JP5764664B2 - Hot air hot melt tape welding equipment - Google Patents

Description

  The present invention relates to an improvement of a hot-air hot melt tape welding apparatus, and more specifically, swing control of one support arm of a support roller that supports the hot melt tape in accordance with the shape of a sticking location. It is.

  The hot air hot melt tape welding apparatus melts the hot melt layer by blowing hot air heated to a high temperature (about 200 ° C. to 600 ° C.) using an electric heater on the back surface of the hot melt tape, and applies it to the object. The melting surface is brought into contact with each other, pressure bonding is performed at a contact point between a pair of rollers, and the object and the hot melt tape are welded.

  There are several reasons for applying the hot melt tape, but it is often used as a seal (sealing) for the purpose of water stoppage. For example, in the case of a shoe as an object, the hot melt tape is formed by cutting a waterproof sheet into an inner boot shape provided along the inner surface of the shoe body, and then sewing these cut pieces. It is formed into a shoe shape, and is disposed so as to cover this stitched portion (needle portion) and welded. (See Patent Document 1 and Patent Document 2)

JP-A-9-149804 JP 2005-46472 A

  It is important to keep the hot melt tape (hereinafter simply referred to as the tape) flat when crimping, and if the tape is not flat, it will be wrinkled and folded. When crimping is performed in a state where wrinkles and folds are generated, it is welded with the wrinkles and folds remaining, so that sufficient waterproofness cannot be maintained.

  When the tape is welded so as to cover the stitched portion, the material constituting the inner boot and the tape arranged along the stitched portion are passed between a pair of rollers and heated by heating means such as hot air. A tape having the melt layer melted is pressed against the material. Conventionally, one of the pair of rollers has been installed on a fixed arm having a certain angle.

Therefore, as in the process diagram shown in FIG. 3, the object had come into contact with the fixed arm in some attitude. When the object comes into contact with the fixed arm, wrinkles are generated at the contact point. When wrinkles occur in the vicinity of the crimping portion, the wrinkles are transmitted to the crimping portion, so that it is very difficult to weld the tape without wrinkles.

  The present invention has been proposed in view of the above points, and the object of the present invention is that even if the object comes into contact with the fixed arm of the roller, wrinkles generated by the contact are generated in the crimping portion. There is no influence, and the work of welding the tape in a wrinkle-free state can be easily performed.

The present invention comprises a hot-air type hot roller comprising a pair of pressure-bonding rollers that sandwich a workpiece and a hot-air nozzle that blows hot air toward a hot-melt layer of a hot-melt tape supplied between opposing rolling surfaces of the roller. A melt tape welding apparatus,
A substantially U-shaped support arm that rotatably supports one of the pair of press rollers is configured to be swingable within a certain angle range, and is supported by the swing center axis of the support arm and the support arm. The rotation center shaft of the pressure roller is configured to be concentric.

  In this case, the pair of pressure rollers and the support arm are preferably driven by drive motors that operate independently.

  In the present invention, the supporting arm that supports one of the pair of pressure rollers is configured to be swingable about an axis that is coaxial with the rotation axis of the roller. When the tape and the tape are mounted between a pair of pressure rollers and the tape is fused to the workpiece, the contact between the workpiece and the support arm is suppressed by temporarily changing the orientation of the workpiece, and temporarily contacted. Even if it happens, the contact point can be located away from the crimping part, and the wrinkles generated by contact will not affect the crimping part, and the tape will be welded without wrinkles. Can do.

It is a schematic structure figure showing one embodiment of the hot air type hot melt tape welding device concerning the present invention. It is an action | operation figure of the principal part which shows the operation | work procedure with the apparatus which concerns on this invention. It is an action | operation figure of the principal part which shows the conventional work procedure.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described in more detail with reference to the drawings specifically shown as follows.

  This hot-air hot melt tape welding apparatus includes a lifting shaft (2) supported so as to be movable up and down on a base (1), and an upper pressure bonding supported rotatably on a lower end portion of the lifting shaft (2). A roller (3) and a lower crimp supported rotatably on one leg upper end of a substantially U-shaped support arm (4) supported so as to be swingable around a horizontal axis on the base (1). It comprises a roller (5) and a hot air nozzle (7) in which an ejection port (6) is arranged in the vicinity of the pressure contact rolling surface of the upper and lower pressure-bonding rollers (3) and (5).

  The oscillation center axis (8) of the substantially U-shaped support arm (4) and the rotation pivot axis (9) of the lower press roller (5) are located on the same horizontal axis. Therefore, the lower pressure roller (5) rotates without changing the relative position with the base (1), and only the support arm (4) swings within a certain angle range.

  The substantially U-shaped support arm (4) includes an intermediate rotation transmission shaft (10), one end of the intermediate rotation transmission shaft (10), and a rotation pivot shaft (9) of the lower pressure roller (5). Between the other end of the belt transmission mechanism (11) and the intermediate rotation transmission shaft (10) and the rotation drive shaft (12) arranged to be rotatable relative to the base (1). And a drive side belt transmission mechanism (13) attached to the vehicle.

  The rotary drive shaft (12) passes through the inside of the swing center shaft (8) that supports the support arm (4) so as to be swingable with respect to the base (1). ) And the oscillation center shaft (8) are rotated independently.

  The swing center shaft (8) is a stepping motor (15) via a gear transmission mechanism (14), and the rotation drive shaft (12) is a rotation drive motor (17) via a chain transmission mechanism (16). In this way, each is independently driven to rotate.

  The upper pressure roller (3) is configured such that the distance between the upper roller (3) and the lower pressure roller (5) can be adjusted by moving the lifting shaft (2) back and forth with the air cylinder (18). The upper pressure roller (3) is linked to an electric motor (19) disposed on the base (1) via a chain transmission mechanism (20).

  The hot air nozzle (7) is configured so that the nozzle cylinder body (21) with an electric heater inside can be adjusted and changed by the nozzle moving air cylinder (22). It is.

The stepping motor (15), the rotation drive motor (17), the electric motor (19), the air cylinder (18) for driving the upper pressure roller (3) to move up and down, and the nozzle moving air cylinder for driving the nozzle cylinder body (21) (22) is individually controlled in accordance with a program incorporated in a control device (not shown). At this time, the upper and lower press rollers (3) and (5) are arranged so that the rotation speed of the lower rotation roller (5) automatically changes at a constant ratio based on the rotation speed of the upper rotation roller (3). The rotational speed of the motors (17) and (19) is controlled.
Further, the swing control of the support arm (4) is performed on the basis of the shape of the workpiece within a predetermined range of swing angles (for example, ± 70 degrees) with the vertical posture of the support arm being 0 degrees. The rocking angle is determined using the movement distance from the welding start point at the parameter as a parameter, and the rocking speed is controlled based on the rotating speed of the upper rotating roller (3).

Using hot air hot melt tape welding apparatus comprising a configuration described above, operating on the basis of FIG. 2 illustrating the case of welding a hot melt tape sewn portion of the inner boot.

  The lower pressure roller (5) is positioned inside the opening portion of the inner boot, which is the workpiece (W), and the hot melt layer is melted on the outer portion of the workpiece (W) (T ) And the upper pressure roller (3), and the tape (T) and the workpiece (W) are sandwiched between the upper and lower pressure rollers (3) and (5) with both rollers (3) and (5). Is moved while the tape (T) is welded to the workpiece (W).

 Then, the support arm (4) of the lower pressure roller (5) is swung according to the movement of the workpiece (W). The swinging of the support arm (4) also inevitably causes the support arm (4) and the workpiece (W) to come into contact with each other, but the upper and lower rollers (3) ( 5), the wrinkles generated on the workpiece (W) due to the contact between the support arm (4) and the workpiece (W) are welded to the tape (T). It is possible to weld the tape (T) exactly along the surface of the workpiece (W).

  The swing angle of the support arm (4) disclosed in the present invention has an in-curve and an out-curve such as shoes and a bag by registering an operation pattern in advance in a control device (not shown) according to the object to be processed. It is possible to deal with a workpiece having a shape.

  3 · 5 ··· Pressure roller (3 ··············································································· Rotating pivot shaft of pressure roller, 15, 17, 19 ... drive motor (15 ... stepping motor, 17 ... rotary drive motor, 19 ... electric motor), W ... workpiece, T ... hot melt tape.

Claims (4)

On the hot melt layer of the hot melt tape (T) supplied between the pair of pressure rollers (3) and (5) that sandwich the workpiece (W) and the opposing rolling surfaces of the rollers (3) and (5). A hot air hot melt tape welding apparatus having a hot air nozzle (7) for blowing hot air toward the
A substantially U-shaped support arm (4) that rotatably supports one of the pair of pressure rollers (3) and (5) is configured to be swingable within a certain angle range, and this support arm The hot air characterized in that the rocking center shaft (8) of (4) and the rotary pivot shaft (9) of the pressure roller (5) supported by the support arm (4) are concentric. Hot melt tape welding equipment.   The hot-air hot melt tape welding apparatus according to claim 1, wherein the other pressure roller (3) of the pair of pressure rollers (3) and (5) is configured to be linearly retractable.   3. The hot-air hot according to claim 1, wherein the pair of pressure rollers (3), (5) and the support arm (4) are driven by independent drive motors (19), (17), (15), respectively. Melt tape welding equipment. The pair of pressure rollers (3) and (5) controls the rotation speed of the pressure roller (5) facing each other at a constant ratio with respect to the rotation speed of the pressure roller (3) that moves straight out, and supports the support arm. The hot air hot melt tape welding apparatus according to any one of claims 1 to 3, wherein the swinging speed of (4) is controlled based on the rotational speed reference of the pressure roller (3) that moves straightly back and forth.

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