JP5733793B2 - Manufacturing method of welded resin products - Google Patents

Description

In the present invention, a pair of workpieces are separately held on a pair of workpiece support boards, the opposing surfaces of the workpieces are heated, and then the opposing surfaces of the workpieces are welded by bringing the pair of workpiece support plates closer to each other. It relates to the production how to produce a welded resin product using the heat welding apparatus.

  Conventionally, as this type of heat welding apparatus, there is also known an apparatus provided with an adsorption part on one of a pair of work support boards, and the work is adsorbed to the adsorption part by negative pressure and held on the work support board (for example, , See Patent Document 1).

Japanese Patent Laid-Open No. 9-11333 (see paragraphs [0016] in FIGS. 1 and 6)

  By the way, in the heat welding apparatus, when the work is pressed against the heating plate in order to melt the facing surfaces of the works, the work and the heating plate are bonded to each other, and a reaction force when separating the work from the heating plate (hereinafter, appropriately, "Separation reaction force") acts between the workpiece support board. However, in the suction part provided on the work support board of the above-described conventional heat welding apparatus, air leaks between the work and the suction part, so that sufficient holding force cannot be obtained, and the work comes off from the work support board. As a result, there has been a problem that the welding position of the workpieces is shifted and the welding quality is not stable.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a manufacturing how the welding resin product which can stabilize the welding quality.

The manufacturing method of the welded resin product according to the invention of claim 1 made to achieve the above object is to separate and hold a pair of workpieces separately by a pair of approaching and separating workpiece support boards, A welded resin product obtained by welding a pair of workpieces using a heat welding apparatus that welds the opposing surfaces of the workpieces by heating the opposed surfaces of the workpieces and then bringing a pair of workpiece support plates closer to each other. In the method for manufacturing a welded resin product, the heat receiving apparatus is provided with a packing receiving groove formed in a work placement surface opposite to the work of the work support board, and a packing receiving groove that is received in the packing receiving groove. Elastomer packing with a part protruding, and formed through each work support board, one end opens to the area surrounded by packing on the work placement surface, the other end is negative pressure inside the packing An intake path connected to the inlet means for the state provided, sandwiched between a pair of workpiece support plate by a pair of workpiece joined state, can be adsorbed onto the workpiece support plate, their pair After separating the workpieces together with the workpiece support board, letting the heating plate enter between them, pressing the opposed surfaces of the workpieces against the heating plate, separating the workpieces and retracting the heating plate, then facing the workpieces The heat welding apparatus is configured to press and weld the surfaces, and a pair of workpieces are provided with positioning fitting portions that are fitted to each other when the workpieces are joined, It is characterized in that an escape hole for avoiding interference with the positioning fitting portion is formed so as to penetrate or the positioning fitting portion is pressed against the heating plate and crushed .

The invention of claim 2 is characterized in that, in the method of manufacturing a welded resin product according to claim 1, the packing is compressible and deformable until it is crushed by the work and becomes flush with the work placement surface.

According to a third aspect of the present invention, in the method for manufacturing a welded resin product according to the first or second aspect, an intake groove is formed in a region of the work placement surface surrounded by the packing, and an intake passage is formed on the inner surface of the intake groove. It is characterized in that one end is left open.

According to a fourth aspect of the present invention, in the method for manufacturing a welded resin product according to any one of the first to third aspects, the pair of workpieces is a component part of a box pallet, a container, or other conveying device. The hollow resin plate is divided into two in the thickness direction, and the packing receiving groove is divided into an annular outer groove along the outer edge of the work and a region surrounded by the outer groove into a plurality of partition regions. constituted by a groove, surrounding the respective defined areas in the packing, which is received in the packing receiving groove, characterized in where allowed to open one end of the intake passage into a plurality of divided areas.

According to a fifth aspect of the present invention, in the method for manufacturing a welded resin product according to any one of the first to fourth aspects, the positioning fitting portion is opposed in a first direction orthogonal to the joining direction of the workpieces. It is characterized in that the pair of first opposing protruding walls face each other in a second direction orthogonal to both the joining direction and the first direction.

[Inventions of Claims 1 and 5 ]
In the manufacturing method of the welded resin product according to claim 1, since the inside of the elastomer packing provided on the work support plate is in a negative pressure state and the work is held in close contact with the packing, air leakage which has been a problem in the past Is suppressed, the work holding force is higher than before, and the welding position between the works is stabilized. As a result, it is possible to manufacture a welded resin part having a stable weld quality compared to the conventional one.
Further, in the present invention, since a positioning fitting portion is provided to be fitted to each other when a pair of workpieces are joined before welding, it is easy to join the workpieces and set them in the heat welding apparatus. In addition, the workpieces may be positioned in only one direction by the positioning fitting portion, or as in the invention of claim 5, the pair of first opposing protruding walls and the pair that are fitted with the protruding protrusion. The second opposing protruding walls may be provided, and the workpieces may be positioned two-dimensionally by changing the positioning directions of the first opposing protruding wall and the second opposing protruding wall.

[Invention of claim 2]
In the method for manufacturing a welded resin product according to claim 2, the packing is crushed by the workpiece to be flush with the workpiece placement surface, and the welded portion between the workpieces is crushed in a state where the workpiece is in contact with the workpiece placement surface. Since it can do, the amount of crushing becomes difficult to be influenced by the amount of elastic deformation of packing. Also in this point, the welding quality is stabilized.

[Invention of claim 3]
The intake passage formed through the work support board so as to make the inside of the packing have a negative pressure state may be simply opened at one end to a region surrounded by the packing on the work placement surface. As described above, an air intake groove may be formed in an area surrounded by the packing on the workpiece arrangement surface, and one end of the air intake path may be opened on the inner surface of the air intake groove. With this configuration, it is possible to increase the holding force of the work by widening the negative pressure receiving area of the work.

[Invention of claim 4]
When the pair of workpieces has a structure in which the hollow resin plate is divided into two in the thickness direction, the packing receiving groove is formed in an annular shape along the outer edge of the workpiece as in the method for manufacturing a welded resin product according to claim 4. When the groove and the partition groove that divides the region surrounded by the outer groove into a plurality of partition regions are formed and the packing is received in the packing receiving groove, the packing can be brought into close contact with a wide range of the workpiece. And a negative pressure can be applied to the substantially whole workpiece | work by making one end of an intake passage open | release to the some division area enclosed with packing. Thereby, holding | maintenance of a workpiece | work is stabilized.

The perspective view of the box pallet which concerns on one Embodiment of this invention A perspective view of the box pallet with one second pallet side wall removed. Perspective view of folded box pallet The perspective view of the outer surface side of the 1st pallet side wall Partially broken perspective view of the box pallet in a state where the upward engagement hook and the downward engagement hook are engaged. (A) Perspective view of coupling slider arranged on one end side of slider receiving portion, (B) Perspective view of coupling slider arranged on the other end side of slider receiving portion. Perspective view of inner surface side of second pallet side wall The perspective view of the inner surface side of the outer side configuration panel and the inner side configuration panel of the first pallet side wall Partially broken perspective view of first pallet side wall (A) Perspective view of longitudinal direction positioning part and positioning fitting projection, (B) Perspective view of lateral positioning part and positioning fitting projection (A) Inner surface side perspective view of outer configuration panel of second pallet side wall, (B) Inner surface side perspective view of inner configuration panel of second pallet side wall Front view of heat welding equipment Sectional drawing of the heat welding apparatus in the AA cross section of FIG. Flat cross-sectional view of the heat welding device while the heating plate slides Sectional drawing of the heat welding apparatus in the BB cross section of FIG. Front sectional view of the heating plate support mechanism Top view of lower work support board (A) Side sectional view of the lower workpiece support board in the CC section of FIG. 17, (B) Side sectional view of the lower workpiece support board after holding the workpiece, (A) Partially enlarged side sectional view of the lower workpiece support board before holding the workpiece, (B) Partially enlarged side sectional view of the lower workpiece support board after holding the workpiece. (A) Cross section of packing before holding workpiece, (B) Cross section of packing after holding workpiece Bottom view of upper work support board (A) Side sectional view of the upper workpiece support board in the DD section of FIG. 21, (B) Side sectional view of the upper workpiece support board after holding the workpiece, (A) Partially enlarged side sectional view of the upper workpiece support board before holding the workpiece, (B) Partially enlarged side sectional view of the upper workpiece support board after holding the workpiece. (A) Front view of heating welding apparatus when setting workpiece, (B) Front view of heating welding apparatus in a state where the workpiece is sandwiched between workpiece support boards (A) Front view of the heat welding apparatus in a state where the work is pressed against the heating plate, (B) Front view of the heat welding apparatus in a state where the work is pressed against each other. (A) Cross-sectional view with workpieces in contact with heating plate, (B) Cross-sectional view with workpieces pressed against heating plate, (C) Cross-sectional view with workpieces in contact with each other

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a box pallet 10 having first and second pallet side walls 20 and 40 corresponding to the “welded resin product” and “hollow resin plate” of the present invention assembled to a pallet body 11. Yes. Specifically, as shown in FIG. 2, a pair of rotation support portions 15 </ b> A and 15 </ b> A project from a pair of opposite side portions on the outer edge portion of the upper surface of the pallet main body 11, and the remaining one pair A pair of insertion support portions 15B and 15B that are higher than the rotation support portion 15A are formed so as to protrude from the opposite side portions. The pair of first pallet side walls 20 and 20 are rotatably assembled to the pair of rotation support portions 15A and 15A, and the pair of second pallet side walls 40 and 40 is a pair of insertion support portions. It is assembled | attached to 15B and 15B so that rotation is impossible. The box pallet 10 is shown in FIG. 3 by laying a pair of first pallet side walls 20, 20 on the pallet body 11 and laying a pair of second pallet side walls 40, 40 on them. Thus, it can be folded.

  Unless otherwise specified in the following description, the “outer surface of the first pallet side wall 20” does not indicate an outer surface with respect to the inner surface of the hollow structure of the first pallet side wall 20 but is the first of the box pallets 10. The surface outside the luggage storage space surrounded by the first and second pallet side walls 20 and 40 is indicated, and the “inner surface of the first pallet side wall 20” indicates the inner surface facing the luggage storage space. And The same applies to the second pallet side wall 40.

  As shown in FIG. 4, the first pallet side wall 20 is a horizontally long rectangle, and includes a plurality of hinge protrusions 21 on the lower surface. In addition, a handle portion 23 is formed in the center of the outer surface of the first pallet side wall 20, and rectangular outer surface recessed portions 24, 24 in which the outer surface of the first pallet side wall 20 is slightly depressed are formed on both sides thereof. Has been.

  The first pallet side wall 20 is formed with side step recesses 25, 25 by recessing both side edges of the outer surface with a constant width. A plurality of upward engagement hooks 26 </ b> C are arranged in the vertical direction in each side step recess 25. In addition, slider receiving portions 28 are formed in depressions at positions near the upper corners of the first pallet side wall 20, and the coupling slider 27 is received there. As shown in FIG. 6A, each slider receiving portion 28 has a substantially rectangular outer surface opening 28 </ b> B on the outer surface of the first pallet side wall 20 and communicates with the step surface 25 </ b> A of the side step recess 25. It has. On the other hand, the coupling slider 27 has a structure in which the projecting piece 27B projects from the operating portion 27A that can move directly in the outer surface opening 28B toward the guide hole 28D. Then, as shown in FIGS. 6 (A) and 6 (B), the intrusion piece 27B is switched between a state protruding from the step surface 25A and a state retracted in the guide hole 28D.

  As shown in FIG. 2, the second pallet side wall 40 has a horizontally long rectangle as a whole and includes a plurality of insertion protrusions 41 on the lower surface. And the 2nd pallet side wall 40 is hold | maintained in the standing state by inserting the insertion protrusion 41 in the receiving recessed part 17A (refer FIG. 1) with which the insertion support part 15B of the pallet main body 11 was equipped. The receiving recess 17A is also open on the inner surface of the insertion support 15B (see FIG. 3), and receives the insertion protrusion 41 even when the second pallet side wall 40 is laid down.

  As shown in FIG. 1, an outer surface lower end handle portion 46 is recessed in the center of the lower end portion on the outer surface of the second pallet side wall 40, and a pair of outer surface upper end handle recess portions 45, 45 are formed on the upper edge portion. A pair of inner surface upper-end hand-clamping recesses 48 are formed on the back side thereof. Outer surfaces of the second pallet side wall 40 are provided with outer surface recesses 47 and 47 that are slightly recessed from the outer surface of the second pallet side wall 40 on both sides of the outer surface lower end handle 46.

  As shown in FIG. 7, side cover walls 51, 51 are formed on the inner surface of the second pallet side wall 40 so as to protrude from both outer edges, and an inner corner between the side cover wall 51 and the second pallet side wall 40. A plurality of downward engagement hooks 53 are provided side by side. And as shown in FIG. 5, it engages with the downward engagement hook 53 and the upward engagement hook 26C. An engagement recess 54 is provided between the upper two downward engagement hooks 53, 53, and the engagement protrusion 27 B of the coupling slider 27 enters the engagement recess 54.

  The above-mentioned first pallet side wall 20 is formed by heat-welding the outer component board 31 and the inner component board 35 shown in FIG. 8, and the second pallet side wall 40 is formed as shown in FIGS. 11 (A) and 11 (B). The illustrated outer component board 61 and inner component board 65 are heat-welded.

  Specifically, as shown in FIG. 9, the first pallet side wall 20 includes an outer main plate 32 and an inner main plate 36 that face each other with the sealed space 20 </ b> P interposed therebetween. In addition, a resin fixing layer 20K is provided between the outer main plate 32 and the inner main plate 36 along a surface that divides the entire first pallet side wall 20 into two in the thickness direction. The fixing layer 20 </ b> K is disposed near the inner main plate 36 in the thickness direction of the first pallet side wall 20. Further, the outer main plate 32 side of the first pallet side wall 20 from the fixed layer 20K is the outer component plate 31, and the inner main plate 36 side of the first pallet side wall 20 from the fixed layer 20K is the inner component plate 35. Yes.

  As shown in FIG. 8, the outer component board 31 has a structure in which lattice-like ribs 33 are stretched around the entire surface of the outer main plate 32 facing the inner main plate 36. Similarly, the inner component board 35 has a structure in which lattice-like ribs 37 are stretched around the inner main plate 36. And the front-end | tip part of the rib 33 of the outer side construction board 31 and the rib 37 of the inner side construction board 35 is welded, the outer side main board 32 and the inner side main board 36 are connected by these ribs 33 and 37, and 1st. A sealed space 20P in the pallet side wall 20 is partitioned into a plurality of cells (small rooms).

  By the way, the outer component board 31 and the inner component board 35 are set in the heat welding apparatus 75 mentioned later in the state joined mutually so that it may explain in full detail later (refer FIG. 24 (A)). In order to position the outer component board 31 and the inner component board 35 with each other in the joined state, the outer component board 31 is provided with a lateral position determining portion 71 and a vertical position determining portion 72 as shown in FIG. The inner component board 35 is provided with a rushing protrusion 73 according to the present invention.

  The lateral position determining portion 71 is for positioning and fixing the outer component board 31 and the inner component board 35 to each other in the horizontal direction. Are arranged at two positions, a position closer to the upper end and a position closer to the lower end. On the other hand, the vertical position determining unit 72 is for positioning and fixing the outer component board 31 and the inner component board 35 to each other in the vertical direction. It is arrange | positioned in two positions of the both ends of the left-right direction in the center. And the rushing protrusion 73 is arrange | positioned in the inner main body board 36 in the opposing position with each horizontal direction position determination part 71 and each vertical direction position determination part 72. FIG.

  FIG. 10 shows the lateral position determining portion 71, the longitudinal position determining portion 72, and the rush protrusion 73 in a state before the outer structure plate 31 and the inner structure plate 35 are fixed. As shown in FIG. 10 (A), the vertical position determining portion 72 includes a pair of opposing pieces 72A and 72A that face each other in the vertical direction of the outer component board 31 from the back side of the opposing surfaces. , 72B. Further, as shown in FIG. 10 (B), the lateral position determining unit 71 has a shape obtained by rotating the vertical direction determining unit 72 by 90 degrees, and is a pair of opposing surfaces facing each other in the lateral direction of the outer component board 31. The pieces 71A and 71A are reinforced with reinforcing triangular ribs 71B and 71B. In the present embodiment, either one of the pair of opposing pieces 71A, 71A and the opposing pieces 72A, 72A corresponds to the “one pair of first opposing protruding walls” according to the present invention, while the other is “one pair” Corresponds to the “second opposing protruding wall”.

  On the other hand, the intrusion protrusion 73 has a “+” shape in cross section, and the first intrusion piece 73A whose thickness direction faces the vertical direction of the outer component board 31 and the second intrusion whose thickness direction faces the lateral direction. It has a structure in which the piece 73B intersects with each other at the center in the width direction. Further, both corners of the tips of the first and second entry pieces 73A and 73B are chamfered.

  In a state before the outer component board 31 and the inner component board 35 are fixed, the lateral position determining portion 71 and the vertical position determining portion 72 described above are higher than the rib 33, and the entry protrusion 73 is higher than the rib 37. It has become. Then, when the outer component board 31 and the inner component board 35 before being fixed to the pair of opposed jigs are joined to each other, the protruding protrusion 73 is formed between the opposed pieces 72A and 72A of the longitudinal position determining unit 72. The outer component board 31 and the inner component board 35 are positioned in the vertical direction by fitting, and the protrusion 73 is fitted between the opposing pieces 71A, 71A of the lateral position determining unit 71, and the outer board 31 and the inner component board 35 are positioned in the lateral direction. And the horizontal position determination part 71, the vertical direction position determination part 72, and the intrusion protrusion 73 are the heating plate mentioned later, after the outer side configuration board 31 and the inner side configuration board 35 are fixed to a pair of opposing jigs. It is pressed against 80 (see FIG. 26 (A)), the tip is melted, and it is lowered to a height equivalent to the rib 33 or the rib 37.

  In addition, if the escape hole corresponding to the horizontal position determination part 71, the vertical direction position determination part 72, and the protrusion protrusion 73 is provided in the iron plate of heat welding, a horizontal direction determination part in the state by which the front-end | tip is not melt | dissolved. 71, the vertical positioning portion 72 and the rushing protrusion 73 can be left in the first pallet side wall 20.

  The description regarding the structure of the outer component board 31 and the inner component board 35 which comprises the 1st pallet side wall 20 is above. In addition, about the outer side configuration board 61 and the inner side construction board 65 which comprise the 2nd pallet side wall 40, since it is the structure similar to the outer side construction board 31 and the inner side construction board 35, description is abbreviate | omitted.

  Now, FIG. 12 shows a heat welding device 75 for manufacturing the first pallet side wall 20 by heat welding the outer component board 31 and the inner component board 35 described above. The heat welding apparatus 75 includes a pair of work support plates 91 and 95 according to the present invention arranged vertically opposite to each other. For example, only the upper work support plate 95 moves up and down. For this purpose, the heat welding device 75 includes an elevating base 78 supported by the support frame 76F so as to be movable up and down. As shown in FIG. 13, the support frame 76 </ b> F has struts 76 </ b> C extending upward from the four corners of the fixed base 76 </ b> A having a substantially quadrangular planar shape, and as shown in FIG. It has a structure. The lower work support board 91 is fixed to the upper surface 76J of the fixed base 76A.

  As shown in FIG. 15, the gantry portion 76 </ b> B has a substantially rectangular shape as viewed from the bottom, similar to the fixed base 76 </ b> A, and the columns 76 </ b> C are fixed to the four corners. Further, as shown in FIG. 12, a plurality of support plate drive cylinders 77 are assembled to the gantry 76B from above. The rods 77R of the support plate drive cylinders 77 extend vertically downward from the lower surface of the gantry part 76B through a through hole (not shown) penetrating the gantry part 76B up and down, and the lower ends of the rods 77R group are connected to the lifting base 78 described above. It is fixed. Then, the upper work support plate 95 is fixed to the lower surface 78J of the lift base 78, faces the lower work support plate 91, and the lift base 78 is driven up and down by the support plate drive cylinder 77 group. Both work support boards 91 and 95 approach and separate.

  The work support boards 91 and 95 are both formed into a rectangular plate shape, and the above-described outer component board 31 (see FIG. 8) is held by the lower work support board 91 as a “work” according to the present invention. On the other hand, the inner component board 35 (see FIG. 8) is held by the upper work support board 95 as a “workpiece” according to the present invention. Details of the work support boards 91 and 95 will be described later.

  In order to heat the joining surfaces (welding surfaces) of the outer component plate 31 and the inner component plate 35 held by the work support plates 91 and 95, the heating welding device 75 is provided with a heating plate 80 shown in FIG. ing. The heating plate 80 has a rectangular flat plate shape, and its outer edge is supported by a heating plate support frame 84 (see FIG. 16). The heating plate support frame 84 is supported by the slide base 81 so as to be movable up and down, and the slide base 81 is slidable on both sides by a pair of guide rails 79 extending in parallel with the horizontal direction. It is supported.

  Specifically, one guide rail 79 is routed between a pair of left columns 76C and 76C in FIG. 13, while the other guide rail 79 is a pair of columns 76C and 76C on the right side in FIG. It is handed over between. These guide rails 79, 79 are arranged at the same height, extend in parallel, and extend to the rear position of the fixed base 76A. Further, portions of the guide rails 79, 79 that are extended rearward from the fixed base 76A are supported by a support base 79A. Moreover, as shown in FIG. 16, the guide rails 79 and 79 are formed in a groove shape, and the openings of the grooves are provided on the sides facing each other.

  As shown in FIG. 13, the slide base 81 includes, for example, a pair of side support portions 81 </ b> A and 81 </ b> A extending horizontally adjacent to the opposing surfaces of the guide rails 79 and 79, and the side support portions. The rear end portions 81A and 81A (the end portion on the side away from the fixed base 76A) are connected to each other by the rear end connecting portion 81B. In addition, the support shafts of a plurality of rollers 81K (see FIG. 16) engaged in the guide rails 79 and 79 are fixed to the both side support portions 81A and 81A. Further, as shown in FIG. 13, a slit 81C is formed in the longitudinal direction of the rear end connecting portion 81B, and the tip of the turning lever 83R is slidably engaged with the slit 81C. The turning lever 83R is driven to turn horizontally by the turning drive source 83, so that the slide base 81 linearly moves along the guide rail 79 in the horizontal direction as shown in the change between FIG. 13 and FIG. .

  As shown in FIG. 13, a drive cylinder 82 is attached to each of two locations (a total of four locations) of each side support portion 81A, 81A. As shown in FIG. 16, the rod 82R of each drive cylinder 82 is connected to the side. Extending downward from the support portion 81 </ b> A, their lower end portions are fixed to the four corners of the heating plate support frame 84. As a result, the heating plate 80 moves up and down with respect to the slide base 81 together with the heating plate support frame 84.

  As shown in FIG. 16, the heating plate support frame 84 includes a frame plate 84A that supports the outer edge portion of the heating plate 80 from below, and an outer edge side wall 84B that stands up from the entire outer edge portion of the heating plate support frame 84. Is provided. Further, the angle wall 84C is erected from the positions near the left and right inner edges on the upper surface of the frame plate 84A, and the upper end portion thereof is bent at right angles to the inside. And the outer edge part of the heating plate 80 is pinched | interposed from the up-down direction between the inner edge part of the frame board 84A, and the horizontal part of the upper end in the angle wall 84C. A clearance 84F is provided between the angle wall 84C and the upper surface of the heating plate 80, and the heating plate 80 can move up and down with respect to the heating plate support frame 84 within the range of the clearance 84F. Furthermore, a stopper wall 84D for preventing the heating plate 80 from shifting back and forth with respect to the heating plate support frame 84 protrudes from the positions near the front and rear inner edges on the upper surface of the frame plate 84A (FIG. 26). (See (A))

  As shown in FIG. 13, a pair of clamping blocks 84T, 84T protrudes outward from both ends of the slide movable direction (vertical direction in FIG. 13) on the heating plate support frame 84. With respect to these sandwiching blocks 84T, contact struts 91T project from the upper four corners of the lower work support board 91, and contact struts 95T project from the lower four corners of the upper work support board 95 as shown in FIG. ing. These contact struts 91T and 95T are both cylindrical. Further, as shown in FIG. 26C, a positioning recess 91T1 is formed in the center of the end surface of the lower contact column 91T, while a positioning protrusion is formed from the center of the end surface of the upper contact column 95T. 95T1 protrudes. In the state where the heating plate 80 is disposed between the work support plates 91 and 95, the flat portion around the positioning recess 91T1 in the lower contact post 91T contacts the lower surface of the holding block 84T, while the upper portion The flat portion at the tip of the positioning protrusion 95T1 contacts the upper surface of the sandwiching block 84T, and the sandwiching block 84T is sandwiched between the contact struts 91T and 95T (see FIG. 26B). Further, in a state where the heating plate 80 is retracted from between the workpiece support boards 91 and 95 (see FIG. 26C), the positioning protrusion 95T1 is concavo-convexly fitted into the positioning recess 91T1, and the contact struts 91T, 95T directly contacts.

  FIG. 17 shows the upper surface of the lower work support board 91, while FIG. 21 shows the lower surface of the upper work support board 95. In FIG. 17 and FIG. 21, hatched and dotted hatches are not for showing a cross-sectional shape, but for showing the planar shapes of packings 92P and 96P and intake grooves 93M and 97M, which will be described later, separately from other parts. belongs to.

  As shown in FIG. 17, a part of the upper surface of the lower work support board 91 is a work placement surface R1 covered by the outer component board 31 (work) to be held, and the work placement surface R1 is First to third positioning protrusion walls 91U, 91V, 91W are provided so as to surround them. The first positioning wall 91U is addressed to the lower side portion of the outer component panel 31, and is provided intermittently in the vertical direction in FIG. 17, and the position adjusting mechanism is provided at a position where the positioning wall 91U is interrupted. 91J is provided. As shown in FIG. 18 (A), the position adjustment mechanism 91J is formed so that a screw hole is formed through a fixed projecting wall 100 standing upright from the upper surface of the work support board 91, and is movable to the tip of a bolt 101 screwed into the screw hole. The plate 102 is attached so as to be horizontally movable. The movable plate 102 of the position adjusting mechanism 91J is directed toward the workpiece placement surface R1.

  As shown in FIG. 17, the second positioning protrusion wall 91 </ b> V is directed to both side edges of the outer component panel 31, and is opposed to the workpiece placement surface R <b> 1 in the vertical direction of FIG. 17. And extend parallel to the left-right direction of FIG. Each of the pair of second positioning protrusion walls 91V is provided with a plurality of notches 91V1. Then, in a state where the upward engaging hooks 26C (see FIG. 8) of the outer configuration board 31 are received in the notches 91V1, the second positioning is performed on the step surface 25A (see FIG. 4) of the outer construction board 31. The projecting wall 91V is disposed to face the other. Further, in order to change the interval between the second positioning protrusion walls 91V and 91V, the above-described position adjusting mechanism 91J is attached to one second positioning protrusion wall 91V.

  The third positioning protrusion wall 91W is directed to the upper side portion of the outer component board 31, and extends in a vertical shape in FIG. The outer configuration panel 31 (work) is aligned with the work placement surface R1 by the first to third positioning protrusion walls 91U, 91V, 91W, and the work placement surface R1 is moved by the position adjustment mechanism 91J as necessary. The arrangement of the outer component board 31 can be adjusted.

  A pair of step protrusions 103 and 103 corresponding to the outer surface depressions 24 and 24 (see FIG. 4) of the outer configuration board 31 are formed on the work placement surface R <b> 1 so as to protrude from the upper surface of the work support board 91. As shown in FIG. 18A, the step between the upper surface of the step protrusion 103 and the entire upper surface of the work support plate 91 is the difference between the entire outer surface of the outer component plate 31 and the bottom surface of the outer depressed portion 24. It is almost the same.

  As shown in FIG. 17, a packing 92 </ b> P that can be in close contact with the outer component panel 31 is provided on the work placement surface R <b> 1. The packing 92P is an elastic member made of elastomer (for example, made of silicone rubber) and having a quadrangular cross section. As shown in FIG. 19A, the packing receiving groove 92M is formed in a recessed manner on the upper surface of the work support board 91. And a part thereof bulges from the upper surface of the work support board 91. Specifically, as shown in FIG. 17, the packing receiving groove 92M includes an annular outer groove 92M1 along the outer edge of the outer component board 31, and a region surrounded by the outer groove 92M1 as a plurality of partition regions R2, R3. , R4,... And a partition groove 92M2. The partition regions R2, R3, R4,... Are surrounded by the packing 92P received in the packing receiving groove 92M composed of the outer groove 92M1 and the partitioning groove 92M2. Further, as shown in FIG. 20A, the packing receiving groove 92M is provided with an opening inclined surface 92S with the opening edge chamfered. Normally, the opening inclined surface 92S is exposed from the packing 92P, and when the outer component panel 31 (work) is pressed against the packing 92P, as shown in FIG. 20B, the exposed area of the opening inclined surface 92S. As a result, the packing 92P is compressed and the entire packing 92P is accommodated in the packing receiving groove 92M.

  As shown in FIG. 17, a packing 92P surrounding a pair of partition regions R7 and R7 disposed at both ends in the longitudinal direction of the workpiece placement surface R1 is an outer surface opening 28B (see FIG. 8). The packing 92 </ b> P surrounding the partition region R <b> 6 disposed at the approximate center of the workpiece placement surface R <b> 1 abuts on the opening edge of the handle portion 23 on the outer surface of the outer component panel 31. Further, a part of the partition groove 92M2 extends so as to cross the step of the step protrusion 103, and the packing 92P provided in the partition groove 92M2 also extends across the step of the step protrusion 103.

  As shown in FIG. 17, on the upper surface of the lower work support board 91 (including the upper surface of the stepped protrusion 103), the partition regions R2, R3,. An intake groove 93M is formed to be depressed. The intake groove 93M is stretched over substantially the entire partition regions R2, R3,. Further, as shown in FIG. 18A, inside the work support board 91, an internal flow path 93A extends in the horizontal direction, and a plurality of branch flow paths 93B branched upward from each internal flow path 93A. Each intake groove 93M is open to the bottom surface. In the present embodiment, the intake passage 93R according to the present invention is constituted by the internal flow passage 93A and the branch flow passage 93B. One end of the internal flow path 93A is open to one side surface of the work support board 91, and a pipe joint (not shown) is attached to the opening, and an intake pump (main) is connected to the pipe joint via a pipe (not shown). Corresponding to the “intake means” of the invention. Then, as shown in FIG. 18B, the air in the intake passage 93R and the intake groove 93M is sucked by the intake pump in a state where the outer configuration board 31 (work) is arranged on the work arrangement surface R1. In addition, the outer component board 31 can be adsorbed and held on the work support board 91.

  As shown in FIG. 19A, the portion of the work placement surface R1 on the upper surface of the lower work support board 91 (including the upper surface of the stepped protrusion 103) where the packing 92P and the intake groove 93M are not provided is It is a workpiece contact surface 91F. Normally, the packing 92P protruding from the workpiece contact surface 91F is crushed by the outer component board 31 (work) adsorbed by negative pressure as shown in FIG. It compresses and deforms until it is flush with the contact surface 91F, and its outer component board 31 (work) comes into contact with the work contact surface 91F.

  This completes the description of the structure of the lower work support board 91. Next, the structure of the upper work support board 95 will be described. As shown in FIG. 21, a part of the lower surface of the upper work support board 95 is a work placement surface R10 covered by the inner component board 35 (work) to be held. Position adjustment mechanisms 95J having the same structure as the position adjustment mechanism 91J described above are provided on both sides of the four corners of the workpiece placement surface R10. In addition, a positioning protrusion wall 95W (omitted in FIG. 21; see FIG. 22A) is provided at a portion of the outer edge portion of the work placement surface R10 away from each corner so as to surround the work placement surface R10. ing. In the upper work support board 95, as in the lower work support board 91, the inner component board 35 is aligned with the work placement surface R10 by the positioning protrusion wall 95W, and if necessary, the position adjustment mechanism 95J. The arrangement of the inner component board 35 on the workpiece arrangement surface R10 is adjusted.

  Further, like the packing 92P of the lower work support plate 91 described above, as shown in FIG. 21, the upper work support plate 95 is also provided with a packing 96P received in the packing receiving groove 96M. . The packing receiving groove 96M includes an annular outer groove 96M1 along the outer edge of the inner component board 35, and a partition groove 96M2 that partitions the inner region into a plurality of partition regions R11, R12, R13,. Has been. A plurality of intake grooves 97M are formed in each of the partition regions R11, R12,... Excluding the central partition region R15, and an intake passage 97R communicating with the plurality of intake grooves 97M is provided. As shown in FIG. 22, the intake passage 97 </ b> R includes a branch flow passage 97 </ b> B that branches from the internal flow passage 97 </ b> A extending in the horizontal direction inside the work support board 95 to the intake groove 97 </ b> M. The intake pump 97R is connected to the intake passage 97R. Then, by operating the intake pump in a state in which the inner component board 35 (work) is arranged on the workpiece arrangement surface R10, the inner component board 35 is attracted to the workpiece support board 95 as shown in FIG. Can be held. Further, also on the lower surface of the upper work support board 95, a part of the work placement surface R10 where the packing 96P and the intake groove 97M are not provided is a work contact surface 95F as shown in FIG. ing. Then, when the inner component board 35 (work) is attracted to the work support board 95, as shown in FIG. 23B, for example, the packing 96P is compressed and deformed until it is flush with the work contact surface 95F. The inner structure board 35 contacts the workpiece contact surface 95F.

  The heat welding apparatus 75 of the present embodiment includes, for example, a pressure sensor (not shown) between the intake pump and the intake passages 93R and 97R, and the pressure detected by the pressure sensor when the intake pump is in operation. When the pressure does not fall below the reference pressure, it is determined that an adsorption failure has occurred and an abnormality is reported.

  The description regarding the structure of the heat welding apparatus 75 of this embodiment is above. Next, the manufacturing method of the 1st pallet side wall 20 using the heat welding apparatus 75 is demonstrated.

  In order to manufacture the first pallet side wall 20 using the heat welding device 75, first, the outer component board 31 and the inner component board 35 which have been separately injection-molded in advance are joined (combined). At this time, the outer configuration panel 31 and the inner configuration panel 35 can be easily aligned by fitting the lateral position determination section 71 and the vertical position determination section 72 with the intrusion protrusion 73 (see FIGS. 8 and 10). Can be joined. Then, as shown in FIG. 24 (A), the upper and lower work support boards 91 and 95 are separated from each other, and the joined outer configuration board 31 and inner construction board 35 are placed with the outer construction board 31 side down. Then, it is set on the work placement surface R1 (see FIG. 17) of the lower work support board 91. At this time, the outer configuration board 31 and the inner construction board 35 are easily and correctly arranged on the workpiece arrangement plane R1 by the first to third positioning protrusion walls 91U, 91V, 91W arranged around the workpiece arrangement plane R1. be able to.

  In this state, the heat welding apparatus 75 is started. Then, the upper work support board 95 is lowered together with the elevating base 78, and the outer construction board 31 and the inner construction board 35 are sandwiched between the lower work support board 91 as shown in FIG. . At this time, the packings 92P and 96P (see FIG. 17 and FIG. 21) of both the work support boards 91 and 95 serve as cushioning materials for the outer construction board 31 and the inner construction board 35. When the packings 92P and 96P are in close contact with the outer component board 31 and the inner module board 35, an intake pump (not shown) is operated, and the intake passages 93R and 97R and the intake grooves 93M and 97M in the upper and lower workpiece support boards 91 and 95 are operated. The air inside is aspirated. At this time, if the pressure detected by the pressure sensor does not fall below the reference pressure, an abnormality is reported as an adsorption failure has occurred.

  When there is no abnormality, the packings 92P and 96P of the work support plates 91 and 95 are compressed until they are flush with the work contact surfaces 91F and 95F as shown in FIGS. 19B and 23B. The outer configuration board 31 contacts the work contact surface 91F of the lower work support board 91, while the inner configuration board 35 contacts the work contact surface 95F of the upper work support board 95. In this way, the outer component board 31 is held by the lower work support board 91, while the outer member board 31 is held by the upper work support board 95. At this time, the contact struts 91T and 95T of the upper and lower work support boards 91 and 95 are not in contact with each other with a clearance C1 as shown in FIG. The clearance C1 becomes the crushing amount of the outer component board 31 and the inner component board 35 by welding.

  Next, the upper work support plate 91 is raised, the outer component plate 31 and the inner component plate 35 are separated, and the heating plate 80 enters between the outer component plate 31 and the inner component plate 35. Then, the heating plate 80 is lowered by the drive cylinders 82 and 82, and as shown in FIG. 26 (A), the holding block 84T of the heating plate support frame 84 is brought into contact with the contact column 91T of the lower work support plate 91. Touch. At this time, the heating plate 80 comes into contact with the outer component board 31 and floats slightly above the frame plate 84A of the heating plate support frame 84.

  Next, as shown in FIG. 25A, the upper work support board 95 is lowered, and the inner component board 35 held by the work support board 95 comes into contact with the heating plate 80 (FIG. 26A). State). At this time, there is a gap between the contact column 95T of the upper work support board 95 and the sandwiching block 84T of the heating plate support frame 84. From this state, the work support board 95 is pushed down to a position where the contact post 95T and the clamping block 84T come into contact. As a result, both the joining surfaces of the outer component board 31 and the inner component board 35 are melted so as to be crushed by the heating plate 80.

  Next, the upper work support board 95 is raised, the inner construction board 35 is peeled off from the heating plate 80, and the heating board 80 is raised further, and the outer construction board 31 is peeled off from the heating plate 80. At this time, the inner component board 35 is subjected to a load in a direction away from the upper work support board 95 due to the adhesive force between the outer component board 31 and the inner board 35 and the heating plate 80, and the outer board 31 is disposed on the lower side. A load is applied in a direction away from the work support board 91.

  However, in the heat welding apparatus 75 of this embodiment, the elastomer packings 92P and 96P provided on the work support boards 91 and 95 are brought into close contact with the work (the outer construction board 31 and the inner construction board 35) to apply a negative pressure. As a result, air leakage, which has been a problem in the past, is suppressed, and the work holding force is higher than in the past. Moreover, since the intake grooves 93M and 97M are formed in a plurality of regions surrounded by the packings 92P and 96P (see reference numerals R2 to R5 in FIG. 17 and reference signs R11 to R14 in FIG. 21), the work (outer component board 31 and inner side) The pressure receiving area of the negative pressure in the component board 35) is increased. As a result, the work holding force becomes higher than before, and negative pressure can be applied to substantially the entire work (outer component board 31 and inner component board 35). For example, the inner component board 35 is relatively thin. Therefore, even a workpiece with low rigidity can be held stably. Due to this strong and stable work holding, when the work (outer component board 31 and inner component board 35) is peeled off from the heating plate 80, it is possible to prevent the work from being displaced from the work support plates 91, 95 or coming off. .

  Next, after the heating plate 80 is retracted from between the outer component board 31 and the inner component board 35, the workpiece support plate 95 is lowered, and the contact columns 91T and 95T of the upper and lower workpiece support plates 91 and 95 are in contact with each other. Until then, the outer component board 31 and the inner component board 35 are pressed. Thereby, the edge part by the side of the joining surface of the outer side construction board 31 and the inner side construction board 35 is crushed and welded. Here, in the heat welding apparatus 75 of the present embodiment, the packings 92P and 96P are compressively deformed by the negative pressure until they are flush with the workpiece contact surfaces 91F and 95F of the workpiece support plates 91 and 95, and the workpiece contact Since the surfaces 91F and 95F are in contact with the workpiece (the outer component plate 31 and the inner component plate 35), the amount of crushing of the welded portion between the workpieces is affected by the amount of elastic deformation of the packings 92P and 96P. Absent. Thereby, the welding quality is more stable than before.

  When the workpieces (outer component board 31 and inner component board 35) are welded and the welded portions are solidified, only the suction of the inner component board 35 by the upper workpiece support board 95 is released, and the upper and lower workpiece support boards 91, 91, 95 is separated. Thereby, the 1st pallet side wall 20 manufactured from the outer structure board 31 and the inner structure board 35 can be taken out from the heat welding apparatus 75. FIG.

  Although not shown, a heat welding apparatus provided with a pair of workpiece support plates having shapes corresponding to the outer component plate 61 and the inner component plate 65 of the second pallet side wall 40 instead of the workpiece support plates 91 and 95 described above. Thus, the second pallet side wall 40 can be manufactured by heat-welding the outer component panel 61 and the inner component panel 65.

As described above, according to the heat welding apparatus 75 and the manufacturing method of the present embodiment, it is possible to manufacture the first pallet side wall 20 and the second pallet side wall 40 with stable welding quality.
[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

(1) The heating and welding apparatus 75 of the above embodiment has a configuration in which only the upper work support plate 95 moves up and down, but only a configuration in which the upper and lower work support plates move up and down, and only the lower work support plate. The structure which moves up and down may be sufficient.

(2) In the heat welding apparatus 75 of the above-described embodiment, the intake grooves 93M and 97M are formed in the region surrounded by the packings 92P and 96P. However, for example, the intake grooves 93M and 97M are surrounded by the packing without providing the intake grooves. A recess in which the entire region is depressed may be provided, and an intake passage may be opened on the inner surface of the recess, or a plurality of intake passage openings may be scattered throughout the region surrounded by the packing. Furthermore, for example, a configuration may be adopted in which a large number of annular packings are provided, and one intake passage is opened inside each packing.

(3) In the above embodiment, the packings 92P and 96P are crushed by the work until they are flush with the work placement surfaces R1 and R10 only by the negative pressure of the intake pump. When the workpieces are crushed by only negative pressure, packing 92P, 96P is not started when the workpiece placement surfaces R1, R10 are flush with each other, but only by the reaction force when the workpiece support plates 91, 95 are brought close to each other and pressed against each other. It is good also as a structure crushed until it becomes flush | planar with workpiece | work arrangement | positioning surface R1, R10. Moreover, it is good also as a structure which is not crushed until packing 92P and 96P become the plane | planar with the workpiece | work arrangement | positioning surface R1, R10 also by the reaction force at the time of making the workpiece | work support boards 91 and 95 approach, and pressing workpieces.

20 Side wall of first pallet (welded resin product, hollow resin plate)
31, 61 Outside component panel (work)
35,65 Inside construction panel (work)
40 Side wall of second pallet (welded resin product, hollow resin plate)
71A, 72A Opposing pieces (first opposing protruding wall, second opposing protruding wall)
73 Entry protrusion 75 Heat welding device 80 Heating plate 91, 95 Work support plate 92M, 96M Packing receiving groove 92M1, 96M1 Outer groove 92M2, 96M2 Partition groove 92P, 96P Packing 93M, 97M Intake groove 93R, 97R Intake path R1, R10 Work placement surface

Claims (5)

A pair of work support plates that can be moved toward and away from each other are held separately to form a separated state, the opposing surfaces of the workpieces are heated, and then the pair of work support plates are moved closer to each other. In the method for manufacturing a welded resin product for manufacturing a welded resin product obtained by welding the pair of workpieces using a heat welding apparatus for welding the opposing surfaces of the workpieces,
In the heat welding apparatus,
A packing receiving groove formed in a depressed shape on a workpiece placement surface facing the workpiece of the workpiece support board;
An elastomer packing that is received in the packing receiving groove and partially protrudes from the workpiece placement surface;
One of the workpiece support surfaces is formed through the work support plate, and one end is opened to a region surrounded by the packing on the work placement surface, and the other end is connected to an intake means for putting the inside of the packing into a negative pressure state. an intake passage provided to be,
After the pair of workpieces are joined and sandwiched between the pair of workpiece support plates and adsorbed to the workpiece support plates, the workpieces are separated together with the pair of workpiece support plates, After allowing the heating plate to enter and pressing the opposing surfaces of the workpieces against the heating plate, the workpieces are separated from each other and the heating plate is retracted, and then the opposing surfaces of the workpieces are pressed and welded together. The heat welding apparatus is configured in
The pair of workpieces are provided with positioning fitting portions that are fitted to each other when the workpieces are joined, and the heating plate is a relief hole for avoiding interference with the positioning fitting portion The method for manufacturing a welded resin product is characterized in that the positioning fitting portion is pressed against the heating plate and crushed. The method for producing a welded resin product according to claim 1, wherein the packing is compressible and deformable until it is crushed by the work and is flush with the work placement surface . Wherein among the workpiece placement surface to form a suction groove in the region surrounded by the packing, according to claim 1 or 2, characterized in that allowed to open one end of the intake passage on the inner surface of the intake grooves Manufacturing method of welded resin product. The pair of workpieces has a structure in which a hollow resin plate as a component part of a box pallet, a container, and other conveyance devices is divided into two in the thickness direction,
The packing receiving groove includes an annular outer groove along the outer edge of the workpiece, and a partition groove that divides a region surrounded by the outer groove into a plurality of partition regions, and is received in the packing receiving groove. been surrounds each said divided areas in the packing, according to any one of claims 1 to 3, characterized in that allowed to open one end of the intake passage to said plurality of divided areas Manufacturing method of welded resin product. As the positioning fitting portion, a pair of first opposing projecting walls facing each other in a first direction orthogonal to the joining direction of the workpieces, and a second direction orthogonal to both the joining direction and the first direction A pair of second opposing protruding walls facing each other and a plurality of protruding protrusions that can be fitted between the first opposing protruding parts and between the second opposing protruding parts are provided on the pair of workpieces. The method for producing a welded resin product according to any one of claims 1 to 4, wherein:

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