JP3002412B2 - Adhesive coating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive applying apparatus suitable for applying an adhesive to the lower surface of a long belt, particularly a belt-like tread rubber extruded from a rubber extruder or the like at the time of molding a green tire. About.

[0002]

2. Description of the Related Art For example, in forming a pneumatic tire, a raw tire is formed by sequentially bonding tire members such as a carcass, a breaker, sidewall rubber, and tread rubber on a drum. In order to ensure the adhesion between the tread rubber and the tire member inside thereof, an adhesive such as rubber glue is applied to the lower surface of the tread rubber which is extruded and molded from a rubber extruder or the like in advance. .

On the other hand, an apparatus for applying the adhesive is, for example, as shown in FIG. 10, which is supported by a container filled with the adhesive a so that the adhesive a is adhered to the outer peripheral surface. The apparatus includes an application roller b and a cylindrical weight d that presses the tread rubber c against the adhesive application roller b when the tread rubber c passes over the adhesive application roller b.

The weight d is formed as an aggregate of a plurality of weight discs d1 bundled in the thickness direction in order to keep the pressing pressure constant. The width of the weight d is larger than the width of the tread rubber. When it is small, the pressing force at both ends of the tread rubber is insufficient, and the application of the adhesive becomes insufficient.
Conversely, when the width is larger than the width of the tread rubber, the outer weight disc d1 protruding from the tread rubber contacts the adhesive application roller b, thereby causing contamination due to adhesion of the adhesive. Accordingly, it is necessary to adjust the width of the weight d in accordance with the width of the tread rubber.

[0005]

Conventionally, for adjusting the width of the weight d, a variety of widths are prepared in advance, and an assembly suitable for the width of the tread rubber is appropriately selected from these assemblies and attached to the apparatus. I was

However, in this case, it is necessary to prepare various types of aggregates, which is not only uneconomical, but also impairs workability and productivity such as frequent attachment and detachment of the aggregates.

Therefore, according to the first aspect of the present invention, the fork supported so as to be able to move laterally is inserted from the outer end of the weight assembly, and the outer weight disk is positioned higher than the inner weight disk. The purpose of this is to provide an adhesive application device that can adjust the pressing width of the weight assembly to the adhesive application roller freely, and can perform the application operation easily and efficiently. .

Another object of the present invention is to provide an adhesive applying apparatus which easily locks a weight disc with a fork.

According to the third aspect of the present invention, the height of the weight assembly can be easily adjusted without obstructing the operation of the pressing tool, the lifting / lowering tool, and the moving fork tool, and the structure can be simplified. It is intended to provide a glue application device.

Another object of the present invention is to provide an adhesive applying apparatus capable of adjusting a pressing width of a weight assembly on the basis of a center.

[0011]

Means for Solving the Problems In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is an adhesive applying apparatus for applying an adhesive to one surface of a long strip. An adhesive application roller having an adhesion surface on which the adhesive is adhered to the outer periphery, and the adhesion surface being perpendicular to the strip being conveyed in the longitudinal direction and receiving the lower surface thereof; A support shaft that ascends and descends above the adhesive application roller, and a plurality of weight disks having the same diameter as each other and having a center hole with a larger diameter than the support shaft are inserted through the support shaft and overlapped. A pressing tool comprising a weight assembly suspended and held on a support shaft; and a lifting and lowering device that moves up and down together with the support shaft supported by the elevating device and moves in parallel with the support shaft. Insert from the outer end of the aligned weight A moving fork tool having a fork for locking a number of outer weight disks corresponding to the length at a height higher than the height of the suspension, and being suspended on the support shaft without being locked by the fork; It is characterized in that the upper surface of the band is pressed by the inner weight disk.

According to a second aspect of the present invention, in the configuration of the first aspect, the fork is provided in a gap between the center hole of the weight assembly and the support shaft, the height of which is adjusted, and the support shaft is provided. It is characterized by being inserted at a higher position.

According to a third aspect of the present invention, in the first aspect of the present invention, the height aligning device is formed so as to be retractable forward or backward in the conveying direction of the band. .

According to a fourth aspect of the present invention, in the configuration of the first aspect, forks are arranged at both ends of the weight assembly.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described.
This will be described together with the illustrated example. As shown in FIGS. 1 to 4, an adhesive application device (hereinafter referred to as “apparatus 1”) is used to press an adhesive application roller 3 having an adhesive J attached on its outer periphery and a band K against the adhesive application roller 3. A pressing tool 5 having a weight assembly 4, a fork 6 inserted from the outer end of the weight assembly 4, and a moving fork device 7 for adjusting a pressing width W of the weight assembly 4 by a lateral movement; A lifting and lowering tool 9 for supporting the lifting fork 5 and the moving fork 7;
And a height aligning device 10 that enables the lateral movement of the fork 6 by adjusting the height of the weight assembly 4.

In the present embodiment, the apparatus 1 is a so-called tread line licking apparatus which is employed for applying an adhesive J to the lower surface of a tread rubber for molding a green tire. The belt K (tread rubber) extruded from the belt is arranged on a line of a conveyor 11 that transports the belt K in a length direction.

The adhesive application roller 3 is pivotally supported by a container-like support 12 having an upper opening disposed between the conveyors 11 and 11. When the adhesive application roller 3 rotates, an adhesion surface 3S to which the adhesive J filled in the support 12 adheres is sequentially formed on the outer periphery of the roller. The adhesive application roller 3 has its axis aligned at right angles to the transport direction of the belt body K and its outer peripheral upper edge arranged at the same height as the transport height. Therefore, the adhesive surface 3S of the adhesive J is The lower surface of the band K is received in a straight line along the transport direction, and is supported so as to be capable of being sent out.

The pressing tool 5, the moving fork tool 7, the lifting / lowering tool 9 and the height aligning tool 10 of the apparatus 1
For example, it is attached to a gate-shaped frame 2 that straddles 1.

In the present embodiment, the lifting and lowering tool 9 is a pair of tilting arms 13 pivotally attached to the side plates 2A on both sides of the frame 2, respectively.
And a linear driver 15 such as a cylinder for driving the tilting arm.

The tilting arm 13 is in the form of an arm extending from the pivot point P1 at the rear end toward the downstream side (forward) of the conveyance, and rises substantially upward at the front end thereof.
A mounting plate 16 for mounting is fixed. The rigidity of the lifting / lowering tool 9 is enhanced by integrally connecting the reinforcing members 17 between, for example, the upper ends of the mounting plates 16. Also tilting arm 13
The rod end of the linear drive unit 15 is connected to a force point position P2 separated from the pivot point P1, and in the present example, the rod is moved forward and backward in the present example, thereby causing the tilting movement as shown in FIG. The arm 13 is tilted up and down between the lowering position Y1 and the raising position Y2 in a vertical plane.

The pressing tool 5 is located above the adhesive coating roller 3 and spans between the front ends of the tilting arms 13, and the weight assembly 4 held by the spindle 19. Equipped. In this example, the inclination of the tilting arm 13 at the descending position Y1 and the ascending position Y2 is substantially symmetrical with respect to a horizontal line L0 passing through the pivot point P1, and thereby, at each position Y1, Y2. The position of the support shaft 19 is arranged on a vertical plane N passing through the axis of the adhesive application roller 3.

The weight assembly 4 is composed of a plurality of weight disks 21 having the same diameter as each other and having a central hole 20 larger in diameter than the support shaft 19, and each weight disk 21 is arranged in the thickness direction. The center holes 20 are overlapped with each other and
9 and suspended. The weight aggregate 4 is
As shown in FIGS. 3 and 4, movement and displacement in the axial direction are prevented by the engagement pieces 22 at both ends fitted to the support shaft 19, for example. The weight disk 21 has a thickness of about 5 cm, and the diameter D1 of the center hole 20 is
Is preferably about 2.0 to 2.5 times as large as the diameter D2. As shown in FIG. 5, when the weight disc 21 is hung on the support shaft 19 at the lowering position Y1, the weight disc 21 can come into contact with the adhesive application roller 3, and the weight of the weight disc 21 can be reliably applied by the adhesive. It is preferable to act on the roller 3. Thereby, from the thing of a thin thickness to that of various thicknesses, the band body K
Can be pressed freely against the adhesive application roller 3. However, a gap may be provided between the suspended weight disk 21 and the adhesive application roller 3 in a range smaller than the minimum thickness assumed for the band K.

The moving fork member 7 includes the fork 6
And a moving bracket 25 disposed on both ends of the weight assembly 4 and a driving unit 26 for moving the moving bracket 25 laterally.

The drive section 26 has a drive screw shaft 27 and a guide shaft 28 which are bridged between the mounting plates 16 and 16 and extend in parallel with the support shaft 19.
Is rotatably supported by the support plate 16,
A left-hand thread 27A is formed on one side of the central connector, and a right-hand thread 27B is formed on the other side. The drive screw shaft 27 is driven by a motor M connected to one end thereof so as to be able to rotate forward and backward, and the number of rotations, the rotation angle, and the like are determined by a rotation detector 29 such as a so-called rotary encoder provided at the other end. Detected and controlled. Note that the drive screw shaft 27 and the motor M can be connected via an appropriate transmission / reduction means using a belt, a chain wheel, a gear, or the like.

The moving bracket 25 is guided laterally along the guide shaft 28 by the passage of the guide shaft 28, and the movable bracket 25 is moved to the left and right threaded portions 27 A and 27 B of the drive screw shaft 27. By being screwed with each other, the drive screw shaft 27 is laterally moved inward, ie, approaching each other, and outward, ie, away from each other, in accordance with forward rotation and reverse rotation of the drive screw shaft 27.

As shown in FIGS. 1, 3, and 4, the movable bracket 25 is inserted into the bracket portion 25A extending from the outer end of the weight assembly 4 to the outer end of the weight assembly 4. A fork 6 protrudes. The fork 6 is inserted into the center hole 20 of the weight assembly 4 and into the gap G1 between the upper edge of the center hole 20 and the support shaft 19,
As a result, a group of outer weight disks 21A of a number corresponding to the insertion length L of the fork 6 is locked at a height higher than the height of the suspension. In the present embodiment, the fork 6 has a rectangular shaft shape with a vertically long cross section, and its inner end is formed by a downward slope having an acute angle on the upper edge side, so that the fork 6 is securely locked over the entire insertion length. Perform

In this example, the fork 6 moves laterally when the weight assembly 4 is supported by the height aligning tool 10 and the center holes 20 of the weight discs 21 are aligned. The lateral movement adjusts the pressing width W. The pressing width W is equal to the width of the group of inner weight disks 21B suspended on the support shaft 19 without being locked by the fork 6.

In the present embodiment, the height aligning tool 10 is provided with a tray 31 for receiving the lower surface of the weight assembly 4 at a height position Y3 between the lowering position Y1 and the raising position Y2.
And a drive unit 32 that draws and moves the tray body 31 forward or backward in the transport direction.

In the present embodiment, the tray body 31 has a V-shaped receiving surface 31A which extends upward and backward from the curved point R and extends forward and backward. At a front position Q1 where the curved point R is on the vertical surface N, The tray body 31 can receive each of the weight disks 21 on the V-shaped receiving surface 31A, and can align the weight disks 21 at the same height and concentric with each other.

The driving unit 32 includes a horizontal linear driver 33, such as a cylinder, which is attached to the upper plate 2B of the frame 2 and moves back and forth.
And guides 35, 35 extending in parallel with each other. The rod end of the linear driver 33 is fixed to a vertical piece 32B of the tray body 31 rising from the rear end of the receiving surface 31A, and a support shaft 36 extending rearward from the vertical piece 32B is supported by the guide 3.
5 is engaged. Therefore, by the forward / backward movement of the drive unit 32, the tray body 31 is moved from the front position Q1 to the rear position Q2 which is located behind the weight assembly 4 in the backward direction.
It moves backward while being supported horizontally.

The angle θ of the receiving surface 31A of the receiving body 31 with respect to the horizontal plane is about 10 ° ± 5 ° in this embodiment as shown in FIG. When forming, for example, while lifting up the weight assembly 4 suspended at the ascending position Y2, the tray 31
Can be moved to the front position Q1. That is, the stop at the height position Y3 can be eliminated, and the height restraint of the weight assembly 4 can be configured to be performed directly at the ascending position Y2. At this time, the number of steps of adjusting the pressing width W is reduced. Can be reduced. In any case, the tray 31
Must be set such that a gap G2 is formed between the support shaft 19 and the lower edge of the center hole 20 when the height of the weight assembly 4 is reduced.

The apparatus 1 also includes a non-contact type detector 39 such as a photoelectric tube that moves the lifting / lowering tool 9 up and down by detecting the front and rear ends of the band K conveyed by the conveyor 11. Will be arranged.

However, as shown in FIG.
The weight assembly 4 can be divided into a group of outer weight disks 21A, 21A locked by the fork 6, and a group of suspended weight disks 21A located inside the weight disk 21A.
The group of the suspended weight disks 21A presses the band K to the adhesive application roller 3 over the entire width thereof, so that the adhesive J can be applied to the lower surface of the band K. At the time of pressing, a suspended weight disk 21 that rolls with the band K.
In order to prevent the A group from swinging back and forth during rolling,
For example, a front plate and a rear plate (not shown) for preventing deflection of the weight disk may be provided.

The adhesive applying roller 3 is moved by the pushing force from the belt K which is conveyed and pressed.
The lower surface is rotated so as to roll, and the attachment surface 3S is successively
By continuously contacting the lower surface, uniform application is performed. When the rear end of the band K passes through the adhesive application roller 3 and the application operation is completed, the adhesive application roller 3 stops due to the loss of the pushing force, and accordingly, the hanging weight circle is suspended. The adhesive J is prevented from fouling the group of plates 21A.

Prior to the end of the coating operation, the apparatus 1
The detector 39 detects the rear end of the band K, and activates the lifting / lowering tool 9 after the end of the coating operation via delay means such as a timer. The lifting tool 9 moves the pressing tool 5 at the lowering position Y1 to the raising position Y2, as shown in FIG. Further, after the tray body 31 has advanced from the rear position Q2 to the front position Q1 by the operation of the drive unit 32, the lifting / lowering tool 9 lowers the pressing tool 5 to the height position Y3 as shown in FIG. By placing the weight assembly 4 on the tray 31, the height of the weight assembly 4 is adjusted.

Next, the width of the belt K to be conveyed is input to the apparatus 1. Thereby, with the rotation of the drive screw shaft 27,
The moving brackets 25, 25 move laterally, and insert the fork 6 to a position of the insertion length L corresponding to the required pressing width W. The width of the band K may be input directly by an operator, or may be automatically input in correspondence with the product number of the band K or the like. The insertion length L is managed and controlled by the rotation detector 29.

Thereafter, the operation of the drive unit 32 causes
The tray body 31 is moved backward from the front position Q1 to the rear position Q2, and the detector 39 is moved to the next band K to be conveyed.
Then, as shown in FIG. 8, the pressing tool 5 is lowered to the lowering position Y1. The height adjustment by the tray 31 may be performed at the ascending position Y2 as described above.

The adhesive application roller 3 rotates together with the bite of the belt K to be conveyed next, and the application of the adhesive J is restarted.

FIG. 9 shows another embodiment of the present apparatus 1.
As shown in the figure, a frame 1 includes a gate-shaped base 40 that straddles the conveyor 11, and a table 41 that is mounted on the upper surface of the base 40 via a guide 41 so as to be movable in a direction perpendicular to the transport direction. Equipped. The guide 41 has rails 43, 43 perpendicular to the conveying direction arranged on the upper surface of the base 40, and a screw shaft 45 supported in parallel with the rail 43. Connect the handle. The table 41 has the pressing tool 5, the moving fork tool 7, the elevating tool 9,
And the height aligning tool 10 is similarly attached, and the lower surface of the table 41 is provided with an engaging portion 46 for engaging with the rail 43.
And a bulging portion 47 screwed to the screw shaft 45. Accordingly, the center of the apparatus 1 can be freely aligned with the band K according to the transport position of the band K, and the pressing width W can be adjusted more conveniently on the basis of the center.

In the apparatus 1, when the pressing width W is adjusted on the basis of one side, the driving screw shaft 27 may be a one-way screw, and the moving bracket 25 is also provided only on one side of the weight assembly 4. Formed. The lifting device 9
For example, the apparatus 1 of the present invention can be changed to various forms, for example, an appropriate lifting means can be adopted.

[0041]

Since the method of the present invention has the above-described structure, the pressing width by the weight assembly can be freely adjusted, and the application work to various belts having different widths can be performed easily and efficiently. Can do it.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the apparatus of the present invention.

FIG. 2 is a schematic side view of the device showing the operation of the lifting device.

FIG. 3 is a schematic cross-sectional view showing a state in which a band is pressed against an adhesive application roller by a pressing tool.

FIG. 4 is a schematic cross-sectional view illustrating the operation of the height aligner.

FIG. 5 is a schematic diagram illustrating a height position of a weight disc in a lowered position.

FIG. 6 is a schematic cross-sectional view illustrating an operation of adjusting a pressing width in a weight assembly.

FIG. 7 is a schematic sectional view illustrating an operation of adjusting a pressing width in a weight assembly.

FIG. 8 is a schematic cross-sectional view showing a weight aggregate in which a pressing width is adjusted.

FIG. 9 is a perspective view showing another embodiment of the frame.

FIG. 10 is a schematic cross-sectional view illustrating a conventional technique.

[Explanation of symbols]

 Reference Signs List 3 adhesive application roller 3S attachment surface 4 weight assembly 5 pressing tool 6 fork 7 moving fork tool 9 lifting / lowering tool 10 height aligning tool 19 support shaft 20 center hole 21, 21A, 21B weight disc J adhesive K band L Insertion length

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-310727 (JP, A) JP-B-59-4192 (JP, B2) JP-B-56-4310 (JP, B2) JP-B-45- 11736 (JP, B1) (58) Fields studied (Int. Cl. ⁷ , DB name) B05C 1/02 102 B05C 1/08-1/12 B05D 1/28 B29D 30/08-30/58 B29K 21: 00

Claims (4)

(57) [Claims] 1. An adhesive applying apparatus for applying an adhesive to one surface of a long strip, comprising an adhesive surface on the outer periphery of which the adhesive is adhered, and the adhesive surface being transported in a length direction. An adhesive application roller, which is perpendicular to the band body and receives the lower surface thereof, a support shaft supported by a lifting / lowering tool and rising and lowering above the adhesive application roller, and a central hole having a diameter larger than the support shaft A weight assembly having a plurality of weight disks having the same diameter and having a central hole inserted through the support shaft and being superimposed and held by the support shaft, and supported by the lifting / lowering device Is inserted from the outer end of the weight assembly whose height is aligned by the height aligner by a horizontal movement parallel to the support shaft with the support shaft to be moved, and a number of outer weights corresponding to the insertion length. Fork that locks the disc at a height higher than the height of the suspension Moving the fork member having comprising, adhesive applying apparatus characterized by pressing the upper surface of the strip body by weight discs inside that are hung on the support shaft without being locked to the fork. 2. The fork according to claim 1, wherein the fork is inserted into a gap between a center hole of the weight assembly having a uniform height and the support shaft, and at a position higher than the support shaft. Adhesive application equipment. 3. The adhesive applying apparatus according to claim 1, wherein the height aligning device is retractable forward or backward in the transport direction of the band. 4. The adhesive applying apparatus according to claim 1, wherein said forks are arranged at both ends of a weight assembly.