JPH0636723Y2 - Shoe insert material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an improvement of a shoe insert member (hereinafter, simply referred to as an insert member) of a shoe by a direct injection manufacturing method, in particular.

(Prior Art) Conventionally, in golf shoes, soccer shoes, baseball shoes, etc., an insert member is molded as a primary molded product,
After these are installed in a bottom mold, a shoe bottom molding member is injection-injected to make a shoe.

These conventionally known shoe insert members include the following.

That is, as shown in FIG. 10, the recess 16 is formed in the bottom mold 15.
Is formed, and the insert member 17 in which the pin-shaped projection 19 having a function as a spacer is pressed in the concave portion 16 and the insert member 17 is formed, and then the side mold 18 is installed to form a space for forming a sole. It has been known to make a shoe by injection-molding a shoe sole molding member 21 into 20.

Further, as shown in FIG. 11, the side mold 18 and the bottom mold 15 form a recess 16 for holding the resin cutting step 22 of the insert member 17, and the insert member 17 is fitted and installed in the recess 16. It is known that a shoe is made by injecting a shoe sole molding member 21 into a shoe sole molding space 20 after disposing a last 13 in which an upper member 14 is suspended.

Further, as disclosed in Japanese Patent Application Laid-Open No. 54-92441, as shown in FIG. 12, "in a mold for an injection molding machine consisting of a shoe sole covered with an insole and an insole, left and right side walls and a bottom die" , A wall-shaped small protrusion 24 smaller than the outer peripheral edge of the bottom mold 23 of the mold, and one or a plurality of cylindrical protrusions 25 formed in the wall-shaped protrusion 24. Forming a material supply passage 31 communicating with the cylindrical projection 25, and having a through hole 27 into which the cylindrical projection 25 of the bottom mold 23 can be inserted in advance in the small wall-shaped projection 24 of the bottom mold 23.
, And the bottom material is supplied from the cylindrical protrusion 25 to cure and mold the bottom material, and the outer sole and the leather plate 26 and the instep 29 are integrally coupled. A shoe made by the method of manufacturing an athletic shoe described above is already known.

Another known technique is disclosed in JP-A-55-99201, and as shown in FIG. 13, a hole 33 provided in a shoe sole 32 is provided.
There is known a method in which the injection mold 35 is fitted into the bottom mold 34 and the injection pipe 35 is inserted into the hole 33 to inject the injection material.

Further, as disclosed in JP-A-54-148646, as shown in FIG. 14, the projecting edge 39 provided on the lower mold 38 is inserted into the through hole 37 provided on the leather front bottom 36. A method of injection molding a shoe sole material is also known.

(Problems to be Solved by the Invention) However, these conventional shoe insert members have the following problems.

That is, as shown in FIG. 10, in a shoe made by using a pin-shaped protrusion having a pressing function and a spacer function on the insert member, the number of pin-shaped protrusions of the insert member should be If the design was made less, the synthetic resin that is the shoe sole molding member would leak from the gap between the pin-shaped protrusions and wrap around to the grounding surface of the insert member, resulting in a decrease in the yield of molded products. . Therefore, in order to securely hold the insert member in contact with the bottom mold and prevent the shoe sole molding member from wrapping around to the ground surface side of the insert member when the shoe sole molding member is injected and injected, the pin is It is necessary to form a large number of protrusions on the peripheral portion on the upper surface side of the insert member, but this has the drawback that the weight of the insert member becomes heavy, and the synthetic resin that is the shoe sole molding member is injected and injected. At the time, these pin-shaped projections hinder the fluidity of the synthetic resin,
Since it is difficult to uniformly fill the synthetic resin, it has a drawback that it is difficult to form the projection shape, which is the design of the shoe sole, well.

Further, when forming the resin cutting step on the insert member as shown in FIG. 11, the thickness of the resin cutting step should be set in order to securely fit and hold the insert member in the side mold and the bottom mold. Since it has to be 1.0 to 1.2 mm, there is a problem that the total thickness of the shoe sole itself becomes thick and the weight of the shoe itself becomes heavy.

Further, as in the shoe disclosed in JP-A-54-92441 shown in FIG. 12, a metal mold for an injection molding machine including a shoe sole covered with an instep and an insole, left and right side walls, and a bottom die is used. A wall-shaped small projection smaller than the outer peripheral edge of the bottom die and one or a plurality of tubular projections are formed in the wall-shaped projection, and a material supply path communicating with the tubular projection is also formed in the bottom die. After forming and fitting a leather plate having a through hole into which the cylindrical protrusion of the bottom mold can be inserted in advance, the bottom material is supplied to cure and mold the bottom material and In the case of making athletic shoes by integrally joining the sole with the leather plate and the instep, it is good when using a single natural material such as leather plate, but long fiber reinforced which has recently been on the market. Insert member made of hybridized thermoplastic resin (hereinafter abbreviated as FRTP) member and synthetic resin As described above, in the case where warpage occurs due to the difference in the coefficient of thermal expansion, a gap is generated between the bottom mold and the cylindrical projection formed on the bottom mold even when the insert member is used by warping. Therefore, the cylindrical protrusion and the through hole formed in the insert member cannot be fitted properly, so if synthetic resin, which is the shoe sole molding member, is injected and injected, it will leak from this part and wrap around to the ground surface side of the insert member. However, it has a drawback that the yield of the product is significantly reduced.

Further, as in the injection molding method disclosed in Japanese Patent Laid-Open No. 55-99201 shown in FIG. 13, the holes 33 provided in the shoe sole 32 are made into a bottom mold.
When the method of injecting the injection material by inserting the injection tube 35 into the hole 33 while fitting it into the injection tube 34 is used, after the injection material injection is completed, the shoe sole 32 is released from the bottom mold 34. When the hole
A gap is created between the inner wall of 33 and the injection material filled in the injection pipe 35, and the gap is clogged with soil or mud,
When used for a long time, there is a problem that water is impregnated to cause deterioration of the synthetic resin inside.

In the through hole 37 provided in the leather front bottom 36 as in the injection molding method disclosed in JP-A-54-148646 shown in FIG. 14,
When the method of injecting the shoe sole material by inserting the tongue 39 provided on the lower mold 38 of the mold is used, the shoe sole material is injected, and when the shoe sole material fills the voids, the internal pressure increases. , There was a problem that the sole material leaked out from around the edge 39.

Therefore, recently, not only insert members made of synthetic resin materials but also insert members made by hybridizing FRTP member and synthetic resin do not cause resin leakage, durability and moldability. It has been desired to provide shoes having good and light weight.

(Means for Solving the Problems) The present invention has been made in view of these drawbacks of the related art, and an object thereof is to provide an insert member capable of providing a shoe having good moldability and lightweight.

That is, in a golf shoe, a soccer shoe, or the like in which an upper member, a shoe sole molding member, or the like is integrated by a direct injection manufacturing method or the like, a polyurethane resin made of a polyether block amide resin is integrally attached to the shoe sole molding member. Regarding an insert member or an insert member hybridized with polyurethane resin as a matrix, a through hole for injection injection of a shoe sole molding member is provided at an arbitrary position on the ground contact surface side of the insert member, and a hole leading to the through hole The insert member is characterized in that the hollow protrusion having an arbitrary shape provided with is integrally formed with the insert member.

Further, the insert member is used by being formed into a shape that substantially matches the shape of the front stepping portion of the shoe sole or the heel portion.

Further, the insert member may be formed into a shape that substantially matches the shape of the shoe sole and then used.

Further, the hollow projecting portion formed on the insert member may be formed in a tubular shape, a point shape used in soccer shoes or the like, a cleats shape, a stud shape or any other shape.

(Operation) With the configuration as described above, the following operation occurs in the present invention.

That is, in the conventional shoe insert member, due to the warp that tends to occur when a synthetic resin insert member or a hybridized insert member is used, leakage of the synthetic resin does not occur when the synthetic resin that is the shoe sole molding member is injected. Although there is a problem, in the insert member of the present invention, a through hole for injection injection of synthetic resin and a hollow projecting portion provided with a hole communicating with the through hole are integrally formed on the ground surface side of the insert member. Even if the insert member is slightly warped, it is possible to form a recess for fitting and installing the hollow protrusion formed in the insert member at the gate part for injecting the shoe sole molding member formed in the bottom mold by injection. By fitting and installing the hollow protrusion of the insert member in the recess, when the synthetic resin, which is the shoe sole molding member, is injected and injected, the hollow protrusion causes leakage. It can be prevented, moreover the inside of the hollow protrusion synthetic resin is filled, can be molded in a state where the projecting portion inner wall and the synthetic resin of the adhesion, it does not cause a gap.

In addition, even if the insert member is slightly warped, the hollow protrusion is formed integrally with the insert member, so that the injection injection pressure can be maintained without lowering when the synthetic resin is injected and the upper member is suspended. Since the pressure of the synthetic resin that has collided with the bottom of the last thrust acts to push down the insert member toward the bottom mold, the point that synthetic resin leaks due to warpage as in the conventional insert member is almost the same. It can be completely eliminated.

Further, in the present invention, a polyether block amide resin is used as a material for the sole molding member, and a polyurethane resin is used as a matrix of the insert member or the hybridized insert member, so that the sole molding member and the insert member are It is possible to improve the adhesion.

Further, due to the molding pressure at the time of molding, characteristic values such as adhesive strength and peeling strength between the insert member and the shoe sole molding member are improved.

Further, in the present invention, it is light in weight without being said that the weight becomes heavy like the conventional insert member in which a large number of pin-shaped projections are erected and the fluidity of the synthetic resin is hindered by the pin-shaped projections. Moreover, it is possible to supply shoes having good moldability such as the design of the shoe sole.

Moreover, unlike the conventional insert member, it is not necessary to form the resin cutting step with a thickness of 1.0 to 1.2 mm, so it has never been said that the total thickness of the shoe sole itself will be thick, and the shoe sole itself is lightweight. It can be realized.

Further, in the present invention, when the insert member is formed as described above, a hybridized sheet of FRTP member can be used, so that the rigidity and snapping property of the sole can be improved. is there.

Further, when using a synthetic resin or hybridized insert member, even if warpage occurs, it is possible to reduce the manufacturing cost without saying that the synthetic resin leaks and the yield decreases as described above. is there.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 9, the upper member 2, the insert member 3, and the shoe sole molding member 4 are formed by a direct injection method or the like. In the integrated golf shoe 1 or soccer shoe 1 or the like, regarding the insert member 3a made of synthetic resin or the hybridized insert member 3b that is integrally attached to the shoe sole molding member 4, the contact of the insert member 3 A through hole 6 for injection injection for forming the shoe sole molding member 4 is provided at an arbitrary position on the ground side 5, and a hollow projecting portion 7 having an arbitrary shape provided with a hole (a) communicating with the through hole 6 is provided. The shoe insert member is formed integrally with the insert member.

Further, the insert member 3 is used by being formed into a shape that substantially matches the shapes of the front stepping portion 9 and the heel portion 10 of the shoe sole 8.

Although not shown, the insert member 3 may be formed into a shape that substantially matches the shape of the shoe sole 8 for use.

Further, the shape of the hollow projecting portion 7 formed on the insert member 3 can be formed in a tubular shape 7a, a point shape 7b used in soccer shoes or the like, a cleats shape 7b, a stud shape 7b, or any other shape. Is.

For example, in the case of the tubular shape 7a, it is used for golf shoes,
The hollow protrusion can be removed when the shoe is molded, or it can be left as it is.

Also, by forming a washer-like convex portion 7'on the base of the hollow protruding portion,
It is also possible to give an arbitrary design.

Further, in the case of soccer shoes or baseball shoes, the hollow protrusion 7 formed on the insert member 3 has the point shape 7b as described above.
Since the cleats shape 7b, the stud shape 7b, and the like are formed and the hollow protruding portion 7 is provided with a hole (a) communicating with the through hole 6 for injecting the synthetic resin that is the shoe sole molding member 4 by injection,
When the synthetic resin is injected and injected, the through hole 6, the hole (a), and the hollow void portion can be filled with the synthetic resin, so that they can be used in the same manner as ordinary points or cleats formed at other locations. .

The insert member 3 and the shoe sole molding member 4 may be made of the same material, or may be made of different materials.

For example, in the case of the same material, polyurethane resin, polyamide resin, polyether block amide resin or other thermoplastic synthetic resin can be used as the insert member 3 and the shoe sole molding member 4.

On the other hand, when different materials are used, thermoplastic polyurethane resin (TPU) is used in consideration of wear resistance of the insert member, and polyether block amide resin (PEBAX Use of Toray Co., Ltd.) improves the adhesiveness with the thermoplastic polyurethane resin, and particularly enables the weight reduction of the shoe itself.

Further, as shown in FIGS. 2 and 4, it is possible to form a pin-shaped projection 19 in order to serve as a spacer with the last in which the upper is suspended on the upper surface side of the insert member.

As the hybridized insert member, carbon fiber, aramid fiber, glass fiber, silicon carbide fiber, alumina fiber and other reinforced fiber materials are used as FRTP member 3b as shown in FIGS. 5 and 6. It is preferable to use a woven fabric, a non-woven fabric, a mat, a product which has been processed into woven fabrics, etc., impregnated with a polyurethane resin, alone or in an appropriate combination, but a product impregnated with a polyamide resin or other thermoplastic synthetic resin as a matrix. Can be used.

Further, the insert member 3 can be made of a material having the same color as or a color different from that of the shoe sole molding member.

(Effect of the Invention) In the insert member of the present invention, a through hole for injection injection of the shoe sole molding member is provided on the ground surface side of the insert member,
Moreover, since the hollow projecting portion provided with the hole communicating with the through hole is integrally formed, even if the insert member is slightly warped, it is a gate portion for injecting and injecting the shoe sole molding member formed in the bottom mold and A recess is formed in advance for fitting and setting the hollow protrusion formed on the insert member,
By inserting the hollow protrusion of the insert member into the recess, even if the synthetic resin that is the shoe sole molding member is injected and injected, unlike the conventional method of making a shoe using the insert member, the insert member is formed. Since the hollow protrusion prevents the synthetic resin from leaking, the yield of products is significantly improved.

In particular, when a polyether block amide resin is used for the shoe sole molding member and a polyurethane resin is used for the insert member, the adhesion between the shoe sole molding member and the insert member is improved, and the characteristic values such as peel strength are significantly improved. To do.

Further, in the insert member of the present invention, the insert member having a large number of pin-shaped projections becomes heavy, and the pin-shaped projections impede the fluidity of the synthetic resin, so that the insert member is formed on the sole. Since it has never been said that the shape of the design is difficult to obtain, it is optimal for manufacturing shoes that are lightweight and have good appearance and good moldability of the design.

Moreover, unlike the conventional insert member, it is not necessary to form the resin cutting step with a thickness of 1.0 to 1.2 mm, so it has never been said that the total thickness of the shoe sole itself will be thick, and the shoe sole itself is lightweight. It can be realized.

In the present invention, when forming the insert member as described above, a hybrid sheet of FRTP member can be used, so that the rigidity and snapping property of the sole can be improved. is there.

In addition, in the shoe using the insert member according to the present invention, since the thickness of the shoe sole molding member can be appropriately selected, it is possible to prevent the spike pin from being pushed up in a golf shoe or the like.

The insert member according to the present invention can be applied and used in shoes other than the golf shoes, soccer shoes, and baseball shoes mentioned in the embodiments.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an insert member according to the present invention, FIG. 2 is a sectional view of an AA portion of FIG. 1, and FIG.
FIG. 4 is a plan view showing a shoe sole side using an insert member according to the present invention for a golf shoe, FIG. 4 is a sectional view of a main part of a golf shoe using the insert member according to the present invention, and FIG.
FIG. 6 is a perspective view showing another embodiment of the insert member according to the present invention, FIG. 6 is a sectional view of an essential part of FIG. 5, and FIG. 7 is a shoe sole side of a soccer shoe using the insert member according to the present invention. FIG. 8 is a plan view, FIG. 8 is a cross-sectional view of the BB portion of FIG. 7, FIG. 9 is a cross-sectional view of the essential parts of a soccer shoe using the insert member according to the present invention, and FIGS. FIG. 3 is a cross-sectional explanatory view showing how to make a shoe using a conventionally known insert member. 1: shoes, 2: upper member, 3: insert member, 3a: synthetic resin insert member, 3b: hybridized insert member, 4: shoe sole molding member, 5: ground surface side, 6: through hole,
(A): hole, 7: hollow protrusion, 7 ': washer-like protrusion, 8: shoe sole, 9: front tread, 10: heel, 11: spike, 12: point, 13: last, 14 : Upper, 15: Bottom mold, 16: Recessed part, 17: Insert member, 18: Side mold, 19: Pin-shaped protrusion, 20: Shoe sole molding void, 21: Shoe sole molding member, 22: Resin cutting step, 23: Bottom type, 24: Small wall-shaped projection, 25: Cylindrical projection, 26: Leather plate, 27: Through hole, 28: Side mold, 29: Instep, 30: Last, 31: Material supply path, 32: Sole, 33: Hole, 34: Bottom mold, 35: Injection tube, 36: Leather front sole, 3
7: Through hole, 38: Lower mold die, 39: Edge.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B29L 31:50 4F

Claims (2)

[Scope of utility model registration request] 1. In a shoe such as a golf shoe or a soccer shoe in which an upper member, a shoe sole molding member and the like are integrated by a direct injection manufacturing method or the like, the shoe sole molding member made of a polyether block amide resin is attached to and integrated with the shoe sole molding member. A polyurethane resin insert member, or an insert member hybridized using a polyurethane resin as a matrix, wherein a through hole for injection injection of a shoe sole molding member is provided at an arbitrary position on the ground contact surface side of the insert member, and An insert member for shoes, characterized in that a hollow protrusion of an arbitrary shape having a hole communicating with the through hole is formed integrally with the insert member. 2. The hollow projecting portion formed on the insert member is formed in a tubular shape, a point shape used in soccer shoes or the like, a cleats shape, a stud shape or any other shape. Insert member for shoes.