JP3560603B2 - Forming method of disaster prevention tile - Google Patents

Description

The present invention relates to a method for forming a fire-prevention roof tile in which hook-shaped engaging projections cannot be formed by a conventional roof tile forming method.

In the conventional roof tile forming method, since the upper and lower molds (die) move vertically up and down to press the raw material, molding is performed, so that a space (hook shape, etc.) is formed in the middle of the vertical direction. Is
When the mold for forming the space portion is raised after the pressure molding, the portion forming die comes into contact with the upper formed portion of the space portion in the hook portion and the like and is caught, so that the formation of the hook portion and the like is impossible.

As an example of a structure which cannot be conventionally formed, there is known a locking wind-resistant thick flat tile shown in FIGS. 12 to 15 of the present specification.
That is, the locking wind-resistant thick flat tile according to the prior art is a flat type tile having a roofing structure in which the same portion of the cross-section of the cross-over portion a and the insertion receiving portion b is fitted to a thickness of approximately one tile. An engaging receiving portion f is formed at the end of the insertion receiving portion b on the side of the head c, which is separated by the water guide zone d and the water return e, and has a surface at substantially the same level as the back surface of the tile, and is located near the center of the buttocks g. Is formed with a notch h at the top and a locking projection i having an upper surface that is almost the same as or slightly higher than the surface of the tile. The locking projection i restrains and locks the locking receiving portion f of the oblique upper-stage tile (for example, see Patent Document 1).

In the above-mentioned prior art locking wind-resistant thick flat tile, as described above, due to the method of moving the mold, when forming the buttocks g locking projections i, the buttocks notches h are formed near the center of the buttocks g. Since it had to be formed, the water return j on the side edge of the buttocks g was displaced toward the head c near the center even if it was straight on both sides.
As a result, since the water return j is in a deformed state at the edge of the buttocks g side, the flowing water portion 1 between the water return j on the buttocks g side and the parallel inner water return k is in a deformed state. Further, the water return j near the center approaches the internal water return k or approaches the head c of the upper tile to be superimposed, and the distance between the two becomes shorter. In some cases, it is not possible to reliably receive the backflow rainwater blown from above, or the drainage cannot be performed smoothly, and the waterproof performance is insufficient.

JP-A-8-93141

The present invention provides a fire-prevention roof tile excellent in waterproof performance, in which a hook-shaped engaging projection can be formed in one step.

In view of the problem that the hook-shaped engaging projection cannot be formed without forming the notch based on the above-described conventional technology, the present invention relates to a molding surface of a tile upper surface of a mold used for molding a tile. The protrusion forming portion forming the engaging protrusion is notched, and the press forming portion forming the insertion space is provided so as to be movable in the horizontal direction.
In front of the position where the press-formed portion has advanced into the convex portion forming portion, a recess having substantially the same shape as the press-formed portion is formed.
Forming, making the most advanced position of the press forming part substantially flush with the front side of the concave part, performing up-and-down pressing as a molding step by the mold, and moving the pressing part to the insertion space to the most advanced position. After the raw material in the insertion space is moved to the concave portion and removed, it is returned, and the upper and lower molds are vertically separated by a molding method. In the vicinity of the center of the upper surface of the buttocks side water return surface, an engaging convex portion is provided, which is formed by connecting a rising portion and a horizontal portion from the rising portion to the crosspiece side. An insertion space is formed between the water return surface and the upper surface of the water return surface, which is inserted into the space at the time of staggered roofing. By providing on the outside, a hook-shaped engaging convex part was molded on the upper surface of the straight water return By the Wazawaikawara, in the manner to improve the waterproof performance, to solve the above problems.

In short, the present invention is to form a cross section and an insertion section which are superposed at the time of roofing on both side ends of the tile body.
The rising part and the horizontal part from the rising part to the pier side are continuously connected near the center of the back side of the tile body.
Provided on the horizontal portion of the engagement convex portion and a water return located immediately below the horizontal portion lower surface.
An insertion space is formed between the unit and the top surface.
Since the engagement insertion part where the vertical position of the roof is restricted is provided outside the water return in the insertion part , the bottom of the roof of the tile body provided with the engagement protrusion for preventing the floating and displacement of the disaster prevention tile is Since it is straight, and the water return is not deformed on the side of the roof of the roof tile, it is possible to sufficiently exhibit the blocking and waterproofing of intrusion rainwater .

A notch is formed on the upper surface of the roof of the mold used to form the roof, and a protrusion forming portion that forms an engagement protrusion on the upper surface of the roof is cut out, and a press forming portion that forms an insertion space is horizontally movable. In preparation for
In front of the position where the pressing part has advanced into the convex part forming part, a concave part having substantially the same shape as the pressing part is formed,
The most advanced position of the pressing part is substantially flush with the front side of the recess, and the upper and lower parts are pressed as a molding step by the above-mentioned mold, and the pressing part for the insertion space is moved to the most advanced position to insert the space. After moving the raw material to the recess and returning it, the upper and lower molds are separated vertically, so low density
Regardless of the location of the re-press molding, after the re-press molding, since the upper and lower dies are moved after the press-forming portion for performing the re-press molding returns to the original position, the engagement convex portion is not damaged. In addition, since the engagement convex portion and the roof tile main body are integrated, the strength is not impaired, and the hook-shaped integral molding can be easily performed.
In addition, even if the degree of non-uniformity of the density of the raw material in the convex portion forming portion is large, the density can be made uniform by moving the raw material, or the strength can be improved by increasing the raw material density at a location where the strength is low in shape, Forming of special shapes such as hooks can be performed efficiently and effectively with uniform density and increase in partial density. Molding is possible even in the part.

In addition, since the pressing portion is moved to the most advanced position to move the raw material in the insertion space to the concave portion to form the engaging convex portion, the raw material moved and removed by the progress of the pressing portion is located around the pressing portion. , And also moves to the concave portion in the forward direction of the press forming section, so that the raw material movement is dispersed and the moving efficiency is increased, and the raw material in the insertion space particularly at the final stage of the movement moves to the concave portion. by pressing the molding unit is absent raw material proceeds to non moved to a predetermined position, the engaging convex portion having an insertion space can be formed into the desired hook shape, Thus also the press forming portion outermost Set the advancing position
Because it is almost flush with the front side, even if a small burr occurs around the engaging projection, molding
The burr during drying is isometric its practical effect very that can be naturally separated after.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The fireproof roof tile according to the present invention will be described in detail with reference to FIGS.

In the basic configuration of the flat fire-prevention roof tile 1 having a wind resistance function according to the present invention, as shown in FIG. 1, the roof main body 2 is formed in a planar square shape.
As shown in FIGS. 1, 2, and 3, short ends (front and rear sides in FIG. 1) of the tile main body 2 are formed with a head 3 and a tail 4, respectively. On the surface of the tile body 2, a single water return 6 is provided in front of the buttocks 4 in the lateral direction of the tile body 2.
It should be noted that the clear shape of the hanging 5 is shown in FIG. 3 and is simplified in other drawings.

The shape of the water return 6 provided on the butt 4 is slightly different between the first embodiment shown in FIGS. 1 to 6 and the second embodiment shown in FIG. And they are definitely different.
That is, in the case of the prior art, in order to form the locking projection i, it was inevitable to form the bottom notch h in the water return j, but in the first and second embodiments of the present invention, The formation of the convex portion 16 is integrally formed on the water return 6 (a part of the flat terrace 6b), and the shape of the water return 6 near the formation of the engaging convex portion 16 is exactly the same as the periphery thereof. That is, it is formed in a uniform flat terrace or jetty without cutting or cutting.

A long end (right side in FIG. 1) of the tile body 2 is formed as a lower cutout bar 7, and a strip is provided on the other end (left side in FIG. 1) with a step on the lower side. It extends to form an insertion portion 8.
The insertion portion 8 has a length from the butt 4 to the vicinity of the head 3 and an overlap width with the crosspiece 7 of the tile body 2, and extends along the long end of the surface and the end on the butt 4 side. A hook-shaped water return 9 is provided, and a water return protrusion 10 is provided at the center of the surface in the length direction of the insertion portion 8.
Note that the tip of the insertion portion 8 and the tip of the water return 9 in the insertion portion 8 do not have a definite shape due to the formation of the hanging portion 5, the step is gradually reduced, or Is omitted.

On both side edges of the surface of the tile body 2, the water return 11, 11, 11
a and terraces 12 and 12a are provided respectively.
, 12a etc. may be omitted.
Also, V-shaped concave portions 13 and 13a are provided on both end surfaces of the water return 6 of the buttocks 4 and convex portions 14 and 14a are provided at corresponding positions on the back surface, and nail holes 15 and 15a are provided near the water return 6 and the concave portion 13. Is provided.

In the fire-prevention roof tile 1 having such a basic configuration, as shown in FIGS. 1 to 6, the engagement convex portion 16 and the engagement insertion portion 17 as the components of the wind resistance function are provided near the center of the upper surface of the water return 6 of the butt 4. And at the side end of the insertion portion 8.
That is, as shown in FIGS. 1 and 3, near the center of the water return 6 provided on the tail 4 (other than the location where the concave portion 13 is formed), the water return 6 has a flat terrace shape.
More specifically, a water return 6 is formed by a slope 6a that rises from the center of the tile body 2 toward the tail 4 and a flat terrace 6b having a predetermined width in the flow direction, and the slope 6a is substantially formed. It has a water return of 6.
As shown in FIGS. 2, 5, and 6, a rising portion 18 and a horizontal portion 19 to one side (the side of the crosspiece 7) are continuous near the center of the upper surface of the flat terrace 6b in the water return 6, and a lower portion of the horizontal portion 19 is formed. (The top and horizontal part of the water return 6
A hook-shaped engaging projection 16 having an insertion space 20 into which the engagement insertion portion 17 can be inserted from one side (the side of the crosspiece 7) is provided in a protruding manner (between the lower surfaces of 19).
In addition, since the flat terrace 6b is wider in the flow direction than the water return 6 at both ends,
The engaging projections 16 are also formed wider in the flow direction than the water return 6.

On the other hand, as shown in FIGS. 1, 5, and 6, a portion of the water return 9 provided at the side end of the insertion portion 8 near the tip is bent inward, and the flow direction is formed outside the bent portion 21. A strip-shaped engagement insertion portion 17 of a predetermined length
Is provided.
The shape of the bent portion 21 of the water return 9 has an inward slope, a flow direction, and an outward slope from the butt 4 to the head 3. The water inclined portions are formed as the locking portions 22 and 22a.
In other words, the locking portions 22 and 22a regulate the length of the engagement insertion portion 17 having a predetermined length in the flow direction.

FIG. 7 is a plan view showing the fire-prevention roof tile 1 of the second embodiment. A major difference from the first embodiment of FIGS. 1 to 6 is the structure of the water return 6 provided on the tail 4 side.
That is, the water return 6 of the second embodiment is provided on the butt 4 side in a straight line with substantially the same width, and the shape near the center of the water return 6 is formed as a straight jetty as compared with the prior art. The point that the engaging projection 16 is formed on the jetty is different from that of the first embodiment.

Next, the operation of the disaster prevention roof tile will be described.
As shown in FIG. 4, when a large number of disaster prevention tiles 1 are laid in a zigzag roof, the head 3 of the upper disaster prevention tile 1U partially overlaps the bottom 4 of the lower disaster prevention tile 1D, Adjacent fire-prevention roof tiles 1D1, 1D
In 2, the insertion portion 8 is inserted into the lower notch portion of the crosspiece 7 and overlaps, and both terraces 12 and 12 a are also adjacent.

Then, as shown in FIGS. 5 and 6, the engagement protrusions 16 of the upper and lower disaster prevention roof tiles 1U and 1D which are shifted by half in the horizontal direction.
In the engagement part of the engagement insertion part 17, the upper part of the disaster prevention tile is
When the 1U engagement insertion portion 17 is inserted from the side, the two are in an engaged state, and the vertical positional relationship is regulated.

In the engagement between the engagement projection 16 and the engagement insertion portion 17, the engagement insertion portion 17 has a predetermined length, so that the engagement position in the flow direction can be adjusted.
Furthermore, even if the positional relationship between the engaging projection 16 and the engaging insertion portion 17 in the flow direction can be adjusted, the engaging portions 22 and 22a exist at the upper and lower positions in the flow direction of the engaging insertion portion 17, Since the mating projection 16 is freely abuttable, the adjustment amount is limited, but the engagement state in the flow direction is secured without separating.

Also, at the joint between the horizontally adjacent disaster-prevention roof tiles 1D1 and 1D2, the rainwater that has flowed from the gap between the joints between the water return 11, 11a and the terraces 12 and 12a flows onto the insertion section 8 I do.
Even if the amount of rainwater is large and the flowing speed is high, the water is decelerated by the water return protrusions 10 formed at the center of the insertion portion 8 and is stopped by the water return 9 at the side edge, so that the water flows to the head 3 side.
Then, a part of the running water on the insertion portion 8 is guided by the locking portion 22 above the bent portion 21 continuous to the water return 9 at the place where the engagement insertion portion 17 is formed, and smoothly flows downward. .

A notch 23 is provided on the back surface of the disaster-prevention tile 1 at a position corresponding to the roofing, so that the clogging is improved in correspondence with the formation points of the water return 11, 11a and the terraces 12, 12a.

In the fire-prevention roof tile 1 having the above-described configuration, a wind-proof function against strong winds or the like is exhibited, and the tail end 4 side water return 6 of the roof main body 2 provided with the engagement convex portion 16 for preventing the fire prevention roof tile 1 from floating and shifting is provided. Since it is linear, the water return 6 is not deformed on the side of the tail 4 of the tile main body 2, so that it is possible to manufacture a fire-prevention tile that can sufficiently exhibit the blocking and waterproof performance of infiltration rainwater.

Next, a method of forming the hook-shaped engaging projection 16 having a special effect will be described.
FIG. 8 is a cross-sectional view of a mold for press-molding the disaster prevention roof tile 1, and FIG. 9 is an enlarged cross-sectional view of the mold showing a main part of a place where the engaging projection 16 is formed. (B) shows the insertion space
FIG. 10 is a side view showing a state in which a hook-shaped engaging convex portion 16 is formed by removing 20 raw materials, and FIG. FIGS. 3A and 3B are schematic views showing a molding state of (a), a raw material to be charged into a cavity 31 of a mold 30, (b) a press-formed body by upper and lower dies 32, 33, and (c) a press-formed body. An intermediate state in which the insertion space 20 is formed in the engagement projection 16 while the portion 37 is in the process of being advanced, and (d) shows the formation of the hook-shaped engagement projection 16 having the insertion space 20 on the side. Indicates a completed state.

The mold 30 is composed of upper and lower molds 32 and 33 (including side frames) forming a cavity 31 which is a raw material charging space. The entire structure including the surface of the roof tile 1 and the insertion space 20 of the engagement protrusion 16 is formed, and the insertion space 20 is formed at the location where the engagement protrusion 16 is formed.
A part forming mold 34 for molding the slab is arranged.
That is, a substantially trapezoidal projection forming section 35 that forms the engaging projection 16 including the insertion space 20 at a predetermined location of the upper mold 32 is cut out, and the lower mold 33 is formed outside the projection forming section 35. An extended external forming portion 36 (part of the side frame) is provided.
Further, a press forming part 37 having a shape corresponding to the insertion space 20 is freely movable in the direction of the convex part forming part 35 by the cylinder 37a in the partial forming die 34 arranged outside the external forming part 36 of the convex part forming part 35. Has been placed.
Further, a concave portion 38 is formed in a part of the surface of the upper mold 32 where the convex portion forming portion 35 is formed, and the concave portion 38 is recessed at a position corresponding to the insertion space 20 facing the convex portion forming portion 35. The side is open so as to face the cavity 31.
That is, the concave portion 38 is formed in front of the position where the press forming portion 37 of the partial forming die 34 has advanced into the convex portion forming portion 35.
Therefore, the molding surface of the mold 30 includes the upper and lower molding surfaces of the upper and lower dies 32 and 33, the inner surface of the side frame, and the convex portion forming portion.
The inner surface of the recess 35 and the inner surface of the outer forming portion 36 correspond to each other, and the tip of the press forming portion 37 in the partial forming die 34 also constitutes a part of the forming surface of the mold 30.

Next, a molding method using the mold 30 having such a configuration will be described.
First, as shown in FIGS. 11 (b) and 9 (a), the raw material charged into the cavity 31 is transferred to the upper and lower dies 32,
By the upward and downward pressing of 33, the engaging convex portion 16 including the tile body 2 and the insertion space 20 is integrally formed from the raw material of the cavity 31 and the convex portion forming portion 35 (including the concave portion 38).
Next, as shown in FIGS. 11 (c), (d), and FIG. 9 (b), while the press-molding state by the upper and lower dies 32, 33 is maintained, a part of the molding surface is formed by the operation of the cylinder 37a. The press forming part 37 of the partial forming die 34 is advanced to the convex part forming part 35, and the raw material at the position of the insertion space 20 in the convex part forming part 35 is pressed out to eliminate the rising part 18 where the insertion space 20 exists. And a hook-shaped engaging convex portion 16 composed of
When the hook-shaped engaging projection 16 is formed, the raw material existing at the position corresponding to the insertion space 20 is transferred to the rising portion 18, the horizontal portion 19, the cavity 31 and the concave portion 38 side in the mold 30 of the molded product. Moving.
Then, after partially molding the engaging convex portion 16 having the insertion space 20, the pressing molded portion 37 is retracted, and the upper and lower dies 32, 33 are vertically separated to complete the molding, whereby the engaging convex portion is formed. 16 is formed linearly without damaging it and without adversely affecting the water return 6 as compared with the prior art.
As shown in FIG. 9 (b), if the most advanced position of the press forming portion 37 of the partial forming die 34 is substantially flush with the front side of the concave portion 38, the periphery of the engaging convex portion 16 is slightly Even when burrs are generated, the burrs are naturally separated during drying after molding.

It is a top view of the disaster prevention tile concerning the present invention. It is a front view of FIG. FIG. 2 is a side view of FIG. 1. It is a top view which shows the staggered roofing of a disaster prevention tile. It is an enlarged plan view which shows the wind resistant engagement part at the time of the staggered roof. It is principal part sectional drawing of FIG. It is a top view of the disaster prevention tile of a 2nd example. It is sectional drawing of an engagement convex part formation die. It is an expanded sectional view of the important part of a metal mold of an engagement convex part formation place. It is a principal part enlarged side view of the engagement convex part formation location in an upper type | mold. It is a schematic diagram which shows the molding state of an engagement convex part. It is a perspective view of the locking wind-resistant thick flat tile of the prior art. 13 is a plan view of the tiles of FIG. FIG. 14 is a perspective view of a main part of the roofing of FIG. 13. FIG. 14 is a cross-sectional view of the main part AA of the roofing in FIG. 13.

Explanation of reference numerals

2 roof tile body 4 butt 6 water return 7 pier 8 insertion part 9 water return
16 Engagement protrusion
17 Engagement insertion part
18 Rise
19 Horizontal section
20 Plug-in space
30 mold
32 Upper type
33 Lower mold
35 Convex part
37 Press forming part
38 recess

Claims (1)

At the both ends of the tile body, a crosspiece that is superimposed at the time of roofing and an insertion part are formed, and a rising part and a horizontal part from the rising part to the crosspiece side are continuous near the center of the back side of the tile body A projection space is formed between the lower surface of the horizontal portion of the engagement projection and the upper surface of the water return located directly below the lower surface of the horizontal portion. A method of forming a tile in which an engagement insertion portion whose vertical position is regulated by being inserted is provided outside a water return in the insertion portion,
A notch is formed on the upper surface of the roof of a mold used for forming the roof, and a pressing portion for forming an insertion space is horizontally moved. Prepare freely,
A recess having substantially the same shape as the press-formed portion is formed in front of the position where the press-formed portion has advanced into the convex portion forming portion.
Then, the most advanced position of the press forming portion is substantially flush with the front side of the concave portion, and the upper and lower press forming is performed as a forming process by the mold, and the press forming portion with respect to the insertion space is moved to the most advanced position to make a difference. A method for forming a disaster prevention roof tile, characterized in that the raw material in the filling space is returned to the concave after being moved to the recess, and the upper and lower molds are vertically separated.

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