KR102629064B1 - Apparatus for feeding electrode plate - Google Patents

Abstract

A plate feeding device having a simple structure and a gripper with stable responsiveness is provided. An electrode plate feeding device for simultaneously supplying a negative electrode plate, a positive plate, and a separator sandwiched between them, comprising two grippers arranged to face each other, each gripper having an upper jaw and a lower jaw; A first cam linked to either the upper jaw or the lower jaw; a second cam associated with the other of the upper jaw and lower jaw; A plate feeding device includes a camshaft to which the first cam and the second cam are fixed, and is configured to have a closed state in which the upper jaw and the lower jaw are in contact with each other and an open state in which the upper jaw and the lower jaw are spaced apart as the camshaft rotates.

Description

Electrode plate feeding device {APPARATUS FOR FEEDING ELECTRODE PLATE}

The present invention relates to a feeding device for supplying electrode plates in a prismatic battery cell manufacturing device, and more specifically, to a feeding device for gripping and supplying a positive plate, a negative plate, and a separator all at once.

In general, a chemical battery is a battery that consists of a pair of electrodes (positive and negative plates) and an electrolyte, and the amount of energy that can be stored varies depending on the materials that make up the electrodes and electrolyte. These chemical batteries are divided into primary batteries, which have a very slow charging reaction and are used only for one-time discharge, and secondary batteries, which can be reused through repeated charging and discharging. Recently, the use of secondary batteries has been increasing due to the advantage of being able to charge and discharge. .

Due to their advantages, secondary batteries are being applied to various technical fields across industries. They are not only widely used as an energy source for mobile communication devices such as smartphones, but are also attracting attention as an energy source for electric vehicles.

These secondary batteries are made by sequentially stacking a positive electrode plate, a separator, and a negative electrode plate and immersing them in an electrolyte solution. There are two major ways to manufacture the internal cells of such secondary batteries.

In the case of small secondary batteries, the method of placing the negative and positive plates on a separator and winding them to form a jelly-roll is often used, whereas in the case of medium to large secondary batteries with more electric capacity, the method is often used. A method of manufacturing a cathode plate and a positive plate by stacking them with a separator in an appropriate order is widely used.

In the zigzag type (also known as 'z-folding' type) stacking method, which is one of the stacking methods used to manufacture the inner cells of medium to large-sized secondary batteries, that is, prismatic secondary batteries, the separator forms a zigzag folded shape. The negative and positive plates are stacked in an alternating manner between them.

Various methods are known for supplying electrode plates and separators onto a stack table where the electrode plates are stacked.

In Patent Publication No. 10-2009-0030175 (published on March 24, 2009), the positive and negative plates placed on the cartridge are each transferred to an alignment tray by a transfer robot, aligned on the alignment tray, and then transferred to a stacking tray. When the stacking tray moves horizontally from side to side, the separator is released onto the stacking tray and covers the positive or negative plate. As this process is repeated, a separator is placed between the electrode plates, resulting in stacking of the electrode plates.

Feeder devices are known that grip positive and negative plates with a separator between them and feed them to a stack table. These feeder devices employ various methods to grip the positive plate, negative plate, and separator. Not only do they have a complex structure and require many components, but also require a lot of effort to control each component for precise operation. .

The purpose of the present invention is to provide a plate feeder with high stability even with a simple structure.

The problem to be solved by the present invention is not limited to the above problem, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

The electrode plate feeding device according to the present invention for achieving the above-described object includes the following aspects and any combination thereof.

One aspect of the present invention is an electrode plate feeding device for simultaneously supplying a negative electrode plate, a positive plate, and a separator sandwiched between them, comprising two grippers arranged to face each other, each gripper having an upper jaw and lower jaw; A first cam linked to either the upper jaw or the lower jaw; a second cam associated with the other of the upper jaw and lower jaw; It is a plate feeding device that includes a camshaft to which the first cam and the second cam are fixed, and is configured to have a closed state in which the upper jaw and the lower jaw are in contact with each other and an open state in which the upper jaw and the lower jaw are spaced apart as the camshaft rotates.

Another aspect of the present invention is a plate feeding device in which the gripper is configured to reach the open state by lowering the lower jaw and raising the upper jaw from the closed state, and further comprising a half-open state in which only the upper jaw is raised from the closed state. .

Another aspect of the invention is such that the electrode plate feeding device is arranged to move between a first position and a second position, wherein the gripper changes from the open state to the closed state when the electrode plate feeding device is in the first position, The electrode plate feeding device maintains the closed state while the electrode plate feeding device moves to the second position, and changes from the closed state to the open state after the electrode plate feeding device reaches the second position.

Another aspect of the invention is such that the electrode plate feeding device is arranged to move between a first position and a second position, wherein the gripper changes from the open state to the closed state when the electrode plate feeding device is in the first position, The electrode plate feeding device maintains the closed state while the electrode plate feeding device moves to the second position, and changes from the closed state to the half-open state after the electrode plate feeding device reaches the second position.

Another aspect of the present invention is an electrode plate feeding device adapted to change from the semi-open state to the open state while the pole plate feeding device moves from the second position to the first position, or after reaching the first position.

Another aspect of the present invention is a plate feeding device wherein the closed state and the open state are achieved by at least the profiles of the first cam and the second cam and the relative angles fixed to the cam shaft.

Another aspect of the invention is that the gripper further includes an upper follower connected to the upper jaw, and a lower follower connected to the lower jaw, wherein the first cam is connected to the lower jaw through the lower follower, and the second cam is connected to the upper jaw. An electrode plate that is connected to the upper jaw through a member and is configured so that when the gripper is in the closed state, the minimum radius part of the first cam is in contact with the lower follower and the maximum radius part of the second cam is in contact with the upper follower. It is a feeding device.

Another aspect of the present invention is a pole plate feeding device configured such that when the gripper is in the open state, the maximum radius portion of the first cam is in contact with the lower follower and the minimum radius portion of the second cam is in contact with the upper follower. am.

Another aspect of the invention is that the gripper further includes an upper follower connected to the upper jaw and a lower follower connected to the lower jaw, wherein when the gripper is in the half-open state, the minimum radius portion of the first cam is It is a pole plate feeding device configured to the lower follower so that the minimum radius portion of the second cam is in contact with the upper follower.

Another aspect of the invention is that the gripper further includes an upper follower connected to the upper jaw, and a lower follower connected to the lower jaw, wherein the first cam is connected to the lower jaw through the lower follower, and the second cam is connected to the upper jaw. It is connected to the upper jaw via a member, and when the gripper is in the closed state, the maximum radius portion of the second cam is in contact with the upper follower, while the minimum radius portion of the first cam is at a predetermined gap with the lower follower. It is a plate feeding device designed to be spaced apart by as much as possible.

Another aspect of the present invention further includes a spring for applying a compressive force so that the upper jaw and the lower jaw are closed, and when the predetermined gap occurs, a pole plate feeding device configured to firmly couple the upper jaw and the lower jaw by the compressive force of the spring. am.

According to the present invention, the number of actuators required to operate the gripper of the electrode plate feeding device can be minimized.

According to the present invention, the upper and lower jaws of the gripper of the electrode plate feeding device can be controlled in various mechanical ways, and there is no need to control the upper and lower jaws separately.

According to the present invention, the operational response of the gripper of the electrode plate feeding device is consistent and stable.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

The description below may be better understood when viewed in conjunction with the attached drawings. Components having the same reference numerals in different drawings have similar functions, so they are not repeatedly described unless necessary for understanding the invention, and well-known components are briefly described or omitted, but in the embodiments of the present invention. It should not be understood as being excluded.
Figure 1 shows a plate feeding device according to an embodiment of the present invention.
Figure 2 is a view from below of the electrode plate feeding device shown in Figure 1.
Figure 3 shows a battery cell manufacturing device centered on the electrode plate feeding device and adjacent units according to an embodiment of the present invention.
FIG. 4 is a partially enlarged view of the battery cell manufacturing apparatus shown in FIG. 3.
Figures 5a to 5c are enlarged views of one gripper portion of the electrode plate feeding device according to an embodiment of the present invention.
Figures 6a to 6c are examples of two cams applied to a pole plate feeding device, according to an embodiment of the present invention.
Figure 7 is another example of two cams applied to a plate feeding device according to another embodiment of the present invention, and sequentially shows the closing and opening operations of the gripper according to the rotation angle of the cam.
Figure 8 shows a timing chart of the cams applied as shown in Figure 7.
Figure 9 shows the operation of the cam and the corresponding operation of the gripper when the electrode plate feeding device moves between the first position and the second position, according to an embodiment of the present invention.

The present invention is not limited to the embodiments disclosed below, but may be subject to various changes and may be implemented in various different forms. Only this example is provided to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. Therefore, the present invention is not limited to the embodiments disclosed below, but substitutes or adds to the configuration of one embodiment and the configuration of another embodiment, as well as all changes and equivalents included in the technical spirit and scope of the present invention. It should be understood to include substitutes.

The attached drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed in the present specification is not limited by the attached drawings, and all changes and equivalents included in the spirit and technical scope of the present invention are not limited to the attached drawings. It should be understood to include water or substitutes. In the drawings, components may be expressed exaggeratedly large or small in size or thickness for convenience of understanding, etc., but the scope of protection of the present invention should not be construed as limited due to this.

The terms used in this specification are only used to describe specific implementations or examples, and are not intended to limit the invention. And singular expressions include plural expressions, unless the context clearly dictates otherwise. In the specification, terms such as ~include, ~consist of, etc. are intended to indicate the existence of features, numbers, steps, operations, components, parts, or a combination thereof described in the specification. That is, in the specification, terms such as ~include, ~consist of, etc. should be understood as not precluding the existence or addition possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

Terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

When a component is referred to as being "on top" or "below" another component, it should be understood that not only is it placed directly on top of the other component, but there may also be other components in between. .

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms as defined in commonly used dictionaries should be interpreted as having meanings consistent with the meanings they have in the context of the related technology, and unless clearly defined in this specification, should not be interpreted in an idealized or overly formal sense. No.

Hereinafter, the present invention will be described in detail with reference to the attached drawings.

1 and 2 show a plate feeding unit 10 according to an embodiment of the present invention. This feeding unit 10 includes two pairs of jaws (11, 12; 21, 22) capable of gripping both sides of the electrode plate 1 in order to grip the electrode plate 1 and supply it to the stack unit, and a horizontal transfer module 50 for transferring it, and a support frame 37, 47 for connecting the jaws 11, 12; 21, 22 and the horizontal movement module 50. The horizontal transfer module 50 can move toward the stack table 131 (see FIG. 4) along both guides 38 and 48 (in the direction of the arrow in FIG. 1). The pole plate feeding unit 10 can be fixed at the top by the hanger frames 39 and 49.

3 and 4 show the devices immediately preceding the electrode plate feeding unit 10 of the present invention in terms of the transfer flow of the electrode plate, that is, the positive plate supply unit 110 for delivering the positive plate, the negative plate supply unit 120 for delivering the negative plate, and the electrode plate feeding. The electrode plate stacking unit 130, which is a device immediately after the unit 10, is shown. Other units constituting the prismatic battery cell manufacturing apparatus are omitted for convenience of explanation. The positive plate supply unit 110 is configured so that when a positive plate (not shown) is placed on the positive plate alignment table 111, the alignment table 111 moves horizontally toward the feeding unit 10. The alignment table 111' represents an alignment table that has been moved to the feeding unit 10.

In the battery cell manufacturing apparatus 100 according to the present invention, a separator (not shown) may be supplied along the same path as the movement path of the positive plate alignment table 111. Specifically, the separator descends along the upper vertical space between the alignment table 111 before movement and the alignment table 111' after movement, and then bends just above the electrode surface of the alignment table 111 to form the electrode feeding unit 10. It may be configured to be supplied between the upper tank (11; 21) and the lower tank (12; 22). As a result, the separator moves onto the alignment table 111'. That is, the separator progresses between both grippers and between the upper jaw and the lower jaw.

Meanwhile, since the cathode plate supply unit 120 is configured to come down from above with the cathode plate 1, the cathode plate 1 is placed on the separator. In FIG. 2, the upper and lower groups 11 of the feeding unit 10 are used to grip the positive electrode plate placed on the positive electrode plate alignment table 111', the negative electrode plate supplied from the top to overlap the positive electrode plate, and the separator located between them. 12; 21, 22) are shown positioned on both ends of the electrode plate. The upper and lower jaws are configured to grip the anode plate at the bottom of the separator, the cathode plate at the top of the separator, and the separator all at once at this position. According to the present invention, after the upper and lower groups (11, 12; 21, 22) grip the two electrode plates and the separator, imaging can be performed to check the alignment of the electrode plates and the separator, so that this position This is called the 'alignment position' of the plate feeding unit 10, especially the upper and lower groups 11, 12; 21, 22.

After reaching the 'alignment position', the positive plate alignment table 111' may rise slightly to allow the positive plate to touch the lower part of the separator. Meanwhile, the negative plate supply unit 120 lowers the negative plate loading/unloading head 121 on the 'alignment position' and then blocks the suction force of the suction holes 122 so that the negative plate 1 is placed on top of the separator. . The alignment table 111' and the head 121 are shorter than each electrode plate and are configured to have a size that does not interfere with the gripping motion of the upper and lower groups 11, 12; 21, 22.

When the gripper of the feeding unit 10, that is, the upper and lower groups 11, 12; 21, 22, grip the electrode plates at the 'alignment position', the above-mentioned photograph is taken, and then the stack table 131 is held with the electrode plates gripped. transferred to At this time, the stopped separator is pulled and supplied in the direction of travel. When the electrode plates reach the stack table 131 together with the separator (this position is referred to as the 'stack position' of the electrode plate feeding unit 10, especially the upper and lower groups 11, 12; 21, 22), the pusher ( 132) descends to fix the electrode plates and separator. Then, the electrode plate feeding unit 10 returns to the ‘alignment position’ again. In this way, the electrode plate feeding unit 10 is configured to reciprocate between the ‘alignment position’ and the ‘stack position’.

Figures 5a to 5c show the left gripper among a pair of grippers provided in the electrode plate feeding device 10. 5A and 5B, the upper jaw 11 is fixed to the support arm 15, and the lower jaw 12 is fixed to the support arm 16. A bracket 14 may be fixed between the lower jaw 12 and the support arm 16. The upper and lower jaws 11 and 12 are configured to rise or fall by an actuator 36 such as a motor. A backlight 20 is arranged on one edge of the electrode plate 1. This is used as lighting when taking pictures with a camera to check alignment.

The support arms (15, 16) are functionally connected to the support frame (37) via cams (31, 32). Two cams (31, 32) are fixed to one camshaft (35). The support arms 15 and 16 may be compressed by springs 17a, 17b, 18a and 18b. The spring may be connected to the support arm on one side and to the support pieces 19a and 19b on the other side. Figure 5c omits some components from Figures 5a and 5b to show the mounting state of the cams 31 and 32. It can be confirmed that the cam 32 is connected to the follower 34.

6A to 6C show the shapes of cams 31 and 32 according to an embodiment of the present invention. The cam 31 is connected to the follower 33, and the cam 32 is connected to the follower 34, where the follower 33 and the follower 34 are connected to the support arm 15 and the support arm, respectively. It is coupled to (16). The cams 31 and 32 must not rotate relative to the camshaft 35, and may be provided with a keyway 40 for this purpose.

Figure 7 shows the cam operation and the resulting operation of the upper and lower jaws according to an embodiment of the present invention. In this embodiment, the shapes of the cams 31', 32', 41', and 42' are different from the previous embodiment. Reference numbers are assigned based on the cam installed in the left gripper of the plate feeding unit 10, and the cam of the corresponding right gripper is indicated in parentheses. In the drawing, the cams (31'; 41') are connected to the lower jaw (12; 22) through followers (33; 43), and the cams (32'; 42') are connected to the lower jaws (12; 22) through followers (34; 44). It is connected to the upper jaw (11; 21). Linked here means that the relevant pair is connected to operate according to the rotation of the cam.

Figures 7 (a), (b), and (c) show states rotated by 0°, 120°, and 240°, respectively, with respect to the cam 31' connected to the lower jaw 12. In this embodiment, the cams each rotate in only one direction. Since the other cam 32' is fixed to the same camshaft as the cam 31', it rotates in the same amount as the cam 31'. Therefore, the relative angle between the two cams 31' and 32' is maintained constant. In each drawing, the arrow and the dotted chain line marked with 'S' indicate the line where the separator is supplied.

In Figure 7 (a), the cam 31' associated with the lower jaw 12 is in contact with the follower 33 at its maximum radius, and the cam 32' associated with the upper jaw 11 is in contact with the follower 33 at its minimum radius. It is in contact with the follower 34 at the radius portion. At this time, the upper and lower jaws 11 and 12 rise and fall, respectively, and become open by the maximum opening height (H).

In (b) of Figure 7, the cam 32' associated with the upper jaw 11 is in contact with the follower 34 at its maximum radius, and the cam 31' associated with the lower jaw 11 is in contact with the follower 34 at its maximum radius. It is separated from the follower 33 by the gap G in the radius portion. While the upper jaw 11 is fixed in place, a spring compression force to fill the gap G is applied to the lower jaw 12, pulling the lower jaw 12 toward the upper jaw 11. As a result, the gripper is in a closed state, and the upper and lower jaws can firmly grasp the electrode plate and separator.

In (c) of FIG. 7, both the cam 31' and the cam 32' are in contact with the follower 33 and the follower 34, respectively, at the minimum radius portion. At this time, the upper tank 11 is raised to a certain height (h), while the lower tank 12 is maintained in the same position as the separator (S) without descending. This will be referred to as ‘semi-open state’.

Figure 8 shows the cam diagram of the cams shown in Figure 7, where (a) is a diagram of the cam 32' linked to the upper jaw, and (b) is a diagram of the cam 31' linked to the lower jaw. am. In the drawing, 'R' refers to the radius (in mm) around the cam determined by the profile of the cam. For example, 'R15' means that the cam radius is 15mm.

Figure 9 shows the rotation angle of the cam and the opening and closing of the gripper accordingly when the electrode plate feeding device 10 according to the present invention is in the first position ('alignment position'), the second position ('stack position'), and during feeding movement. It indicates the status.

First, in the first position, the gripper of the feeding device 10 changes from the open state to the closed state to grip the separator and the two upper and lower electrode plates. The feeding device 10 moves to the second position while maintaining its state. At this time, since the lower tank is at the same height as the separator, when entering the stacking table, it does not collide with one side of the table or the already stacked electrode plates. After the feeding device 10 reaches the second position, only the upper tank is raised and opened to release the electrode plate. If the lower jaw is lowered, it may hit the stacked plates. After releasing the electrode plate, the lower jaw is lowered during or after returning to the first position to create a fully open state.

Above, embodiments of the present invention have been described with reference to the attached drawings, but those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical idea or essential features. You will understand that it exists. Therefore, the embodiments described above should be understood as illustrative and not restrictive. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of rights of the present invention.

1: Electrode plate 10: Electrode plate feeding unit
11, 21: upper jaw 12, 22: lower jaw
13, 14, 23, 24: Bracket 15, 16, 25, 26: Support arm
17a, 17b, 18a, 18b, 27a, 27b, 28a, 28b: spring
19a, 19b, 29a, 29b: support piece 20, 30: backlight
31, 32, 41, 42, 31', 32', 41', 42' cams
33, 34, 43, 44: Follower 35, 45: Camshaft
36, 46: actuator 37, 47: support frame
38, 48: Guide 39, 49: Hanger frame
40: keyway 50: horizontal movement module
100: Battery cell manufacturing device 110: Positive plate supply unit
111, 111': positive plate alignment table 120: negative plate supply unit
121: Electrode loading/unloading head 122: Suction hole
130: Electrode plate stacking unit 131: Stack table
132: Pusher H: Opening height
h: Half-open height G: Clearance
S: Separator

Claims (11)

An electrode feeding device for simultaneously supplying a negative electrode plate, a positive plate, and a separator sandwiched between them,
It includes two grippers arranged to face each other,
Each gripper,
upper jaw and lower jaw;
A first cam linked to either the upper jaw or the lower jaw;
a second cam associated with the other of the upper jaw and lower jaw;
a camshaft to which the first cam and the second cam are fixed;
It includes a closed state in which the upper jaw and the lower jaw are in contact with each other as the camshaft rotates, and an open state in which the upper jaw and the lower jaw are spaced apart,
The gripper,
Further comprising an upper follower connected to the upper jaw, and a lower follower connected to the lower jaw,
The first cam is connected to the lower jaw through a lower follower, and the second cam is connected to the upper jaw through an upper follower,
When the gripper is in the closed state, the minimum radius portion of the first cam is in contact with the lower follower and the maximum radius portion of the second cam is in contact with the upper follower.
Electrode plate feeding device. An electrode feeding device for simultaneously supplying a negative electrode plate, a positive plate, and a separator sandwiched between them,
It includes two grippers arranged to face each other,
Each gripper,
upper jaw and lower jaw;
A first cam linked to either the upper jaw or the lower jaw;
a second cam associated with the other of the upper jaw and lower jaw;
a camshaft to which the first cam and the second cam are fixed;
It includes a closed state in which the upper jaw and the lower jaw are in contact with each other as the camshaft rotates, and an open state in which the upper jaw and the lower jaw are spaced apart,
The gripper is configured to lower the lower jaw and raise the upper jaw from the closed state to reach the open state,
It further includes a half-open state in which only the upper jaw is raised from the closed state,
The gripper,
Further comprising an upper follower connected to the upper jaw, and a lower follower connected to the lower jaw,
When the gripper is in the half-open state, the minimum radius part of the first cam is in contact with the lower follower, and the minimum radius part of the second cam is in contact with the upper follower.
Electrode plate feeding device. In claim 1,
The electrode plate feeding device is configured to move between the first position and the second position,
The gripper changes from the open state to the closed state when the pole plate feeding device is in the first position, and maintains the closed state while the pole plate feeding device moves to the second position. configured to change from the closed state to the open state after reaching
Electrode plate feeding device. In claim 2,
The electrode plate feeding device is configured to move between the first position and the second position,
The gripper changes from the open state to the closed state when the pole plate feeding device is in the first position, and maintains the closed state while the pole plate feeding device moves to the second position. configured to change from the closed state to the half-open state after reaching
Electrode plate feeding device. In claim 4,
configured to change from the half-open state to the open state while the electrode plate feeding device moves from the second position to the first position, or after reaching the first position.
Electrode plate feeding device. In claim 1,
The closed state and the open state are achieved by at least the profiles of the first cam and the second cam and a relative angle fixed to the cam shaft.
Electrode plate feeding device. delete In claim 1 or claim 2,
When the gripper is in the open state, the maximum radius portion of the first cam is in contact with the lower follower and the minimum radius portion of the second cam is in contact with the upper follower.
Electrode plate feeding device. delete An electrode feeding device for simultaneously supplying a negative electrode plate, a positive plate, and a separator sandwiched between them,
It includes two grippers arranged to face each other,
Each gripper,
upper jaw and lower jaw;
A first cam linked to either the upper jaw or the lower jaw;
a second cam associated with the other of the upper jaw and lower jaw;
a camshaft to which the first cam and the second cam are fixed;
It includes a closed state in which the upper jaw and the lower jaw are in contact with each other as the camshaft rotates, and an open state in which the upper jaw and the lower jaw are spaced apart,
The gripper,
Further comprising an upper follower connected to the upper jaw, and a lower follower connected to the lower jaw,
The first cam is connected to the lower jaw through a lower follower, and the second cam is connected to the upper jaw through an upper follower,
When the gripper is in the closed state, the maximum radius portion of the second cam is in contact with the upper follower, while the minimum radius portion of the first cam is spaced from the lower follower by a predetermined gap.
Electrode plate feeding device. In claim 10,
It further includes a spring for applying a compressive force to close the upper jaw and the lower jaw,
When the predetermined gap occurs, the upper jaw and the lower jaw are tightly coupled by the compressive force of the spring.
Electrode plate feeding device.

Images