JPH045526B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method of manufacturing an anti-slip net for tires.

(Prior Art) Conventionally, in order to manufacture an anti-slip net for tires, as shown in _FIG . By stretching a wire material coated with unvulcanized rubber and molded around a high-tensile string-like core material made of synthetic fiber, appropriate intervals are created on both inner and outer edges within the mesh groove 42'. The anti-slip net main body having the hooking part for the metal fittings was then braided and then finished by vulcanization press molding at high temperature.

However, since the preforming work of inserting the wire material into the mesh groove 42' of the press mold _a2 ' and braiding the anti-slip net within the mesh groove 42' is done manually, production According to the above-mentioned manufacturing method, a large number of expensive press molds are required to increase productivity, and there is also a need for preliminary work to fit the wire material into the relatively shallow mesh groove 42' of the press molding. Since the molding process is difficult and requires a lot of working time, it has also been a problem in terms of productivity.

Furthermore, the string-like core material 20 made of synthetic fiber
2 has the property of shrinking due to the heat generated when the anti-slip net body preformed in the press mold a ₂ ' is molded while being vulcanized in the press mold a ₂ '. As shown, the hook part 2 of each metal fitting 6'
01, the core material 202 may be drawn toward the inside of the bent portion 201' and become biased.

If the core material 202 of the bent portion 201' is biased inward in this way, when the metal fitting 6' attached to the bent portion 201' is pulled outward during use, the core material 202 will be This is dangerous because it may be rubbed and cut by the metal fitting 6'.

(Technical Issue) The technical issue that this invention aims to solve is to reduce the manufacturing cost and increase production efficiency, and also to To provide a method for producing an anti-slip net in which a thick rubber layer remains and thereby prevents a core material from being rubbed by metal fittings attached to a bent part.

(Means for Solving the Technical Problems) The technical means taken by the present invention to solve the above problems is to use a wire material formed by coating unvulcanized rubber around a string-like core material. The anti-slip net body provided in the preform mold is fitted along the braided mesh path for braiding the main body, and within the braided mesh path, the anti-slip net main body, which has hooking parts for metal fittings on both inner and outer edges, is braided to prevent slipping. A pre-forming process in which each intersection of the stop net body is pressed to temporarily fix the intersection parts, and the non-slip net body is released from the pre-forming mold and grooved into a vulcanization press mold to form a non-slip net. It consists of a vulcanization finishing molding step in which the fitting is fitted into the forming mesh path for forming the main body and heated and press-molded, and the part corresponding to the hooking part of the metal fitting in the braided mesh path of the preforming mold is inserted into the forming hole of the vulcanization press mold. It is characterized by being formed appropriately larger than the portion corresponding to the hook portion in the path.

(Function) According to the above-mentioned means, when the wire material is fitted along the braided mesh path of the preforming mold, the part corresponding to the hooking part in the forming mesh path of the vulcanization press mold is formed in the braided mesh path. The anti-slip net body is braided with a suitably large hooking part formed, and when each intersection of the anti-slip net body is pressed, the wires at the same parts are bonded together due to the viscosity of the unvulcanized rubber. The anti-slip net body is held in shape so that it does not fall apart (preforming process).

The anti-slip net body that has been released from the pre-formed stiffener is fitted into the molded mesh path of the vulcanizing press mold with the parts other than the latching portion corresponding to the latching portion corresponding to the latching portion in the molded mesh path. When the large hooking portion is pushed into the portion corresponding to the hooking portion in the molded mesh path and fitted, the string-like core material in the filament material that constitutes other than the hooking portion will be inserted into the molded mesh path. The core material in the wire material that is located approximately on the central axis of the path and that constitutes the latching portion is biased toward the outer wall side with respect to the central axis of the portion corresponding to the latching portion, centering on the bent portion of this latching portion. To position.

When vulcanization press is performed in this state, the wire material in the part of the anti-slip net body other than the hooking part is finished and vulcanized as it is as it is, and the wire material in the hooking part is centered around the bent part. The string-like core material contracts due to the heat during vulcanization and is drawn inward, and is vulcanized and molded in a state shifted to the central axis position of the corresponding portion of the hook.

(Effects of the Invention) Since the present invention is configured as described above, productivity can be greatly improved by using a preforming mold simply provided with a braided mesh path exclusively for braiding the anti-slip net body (preforming process). It also has the advantage of reducing production costs because it does not require expensive vulcanization press molds to improve productivity.
In the relationship between the braided mesh path of the preform mold and the molded mesh path of the vulcanization press mold, the portion of the braided mesh path that corresponds to the hooking portion is formed to be appropriately larger than the portion of the molded mesh path that corresponds to the hooked portion. During the vulcanization finish molding process, when the core material inside the wire material contracts due to the heat during vulcanization molding, it will be placed outside the central axis of the bent part in the corresponding part of the vulcanization press mold. The core material in the wire material forming the bent part of the hook part is pulled inward and shifted to the central axis position of the bent part in the part corresponding to the hook part, so that the circumference has the required and uniform thickness. is covered with a rubber layer.

Therefore, unlike conventional anti-slip tire nets, the core material in the bent portion of the hook portion is not rubbed and cut by the metal fittings attached to this portion during use.

Thus, the intended purpose can be achieved.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

The manufacturing method of the present invention includes a preforming process in which a non-slip net body is braided in a preform mold using wire material, and the intersecting parts of the non-slip net body are temporarily fixed to maintain the shape. It consists of a vulcanization finishing molding process in which the anti-slip net is heated and press-molded using a vulcanizing press mold, and the preforming process may be performed manually as described below, or by using a preforming device. It is also possible to do this automatically.

The preforming mold _a1 shown in FIG. It has a recessed mesh path 34 with the same mesh pattern as the main body of the anti-slip net, and functions as a jig for braiding the main body of the non-slip net with accurate dimensions.

In this case, the target anti-slip net body B has the mesh pattern shown in FIG.
As shown in the figure, several core materials 1a made of wires, synthetic fibers, glass fibers, etc. are covered with unvulcanized rubber 1b, and extrusion-molded wire materials 1 are made to intersect in an inclined manner. It is braided in such a way that it has a rhombus-shaped mesh and on both sides thereof, hooking portions 2 of approximately ∧-shaped metal fittings 6 are formed protrudingly at regular intervals, and the mesh path 34 of the preforming mold _a1 described above is formed. After inserting the wire material 1 along the mesh path 34 (Fig. 6) and braiding it within this mesh path 34 (preforming step), it is vulcanized using a vulcanizing press mold _A2 as shown in Fig. 10. It is molded by pressing (vulcanization finish molding process).

Vulcanization press mold a ₂ has mesh path 3 of preforming mold a ₁
This is a mold for final molding the preformed anti-slip net body b' in a pre-formed mold in a predetermined shape, and has a forming mesh path 42 on one side for forming the anti-slip net body b.
is precisely recessed in the shape of a groove.

A side end block 33' for folding back the filament 1 into a ∧ shape is provided protruding from the hooking portion 101 of the metal fitting 6 in the braided mesh path ₃₄ of the preforming mold a1. ’ preformed mold
The degree (distance or length) and shape of the outward protrusion of the hooking portion 2' of the non-slip net body b' (see Fig. 4) braided within _a1 is defined.

By the way, the string-like core material 1a installed inside the filament material 1
has the property of shrinking due to the heat generated during vulcanization and molding in the vulcanization finish molding process, and after hot press molding, the string-like core inside the hook part 2' of the anti-slip net body b' There is a tendency for the portion of the material 1a and the bent portion 2'a to be drawn inward and biased.

For this reason, the above-mentioned hooking part corresponding part 1 of the preforming mold a ₁
01 is formed to be appropriately larger than the ∧-shaped hooking portion corresponding portion 103 of the vulcanization press mold _a2 by the side end block 33'. This relationship is shown in Figures 14 to 1.
To explain with reference to Figure 6, Figure 14 shows the preforming mold.
The drawings center around the hooking portion corresponding portions 101 at a ₁ , a 1 ′, a ₁ ″, and FIG _. 15 shows the respective wire members 1 along the hooking portion corresponding portions 101 shown in FIG. This shows the fitted state, and Fig. 16 shows the first
This figure shows the positional relationship between the latching part ₂ ' and the latching part corresponding part 103 when the anti-slip net body b' formed in Fig. 5 is stacked on the formed mesh path 42 of the vulcanizing press mold a2. . First, in FIGS. 14 to 16, the hooking portion 2' of the non-slip net main body b' braided in the preforming process matches the hooking portion corresponding portion 101 in the braided mesh path ₃₄ of the preforming mold a1. 103 indicates a portion corresponding to the hooking portion in the forming mesh path 42 of the vulcanization press mold _a2 . When the above-mentioned anti-slip net main body b' is superimposed on the molded mesh path 42 of the vulcanizing press mold _a2 , the inside of the bent portion 2'a of the hooking portion 2' is the bent portion 1 of the hooking portion corresponding portion 103.
03a is located appropriately outward from the inside, and the hooking part 2'
The length of the two sides of the ∧ shape on the inside is appropriately longer than the length of the two sides of the ∧ shape on the inside of the hooking portion corresponding portion 103 (FIG. 16). i.e. pre-forming mold
When a ₁ and vulcanizing press mold a ₂ are overlapped, the outer edge pin 102 of the side end block 33' of the preforming mold a ₁ fits into the groove inner wall 103b of the hooking part corresponding part 103 in the vulcanizing press mold a ₂ . The length of the two sides of the ∧ shape inside the hooking portion corresponding portion 101 in the braided mesh path 34 of the preforming mold a ₁ is the same as that of the forming mesh path 42 of the press molding mold a ₂ . The length is appropriately longer than the length of the two sides of the ∧ shape on the inside of the hooking portion corresponding portion 103.

This appropriate dimension refers to the bent portion 2'a of the hooking part 2' of the non-slip net body b' braided with the preforming mold _a1 .
When the string-like core material 1a of the filament material 1 is installed in the molded mesh path 42 of the vulcanizing press mold _a2 at a location centered on
It means a dimension that is located on the outer side and is located approximately on the groove center axis m after hot press molding.

A method of forming the hooking portion corresponding portion 101 in the braided mesh path ₃₄ of the preforming mold a ₁ to be larger than the hooking portion corresponding portion 103 in the forming mesh path 42 of the vulcanization press mold a 2, that is, the hooking portion of the preforming mold a ₁ . Stop part corresponding part 10
As a method of forming the length of the two sides of the ∧ shape on the inside ₁ to be longer than the length of the two sides of the ∧ shape on the inside of the hooking part corresponding part 103 of the vulcanization press mold a2, the method shown in FIG. 17 in addition to FIG. As shown, the hook part 2' of the anti-slip net body b'
The shape of the side end block 33' is set so that the bent portion 2'a bulges out in an arc shape as shown in FIG. 18, or the bent portion 2'a is
The shape of the side end block 33' may be set so that it is trapezoidal. Anti-slip net body braided using the preformed mold _a1 constructed in this way
As shown in the figure, the hooking portion 2' in b' has a larger shape with a longer length than the hooking portion corresponding portion 103 of the vulcanizing press mold _a2 .

In addition, the above-mentioned latching portion corresponding portions 101 on both sides of the braided mesh path 34 and both end sides are not restricted on the outside (not grooved), but the template 51 of the template conveyor A ₁ in the preforming device described later Like,
It is also possible to form it into a groove shape like the other parts (see FIG. 27 and subsequent figures).

Next, the braiding process is carried out using the preforming mold shown in Figure 14.
To explain based on FIGS. 2 to 4 using _A1 , the end of the wire material 1 described above is hooked to the starting point 31a at the end of the braided mesh path 34 of the preforming mold _A1 , and While fitting the strip 1 in a zigzag manner along the path shown in FIG. While doing so, return it to the end of the publication point 31a side. At this time, in the hooking portion corresponding portion 101 of the braided mesh path 34, the filament 1 is hooked to the side end block 33' as shown in FIG.
By folding back the shape, a hooking portion 2' is formed.

Subsequently, as shown in FIGS. 3 and 4, the wire material 1 is fitted along the illustrated path while shifting the braided mesh path 34 one row at a time at both ends, reciprocating a total of three times, The wire material 1 is stretched around the entire braided mesh path 34, and the anti-slip net body b' is braided within the groove of the same path 34. At this time, in the hook portion corresponding portion 101 of the braided mesh path 34, as described above,
A hanging portion 2' is formed by hanging the wire material 1 on the side end block 33' and folding it back into a ∧ shape.

Further, another molded connecting band 3 is superimposed on one end of the anti-slip net body a' in the above state, and the wire material 1 at the end of the anti-slip net body b' is entwined with it (FIG. 4). When forming this connecting band 3,
As in the case of the above-mentioned hooking part 2', the molding mesh of the vulcanization press mold _a2 was adjusted in consideration of the fact that the internal string-like core material 1a would shrink due to the heat in the next vulcanization finish molding process. Connecting band corresponding portion 10 in path 42
Form it appropriately longer than 4.

Next, each intersecting portion of the non-slip net main body b' braided within the braided mesh path 34 of the preform _a1 is pressed to temporarily fix the same portion.

Reference numeral 35 in FIG. 7 is a temporary fixing having a mesh-like protrusion 36 projecting from one side that fits into the braided mesh path 34 of the preform a ₁ , and further having pressing pins 37 protruding from each intersection thereof. When temporarily fixing each intersection of the anti-slip net body b', the protrusions 36 of the press plate 35 are fitted into the braided network path 34 of the preform _a1 (the first (Fig. 8), both a ₁ and 35 in the overlapping state are pressed with a press machine for an appropriate time.
As a result, the layers of unvulcanized rubber 1b of both wire members 1 that intersect at each intersection are adhered and temporarily fixed by their viscosity, and the shape of the anti-slip net body b' is maintained so that it does not fall apart. be done. The anti-slip net body b' removed from the preforming mold _a1 is placed by cutting off the excess mesh member 5 on the connecting portion 4 side (FIG. 9).

Anti-slip net body preformed as described above
b' then enters the vulcanization finishing step.

In the vulcanization finishing molding, as shown in FIG. 11, the preformed anti-slip net body b' is fitted into the molding mesh path 42 of the vulcanizing press mold _a2 , and then heated with steam. The heating plate 43 is pressed against the vulcanizing press mold _a2 , and the non-slip net body b' in the same mold _a2 is heated and pressed for about 11 minutes at a temperature of approximately 145°C, thereby forming the pre-formed non-slip net body. b' is finished and formed into a predetermined shape while being vulcanized.

When installing the preformed anti-slip net body b' by fitting it into the molded mesh groove 42 of the vulcanizing press mold _a2 , as shown in FIG. The portion 2' is inserted into the hooking portion corresponding portion 103 in a slightly meandering manner, so that the string-like core material 1a in the hooking portion 2' is centered at the bent portion 2'a. It is located at a position biased towards the outer groove wall 103c from the center axis m of the hooking portion corresponding portion 103. The string-like core material 1a contracts due to the heat applied in the vulcanization finishing molding process, and the string-like core material 1a in the area centered on the bent portion 2'a reaches the center axis line m of the hooking portion corresponding portion 103. In the retracted state, the periphery is covered with a necessary and uniform rubber layer 1b, and a latching portion 2' having the same shape as the latching portion corresponding portion 103 is formed (FIG. 20).

Further, the connecting band portion 3 formed to be appropriately longer than the connecting band corresponding portion 104 in the molded mesh path 42 of the vulcanization press mold _a2 is
It is installed in a slightly meandering state in 4,
In the vulcanization finish molding process, the string-like core material 1a is thermally shrunk to form the shape of the connecting band corresponding portion 104.

After removing the anti-slip net body b from the vulcanizing press mold a ₂ and removing the excess burrs that protruded, attach the latching metal fittings 6 to each latching part 2 as shown in Fig. 13.
At the same time, a tightening rope 7 is attached along the inner edge to complete the process.

As mentioned above, even if the work of braiding the anti-slip net body b' within the braided network path of the preforming mold _a1 is done manually as described above, as will be described below, This may be carried out automatically using a preforming device as shown in FIG. 41.

The preforming device A is for preforming the anti-slip net body b' having the pattern explained in the above embodiment, and includes a template conveyor in which a mesh groove 52 is recessed as a mesh path for braiding the non-slip net body b''. A ₁ and
A temporary fixing part that presses each intersection of the feeding part A ₂ which inserts and braids the wire material 1 into the mesh groove 52 and the non-slip net main body b'' which is braided in the mesh groove 52.
A ₃ and a push-cutting blade A ₄ that cuts the anti-slip net body b'' released from the template conveyor A ₁ to a predetermined length.
It is composed of.

The template conveyor A ₁ includes a plurality of templates 51 connected to each other in a bendable and endless manner by connecting fittings 53, and supported by support drums 5 provided at both ends of a frame 54.
5 and 55', and is constructed so that it can be rotated in both forward and reverse directions by rotating one support drum 55' by a drive motor 56, and the preforming process is performed manually. This corresponds to the preform a ₁ mentioned above in .

The surface of each template 51 is covered with a non-slip net.
A groove 52 is recessed and formed as a braided mesh path for braiding b'', and four release belts extend parallel to the conveyor transport direction along the portion of the mesh groove 52 that does not overlap the mesh intersection. The groove 56 is recessed,
A template conveyor constructed by connecting these templates 51
A mesh groove 52 for braiding the non-slip net main body b'' and four release belt grooves 56 are continuously formed on the transfer surface of _A1 over the entire length of the transfer surface.

Hooking portion corresponding portion 1 in mesh groove 52 of template 51
01' is similar to the case of the manual preforming mold _A1 described above, with the bent portion 101'a protruding outward from the hook corresponding part 103 of the vulcanizing press mold _A2 , as shown in FIG. It is formed appropriately large. By forming the mesh grooves 52 of the template 51 in this manner,
The anti-slip net body is braided within this mesh groove 52.
In the step of heat press forming the net body b'' with the vulcanizing press mold a ₂ , the net body b'' is heated and press molded with the vulcanizing press mold a _2.
16, the latching portion 2'' is located at a position centered on the bent portion 2''a toward the groove outer wall with respect to the groove center axis of the latching portion corresponding portion 103. In the vulcanization finishing molding process, the string-like core material 1a contracts due to the applied heat, and the string-like core material in the area centered on the bent portion 2''a of the latching portion corresponding portion 103 Rubber layer 1 with necessary and uniform surroundings when pulled to the groove center axis position
b, and a hooking portion 2'' having the same shape as the hooking portion corresponding portion 103 is formed.

Four endless mold release belts 59 made of steel are stretched between the support roller 57 provided on the transfer surface of the template conveyor A ₁ and the drive roller 58 at the rear end of the frame 54. is pressed against the bottom surface of each release belt groove 56 by the pressing roller 60, and the belt 59
The template 5 is rotated by the rotation of the drive roller 58 which is interlocked with
1, so as to move on the transfer surface of the template conveyor _A1 .

The running part _A2 provided on the transfer surface of the template conveyor _A1 is provided with six delivery heads 61, 61' for sending out the wire material 1 formed by the wire material 1 forming device D as described above. Be prepared.

As shown in FIG. 24, each delivery head 61, 6
1' is installed vertically on support stands 62, 62', and inside thereof there is a delivery path 63 that penetrates vertically.
The head tip 64 is rotatable, and the head tip 64 is connected by a motor 65 and a belt 66, so that the head tip 64 rotates forward and backward at a predetermined timing. It has been done.

The wire material 1 formed by the wire material 1 forming device D as described above is guided to each delivery head 61, 61' by several guide reels 67, and is fitted into the upper opening of the delivery section 63. Insert the head tip 64
The material is delivered from the lower end of the delivery port 69 to the surface of the template 51 by the rotation of delivery rollers 68, 68 provided therein.
68 is set at a predetermined timing by the motor 70;
It rotates and stops at a predetermined speed.

The delivery heads 61, 61' having the above configuration are divided into two sets of three, and are supported by sliding rods 71, 71'.
Three pieces each are slidably fitted onto spline shafts 72 and 72' provided on support stands 62 and 62' that reciprocate in a direction perpendicular to the transfer direction of the template conveyor _A1 . Further, the delivery heads 61, 61' supported in a row on the coaxial shafts 72, 72' are spaced apart from each other by two meshes of the mesh groove 52, and the tightening screws 73 are tightened. Fixed to.

Furthermore, the two sets of support stands 62 and 62' described above are
A threaded portion 73 provided on the lower surface of the bases 62, 62' is threaded onto threaded shafts 75, 75' which are rotated in forward and reverse directions by feed motors 74, 74', and
The feed heads 61, 61' installed on the support stands 62, 62' are located at one end and the other end of the mesh groove 52, and the feed motors 74, 74' are connected to each other. By rotating in opposite directions at the same timing, the delivery heads 61, 6 installed on both the support stands 62, 62' in the above state are
The rows 1' reciprocate alternately on the transfer surface of the template conveyor _A1 with strokes c and c, which are the same width as the width from the hook corresponding part 101' on one side of the mesh groove 52 to the side edge 8 on the other side. I will do it like that. (Figures 25 and 26) The above-mentioned template conveyor A, the transfer movement, and the reciprocating movement of both supports 62 and 62' are linked as described later.
Wire material 1 delivered from each delivery head 61, 61'
is fitted into the mesh groove 52 of the template conveyor A ₁ along a predetermined path.The fitting path of the wire material 1 during braiding will be described below.

FIG. 27 is a drawing showing the transfer surface of the template conveyor _A1 , and each delivery head 61, 61' is connected to the second
It reciprocates along the movement lines l and l' shown in FIG. 7 with the aforementioned strokes c and c. Each wire material 1 fed out by the feeding heads 61, 61, 61 of the support base 62 is fitted in a staggered pattern along the mesh groove path d shown in FIG. , 61' are fitted along the mesh groove path d' shown in FIG. As shown in FIG. 30, the anti-slip net body b'' is continuously braided in the conveyor transport direction by being fitted into all mesh grooves 52 and intersecting each other (No. 31).
figure).

Next, a template conveyor is used to move each delivery head 61, 61' along the above-mentioned path.
The cooperation between _A1 and the support stands 62, 62' will be explained.

Both delivery heads 61 and 61' are always moved in opposite directions, but the non-slip net body
b'', as shown in FIGS. 28 and 29, the mesh groove paths d and d' into which the wire material 1 is inserted are symmetrical, so the amount of movement and the timing of starting and stopping the movement are the same. Therefore, both heads 61, 61' are operated symmetrically.

During braiding, the template conveyor A ₁ operates intermittently, and the bent portions e ₁ , e ₂ , e ₃ , e ₁ ′ on both sides of the mesh groove paths d and d′ shown in FIGS. 28 and 29 , e ₂ ′,
When e ₃ ' comes onto the moving lines l, l' of the delivery heads 61, 61', control is performed so that the conveyance moves while stopping for a predetermined period of time.

The template conveyor _A1 moves as described above, and along with this, the paths d and d' of the mesh groove 52 shown in FIGS. It passes below the movement lines l and l' towards the edge of the pushing cutting blade _A4 . In response to this transfer movement, both the support stands 62, 62' have the respective delivery ports 69, 69' of the delivery heads 61, 61' provided on the support stands 62, 62'.
The movement lines l, l' of these sending heads 61, 61',
The respective delivery heads 61, 61' work together so as to always move directly above the intersection with the mesh groove paths d, d'.

That is, the movement line l of the sending heads 61, 61'
The intersection point between l' and the zigzag-shaped mesh groove paths d and d' moves back and forth on the same movement lines l and l', and the above-mentioned delivery heads 61 and 61' follow this intersection point. It reciprocates alternately on the respective movement lines l and l'.

Next, the functions of each part of the template conveyor _A1 and the delivery section _A2 when fitting the wire material 1 along the above-mentioned mesh groove paths d and d' will be explained.

When starting braiding, the delivery heads 61, 61' may be placed in any position, but in this case, as shown in FIGS. Braiding is started using the bent portions e ₁ and e ₁ ′ as starting points.

With the movement of the template conveyor _A1 , the support stand 62,
62' are moved together as described above, and the wire material 1 delivered from each delivery head 61, 61' is fitted along the mesh groove paths d, d' as shown in FIG. .

From the starting point to the bent portions e ₂ , e ₂ ′ of the side edge 8′,
The template conveyor A ₁ and the supports 62, 62' are operated at a predetermined speed ratio, and only the template conveyor A ₁ is operated up to the bent portions e ₂ , e ₂ ′ or the bent portions e ₃ , e ₃ ′. from the bent portions e ₃ , e ₃ ′ to the hooking portion corresponding portion 101 ′ which is three positions beyond the starting point, and the bent portion e ₁ ,
While moving the template conveyor A ₁ until e ₁ ′,
The support stands 62, 62' are moved in the opposite direction to the above-mentioned direction, and the above-mentioned operation is repeated to continuously braid the non-slip net body b''.

In addition, the template conveyor A ₁ and the support stands 62, 62' have respective bent portions e ₁ , e ₂ , e ₃ , e 1 ′, e ₂ ′ of the hooking portion corresponding portion 101 ′ and the side edge portion 8 _′ . , e ₃ ', it is stopped for a predetermined time. At this time, each sending head 61, 6
1', the heads 61, 61' are directed in the same direction as the next mesh groove paths d, d', and thereby the mesh grooves 5 are rotated from each delivery head 61, 61'.
To prevent twisting of the wire material 1 fitted into the wire member 2.

The anti-slip net main body b'', which has been knitted in the mesh groove 52 of the template conveyor _A1 as described above, is gradually transferred toward the end of the template conveyor _A1 .

A temporary fixing section _A3 is provided between the delivery section _A2 and the terminal end of the template conveyor _A1 to press and temporarily fix each intersection of the non-slip net main body b'' braided within the mesh groove 52.

The temporary fixing part A ₃ is provided with a movable plate 81 installed between support rails 80, 80 provided on both sides of the template conveyor A ₁ , and both ends of the plate 81 are fitted to the rails 80, 80 to support it so as to be slidable. In addition, a pressing plate 84 having a large number of pressing pins 83 (pressing members) protruding is provided on the lower center surface of the moving plate 81, and the moving plate 81 moves the template conveyor _A1 by the expansion and contraction movement of the hydraulic cylinder 87. It is designed to move back and forth on a surface.

The pressing pins 83 are provided protrudingly at each intersection of the anti-slip net body b'' on the lower surface of the pressing plate 84,
The press plate 84 is held movably up and down by press cylinders 85, 85 fixed to the movable plate 81, and when the press plate 84 is lowered by the press cylinders 85, 85, the lower surface of the press plate 84 Each pressing pin 83 protruding from the mesh groove 52 presses each intersection of the non-slip net main body b'' braided within the mesh groove 52.

The pressing plate 84 is lowered while the template conveyor _A1 is stopped, and the plate 84 is lowered at a position behind the support rails 80, 80, and the pressing pin 83 is used to push the non-slip net body b'' After that, the moving plate 81 is moved to the front of the support rails 80, 80 as shown in FIG. 32, and after lowering the pressing plate 84 again, the moving plate 81 is returned to its original position. Then, the above-described operation is repeated every time the anti-slip net main body b'' is moved by the length of the temporary fixing range f.

Anti-slip net body temporarily fixed at each intersection
b'' is kept in shape so that it does not fall apart even when released from the mold, and is released from the mold plate 51 by a mold release belt 59 after being transferred to the rear end of the mold plate conveyor _A1 .

As mentioned above, the mold release belt 59 is pressed against the bottom surface of the mold release belt groove 56 recessed in the mold plate 51 and moves together with the mold plate conveyor A ₁ , and has a non-slip braided in the mesh groove 56 . The net body b'' is braided on the above-mentioned release belt 59.The part of the non-slip body b'' that reaches the end of the template conveyor _A1 is connected to the support drum 55' on the rear end side. The mold is released from the mold plate 51 which is folded downward by the mold conveyor A1, and rides on each mold release belt 59 stretched toward the drive roller 58 so as to extend the transfer surface of the mold conveyor _A1 , and presses the rear end of the frame 54. Transferred towards blade A ₄ .

The anti-slip net main body b'' on the mold release belt 59 is transferred to the rear end of the mold release belt 59 while its upper surface is pressed by the rotating feed belt 86, and cut into a predetermined length by a push-cutting blade _A4 .

The push cutting blade _A4 is a support 90 provided at the rear end of the frame.
The blade is supported so that it can move up and down between 90 and 90, and an electric heater 91 is attached to the side of the blade so that the entire blade _A4 can be heated to a predetermined temperature. The blade edge is pressed against the cutting position of the anti-slip net body b'' which has been pushed backwards by a predetermined length from the push-cutting blade _A4 , and the body is cut by the heat of the blade _A4 .
The anti-slip net body b'' is cut into a predetermined length by pressing the member b'' while softening it (Fig. 23).

The anti-slip net body is automatically formed and cut into a predetermined length by the preforming device A as described above.
b' has a connecting band corresponding part 104 in the molded mesh groove 42 of the vulcanizing press mold _a2 , as described above, at one end thereof.
Attach the connecting band 3 which has been made longer as appropriate,
After cutting off the excess mesh, it is transferred to the vulcanization finishing process as described above.

The above-mentioned preforming device A is set so that the anti-slip net body b' having the mesh pattern shown in FIG. 32 is used for preforming, but the pattern of the mesh grooves 52 of the template conveyor _A1 and , the number of delivery heads 61, 61' to be used, and the temporary fixing part
By changing the arrangement of the pressing pins 83 of _A3 , it is possible to preform the anti-slip net main body with an arbitrary mesh pattern.

For example, the anti-slip net C shown in FIG.
is braided with four wire members 1, 1, 1', 1', and when braiding the main body C'' of this anti-slip net, the template 51 of the template conveyor _A1 is Of the delivery heads 61 and 61', the mesh groove 52 is replaced with the pattern of the anti-slip net body C, and three of the wire materials 1 and 1' are provided on both support stands 62 and 62'. A total of 4 pieces, 2 pieces each, are used for transmission.

At the time of braiding, the sending heads 61, 6 of the support stand 62
1 in a zigzag manner along the mesh groove paths g and g' as shown in FIG.
The delivery heads 61', 61' of the support stand 62' are connected to the 35th
While moving along the mesh groove paths h and h' shown in the figure, the wire material 1' is placed in the mesh groove 52 of the paths h and h'.
1' and the 36th hole in the entire mesh groove 52.
The anti-slip net main body C'' having a mesh pattern as shown in the figure is braided.

Then, the anti-slip net main body C'' braided within the mesh groove 52 is crimped at each intersection with a temporary fixing part _A3 in which pressing pins 83 are arranged in accordance with the position of each intersection of the main body C''. Temporarily fasten.

In addition, the above-mentioned anti-slip net main body C uses a wire material 1' forming the side edge 8' of the main body C without a core material, and has a relatively high tensile strength. The structure is simplified by eliminating the core material of the wire material 1' along the unnecessary side edge portion 8'.

In the case of the anti-slip net body b mentioned above, if you use some wire materials without a core material among the six wire materials 1 used, some of the core materials may be included. There is no anti-slip net on the main body, which can be braided.

Furthermore, the preforming device A is capable of braiding the anti-slip net with only one delivery head.

In this case, any one of the six delivery heads 61, 61', for example, the delivery head 61 of the support base 62,
, and insert one wire member 1 into the mesh groove 52 from the starting point j along the mesh groove path i shown in FIGS. 37 to 40 in one stroke.

During braiding, when the delivery head 61 moves to the front end or rear end of the mesh groove path i shown in the figure, the transfer direction of the template conveyor _A1 is switched to the reverse or forward direction,
The template conveyor is centered around the moving line l of the delivery head 61.
While reciprocating the transfer surface _A1 , the wire material 1 is fitted into the mesh groove 52 of the path i, and a single anti-slip net body b' is braided.

Once the anti-slip net body b' has been braided, cut the rear end of the wire material 1, and then attach each intersection to a temporary fixing section.
Temporarily fasten at A ₃ in the same way as above.

When braided with a single wire material 1 as described above, the anti-slip net b' is braided to a predetermined length within the template conveyor _A1 , so there is no need to cut it with the push cutting blade _A4 .

As described above, in the present invention, the mesh pattern of the anti-slip net formed by the pre-forming mold and the vulcanization press mold is not limited to the above-mentioned anti-slip nets b and c, and the mesh pattern of the pre-forming mold and the vulcanization press mold are By forming the molding mesh grooves of the press mold into a desired mesh pattern, it can be set arbitrarily, and the part corresponding to the hooking part in the braided mesh path of the preforming mold is the part corresponding to the hooking part in the molding mesh path of the vulcanization press mold. It is characterized by being formed appropriately larger than the corresponding part.

[Brief explanation of drawings]

Figures 1 to 4 are plan views showing the preforming mold and the fitting path of the wire material, Figure 5 is a perspective view showing the extrusion section of the wire material extrusion molding device, and Figure 6 is a plan view showing the preforming mold and the fitting path of the wire material. A perspective view of the state in which the strips are fitted,
FIG. 7 is a plan view showing the press plate, FIG. 8 is a front view showing the preforming image and the press plate, FIG. 9 is a plan view showing the anti-slip net body after preforming, and FIG.
The figure is a plan view of the vulcanizing press mold, Fig. 11 is a perspective view showing the state in which the preformed anti-slip net body is fitted into the forming mesh path of the vulcanizing press mold, and Fig. 12 is the state of hot press molding. Fig. 13 is a plan view of the anti-slip net for tires, Fig. 14 is an enlarged plan view of the corresponding part of the latch part in the preforming mold, and Fig. 15 is a front view of the vulcanization press mold and heating plate. An enlarged plan view showing the state in which the material is fitted into the corresponding part of the latching part of the preforming mold, and FIGS. Fig. 19 is an enlarged plan view showing the hooking portion of the anti-slip net body immediately before hot press forming, and Fig. 20 shows the hooking portion after hot press forming. FIG. 21 is a partially cutaway plan view showing the preforming device, FIG. 22 is a partially cutaway front view of the same, and FIG.
Figure 3 is an enlarged vertical sectional view from the delivery part to the pushing cutting blade in Figure 22, Figure 24 is a longitudinal sectional side view of the delivery part, and Figure 25
26 and 26 are plan views showing the support base that reciprocates with each other, FIGS. 27 to 31 are plan views showing the template conveyor and the mesh groove path, and FIG. 32 is the plan view of the braided anti-slip net main body. A plan view showing the pressing part,
Figure 33 is a front view showing a non-slip net consisting of a wire material with a core material and a wire material without a core material;
4 to 36 are plan views showing the template conveyor of the anti-slip net and its mesh groove route, FIGS. 37 to 40 are plan views showing the template conveyor and the mesh groove route of the single piece, and FIG. 41 42 and 43 show a conventional example, and FIG. 42 is a plan view of a vulcanization press mold. The figure is a longitudinal cross-sectional view showing a hook part of a conventional anti-slip net. In the figure, _a1 : preforming mold, _a2 : vulcanization press mold,
b: Anti-slip net body (after vulcanization press molding),
b′: Anti-slip net body (before vulcanization press molding),
b'': Anti-slip net body (continuous state), 1: Wire material, 1a: Core material, 1b: Rubber, 34, 52: Braided mesh path, 42: Molded mesh path, 51: Template (preformed mold) .

Claims (1)

[Claims] 1. A wire material formed by coating unvulcanized rubber around a string-like core material is fitted along the braided mesh path for braiding the anti-slip net body provided in the preforming mold to form the braided mesh path. Inside, a non-slip net body with metal hooks on both inner and outer edges is braided,
A preforming step in which each intersection of the anti-slip net body is pressed to temporarily fix the intersection, and the anti-slip net body released from the pre-forming mold is molded into a vulcanization press mold with groove-shaped recesses. It consists of a vulcanization finishing molding step in which the locking net is fitted into the formed mesh path for forming the main body and heated and press-molded, and the part corresponding to the hooking part of the metal fitting in the braided mesh path of the preforming mold is inserted into the vulcanization press mold. A method for producing an anti-slip net for a tire, characterized in that the net is formed to be appropriately larger than the portion corresponding to the hook portion in the formed mesh path.