JPH0592240U - Case built-in device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a container embedding device capable of mechanically assembling an empty case, saving labor in case collection work, and improving efficiency. [Structure] By driving a container reversing machine, the first empty container conveyed to the reversing position is reversed to the backward posture, the third empty container is reversed to the forward posture, and only the second empty case is not reversed. To the turning position. The container direction changer is driven to bring the second empty container into contact with the contact member to change the direction by 90 degrees, and convey the first and third empty cases to the built-in position without changing the direction. By driving the container embedding machine, the first empty container, which has been turned to the rearward posture, is temporarily stopped at the built-in position, the second empty container, which has changed direction, is stored inside the first empty container, and then opened to the rearward posture. The first empty case and the third empty case opened in the forward posture are fitted together, and the second empty case is housed in the internal space of each empty case, and the three empty cases are It is conveyed to the next process in the state of being combined into one.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a case-incorporating device used for stacking and collecting empty cases having a U-shaped cross section, such as a container made of synthetic resin or a box made of cardboard.

[0002]

[Prior Art]

 Conventionally, as a method of stacking and collecting the horizontally long empty cases formed in the U-shaped cross section as in the above-mentioned example, for example, a plurality of empty cases recovered from the sorting process is operated by 2 to 3 people. One person holds one case each by hand, places a plurality of empty cases in line on a pallet prepared in advance, stacks the empty cases of the next stage on the upper side of each empty case, and The upper surface side peripheral edge of each empty case stacked on the lower side and the lower surface side peripheral edge of each empty case stacked on the upper side are fitted to each other, and multiple empty cases are stacked on the pallet. Collect in the stacked state.

[0003]

[Problems to be solved by the device]

 However, as described above, since a large number of empty cases are sequentially stacked one by one by the operator, there is a problem that the stacking work of empty cases takes time and effort. Further, since the upper surface side and the lower surface side of each empty case are formed in the same shape and dimension, the upper empty case cannot be stored in the lower empty case, and the operator's hand does not. Since the number of stacking empty cases is limited to the height at which they can be loaded and unloaded, it is difficult to stack multiple empty cases on one pallet, and there is the problem that the case recovery efficiency per unit time is low. is doing.

In view of the above problems, the present invention reduces the time required for collecting empty cases by combining a large number of empty cases into a set of three and collecting them sequentially to reduce the number of cases. It is an object of the present invention to provide a case-embedded device that can save labor and improve efficiency.

[0005]

[Means for Solving the Problems]

 In this invention, a reversing position, a direction changing position, and an assembling position are sequentially set on a case conveyance path that conveys a large number of empty cases aligned in the same posture, and the empty case is conveyed to the reversal position. A case reversing means for reversing the empty case opened to a rearward posture and a state opened to a frontal posture is provided to hit one side corner portion of the empty case conveyed to the position at the direction changing position. A case for abutting a member to change the direction by 90 degrees is provided, and an empty case that has been turned by the case turning means inside the empty case that has been turned to the rearward posture by the case turning means at the incorporated position. The empty case, which has been inverted to the forward posture by the case inversion means, and the empty case, which has been inverted to the rearward posture, are fitted to each other by fitting the opening side peripheral portions of the empty cases. Characterized in that One is the case embedded device provided with case built means for combining the.

[0006]

[Action]

 This invention drives the case inversion means to invert the first empty case conveyed to the inversion position to the rearward posture, the third empty case to the forward posture, and the second empty case only. Transport without inverting. By driving the case direction changing means, the second empty container conveyed to the direction changing position is brought into contact with the contact member to change the direction by 90 degrees, and the first and third empty cases are not changed in direction. Transport. By driving the case assembling means, the first empty case, which has been turned to the rearward posture, is temporarily stopped at the assembling position, the second empty case is transported to the same position, is stored inside the first empty case, and then faces forward. The third empty case, which has been turned upside down, is conveyed to the assembled position, the opening side peripheral portions of the first empty case and the third empty case are fitted together, and the second empty case is inserted into the inner space of each empty case. Store the second empty case and combine each of the three empty cases into one. In the same manner, a large number of empty cases are sequentially combined into a set of three and transported.

[0007]

[Effect of the device]

 According to this invention, a large number of empty cases are combined into one set and collected one by one, so that the empty cases can be sequentially stacked on the pallet one by one by a worker as in the conventional example. Since it is possible to mechanically assemble the empty case with a unique cross-sectional shape and to collect the three empty cases as one, they can be collected together. It is possible to shorten the time required for the empty case recovery work, and to save labor and improve the efficiency of the case recovery work.

[0008]

【Example】

 An embodiment of the present invention will be described in detail below with reference to the drawings. The drawings show a container assembling device used for stacking and collecting empty containers made of synthetic resin, and in FIGS. 1 and 2, the container assembling device 1 has a horizontally long empty space formed in a U-shaped cross section. The containers A ... Are aligned in the longitudinal direction and sequentially transferred onto the first conveyor 2, and the container feeder 3 arranged at the feeding position on the first conveyor 2 is driven to drive each empty container A. The first empty container A is driven by the container reversing device 5 which is placed at the reversing position on the second conveyor 4 while sequentially transferring the right long side of the second conveyor 4 in the conveying direction. Is rotated backward by 90 degrees, and the third empty container A is rotated forward by 90 degrees and is sequentially transferred onto the third conveyor 6.

Subsequently, the container direction changing machine 7 arranged at the direction changing position on the third conveyor 6 is driven to change the direction of the second empty container A by 90 degrees, and then the posture on the third conveyor 6 is changed. The container posture correcting machine 8 arranged at the correction position is driven to correct the posture of the second empty container A, and the second empty container A is sequentially transferred onto the fourth conveyor 9. Next, the container assembling machine 10 arranged at the assembling position on the fourth conveyor 9 is driven to store the second empty container A in the first empty container A and the third empty container A in the first empty container A. After the empty containers A are fitted and combined into one, the container standing machine 11 arranged at the standing position on the fourth conveyor 9 is driven to remove the three empty containers A ... The combined state is erected in a vertical posture, and sequentially placed on the fifth conveyor 12.

In the container feeder 3 described above, the machine body 13 is arranged at the feeding position set on the first conveyor 2 so as to be orthogonal to the longitudinal direction of the empty container A conveyed to the same position. , A driving force of a drive motor 17 with a speed reducer disposed on the lower end of the feeding belt 16 by tensioning a feeding belt 16 between pulleys 14 and 15 axially supported at the feeding end and the trailing end of the main body 13 of the machine. The feed belts 16 and 16 are rotated in the feed direction via the pulleys 18 and 19 and the drive belt 20 so that the feed belts 16 and 16 are arranged on the second conveyer 4 orthogonal to the side of the feed position on the first conveyer 2. The empty containers A are sequentially transferred to. For example, a large number of empty containers A ... Collected from the selection process (not shown) are aligned in the longitudinal direction while being opened in an upward posture, and sequentially transferred onto the first conveyor 2, The container feeder 3 disposed at the feeding position on the bear 2 is driven to sequentially transfer the empty long sides A of the empty containers A on the second conveyor 4 with the right long sides thereof oriented in the transport direction.

As shown in FIGS. 3 and 4, the container reversing machine 5 described above has an upper opening portion above the reversing position set on the second conveyor 4 and an upper opening portion of the empty container A conveyed to the same position. The elevating frame 21 is disposed so as to face each other, and the piston rod of the elevating cylinder 22 disposed above the same position is connected and fixed to the central portion of the upper surface of the elevating frame 21. Moreover, the piston rods of the holding cylinders 23 and 23 horizontally fixed to the lower end portions on both sides of the elevating frame 21 are connected and fixed to the central portions of the rear surfaces of the movable plates 24 and 24 arranged on both sides of the inversion position. A rotary pad 26 in which the rotary rods of the rotary cylinders 25, 25 fixed to the central portions on the front side of the movable plates 24, 24 are arranged so as to face both short side surfaces of the empty container A transported to the reverse position. , 26 are connected and fixed to the center of rotation.

That is, the operation of the lifting / lowering cylinder 22 lifts the empty container A to a predetermined height above the lower position where the empty container A conveyed to the reversal position on the second conveyor 4 is held. The elevating frame 21 is stopped in the ascending position. Further, by the operation of the holding cylinders 23, 23, the forward position for pressing the short side surfaces of the empty container A conveyed to the reversing position and the short side surfaces of the empty container A are spaced at predetermined intervals. The rotary pads 26, 26 are moved back and forth to the retracted position separated from each other. Also, by the operation of the rotary cylinders 25, 25, the intermediate position for holding the empty container A lifted above the inversion position in the upward posture and the empty container A in the rearward posture are opened. The rotation pads 26, 26 are stopped to rotate to a backward rotation position of 90 ° backward rotation and a forward rotation position of 90 ° forward rotation in a state where the empty container A is opened in a forward posture.

The second conveyor 4 is configured such that the feed belt 29 is stretched between the pulleys 27 and 28 axially supported at the start end and the end of the transfer side, respectively, and the drive motor with a speed reducer disposed at the lower end of the end. The drive belt 30 rotates the feed belts 29, 29 in the carrying direction via the pulleys 31, 32 and the drive belt 33, and the third belt 3 is arranged close to the terminal end of the second conveyor 4 on the carrying side. The empty containers A ... Are sequentially transferred onto the conveyor 6. In addition, a stopper 34 is provided between the feed belts 29, 29 forming the second conveyor 4 so as to face the bottom portion on the long side of the empty container A conveyed to the reversal position, and is arranged at the lower portion of the same position. By the operation of the installed retracting cylinder 35, the stopper 34 is retracted into and out of the projecting position projecting above the transport surface of the second conveyor 4 and the retracted position recessed below the transport surface.

As shown in FIG. 1, the above-mentioned container direction changing machine 7 has, on the left side of the direction changing position set on the third conveyor 6, a long left side end part of the empty container A conveyed to the same position. The contact member 36 is disposed so as to face each other, and the piston rod of the conversion cylinder 37 disposed on the left side portion of the same position is connected and fixed to the center portion of the rear surface side of the contact member 36, so that By the operation, the contact member 36 is moved back and forth between the forward position where it contacts the left side end of the empty container A conveyed to the direction changing position and the retracted position where it avoids contact with the left side end of the empty container A. Move. That is, when the second empty container A 2 passes, the conversion cylinder 37 is operated to bring the contact member 36 into contact with the left end on the longitudinal side of the empty container A conveyed to the direction changing position. As the fulcrum, turn the direction of empty container A by 90 degrees.

The above-described container posture correcting machine has correction plates 38, 38 on both sides of the posture correcting position set on the third conveyor 6 so as to face both side surfaces of the empty container A conveyed to the same position. At the same time, the piston rods of the correction cylinders 39, 39 arranged on both sides of the same position are connected and fixed to the central portion on the rear surface side of the correction plates 38, 38, and by the operation of the correction cylinders 39, 39, The correction plates 38 and 38 are moved back and forth to a forward position where both side surfaces of the empty container A conveyed to the posture correction position are pressed and a retracted position where the third container 6 is retracted to the outside. That is, when the second empty container A passes, the correction cylinders 39, 39 are actuated to press the correction plates 38, 38 against both longitudinal side surfaces of the empty container A conveyed to the posture correction position. The long side of the empty container A is corrected to a posture parallel to the conveying direction of the third conveyor 6, and the empty container A is moved to the center of the conveying surface of the third conveyor 6.

In the third conveyor 6 described above, the feed belt 42 is stretched between the rollers 40 and 41 which are axially supported at the start end and the end of the transfer side, and the drive motor 4 with a speed reducer disposed at the lower end of the end. The feed belt 42 is rotated in the conveyance direction via the pulleys 44, 45 and the drive belt 46 by the driving force of the third conveyor 6, and on the fourth conveyor 9 arranged near the conveyance-side end of the third conveyor 6. The empty containers A are sequentially transferred to.

As shown in FIG. 5, FIG. 6, FIG. 7, and FIG. 8, the container assembling machine 10 has the fourth conveyor 9 arranged at a position slightly lower than the conveying surface of the third conveyor 6, The lifting plate 47 is arranged at the center of the built-in position set on the conveyance-side starting end of the fourth conveyor 9, and the piston rod of the lifting cylinder 48 arranged at the lower part of the same position is used to lift the lifting plate 47. It is connected and fixed to the central part of the lower surface, and by the operation of the lifting cylinder 48, it is raised to a height position that is horizontal with the transfer surface of the third conveyor 6 and lower than the transfer surface of the fourth conveyor 9. The lifting plate 47 is stopped up and down at the lowered position.

A support roller 49 is disposed between the end of the third conveyor 6 on the transfer side and the start of the fourth conveyor 9 on the transfer side, and both ends of the support roller 49 are supported by brackets 50. , The piston rod of the supporting cylinder 51 disposed at the lower part of the same position is connected and fixed to the central portion on the lower surface side of the bracket 50, and the operation of the supporting cylinder 51 causes the supporting cylinder 51 to move upward above the conveying surface of the third conveyor 6. The support roller 49 is stopped to move up and down to the projected rising position and the descending position that is recessed below the conveying surface of the fourth conveyor 9.

The fourth conveyor 9 is configured such that the feed belt 54 is stretched between the pulleys 52 and 53 axially supported on the start side and the end side of the transfer side, respectively, and the drive motor with a reduction gear disposed on the lower side of the end side. The feed belts 54, 54 are rotated in the conveying direction by the driving force of the rotor 55 via the pulleys 56, 57 and the drive belt 58, and the fifth belt 9 is disposed orthogonal to the conveying side end of the fourth conveyor 9. The three empty containers A ... Are sequentially transferred onto the conveyor 12 in a state of being combined into one. In addition, a stopper 59 is provided between the feed belts 54, 54 constituting the fourth conveyor 9 so as to face the longitudinal bottom of the empty container A conveyed to the incorporated position, and is arranged at the lower part of the same position. By the operation of the retracting cylinder 60, the stopper 59 is retracted and retracted at the protruding position protruding above the transport surface of the fourth conveyor 9 and the retracted position recessed below the transport surface.

As shown in FIG. 2, the container erection machine 11 rotatably supports an L-shaped erection frame 61 at an erected position set at the conveyance-side end portion of the fourth conveyor 9 so that the erection frame 61 can oscillate and rotate. The piston rod of the standing cylinder 62 arranged at the lower part of the same position is connected to the shaft end portion of the standing frame 61, and by the operation of the standing cylinder 62, it becomes horizontal to the conveying surface of the fourth conveyor 9. The tilted position where the long frame portions 61a, 61a of the standing frame 61 are stopped below the posture and the posture in which the long frame portion 61a of the standing frame 61 is vertical to the conveyance surface of the fifth conveyor 12, 61a is rotated to the standing position where rotation is stopped. That is, the three empty containers A ... Combined into one are brought into contact with the short frame portion 61b of the standing frame 61 which is stopped to rotate to the tilted position, and after temporarily stopping, the standing frame 61 is rotated to the standing position. Then, the three empty containers A ... are erected in a vertical posture while being combined into one.

Assuming that the illustrated embodiment is configured as described above, the assembling operation when the container assembling apparatus 1 combines a large number of empty containers A ... into a set of three will be described below. First, as shown in FIG. 1, a large number of empty containers A ... Are sequentially transferred onto the first conveyor 2 while being opened upward, and the empty containers A ... are arranged in the longitudinal direction. And sequentially conveys to the feeding position on the first conveyor 2. At the same time, the container feeding machine 3 is driven to sequentially transfer the empty right-side longitudinal sides of the empty containers A, which are conveyed to the feeding position, to the reversing position on the second conveyor 4 with the right long side oriented in the conveying direction.

Next, when the first empty container A is conveyed to the reversal position on the second conveyor 4, the retracting cylinder 35 is operated to temporarily stop the first empty container A with the stopper 34. 3, as shown in FIG. 3, the holding cylinders 23, 23 of the container reversing machine 5 are actuated to press the rotary pads 26, 26 against the first empty container A stopped at the same position and hold it in a horizontal posture. To do. At the same time, the lifting cylinder 22 is lifted to temporarily lift the first empty container A to a predetermined height while holding it in a horizontal posture, and as shown in FIG. When activated, the first empty container A is rotated 90 degrees to the state in which the first empty container A is opened in the rearward posture. After that, the lifting cylinder 22 is lowered to transfer the first empty container A onto the second conveyor 4 in a state of being rotated 90 degrees backward.

At the same time, the holding cylinders 23, 23 are restored to separate the rotary pads 26, 26 from the first empty container A, and the rotary cylinders 25, 25 are stopped to rotate to the initial position, and then retracted. The operation cylinder 35 is retracted, the stopper 34 is retracted below the conveying surface, and the first empty container A is transferred to the direction changing position on the third conveyor 6 while being opened in the rearward posture.

Subsequently, when the second empty container A is conveyed to the reversing position, the container reversing machine 5 is made to stand by, the retracting cylinder 35 is not operated, and the second empty container A is opened in the upward posture. The state is transferred to the direction changing position on the third conveyor 6. When the third empty container A is conveyed to the reversing position, the retracting cylinder 35 is operated, the third empty container A is temporarily stopped by the stopper 34, and then the container reversing machine 5 is driven to move the 3 The second empty container A is rotated forward by 90 degrees in a state in which the empty container A is opened in the forward posture, and the empty container A is transferred to the direction changing position on the third conveyor 6 while keeping the state in which the empty container A is opened in the backward posture.

Next, when the first empty container A is transported to the direction changing position on the third conveyor 6, the container direction changing machine 7 is made to stand by and the first empty container A is opened in the rearward posture. It is conveyed to the posture correction position as it is. Subsequently, when the second empty container A is transported to the direction changing position, as shown in FIG. 1, the conversion cylinder 37 of the container direction changing machine 7 is operated to move the second empty container A to the second direction. A contact member 36 is brought into contact with the left end on the longitudinal side of A, and the direction of the empty container A is changed by 90 degrees with the contact member 36 as a fulcrum, and the second empty container A is parallel to the conveying direction of the third conveyor 6. The container A is conveyed to the posture correction position while being opened in the upward posture. When the third empty container A is conveyed to the direction changing position, the changing cylinder 37 is returned to the original position, the contact member 36 is retracted to the initial position, and the third empty container A is opened in the forward posture. It is conveyed to the posture correction position while it is in the open state.

Next, when the first empty container A is conveyed to the attitude correction position on the third conveyor 6, the container attitude corrector 8 is made to stand by and the first empty container A is opened in the rearward attitude. It is transferred to the built-in position on the fourth conveyor 9 as it is. Subsequently, when the second empty container A is conveyed to the posture correction position, as shown in FIG. 1, the correction cylinders 39, 39 of the container posture correcting machine 8 are operated to move the second empty container A. The correction plates 38 and 38 are pressed against both longitudinal side surfaces of the container A to correct the orientation of the empty container A to a posture parallel to the conveying direction of the third conveyor 6, and to set the mounting position of the empty container A. The third conveyor 6 is moved to the center portion of the conveyance surface and transferred to the incorporated position on the fourth conveyor 9. When the third empty container A is conveyed to the posture correction position, the correction cylinders 39, 39 are returned to their original positions so that the correction plates 38, 38 are retracted to the initial position, and the third empty container A is moved forward. It is transferred to the built-in position on the fourth conveyor 9 with the posture opened.

Next, when the first empty container A is conveyed to the incorporated position on the fourth conveyor 9, the retracting cylinder 60 is operated to move the first empty container A as shown in FIG. Is temporarily stopped by the stopper 59 while being opened rearward. Subsequently, as shown in FIG. 6, the second empty container A is conveyed to the built-in position with the upper position opened, and the second empty container A is stopped at the same position, and the second empty container A is moved toward the second empty container A. Store the empty container A.

After that, as shown in FIG. 7, the lifting cylinder 48 of the container built-in machine 10 is moved upward to move the first empty container A at a height position which is horizontal to the transfer surface of the third conveyor 6. The lifting plate 47 lifts. At the same time, the supporting cylinder 51 is moved upward to lift the second empty container A above the conveying surface of the third conveyor 6 by the support roller 49, and the second empty container A and the third conveyor 6 face each other. Form a space between the faces.

Subsequently, the third empty container A is conveyed to the built-in position while being opened in the forward posture, and the second empty container A is directed toward the inside of the third empty container A which is conveyed to the same position. To store. At the same time, the supporting cylinder 51 is lowered so that the supporting roller 49 is lowered below the conveying surface to fit the opening side peripheral portions of the first empty container A and the third empty container A, and The second empty container A is stored in the inner space of each empty container A, and three empty containers A are combined into one.

After the combination is completed, as shown in FIG. 8, the lifting cylinder 48 and the retracting cylinder 60 are moved down to retract the lifting plate 47 and the stopper 59 below the conveying surface, and the three empty containers A are inserted. ... are conveyed to the standing position on the fourth conveyor 9 in the state of being combined into one. The three empty containers A ... Combined into one are brought into contact with the short frame portion 61b of the standing frame 61 which has been stopped in the tilted position and stopped temporarily, and then the standing cylinder 62 of the container standing machine 11 is set. By actuating, the standing frame 61 is rotated to the standing position, and the three standing empty containers A are erected in a vertical posture while being combined into one, and are transferred onto the fifth conveyor 12. At the same time, the fifth conveyor 12 is driven to convey the three empty containers A ... In the state of being combined into one to the container loading step (not shown). After that, the standing cylinder 62 is restored to stop the rotation of the standing frame 61 to the tilted position, and in the same manner, a large number of empty containers A ... Sequentially convey.

As described above, since a large number of empty containers A ... Are combined in a set and collected one by one, the empty containers A are put on the pallet one by one by the operator as in the conventional example. It is possible to eliminate the trouble and work of sequentially stacking, and to mechanically assemble an empty container A with a U-shaped cross section, and to combine three empty containers A ... into one. Since the entire container is collected as it is, the time required for the collection work of the empty container A can be shortened, and the labor and efficiency of the container collection work can be reduced.

In the correspondence between the configuration of the present invention and the above-described embodiment, the empty case of the present invention corresponds to the empty container A of the embodiment, and similarly, in the same manner, the case transport path includes the second conveyor 4 and Corresponding to the third conveyor 6 and the fourth conveyor 9, the case inverting means corresponds to the container inverting machine 5, the case direction changing means corresponds to the container direction changing machine 7, and the case assembling means corresponds to the container incorporating means. Although it corresponds to the machine 10, the present invention is not limited to the configuration of the above-described embodiment.

In the above-described embodiment, a large number of empty containers A ... Are conveyed to the reversing position while being opened upward, but for example, a large number of empty containers A ... are opened downward. It may be conveyed to the reversal position as it is, and in this case, the container reversing machine 5 arranged at the same position is driven to reverse the first empty container A to the front and open in the rearward posture. Then, the third empty container A is rolled back and inverted to the state in which it is opened in the rearward posture.

[Brief description of drawings]

FIG. 1 is a plan view showing an assembling operation of a container embedding device.

FIG. 2 is a side view showing an assembling operation of the container assembling apparatus.

FIG. 3 is a front view showing a holding operation of the container reversing machine.

FIG. 4 is a side view showing a reversing operation of the container reversing machine.

FIG. 5 is a side view showing a first container embedding operation by the container embedding machine.

FIG. 6 is a side view showing a second container embedding operation by the container embedding machine.

FIG. 7 is a side view showing a third container embedding operation by the container embedding machine.

FIG. 8 is a side view showing a state in which three containers are combined into one.

[Explanation of symbols]

 A ... Empty container 1 ... Container assembling device 4 ... Second conveyor 5 ... Container reversing machine 6 ... Third conveyor 7 ... Container direction changing machine 9 ... Fourth conveyor 10 ... Container assembling machine 22 ... Elevating cylinder 23 ... Holding cylinder 25 ... Rotating cylinder 26 ... Rotating pad 36 ... Contact member 37 ... Conversion cylinder 47 ... Lifting plate 48 ... Lifting cylinder 49 ... Support roller 51 ... Supporting cylinder

Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B65G 47/88 B 8010-3F 47/90 D 8010-3F 47/96 8010-3F

Claims (1)

[Scope of utility model registration request] 1. A reversing position, a direction changing position, and an assembling position are sequentially set on a case conveyance path for conveying a plurality of empty cases aligned in the same posture, and conveyed to the reversal position. A case reversing means for reversing the empty case to be opened in a rearward posture and to be opened in a forward posture is provided, and one side corner portion of the empty case conveyed to the position at the direction change position. A case direction changing means for contacting a member and changing the direction by 90 degrees is provided, and an empty case changed direction by the case direction changing means is provided at the built-in position inside the empty case reversed to the rearward posture by the case changing means. And the empty case that has been inverted to the forward attitude by the case inverting means and the empty case that has been inverted to the rearward attitude are fitted into the opening-side peripheral edge portions of each of the three empty cases. Case embedded device provided with case built means for combining.