JP2911715B2 - How to attach joint seal material to concrete products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a long core made of a compressible material and an adhesive bonding layer extruded so as to cover the longitudinal surface of the core. The present invention relates to a method of attaching a joint seal material of a concrete product to an end face of a joint portion of a concrete product (for example, a concrete box culvert constituting a water channel) on one side surface of a joint layer.

[0002]

2. Description of the Related Art In this type of joint seal material,
As shown in FIG. 5, a long core 112 made of a compressible material such as sponge rubber is fed into the extrusion path of the die 122 of the extrusion molding machine 121, and the core 112
An adhesive material such as butyl rubber is heated and melted and pumped so as to cover the surface in the longitudinal direction. And die 12
By extruding the core body 112 and the bonding layer 113 made of the adhesive material from the extrusion opening at the exit of the molding path 2, the joint seal material 111 is extruded. When the joint sealing material 111 is extruded, a release paper 115 is attached to one side surface of the bonding layer 113 in the longitudinal direction. The joint seal material 111 manufactured as described above is wound in a spiral shape, packed in a box, and shipped to a concrete product manufacturing factory. On the other hand, in a concrete product manufacturing plant, an adhesive is applied to the end of the connecting portion of the concrete product such as the concrete box culvert manufactured here at the sealing material attaching portion. Then, after the release paper 115 is peeled off from one side surface of the joint seal material 111 taken out of the packing box, one side surface of the joint seal material 111 is applied to a place where the adhesive is applied on the end face of the connecting portion of the concrete product. Is affixed.

[0003]

By the way, in the above-mentioned conventional method, the joint sealing material 111 is extruded, a release paper 115 is attached to one side surface of the bonding layer 113, and after the bonding layer 113 is cooled, It must be spirally wound and packed in a box. Further, in a concrete product manufacturing plant, when the joint sealing material 111 taken out of the packing box is adhered to the end face of the joint part of the concrete product, the bonding layer 113 of the joint sealing material 111 has a reduced adhesiveness, so that the concrete After applying the adhesive to the sealing material sticking portion on the end face of the connecting portion of the product, the joint sealing material 111 must be stuck, and the joint sealing material 111 must be held until the adhesive dries and solidifies. For this reason, much labor is required to attach the joint seal material 111 to the connecting end face of the concrete product, and the cost is increased.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to attach a joint sealing material to a concrete product so that the joint sealing material can be easily and securely attached to an end face of a connecting portion of the concrete product. Is to provide a way.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a long core made of a compressible material, and an extruded body covering a longitudinal surface of the core. A joint sealing material for a concrete product, wherein a joint sealing material having a bonding layer having adhesiveness is adhered to an end face of a connecting portion of the concrete product on one side surface of the joining layer. While extruding the joint sealing material having the core and the bonding layer from the extrusion port, while the bonding layer retains heat that does not reduce the adhesive strength of the bonding layer, the connection of the concrete product is performed. The joint sealing material is pressed against the end face of the joint by pressing means, and one side surface of the joint layer is adhered by the adhesive force of the joint layer.

[0006]

In the method for adhering a joint seal material for a concrete product having the above-described structure, the joint seal material having a core body compressible from an extrusion port of an extruder and an adhesive bonding layer is used for a concrete product. While being pushed by the pressure contact means while being pushed to the end face of the joint, the joint seal is joined to the end face of the joint part of the concrete product while holding heat so that the adhesive strength of the joint layer of the joint seal material does not decrease. The material is adhered by the adhesive force of the bonding layer.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. 1 and 2, a concave groove 2 to which a joint sealing material 11 is adhered is provided around an end face of a connecting portion of a concrete box culvert 1 as a concrete product manufactured in a concrete product manufacturing plant.
Are formed in an annular shape.

The joint seal material 11 adhered to the bottom of the concave groove 2 of the box culvert 1 is made of a compressible material such as foamed resin or rubber, for example, a compressible material such as sponge rubber, and has a hollow cross section. An elongated core 12 having a substantially trapezoidal shape, and a bonding layer 13 made of an adhesive material extruded so as to cover the surface of the core 12 in the longitudinal direction, for example, butyl rubber, urethane rubber, silicone, etc. And The cross-sectional shape of the core body 12 is not limited to a hollow, substantially trapezoidal cross-section, and may be a circular cross-section, a square, or the like, or may be a solid.

The joint sealing material 11 having the core 12 and the bonding layer 13 is adhered along the concave groove 2 of the box culvert 1 while being extruded from the extrusion opening of the die 22 of the extruder 21. . That is, in this embodiment, the extrusion 21 is configured to be small so that it can be moved manually or by a moving device along the groove 2 of the box culvert 1. In the forming path of the die 22 of the extruder 21, the long core 12 is fed, and the adhesive material constituting the bonding layer 13 is formed so as to cover the longitudinal surface of the core 12. Heated and melted and pumped. For example, when the adhesive material is butyl rubber, it is heated and melted at 100 ° C. to 150 ° C. and pumped.

The extruder 21 is moved along the groove 2 of the box culvert 1 while extruding the joint seal material 11 having the core 12 and the bonding layer 13 from the extrusion port at the exit of the forming path of the die 22. You. Then, while the adhesive strength of the bonding layer 13 of the joint seal material 11 does not decrease, for example, when the bonding layer 13 is butyl rubber, while the bonding layer 13 retains heat of about 90 ° C. Bonding layer of joint sealing material 11 on the bottom of concave groove 2 of box culvert 1
One side surface 13 is pressed by the pressing roller 23. At this time, the release paper 14 rolled is used as the joint seal material.
11 and the pressure roller 23
Release paper 14 is attached to the surface of the bonding layer 13 of the eleventh embodiment.

The extruder 21 is a box culvert 1
Is moved along the concave groove 2 of the
The rotation of 23 causes one side surface of the joint layer 13 of the joint seal material 11 extruded from the extrusion opening of the die 22 to be pressed by the adhesive force of the joint layer 13 into the groove 2 of the box culvert 1.
A release paper 14 is attached to the surface of the joint seal material 11 while being annularly attached over the entire bottom surface of the joint.
When the joint sealing material 11 is extruded from the extrusion opening of the die 22 by the entire length of the bottom surface of the concave groove 2 of the box culvert 1, as shown in FIG.
11 is cut diagonally. And joint seal material 11
The ends 11a and 11b of the longitudinal direction are joined to each other, so that in the portion of the joining layer 13 between the ends 11a and 11b,
It is integrally joined by the adhesive force of the joining layer 13, and a joint sealing material is provided on the bottom surface of the concave groove 2 of the box culvert 1.
11 is attached in an annular shape, whereby the attachment of the joint seal material 11 to the concave groove 2 of the box culvert 1 is completed.

As described above, when the joint sealing material 11 is adhered to the bottom surface of the concave groove 2 of the box culvert 1 while being extruded and formed, the bottom surface of the concave groove 2 is cleaned by an air gun in advance, so that the joint sealing material 11 is cleaned. 11 sticking defects are prevented. Further, if necessary, an adhesive is applied to the bottom surface of the concave groove 2 of the box culvert 1 so that the adhesive force of the joint seal material 11 can be further increased.

When a required number of box culverts are installed in series at the construction site of a canal, as shown in FIG.
Of the opposing end faces of the two adjacent box culverts 1 and 1 ′, the joint sealing material stuck as described above in the concave groove 2 of the end face of one of the box culverts 1 and the connecting portion.
The release paper 11 is peeled off. Then, the two box culverts 1 and 1 'are adjacent to each other in a state where the joint sealing material 11 attached to the concave groove 2 on one end face of the connecting portion is compressed at a compression ratio of about 50%. , 1 'are connected in series.

[0014]

As described above, according to the present invention,
The joint seal material is easily and reliably adhered to the end face of the concrete product by an extremely simple operation of pressing the joint seal material by pressing means while extruding the joint seal material from the extrusion port of the extrusion molding machine to the end surface of the joint product. can do.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a method for attaching a joint seal material according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a joint seal material is attached to a concave groove of the box culvert.

FIG. 3 is a front view of the same.

FIG. 4 is a cross-sectional view showing a state where adjacent box culverts are connected.

FIG. 5 is an explanatory view showing a state in which a joint seal material is extruded from a conventional extruder.

[Explanation of symbols]

 1 Box culvert (concrete product) 11 Joint seal material 12 Core 13 Bonding layer 21 Extruder 22 Die 23 Press roller (Press means)

Claims (1)

(57) [Claims] 1. A long core made of a compressible material,
Concrete in which a joint sealing material having an adhesive bonding layer extruded so as to cover the longitudinal surface of the core body is attached to an end face of a connecting portion of a concrete product on one side surface of the bonding layer. A method for attaching a joint seal material to a product, wherein the joint seal material having the core and the bonding layer is extruded from an extrusion port of an extruder, and heat is applied so that the adhesive force of the bonding layer does not decrease. While the joint layer is held, the joint sealing material is pressed against the end face of the connecting part of the concrete product by press-contact means, and one side surface of the joint layer is adhered by the adhesive force of the joint layer. Characteristic method of sticking joint seal material to concrete products.