JPH03216305A - Device for automatically tightening and loosening shuttering for concrete column - Google Patents

Abstract

PURPOSE:To enable the reliable work of tightening and loosening a shuttering automatically in a short period of time by a method wherein supporting trucks are provided in parallel in the width direction of the shuttering to adjust the distance between the supporting trucks that can be freely expanded and contracted, the shuttering is moved vertically by lifting gears having proper intervals between them, and spaces are provided at the central portions of the supporting trucks to slide the connecting plates of a lower shuttering with the aid of forked bars. CONSTITUTION:A shuttering 8 is set on lifting gears 5 disposed between supporting trucks 1 in such a state that the flanges 9 or upper and lower shutterings 8b, 8a are joined together. In this case, a type of concrete columns is selected in order to correspond to several kinds of the shutterings 8 different in diameter and, according to instructions based on the selection, a distance between the supporting trucks 1 is expanded or contracted in a crosswise direction by a distance adjusting means 4. Thereafter, the lifting gears 5 are lowered, while setting the shuttering 8 thereon, to support connecting plates 10 disposed on the lower shuttering 8a on the forked bars 6 of the supporting trucks 1 opposed to each other, and the forked bars 6 are moved by hydraulic cylinders 2 which extend or retract in the longitudinal direction of the supporting trucks 1. Accordingly, the connecting plates 10 are slid to allow the wedges of the shuttering to be engaged or disengaged, and the upper shuttering 8b and the lower shuttering 8a are tightened or loosened.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a tightening and loosening device for formwork in concrete columns, and in particular, a device for tightening and loosening formwork without labor. This invention relates to a formwork automatic tightening/loosening device.

[Prior art] Conventionally, when forming a concrete column, a flange is provided at the joint of a split formwork consisting of an upper and lower formwork, and after the flanges are fastened with bolts and nuts, concrete is poured into the formwork. ing. After molding, the bolts and nuts are loosened again to separate the upper and lower molds. Of course,
Tightening and loosening the bolts and nuts is time-consuming, especially in the case of long formwork, as a large number of bolts and nuts are used.
It takes a lot of time and effort to tighten and loosen them individually.

Several proposals have been made to easily tighten and loosen the formwork. For example, Japanese Patent Application No. 61-034877 and Japanese Patent Application No. 63-289383 can be cited, but as shown in attached Figure 7, in both cases the flange (42) of the formwork (41) (
42) and the connecting plate (4
3) and attach the wedges (45) (4) to the lower ends of the bolts (44) (44) installed on the upper formwork (4lb).
5) Insert... and fasten the upper and lower formwork (4]s) (4lb). There is. In addition, the code|symbol (46) is a tire for transferring a formwork (4l).

[Problems to be Solved by the Invention] Among the conventional formworks described above, the work of tightening and loosening the formwork can be performed extremely easily in the formwork in which the connecting plate is slid to engage the wedge with the bolt. However, when tightening and loosening the formwork, manual work is required for setting and positioning the formwork, moving the formwork, etc., and automation has been desired.

Therefore, a technical problem arises that must be solved in order to easily and quickly tighten and loosen the formwork of the concrete column and to automate the tightening and loosening work of the formwork, and the present invention solves this problem. It was proposed for this purpose.

[Means for Solving the Problems] This invention has been proposed to achieve the above object, and involves fixing flanges at the joints in the longitudinal direction of a two-split formwork consisting of an upper and a lower formwork. , insert the bolts provided on the flange of the upper formwork into the through holes drilled in the flange of the lower formwork, fix the wedges to the connecting plate provided on the flange of the lower formwork, and attach this connecting plate to the lower formwork. A device for tightening and loosening the formwork of a concrete column, which is formed to be slidable in the longitudinal direction of the frame, and in which a wedge can be engaged and detached from the chamfered portion of the lower part of the bolt, and the support cart is installed in the width direction of the formwork. are arranged in parallel facing each other, and a width adjustment device is provided between the supporting carts to allow the formwork to expand and contract in the width direction, and a lifting device for the formwork is provided at appropriate intervals in the longitudinal direction between the supporting carts. A hydraulic cylinder is pivotally attached to both longitudinal ends of the support cart, the support cart is divided into two in the longitudinal direction, and a gap is provided in the center of the support cart. Automatic formwork tightening in a formwork for a concrete column, characterized in that a fork bar for sliding a connecting plate in the longitudinal direction is provided on each support cart, and the hydraulic cylinder is attached to one end of the fork bar. The purpose is to provide a loosening device.

``Operation'' The formwork of the concrete column is placed on a lifting device installed between support carts, with the flanges of the upper and lower formworks joined together. Here, a product selection is made in order to accommodate several types of formwork with different diameters, and based on the instructions, the support carts are moved in the width direction of the formwork, and the dimensions between the support carts are expanded or contracted as appropriate to set the specified dimensions. do. Thereafter, the elevating device descends with the formwork placed thereon, and the connecting plates provided on the lower formwork are supported by the respective fork bars of the opposing support carts. Then,
The left and right connecting plates of the formwork are supported by fork bars,
A hydraulic cylinder expands and contracts in the longitudinal direction of the support truck to move the fork bar. Therefore, the connecting plate slides to engage and disengage the wedges of the formwork, thereby tightening or loosening the upper formwork and the lower formwork. Furthermore, since the support cart is divided into two in the longitudinal direction, each fork bar is also divided into two and the length is shortened. For example, as shown in Fig. 1, the right side is tightened and loosened first, and then the left side is tightened and loosened. Therefore, the sliding resistance of each fork bar is reduced. Therefore, a small hydraulic cylinder can be used, and the movement error of the fork bar is minimized, so that reliable tightening and loosening operations can be performed.

[Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6 of the attached drawings. Figures 1 and 2 are general views of the formwork automatic tightening and loosening device, in which support carts (IXI) are arranged side by side facing each other in the width direction (X direction in the figure), and each support cart (+
Hydraulic cylinders (2) (2) are pivotally installed at both ends of the longitudinal direction (direction of arrow Y in the figure), and the support cart (1) is divided into two in the longitudinal direction, with a gap ( 3) is provided. Furthermore, a width adjusting device (4) (4) (4) (,!) is provided between the support carts (IXI) to adjust the width of the support cart (1).
(1) is formed to be expandable and contractible in the width direction, and a lifting device (5X
5) Arrange...

The support trolley (IXI) is provided with fork bars (6) (6), (6) (6) as shown in FIG. 3 so as to be slidable in the longitudinal direction. Fork claws (η (η...) are provided facing each other at predetermined intervals on the inner side of the fork claws (7) (7)...
supports the connecting plate 00) (shown in Fig. 2) provided on the flange (9) of the lower formwork (8a), and the fork claws (7) (7) are fixed symmetrically, respectively. Claw 0 of connecting plate 00
0 to slide the connecting plate 00) in the longitudinal direction. Note that the shape of the fork claw (7) should not be particularly limited to this, and may be appropriately set depending on the shape of the formwork (8), for example, an L-shaped claw (7a) or the like may also be used. Further, since the support cart (1) is divided into two in the longitudinal direction, the fork bars (6) (6) are also divided in the longitudinal direction, and the aforementioned hydraulic cylinders (2) (2), (2) (2
) is pivoted. Then, the width adjustment device (4) described later is installed.
), the support cart (IXI) expands and contracts in the width direction, and even if the width of the fork bars (6) (6) changes, the hydraulic cylinders (2) (2) rotate and the fork bars (6) ( 6) Sliding can be performed smoothly.

Next, the width adjustment device (4) will be explained with reference to FIGS. 4 and 5. The support carts (1) (+) are each erected on a frame υ (ψ), and the above-mentioned fork bar (6) is provided on the top of the support cart (1) so as to be slidable in the longitudinal direction. .Bracket 61 on the top surface of the frame υ
is fixed, and wheels <1 are mounted on both sides of the frame (b).
70 (14) (Y(&IO) is pivoted, and the C-shaped rails (ノ(ω
Wheels (14), (2), and (2) are moved inside the frame, and the frame and support cart (1) are formed so as to be movable in the width direction.

In addition, a mounting plate (peak) is installed approximately in the center of the rail (no), a bearing part (1) is fixedly mounted, and the central part of the rotating shaft is pivotally attached to this bearing part (c). A right-handed threaded portion (211) and a left-handed threaded portion (2lb) are symmetrically carved on both ends of the shaft (1), and a nut portion pivoted to the bracket Ql (II) is formed.
221) and (22b). Furthermore, the rotation axis (
A subrocket (c) is fitted near the bearing part (+11) of the deceleration motor (b), which is fixed to the side of the rail (r7).
A chain (G) is wrapped between the subrocket (C) and the subrocket (B).

Therefore, the rotation axis (to) is driven by the deceleration motor (d).
Rotate left or right to remove the nut parts (22s) (22b).
) to move the frame (0υ in the width direction along the rail @ (b). Therefore, the connecting plate θ provided on the flanges (9) (9) of the formwork (8) is supported. In order to do this, even if the formwork has different diameters, the support trolley (IXI
) in the width direction, the fork claw (7) (
The distance between η can be adjusted by expanding or contracting.

Incidentally, the symbol ah is an encoder provided coaxially with the deceleration motor (d), which controls the rotation of the rotary shaft (1) while emitting pulse signals and counting the number of rotations of the deceleration motor (d). It is provided to accurately adjust the amount of movement of the support cart (+) (+).

Next, the elevating device (5) will be explained with reference to FIG.

A support frame (to) is erected facing the foundation (+119 (IF)) of the floor (1→), and the lower part of each support frame (a) is connected by a bottom plate (to).The above support Insert the slide frame (To) between the frames (To) and attach the hydraulic cylinder (O) to the bottom plate (To) via the bearing 01), and slide the tip of the hydraulic cylinder (A). It is loosely inserted into the frame (7), and the slide frame (to) is formed to slide in the vertical direction by the expansion and contraction of this hydraulic cylinder (to).The upper part of the slide frame (to) is provided with a roller. (To) (C) are pivotally mounted facing each other in the width direction, and plates (B) and (B) with V-shaped notches in side view are fixed to the inside thereof, and a pedestal (G) is attached.
is installed protrudingly. Further, a pair of tire receiving plates (self) and (self) are protruded from the inner side of the support carts (1) and (+) so as to face each other.

Then, formwork (
Insert the tire (b) from 8) and bring it into contact with the roller @ (to), and place both left and right sides of the tire (a) onto the tire receiving plate (to).
It is inserted between (to) and (a) and (to), and the angle (to) protruding from the lower surface of the formwork (8) is supported by the cradle (to). The formwork (8) supported in this state rises to the position shown by the chain line as the hydraulic cylinder (self) expands, and descends to the original position when the hydraulic cylinder (self) contracts.

In one embodiment of the present invention, when tightening and loosening the formwork, first, the lifting device (5) is moved up to the support cart (+) (1).
The formwork (8) is moved from another working position using a crane or the like. Here, in order to correspond to several types of formwork with different diameters, a product type is selected, and the support cart (IXI) is expanded or contracted according to the command. Next, as shown by the dashed line in Figure 2, the formwork (
Insert the tire (1) of 8) and bring it into contact with the roller @ (to), and as mentioned above, use the cradle (a) of the lifting device (5) to adjust the angle (to) of the bottom surface of the lower formwork (8l). ). Then, contract the hydraulic cylinder ◇l) of the lifting device (5),
If the formwork (8) is gradually lowered as shown by the chain line (c), the left and right sides of the tire (to) will be inserted between the tire receiving plates (1) as described above. , Furthermore, the dashed line (ψ
As shown in , lower the formwork (8) to a predetermined height, and connect the connecting plates 00)0Φ of the flanges (9) to the fork bar (
6) Support the fork claws (7) (7) of (6).

In this way, the formwork (8) is placed on the support cart 0) (1), and then the fork bar (6) is slid in the longitudinal direction by the expansion and contraction of the hydraulic cylinder (2). At this time, the tire (b) of the formwork (8) comes into contact with the tire receiving plate (1) (to) and a reaction force is generated, which suppresses the movement of the formwork (8) and prevents the movement of the fork bar (6). easily done. Thus, the fork claws (7) (7)... are the claws (I1) (l) of the connecting plate 00.
1) By engaging with... and moving the connecting plate 00) in the longitudinal direction, the wedge (not shown) provided on the connecting plate 00) of the lower formwork (8a) and the upper formwork (8b) bolt (
b) are engaged or disengaged to fasten or loosen the lower formwork (83) and the upper formwork (8b). At this time, as shown in Fig. 1, the support cart (1) was divided into two in the longitudinal direction, and in order to tighten and loosen the right side first, and then tighten and loosen the left side, the fork bars (6) and (6) were attached to the respective fork bars. is an independent hydraulic cylinder (
2X2) is installed, and the fork bar (6) (6
) is divided into two parts, which reduces sliding resistance, allows for extremely smooth sliding, and reduces errors in travel distance. After the tightening and loosening work is completed, the formwork (8) is raised again, and at the position indicated by the chain line in Figure 2, the formwork (8) is moved to a work site for another process using a crane or other transport means. .

Note that this invention can be modified in various ways without departing from the spirit of the invention, and it goes without saying that this invention extends to such modifications.

[Effects of the Invention] As described in detail in the above-mentioned embodiment, this invention automatically sets and tightens and loosens the formwork after placing the formwork on this device, which saves manual labor. Tightening and loosening work of formwork can be completed in a short time. In addition, the support cart is divided into two parts, and the right and left sides are slid separately for tightening/loosening work, so the length of each fork bar is also divided into two and shortened, reducing the sliding resistance of the fork bar. , the reaction force of the formwork tire can be reduced. Therefore, deformation of the formwork tire portion can be prevented, movement errors can be reduced, and tightening/loosening work can be performed reliably, and a small hydraulic cylinder can be used.

In this way, the present invention has various effects such as increasing work efficiency, reducing personnel costs, and significantly improving efficiency while maintaining work reliability.

[Brief explanation of drawings]

1 to 6 show one embodiment of the present invention, in which FIG. 1 is a plan view showing the entire device, FIG. 2 is a side view of the same, and FIG. 3 is a partially cutaway view of the fork bar. 4 is a plan view of a main part of the width adjustment device, FIG. 5 is a sectional view taken along the line A--A in FIG. 4, and FIG. 6 is a longitudinal sectional view of a main part of the lifting device. FIG. 7 shows a conventional example and is a side view of the formwork. (1)...Support cart (3)...Gap (5)...Elevating device (8)...Formwork (8b)...・-・Upper formwork 00)・・・Connecting plate (2)・・・Hydraulic cylinder (4)・・・・Width alignment device (6) 1・・1・Fork bar (8a)...Lower formwork (9)...Flange (b)...Bolt patent Applicant: Nippon Conn.91-To Kogyo Co., Ltd. Komatsu Ltd.

Claims (1)

[Claims] A flange is fixed to each joint in the longitudinal direction of the two halves of the upper and lower formwork, and the bolts provided on the flange of the upper formwork are inserted into the through holes drilled in the flange of the lower formwork. A wedge is fixed to a connecting plate provided on the flange of the lower formwork, and this connecting plate is formed to be slidable in the longitudinal direction of the lower formwork,
A device for tightening and loosening the formwork of a concrete column in which a wedge can be attached to and removed from the chamfered portion of the lower part of the bolt, in which support carts are arranged side by side facing each other in the width direction of the formwork, and a distance between the support carts is provided. A width aligning device is provided at the support carts to allow the formwork to expand and contract in the width direction, and a lifting device for the formwork is provided at appropriate intervals in the longitudinal direction between the support carts, and both longitudinal ends of the support carts are provided. A hydraulic cylinder is pivotally attached to the support cart, and the supporting cart is longitudinally divided into two with a gap provided in the center thereof, and each fork bar is provided for sliding the connecting plate of the lower formwork in the longitudinal direction. 1. An automatic formwork tightening/loosening device for a formwork for a concrete column, characterized in that the hydraulic cylinder is attached to one end of the fork bar.