Automatic candy packaging equipment

Abstract

The invention discloses automatic candy packaging equipment, and relates to the technical field of food packaging, the automatic candy packaging equipment comprises a packaging mechanism, the packaging mechanism comprises a layer plate I and a layer plate II, the center of the layer plate I is provided with a through groove I, the center of the layer plate II is provided with a through groove II, the periphery of the through groove II is provided with a movable triangular block, and the bottom end of the layer plate I is provided with an elastic disc spring; the bottom end of the elastic disc spring is fixedly connected with a pressure triangular block, the movable triangular block and the pressure triangular block are in sliding connection through an inclined face, and the bottom end of the second layer plate is fixedly connected with a supporting column. A single-seal packaging technology is adopted, paper clothes are limited and folded through the first through groove and knotted and fixed at a time through the rotating clamp, a traditional double-seal or complex folding technology is not needed, and the use amount of packaging paper is reduced by 30% or above. The paper cover is of a double-layer structure of outer-layer plastic and inner-layer oiled paper, the inner-layer oiled paper only needs to cover the candy contact face, the outer-layer plastic is cut according to needs, and material redundancy is avoided. And the economic benefits of enterprises are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of food packaging, in particular to an automatic candy packaging device. Background Art

[0002] Candy packaging is crucial for preserving its quality and facilitating storage, transportation, and sales, requiring a balance of safety, functionality, and aesthetics. Food-grade materials are typically used, such as an inner layer of oil-coated paper to prevent sticking and an outer layer of plastic or aluminum foil to protect against moisture and oxygen. Automatic or semi-automatic equipment handles the feeding, wrapping, and sealing processes. Common packaging styles include individual individual packaging and multi-packaging. Some high-end or holiday products are even packaged in gift boxes for added appeal. Clear labeling of ingredients, expiration date, and other information is essential to protect consumer rights.

[0003] For example, patent CN108820269B discloses an automatic candy packaging machine, which includes a frame, a mixing mechanism, a rotating disk, a capping mechanism and a feeding mechanism. The frame has a discharge port, the mixing mechanism includes a mixing bin fixedly arranged on the frame, and a feeding port is provided at the bottom of the mixing bin. The rotating disk is rotatably arranged on the frame through a groove wheel mechanism, and a plurality of through holes for accommodating bottle bodies are evenly distributed on the circumference of the rotating disk, and the through holes are connected to the feeding port. The capping mechanism includes an air claw for grabbing a cork and a cylinder unit provided on the air claw. The air claw is rotatably arranged on the frame through a rotating unit. The cylinder unit is used to install the cork into the bottle body in the through hole. The feeding mechanism is provided on the frame.

[0004] In existing packaging techniques, most candies are wrapped in paper wrapping to form a tube. The ends of the tube are then tightened and sealed with glue. This packaging method results in a significant amount of redundant material at the ends of the paper wrapping, resulting in significant resource waste. This not only drives up packaging costs but also reduces profit margins for manufacturers. Summary of the Invention

[0005] The object of the present invention is to provide an automatic candy packaging device to solve the problem of high cost caused by waste of paper coatings at both ends of conventional candy packaging as mentioned in the background art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic candy packaging device, including a packaging mechanism, the packaging mechanism includes a layer plate one and a layer plate two, the layer plate one is provided with a through slot one in the center, the layer plate two is provided with a through slot two in the center, a movable triangular block is provided around the through slot two, an elastic disc spring is installed at the bottom end of the layer plate one, the bottom end of the elastic disc spring is fixedly connected to a pressure triangular block, the movable triangular block and the pressure triangular block are connected by slidingly connecting an inclined plane, the bottom end of the layer plate two is fixedly connected to a support column, one side of the packaging mechanism is fixedly connected to a tray unloading plate, the upper part of the tray unloading plate is fixedly connected to a paper clothing unloading plate, and the other side of the packaging mechanism is fixedly connected to a candy The candy unloading plate and the tray unloading plate are used to transport the tray carrying the candies piece by piece into the through slot one, the paper clothing unloading plate is used to transport the paper clothing wrapped with the candies piece by piece to the upper surface of the layer plate one, the candy unloading plate is used to transport the candies piece by piece to the upper surface of the paper clothing, and the top of the packaging mechanism is provided with a stamping mechanism and a rotating clamp, the stamping mechanism includes an electric cylinder, a pressing cylinder and an avoidance groove, the output end of the electric cylinder is fixedly connected to the pressing cylinder, and the bottom end of the pressing cylinder is provided with an avoidance groove, the inner diameter of the avoidance groove is larger than the outer diameter of the candy, the stamping mechanism is used to press the candy and paper clothing into the through slot one, the paper clothing is gathered by the upper mouth of the through slot one, and the rotating clamp is used to tighten and knot the upper mouth of the paper clothing.

[0007] Preferably, support columns are fixedly connected to the four corners of the bottom end of the second layer plate, and a candy storage container is arranged below the bottom end of the second through slot.

[0008] Preferably, a suspension mechanism is provided above the packaging mechanism, the suspension mechanism comprises a suspension plate and a sliding plate, the bottom end of the suspension plate is fixedly connected to a guide rail, and the sliding plate reciprocates along the inside of the guide rail.

[0009] Preferably, the top end of the suspension mechanism is fixedly connected to a servo motor, the output end of the servo motor passes through the bottom wall of the suspension plate and is fixedly connected to a cam, and the cam overlaps one end of the sliding plate.

[0010] Preferably, the other end of the suspension plate is fixedly connected to a baffle, and a compression spring is fixedly connected between the baffle and the sliding plate.

[0011] Preferably, the punching mechanism and the rotating fixture are both mounted on the bottom surface of the sliding plate, and the reciprocating distance of the sliding plate is adapted to the distance between the punching mechanism and the rotating fixture.

[0012] Preferably, the candy packaging process is: The first step is to cut the material along the pallet blanking plate and transport the single pallet into the through slot 1; Step 2: Cut the paper garment along the paper garment cutting board and lay the single piece of paper garment flat on the upper surface of the first layer; Step 3: Cut the candy along the candy cutting plate and transport the single candy to the center of the paper wrapper; Step 4: Use the electric cylinder to push the pressing cylinder downward once to press the middle part of the paper wrapper and the candy into the inner cavity of the through groove; Step 5: The cam pushes the rotating fixture to move horizontally and align with the through slot 1. The rotating fixture is used to clamp the upper edge of the paper garment. The rotating fixture is rotated to tighten the upper edge of the paper garment and glue is applied to the knot to fix it. Step 6: The punching mechanism is reset and aligned with the through slot. The electric cylinder pushes the pressing cylinder downward for a second time, and the pressing cylinder is used to push the tray away from the movable triangular block to achieve the unloading of packaged candies and the recycling of the tray. The first to sixth steps are repeated to achieve continuous operation of the process.

[0013] Preferably, the stroke of the electric cylinder pushing the pressing cylinder to punch downward once is shorter than the stroke of the second downward punch.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention utilizes a single-seal packaging process. Through a pair of slots, the paper wrapper is restrained and gathered, and secured with a single knot using a rotating clamp. This eliminates the need for traditional double-seals or complex folding processes, reducing wrapping paper usage by over 30%. The wrapper utilizes a two-layer structure: an outer plastic layer and an inner oil-coated paper layer. The inner oil-coated paper only covers the candy contact surface, while the outer plastic layer is cut as needed, eliminating material redundancy and improving the company's economic efficiency.

[0015] 2. In this invention, the three-dimensional positioning system for the tray, paper garment, and candy unloading plates ensures precise alignment, preventing material waste caused by manual placement. The dual-stroke design of the punch mechanism, which punches and wraps once and ejects and unloads again, works in conjunction with the cam drive of the suspension mechanism to improve efficiency. The worm gear drive of the rotating fixture ensures uniform knotting force, reducing the loss of defective products.

[0016] 3. In this invention, the packaging mechanism's movable triangular block and pressure triangular block are linked by elastic disc springs, automatically clamping the pallet when it is placed and releasing it under the stamping pressure during unloading, eliminating the need for manual insertion and removal, reducing operational effort. The slots in the packaging mechanism allow for quick replacement, accommodating round and square candies of varying diameters. The secondary stamping stroke can be adjusted via the electric cylinder's parameters to accommodate pallets of varying thicknesses, expanding the device's applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of an automatic candy packaging device of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of an automatic candy packaging device of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the lower structure of a suspension mechanism in an automatic candy packaging device of the present invention; Figure 4 This is a front view of an automatic candy packaging device according to the present invention; Figure 5 This is a schematic diagram of the planar structure of the first and second layers of an automatic candy packaging device according to the present invention; Figure 6 This is a side view of an automatic candy packaging device according to the present invention; Figure 7 This is a process flow chart of unloading during packaging of an automatic candy packaging device of the present invention.

[0018] In the figure: 1. Suspension mechanism; 11. Suspension plate; 12. Guide rail; 13. Sliding plate; 14. Baffle; 15. Compression spring; 2. Servo motor; 21. Cam; 3. Packing mechanism; 31. Layer 1; 310. Through slot 1; 32. Layer 2; 320. Through slot 2; 33. Support column; 34. Elastic disc spring; 35. Movable triangular block; 36. Pressure triangular block; 4. Tray unloading plate; 41. Paper clothing unloading plate; 5. Stamping mechanism; 51. Electric cylinder; 52. Pressing cylinder; 53. Avoidance groove; 6. Rotating clamp; 7. Candy unloading plate. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] Example 1: Reference Figure 1-Figure 7As shown: A candy automatic packaging equipment includes a packaging mechanism 3, which includes a layer plate 1 31 and a layer plate 2 32. The layer plate 1 31 is provided with a through slot 1 310 in the center, and the layer plate 2 32 is provided with a through slot 2 320 in the center. A movable triangular block 35 is provided around the through slot 2 320. An elastic disc spring 34 is installed at the bottom end of the layer plate 1 31. The bottom end of the elastic disc spring 34 is fixedly connected to a pressure triangular block 36. The movable triangular block 35 and the pressure triangular block 36 are connected by sliding on an inclined plane. The bottom end of the layer plate 2 32 is fixedly connected to a support column 33. One side of the packaging mechanism 3 is fixedly connected to a tray unloading plate 4. The top of the tray unloading plate 4 is fixedly connected to a paper clothing unloading plate 41. The other side of the packaging mechanism 3 is fixedly connected to a candy unloading plate 7 The tray unloading plate 4 is used to transport the tray carrying candies one by one into the through slot 310, the paper clothing unloading plate 41 is used to transport the paper clothing wrapped with candies one by one to the upper surface of the layer plate 31, and the candy unloading plate 7 is used to transport the candies one by one to the upper surface of the paper clothing. The top of the packaging mechanism 3 is provided with a punching mechanism 5 and a rotating clamp 6. The punching mechanism 5 includes an electric cylinder 51, a pressing cylinder 52 and an avoidance groove 53. The output end of the electric cylinder 51 is fixedly connected to the pressing cylinder 52, and the bottom end of the pressing cylinder 52 is provided with an avoidance groove 53. The inner diameter of the avoidance groove 53 is larger than the outer diameter of the candy. The punching mechanism 5 is used to press the candy and paper clothing into the through slot 310. The paper clothing is gathered by the upper mouth of the through slot 310, and the rotating clamp 6 is used to tighten and knot the upper mouth of the paper clothing.

[0021] In this embodiment, the equipment is operated in a dust-free production workshop, using a semi-automatic process throughout the process. Relevant equipment is regularly inspected and disinfected to ensure food safety. The paper coat adopts a double-layer structure, the outer layer of which is supported by safe plastic to meet basic safety requirements, and the inner layer is made of oily soft paper, which is not easy for sugar to stick together, thus preventing the candy from sticking to the wrapping paper.

[0022] This equipment adopts a single-sealing packaging method. First, the tray is placed on the bottom of the layer 31 using the tray discharge plate 4, and then the paper coat is placed on the top of the layer 31 using the paper coat discharge plate 41, so that the paper coat and the tray are suspended in the air. Considering the kinetic energy of the candies rolling along the candy discharge plate 7, the placement of the candy discharge plate 7 is set so that the candies automatically fall into the middle range of the paper coat when discharged. Then, the electric cylinder 51 drives the pressing cylinder 52 to press down, so that the paper coat wraps the candies and bulges downward to form a bag-like structure. The periphery of the paper coat is limited and retracted by the through groove 310.

[0023] The pressing cylinder 52 is retracted upward, and the facing positions of the punching mechanism 5 and the rotating clamp 6 are adjusted so that the rotating clamp 6 is aligned with the paper clothes in the folded state. The rotating clamp 6 is driven by an internal motor, which drives the worm gear to rotate, and the worm gear drives the worm to rotate, thereby controlling the two clamping jaws to close and clamp the paper clothes. After the clamping jaws are in contact, the worm gear and the worm no longer rotate relative to each other, and the motor will drive the worm gear and worm to rotate as a whole, thereby driving the two clamping jaws to rotate, and the clamped part of the paper clothes is rotated and tightened to form a knot. Glue is applied to the knot, and it is fixed after air drying.

[0024] Example 2: Figure 1 、 Figure 3 、 Figure 4 and Figure 6 As shown, support columns 33 are fixedly connected at the four corners of the bottom end of the second layer 32, and a candy storage container is placed below the bottom end of the second through slot 320. A suspension mechanism 1 is provided above the packaging mechanism 3. The suspension mechanism 1 includes a suspension plate 11 and a sliding plate 13. The bottom end of the suspension plate 11 is fixedly connected to a guide rail 12, and the sliding plate 13 reciprocates along the inside of the guide rail 12. The top end of the suspension mechanism 1 is fixedly connected to a servo motor 2. The output end of the servo motor 2 passes through the bottom wall of the suspension plate 11 and is fixedly connected to a cam 21. The cam 21 overlaps with one end of the sliding plate 13. The other end of the suspension plate 11 is fixedly connected to a baffle 14, and a compression spring 15 is fixedly connected between the baffle 14 and the sliding plate 13. The stamping mechanism 5 and the rotating fixture 6 are both mounted on the bottom surface of the sliding plate 13. The reciprocating spacing of the sliding plate 13 is adapted to the spacing between the stamping mechanism 5 and the rotating fixture 6.

[0025] In this embodiment, since the candy packaging needs to first be made to sink into the tray of the through slot 1 310 to form a semi-wrapped state, and then the paper clothing is clamped and tightened around it, both sets of steps need to be operated directly above the through slot 1 310. The punching mechanism 5 and the rotating clamp 6 are both installed under the sliding plate 13. The servo motor 2 is used to drive the cam 21 to rotate periodically. The cam 21 cooperates with the compression spring 15 on the sliding plate 13 to make the sliding plate 13 reciprocate in a straight line. A reciprocating cycle is adjusted to match the working time of the punching mechanism 5 and the rotating clamp 6 so that the punching mechanism 5 and the rotating clamp 6 can complete the corresponding operation, thereby achieving the effect of position adjustment of the punching mechanism 5 and the rotating clamp 6. In order to facilitate the storage of packaged candies and the recycling of trays, a container is placed directly under the second layer plate 32. After the candies are packaged, the strong pressure of the pressing cylinder 52 is used to push the tray down, and the pressure force is used to move the movable triangular blocks 35 around the limit outward, leaving sufficient space for subsequent tray placement.

[0026] Example 3: According to Figure 7 As shown, steps one to six are repeated to achieve continuous operation of the process, wherein the candy packaging process is as follows: 1. Unload the pallet along the pallet unloading plate 4 and transport the single pallet into the through slot 1 310; 2. Cut the paper garment along the paper garment cutting plate 41 and lay the single piece of paper garment flat on the upper surface of the layer 1 31; 3. Cut the candy along the candy cutting plate 7 and transport the single candy to the center of the paper wrapper; Fourth, the electric cylinder 51 pushes the pressing cylinder 52 downward once, pressing the middle portion of the paper wrapper and the candy into the inner cavity of the through slot 1 310; Fifth, the cam 21 pushes the rotating clamp 6 to translate and align with the through slot 1 310, and the rotating clamp 6 is used to clamp the upper edge of the paper garment. The rotating clamp 6 is rotated to tighten the upper edge of the paper garment, and glue is applied to the knot to fix it; 6. The punching mechanism 5 is reset and aligned with the through slot 1 310. The electric cylinder 51 pushes the pressing cylinder 52 to punch downward for the second time. The stroke of the first downward punching by the electric cylinder 51 is lower than the stroke of the second downward punching. The pressing cylinder 52 is used to push the tray away from the movable triangular block 35 to achieve the unloading of the packaged candies and the recycling of the tray.

[0027] The candy is smaller than the avoidance groove 53 in this embodiment. When the pressing cylinder 52 is pressed down, the candy is located in the avoidance groove 53. The pressing cylinder 52 is used to push the paper clothes downward, and the electric cylinder 51 drives the pressing cylinder 52 to move above the tray. Then the electric cylinder 51 drives the pressing cylinder 52 to return. After the paper clothes are tightened and fixed by the rotating clamp 6, the electric cylinder 51 drives the pressing cylinder 52 downward again. At this time, the electric cylinder 51 drives the pressing cylinder 52 to press down a further distance, so that the tray applies pressure to the movable triangular block 35. The inclined surface of the movable triangular block 35 is used to push the pressure triangular block 36 upward until the movable triangular block 35 can smoothly pass through the candy and the tray, and the tray falls into the container below. The electric cylinder 51 drives the pressing cylinder 52 to return. The movable triangular block 35 is no longer subjected to the pressure force from the middle to the outside. The pressure triangular block 36 is pressed downward by the elastic disc spring 34 above. After the pressure triangular block 36 moves downward, it drives the movable triangular block 35 to move inward, which is convenient for the subsequent tray to be suspended.

[0028] The method of use and working principle of this device are as follows: the tray is transported to the through slot 310 of the layer 31 via the tray unloading plate 4, the paper clothes are spread flat on the upper surface of the layer 31 by the paper clothes unloading plate 41, and the candies fall to the center of the paper clothes along the candy unloading plate 7; the electric cylinder 51 drives the pressing cylinder 52 to press down once, pressing the paper clothes and candies into the through slot 310, and the paper clothes are limited by the upper mouth of the through slot 310 and retracted; the servo motor 2 drives the cam 21 to rotate, and cooperates with the compression spring 15 to make the sliding plate 13 move back and forth, rotating the clamp 6 It moves horizontally to above the through slot 1 310, and its clamping claws clamp the upper edge of the paper garment and rotate to knot and apply glue; then the pressing cylinder 52 is pressed down for the second time, with a larger stroke, the tray squeezes the inclined surface of the movable triangular block 35, pushes the pressure triangular block 36 to move upward, the movable triangular block 35 moves outward, and the tray falls into the container below, while the elastic disc spring 34 accumulates force; after the pressing cylinder 52 is reset, the elastic disc spring 34 pushes the pressure triangular block 36 to move downward, and the movable triangular block 35 retracts, completing the tray recovery, and repeating steps one to six to achieve continuous packaging.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic candy packaging device, comprising a packaging mechanism (3), characterized in that: The packaging mechanism (3) comprises a first layer (31) and a second layer (32), wherein a through slot (310) is provided at the center of the first layer (31), a through slot (320) is provided at the center of the second layer (32), a movable triangular block (35) is provided around the second through slot (320), an elastic disc spring (34) is installed at the bottom end of the first layer (31), a pressure triangular block (36) is fixedly connected to the bottom end of the elastic disc spring (34), the movable triangular block (35) and the pressure triangular block (36) are connected by sliding on an inclined plane, the bottom end of the second layer (32) is fixedly connected to a support column (33), one side of the packaging mechanism (3) is fixedly connected to a tray unloading plate (4), the upper part of the tray unloading plate (4) is fixedly connected to a paper clothing unloading plate (41), the other side of the packaging mechanism (3) is fixedly connected to a candy unloading plate (7), the tray unloading plate (4) is fixedly connected to the paper clothing unloading plate (41), and the other side of the packaging mechanism (3) is fixedly connected to a candy unloading plate (7). The tray carrying the candies is transported piece by piece to the through slot one (310); the paper coating blanking plate (41) is used to transport the paper coating wrapped with the candies piece by piece to the upper surface of the layer plate one (31); the candy blanking plate (7) is used to transport the candies piece by piece to the upper surface of the paper coating; the top of the packaging mechanism (3) is provided with a punching mechanism (5) and a rotating clamp (6); the punching mechanism (5) includes an electric cylinder (51), a pressing cylinder (52) and an avoidance groove (53); the output end of the electric cylinder (51) is fixedly connected to the pressing cylinder (52); the bottom end of the pressing cylinder (52) is provided with an avoidance groove (53); the inner diameter of the avoidance groove (53) is larger than the outer diameter of the candies; the punching mechanism (5) is used to press the candies and the paper coating into the through slot one (310); the paper coating is gathered by the upper opening of the through slot one (310); and the rotating clamp (6) is used to tighten and knot the upper opening of the paper coating.

2. The automatic candy packaging equipment according to claim 1, characterized in that: The four corner positions of the bottom end of the second layer plate (32) are all fixedly connected with support columns (33), and a candy storage container is placed below the bottom end of the second through groove (320).

3. The automatic candy packaging equipment according to claim 1, characterized in that: A suspension mechanism (1) is provided above the packaging mechanism (3). The suspension mechanism (1) comprises a suspension plate (11) and a sliding plate (13). The bottom end of the suspension plate (11) is fixedly connected to a guide rail (12), and the sliding plate (13) reciprocates along the inside of the guide rail (12).

4. The automatic candy packaging equipment according to claim 3, characterized in that: The top end of the suspension mechanism (1) is fixedly connected to a servo motor (2), the output end of the servo motor (2) passes through the bottom wall of the suspension plate (11) and is fixedly connected to a cam (21), and the cam (21) overlaps one end of the sliding plate (13).

5. The automatic candy packaging equipment according to claim 1, characterized in that: The other end of the suspension plate (11) is fixedly connected to a baffle (14), and a compression spring (15) is fixedly connected between the baffle (14) and the sliding plate (13).

6. The automatic candy packaging equipment according to claim 3, characterized in that: The punching mechanism (5) and the rotating fixture (6) are both mounted on the bottom surface of the sliding plate (13), and the reciprocating spacing of the sliding plate (13) is adapted to the spacing between the punching mechanism (5) and the rotating fixture (6).

7. The automatic candy packaging equipment according to claim 1, characterized in that: The candy packaging process is as follows: The first step is to cut the material along the pallet cutting plate (4) and transport the single pallet into the through slot 1 (310); Step 2: Cut the paper garment along the paper garment cutting plate (41) and lay the single piece of paper garment flat on the upper surface of the first layer (31); Step 3: Cut the candy along the candy cutting plate (7) and transport the single candy to the center of the paper coat; Step 4: Use the electric cylinder (51) to push the pressing cylinder (52) downward once to press the middle part of the paper coat and the candy into the inner cavity of the through groove (310); Step 5: The cam (21) pushes the rotating fixture (6) to translate and align with the through slot 1 (310), and the rotating fixture (6) is used to clamp the upper opening of the paper garment. The rotating fixture (6) is rotated to tighten the upper opening of the paper garment, and glue is applied to the knot to fix it; Step 6: The punching mechanism (5) is reset to align with the through slot 1 (310), and the electric cylinder (51) pushes the pressing cylinder (52) to punch downward for the second time, and the pressing cylinder (52) is used to push the tray away from the movable triangular block (35) to achieve the unloading of the packaged candies and the recycling of the tray; The first to sixth steps are repeated to achieve continuous operation of the process.

8. The automatic candy packaging equipment according to claim 7, characterized in that: The stroke of the electric cylinder (51) pushing the pressing cylinder (52) to punch downward once is lower than the stroke of the second punching.

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