning operations described above, the moving tables 4, 4.
Moves smoothly because it slides on the slab arrangement. When the ready-mixed concrete is pumped through the hose 3, pulsation occurs in the hose 3, and against the pulsation, the frame 12 of the hose holding portion 5 slides along the slide guides 14, 14 against the springs 16, 16. This prevents the hose 3 from being subjected to excessive force.

Thus, the concrete placing operation can be performed by freely and quickly positioning the tip 3a of the hose 3 at the concrete placing location.

When the elastic member 25 has a cylinder structure, it may be extended instead of shortened. Further, the structure of the hose holding portion 5 is not limited to the structure using four rollers, and a design change of the configuration such that the hose holding portion 5 is held by a piece having a semicircular inner peripheral surface divided into upper and lower parts. Optional. Further, in the illustrated embodiment, the case where the movable table 4 is formed in a sled shape is shown, but a structure in which the movable table 4 is moved by wheels when there is no arrangement of bars may be adopted. In addition, the shape and structure of each part are not limited to the illustrated embodiment.

[0022]

As described above, according to the present invention, the support of the concrete casting hoses on the floor on which the concrete is to be cast can be connected to each other so as to be bent and swiveled in a horizontal plane. The hose support unit is held by the hose holding portion of the hose support unit, and the expandable member connected between the left and right side portions of the hose support unit is selectively expanded and contracted so that the hose support unit row is bent and turned in a desired direction. As a result, the tip of the concrete casting hose can be quickly diverted to any desired location, and the work efficiency of the concrete casting work can be greatly improved. Also, since each hose is supported by a hose support unit that is grounded on the slab reinforcement or on the floor,
The weight is dispersed for each hose support unit, so that the load is not concentrated and the arrangement of the reinforcing bars and the like is not damaged. Furthermore, since the weight of each hose support unit is small, the additional work such as installation, removal, transportation and the like becomes extremely simple as compared with the prior art, and the construction period can be shortened. In addition, it is possible to cope with the size of the construction site only by changing the number of connected hose support units, and various effects such as versatility are obtained.

[Brief description of the drawings]

FIG. 1 is a plan view showing two hose support units constituting a concrete placing device according to the present invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a front view in which a part of FIG. 1 is sectioned;

FIG. 4 is a plan view showing an entire structure of an embodiment of a concrete placing device according to the present invention, and simultaneously showing a straight state and a bending turn at the same time for convenience.

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a side view showing an example of an elastic member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete casting apparatus 2 Hose support unit 3 Concrete casting hose 4 Moving table 5 Hose holding part 6 Stand 12 Frame 14 Sliding guide 19 Pressing member 22 Connecting part 23 Connecting part 24 Connecting pin 25 Telescopic member 30 Pressure air supply Discharge control section

Continued on the front page (72) Inventor Takeshi Okuda 8-21-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation Tokyo Main Store (72) Inventor Tateo Kawamura 8-21 Ginza, Chuo-ku, Tokyo No. 1 Takenaka Corporation Tokyo Main Store (72) Inventor Kazuo Yamazaki 1293 Atocho, Chiba-shi, Chiba Sanwa Kiki Co., Ltd. Chiba Plant (56) References Japanese Utility Model No. 5-52111 (JP, U) JP-A-4-59242 (JP, U) JP-A-59-38609 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04G 21/04

Claims (1)

(57) [Claims] 1. A large number of hose support units having a holding portion for a concrete casting hose are provided on a movable table movable on a floor on which concrete is to be cast, and these units can be bent and turned in a horizontal plane. A telescopic member that can be extended and contracted by remote control is connected between the left and right portions of the units, and the unit is turned in a horizontal plane in any direction by selectively extending and contracting the telescopic member. A concrete casting device characterized by the following.