JPS588498Y2 - Terminal sealing device for sleeper formwork - Google Patents

Description

[Detailed description of the invention] The present invention accommodates a tube-shaped packing whose both ends are closed and air, water, etc. are sealed inside the packing groove provided in the flange, and the elasticity of the tube in this packing is
By working together with the elasticity of air and water sealed in the tube,
In addition to sealing the gap between the flange and the end plate, the free movement of water and air within the tube keeps the sealing force of each part of the seal constant, and the end face of the formwork is completely watertight, allowing the paste to flow from this part. This relates to an end sealing device for sleeper formwork that prevents leakage and allows sleepers with product corners of a predetermined shape and strength to be obtained.One example of the device is explained below with reference to a drawing. be.

In the figure, 1 is a sleeper formwork for forming concrete sleepers to be laid under railway rails. Flanges 2 are welded to the outside of both ends, and a packing groove is formed between the flange 2 and the end of the formwork 1. 3 is formed.

Reference numeral 4 denotes a packing which is accommodated in the packing groove 3 with a compression allowance, and is formed into a tube shape from an elastic material such as rubber, both ends of which are sealed, and air, water, etc. are sealed inside.

Reference numeral 5 denotes end plates which are pressed into contact with flanges 2 attached to both ends of the formwork 1 to seal both ends of the formwork 1.

Conventional sleeper formwork seals the ends by pressing the end plates against the flanges provided at both ends, so even if precise pressure is applied so that the flanges and end plates come into close contact, and even if the form is strongly pressed, the rigid body remains. When two-to-one contacts are made, it is difficult to maintain complete watertightness and the paste leaks, resulting in shape defects such as chips in the corners of the product, and strength defects such as brittleness, which require a lot of effort to repair. There were some drawbacks.

However, in the terminal sealing device for a sleeper formwork according to the present invention, a packing groove 3 is provided along the mold surface on a flange 2 provided at the end of the formwork 1 to which the end plate 5 is brought into close contact. It houses a tube-shaped packing 4 which is closed and filled with air, water, etc., so if the end plate 5 is placed in contact with the packing 4 with an appropriate pressure during mold assembly, the packing 4 will become self-contained. Due to both the elasticity and the elasticity of the air, water, etc. sealed inside, it conforms to the end plate 5, completely sealing the gap between the flange 3 and the end plate 5, and allows free movement of air, water, etc. within the tube 4. As a result, the sealing force of each part of the packing 4 is perfectly averaged, and the formwork is completely sealed at both ends so that paste does not leak. Therefore, a sleeper with the corners of the product having a predetermined shape and strength is formed. Since there is no need for any rework after demolding, not only is the low-cost production of high-quality sleepers efficient, but also the accuracy of the joint between the flange and the end plate is improved in the equipment that seals between the flange and the end plate using a seal. It is easy to mold the mold because it does not require much air, and since the tube is filled with air, water, etc.
Not only can the elasticity of water etc. be effectively used as a sealing force to achieve a high level of water-retaining properties, but also the free movement of air, water, etc. within the tube allows the sealing force of each part to be averaged. By feeding pressurized air or pressurized water into the tube as needed, it is possible to increase the sealing force by using air or water pressure, so you can economically obtain complete sealing force and achieve excellent results. This device has an extremely practical effect as an end sealing device for sleeper formwork for manufacturing products.

[Brief explanation of drawings]

The drawings show an embodiment of the terminal sealing device for sleeper formwork according to the present invention, and FIG. 1 is a longitudinal sectional front view of the formwork using this device. Figure 2 is an enlarged side view. FIG. 3 is a partial vertical sectional side view of a state in which sealing is completed by attaching the end plate. In the figure, 1 is a formwork, 2 is a flange, 3 is a packing groove, and 4 is a packing.

Claims (1)

[Scope of utility model registration request] A flange is installed at the end of the sleeper formwork to attach the end plate to.
An end sealing device for a sleeper formwork, characterized in that a packing groove is provided along the mold surface, and a tube-shaped packing whose both ends are closed and air, water, etc. are sealed inside is accommodated in the packing groove.