JPS60219367A - Slab concrete casting method and apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for placing slab concrete, and an apparatus therefor, in which a formwork support for pouring is combined with a cart to support it, and is carried to a pouring point and installed. The shoring is fixed in place, and the shoring can be quickly removed for reuse after concrete is poured.

Traditionally, when pouring slab concrete, a formwork supported by a number of supports is placed at the pouring point, the lengths of the supports are adjusted and the supports are fixed, and concrete is poured into the formwork. . In this case, supporting the formwork with pillars on site and fixing the pillars is complicated, so a shoring structure that is completely integrated with the formwork and the pillars has been developed, and wheels are attached to the pillars so that they can rotate (θ).
It started leaking. The formwork shoring assembly assembled in this manner can run via wheels to just below the point where the concrete slab is to be poured, so it can be easily transported to the pouring point. In addition, after separating the formwork several meters from the poured and solidified concrete to separate the edges from the concrete, the shoring assembly can be moved horizontally from the pouring point via wheels and discharged. By using this type of shoring, repeated pouring of slab concrete can now be done quickly. However, although this wheeled shoring can efficiently work on structures where slab concrete is poured horizontally one after another,
In earthquake-prone countries like ours, buildings have fairly thick beams to maintain their strength. Unless it is lowered, the shoring cannot be carried to the pouring point. In addition, even after pouring, the formwork support assembly cannot be removed from the pouring point unless the support is lowered until the formwork is lower than the bottom edge of the beam. Generally speaking, a jack is attached to the bottom end of the support, and it is possible to lengthen or shorten the support by several orders of magnitude, but the length of the support may vary depending on the thickness of the beam. It is impossible to make it longer or shorter without changing the support structure S. Furthermore, even if the support is provided with a mechanism that can easily lengthen or shorten the length t of the support, the structure of the support becomes more complicated.

Moreover, it is not possible to easily change the length of the struts supporting the formwork to be longer or shorter while maintaining the mounting attitude of the formwork at the site. Therefore, it is inconvenient to repeatedly transport the developed shoring assembly to and from the site when pouring slab concrete for a building with deeply hanging beams. .

The present inventor has constructed a cart that can lift and support a support structure consisting of a formwork and a support column, which can adjust the length of the column supporting the formwork and fix it at one adjustment position, at the slab concrete placement position. It would be possible to move the shoring without installing wheels on the support. In order for the trolley to support the shoring in such a way that it can move up and down, the trolley must be equipped with a table that can be raised and lowered, and when the table supports all of the shoring, the table is supported in a low position and transported to the work site, and the table is lifted up at the work site. This also suggests that if the length of the support is increased and the support is fixed to the entire floor surface in that state, the formwork will be in a horizontal state at a specified height, and concrete can be poured on top of the formwork. Misfire F! A't.

The main point of the present invention is to provide a formwork support for slabs, which comprises a formwork, at least a pair of supports that support the formwork, and a sliding rod that moves relative to the supports and holds the supports. A movable cart with an elevating table is moved between the supports, the table is raised to lift and support the shoring, and the cart is moved to the original concrete placement point, where the formwork reaches a predetermined height. The present invention provides a method for placing slab concrete in the formwork, which comprises raising the table to a maximum height and fixing the support by fixing the support and the sliding rod. When using this method, concrete can be poured even if the cart is under the shoring or after it has been moved from that position.

In addition, after the concrete is poured, the cart moves under the shoring and performs the opposite operation to the above, in other words, the shoring ball receiver raises the table to the position, receives the shoring that has peeled off from the concrete with the table, and then lifts the shoring that has separated from the concrete. By lowering the table while shortening its length, the cart can be ejected from the work area by passing under the beam without hitting the support beam.

The present invention also relates to an apparatus for carrying out the method, comprising: a formwork; at least a pair of supports supporting the formwork and having sheath pipes fixedly arranged in parallel at the bottom thereof; A slab formwork support comprising a sliding rod with a means for finely adjusting the length, and a table supports the support so that it can be raised and lowered. It is also a slab concrete placing device that consists of a combination with a cart with a table. An embodiment of the present invention will be described in detail below with reference to the drawings.

A large number of formworks (1) are fixed in parallel on top of the joists (2), intersecting with each other, and the joists are supported by C-shaped members (3
, 3α], and the C-shaped members are supported by the struts (4, 4
supported by a). Sheath tubes (cylindrical tubes) (5, 5a) are fixedly arranged in parallel outward at the lower end of each strut, and a sliding rod (6, 6a) is slidably fitted into the sheath tube. A plurality of pin holes are bored in the sliding rod. When the pin is inserted into the pin hole (7, 7a) and the lower end of the sheath tube (5, 56J) hits the pin and is supported, it is inserted into the formwork (1) through the support (4, 4α) as shown in Figure 1. ,・4 shows the state where it has risen and stopped.Also, if the pin inserted into the pin hole (7) hits the upper end of the sheath pipe (5), the state when raising and lowering the formwork is as shown in Figure 2. This will be described later.The lower end of each sliding rod is the base (9,
c+a) and the upper part following the base has a jitter <8.8
By operating the jack, you can fine-tune the length of the sliding rod, and by doing so, you can also fine-tune the height of the support from the ground. (10,1Oa) is a holding piece that slightly protrudes inward below the support and is supported by the table of the temporary cart.

Lll, 1lcL) is a banjo that connects the center of the joist and the support near the retaining piece. These members form the movable support of the present invention.

On the other hand, the trolley used in the present invention has two wheels (12
, 12cL), and the distance between the outer edges of the wheels on both sides is within the distance between the supports (4, 4αJ, and the outer edge of the table is The distance between the supports (4, 46) is within the distance between the supports (4, 46), and the length is such that both ends abut on the holding pieces (10, 10α), respectively.The tables (14) are pivoted approximately in the center of each other (1
7), and the underframe and table are pivoted on the same side (18, 1).
9), and is mounted on the underframe so as to be movable up and down by a pair of crossed arms (15.degree. 16) whose other ends are in sliding contact with the table and the underframe, respectively. The mechanism for raising and lowering the table top is one in which the arm (16) is pushed along the underframe by a push motion using hydraulic pressure or other electric power, and this push motion causes the arm (16
) is moved to the left along the underframe (13) from the position shown in Figure 1, the table (14) descends and approaches the underframe as shown in Figure 2, and vice versa. Underframe from position (13)
If you move the table to the right along the arrow, the table will rise to the position shown in Figure 1. However, the mechanism described here is merely an example, and other mechanisms may be used as long as the table can be raised vertically and horizontally with respect to the underframe.

Next, concrete slab pouring will be described using an apparatus consisting of a combination of a form support and a truck according to the present invention. First, remove all the pins from the pin holes (7, 7 cL) and lower the formwork support, resulting in the state shown in Figure 2. In this state, insert the sheath pipe (5
Insert the pin into the pin hole (7, 7α) that appears at the top of the sliding rod (6, 5α). Among the multiple pin holes provided along 6α), you can choose one of the pin holes on the sheath pipe.The table 't: ( 14cL) When the table is raised and the holding pieces (10, 10a) are lifted at both ends of the table, the cart supports the shoring body and also holds the sliding rod (6) by the sheath pipe (5).
) is also supported. In this lowered state, the upper side of the formwork (υ) can be lower than the lower side (21) of the beam (20), so
The cart carrying the shoring can be moved to the pouring position by passing under the beam. After moving to the pouring position and stopping the cart, when the pin is removed from the pin hole, the sliding rod (6° 6a) descends and the base (9, 9a) hits the floor.

When the table (14)' is raised, the shoring body turns its sliding rod 11 and rises by a distance equal to the lifting distance of the table, and the formwork (1) rises to a position almost suitable for pouring. In this state, insert the pin into the pin hole under the sheath tube (5,5αJ) and secure it with the lower edge of the sheath tube. Adjust the pin appropriately so that the formwork takes the optimal position. adjust.

In this state, slab concrete is placed on the formwork! J-) (22)
to be poured. This casting can be done by placing the cart under the shoring and supporting the cart, or by lowering the table and releasing the support from the cart, or by removing the support from the cart and pouring the cart. You may perform this after ejecting from the position. After the poured concrete has solidified, move the cart under the formwork support again, raise the table (14), and while supporting the support with the holding pieces (10, 10α), insert the pin into the sheath pipe (
5. Pull it out from the bottom of 5α) and peel the formwork from the concrete while supporting the shoring on the trolley. After cutting the edges of the formwork and concrete, lower the table and lower the shoring, and at the appropriate lowering position insert the pin into the sliding rod at the top of the sheath pipe (5, 5α) and engage it with the upper edge of the sheath pipe. Place the shoring integrated with the sliding rod and move the cart to the next concrete placement position.

Since the present invention uses a shoring structure that supports the formwork with posts equipped with sliding rods that can be fixed by moving relative to each other, it is possible to increase and lower the vertical distance of the shoring material, and the support material can be moved up and down from the trolley. Since the cart is moved by being supported by a table that moves up and down, it can be moved by lowering the upper side of the shoring formwork even in places where beams and window frames are stretched downward. Therefore, it is possible to move the formwork to the pouring point and install the shoring, or to separate the bunpo shoring from the trench 1 concrete placed on the trolley after concrete pouring, lower the height of the formwork, and move it to the next pouring position. It is also easy to move quickly and prepare for repeated pouring. Also, when raising and lowering the shoring itself, and when attaching the sheath pipes fixed and arranged side by side on the outside of the support to the suribaku rods, the suri that fits into the sheath pipes! The pin inserted into the bottle hole of the rod engages with the upper edge of the sheath pipe and is supported by the table, and engages with the lower edge of the sheath pipe to stand at the driving position. Therefore, there is no need to worry about aligning the holes of the sheath pipe and the slider rod when inserting pins in the same manner as in the past. It also helps increase the efficiency of shoring installation.

[Brief explanation of drawings]

Figure 1 is an elevational view showing the formwork support raised on a trolley at slab concrete placement position 1, and Figure 2 is an elevational view showing the formwork support raised on a trolley during movement. It is a one-sided elevation view showing the state. 1: Formwork 2: Joist 3.3a 20 sections 4.4α: Post 5.5G: Sheath pipe 6.6a: Sliding rod 7.7α: Pin 8.8a: Jack 9.9a: Pace 10.10α : Holding piece 13: Underframe
14:Table

Claims (6)

[Claims] (1) Between the supports of a formwork support for slabs, which is comprised of a formwork, at least one pair of support supports for the support support, and a sliding rod that moves relative to each support support to hold the support supports. A cart with a lifting table is moved, the table lifts and supports the shoring, the cart is moved to a concrete placement point, and the table is raised at 1, when the formwork reaches a predetermined height at that point. A method of fixing the support by fixing the supporting columns and sliding rods, and then pouring the slab comfleet onto the formwork. (2) Between the formwork, at least one pair of formwork support columns, and the above-mentioned columns of the formwork support for slabs, which are sliding rods and edges that move relative to each support column and hold the columns. A cart with a lifting table is moved, the table lifts and supports the shoring, the cart is moved to the initial point of concrete pouring, and the table is raised until the formwork reaches a predetermined height at that point. Then, the support column and sliding rod are fixed to fix the support structure, and the table is separated from the support structure, and the cart is ejected from the initial point, and concrete is poured onto the formwork, and concrete is poured onto the formwork. After solidification, the cart is moved again to the original point, the table is raised, and the shoring released from the concrete is supported on the table, and the table is lowered and the shoring is carried to another placement point. A slab concrete placing method that involves repeatedly ejecting the support cart from the original placement point. (3) a frame, at least a pair of supports with sheath pipes fixed and arranged in parallel at the bottom to support the formwork, and supports that fit into the sheath pipes so as to be fixed thereon and adjust the height of the formwork; A slab concrete placing device that can be repeatedly operated by combining a formwork support for slabs consisting of sliding rods that hold the support, and a cart with a table that supports the support so that it can be raised and lowered using an elevating table. (4) The concrete pouring device according to claim 3, wherein an inwardly directed holding piece is protruded from the support column so as to be supported by an elevating table. (5) the sheath tubes are arranged in parallel on the outside of the strut at the bottom of the strut;
The sliding rod has a plurality of pin insertion holes bored in the length direction,
4. The concrete placing device according to claim 3, wherein the pin inserted into the sliding rod engages with the upper edge or lower edge of the sheath pipe. (6) The concrete casting device according to claim 3 or 5, wherein the sliding rod is provided with a jack for finely adjusting the length at the lower part thereof.