JPH0430333B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an apparatus for forming curved gutter suitable for construction on the roofs of shrines, temples, etc., for example.

Prior Art Curved gutters whose shafts are curved in the longitudinal direction are used for the roofs of shrines, temples, etc.;
As described in Publication No. 34290, a groove is formed from one longitudinal end to the other end, and a convex curved surface is formed from one longitudinal end to the other end of the bottom of the groove. A mold with a curved gutter and a mold with a protrusion along the convex curved surface have been proposed, but in order to form a curved gutter using such a device, a synthetic resin gutter-like body is inserted between the two molds When a heat-softened synthetic resin gutter-like body is bent by introducing the heat-softened synthetic resin gutter-like body into a mold and molding it, the edges of the heat-softened synthetic resin gutter-like body meander and form a part between the molds. It has the disadvantage that it is difficult to fit between the two, which may result in defective molding.

OBJECT OF THE INVENTION The present invention solves the drawbacks of the conventional device as mentioned above,
The purpose of this invention is to provide an apparatus that can form a curved gutter without causing forming defects.

Summary of the Invention The gist of the present invention consists of a convex type and a concave type. The convex shaft is bent in the protruding direction or the width direction of the protrusion from one end to the other end, and a plurality of pairs of ear edge locking parts are provided on the base on both sides of the protrusion. The concave mold is used in a curved gutter forming device, in which a concave groove portion is provided on the protrusion portion with a narrow gap and crowned with a concave groove portion, and edge support portions are provided on both sides of the concave groove portion. Exists.

Composition of the invention Hereinafter, the present invention will be explained with reference to embodiments of the drawings.

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a sectional view taken along the - line in FIG. 1.

1 is a convex type, and 2 is a concave type. Synthetic resin such as hard vinyl chloride resin has ears 32, 32 on both side edges of a main body 31 having a substantially semicircular cross-sectional outline as shown in FIG. This is a member for bending the gutter 3 by sandwiching it between the two after being heated and softened.

The convex mold 1 has a protrusion 1 having a substantially semi-circular cross-sectional outer shape along the longitudinal direction at substantially the center of a long plate-shaped base body 11.
2 is provided, and the axis of the base body 11 and the protrusion 12 is bent convexly from one end to the other end in the direction in which the protrusion 12 protrudes (see Fig. 3), and the axis is further curved in the width direction. (See Figure 4). The protruding portion 12 serves as a mounting portion for the main body 31 of the synthetic resin gutter 3 to be bent. On the base body 11 on both sides of the protrusion 12, a plurality of pairs of ear edge locking portions 13, 13, . . The ear edge locking part 13 has a shaft part 132 provided below one side wall of a locking piece 131 having a substantially L-shaped cross section, an elastic member 133 made of a spring is fitted to the shaft part 132, and the shaft part 132 has a protrusion. It is inserted into through holes provided in the base body 11 on both sides of the part 12, and caulked so that the lower end does not come out, and the locking piece 131 and the base body 1
The elastic material 133 inserted between the protrusions 12 and 1 can be compressed and expanded in the direction in which the protrusions 12 protrude, and the locking pieces 131 hold the edges 32, 32 of the synthetic resin gutter 3 to be bent. It is said that it can be pressed. The other side wall of the locking piece 131 of the provided ear edge locking portion 13 is erected in the direction in which the protrusion 12 protrudes, and the edge 3 of the synthetic resin gutter 3 to be normally bent.
The ear edge 3 is used to lock the outside of the locking piece 131.
It is preferable to leave an interval of about three times the outer diameter of 2 and 32.

The convex mold 1 has a hollow interior, and a hole of 40 to 60 mm is inserted into the hollow interior through a through hole provided in the base 11.
℃ hot water can be circulated, and its surface temperature is approximately
It can be heated to 30-50℃.

The concave mold 2 has a slit on the protrusion 12 of the convex mold 1 corresponding to the wall thickness of the main body of the curved gutter to be formed by bending the main body 31 of the synthetic resin gutter 3 to be formed. An ear edge locking piece 131 is provided along the longitudinal direction on the base body 11, which is provided with a concave groove portion 21 having a curved surface along which the groove portion 21 is opened, and on both sides of the concave groove portion 21, ear edge locking portions 13, 13, . . . are provided. Ear edge support portions 22, 22 are provided which are interposed and crowned and support the edge edges 32, 32 of the synthetic resin gutter 3 to be bent. Concave 2
The inside is hollow, for example 40 to 60
℃ warm water can be circulated, and its surface temperature is 30℃.
It is said that it can be heated to ~50℃. The concave mold 2 is opposed to the convex mold 1 with the concave groove 21 facing the protrusion 12, and can be freely pressed in the direction of the convex mold 1 by a hydraulic cylinder 23, and is heated and softened to form a synthetic resin gutter. 3 is sandwiched between the convex mold 1 and bending processing is possible.

Next, one mode of use of the embodiment of the present invention described above will be explained with reference to FIGS. 5 to 7.

Hot water of 40 to 60°C is circulated in the hollow parts of the convex mold 1 and the concave mold 2 to maintain a surface temperature of approximately 30 to 50 °C, and a synthetic resin gutter is heated and softened by a known heating means on the convex mold 1. 3 upside down and crowned, the main body part 31 is straddled over the protrusion part 12, and the ear edge 32,
32 is locked between a plurality of pairs of ear edge locking parts 13, 13... (see FIG. 5). After that, when the hydraulic cylinder 23 is activated and the concave mold 2 is pushed down toward the convex mold 1, the edge support parts 22, 22 of the concave mold 2 first
are brought into contact with the ear edges 32, 32 (see FIG. 6).
Next, the ear edges 32, 32 are connected to the ear edge locking parts 13, 13...
By being pressed by the elastic members 133, 133..., the main body portion 31 gradually moves between the protrusion 12 and the concave groove portion 21.
(See Figure 7). Finally convex type 1
The main body part 31 is pressed and molded between the protrusion part 31 and the concave groove part 21, and after leaving it for a certain period of time, the convex mold 1
The concave mold 2 is released from above and the curved synthetic resin gutter is taken out from the convex mold 1, and the molding of the curved gutter is completed.

In addition, in the convex mold 1, the base 11 and the protrusion 12 may be integrated, or the base 11 and the protrusion 12 may be integrated.
The shaft may be curved in the protruding direction of the protrusion 12 from one end to the other end, or the shaft may be curved in the axial direction.

In addition, the ear edge locking portion is a locking piece 1 having a substantially L-shaped cross section.
31, synthetic resin gutter 3
It is preferable that the ear edges 32, 32 of the ear edges 32, 32 can be locked to the outer side and lower side in the width direction so that they do not come off, and the locking operation can be easily performed from the upper inner side, but the shape of the locking piece is is not limited to this, and may have a substantially C-shaped cross section, for example.

In addition, if the locking piece 131 is made compressible and expandable in the direction of protrusion of the protrusion 12 by the elastic material 133, the heat-softened synthetic resin gutter 3 is turned upside down and the main body part 31 is protruded. Stretch over the striations 12,
The ear edges 32, 32 are connected to a plurality of pairs of ear edge locking parts 13, 13.
... When the concave mold 2 is pushed down toward the convex mold 1 by locking between
This is preferable because the main body portion 31 is gradually pushed between the protrusion portion 12 and the groove portion 21 by being pressed by the elastic members 133, 133, .

In addition, the convex mold 1 and the concave mold 2 are hollow, and instead of having a mechanism for circulating hot water in the hollow parts, other heating means such as embedding a heater may be provided, but both are essential. isn't it. However, if at least the convex mold 1 can be heated, for example, if hot water of 40 to 60 degrees Celsius is circulated inside the hollow part and the surface temperature is raised to approximately 30 to 50 degrees Celsius, bending processing can be performed. It is preferable that the synthetic resin gutter 3 to be molded can be bent without leaving any partial distortion that would occur if the synthetic resin gutter 3 suddenly comes into contact with the low-temperature convex mold 1 and causes whitening.

Effects of the Invention The curved gutter forming apparatus of the present invention is configured as described above, so that the synthetic resin gutter that has been softened by heating is sandwiched between a convex mold and a concave mold to perform the bending process. In this case, the rim of the ear is locked in the rim locking part, and the concave mold is pressed onto the convex mold while the rim of the ear is regulated so as to roughly follow the shape to be curved, and the main body is made into a convex shape. By pushing it between the protrusion of the mold and the concave groove of the concave mold, it is possible to bend into a complicated shape without causing molding defects.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a sectional view taken along the - line in FIG. 1, FIGS. 3 and 4 are a side view and a plan view of the convex shape in the embodiment shown in FIG. 1, respectively, and FIGS. FIG. 2 is a perspective view illustrating one usage mode of an embodiment. Explanation of symbols, 1...convex, 2...concave, 3...
Synthetic resin gutter, 11...base, 12...projection,
13...Ear edge locking part, 21...Concave groove part, 22...
Ear rim support part, 31... Main body part, 32... Ear rim, 1
31... Locking piece, 133... Elastic material.

Claims (1)

[Claims] 1. Consisting of a convex type and a concave type, the convex type is provided with a protrusion along the longitudinal direction at approximately the center in the width direction on the elongated base, and one end of the convex type is provided with a protrusion along the longitudinal direction. The convex shaft is bent in the protruding direction or the width direction of the protrusion from the protrusion to the other end, and a plurality of pairs of ear edge locking parts are provided on the base on both sides of the protrusion. and the concave mold is provided with a concave groove portion that covers the protrusion portion with a narrow gap, and edge support portions are provided on both sides of the concave groove portion. 2. The curved gutter forming device according to claim 1, wherein the ear edge locking portion is provided with a locking piece having a substantially L-shaped cross section. 3. The curved gutter forming device according to claim 2, wherein the locking piece is made compressible and expandable in the projecting direction of the protruding portion by an elastic material. 4. The curved gutter forming device according to claim 1, 2, or 3, wherein the convex mold is heatable.