JPH069840B2 - Gutter joint and injection mold for gutter joint - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a gutter joint formed of synthetic resin or the like and an injection molding die for the gutter joint.

(Prior Art) As a conventional gutter joint, for example, one shown in FIG. 13 is known.

This gutter joint E is a joint body 0 made of synthetic resin.
1. The water blocking material step portions 02, 03 are provided on the outer peripheral surface of one end portion and the inner peripheral surface of the other end portion of 1, and the water blocking material step portions 02, 03 are provided.
The water blocking members 04 and 05 made of a soft material are integrally formed with the joint body 01.

Further, as an injection molding die for injection molding the trough joint E, one shown in FIG. 14 is known.

The injection mold F includes a male mold 06 and a female mold 07 arranged with the male mold 06 via a joint main body gap t01. The male mold 06 is provided on the main body 08 and on both sides of the main body 08. It is composed of two movable molds 09, 010 for closing and opening the gaps t02, t03 for the water blocking material. The movable dies 09, 010 are used to form the gap t for the water blocking material at the time of molding the water blocking material.
It was provided slidably in the horizontal direction with respect to the main body 08 so as to open 02 and t03.

Further, the female mold 07 has injection devices 011 and 01 for filling the gaps t02 and t03 for the waterproof material with a soft material such as rubber.
Two were provided.

Therefore, the synthetic resin material is filled in the joint body gap t01 between the male die 06 and the female die 07 at the time of molding the joint body, and the body body 08 and the female die 07 are separated by the gap t for the joint body at the time of molding the waterproof material.
While keeping 01, the gap t for the water stop material opened by sliding the movable molds 09 and 010 in the horizontal direction.
Each of 02 and t03 is filled with a soft material such as rubber by the injection devices 011 and 012, and as shown in FIG. 13, a water spout joint 04 and 05 are integrally formed at both ends of the joint body 01. Can be molded.

An example of such a conventional gutter joint and an injection molding die for a gutter joint is the West German Patent Application Publication No. 2936016.
No. 5 is described.

(Problem to be Solved by the Invention) However, in the above-mentioned conventional trough joint E, since the water blocking members 04 and 05 are integrally formed at both ends of the joint body 01 in a state of being separated from each other, Joint parts 013, 0 joined to the outer peripheral surface of the water material 04 and the inner peripheral surface of the water blocking material 05
When 14 expands and contracts due to changes in temperature, the water blocking materials 04 and 05 may be separated from the water blocking material stepped portions 02 and 03.

Further, in the conventional injection molding die F, the male die 06 is composed of a main body 08 and two movable dies 09 and 010 which are provided on both sides of the main body 08 and close and open the gap t01 for the water blocking material. Therefore, there is a problem that a gutter joint integrally formed with the joint body 01 is molded in a state where the water blocking members 04 and 05 are separated from each other.

Further, there is a problem that the structure of the injection molding die becomes complicated and the cost becomes high because the number of injection devices is required to be equal to the number of the gaps for the water blocking material.

Further, since the injection device is provided in a certain direction of the injection mold, depending on the shape of the gutter joint, a large number of injection ports may be formed on the surface to form an unaesthetic appearance.

(Means for Solving the Problem) The present invention is intended to eliminate the above-mentioned drawbacks, and the gist of the first invention is to provide the joint body near both ends thereof.
In a gutter joint in which a waterproof material made of a soft material is integrally molded in a direction substantially orthogonal to the connection direction, the waterproof material is connected by a connecting material made of the same material, and the connecting material abutment surface of the joint body is raised. It exists in a gutter joint in which a surface portion and a bottom portion are alternately formed.

Further, the gist of the second invention is that a male type body is provided with a plurality of slide blocks for closing and opening the gap for the water blocking material, and the male type body is arranged via the gap for the joint body. In the injection molding die for the gutter joint equipped with
For a gutter joint in which the male mold is provided with a slide core that closes and opens the gap for the connecting material that is communicated with the gap for the water blocking material, and the mold face of the slide core is alternately formed with the high surface portion and the bottom surface portion. It exists in the injection mold.

(Operation) As described above, in the trough joint of the first invention, the water blocking material is connected by the connecting material made of the same material, and the high surface portion and the bottom surface portion are alternately formed on the connecting material contact surface of the joint body. Therefore, even if the joint parts joined to both ends of the gutter joint expand and contract due to temperature changes, not only can the waterproof material be prevented from coming off the joint body, but It is possible to prevent misalignment and to prevent the connecting material from flipping over.

In addition, by using the injection molding die of the second invention, first, by filling a synthetic resin material into the joint body gap between the male die and the female die, the connecting member contacting surface is provided with the high surface portion and the bottom surface portion. Soft joints such as rubber are formed in the gaps for the waterproof material and the gaps for the connecting material of the waterproof materials that are opened by sliding the slide blocks and slide cores by forming the joint bodies that are alternately formed. By filling the material, the gutter joint integrally formed with the joint body in the state where the plurality of water blocking members are connected by the connecting member can be molded by one injection molding die.

(Examples) Hereinafter, examples of the present invention will be described in detail with reference to the drawings.

First, the first embodiment shown in FIGS. 1 to 9 will be described.

First, the gutter joint A shown in FIGS. 1 and 2 will be described.

Reference numeral 1 is a joint body for connecting the gutters 8 and 9, and watertight material step portions 2 and 3 are formed on the outer peripheral surface of one end and the inner peripheral surface of the other end in a direction orthogonal to the connecting direction. A groove 11 for connecting material is formed on the bottom surface so as to communicate with the step portions 2, 3 for water blocking material in the connecting direction. Groove for connecting material 11
Is provided with a high surface portion 11a and a bottom surface portion 11b, the high surface portion 11a is formed in a lattice shape, and an injection port 23 for injection molding is formed in the central portion. The joint body 1 is made of hard synthetic resin.

Numerals 4 and 5 are water blocking materials, which are integrally formed with the water blocking material steps 2 and 3 of the joint body 1, respectively, and are made of a soft material such as rubber. 3 on the upper surface of each of the waterproofing materials 4 and 5.
Book ridges 6, 6, 6 are provided.

Reference numeral 7 denotes a connecting member, which is integrally formed in the connecting member groove portion 11 and connects the water blocking members 4 and 5, and is made of the same soft material as the water blocking members 4 and 5. Similar to the connecting member groove portion 11 of the joint body 1, the connecting member 7 has a high surface portion 7a and a bottom surface portion 7b formed on the upper surface, and is integrally formed with the connecting member groove portion 11 with a constant thickness. There is.

Next, the operation of the gutter joint A will be described.

In the gutter joint A of the above-mentioned embodiment of the present invention, the water blocking material 4,
5 are connected by a connecting member 7 made of the same material, and the connecting member groove portion 11 of the joint body 1 is provided with the high surface portion 11a and the bottom surface portion 11b, and the high surface portion 11a is formed in a lattice shape.
The contact area between the connecting member 7 and the joint body 1 is increased, the frictional resistance is increased, and the fixing property of the connecting member 7 is improved.

Therefore, when the gutter joint A is used, even if the gutters 8 and 9 joined to the outer circumferential surface of the water blocking material 4 and the inner circumferential surface of the water blocking material 5 contract due to a decrease in temperature or the like, the water blocking material 4, It is possible to prevent the position 5 from being displaced with respect to the water blocking material step portions 12 and 13.

Further, even if the gutters 8 and 9 expand due to a rise in temperature, the connecting member 7 can be prevented from being turned over from the connecting member groove 11.

In addition, when the connecting member groove portion 11 of the joint body 1 is formed on a surface having the same height without a height difference, the friction resistance between the connecting member 7 and the connecting member groove portion 11 becomes small. , 9 is contracted, the connecting member 7 is pulled from both sides by the water blocking members 4 and 5, and expands, or is displaced with respect to the connecting member groove portion 11, and the water blocking members 4 and 5 are displaced. There is a risk of

Next, the configuration of the injection molding die for the gutter joint will be described with reference to FIGS. 3 to 6.

Reference numeral B denotes an injection molding die for a gutter joint, which includes a male die 12 and a female die 13 arranged with the male die 12 via a joint body gap t1.

The male type 12 includes the male type main body 10 and the gap t2 for the water blocking material,
First slide block 14 and second slide block 15A for closing and opening t3, and both slide blocks 1
4A and 15A, and a slide core 16A that closes and opens the gap t4 for connecting the water blocking material, which is communicated with the gaps t2 and t3 for the water blocking material. Gap t2 for waterproofing material,
t3 are provided at the upper part and the lower part of the joint body gap t1, respectively.

The first slide block 14 is slidably provided in the horizontal direction so as to open the gap t2 for water blocking material. The second slide block 15A is provided so as to be slidable in the horizontal direction so as to open the gap t3 for water blocking material, and the slide core 16A has a slanted surface 17a on which a ridge 18 is formed. The core part 17 is integrally provided.

The slide core 16A is the second slide block 1
It is arranged above 5A and slides downward in conjunction with the slide of the slide block 15A so as to open the gap t4 for water blocking material.

On the lower surface of the slide core 16A, there is formed a concave strip 19 which is fitted to the convex strip 18 of the second slide block 15A. The inclined surface 17a of the slide core portion 17 is provided with the water blocking material gap t3 when the second slide block 15A is slid.
And the connecting material gap t4 of the water blocking material are formed at an inclination angle such that they are simultaneously opened.

The female die 13 has three rib grooves 20, 20, which can be opened by sliding the first slide block 14 and the second slide block 15 on the first slide block contact surface and the second slide block contact surface. 20 are formed. The female die 13 is provided with an injection device 21 for injecting a soft material into the gap t4 for the connecting material of the water blocking material.

Next, the operation of the injection mold B will be described with reference to FIGS. 7 to 9.

During molding of the joint body, a joint body gap t1 between the male die 12 and the female die 13 is set by an injection device (not shown).
The joint body 1 is formed by filling synthetic resin material into the joint body 1 (see FIG. 7).

As the synthetic resin material, thermoplastic resin such as polyolefin resin, polyvinyl chloride resin, ABS resin and polyamide resin is used.

Further, at the time of molding the waterproof material, the first slide block 1
By sliding 4 and the second slide block 15A, the water blocking material gaps t2 and t3 are opened, and the slide core 16 slides in conjunction with the sliding of the second slide block 15A, and the coupling material gap t4. Is released. At this time, the water blocking material gaps t2 and t3 and the coupling material gap t4 communicate with each other (see FIG. 8).

Then, by filling the opened gaps t2, t3 for waterproofing material and the gap t4 for connecting material with a soft material such as rubber from the injection device 21 through the inlet 23 of the joint body 1, the waterproofing materials 4, 5 and The connecting member 7 is integrally formed with the joint body 1 (see FIG. 9).

Therefore, by the molding die of the first embodiment of the present invention, three protrusions 6 are formed on the outer peripheral surface of one end portion and the inner peripheral surface of the other end portion of the joint body 1.
Water blocking members 4 and 5 having 6 and 6 are integrally formed, and
A connecting member 7 for connecting the water blocking members 4 and 5 is integrally formed on the bottom surface, and the connecting member groove portion 11 of the joint body 1 and the upper surface portions 11a, 7a and the bottom surface portions 11b, 7b are formed on the upper surface of the connecting member 7.
It is possible to mold the gutter joint formed with and with a single injection molding die.

Next, a second embodiment shown in FIGS. 10 to 12 will be described.

First, the gutter joint C shown in FIG. 10 will be described.

This gutter joint C is provided with step portions 2 and 3 for the waterproofing material on the inner peripheral surfaces of both ends of the joint body 1, and the high surface portion 11a and the bottom surface portion 11b of the groove portion 11 for the connecting material are connected to each other. This is an example in which they are formed alternately in a direction orthogonal to the connection direction. Also on the upper surface of the water blocking material 7, the high surface portions 7a and the bottom surface portions 11b are alternately formed, similarly to the connecting material groove portion 11. Other structures and operations are the same as those of the gutter joint A of the first embodiment shown in FIGS. 1 and 2, and therefore, the same reference numerals are given to the drawings and omitted.

Next, the injection mold D shown in FIGS. 11 and 12 will be described.

In this injection molding die D, a rotary pin 22 having an elliptical cross section is provided in the lower portion of the slide core 16B, and the rotary pin 22 is 90
This is an example in which the slide core 16B is provided so as to be slidable downward by rotating by °, and the water blocking material gap t2 is provided below the joint body gap t1.

Therefore, the water blocking materials 4 and 5 are integrally formed at both ends of the joint body 1 by the molding die of the second embodiment of the present invention.
A connecting member 7 for connecting the water blocking members 4 and 5 is integrally formed on the bottom surface, and the connecting member groove portion 11 of the joint body 1 and the upper surface of the connecting member 7 have high surface portions 11a and 7a and bottom surface portions 11b and 7b. It is possible to form the gutter joint in which the parts are alternately formed with one injection mold. Other configurations and operations are the same as those of the first embodiment shown in FIGS.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and the present invention can be applied even if there is a design change or the like within a range not departing from the gist of the present invention. included.

For example, the waterproof material of the gutter joint may be provided on the outer peripheral surfaces of both ends of the joint body. Further, the connecting member groove may be formed by alternately forming the high surface portion and the bottom surface portion, for example, the bottom surface portion and the grid portion may be formed, or the high surface portion and the bottom surface portion may be alternately formed in the connection direction of the gutter joint. You may form in. Further, in the molding die of the embodiment of the present invention, the slide core is slid downward by the slide core portion or the rotating pin, but the slide core may be slid by other means as long as the gap for the connecting material of the water blocking material can be opened. . Further, the water blocking material gap may be provided at the lower part and the lower part of the joint body gap, and three or more slide blocks may be provided to close and open the water blocking material gap. Further, in the case where a plurality of water blocking materials are formed at positions separated from each other, a plurality of injection devices for injecting and filling a synthetic resin material or the like into the water blocking material gap may be provided.

(Effect of the invention) As described above, according to the gutter joint of the present invention, the water blocking material is connected by the connecting material made of the same material, and the high surface portion and the bottom surface portion are alternately provided on the connecting material contact surface of the joint body. Since it is formed, even if the joint parts joined to both ends of the gutter joint expand and contract due to temperature changes, it not only prevents the water stop material from coming off the joint body, but also prevents the water stop material from being positioned relative to the joint body. It is possible to obtain an effect that it is possible to prevent the displacement and the connection member from being turned up.

Due to the above-mentioned effect, even if the injection port for injection molding is provided on the contact surface of the connecting member, water does not leak from the injection port.

Further, according to the injection molding die for the gutter joint of the present invention, the male die is provided with the slide core for closing and opening the gap for the connecting material which is communicated with the gap for the water blocking material, and the high surface portion is provided on the die face of the slide core. Since the bottom and the bottom part are formed alternately, a plurality of water blocking materials are connected by the connecting material, and the gutter joint in which the high surface portion and the bottom surface portion are alternately formed on the connecting material contact surface of the joint body is one injection. It can be molded with a molding die.

In addition, since the slide core that closes and opens the gap for the connecting material that communicates with the gap for the water stopping material is provided, when forming the water stopping material, one of the gap for the water stopping material or the gap for the connecting material of the water stopping material is provided. All the gaps for the water blocking material and the gaps for the connecting material can be filled with the synthetic resin or the like simply by injecting the synthetic resin or the like.

Therefore, the number of injection devices can be simplified, the cost of the molding die can be reduced, and the number of the injection ports to be surfaced is small, so that the gutter joint with high aesthetics can be molded.

In addition, in the first embodiment, the second slide block 1
The slide core portion 17 is integrally formed on the slide core 16 and the slide core 16 is interlocked with the slide of the second slide block 15A.
Since A is configured to slide, the gap t for the waterproof material is
2, t3 and the gap t4 for the connecting material can be opened at the same time, and the labor can be saved in the molding step of the water blocking material.

[Brief description of drawings]

FIG. 1 is a perspective view showing a gutter joint according to the first embodiment of the present invention, and FIG.
1 is a sectional view taken along line II-II in FIG. 1, FIG. 3 is a lateral sectional view showing an injection molding die for a gutter joint according to a first embodiment of the present invention, and FIG.
7 is a sectional view taken along line IV-IV in FIG. 3, FIG. 5 is a sectional view taken along line VV in FIG. 3, and FIG. 6 is a perspective view showing a main part G of FIG. FIG. 9 is an explanatory view showing the action of the injection molding die of the first embodiment, FIG. 4 is a perspective view showing the gutter joint of the second embodiment, and FIGS. 11 and 12 are gutter joints of the second embodiment. FIG. 13 is a cross-sectional view showing an injection mold of the above, FIG. 13 is a cross-sectional view showing a conventional gutter joint, and FIG. 14 is a cross-sectional view showing an injection mold of a conventional gutter joint. 1: Joint main body, 4, 5: Water blocking material, 7: Connection material, 10: Main body, 11: Groove portion for connection material (connection material contact surface) 11a: High surface portion, 11b: Bottom surface portion, 12: Male type, 13: Female type, 14: First slide block, 15A, 15B: Second slide block, 16A, 16B: Slide core, t1: Gap for joint body, t2: Gap for water blocking material, t3: Gap for water blocking material , T4: Gap for connecting material.

Claims (2)

[Claims] 1. A trough joint in which a water stop material made of a soft material is integrally formed in the vicinity of both ends of a joint body in a direction substantially orthogonal to the connection direction, wherein the water stop material is made of a connecting material made of the same material. A gutter joint characterized in that a high surface portion and a bottom surface portion are formed alternately on the connecting member contacting surface of the joint body. 2. A male type body is provided with a plurality of slide blocks for closing and opening the gaps for the waterproofing material, and a female type type body which is arranged with respect to the male type via gaps for the joint body. In the injection molding die for the gutter joint provided, in the male die,
For a gutter joint, characterized in that a slide core for closing and opening the gap for the connecting material, which is communicated with the gap for the water stopping material, is provided, and a high surface portion and a bottom portion are alternately formed on the mold surface of the slide core. Injection mold.