JPH0327765Y2 - - Google Patents

Description

[Detailed description of the invention] - Industrial application field - This invention relates to a fastening device for concrete formwork, and is used to fasten movable side members such as side plates and end plates that can be opened and closed during formwork to fixed side members. The invention relates to a device.

-Prior Art- A fastening device using a toggle mechanism is well known as a fastening device for concrete formwork. A fastening device using a toggle mechanism has the advantage of being able to perform the fastening and opening operations in one motion and has a strong fastening force, but has the disadvantage that the movable stroke of the fastened member is limited. If an attempt is made to increase the movable stroke by increasing the length of the toggle lever, there is a drawback that the boosting force of the toggle mechanism decreases and a large operating force is required.

Therefore, in the past, one end of the toggle lever or connecting rod was made freely engageable and detachable, and the engaging and disengaging portion was engaged during mold assembly, and the engaging and disengaging portion was disengaged when the movable member was to be moved significantly.

-Problems that the invention aims to solve- However, in particularly large formworks, for example, if it is a side plate, it is necessary to provide a large number of fastening devices along the side of the side plate, but it is not possible to engage and disengage these many fastening devices one by one. A problem arises in that mold assembly and mold opening are very time-consuming and complicated.

-Means for solving the problem- This invention is a toggle type fastening device in which a connecting rod is provided with an engaging and disengaging portion at the tip thereof, that is, a fastening device that is pivotally supported by one A of members A and B that are fastened to each other. Toggle lever 3
In a fastening device in which an engagement tool 6 is provided at the tip 5a of a connecting rod 5 attached via The above-mentioned problem is solved by automatically engaging and disengaging the toggle lever 3 with the rotational movement of the toggle lever 3.

In the device of this invention, the above-mentioned engagement tool 6 and receiver 10
In order to automatically engage and disengage the toggle lever 3 from the member A on which the toggle lever 3 is pivoted, move the movable member (member A in the illustrated embodiment) of the receiver 10 along the mold opening movement direction. A guide member 11 extending downward is provided. The upper surface 12 of this guide member has an inclined surface 13 with a downwardly downward slope, and this inclined surface is positioned beyond the receiver 10 when the above-mentioned members A and B are brought into contact with each other. It is provided. The tip 5a of the connecting rod is supported movably along the upper surface 12 of this guide member.

-Operation- When the toggle lever 3 is rotated to the left in the figure from the assembled state shown in FIG. 1, the mutual connection between the members A and B is released and the connecting rod 5 moves to the right in the figure.
The distal end 5a of the connecting rod 5 is supported by the upper surface 12 of the guide member 11, so that by moving it to the right, the distal end 5a of the connecting rod 5 is lowered by its own weight along the inclined surface 13 (FIG. 3). Therefore, the engagement tool 6 provided at the tip 5a of the connecting rod is displaced downward from the receiver 10, and in this state, the movable member A
can be moved without being restricted by interference between the engagement tool 6 and the receiver 10.

When assembling the mold, members A and B are brought into contact with each other from the state shown in FIG. 4 (FIG. 3), and the toggle lever 3 is rotated to the right in the figure. Then, due to the right rotation of the toggle lever 3, the connecting rod 5 moves to the left in the figure, and accordingly, its tip 5a moves upward along the inclined surface 13, so that the engaging tool 6 and the receiving tool 10 face each other. position (second
figure). Then, if the toggle lever 3 is further turned clockwise, the engaging tool 6 engages with the receiving tool 10, and the members A and B are firmly fastened together by the toggle action (FIG. 1).

- Embodiment - The illustrated embodiment shows an example in which the lower side of the side plate A, which is opened by parallel movement, and the base B are fastened together using a plurality of fastening devices 1 that operate simultaneously. is the movable side member, and the base B is the fixed side member.

An operating shaft 2 is pivotally supported on the side plate A along its lower side. The operating shaft 2 is connected to the guide plate 1 described later.
It is pivotally supported through the base of 1a.

Each operating shaft 2 has two lever plates 3.
A toggle lever 3 consisting of a and 3a is fixed, and the base end of a connecting rod 5 is pivotally attached to the tip of the toggle lever 3 with a pin 4. An engaging rod 6 in the shape of a T-bar is fixed to the tip of the connecting rod 5. The engagement rod 6 is fixed by inserting the tip 5a of the connecting rod into a through hole provided in the center thereof and sandwiching it with nuts 7 and 8 from both sides. Flange plates 9 are fixed to both ends of the engaging rod 6, and serve as side guides for a guide member 11, which will be described later.

A receiver 10 consisting of two receiving plates 10a and 10 that engages with and disengages from the engagement rod 6 is fixed to the base B side. The connecting rod 5 has a U member 5b on the base end side to avoid interference with the operating shaft 2, and has two receiving plates 10a, 10a and lever plates 3a, 3a.
It is located between.

At the bottom of the side plate A, sandwich the toggle lever 3,
A guide member 11 consisting of two guide plates 11a, 11a is fixed. The upper surface 12 of this guide member 11 extends toward the base B in the moving direction of the side plate A, that is, in the horizontal direction, and has a downwardly downwardly inclined surface 13 formed at its tip. This inclined surface 13 is provided so as to be located immediately beyond the receiver 10 in the state shown in FIGS. 1 to 3 in which the side plate A and the base B are in contact with each other. Both ends of the engagement rod 6 rest on the upper edges of the two guide plates 11a, 11a, and its lateral movement (in the axial direction of the engagement rod 6) is positioned inside the guide plates 11a, 11a. It is regulated by collar plates 9,9.

In the illustrated embodiment, a plurality of fastening devices 1 having the above structure fasten the lower side of the side plate A and the base B, and the toggle levers 3 of each fastening device are all fixed to the operating shaft 2. By inserting the operating pipe into the lever rod 14 provided at the end of the operating shaft 2 and rotating it, all the fastening devices 1 are fastened and released at the same time.

The operation of this fastening device 1 has been explained in the above-mentioned operation section, so it will not be repeated here, but in the illustrated embodiment, the engagement rods 6... of the plurality of fastening devices 1...
The engagement and disengagement of the receivers 10 and the fastening and releasing operations of the members A and B are performed simultaneously and as a series of operations as the operating shaft 2 is rotated.

- Effects of the invention - According to the above-described fastening device of this invention, the engagement and disengagement of the engagement tool and the receiver of the toggle-type fastening device provided with the engagement and disengagement portion are automatically performed in accordance with the rotational movement of the toggle lever. Therefore, the movement stroke of the movable member is not restricted, and the mold assembly and mold opening operations, especially for a mold provided with a large number of fastening devices, are made very easy. Since the engaging/disengaging operation of the engaging/disengaging part and the mutually fastening and releasing of the members are performed only by rotating the toggle lever, mold assembly and mold opening can be carried out quickly. This also has the effect of simplifying the automation of automatic mold assembly and automatic mold opening of molds on a molding line. Furthermore, the device of this invention is characterized by its extremely simple structure, and has the advantage that a formwork having a structure that automatically engages and disengages the fastening device can be provided at a low cost.

[Brief explanation of the drawing]

The figures show an embodiment of this invention, in which Fig. 1 is a side view showing the fastened state, Fig. 2 is a side view showing the state immediately after the fastening is released, and Fig. 3 is the engaged state after the fastening is released. FIG. 4 is a side view showing a state in which the tool is removed from the opposing position of the receiver; FIG. 4 is a side view showing the mold in an open state;
FIG. 5 is a plan view corresponding to FIG. 1. In the figure, A...movable side member, B...fixed side member,
DESCRIPTION OF SYMBOLS 1... Fastening device, 2... Operation shaft, 3... Toggle lever, 5... Connection rod, 5a... Tip of connection rod, 6... Engagement tool (engaging rod), 10... Receiver,
11... Guide member, 12... Upper surface of the guide member, 13... Inclined surface.

Claims (1)

[Scope of utility model registration request] A toggle lever 3 is pivotally supported on one A of the members A and B that are fastened to each other, and the base end of a connecting rod 5 is pivotally attached to the tip of the toggle lever 3, and an engaging tool 6 is attached to the tip 5a of the connecting rod.
A receiver 10 that engages and disengages with this engagement tool is provided on the other member B, and by engaging the engagement tool 6 and the receiver 10 and rotating the toggle lever 3, both members A and B In the fastening device for fastening each other, a guide member 11 is provided that extends from one member A to below the holder 10 along the mold opening movement direction of the members A and B, and this guide member has an upper surface 12 facing downwardly. This inclined surface is located beyond the receiver 10 when members A and B are brought into contact with each other, and the tip 5a of the connecting rod touches the upper surface 12 of this guide member. A fastening device for concrete formwork, characterized in that it is supported movably along the concrete formwork.