JP6424777B2 - Cutting device and cutting method - Google Patents

Description

  The present invention relates to a cutting device and a cutting method.

  Cutting of thin materials such as films is often performed using a heated blade (see, for example, Patent Document 1). At this time, in order to obtain a good cutting quality, the object to be cut is pressed by a pressing member to which a resin member such as rubber is attached at its tip, and an appropriate tension is applied.

  The resin member at the tip of the pressing member is located closer to the object to be cut than the blade, and the blade moves against the object to be cut prior to pressing it against the object to be cut, and then the heated blade is to be cut I hit it and cut it. If the resin member at the tip of the pressing member is provided on the side of the object to be cut away from the heated blade, the heat of the blade hardly affects the resin member, and the heat of the blade causes the resin member to become the pressing member. It can prevent peeling from the tip.

JP-A-6-247100

  However, since the pressing force continues to be applied to the pressing member while the resin member at the tip of the pressing member strikes the cutting object and the blade cuts the cutting object, the distance between the resin member and the blade is large. When the time it takes for the object to hit the object to be cut is long, there is a risk that the pressing member may flex. If the holding member bends and a stable tension is not applied to the object to be cut, a cutting failure will occur.

  Then, this invention is made in order to solve such a subject, and it aims at providing the cutting device and the cutting method which hold | maintain a cutting target object stably and prevent a cutting defect.

  The cutting device of the present invention for achieving the above object is for cutting an object to be cut with a heated blade, and has a cutting member, a pressing member, a resin member, and a proximity mechanism. The cutting member is provided with the blade and performs the cutting relatively close to the object to be cut. The pressing member is biased toward the object to be cut with respect to the cutting member, and presses the object to be cut prior to the cutting. The resin member is attached to the tip of the pressing member, and is spaced apart from the blade toward the object to be cut. In the proximity mechanism, the resin member and the blade resist the biasing force that biases the pressing member before the resin member contacts the cutting object and the pressing member presses the cutting object. Keep them relatively close.

  The cutting method of the present invention for achieving the above object is a cutting method of cutting an object to be cut by a heated blade. In the cutting method according to the present invention, the pressing member is pressed from the state in which the resin member and the blade are separated by urging the pressing member with the resin member attached to the tip toward the cutting object with respect to the blade. The resin member and the blade are relatively brought close to each other while resisting the biasing force. Thereafter, in the cutting method of the present invention, the resin member is brought into contact with the object to be cut, the object to be cut is pressed by the pressing member, and the blade cuts the object to be cut in the pressed state.

  According to the cutting device and the cutting method having the above configuration, the resin member at the tip of the pressing member is provided apart from the blade and is less susceptible to heat from the blade, so the resin member is less likely to peel off from the tip of the pressing member. Furthermore, the resin member and the blade which are separated are relatively approached before the pressing member presses the object to be cut, and after the pressing member presses the object to be cut, the blade rapidly cuts the object to be cut. . For this reason, the time during which the pressing force is applied to the pressing member is short, and the pressing member is hardly bent. According to the present invention, the object to be cut can be stably pressed to prevent the cutting failure because the resin member is not easily peeled off and the pressing member is not easily bent.

It is a figure which shows schematic structure of the cutting device of 1st Embodiment. It is a flowchart of the cutting method of 1st Embodiment. It is a figure which shows the state when the cutting device of 1st Embodiment makes a blade and a resin member approach. It is a figure which shows the state when the cutting device of 1st Embodiment hold | maintains the separator which is a cutting object by the outer side holding | maintenance unit. It is a figure which shows the state when the cutting device of 1st Embodiment hold | maintains a separator with an inner side holding | maintenance unit. It is a figure which shows the state when the cutting device of 1st Embodiment cut | disconnects a separator. It is the arrow line view seen from the code | symbol 7 of FIG. It is a top view of the cut | disconnected separator. FIG. 1 is a schematic view of a battery configured using a cut-off separator. It is a figure which shows schematic structure of the cutting device of a comparative example. It is a figure which shows the state when the cutting device of a comparative example hold | suppresses a separator with an outer side holding | maintenance unit. It is a figure which shows the state when the cutting device of a comparative example hold | maintains a separator with an inner side holding | maintenance unit. It is a figure which shows the state when the cutting device of a comparative example cut | disconnects a separator. It is a figure which shows schematic structure of the cutting device of 2nd Embodiment. The cutting device of 2nd Embodiment is a figure which shows a state when a blade and a resin member are made to approach, while a separator is pressed by an outer side pressing unit. It is a figure which shows the state which the cutting device of 2nd Embodiment is moving the blade and inner side pressing unit toward a separator. It is a figure which shows the state when the cutting device of 2nd Embodiment hold | maintains a separator with an inner side holding | maintenance unit. It is a figure which shows the state when the cutting device of 2nd Embodiment cut | disconnects a separator.

  Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. The dimensional ratios in the drawings are exaggerated for the convenience of the description and are different from the actual ratios.

  As shown in FIG. 1, the cutting device 100 according to the first embodiment includes a cutting unit 110 (cutting member), an inner pressing unit 120 (pressing member), an outer pressing unit 130, and a drum 140. The cutting device 100 cuts the separator 1 (object to be cut).

  The cutting unit 110 includes a blade 111, a heater 112, an actuator 113 (proximity mechanism), and an end plate 114.

  The blade 111 is provided at the tip of the cutting unit 110 so as to face the separator 1. The heater 112 is provided inside the cutting unit 110. The blade 111 is heated by the heat conduction from the heater 112 to the blade 111. The temperature of the heater 112 is, for example, about 240 ° C., but is not limited thereto.

  The actuator 113 is, for example, a servomotor, an air cylinder or the like, but is not limited thereto.

  The end plate 114 is connected to a drive source (not shown) such as a servomotor or an air cylinder, and a drive force is applied to move the cutting unit 110 close to and away from the separator 1.

  The drive source connected to the end plate 114 and the operation of the actuator 113 are controlled by a computer such as a PC (personal computer).

  The inner pressing unit 120 is provided on the separator 1 side with respect to the end plate 114, and is connected to the end plate 114 by a spring 150 disposed between the inner pressing unit 120 and the end plate 114.

  The inner pressing unit 120 is biased toward the separator 1 by a spring 150. The elastic member that biases the inner pressing unit 120 toward the separator 1 is not limited to the spring 150, and may be another member such as a cylinder.

  The inner pressing unit 120 includes a resin member 121 at the end facing the separator 1. The resin member 121 is, for example, a rubber such as fluorine rubber or silicone rubber, but is not limited thereto, and any material other than rubber may be used as long as it is a resin material having a high heat resistance temperature.

  The resin member 121 is attached to the tip of the inner pressing unit 120 by welding, for example, but is not limited to this. For example, the resin member 121 may be attached to the tip of the inner pressing unit 120 by a thermoplastic adhesive.

  The resin member 121 is separated from the blade 111 toward the separator 1 by the biasing force of the spring 150. Although the separation distance L1 between the resin member 121 and the blade 111 is not particularly limited, it is, for example, 13 mm. The resin member 121 is preferably spaced apart from the heated blade 111 by a distance that is equal to or lower than the heat-resistant temperature.

  The outer pressing unit 130 is provided on the side of the separator 1 with respect to the end plate 114, and is connected to the end plate 114 by a spring 151 disposed between the outer pressing unit 130 and the end plate 114.

  The outer pressing unit 130 is biased toward the separator 1 by the spring 151. The elastic member that biases the outer pressing unit 130 is not limited to the spring 151, and may be another member such as a cylinder.

  The drum 140 supports the separator 1 which is an object to be cut by the outer periphery having a cylindrical shape. A groove 141 is formed in the drum 140 at a position facing the blade 111.

  Next, the cutting method of the present embodiment will be described.

  As shown in FIG. 2, the cutting method of the present embodiment includes a proximity step S10, a first pressing step S11, a second pressing step S12, and a cutting step S13.

  In the proximity step S10, as shown in FIG. 3, the blade 111 and the resin member 121 are relatively brought close to each other. More specifically, the actuator 113 moves the inner pressing unit 120 in a direction away from the separator 1 while resisting the biasing force from the spring 150, and brings the resin member 121 close to the blade 111. At this time, only the inner pressing unit 120 moves, and the positions of the cutting unit 110 and the outer pressing unit 130 do not change.

  Due to the proximity of the blade 111 and the resin member 121, the separation distance L2 therebetween is smaller than the separation distance L1 (see FIG. 1) in the standby state before the start of the operation (L1> L2). Although the separation distance L2 is not particularly limited, it is, for example, 3 mm.

  After the blade 111 and the resin member 121 approach each other to the separation distance L2, the first pressing step S11 is performed.

  In the first pressing step S11, as shown in FIG. 4, the driving force F is applied to the end plate 114, and the separator 1 is pressed by the outer pressing unit 130.

  When the driving force F is applied to the end plate 114, the outer pressing unit 130 moves toward the separator 1 together with the cutting unit 110 and the inner pressing unit 120 from the state shown in FIG. Hold down. At this time, the outer pressing unit 130, the cutting unit 110, and the inner pressing unit 120 move while maintaining the relative positional relationship shown in FIG. 3 without changing each other.

  After the outer pressing unit 130 abuts on the separator 1 as shown in FIG. 4, the driving force F is continuously applied, and the second pressing step S12 is performed.

  In the second pressing step S12, as shown in FIG. 5, the separator 1 is pressed by the inner pressing unit 120.

  The inner pressing unit 120 moves toward the separator 1 together with the cutting unit 110 from the state shown in FIG. 4 and abuts against the separator 1 with the resin member 121 to press the same. At this time, the inner pressing unit 120 and the cutting unit 110 move while maintaining the relative positional relationship between each other, while the outer pressing unit 130 does not move while holding the separator 1.

  Since the relative positional relationship between the inner pressing unit 120 and the cutting unit 110 is maintained, when the resin member 121 abuts on the separator 1, as shown in FIG. doing. Even after the resin member 121 abuts on the separator 1, the driving force F is continuously applied, and the cutting step S13 is performed.

  In the cutting step S13, as shown in FIG. 6, the separator 1 is cut by the cutting unit 110.

  From the state shown in FIG. 5, the cutting unit 110 moves the distance L2 toward the separator 1 and further moves toward the drum 140 to cut the separator 1. At this time, the inner pressing unit 120 and the outer pressing unit 130 do not move while maintaining the state in which the separator 1 is pressed. The blade 111 cuts the separator 1 and enters the groove 141.

  As shown in FIG. 7, the cutting unit 110 has two blades 111 and two heaters 112, and cuts the separator 1 at two places 1 a and 1 b by the two heated blades 111. The inner pressing unit 120 presses the separator 1 inside between the two blades 111. The outer pressing unit 130 presses the separator 1 outside the two blades 111.

  After the separator 1 is cut, the cutting unit 110, the inner pressing unit 120, and the outer pressing unit 130 are separated from the separator 1.

  As shown in FIG. 8, one of the two cut portions 1 a and 1 b of the separator 1 is linear, and the other cut portion 1 b is formed to form the convex portion 1 c.

  The separator 1 is a member for a battery, and a rectangular portion 1 d integrally formed with the convex portion 1 c is disposed between the positive electrode and the negative electrode.

  As shown in FIG. 9, the convex portion 1 c is drawn from the power generation element 1100 in which the positive electrode and the negative electrode inside the battery 1000 are stacked, and is fixed to the exterior material 1200 that seals the power generation element 1100. As a result, positional displacement of the power generation element 1100 inside the exterior material 1200 is prevented.

  Next, the operation and effect of the present embodiment will be described in comparison with a comparative example.

  As shown in FIG. 10, the cutting device 100A of the comparative example has a configuration in which the actuator 113 (proximity mechanism) is removed from the cutting device 100 of the first embodiment. About the structure common to a comparative example and 1st Embodiment, the same code | symbol is attached | subjected in the figure.

  Moreover, 100 A of cutting devices of a comparative example do not perform proximity | contact process S10 of the cutting method of 1st Embodiment, but perform 1st pressing process S11, 2nd pressing process S12, and cutting process S13.

  Therefore, as shown in FIGS. 11 and 12, the resin member 121 and the blade 111 remain separated by the distance L1, and when the separator 1 is pressed by the outer pressing unit 130 and the inner pressing unit 120, the blade 111 is Is largely separated from the separator 1.

  Therefore, as shown in FIGS. 12 and 13, the cutting unit 110 has to move the distance L1 to separate the separator 1, and the outer pressing unit 130 and the inner pressing unit 120 have a long time. , The pressing force for holding the separator 1 continues to be applied.

  Since the inner pressing unit 120 is disposed in a narrower space than the outer pressing unit 130, the skeleton supporting the pressing force is thinner than the outer pressing unit 130, and the rigidity is relatively low. For this reason, if the pressing force continues to be applied for a long time, the inner pressing unit 120 is bent, and as a result, a stable tension is not applied to the separator 1, which may cause a cutting failure.

  On the other hand, in the cutting apparatus 100 according to the present embodiment, as shown in FIG. 3, the actuator 113 (proximity mechanism) separates the resin member 121 and the blade 111 separated by a short distance before the separator 1 is pressed. Relatively close to L2.

  Therefore, as shown in FIG. 5, when the separator 1 is pressed by the resin member 121, the distance between the resin member 121 and the blade 111 is already a short separation distance L 2, and the blade 111 is used as the separator 1. It is close.

  Therefore, after the separator 1 is pressed by the resin member 121, the blade 111 can quickly reach the separator 1 to perform cutting, and the time during which a pressing force is applied to the inner pressing unit 120 is short. Therefore, the inner pressing unit 120 is less likely to bend.

  Further, as shown in FIG. 1, in the standby state before the start of the operation, the resin member 121 and the blade 111 are separated by a large distance L 1, and the resin member 121 is heated by the heater 112. It is not susceptible to heat from the blade 111. For this reason, the resin member 121 is unlikely to come off from the tip of the inner pressing unit 120.

  As described above, according to the present embodiment, since the resin member 121 does not easily come off from the inner pressing unit 120 and the inner pressing unit 120 does not bend easily, the separator 1 can be pressed stably to prevent a cutting defect.

  Further, in the present embodiment, the actuator 113 is used as a proximity mechanism between the blade 111 and the resin member 121. Since the operation of the proximity mechanism can be controlled, the blade 111 and the resin member 121 can be freely brought close to each other. Can.

  By separating the blade 111 and the resin member 121 from each other before bringing them into proximity, the resin member 121 is less susceptible to heat from the blade 111. For example, the resin member 121 is not If the distance is equal to or less than the heat resistance temperature, this becomes more remarkable, and peeling of the resin member 121 can be more effectively prevented.

Second Embodiment
As shown in FIG. 14, the cutting device 200 of the second embodiment has a proximity mechanism 213 different from the actuator 113 of the first embodiment. The cutting device 200 also has an inner pressing unit 220 different from the first embodiment. The other configuration is the same as that of the first embodiment, and the same reference numerals are assigned in the drawings, and the redundant description will be omitted.

  The proximity mechanism 213 has a stopper 213a and a spring 213b. The stopper 213 a is disposed on the opposite side to the separator 1 with respect to the inner pressing unit 220. The spring 213b biases the inner pressing unit 220 toward the stopper 213a.

  The inner pressing unit 220 is different from the inner pressing unit 120 of the first embodiment in that the inner pressing unit 220 is extended to the stopper 213 a side so as to abut on the stopper 213 a. The other configuration is the same as the inner pressing unit 120 of the first embodiment.

  The inner pressing unit 220 is biased by a spring 213b and is in contact with the stopper 213a. The stopper 213a supports the inner pressing unit 220. The stopper 213a is fixed to, for example, a support (not shown).

  As shown in FIG. 15, when the driving force F is applied to the end plate 114, the cutting unit 110 and the outer pressing unit 130 maintain the relative positional relationship with each other from the state shown in FIG. The outer pressing unit 130 presses the separator 1.

  At this time, due to the action of the proximity mechanism 213, the inner pressing unit 220 does not move as it is in the state of FIG. 14 without moving. More specifically, although the inner pressing unit 220 receives an urging force from the spring 150 toward the separator 1, the urging force larger than the spring 150 is applied to the stopper 213a by the spring 213b. Therefore, the inner pressing unit 220 does not move to the separator 1 side, and maintains the state in which the inner pressing unit 220 is in contact with the stopper 213a.

  Since the inner pressing unit 220 does not move in the state of FIG. 14 and the cutting unit 110 moves to the separator 1 side, the blade 111 and the resin member 121 relatively approach each other. As a result, the separation distance L1 between the blade 111 and the resin member 121 shown in FIG. 14 is reduced to the separation distance L2 shown in FIG. 15 (L1> L2).

  Thereafter, as shown in FIGS. 16 and 17, when the driving force F is continuously applied, the inner pressing unit 220 moves to the separator 1 side together with the cutting unit 110, and abuts on the separator 1 to press the same.

  At this time, the cutting unit 110 and the inner pressing unit 220 move from the state shown in FIG. 15 while maintaining the relative positional relationship with each other, but the outer pressing unit 130 is already in contact with the separator 1 Because it does not move. Further, since the stopper 213a is fixed and does not change its position, the inner holding unit 220 and the stopper 213a are separated as the inner holding unit 220 moves to the separator 1 side.

  Even after the inner pressing unit 220 abuts against the separator 1 and presses it, the driving force F is continuously applied.

  As a result, as shown in FIG. 18, the cutting unit 110 moves toward the drum 140 to cut the separator 1. At this time, the inner pressing unit 220 and the outer pressing unit 130 hold the separator 1 and do not move, and only the cutting unit 110 moves.

  When the inner pressing unit 220 presses the separator 1, as shown in FIG. 17, the blade 111 and the resin member 121 are already close to the short separation distance L2. Therefore, the blade 111 can be moved by a short distance from the state shown in FIG. 17 to cut the separator 1, and the time during which the pressing force is applied to the inner pressing unit 220 may be short. Therefore, the inner pressing unit 220 is not easily bent, and the separator 1 can be pressed stably to prevent the cutting failure.

  Further, in the present embodiment, since the proximity mechanism 213 brings the blade 111 and the resin member 121 into close proximity by the relatively simple configuration of the stopper 213a and the spring 213b, the cost of the apparatus can be suppressed. The effects and advantages obtained by the configuration common to the first embodiment other than the proximity mechanism 213 are the same as those of the first embodiment.

  The present invention is not limited to the embodiments described above, and can be variously modified within the scope of the claims.

  For example, the object to be cut is not limited to the separator as in the above embodiment. The present invention is applicable to the cutting of other thin materials such as thin plates and films.

  Further, as shown in FIG. 7, although two blades 111 are provided in the above embodiment, the present invention is not limited to this embodiment, but a form including only one blade and three or more blades. Including the form which it has. Also, the shape of the blade is not particularly limited.

1 Separator (object to be cut),
100 cutting devices,
100A comparative example cutting device,
110 cutting unit (cutting member),
111 blades,
112 heaters,
113 actuator (proximity mechanism),
114 end plate,
120 inner pressing unit (pressing member),
121 resin members,
130 Outer holding unit,
140 drums,
141 grooves,
150 springs,
151 spring,
200 cutting devices,
213 proximity mechanism,
213a stopper,
213b A spring that biases the inner pressing unit (pressing member) to the stopper side,
220 inner pressing unit (pressing member),
L1 separation distance between the resin member and the blade before bringing them close
L2 The separation distance between the resin member and the blade after they are brought close to each other.

Claims (5)

A cutting device for cutting an object to be cut by a heated blade, the cutting device comprising:
A cutting member provided with the blade and performing the cutting relatively close to the object to be cut;
A pressing member which is biased toward the object to be cut with respect to the cutting member and holds the object to be cut prior to the cutting;
A resin member attached to the tip of the pressing member and spaced apart from the blade toward the object to be cut;
And a proximity mechanism for relatively bringing the resin member and the blade into proximity with each other while resisting the biasing force of the pressing member.
The said proximity | contact mechanism makes the said resin member and the said blade relatively approach, before the said resin member contact | abuts on the said cutting object, and the said pressing member presses the said cutting object.   The cutting device according to claim 1, wherein the proximity mechanism comprises an actuator. The proximity mechanism includes a stopper disposed on the side opposite to the object to be cut with respect to the pressing member, and a spring biasing the pressing member toward the stopper.
The cutting device according to claim 1, wherein the spring biases the pressing member toward the stopper with a biasing force larger than the biasing force toward the object to be cut.   4. The resin member according to claim 1, wherein the resin member is attached to a tip end of the pressing member at a distance away from the blade to be heated to a temperature equal to or lower than a heat resistant temperature. Cutting device described in. A cutting method for cutting an object to be cut by a heated blade, the cutting method comprising:
A biasing force is applied to bias the pressing member from a state in which the pressing member with the resin member attached to the tip is biased toward the cutting object with respect to the blade to separate the resin member and the blade. The resin member and the blade are relatively brought close to each other, and then the resin member is brought into contact with the object to be cut, the object to be cut is pressed by the pressing member, and the blade is pressed A cutting method for cutting the object to be cut by