JP5044357B2 - Insulation box manufacturing jig - Google Patents

Description

  The present invention relates to a heat insulating box manufacturing jig used in a manufacturing process of a heat insulating box applied to a commercial refrigerator / freezer.

  Commercial refrigeration / freezers are used in restaurants, restaurants, refrigerated vehicles, etc., and are therefore a large variety of small lots. Moreover, the heat insulation box applied to these commercial refrigeration / freezers is mainly formed by forming a foam heat insulation wall inside a metal shell such as a stainless steel plate (for example, SUS304). It is the structure which comprised the enclosed 1 or several accommodating space.

  In such a heat insulation box, an inner mold having a shape corresponding to each housing space is inserted and arranged in the outer shell, and a foam heat insulating wall is formed by injecting and foaming a foam heat insulating material into the space between the outer shell and the inner mold. (See Patent Document 1 and Patent Document 2). In Patent Document 1, it is possible to form a urethane foam heat insulating material by suppressing the occurrence of cavitation by injecting a mixed stock solution immediately after mixing two predetermined stock solutions between an outer box and an inner box. Are listed. Patent Document 2 describes that a foam insulation is formed by injecting a foaming stock solution inside after preheating in a preheating chamber and a foaming chamber in a state where a core is mounted on a box.

An example of the manufacturing process of this type of heat insulating box will be described with reference to FIG. 4. The outer shell 2 of the heat insulating box 1 to be manufactured is placed on a transport pallet 7 and transported to a foam molding section, and foaming is performed. At the molding part, a jig 11 for forming the inner mold 10 for molding the accommodation space of the heat insulating box 1 is inserted into the outer shell 2, and the back surface molding part 12 provided on the jig 11 and the exit / retreat mechanism 14 are inserted. The inner mold 10 is formed by the projecting and positioned peripheral surface molding portion 13, and a space corresponding to the foam heat insulating wall 3 to be formed between the inner mold 10 and the outer shell 2 is formed, and foaming is performed in this space. The foamed heat insulating wall 3 is formed by pouring the stock solution, and then the peripheral surface forming portion 13 of the jig 11 is retracted by the retracting / retracting mechanism 14, and then the jig 11 is pulled out so that the heat insulating box 1 is formed. Manufactured. In FIG. 4, reference numeral 8 denotes a jig support part that supports a jig 11 that forms the inner mold 10 in the foam molding part, and the transport pallet 7 is a jig 11 supported by the jig support part 8. After being transported and positioned just below, the lift mechanism (not shown) can be moved up and down and positioned between a predetermined position shown in the figure and a lower transport position.
JP-A-11-199696 JP 2005-319584 A

  In the production of such a heat insulating box 1, it takes a lot of time to switch materials, lines, parts, jigs 11 forming the inner mold 10 and the like due to the production of a variety of small lots, and the productivity is low. There was a problem. Among these factors, the material can improve the work efficiency by pre-cutting the stainless steel plate in the previous work in advance, and the line flow line can also improve the tact difference of the work by introducing a computer, In addition, the standardization of parts can reduce the work man-hours and improve work efficiency by getting used to the work.

  However, the jig 11 forming the inner mold 10 needs to be switched to one corresponding to its shape and size for each product type and mounted on the jig support 8, so that it is limited to improving the efficiency of the switching work. was there. In particular, as shown in FIGS. 3 (a) and 3 (b), when the heat insulation box 1 having a specification in which only the depth dimension of the heat insulation box 1 is different from H1 and H2 (H1> H2) is manufactured. Since it is necessary to use separate jigs 11, a large amount of jigs 11 are prepared, and the jigs 11 are switched when manufacturing the heat insulation box 1 having different depth dimensions. It was a factor that significantly deteriorated efficiency.

  In particular, in the cross-sectional structure of the heat insulating box 1, a frame part 4 having a slightly larger width than the thickness of the foam heat insulating wall 3 is provided at the opening end of the outer shell 2, and the foam heat insulating wall 3 extends from the frame part 4 of the outer shell 2. It is formed to the same thickness as the width dimension of the frame part 4 up to the inner position of the predetermined dimension, and forms a flange part 5 together with the frame part 4, and a step is formed between the flange part 5 and the foam insulation wall 3 on the back side. When it has the part 6, it is necessary to provide a step part in the upper part of the peripheral surface shaping | molding part 13 of the jig | tool 11 which forms the inner mold | type 10, and the depth dimension of the heat insulation box 1 is H1, H2 (H1 If it is different from> H2), not only the height dimension of the peripheral surface molding part 13 but also the arrangement position of the step part will be different, so that it is impossible to share the jig 11.

  In view of the above-mentioned conventional problems, the present invention provides a heat insulating box manufacturing jig that can be manufactured with high productivity without replacing the jig in manufacturing a heat insulating box having specifications that differ only in depth dimensions. The purpose is to provide.

  The heat insulation box manufacturing jig of the present invention includes a jig for forming an inner mold in an outer shell, and foam-molding a heat insulating wall in a space between the outer shell and the inner mold formed by the jig. A heat insulation box manufacturing jig used in a method for manufacturing a heat insulation box that forms a housing space surrounded by a heat insulation wall in the outer shell, and has a back surface forming portion and a peripheral surface forming portion, A movable plate capable of moving back and forth in the inner and outer directions of the outer opening is disposed at a portion of the surface molding portion facing the vicinity of the outer opening.

  According to this configuration, when manufacturing a heat-insulating box having specifications with different depth dimensions, the movable plate of the jig forming the inner mold is switched between the protruding state and the retracted state according to the depth dimension. As a result, the jig replacement work can be reduced and the number of jigs required for each specification can be reduced, thus improving the productivity of heat insulation box manufacturing. be able to.

  Further, in the retracted state of the movable plate, the molding surface of the portion other than the movable plate arrangement portion of the peripheral surface molding portion and the molding surface of the movable plate are configured to be flush with each other, and the outer side of the outer surface of the molding surface of the movable plate. Provided in the part with a recessed portion where the side edge of the frame portion formed on the opening edge of the outer shell abuts the end portion, and when the movable plate protrudes and the movable plate retracts in the peripheral surface molding portion When the covered portion is provided with a recessed portion in which the side edge of the frame portion formed on the opening edge of the outer shell abuts on the end portion, the cross-sectional structure of the heat insulating box body has the frame portion of the outer shell and a predetermined inner side thereof. Even in the case of a structure that forms a flange part with a width dimension slightly larger than the thickness of the other foam insulation wall with the foam insulation wall in the size range, when manufacturing a heat insulation box with specifications with different depth dimensions Change the jig by simply switching the movable plate between the protruding state and the retracted state as described above. Rukoto not be able to cope.

  Further, when a cylinder device that drives the movable plate to move in and out is provided, the movable plate can be automatically switched between the protruding state and the retracted state, and the manufacturing efficiency can be further improved.

  According to the jig for manufacturing a heat insulating box of the present invention, when manufacturing a heat insulating box having specifications with different depth dimensions, the movable plate of the jig forming the inner mold is moved into a protruding state and a retracted state. Since it can be dealt with by simply switching between them, jigs can be shared for heat insulation boxes with different depth dimensions, reducing jig replacement work and reducing the number of jigs required for each specification. Therefore, the productivity of manufacturing the heat insulating box can be improved.

  Hereinafter, an embodiment of a jig for manufacturing a heat insulating box according to the present invention will be described with reference to FIGS. In addition, since the structure of the heat insulation box manufactured in this embodiment and a basic manufacturing process are the same as the prior art example demonstrated with reference to FIG. 3, FIG. 4, the description is used and about the same component. Are denoted by the same reference numerals, description thereof is omitted, and constituent elements unique to the present embodiment will be mainly described.

  As shown in FIG. 2, the jig 11 that forms the inner mold 10 in the heat insulation box manufacturing process of the present embodiment includes an attachment block 15 that is attached to the jig support portion 8 (see FIG. 4) of the foam molding portion, A pair of guide rods 16a and 16b extending downward from both side portions of the mounting block 15, the back surface forming portion 12 fixedly attached to the lower ends of the guide rods 16a and 16b, and the guide rods 16a and 16b. A lift block 17 that is freely supported, a cylinder device 18 that is interposed between the mounting block 15 and the lift block 17 and drives the lift block 17 to move up and down, and 4 that forms a peripheral surface molding surface of four inner circumferences. The peripheral surface forming portion 13 is interposed between the mounting block 15 and the upper end of each peripheral surface forming portion 13 so that the peripheral surface forming portion 13 is moved between the normal position and the retracted position. So that it can swing freely And a pair of upper and lower connecting links 20 that constitute a four-bar parallel link mechanism between each circumferential surface forming member 13 and the lifting block 17 to translate each circumferential surface forming portion 13. ing.

  In the jig 11 having this configuration, the cylinder device 18 contracts and the elevating block 17 rises, the link of the support link mechanism 19 is inclined inward, and the connecting link 20 is inclined obliquely, so that each peripheral surface forming portion 13 is inclined. When the cylinder device 18 is extended from the state shown in FIG. 2 (a) where it is retracted to the retracted position, the elevating block 17 is lowered as shown in FIG. The link of the mechanism 19 hangs vertically, the connecting link 20 becomes horizontal, and each peripheral surface molding portion 13 is projected to a predetermined setting position during molding, so that the inner mold 10 is formed. As described above, in this embodiment, the retracting mechanism 14 of FIG. 4 is configured by a four-bar parallel link mechanism configured by the lifting block 17, the cylinder device 18, the support link mechanism 19, and the connecting link 20. Yes.

  In the jig 11 having such an overall configuration, in the present embodiment, as shown in FIGS. 1A and 1B, it faces the vicinity of the opening of the outer shell 2 of the peripheral surface forming plate 13 a in the peripheral surface forming portion 13. A movable plate 21 slidable in and out of the opening of the outer shell 2 is disposed at the upper end. As shown in FIG. 1A, in a state where the movable plate 21 is retracted, the molding surface 13b of the peripheral surface molding plate 13a other than the portion where the movable plate 21 is disposed and the movable plate 21 are in a state of being retracted. The molding surface 21a is configured to be flush with the molding surface 21a. And the recessed part 22 is provided in the part of the predetermined dimension range of the outer side 2 of the outer shape 2 of the molding surface 21a of this movable plate 21, and the side edge of the frame part 4 formed in the opening edge of the outer dimension 2 whose depth dimension is H1. 4a is comprised so that it may contact | abut to the edge part of this recessed part 22. FIG. Thus, the flange portion 5 of the heat insulating box 1 having a depth dimension of H1 is formed by the recessed portion 22, and the step portion 6 is formed by the step portion 22a between the forming surface 21a and the recessed portion 22.

  Further, as shown in FIG. 1B, in a state where the movable plate 21 is projected, the movable plate 21 is located outside the frame portion 4 formed at the opening edge of the outer shell 2 having a depth dimension of H2, and A recessed portion 23 is provided in a portion of the surface molding plate 13a covered with the movable plate 21 when the movable plate 21 is retracted, and the frame portion 4 formed at the opening edge of the outer shell 2 having a depth dimension of H2. The side edge 4 a is configured to abut against the end portion of the recessed portion 23. Thus, the flange portion 5 of the heat insulating box 1 having a depth dimension of H2 is formed by the recessed portion 23, and the step portion 6 is formed by the step portion 23a between the forming surface 13b and the recessed portion 23.

  For this reason, as a specific configuration, a recessed portion 22 is formed on the upper outer surface of the movable plate 21, and the movable plate 21 is slidable with respect to the vertical middle portion of the movable plate 21 and the upper end portion of the circumferential surface forming plate 13a opposite thereto. Slide portions 21b and 13c that overlap each other are provided, and a cover plate portion 21c that fits in a recessed portion 23 formed in the lower portion of the slide portion 13c of the peripheral surface forming plate 13a is provided below the movable plate 21.

  An L-shaped bracket 24 is fixed to the inner surface of the upper end portion of the movable plate 21, and the tip of the piston rod 25 a of the cylinder device 25 disposed on the inner surface of the upper end portion of the peripheral surface molding portion 13 is connected to the bracket 24. The cylinder device 25 is configured to be switched between a state in which the movable plate 21 is protruded and a state in which it is retracted by the retracting operation of the cylinder device 25.

  In FIG. 1, reference numeral 26 denotes a claw presser cylinder that presses the frame portion 4 of the outer shell 2 from above so as not to be deformed by internal pressure during foam molding. Further, at the time of foam molding, the outer wall of the outer shell 2 is pressed by an outer mold (not shown) so as not to be deformed by internal pressure.

  In the above configuration, when the heat insulating box 1 is manufactured, the jig 11 constituting the inner mold 10 is conveyed to the foam molding part, and the attachment block 15 is attached to the jig support part 8 (see FIG. 4). The jig 11 is installed in the state shown in FIG. Next, the cylinder device 25 is controlled to be retracted depending on whether the depth dimension of the heat insulating box 1 to be manufactured is H1 or H2, and the movable plate 21 is retracted as shown in FIG. Or a state in which the movable plate 21 protrudes as shown in FIG.

  Next, the transport pallet 7 on which the outer shell 2 of the heat insulating box 1 is placed is carried into the foam molding part and positioned immediately below the jig 11, and then lifted by a lifting mechanism (not shown). The jig 11 is inserted into the outer shell 2 and positioned at a predetermined molding height position as shown in FIG. Next, as shown in FIG. 2 (b), the cylinder device 18 is protruded and the elevating block 17 is lowered, whereby the peripheral surface forming portion 13 is protruded and positioned at a specified position during forming, The inner mold 10 is formed by the surface molding part 12 and the peripheral surface molding part 13.

  In this state, a space corresponding to the foam heat insulating wall 3 to be formed between the inner mold 10 and the outer shell 2 is formed. Further, as shown in FIG. 1A, in a state where the movable plate 21 is retracted, the side edge 4 a of the frame portion 4 of the outer shell 2 contacts the recessed portion 22 of the movable plate 21, and the frame portion 4. In the state in which the forming space of the flange portion 5 is formed by the recessed portion 22 and the movable plate 21 protrudes as shown in FIG. 1B, the frame of the outer shell 2 is formed in the recessed portion 23 of the peripheral surface forming plate 13a. The side edge 4 a of the part 4 abuts, and the frame part 4 and the recessed part 22 form a forming space for the flange part 5. By injecting the foaming stock solution into this molding space, the foam insulation wall 3 having the flange 5 is formed in the outer shell 2, and the heat insulation box 1 is manufactured.

  Thereafter, the cylinder device 18 is retracted to raise the elevating block 17, and the peripheral surface forming portion 13 of the jig 11 is retracted to release the mold, and then conveyed by an elevating mechanism (not shown). By lowering the pallet 7 to the lower conveyance position, the jig 11 is extracted from the outer shell 2, and the manufactured heat insulation box 1 is conveyed to the next process.

  As described above, according to the present embodiment, when the heat insulation box 1 having different specifications of the depth dimension is manufactured, the movable plate 21 of the jig 11 that forms the inner mold 10 is projected according to the depth dimension. By switching between the state and the retracted state, it is possible to cope without exchanging the jig 11, so that the work for exchanging the jig 11 can be reduced and the number of jigs 11 required for each specification can be reduced. Therefore, productivity of the manufacturing process of the heat insulation box 1 can be improved.

  Further, in the retracted state of the movable plate 21, the molding surface 13b of the peripheral surface molding plate 13a other than the movable plate arrangement portion and the molding surface 21a of the movable plate 21 are configured to be flush with each other, and the molding surface of the movable plate 21 is formed. In the outer side portion of the outer shell 2 of 21a, there is provided a recessed portion 22 where the side edge 4a of the frame portion 4 formed on the opening edge of the outer shell 2 abuts against the end portion, and the peripheral surface of the movable plate 21 is projected. A recessed portion 23 in which the side edge 4a of the frame portion 4 formed on the opening edge of the outer shell 2 abuts the end portion is provided in a portion of the molded plate 13a covered with the movable plate 21 when the movable plate 21 is retracted. Therefore, the cross-sectional structure of the heat insulation box 1 is slightly larger in width than the thickness of the other foam heat insulation wall 3 due to the frame portion 4 of the outer shell 2 and the foam heat insulation wall in the predetermined range of the inside thereof. Even in the case of the structure forming the flange part 5, the depth dimensions are different. When manufacturing the heat-insulating main body 1 of the like, simply by switching between the ON state withdrawal and projecting state of the movable plate 21 as described above, can be addressed to without exchanging the jig 11.

  Further, since the cylinder device 25 that drives the movable plate 21 to move in and out is provided, the movable plate 21 can be automatically switched between the protruding state and the retracted state, thereby further improving the manufacturing efficiency. it can.

  In the above description of the embodiment, an example in which the heat insulating box 1 is manufactured by foaming the foam heat insulating wall 3 in the space between the outer shell 2 and the inner mold 10 formed by the single jig 11. However, the present invention is not limited to the example in which the inner mold 10 is composed of a single jig 11, and a plurality of jigs 11 are in contact with each other or between the jigs 11, 11. By arranging the foam molding space in the space, it can be applied to the production of the heat insulation box 1 in which the storage space of an arbitrary size and shape is defined by the foam heat insulation wall 3. The same effect can be exhibited by disposing the movable plate 21 on the peripheral surface molding portion 13 that faces the peripheral wall of the outer shell 2 of the tool 11.

  The jig for manufacturing a heat insulation box body according to the present invention, when manufacturing a heat insulation box body having specifications with different depth dimensions, moves the movable plate of the jig forming the inner mold between the protruding state and the retracted state. Since it can be dealt with just by switching, jigs can be shared for heat insulation boxes with different depth dimensions, reducing jig replacement work and reducing the number of jigs required for each specification. The productivity of the heat insulating box manufacturing can be improved, and the heat insulating box manufacturing can be suitably applied to the manufacture of heat insulating boxes of various types and small lots.

The principal part structure of the jig | tool for heat insulation box body manufacture of one Embodiment of this invention is shown, (a) is sectional drawing of the state which the movable plate retracted, (b) is sectional drawing of the state which the movable plate protruded. The schematic structure of the jig | tool of the embodiment is shown, (a) is a diagram showing a state in which the peripheral surface molding portion is retracted, (b) is a state in which the peripheral surface molding portion is positioned at a predetermined position during molding. FIG. (A), (b) is a perspective view which shows the heat insulation box from which the depth dimension which should be manufactured differs. The longitudinal cross-sectional view which shows the manufacturing process of the heat insulation box in a prior art example and the same embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat insulation box 2 Outer shell 3 Foam heat insulation wall 4 Frame part 4a Side edge 10 Inner type | mold 11 Jig 12 Back surface formation part 13 Peripheral surface formation part 13b Molding surface 21 Movable plate 21a Molding surface 22 Indentation part 23 Indentation part 25 Cylinder apparatus

Claims (3)

  A housing space surrounded by a heat insulating wall in the outer shell by placing a jig for forming the inner mold in the outer shell and foaming a heat insulating wall in the space between the outer shell and the inner mold formed by the jig. A heat insulating box manufacturing jig used in the method for manufacturing a heat insulating box body that has a back surface forming portion and a peripheral surface forming portion, and a portion facing the vicinity of the outer opening of the peripheral surface forming portion. A jig for manufacturing a heat insulation box, characterized in that a movable plate is provided that can slide in and out of the outer opening.   In the retracted state of the movable plate, the molding surface of the portion other than the movable plate arrangement portion of the peripheral surface molding portion and the molding surface of the movable plate are configured to be flush with each other and on the outer side of the outer surface of the molding surface of the movable plate The side edge of the frame portion formed on the opening edge of the outer shell is provided with a recessed portion that abuts the end portion, and is covered with the movable plate when the movable plate is retracted in the peripheral surface molding portion in the protruding state of the movable plate. 2. The jig for manufacturing a heat insulation box according to claim 1, wherein a recessed portion is provided in a portion where the side edge of the frame portion formed on the opening edge of the outer shell comes into contact with the end portion.   The jig for manufacturing a heat insulating box according to claim 1 or 2, wherein a cylinder device for driving the movable plate out and out is disposed.

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