JPH0780235B2 - Synthetic resin U-shaped groove and method of manufacturing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin U-shaped groove and its manufacturing method.

[0002]

2. Description of the Related Art Conventionally, as a U-shaped groove forming a side groove,
Known are concrete and synthetic resin. These U-shaped grooves are formed to have a predetermined length and are connected to each other for construction. Especially, U made of synthetic resin
The groove was connected using bolts and nuts.

[0003]

Among the U-shaped grooves as described above, the U-shaped groove made of synthetic resin is thin and lightweight and easy to carry, but when installed, earth pressure from the side It may be deformed due to. Further, connecting the U-shaped groove with a bolt and a nut is troublesome and inefficient. Therefore, an object of the present invention is to provide a synthetic resin U-shaped groove which is excellent in strength and easy to connect, and a method for manufacturing the same.

[0004]

In order to solve the above problems, the present invention has the following constitution. As a U-shaped groove, at one end of a gutter-shaped and double-structured synthetic resin main body, a fitting portion having a U-shaped opening from one end is formed, and the other end of the main body is formed. Forms an insertion portion to be inserted into the fitting portion, and the tip of the insertion portion abuts when the insertion portion is inserted into the fitting portion,
A sealing material is arranged in the back of the fitting portion, and an engaging structure is provided that engages concavely and convexly so that the fitting portion and the insertion portion are prevented from slipping out of each other when the insertion portion is inserted into the fitting portion. It is characterized by As a manufacturing method, when the molds are matched, U
Using male and female molds that form a character-shaped space, while the male and female molds are open, a cylindrical synthetic resin material is supplied, and compressed air is supplied to the inside of the cylindrical synthetic resin material. The male mold and the female mold are matched with each other so that the male mold side and the female mold side of the synthetic resin material are partially brought into close contact with each other, and the insertion portion is provided on the tip side of the synthetic resin material. While the compressed air supply side is in an open state, a fitting portion for inserting and connecting the insertion portion is formed.

[0005]

[Operation] The operation will be described. The insertion part is inserted into the fitting part of the U-shaped groove, and the fitting part and the insertion part are engaged with each other in a concavo-convex manner to prevent the fitting part from coming off. Further, since the distal end of the insertion portion comes into contact with the packing arranged in the inner portion of the fitting portion, the connection portion can have a waterproof structure. In the manufacturing method, since compressed air is supplied to the inside of the cylindrical synthetic resin material, the synthetic resin material is in close contact with the inner surfaces of the male and female molds to form the U-shaped groove.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. 1 is a perspective explanatory view showing an outline of a manufacturing apparatus according to the present invention, and FIG. 2 is a longitudinal sectional view of the manufacturing apparatus. As shown in FIG.
It is composed of a male die 12 and a female die 14. When the male mold 12 and the female mold 14 are closed, a space for forming a U-shaped groove is formed. The surface of the male die 12 forming the bottom surface and both side surfaces of the U-shaped groove is formed into a flat surface. A plurality of independent recesses that are orthogonal to the axis are formed on the surface forming the bottom surface and both side surfaces of the U-shaped groove of the female mold 14.

A method of manufacturing a U-shaped groove by using the U-shaped groove manufacturing apparatus 10 will be schematically described. As shown in FIG. 1, the male die 12 and the female die 14 of the manufacturing apparatus 10 are
The cylindrical molten synthetic resin material 18 is dropped into the bottomed space 16 formed in the half-opened state. After the cylindrical synthetic resin material 18 is dropped into the space 16, the male die 12 and the female die 14 are closed (see FIG. 2). Compressed air is blown into the cylindrical synthetic resin material 18 while the mold is closed. Then, as shown in FIG. 2, the synthetic resin material 18 b on the female die 14 side comes into close contact with the irregularities formed on the inner surfaces of the female die 14 on three sides, and the irregularities are formed on the synthetic resin material 18. It Further, the synthetic resin material 18a on the male die 12 side comes into close contact with the flat surface of the male die 12 to form the U-shaped groove 30. The synthetic resin material 18a on the male die 12 side constitutes the inner body 30a of the U-shaped groove 30, and the synthetic resin material 18b on the female die 14 side constitutes the outer body 30b of the U-shaped groove 30. The inner body 30a and the outer body 30b form the body of the U-shaped groove.

The structure of the U-shaped groove will be described below.
FIG. 3 shows the U according to the present invention molded by the above manufacturing apparatus.
FIG. 9 is a side view showing the U-shaped groove, and FIG. 9 is a vertical sectional view of the U-shaped groove. U
The character groove 30 has a double structure including an inner body 30a and an outer body 30b, and is divided into a plurality of spaces. That is, the U-shaped groove 30 is divided into six spaces, and the fitting portion 32 and the insertion portion 34 are formed at both ends. The internal space of each section is defined as the first space to the sixth space as the first, second, third, fourth, fifth, and sixth sections sequentially from the fitting portion 32. The first section 41 has a predetermined space between the side surface and the bottom surface of the inner body 30a and the outer body 30b. The first section 41 is a portion where the side surface and the bottom surface are at regular intervals, that is, the equally-spaced portions 36 (see FIG. 4).
And a lower portion of the outer body 30b forming the side plate is bulged in a direction in which the outer body 30b gradually separates (see FIG. 5). As shown in FIG. 5, in the second section 42, the same bulging portion 37 as the bulging portion 37 of the first section 41 is formed over the entire length. In addition, the first section 41 and the second section 42
A boundary portion 50 serving as a partition exists at the boundary portion between and. As shown in FIG. 6, the boundary 50 is formed by the inner body 3
0a and the bottom surface of the outer body 30b are welded to each other, but a bulging portion 50a that gradually bulges outward is formed on a part of the side surface of the outer body 30b. The bulging portion 50 a bulges smaller than the bulging portion 37. The third section 43 is formed continuously with the second section 42 via the boundary 50. This third section 43 is similar to the first section 41,
The equally-spaced portions 36 and the bulging portions 37 are arranged at opposite positions.

The fourth compartment 44 has the same structure as the first compartment 41, the fifth compartment 45 has the same structure as the second compartment 42, and the sixth compartment 46 has the same structure as the third compartment 43. There is. Further, the fourth section 44 and the fifth section 45, and the fifth section 45 and the sixth section 46 are connected to each other via a boundary portion 50. The third section 43 and the fourth section 44
And are connected via a connecting portion 52. The side surface and bottom surface of the inner body 30a and the outer body 30b of the connecting portion 52 are in close contact with each other, but two communication passages 52a are formed in a part of the bottom surface. The third passage 4 is formed by the communication passage 52a.
The third space and the fourth space of the third and fourth compartments 44 are communicated with each other (see FIG. 7). A partition 48 having the same structure as the boundary 50 is formed between the fitting portion 32 and the first partition 41. In this delimiter 48, U
A groove 31 is formed on the inner peripheral surface of the character groove 30. Further, the fitting portion 32 and the first partition portion 41 are connected to each other by the communication passages 48a, 48a.
(See FIG. 8).

Now, the structures of the fitting portion 32 and the insertion portion 34 will be described. The fitting portion 32 at one end is open toward the end portion, and the insertion portion 34 at the other end can be inserted. On the bottom surface and both side surfaces of the fitting portion 32 formed by the inner body 30a, the retaining projections 32a, 32b protruding inward are provided.
32b is formed. Further, on the bottom surface of the outer body 30b, a retaining projection 33a is formed at a position corresponding to the retaining projection 32a. Among these, the retaining protrusions 32a and 33a on the bottom surface are formed so that the end side becomes shallow. Further, the side surface retaining protrusions 32b, 32b are formed in a triangular shape on the side surface, and the end side is shallow. On the other hand, the insertion portion 34 is formed with retaining recesses 34a, 34b, 34b, 35a that engage with the retaining protrusions 32a, 32b, 32b, 33a of the fitting portion 32 in a concavo-convex manner. Therefore, when the insertion portion 34 is inserted into the fitting portion 32, the retaining protrusions 32a, 32b, 32b, 33a and the retaining recesses 34a, 34b, 34 corresponding to the retaining protrusions 32a, 32b, 32b, 33a, respectively.
b and 35a are engaged with each other and prevented from coming off. The fitting part 3
A seal member 39 is arranged in the inner part of the fitting portion 32 so that the seal portion 39 is sealed when the insertion portion 34 is inserted into the second portion. When the insertion portion 34 is inserted into the fitting portion 32, the insertion portion 3
The retaining protrusions 32a, 32b, 32b, 33a and the retaining recesses 34a, 34b, 34b, 35a are positioned such that the tip of the contacting member 4 abuts the seal member with a strong pressure.

Next, a method of manufacturing a U-shaped groove using the above-described U-shaped groove manufacturing apparatus 10 will be described with reference to FIGS. 1, 2 and 10 together with the detailed structure of the apparatus.
As shown in FIG. 1, a bottomed space 16 formed by half-opening the male die 12 and the female die 14 of the manufacturing apparatus 10.
Then, the molten cylindrical synthetic resin material 18 is lowered. After the cylindrical synthetic resin material 18 is dropped into the space 16, the male die 12 and the female die 14 are closed. Compressed air is blown into the cylindrical synthetic resin material 18 while the mold is closed. Then, as shown in FIG. 2, the synthetic resin material 18 a on the male die 12 side and the synthetic resin material 18 b on the female die 14 side come into close contact with the male and female dies 12, 14. Then, the fitting portion 32,
It is formed in an uneven shape corresponding to the insertion portion 34 and the first to fourth sections 41 to 46. And, as mentioned above,
The synthetic resin material 18a on the male die 12 side constitutes the inner body 30a of the U-shaped groove 30, and the synthetic resin material 18b on the female die 14 side is U.
The outer body 30b of the character groove 30 is configured. On the other hand, the fitting portion 32
Because the compressed air supplied from
Communication passages 48a, 48a from the fitting portion 32 to the separating portion 48,
1st division 41, bulging part 50a of boundary part 50, 2nd division 4
2, the bulging portion 50a of the boundary portion 50, the third partition 43, the communication passages 52a, 52a of the connecting portion 52, the fourth partition 44, the boundary portion 5
An internal space is formed through the bulging portion 50a of 0, the fifth compartment 45, the bulging portion 50a of the boundary portion 50, and the sixth compartment 46 to reach the insertion portion 34.

The female mold 14 can be divided into three parts (see FIG. 10). That is, the female mold 14 includes a bottom female mold 14a on the bottom side, side female molds 14b located on both side faces, and
It can be divided into 4b. The side female molds 14b and 14b are separated from each other laterally when the molds are opened, and the bulging portion 37 and the bulging portion 50a of the U-shaped groove 30 do not prevent the U-shaped groove 30 from being taken out. Then, the mold is opened and the formed U-shaped groove 30 is taken out. A foamed resin material such as urethane resin may be sealed in the internal space from the fitting portion 32 at one end of the U-shaped groove 30.

The upper end of the U-shaped groove 30 is open, and a step portion 30c is formed at the open end (see FIG. 9), so that the lid 60 can be placed (see FIG. 4). The lid 60 is made of a synthetic resin material. Therefore, it is lightweight and has a U-shaped groove 30.
It is also possible to prevent the side wall of the device from falling inward. Although various explanations have been given with reference to the preferred embodiments of the present invention, the present invention is not limited to the above embodiments, and it is needless to say that many modifications can be made without departing from the spirit of the invention. .

[0014]

The U-shaped groove according to the present invention is configured as described above and can be connected by one-touch by inserting the insertion portion into the fitting portion, and the fitting portion and the insertion portion can be engaged and recessed. It is prevented from coming off. Further, in the method of manufacturing the U-shaped groove according to the present invention, since the male and female dies are used to mold and close the cylindrical synthetic resin material while supplying the compressed air to the inner side, it is easy to manufacture. It produces a remarkable effect such as being able to.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view showing an outline of a manufacturing apparatus for manufacturing a U-shaped groove made of synthetic resin according to the present invention.

FIG. 2 is a vertical sectional view of a manufacturing apparatus.

FIG. 3 is a side view showing a U-shaped groove made of synthetic resin.

FIG. 4 is a cross-sectional view taken along the line AA of the U-shaped groove.

FIG. 5 is a BB cross-sectional view of a U-shaped groove.

FIG. 6 is a sectional view taken along line CC of the U-shaped groove.

FIG. 7 is a cross-sectional view taken along the line D-D of the U-shaped groove.

FIG. 8 is a sectional view taken along line EE of the U-shaped groove.

FIG. 9 is a vertical cross-sectional view of a synthetic resin U-shaped groove.

FIG. 10 is a cross-sectional view of the manufacturing apparatus.

[Explanation of symbols]

 10 Manufacturing Equipment 12 Male Mold 14 Female Mold 18 Synthetic Resin Material 30 U-Shaped Groove 32 Fitting Part 32a Detachment Protruding Part 32b Detachment Protrusive Part 33a Detachment Protrusive Part 34 Insertion Part 34a Detachment Recession Depth 34b Detachment Recess 35a Retaining recess

Claims (2)

[Claims] 1. A trough-shaped and double-structured synthetic resin main body is formed with a U-shaped fitting portion open at one end at one end and at the other end of the main body. An insertion part is formed to be inserted into the fitting part, and a sealing material is arranged at the back of the fitting part so that the tip of the insertion part abuts when the insertion part is inserted into the fitting part. A synthetic resin U-shaped groove provided with an engaging structure that engages in a concave-convex shape so that the fitting portion and the insertion portion are prevented from coming out of each other when the insertion portion is inserted into the. 2. A male and female mold that forms a U-shaped space when the molds are matched, and a cylindrical synthetic resin material is supplied in a state where the male and female molds are opened, and the cylindrical synthetic resin is supplied. While supplying compressed air to the inside of the resin material, the male mold and the female mold are matched with each other so that the male mold side and the female mold side of the synthetic resin material are partially brought into close contact with each other. At the same time, the insertion portion is formed on the tip side of the synthetic resin material, while the compressed air supply side is opened, and a fitting portion for inserting and connecting the insertion portion is formed. U-shaped groove manufacturing method.