JPH061798Y2 - Synthetic resin plate ultrasonic automatic welding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an ultrasonic automatic welding machine that superimposes a plurality of synthetic resin plates and ultrasonically welds the edges or appropriate places in the vicinity thereof.

(Prior Art) Conventionally, as this kind of welding machine, one using an ultrasonic horn is generally widely used, and a hand type in which a welding work is carried by hand and one ultrasonic horn is placed on a table. A fixed device type is known.

And, the welding work of the plastic plate is shown in FIGS.
As illustrated in the figure, in the case of a thick plastic plate, the ultrasonic horn h is pressed against the superposition end interfaces (a) and (b) of the plastic plates P ₁ and P _{2 and} the thin plastic plate P shown in FIG. ₃ and the thick plastic plate P ₁ (or the thin plastic plate P ₃ ), the ultrasonic horn h is pressed against the peripheral portion of the surface at an appropriate position (FIG. 10). However, there is no device for continuously and automatically performing multidirectional welding.

(Problems to be solved by the invention) By the way, welding of a transparent acrylic plate or the like requires visual aesthetics, and those used for products with optical value require high welding accuracy. However, it requires a considerable amount of skill, and it is extremely difficult to satisfy the required welding precision and the like, and there are problems such as extremely inefficient.

The present invention has been made in view of the above situation,
It is an object of the present invention to provide an automatic ultrasonic welding machine for synthetic resin plates with high productivity, which is capable of automatically performing highly accurate welding with uniform welding marks and strength and without impairing aesthetics.

(Means for Solving the Problem) In the present invention, in order to achieve the above-mentioned object, the following technical means were taken.

That is, the present invention is one in which a plurality of synthetic resin plates 8 and 9 are superposed and ultrasonically welded at an edge portion or a proper position, and are opposed to each other on the machine base 1 in the X-axis direction from both sides. The left and right ultrasonic horns 12 and 13 that move forward and backward, the table 2 that reciprocates in the Y-axis direction, the upper ultrasonic horn 3738 that can move up and down in the Z-axis direction, and the welding plate pressing means 39 and 40 are mounted. A welded plate gauge plate 7 is detachably provided on the table 2.

It is preferable to provide positioning means 88, 89 for the table 2 on the machine base 1 in the Y-axis direction.

Further, it is desirable that the pressing force of the ultrasonic horns 12, 13, 37, 38 on the welded portions is given by a pneumatic (or hydraulic) cylinder or the like, and the pressing can be performed for a predetermined time.

(Operation) According to the present invention, the two synthetic resin plates 8 and 9 which are the plates to be welded
Is placed on a welded plate gauge dish 7 that fits this, the table 2 is stopped at the retracted position in the Y-axis direction, and the synthetic resin plates 8 and 9 are pressed downward by the weld pressing means 39 and 40. Fix it. Next, the left and right ultrasonic horns 12 and 13 are moved inwardly in opposition to each other in the X-axis direction to approach the superposition end interfaces (a) and (b) of the synthetic resin plates 8 and 9, and then the left and right ultrasonic horns 12 and 13 are attached. Activate it,
A predetermined pressing force is applied and the polymerization end interfaces (a) and (b) are pressed for a predetermined time to perform welding. Subsequently, the pressure applied by the welding plate pressing means 39, 40 is released, the table 2 is advanced in the Y-axis direction and stopped at a predetermined position, and the synthetic resin bodies 8, 9 are again moved downward by the pressing means 39, 40. After pressing and fixing, the left and right ultrasonic horns 12 and 13 are operated to apply a predetermined pressing force to press the polymerization end interface (a) and (b) for a predetermined time to perform welding. In this way, when the welding of the predetermined portions of the synthetic resin plates 8 and 9 is sequentially performed and completed, the table 2 is retracted and taken out from the gauge dish 7, and the welding work is completed.

When one or both of the synthetic resin plates 8 and 9 is a thin plate, after the table 2 is moved and positioned, the welding pressure means 3
Press the synthetic resin plates 8 and 9 downward with 9 and 40 to fix them.
The upper ultrasonic horns 37 and 38 are lowered, and pressure welding is performed at a predetermined pressure for a predetermined time. Then, the welding points may be sequentially positioned immediately below the ultrasonic horns 37 and 38 to perform the welding operation.

When welding three thick plates and one thin plate, the left and right ultrasonic waves 12 and 13 and the upper harmonic horns 37 and 38 are simultaneously welded.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In the drawings, reference numeral 1 denotes a machine base, which is composed of a base plate 1A having a substantially cross shape in plan view, a rectangular frame 1B made of a groove-shaped member, a support bracket 1C and a leg 1D. A rectangular table 2 is provided at the center of the base plate 1A in the left-right direction so as to be capable of reciprocating in the Y-axis direction. This table 2
A table at the center of the base plate 1A is movably supported by two sliding guide rods 4 fixed to the base plate 1A in parallel with each other in the Y-axis direction via brackets 3 via support members 5. 2 It is designed to be driven by a cylinder device 6 provided immediately below.

7 is a gauge plate to be welded, which has a size suitable for the size of each of the above synthetic plates such as acrylic plates 8 and 9 and is prepared at a predetermined position on the table 2 by a bolt 10 or the like. It is detachably attached. Reference numeral 11 is a positioning member for the welded gauge plate 7.

Reference numerals 12 and 13 are left and right ultrasonic horns, and 14 and 15 are two pairs of horn slide guides, which are parallel to each other in the X-axis direction via the support brackets 16 and 17 on the base plates 1A on both the left and right sides of the table 2. It is provided. And the ultrasonic horn 12,
The bolt 13 is mounted on the slide bases 18, 19 fitted in the horn slide guides 14, 15 by means of bolts 22 via holders 20, 21 which are divided into upper and lower halves. The holder
20 and 21 are connected and integrated by a connecting bolt 23.

24 and 25 are horn moving bodies, and horn slide guides 14 and 15
The screw spindles 26 and 27, whose bases are rotatably supported by the support brackets 16 and 17 and parallel to the slide guides 14 and 15, are provided at the end portions that are reciprocally guided and are extended to the front side. Are screwed together, and both spindles 27,
By rotating the handles 28 and 29 fixed to the base end of the 27, the horn moving bodies 24 and 25 are moved forward and backward so as to face each other in the X-axis direction.

Reference numerals 30 and 31 are left and right ultrasonic horn pressing air cylinders, the head sides of which are connected to the horn moving bodies 24 and 25 through fork-shaped metal pieces 32 and horizontal pins 33, respectively.
The outer end of each piston rod 34 of 30, 31 is a U-shaped connecting fitting.
It is fixed to the left and right outer end surfaces of the slide bases 18 and 19 via 35 and nuts 36.

37 and 38 are upper ultrasonic horns, 39 and 40 are welding plate pressing means, 41 and 42 are horn mounting columns, and the table 2 is located on the base plate 1A behind the ultrasonic horns 12 and 13 and centered on the table 2. Erected in a symmetrical position with respect to each other, and a connecting plate 43 is fixed between the upper front surfaces of both columns 41 and 42 by a bolt 44, and the connecting plates are
Supporting sliding guide rails 45 and 46 (generally called linear ways) are mounted horizontally and in parallel on the upper and lower parts of the front surface of 43.

47 and 48 are carriages, and as shown in FIG. 6 to FIG.
52, 53, 54 and upper ultrasonic horn mounting plates 55, 56 located on the opposite outer side are fixed to each other so as to have a U-shape when viewed from the front side, and bearing slide guides 57, 58 (on the back side of the substrates 49, 50). (Generally referred to as a linear guide) is provided corresponding to the guide rails 45 and 46, and the carriages 47 and 48 are cantilevered by the guide rails 45 and 46 and slidable in the X-axis direction. Has been.

Reference numeral 59 is a screw shaft, which is mounted between the columns 41 and 42 via bearings 60 and 61, in the middle of and behind the guide rails 45 and 46, and the X axis of the shaft 59. A left-hand threaded portion 59A and a right-handed threaded portion 59B are provided on the left and right from the center of the direction, and nut members 62 and 63 projecting from the back surfaces of the carriages 47 and 48 are screwed together. And, at the right end of the screw shaft 59,
The operation handle 64 is fixed, and by rotating the operation handle 64, the two reciprocations 47 and 48 are moved toward and away from each other.

Vertical sliding guide rails 65 and 66 (linear ways) are fixed to the inner surfaces of the upper ultrasonic horn mounting plates 55 and 56 facing each other, and the horns are mounted on the guide rails 65 and 66 via sliding guides 67 and 68. The holders 69 and 70 are exposed so that they can move up and down in the Z-axis direction, and the horn holders 69 and 70 have upper ultrasonic horns 37 and 38.
Is installed. The horn holders 69 and 70 are driven up and down by air cylinders 71 and 72 provided downward on the pressing means supporting plates 51 and 52, and a pressing force at the time of welding is applied. .

Reference numeral 73 is an opening provided in the moving range of the natch members 62, 63 provided on the connecting plate 43.

As shown in FIG. 6 to FIG. 8, the welding press means 39, 40 are suspension rods 74, 75 attached to upper press means supporting plates 51, 52 so as to be vertically adjustable, and the rods 74, 75. 75 Pressing air cylinders 78, 79 which are connected to the lower end via horizontal pins 76, 77 in a downward and swingable manner, and lower pressing means supporting plates 53, 54
Air cylinders 78 and 79 that extend downward through the holes
Pressing plates 82 and 83 fixed to the lower ends of the rods 80 and 81, and guide bars 84 and 85 having lower ends fixed to both sides of the pressing plates 82 and 83 and penetrating the upper and lower pressing means supporting plates 51 to 54, Pressure plate 8
It is composed of pressing contact members 86 and 87 fixed to the lower surfaces of the members 2 and 83. The pressing contact members 86, 87 are located immediately below the upper ultrasonic horns 37, 38, and the through holes (not shown) into which the horn tips are inserted are the through holes (not shown) of the pressing plates 82, 83. It is provided to match.

Reference numerals 88 and 89 denote table positioning stoppers, which are provided behind the table 2 on the base plate 1A so as to be positionally adjustable in the Y-axis supporting direction. One of the stoppers 88 is for intermediate positioning, and the slide base 90 provided on the base plate 1A is aligned with the axis of the slide base 90 in the Y-axis direction and the outer end of the rod 91 is located on the table 2 side. The air cylinder 92 provided as described above, the pushing piece 93 that penetrates the base plate 1A and is fixed to the lower surface of the slide base 90, and the tip end that is screwed to the bracket 94 that is fixed to the lower surface of the base plate 1A. It is composed of a position adjusting screw shaft 95 that abuts on the pushing piece 93 and an operating handle 96 thereof. The sliding base 90 is provided with a guide elongated hole 97 in the Y-axis direction, and a pin 98 fixed on the base plate 1A is fitted into the elongated hole 97, and the operation handle 96 is rotated to adjust the position. Move the screw shaft 95 in the Y-axis direction to
The position of the stopper 88 is determined by the tip position of the stopper.
That is, the intermediate stop position of the table 2 is determined by the position of the slide base 90 in the state where the rod 91 of the air cylinder 92 is fully advanced. After the intermediate positioning is completed, the stopper 88 is moved backward by the table 2 when the backward movement of the table 2 is started and the air in the air cylinder 92 is released.

The other table positioning stopper 89 is a bearing stand 99 that is erected on the base plate 1A, and is screwed to the bearing stand 99 and is supported by Y.
An axially movable screw shaft 100 and an operation handle 101 attached to the rear end of the screw shaft 100 are used to position the table 2 in the backward limit position.

The to-be-welded object gauge dish 7 has a rectangular shallow dish shape and is prepared in such a size that the acrylic plates 8 and 9 as the to-be-welded plates are positioned in the dish 7 and the peripheral edge 102 thereof. Notches 103 are provided at the front and rear ends and the intermediate portion on both the left and right sides of the supersonic horns 12 and 13 so as to press the superposition end interfaces (a) and (b) of the acrylic plates 8 and 9, respectively. ing. The position and number of the cutouts 103 are appropriately determined according to the size of the acrylic plates 8 and 9, the welding strength, and the like.

In the above-described embodiment, when the acrylic plates 8 and 9 are thick plates, the welding work is performed by first setting the gauge plate 7 on the table 2 according to the size of the acrylic plates 8 and 9 and then adjusting the left and right handles 2
8 and 29 are rotated to drive the horn moving bodies 24 and 25 in the X-axis direction to position the left and right ultrasonic horns 12 and 13, and the operation handle 64 is rotated to move the carriages 47 and 48 to the X-axis. Direction, and press and position according to the width of the acrylic plates 8 and 9, and further, the table positioning stopper 8
Adjust the positioning of 8 and 89. In this way, when the preparation for welding is completed, the acrylic plates 8 and 9 are set on the gauge plate 7, and the welding work of the rear ends of the acrylic plates 8 and 9 is automatically performed at the front end position of the table 2 shown in FIG. To do. First, the air cylinders 78, 79 of the welding plate pressing means 39, 40 are actuated to press and fix the acrylic plates 8, 9, and then the left and right air cylinders 30, 31 are actuated to cause the left and right ultrasonic horns 12 , 13 tips contact the superposition edge interfaces (a) and (b) of the acrylic plates 8 and 9 with a predetermined pressure, and ultrasonic waves are emitted for a predetermined time (a minute time of 1/100 second unit), so (A) and (b) are welded instantaneously at the same time. Then, air cylinders 30, 31, 7
8 and 79 are actuated, the left and right ultrasonic horns 12 and 13 are slightly retracted, the pressure of the acrylic plates 8 and 9 is released, the cylinder device 6 is actuated, and the table 2 is retracted in the Y-axis direction and It abuts the stopper 88 and stops at the intermediate position. Then, the air cylinders 78 and 79 are operated again, the acrylic plates 8 and 9 are pressed and fixed, and then the air cylinders 30 and 31 are operated to perform the welding work as described above. Welding is automatically and sequentially performed. When the welding work is completed, the table 2 is moved forwards and backwards by the cylinder device 6, so the welded acrylic plates 8 and 9 are taken out, and the next plate to be welded is set on the gauge plate 7 to carry out the above-mentioned work. Repeat.

Both acrylic plates 8 and 9 are thin plates or upper acrylic plate 8
Is a thin plate, the welding plate pressing means operates the air cylinders 78 and 79 of 39 and 40 to move the pressing plates 82 and 83 downward in the Z-axis direction, and the acrylic plates 8 and 9 press the pressing contact members 86, After 87 is pressed and fixed, the air cylinders 71 and 72 are actuated to lower the upper ultrasonic horns 37 and 38, and the tips of the horns 37 and 38 are passed through the through holes of the pressing plates 82 and 83 and the pressing contact members 86 and 87. Is an acrylic plate
8 The upper surface is pressed with a predetermined pressing force, ultrasonic waves are simultaneously emitted for a predetermined time, and welding is instantaneously performed. When the first welding is completed, the air cylinders 717278 and 79 operate,
As the ultrasonic horns 37, 38 rise, the fixation by the pressing means 39, 40 is released, the table 2 is retracted by the operation of the cylinder device 6 and stopped at the intermediate position, and then the pressing means 3
The acrylic plates 8 and 9 are pressed and fixed by 9 and 40, and the welding work is performed as described above.

If one acrylic plate is added to the acrylic plates 8 and 9 and a total of three thin plates, one thin plate and two thick plates, are welded together, after pressing the acrylic plates, the left, right, and upper parts are overlaid. Ultrasonic waves may be simultaneously emitted by the sonic horns 12, 13, 37 and 38 for welding.

The degree of welding of the plate to be welded changes depending on the force for pressing the tip of the ultrasonic horn against the plate to be welded, that is, the pressing force and time. Therefore, since the selection of the welding time determines the quality of the welding surface, it is preferable to adjust the time in minute time of about 1/100 second.

Further, it is preferable that the pressing force of the ultrasonic horn be controlled so that it can be finely adjusted, and that the sliding guide and the guide rail be selected with a mechanism that slides smoothly with good accuracy.

In the above embodiment, no ultrasonic horn is provided in the Y-axis direction, but if necessary, ultrasonic horns may be arranged in front of and behind the table 2 so that the front and rear end faces can also be welded. it can.

The present invention is not limited to the above embodiment, and it goes without saying that the design can be changed appropriately.

(Effects of the Invention) As described above, the ultrasonic automatic welding machine according to the present invention is one in which a plurality of synthetic resin plates 8 and 9 are superposed and ultrasonically welded at an edge portion or a proper position. X on machine stand 1
Left and right ultrasonic horns that move axially oppositely from both sides 1
2.13, the table 2 that reciprocates in the Y-axis direction, the upper ultrasonic horns 37 and 38 that can move up and down in the Z-axis direction, and the welding and pressing means 39 and 40 are mounted on the table 2. Since the welding plate gauge plate 7 is detachably provided, the synthetic resin plate can be continuously polymerized and welded automatically, and the synthetic resin plate can be welded plate gauge plate 7
Since it is accurately polymerized and there is no step at the polymerization end interface to reduce the welding force, the welding precision is good and the welding trace and strength can be made uniform,
There is no fear of deteriorating the aesthetics of the welding trace and reducing the optical value, and the welding work can be performed efficiently without requiring skill, and the quality and productivity can be improved.

[Brief description of drawings]

1 to 8 show an embodiment of the present invention.
The figure is an overall plan view, and FIG. 2 is a right side view with a part of FIG. 1 omitted.
3 is an enlarged plan view of a part of the table and the right ultrasonic horn driver, FIG. 4 is a sectional view taken along the line AA of FIG. 3, and FIG. 5 is a sectional view taken along the line BB of FIG. 6 is an enlarged front view of the upper ultrasonic horn and the welding plate pressing means, FIG. 7 is a plan view of FIG. 6, FIG. 8 is an enlarged plan view taken along the line CC of FIG. 6, and FIG. And FIG. 10 is an explanatory view of the work of polymer resin welding. 1 ... Machine stand, 2 ... Table, 7 ... Welding gauge dish, 8, 9 ... Synthetic resin plate, 12, 13 ... Left and right ultrasonic horns, 37, 38 ... Upper ultrasonic horn, 39, 40 ... Welding plate pressing Means, 88, 89 ... Positioning means (stopper).

Claims (3)

[Scope of utility model registration request] 1. A plurality of synthetic resin plates (8) and (9) are superposed and ultrasonically welded at an edge portion or a proper position, and both sides of the machine base (1) in the X-axis direction. Left and right ultrasonic horns (12) and (13) facing each other, a table (2) that reciprocates in the Y-axis direction, an upper ultrasonic horn (37) (38) that can move up and down in the Z-axis direction, and a cover. Welding plate pressing means (39) (40) is mounted, and the welding plate gauge pan (7) is detachably provided on the table (2). Welding machine. 2. A synthetic resin plate ultrasonic automatic welding machine according to claim 1, wherein Y-axis direction positioning means (88) (89) for the table (2) are provided on the machine base (1). 3. An upper ultrasonic horn (3
7) (38) and the welded plate pressing means (39) (40) are symmetrical,
The synthetic resin plate ultrasonic automatic welding machine according to claim 1 or 2, wherein each pair is movable in the Y-axis direction.