Tile blank loading mechanism and tile blank loading system using same

Abstract

The utility model discloses a tile billet loading mechanism and a tile billet loading system using the same, the tile billet loading mechanism is installed on a rack, the rack is provided with a parking space used for parking a drying trolley, a plurality of trays which are sequentially arranged from bottom to top are arranged on the drying trolley in a supporting mode, a feeding frame is arranged on one side of the parking space on the rack, and the feeding frame is connected with the drying trolley in a supporting mode. A tile taking and placing structure is mounted on the feeding frame; the feeding frame is provided with a tray pushing structure used for pushing the trays out of the drying trolley towards the other side. Temporary bearing structures in one-to-one correspondence with the trays are arranged on the other side, located on the parking space, of the rack; the feeding frame is provided with a tray returning structure used for driving the trays to return to the drying trolley from the temporary bearing structure. During loading, the feeding frame pushes away the trays on the upper layer of the target trays, a large space is avoided for the upper portions of the target trays, loading is smooth, meanwhile, the density of the trays is obviously increased, the tile loading amount of a single vehicle is increased, and tile production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tile making equipment, in particular to a green tile loading mechanism and a green tile loading system using the mechanism. Background Art

[0002] The tile making process includes mud refining, extrusion, cutting, stamping, drying and other processes. The stamped tiles are uniformly loaded on a drying car and transferred to a drying room for drying. The drying car is mainly a structure with multiple layers of trays on the frame. When loading, a batch of tiles are grabbed by a manipulator, and then lifted to a height higher than the target layer tray on the drying car. The manipulator extends into the interlayer space of the drying car. When the grabbed batch of tiles reaches the top of the target tray, the tiles are put down, the manipulator exits, and the loading of the next layer of tiles is carried out. For example, the utility model patent with the announcement number "CN217920369U" and the name "Tile Continuous Shelving System" discloses this type of loading technology.

[0003] In actual production, in order to increase the amount of tiles that can be loaded on a drying car, the height between layers on the drying car is usually not very large. As a result, when the manipulator enters and exits the interlayer space, it often interferes with the pallet, causing structural damage and even production accidents. Although there is currently a method of increasing the interlayer height to avoid interference, this will reduce the amount of tiles that can be loaded on a single drying car, thereby increasing the turnover density of the drying car and increasing the energy consumption for drying. Therefore, the relationship between the amount of tiles that can be loaded on a single drying car and the interlayer height makes it impossible to balance the amount of tiles that can be loaded on a single drying car and the smoothness of loading, which has become one of the bottleneck problems that limit the current efficiency of tile production. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a green tile loading mechanism which can load the vehicle smoothly, increase the amount of tiles loaded per vehicle and help improve the production efficiency of tiles, and a green tile loading system using the mechanism.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a tile blank loading mechanism is installed on a frame, the frame is provided with a parking space for parking a drying car, a number of trays arranged in sequence from bottom to top are placed on the drying car, a loading rack is provided on the frame at one side of the parking space, a tile picking and placing structure is installed on the loading rack; a pushing plate structure for pushing the tray to the other side of the drying car is provided on the loading rack; a temporary supporting structure corresponding to the tray one by one is provided on the frame at the other side of the parking space; a return plate structure for driving the tray to return from the temporary supporting structure to the drying car is provided on the loading rack.

[0006] As a preferred technical solution, one end of the loading rack close to the parking space also serves as the push plate structure.

[0007] As a preferred technical solution, the return plate structure includes a return plate magnet fixedly arranged on one end of the loading rack close to the parking space.

[0008] As a preferred technical solution, the return plate structure includes a clamping claw structure or a hooking claw structure installed on the loading rack.

[0009] As a preferred technical solution, the supporting surface of the temporary supporting structure is gradually raised in the direction away from the corresponding tray, and the end of the temporary supporting structure close to the tray is lower than the corresponding tray, and the end away from the tray is higher than the corresponding tray.

[0010] As a preferred technical solution, a pushing mechanism for pushing the drying cart is provided on the frame.

[0011] As a preferred technical solution, a parking positioning mechanism is provided on the frame at the parking space.

[0012] The green tile loading system using the green tile loading mechanism comprises a frame, on which the green tile loading mechanism is mounted, a loading and feeding mechanism is provided between the loading rack and the frame, and a placement mechanism for placing input green tiles is provided on the side of the loading rack away from the parking space.

[0013] As a preferred technical solution, the blank placing mechanism includes a blank connecting belt installed on the frame, and the blank connecting belt is connected to a blank connecting controller; a blank placing platform is provided on one side of the blank connecting belt, and the frame is provided with a blank transferring mechanism for transferring the blanks on the blank connecting belt to the blank placing platform.

[0014] Due to the adoption of the above technical solution, the tile blank loading mechanism is installed on a frame, the frame is provided with a parking space for parking the drying car, the drying car is provided with a number of trays arranged in sequence from bottom to top, the frame is provided with a loading rack on one side of the parking space, and a tile picking and placing structure is installed on the loading rack; the loading rack is provided with a pushing plate structure for pushing the tray to the other side of the drying car; the frame is provided with a temporary supporting structure corresponding to the tray one by one on the other side of the parking space; the loading rack is provided with a return plate structure for driving the tray to return from the temporary supporting structure to the drying car. When loading, the utility model pushes away the tray on the upper layer of the target tray, and the upper tray leaves or most of it leaves the drying car and is temporarily supported at the temporary supporting structure, thereby leaving a large amount of space on the upper part of the target tray, and the loading rack can smoothly enter and exit without interference problems, and loading is smooth. When the loading rack is withdrawn, the tray return structure is used to return the pushed out tray to its original position, and the returned tray is used as the next target tray for loading. Therefore, the distance between the target tray and the second tray above it only needs to meet the space requirements of the loading rack, and the drying vehicle has the first tray above it in this space, the tray density is significantly increased, and the tile loading capacity of a single vehicle is increased, which is conducive to reducing the turnover density, reducing the drying energy consumption, and improving the tile production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0016] Figure 1 This is a structural schematic diagram of a tile loading mechanism according to an embodiment of the utility model;

[0017] Figure 2 yes Figure 1 Schematic diagram of AA structure;

[0018] Figure 3 yes Figure 2 An enlarged schematic diagram of the structure at one of the corners of the drying vehicle;

[0019] Figure 4 yes Figure 3 Schematic diagram of CC structure;

[0020] Figure 5 yes Figure 1 The loading rack begins to extend into the drying vehicle to push the tray;

[0021] Figure 6 yes Figure 5 The state diagram when the loading rack reaches the target pallet;

[0022] Figure 7 yes Figure 1Schematic diagram of BB structure;

[0023] Figure 8 yes Figure 7 State diagram when starting to push the cart;

[0024] Fig. 9 yes Figure 8 The state diagram when the cart is returned after pushing;

[0025] Fig.10 This is a schematic diagram of the structure of the green tile loading system of the utility model embodiment;

[0026] Fig.11 yes Fig.10 Schematic diagram of DD structure.

[0027] In the figure: 1-frame; 11-temporary supporting structure; 2-parking positioning mechanism; 3-trolley mechanism; 31-trolley seat; 32-trolley plate; 33-trolley limiting structure; 34-trolley driver; 4-loading rack; 41-tile picking and placing structure; 42-push plate structure; 43-return plate structure; 5-loading feeding mechanism; 51-loading lifting seat; 52-loading lifting controller; 53-loading transverse shift controller; 6-blank placing mechanism; 61-blank connecting belt; 62-blank placing platform; 63-blank moving mechanism; 64-blank transverse shift seat; 65-blank moving controller; 66-blank moving lifting seat; 67-blank moving lifting controller; 68-blank moving suction cup; 9-drying car; 91-tray; 92-end support platform; 93-return limiting structure; 94-blank. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, exemplary embodiments of the present invention are described only by way of illustration. It is undoubted that one of ordinary skill in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0029] like Figures 1 to 9 As shown together, the tile loading mechanism is installed on a frame 1, and the frame 1 can be an integral frame or a combination of frames in which each functional component is separately arranged and relatively fixed, which is not limited here. The frame 1 is provided with a parking space for parking the drying vehicle 9, and the drying vehicle 9 stops after reaching the parking space.

[0030] Preferably, a parking positioning mechanism 2 is provided on the frame 1 at the parking space, and the parking positioning mechanism 2 is used to enable the drying car 9 to accurately park at the parking space. The parking positioning mechanism 2 can be provided on the top, side and / or bottom of the drying car 9, and can be implemented by driving a limit plate to flip. When the drying car 9 enters and exits, the limit plate is parallel to the entry and exit direction of the drying car 9 and does not affect its entry and exit. After entering, it is driven to a posture approximately perpendicular to the entry and exit direction of the drying car 9, restricting the entry and exit of the drying car 9 to achieve a parking positioning effect. The parking positioning mechanism 2 is a well-known technology that can be known to those skilled in the art, and will not be described in detail here.

[0031] The entry and exit of the drying cart 9 can be realized by manual pushing, or the drying cart 9 running track passes through the parking space, and the drying cart 9 on the running track is pushed into and out of the parking space by a related machine, which is not limited here. In the case of the above-mentioned mechanical pushing and pushing method, a pusher mechanism 3 for pushing the drying cart 9 is provided on the frame 1.

[0032] The trolley mechanism 3 described in this embodiment includes a trolley seat 31 movably installed on the frame 1 along the travel direction of the drying trolley 9, and a trolley plate 32 with the top end extending to the bottom of the drying trolley 9 is swingably installed on the trolley seat 31. The top end of the trolley plate 32 can be swung in the travel direction of the drying trolley 9. A trolley limiting structure 33 is provided between the trolley plate 32 and the trolley seat 31 to limit the trolley plate 32 from swinging in the opposite direction of the travel of the drying trolley 9; a trolley driver 34 is provided between the trolley seat 31 and the frame 1.

[0033] When the top of the cart plate 32 is located at the bottom of the drying cart 9, the cart driver 34 drives the cart seat 31 forward, and under the rigid restriction of the cart limit structure 33, the top of the cart plate 32 can rigidly drive the drying cart 9 to be pushed in. After being pushed in, the parking positioning mechanism 2 positions the drying cart 9, and the cart driver 34 drives the cart seat 31 backward. The front swing of the top of the cart plate 32 can automatically avoid the body structure of the drying cart 9, and exit the parking space without affecting the drying cart 9. The same is true for pushing the drying cart 9 out of the parking space.

[0034] The cart limiting structure 33 can be realized by a cart limiting part integrally arranged on the side of the cart plate 32 away from the parking space. The cart limiting part makes the center of the entire cart plate 32 located on the side where its swing pin is away from the parking space. When the cart plate 32 is in a free state, the cart limiting part rests on the cart seat 31 and plays a rigid limiting role when pushing the cart. The cart driver 34 can be realized in the form of a drive cylinder, a motor with a chain belt, or a motor with a gear rack transmission. This embodiment is illustrated by a motor with a chain belt.

[0035] In actual settings, a cart mechanism 3 can be set at the entrance and exit positions of the parking space to push out the drying cart 9 that has been loaded in the parking space and push in the empty cart upstream of the parking space; two sets of cart plates 32 can also be set on one cart mechanism 3. When pushing in, the front cart plate 32 pushes out the drying cart 9 that has been loaded in the parking space, and the rear cart plate 32 pushes in the empty cart upstream of the parking space. The above form changes are all within the protection scope of the present utility model.

[0036] The drying cart 9 is provided with a plurality of trays 91 arranged in sequence from bottom to top, and the trays 91 are used to carry the green tiles 94. In this embodiment, in order to facilitate the subsequent trays 91 to be pushed out of the drying cart 9 and to leave the required space, only the two ends of the tray 91 are supported on the drying cart 9, that is, the drying cart 9 is provided with end supports 92 for supporting the two ends of the tray 91 respectively.

[0037] A loading rack 4 is provided on the rack 1 at one side of the parking space, and a pick-up and placement tile structure 41 is installed on the loading rack 4. The pick-up and placement tile structure 41 is used to pick up the blank tile 94 and finally place it on the target tray 91. Conventionally, the pick-up and placement tile structure 41 includes a suction cup seat and a suction cup, etc., which is a common technology in the art and will not be described in detail here.

[0038] The loading rack 4 is provided with a pushing plate structure 42 for pushing the tray 91 to the other side of the drying cart 9; the frame 1 is provided with a temporary supporting structure 11 corresponding to the tray 91 on a one-to-one basis at the other side of the parking space; the loading rack 4 is provided with a returning plate structure 43 for driving the tray 91 to return from the temporary supporting structure 11 to the drying cart 9.

[0039] When the blank tile 94 is loaded onto the vehicle, the loading rack 4 uses the push plate structure 42 to push the first tray 91 above the target tray 91 horizontally, and the tray 91 begins to leave the drying vehicle 9, and one side reaches the temporary supporting structure 11. When the loading rack 4 reaches the target tray 91, the pushed out tray 91 may completely or mostly leave the drying vehicle 9, and the loading rack 4 is in the space between the target tray 91 and the second tray 91 above it, which is equivalent to the pushed out tray 91 leaving the loading space for the loading rack 4, and the space is surplus, and interference problems are not likely to occur. After the tile placement structure 41 places the blank tile 94 on the target tray 91, the loading rack 4 exits the drying vehicle 9, and the return plate structure 43 drives the originally pushed out tray 91 back into the drying vehicle 9, and the tray 91 becomes the next target tray 91. In the process of the above-mentioned tray 91 entering and exiting the drying vehicle 9, the end support platform 92 also serves as a track for its horizontal movement.

[0040] In actual setting, one end of the loading rack 4 close to the parking space also serves as the pushing plate structure 42, and its end face is pressed against the tray 91 to achieve pushing, which can simplify the frame structure. Of course, it is also possible to use other separately set parts for pushing.

[0041] The return plate structure 43 can be implemented in various forms such as passive and active. Among them, in the passive form, the return plate structure 43 includes a return plate magnet fixedly set on one end of the loading rack 4 close to the parking space, and uses magnetic attraction to drive the tray 91 to return to the drying cart 9. Preferably, a return limit structure 93 for limiting the return position of the tray 91 is provided on the side of the drying cart 9 close to the loading rack 4, so that the rigid limit is used to cooperate with the withdrawal action of the loading rack 4 to completely withdraw from the drying cart 9, and the magnetic attraction of the return plate magnet is forcibly released, so that the tray 91 returns to the specified position on the drying cart 9. The return limit structure 93 can be implemented by a retaining edge or a retaining pin fixedly set at one end of the end support 92 close to the loading rack 4, which is not limited here, and this embodiment is only illustrated by a baffle.

[0042] When the return plate structure 43 adopts an active form, the return plate structure 43 includes a clamping claw structure or a hooking claw structure installed on the loading rack 4. The clamping claw structure clamps the pushed out tray 91 when the loading rack 4 exits to drive it back to its original position, and the hooking claw structure hooks the frame position of the pushed out tray 91 when the loading rack 4 exits to drive it back to its original position. This active form can use sensors to trigger the action of releasing the clamping or hooking of the tray 91 when the tray 91 returns to the specified position on the drying vehicle 9, so that the tray 91 can automatically stop at the above specified position.

[0043] Among them, the clamping claw structure can be directly realized by using pneumatic fingers, or a structure with a clamping function driven by a drive cylinder or a motor, and the hook claw structure can be realized by using a hook plate driven by a rotary cylinder. Of course, under the above structural principle, the active form adopts an electromagnetic structure that can be powered on and off, which belongs to the equivalent technical means transformation, and this means should also be within the protection scope of the return plate structure 43.

[0044] Preferably, the supporting surface of the temporary supporting structure 11 is gradually raised in the direction away from the corresponding tray 91, and the end of the temporary supporting structure 11 close to the tray 91 is lower than the corresponding tray 91, and the end away from the tray 91 is higher than the corresponding tray 91. The proximal end is lower than the corresponding tray 91, so that the tray 91 can be smoothly supported by the temporary supporting structure 11 when it is pushed out, and the distal end is higher than the corresponding tray 91 to ensure the supporting function of the temporary supporting structure 11, and the temporary supporting structure 11 forms a line contact with the tray 91, and the tray 91 and the corresponding end support 92 also form a line contact, thereby reducing the resistance of the process of entering and exiting the drying car 9 and ensuring smooth entry and exit. The temporary supporting structure 11 described in this embodiment is realized by two oblique support rod structures. Of course, the use of other multiple support rods or support plates, etc., belongs to the equivalent technical means of transformation, which should be within the protection scope of the temporary supporting structure 11.

[0045] The green tile loading mechanism described in this embodiment can be applied to any occasion where a robot is used to extend into the drying vehicle 9 for loading. This embodiment only lists one green tile loading system below to illustrate its specific application scenario.

[0046] like Fig.10 and Fig.11 As shown, the green tile loading system using the green tile loading mechanism comprises a frame 1, on which the green tile loading mechanism is mounted, a loading and feeding mechanism 5 is provided between the loading rack 4 and the frame 1, and a placement mechanism 6 for placing input green tiles 94 is provided on the frame 1 on the side of the loading rack 4 away from the parking space.

[0047] The loading and feeding mechanism 5 is used to drive the loading rack 4 and the tile placing and taking-in structure 41 thereon to complete the loading and loading action from the blank placing mechanism 6 to the drying vehicle 9. Specifically, it includes a loading lifting seat 51 and a loading lifting controller 52. The loading rack 4 is laterally movably installed on the loading lifting seat 51, and a loading transverse movement controller 53 is provided between the loading rack 4 and the loading lifting seat 51. The lifting and transverse movement structure principle is a common technology in the loading manipulator, and will not be repeated here.

[0048] Based on the present embodiment, the drying car 9 and the blank placing mechanism 6 are separated on both sides of the loading rack 4, and the picking and placing tile structure 41 needs to move synchronously with the extension of the loading rack 4 to the extended end of the loading machine to facilitate the picking and placing tile action. Therefore, an additional structure for driving the picking and placing tile structure 41 to move horizontally relative to the loading rack 4 should be provided between the picking and placing tile structure 41 and the loading rack 4. Of course, the picking and placing tile structure 41 should be installed on the loading rack 4 for horizontal movement. Its horizontal movement driving structure can adopt an active driving form such as a driving cylinder or a motor coordinated transmission, or it can adopt a rack and pinion mechanism between the frame 1 and the loading rack 4, and a sprocket coaxial with the gear is also provided on the loading rack 4. The sprocket then pulls the chain to drive the picking and placing tile structure 41 to move synchronously in a passive form, which is not limited here; the above horizontal movement driving structures of the picking and placing tile structure 41 are all well-known technologies that can be known to technicians in this field, and will not be repeated here.

[0049] The blank placing mechanism 6 is used to place the input blanks 94. In this embodiment, the blank placing mechanism 6 includes a blank receiving belt 61 installed on the frame 1. The blank receiving belt 61 steps a distance slightly greater than the length of the blank 94 after reaching each blank 94. Finally, a specified number of blanks 94 form a row on the blank receiving belt 61. The blank receiving belt 61 is connected to a blank receiving controller to control its stepping timing and stepping distance. The blank receiving controller can be implemented by a servo motor or the like.

[0050] A blank placing platform 62 is provided on one side of the blank connecting belt 61, and the blank placing platform 62 can be a fixed table surface or a conveying surface of a related conveyor belt, which is not limited here; the frame 1 is provided with a blank transferring mechanism 63 for transferring the blanks 94 on the blank connecting belt 61 to the blank placing platform 62. After a row of blanks 94 are formed on the blank connecting belt 61, the blank transferring mechanism 63 transfers them to the blank placing platform 62. After a new row of blanks 94 are formed on the blank connecting belt 61, the loading rack 4 can load two rows of blanks 94 together.

[0051] The blank transfer mechanism 63 includes a blank transfer transverse shifting seat 64 which is laterally movable and installed on the frame 1, and a blank transfer controller 65 is provided between the blank transfer transverse shifting seat 64 and the frame 1; a blank transfer lifting seat 66 which is vertically movable and installed on the blank transfer transverse shifting seat 64, and a blank transfer lifting controller 67 is installed between the blank transfer lifting seat 66 and the blank transfer transverse shifting seat 64, and a blank transfer suction cup 68 is installed on the blank transfer lifting seat 66. The blank transfer mechanism 63 also realizes the displacement of the blank 94 from the blank receiving belt 61 to the blank placing platform 62 through lifting and lowering and transverse movement.

[0052] Of course, in actual application, based on the fact that the directions of the blank receiving belt 61 and the blank placing platform 62 may be different, and the two rows of blanks 94 on the tray 91 need to be in a 180° symmetrical posture, a transposition seat for transverse rotation installation can be added to the blank transfer transverse shifting seat 64, a transposition controller is arranged between the transposition seat and the blank transfer transverse shifting seat 64, and the blank transfer suction cup 68 is installed on the transposition seat. During the shifting process, the transposition seat is used to rotate and shift the row of blanks 94, so that the two rows of blanks 94 can be loaded on the drying vehicle 9 in a 180° symmetrical posture. The above structure should also be within the protection range of the blank transfer mechanism 63.

[0053] When loading, the loading rack 4 is used to push away the upper tray 91 of the target tray 91 to release the space between the layers. The loading rack 4 can enter and exit smoothly without interference, and loading is smooth. When the loading rack 4 is withdrawn, the tray return structure 43 is used to return the pushed tray 91 to its original position, and the returned tray 91 is used as the next target tray 91 for loading. As a result, the distance between the target tray 91 and the second tray 91 above it can meet the space requirements for the loading rack 4 to enter and exit, and the drying vehicle 9 has the first tray 91 above it in this space, so the density of the trays 91 is significantly increased, and the tile loading capacity of a single vehicle is increased, with the maximum increase ratio reaching 50%, which is conducive to reducing the turnover density, reducing the drying energy consumption, and improving the tile production efficiency.

[0054] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A green tile loading mechanism is installed on a frame, the frame is provided with a parking space for a drying vehicle, and the drying vehicle is provided with a plurality of trays arranged in sequence from bottom to top, characterized in that: A loading rack is provided on the frame at one side of the parking space, and a picking and placing tile structure is installed on the loading rack; a pushing plate structure for pushing the pallet to the other side of the drying vehicle is provided on the loading rack; a temporary supporting structure corresponding to the pallet one by one is provided on the frame at the other side of the parking space; a return plate structure for driving the pallet to return from the temporary supporting structure to the drying vehicle is provided on the loading rack.

2. The green tile loading mechanism according to claim 1, characterized in that: One end of the loading rack close to the parking space also serves as the pushing plate structure.

3. The green tile loading mechanism according to claim 1, characterized in that: The return plate structure includes a return plate magnet fixedly arranged on one end of the loading rack close to the parking space.

4. The green tile loading mechanism according to claim 1, characterized in that: The return plate structure includes a clamping claw structure or a hooking claw structure installed on the loading rack.

5. The green tile loading mechanism according to claim 1, characterized in that: The supporting surface of the temporary supporting structure is gradually raised in a direction away from the corresponding tray, and an end of the temporary supporting structure close to the tray is lower than the corresponding tray, and an end away from the tray is higher than the corresponding tray.

6. The green tile loading mechanism according to claim 1, characterized in that: The frame is provided with a pusher mechanism for pushing the drying vehicle.

7. The green tile loading mechanism according to claim 1, characterized in that: A parking positioning mechanism is provided on the frame at the parking position.

8. A green tile loading system using the green tile loading mechanism according to any one of claims 1 to 7, comprising a frame on which the green tile loading mechanism is mounted, characterized in that: A loading and feeding mechanism is provided between the loading rack and the frame, and a blank placing mechanism for placing input blanks is provided on the frame at a side of the loading rack away from the parking space.

9. The green tile loading system according to claim 8, characterized in that: The blank placing mechanism comprises a blank-connecting belt installed on the frame, and the blank-connecting belt is connected to a blank-connecting controller; a blank placing platform is provided on one side of the blank-connecting belt, and a blank transferring mechanism for transferring the blanks on the blank-connecting belt to the blank placing platform is provided on the frame.

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