JPH02136207A - Apparatus for clamping and loosening retaining mold of concrete pole - Google Patents

Abstract

PURPOSE:To easily clamp and loosen long split retaining molds by clamping the flange clamping bolts of an upper retaining mold and opening through-holes to the flange of a lower retaining mold by drilling. CONSTITUTION:Clamping bolts 15, 15 are fixed to the flanges 13, 13 of an upper retaining mold at a predetermined interval and connection arms 16 are provided to the under surface of the flanges 14, 14 of a lower retaining mold to constitute a clamping and loosening apparatus. Each of the clamping bolts 15 is fixed to each flange 13 to be loosely engaged with a hollow cylindrical boss 18 and the upper part thereof is throttled into a square shape 19 to be loosely inserted in the washer 2 fixed to the upper surface of the boss 18. Therefore, the clamping bolt 15 is fixed without being revolved left and right. Since a connection arm claw 78 and a slide beam claw 3 are provided on the same axis of the clamping bolt, the connection arm 16 is hard to bend and suitable for a long article.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a formwork tightening and loosening device for concrete products, and particularly to a formwork tightening and loosening device that facilitates the fastening and loosening of long split formwork. It is related to.

[Prior art] Conventionally, when forming concrete and products, flanges were provided at the joints of split formwork consisting of upper and lower formworks, and after the flanges were fastened with bolts and nuts, concrete was poured into the formwork. ing. After molding, the bolts and nuts are loosened again to separate the upper and lower molds. However, it takes time and effort to tighten and loosen the bolts and nuts, and especially in the case of long formwork, a large number of bolts and nuts are used, so it takes a lot of time and effort to tighten and loosen them individually. It was necessary.

Several proposals have been made to facilitate tightening and loosening of the formwork. For example, a device described in Japanese Patent Application No. 61-034877 is shown in appendix FIGS. 11 to 14. In Figures 11 and 12, the upper formwork (1) and lower formwork (2) are separated]
, shows the state. Upper formwork (1) and lower formwork (2)
Flanges (3) and (4) are provided at the joints in the longitudinal direction of the upper formwork (+), a through hole (5) is bored in the flange (3) of the upper formwork (+), and a through hole (5) is bored in the flange (3) of the lower formwork (2). 4) is provided with a tightening bolt (6) to be inserted into the through hole (5). For this tightening, the bolt (6) is vertically movable and is normally recessed from the upper surface of the flange (4) by the spring (7).

When fastening the formwork, place the lower formwork (2) on the formwork pedestal, etc.
) and press the lower end (6a) of the bolt (6) upwards, then the upper end (6b) of the bolt (6)
) protrudes from the upper surface of the flange (4), and the bolt (6)'s second end (6b) protrudes into the through hole (5) of the flange (3).
) are inserted into the upper formwork (1) and the lower formwork (2). Then, the claw (P2) of the slide beam is brought into contact with the pin (PI) protruding from the side of the connecting arm (8), and the claw (P2) of the slide beam is pressed to release the connecting arm (8). Slide in the direction of the arrow
As shown in Fig. 4, the tightening means that the flange 9) fixed to the connecting arm (8) is fitted between the lower surface of the upper end (6b) of the bolt (6) and the upper surface of the flange (3). By,
The upper formwork (+) and the lower formwork (2) are fastened together.

[Problems to be Solved by the Invention] In the conventional formwork tightening and loosening device described above, the tightening bolt (6) is provided on the flange (4) of the lower formwork (2), and the tightening is Since the bolt (6) is formed to be able to move up and down, it is easy for concrete particles to enter the sliding portion of the bolt (6) during tightening. In such a case, the sliding part may get caught, rust may occur, or the spring (7) may become sagging, which may impede the downward movement of the bolt (6). be. Further, since there are many parts, processing costs and assembly costs increase, which increases costs, and the complicated structure makes it difficult to check the fit of the wedges (9) and to perform maintenance management.

Since the point of contact between the pin (Pi) of the connecting arm (8) and the claw (P2) of the slide beam is located at a position offset from the axis of the bolt (6), a couple is generated during sliding, and the connecting arm (8) may be bent.

Therefore, a technical problem arises that needs to be solved in order to increase the strength of the wedge and simplify the configuration by reducing the number of parts, and the present invention aims to solve this problem. It is something.

[Means for Solving the Problems] This invention has been proposed in order to achieve the above object, and includes providing a flange at the joint in the longitudinal direction of a split formwork consisting of an upper and lower lx formwork, A bolt provided on the other flange is inserted into a through hole drilled in one flange and fastened to the flange of the upper formwork in a concrete ball formwork tightening and loosening device that tightens and loosens the upper and lower formwork. For tightening, the lower part of the bolt protrudes to the bottom surface of the flange, and a part of both sides is chamfered so that it is parallel to the axial direction of the upper and lower formwork. At the same time as drilling a through hole, a connecting arm having an inverted U shape when viewed from the front is slid in the axial direction of the upper and lower formworks on the lower surface of the through hole of the flange, and further,
An elongated hole extending in the axial direction is drilled in the lower part of the through hole of the connecting arm, and the tightening is performed by fastening a wedge to be tightened and loosened on the chamfered part of the lower part of the bolt, over both side edges of the elongated hole. It is an object of the present invention to provide a concrete pole formwork tightening and loosening device characterized by the following features:

[Function] In this invention, a bolt is fastened to the flange of the two-form frame, and since the bolt is fixed, there are no moving parts, and the number of parts is reduced. To tighten, insert the lower part of the bolt into the through hole drilled in the flange of the lower formwork [-
While doing so, join the upper formwork and lower formwork. Thereafter, the connecting arm is slid in the axial direction of the lower formwork, and the wedge fixed to the connecting arm is fitted into the chamfered portion provided at the bottom of the bolt. The wedge is provided across the edges of both sides of the long hole drilled in the connecting arm 11, and together with the fact that the connecting arm is formed in an inverted U shape, the wedge is extremely strong. 3. There is no risk of bending or cracking. In addition, since the lower part of the bolt is chamfered on both sides, bending strength is improved and the precision of fitting with the wedge is also improved.

[Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 1O of the attached drawings. FIG. 1 is a side view showing the entire formwork θ0), and FIG. 2 is a front view thereof.

The formwork (10) is a cylindrical split formwork consisting of an upper formwork (11) and a lower formwork (1), and has flanges (1→(1 etc. and (14) )H.As will be described later, bolts (+'1) (1'i)... are fixedly tightened at predetermined intervals on the flange (1→(1)) of the upper formwork (11). The lower formwork (flange (1/I)) (Il
A connecting arm (10) is provided on the lower surface of o to constitute a tightening/loosening device.The reference numeral (r7) indicates a transfer tire fitted on the outside of the formwork (10).

Figures 3 to 7 are top and bottom! This shows the main parts of the tightening/loosening device with the frame θl) (+2 separated), and as mentioned above, the flange (1) is tightened with bolts (15) (one - The tightening is done by bolts (one is a hollow cylindrical boss fixed to the flange (1), and the L part is loosely fitted to the flange (1). Square shape (n), fixed to the upper surface of the boss (7) washer (
b) is loosely inserted. The bolts (one is fixed without rotating from side to side) are tightened by cutting a threaded part (21) into the upper end of the two bolts θ, and this threaded part 01 ) to tighten Natsuto @ (a). In addition, the tightening is performed using the flange (the lower part of 159 is a chamfered part (c) on a part of both sides so as to protrude to the lower surface of the flange (1) and parallel to the axial direction of the formwork (10)). The boss (in the cavity inside the tank) is tightened with a bolt (
1 adjustment allowance, nut @ (2) of screw part (21)
The tightening is performed by moving the bolt 0→ up and down to finely adjust the height position of the chamfered portion.

On the other hand, the flange (1) of the lower formwork (1) has a through hole (c) drilled directly under the bolt θ for the tightening, and the aforementioned connecting arm (10) is also provided on the lower surface of the flange (14). establish.

The connecting arms (10 have an inverted U-shape when viewed from the front, and the formwork (10
) is drilled into a long hole (1) extending in the axial direction. A wedge Q′+ with a slope extending over both side edges of this elongated hole (1)
Weld 5. Both sides of the wedge (7,'l) have long holes (
The wedges (A) are connected at the rear to form a substantially U-shape when viewed from below, and the lower surface of the wedge (C) is sloped so that both sides are narrow (in the direction of arrow Y in Figure 3). Further, connecting arm claws (A) (to) are vertically provided at appropriate positions of the connecting arm (1119).
Protruding from both sides of formwork θ Takumi [Also brackets (A) (A)
By moving the slide beam (→) back and forth in the axial direction of the formwork (10), the slide beam protruding from the top surface of the slide beam (7) The claw 01)GI) is formed so that it engages with any of the above-mentioned connecting art claws (A), and the connecting arm (+119) can be slid back and forth.At that time, when the bracket (C) The guide piece (16) fixed to the upper surface is loosely fitted inside the connecting arm (10) and serves as a guide for the connecting arm (16) to ensure smooth sliding.

The tightening is done by attaching the lower part of one bolt to the flange (H).
) through the through hole (A), join the flange (I→ of the upper formwork (11) and the flange (k?) of the lower formwork (1■). The bottom is a through hole (G)
The slide beam (1) is then pushed in the axial direction by a separately provided cylinder (not shown) or the like. For example, as mentioned above, when the connecting arm (10) moves forward (in the direction of arrow Y), the wedge Q force tightens the bolt (10).
It is inserted into the chamfered part (C) (C) of (C).

Thus, as shown in Figs.
The wedge Q fits firmly and tightly, and the upper formwork (11) and the lower 7F1.1 frame θ are fastened together. Incidentally, the flange (l) is interposed with a gasket (g) between the stations.

Then, the first
As shown in Figures and Figure 2, a transfer tire (0) is fitted and transported to the work site to form concrete.Then, if the cylinder is driven in the opposite direction, the result will be the opposite of the above. Connecting arm (IQ is backward (direction of arrow Z in Figure 8))
When the wedge Q is tightened, it will separate from the bolt (one chamfered part (c)) and become unfitted.
When the formwork (11) is lifted, it separates from the lower formwork (12),
Concrete products can be demolded. The connecting arm claw (a) and slide beam claw 01) are
Since the tightening mechanism is provided on the same axis as the pole l-(15), a couple will not be generated when both claws come into contact and are pressed, and the connecting arm (IF) will not bend. It's hard to do.

"Effects of the Invention" According to the present invention, bolts are fastened to the flange of the upper formwork, and through holes are drilled in the flange of the lower formwork. Since the bolts are fixed, the number of parts can be reduced compared to conventional types, and even if mud etc. overflow during concrete molding, the bolts are fixed to the upper formwork. ,
There is no problem in working. In addition, the point of action for sliding the connecting arm is tightened on the axis of the bolt, so no couple is generated during sliding, and there is no risk of the connecting arm bending or cracking during operation. When tightening, the fitting accuracy with the chamfered portion of the bolt is also significantly improved. Furthermore, since the configuration is simplified, processing costs and assembly costs are low, contributing to cost reduction, and parts such as connecting arms can be easily replaced, making maintenance easier. This invention has various effects.

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.

[Brief explanation of the drawing]

Figures 1 to 10 show one embodiment of the present invention, with Figure 1 being a side view showing the entire formwork, Figure 2 being a front view of the same, and Figure 3 showing the formwork separated. 4 is a sectional view taken along line A-Δ of FIG. 3, FIG. 5 is a sectional view taken along line D-D of FIG. 4, and FIG. 6 is a sectional view taken along line 3 of FIG. 7 is a sectional view taken along line C-C of FIG. Figure 8 is a sectional view taken along line E-E, Figure 10 is I-F in Figure 9.
FIG. 11 to 14 show a conventional example, in which FIG. 11 is a front view showing the main parts of the tightening/loosening device with the formwork separated, FIG. 12 is a side view of the main parts, and FIG. 1
FIG. 3 is a front view showing the main parts of the tightening/loosening device in a state where the formwork is joined, and FIG. 14 is a side view of the main parts. (10)...Formwork (l)...Lower formwork (one piece...tighten with bolts (c)...chamfered part (4)・-・・Long hole (II)・・・・Upper formwork (11H・・・Flange (10・・・Connection arm (G)・・・・Through hole )・・・・・・Wedge

Claims (1)

[Claims] A flange is provided at the joint in the longitudinal direction of the split formwork consisting of the upper and lower formworks, and bolts provided on the other flange are inserted into through holes drilled in one flange to tighten and loosen the upper and lower formworks. In the formwork tightening and loosening device for concrete poles, the lower part of the tightening bolt fastened to the flange of the upper formwork protrudes to the lower surface of the flange, and a portion of both sides is chamfered so that it is parallel to the axial direction of the upper and lower formwork. At the same time, a through hole for the tightening bolt is bored in the flange of the lower formwork, and a connecting arm having an inverted U-shape in front view is slidable in the axial direction of the upper and lower formworks on the lower surface of the through hole of the flange. furthermore, an elongated hole extending in the axial direction is bored in a lower part of the through hole of the connecting arm;
A formwork tightening and loosening device for a concrete pole, characterized in that a wedge for tightening and loosening is fixed to the chamfered portion of the lower part of the tightening bolt over both side edge portions of the elongated hole.