JP2002237289A - Terminal fitting device for flat battery, welding apparatus and method of welding terminal of flat battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal fitting device for a flat battery capable of automatically performing the terminal fitting work of the flat battery with high accuracy. SOLUTION: This terminal fitting device 1 for the flat battery is provided with a conveyor 21 provided with a chuck for gripping the flat battery, to convey the flat battery from a supply position 22 to a recovery position 25 via a first welding position 23 and a second welding position 24, a feeder 41 for taking out one flat battery and feeding the flat battery to the chuck in the supply position 22, a first terminal welding apparatus 61 for welding a terminal onto one electrode face of the flat battery in the first welding position 23, a second terminal welding apparatus 91 for welding another terminal onto the other electrode face of the flat battery in the second welding position 24 to form the battery with the terminals, and an inspection recovery machine 101 for recovering to inspect the battery with the terminals from the chuck in the recovery position 25 and then enclosing it in a container 102 for the battery with the terminals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat battery terminal attaching apparatus and a welding machine, and a method for welding flat battery terminals.

[0002]

2. Description of the Related Art Recently, a flat type battery such as a button type or a coin type is built in a power supply for memory backup in a recent electronic device. These flat batteries are usually provided with terminals for mounting on a circuit board, and the terminals are mounted on a circuit board to be built in an electronic device or the like. By the way, since there are a wide variety of electronic devices that require batteries as a backup power supply, and the types of batteries required are also various, if a flat battery with terminals is considered as one product, the number of products will be There are hundreds of types.

[0003] It is extremely difficult to automate the production process in the product field of such multi-product production. Conventionally, when a terminal is attached to a flat battery, the battery and the terminal are temporarily fixed manually by using a jig. In this state, the terminal and the battery are fixed by applying means such as spot welding by hand,
Furthermore, quality checks such as a voltage inspection and an appearance inspection were manually performed.

[0004]

However, the manual operation is not necessarily high in productivity, and further increases the cost. Therefore, there has been a strong demand for automation of the operation of attaching terminals of a flat type battery. In particular, flat batteries generally have a diameter of about several to several tens of millimeters, and the terminals to be welded to the flat batteries are much smaller, so that manual work becomes considerably complicated and the mounting of the terminals is difficult. It was also difficult to ensure the dimensional accuracy of the position.

The present invention has been made in view of the above circumstances, and is directed to a flat battery terminal attaching apparatus, a welding machine, and a flat battery terminal capable of automating a flat battery terminal attaching operation with excellent dimensional accuracy. An object of the present invention is to provide a welding method.

[0006]

In order to achieve the above object, the present invention employs the following constitution. The flat battery terminal attaching device of the present invention is a flat battery terminal attaching device for obtaining a battery with terminals by welding terminals to respective electrode surfaces of the flat battery, and a chuck for holding the flat battery. And a transporter capable of sequentially transporting the flat battery from a supply position to a recovery position via a first welding position and a second welding position, and taking out one flat battery from the flat battery group and providing the supply position A feeder for supplying the flat battery to the chuck at a first welding position, a first terminal welding machine for welding a terminal on one electrode surface of the flat battery at the first welding position, and a second welding position. A second terminal welder welding another terminal on the other electrode surface of the flat battery to form a terminal-equipped battery;
After collecting and inspecting the battery with terminals from the chuck at the collection position, the inspection and collection machine stores the battery with terminals in a battery container with terminals.

According to the flat battery terminal attaching device,
Since the flat battery is sequentially conveyed to the first welding position and the second welding position while being held by the chuck, the flat battery can be accurately positioned at the first welding position and the second welding position, It is possible to increase the dimensional accuracy of the terminal mounting position on the flat battery. Further, it becomes possible to automatically perform the supply of the flat battery, the welding of the terminal, and the inspection of the battery with the terminal.

The flat battery terminal attaching apparatus according to the present invention is the flat battery terminal attaching apparatus described above, wherein the transporter includes: a rotary table having at least one chuck; An opening / closing mechanism that allows the flat battery to be freely held by opening and closing a chuck;
A reversing mechanism for reversing the flat battery at a welding position, wherein the chuck has two arms for holding the flat battery sandwiched from the side thereof, and an arm for opening and closing the arm so as to be openable and closable. The flat battery is configured to be freely opened and closed by the opening and closing mechanism so that the flat battery can be grasped freely, and the flat battery is inverted by rotating the arm support by the reversing mechanism. It is characterized by the following.

According to such a flat battery terminal attaching device,
Since the opening and closing mechanism for opening and closing the arm of the chuck is provided, the flat battery can be freely held. In addition, since a reversing mechanism for reversing the flat battery together with the chuck is provided, the terminal is welded to one of the upwardly facing electrode surfaces by the first terminal welding machine, and then the flat battery is reversed by the reversing mechanism to face down. Since the other electrode surface is turned upward and another terminal is welded to the other electrode surface by the second terminal welding machine in this state, welding of each terminal can always be performed from the upper side of the flat type battery. It is possible to make the one terminal welder and the second terminal welder the same configuration. In addition, even if the shape of the flat battery is changed due to the change in the type of battery with terminals, it is possible to respond to the change in the type by replacing the arm with one that matches the shape and dimensions of the flat battery after the change. Become.

The flat battery terminal attaching device according to the present invention is the flat battery terminal attaching device described above, wherein the rotary table has four chucks and the supply positions corresponding to the chucks. , The first welding position, the second welding position
The welding position and the recovery position are arranged at equal intervals, and the chuck is positioned at the supply position, the first welding position, the second welding position, and the recovery position by intermittently rotating the rotary table. The processing by the feeder, the first and second terminal welding machines, and the recovery machine is performed.

According to the flat battery terminal attaching device,
As the rotary table rotates, the chucks are located at the supply position, the first and second welding positions and the collection position, and the processing by the supply machine, the first and second terminal welding machines and the collection machine is performed. Four types of processing can be performed simultaneously at the position, and the productivity of the terminal-equipped battery can be greatly improved.

Further, the flat battery terminal attaching apparatus of the present invention is the flat battery terminal attaching apparatus described above, wherein the first and second terminal welding machines each include a welding machine and a terminal supply machine. The welding machine, comprising: a welding machine main body, a head portion having at least one or more welding electrodes,
A guide rail provided on the welding machine main body for guiding the head portion from a standby position to the first or second welding position; and a first or second welding position for moving the head portion from the standby position to the first or second welding position. A drive mechanism for reciprocating the welding machine, the drive mechanism includes a drive unit, a lever supported by the welding machine body to be reciprocally rotatable by a rotating shaft, and one end of the drive unit and the lever. First to connect
A connecting rod, and a second connecting rod connecting the other end of the lever to the head, wherein the rotation axis of the lever is between the one end and the other end and the other end is The head is moved from the standby position to the first position when the one end of the lever is displaced at a constant speed from the first or second welding position to the standby position by the driving unit. Alternatively, it approaches the second welding position while decreasing its moving speed.

According to the flat battery terminal attaching device,
Since the moving speed of the head part of the welding machine decreases as it approaches the first or second welding position, it is possible to perform welding without excessively pressing the terminal against the flat battery by the welding electrode. become. When the head is reciprocated by an air cylinder or the like, the battery may be shocked and the battery may be damaged. However, in the present invention, the moving speed of the head is controlled by the driving mechanism to the first or second speed. Since it decreases as it approaches the position of the welding position, it does not give an impact to the flat battery, and a battery with terminals excellent in quality can be obtained. In particular, when projection welding is performed in which a projection is provided on the welding surface of the terminal and the terminal is joined to the battery by crushing the projection at the same time as welding, there is no possibility that the projection will be crushed by the welding electrode before welding. Welding can be performed. Further, according to the welding machine of the flat battery terminal attaching apparatus, the head section is changed by converting the movement of the driving section driven at a constant speed into the variable movement only by the combination of the driving section, the connecting rod and the lever. Because it can be driven, the head can be driven with variable speed with a simple structure with good reproducibility.
It is possible to accurately weld to a small workpiece such as a flat battery.

The flat battery terminal attaching apparatus according to the present invention is the flat battery terminal attaching apparatus described above, wherein the first and second chucks hold the flat battery.
When the head portion is located at the second welding position, the head portion approaches the flat battery while decreasing its moving speed from the standby position.

According to the flat battery terminal attaching apparatus, the head unit approaches the flat battery while holding the flat battery by the chuck, while reducing the moving speed from the standby position. Therefore, welding can be performed in a state where the flat type battery is positioned, and the accuracy of the terminal mounting position can be increased.

Further, the flat battery terminal attaching apparatus of the present invention comprises:
The flat battery terminal attaching device described above, wherein the welding machine is provided with a polishing mechanism for polishing a tip of the welding electrode.

According to the flat battery terminal attaching device, since the polishing mechanism for polishing the tip of the welding rod is provided,
Even if the tip of the welding electrode wears due to continuous spot welding and causes a problem in spot welding, the tip of the welding electrode can be automatically smoothed and always perform good spot welding. Becomes possible.

Furthermore, the flat battery terminal attaching apparatus of the present invention is the flat battery terminal attaching apparatus described above,
The terminal supply device grips and transports a terminal storage section, a selection table on which a plurality of terminals supplied from the terminal storage section are placed, and one of the plurality of terminals on the selection table. An arm, a positioning jig for holding and positioning the terminal conveyed by the arm, and a flat battery for conveying the terminal on the alignment jig to the first or second welding position; A welding jig for placing the terminal on the one or the other electrode surface of the arm, and the alignment jig is provided with a positioning surface on which the terminal is placed, and from the arm portion. An alignment pin protruding from the alignment surface toward the arm portion side is provided to guide the supplied terminal and position the terminal on the alignment surface, and the welding jig holds the terminal. Retention Electrode hole penetrating toward the head portion side from the holding surface is provided with is provided,
When the welding electrode of the welding machine is located at the first or second welding position, the welding jig moves to a position where the welding electrode can be inserted into the electrode hole.

According to the flat battery terminal attaching device,
Supply the terminal to the positioning jig to position the terminal,
After that, the terminals are transferred to the welding jig and supplied to the welding machine, so that the terminals can always be supplied in a normal posture, and the mounting direction and the mounting position of the terminals can be made accurate.

The flat battery terminal attaching device according to the present invention is the flat battery terminal attaching device described above, wherein the terminal approaches the flat battery while the terminal is held by a welding jig. Thereby, the terminal is temporarily fixed on the flat battery, and when the welding electrode is located at the first or second welding position, the welding electrode penetrates the electrode hole and fixes the flat terminal. It is characterized by being pressed against a type battery.

According to the flat battery terminal attaching device, the welding is performed by inserting the welding electrode into the electrode hole of the welding jig in a state where the terminal is temporarily fixed on the flat battery, so that the flattening is performed by the chuck and the welding jig. The terminal can be welded with the terminal temporarily fixed to the type battery, and the accuracy of the mounting position of the terminal can be increased.

The flat battery terminal attaching apparatus of the present invention is the flat battery terminal attaching apparatus described above, wherein the inspection and collection machine moves the terminal-equipped battery from the chuck at the collection position. A receiving battery collection mechanism, an inspection unit for inspecting the voltage and terminal mounting position of the battery with terminals collected by the battery collection mechanism, and a defective pallet to which the battery with terminals determined to be defective by the inspection unit is transported. And a battery container with a terminal in which the battery with a terminal determined to be non-defective by the inspection unit is stored, and a battery with one terminal selected from among the battery with a terminal determined to be non-defective by the inspection unit. And a sampling inspection pallet to be placed.

According to the flat battery terminal attaching device, one battery with terminals is selected from the group of batteries with terminals determined to be non-defective and transported to the sampling inspection pallet. It becomes possible to reduce.

The flat battery terminal attaching device according to the present invention is the flat battery terminal attaching device described above, wherein the battery with terminals is placed on the extraction pallet as follows. A control mechanism is provided for stopping the transfer device when the battery with terminals is transferred to the extraction pallet.

According to such a flat battery terminal attaching apparatus, unless the battery with terminals on the extraction pallet is removed and the sampling inspection is performed, the transporter stops at the stage when the next battery with terminals is transported. Since it is compulsory to monitor the quality of the battery with terminals at any time,
Defective products can be prevented from occurring.

Next, a welding machine according to the present invention is a welding machine for welding terminals to the surface of a flat type battery, comprising: a welding machine main body; a head having at least one or more welding electrodes; A guide rail provided on the welding machine main body for guiding from the standby position to the welding position, and a drive mechanism for reciprocating the head portion from the standby position to the welding position, the drive mechanism comprising: A driving unit, a lever supported by the welding machine body to be reciprocally rotatable by a rotating shaft, a first connecting rod connecting the driving unit and one end of the lever, the other end of the lever, and the head. And a second connecting rod connecting the first and second parts, wherein a rotating shaft of the lever is provided between the one end and the other end and closer to the other end, and one end of the lever is driven by the drive shaft. From the welding position side by the part Constant speed when it is displaced to the machine position, wherein the head portion is to close while reducing the moving velocity toward the welding position from the standby position.

According to the welding machine, since the moving speed of the head portion is reduced as the position approaches the welding position, the welding electrode can be welded without excessively pressing the terminal against the flat battery. It becomes possible to do. In addition, when the head is reciprocated by an air cylinder or the like, the battery may be shocked and the battery may be damaged. However, in the present invention, the moving speed of the head is moved closer to the welding position by the driving mechanism. Therefore, a battery with terminals having excellent quality can be obtained without giving an impact to the flat type battery. In particular, when projection welding is performed in which a projection is provided on the welding surface of the terminal and the terminal is joined to the battery by crushing the projection at the same time as welding, there is no possibility that the projection will be crushed by the welding electrode before welding. Welding can be performed. Furthermore, according to such a welding machine, the movement of the drive unit driven at a constant speed can be converted into a speed-change movement and the head unit can be speed-change driven only by the combination of the drive unit, the connecting rod, and the lever. As a result, the head portion can be driven with variable speed with good reproducibility, and it is possible to accurately weld to a small workpiece such as a flat battery.

The welding machine according to the present invention is the welding machine as described above, wherein two arms for holding the flat type battery from its side and holding the arms openably and closably at the welding position. In a state in which the chuck including the arm support is located, the head approaches the flat battery from the standby position while reducing the moving speed thereof.

According to such a welding machine, the head portion is configured so as to approach the flat type battery while holding down the flat type battery from the standby position while reducing the moving speed from the standby position. Welding can be performed in a state where the flat battery is positioned, and the accuracy of the terminal mounting position can be increased.

The welding machine according to the present invention is the welding machine as described above, wherein the terminal is approached toward the flat battery while being held by a welding jig, so that the terminal is connected to the flat battery. The welding jig is temporarily fixed on a battery, and the welding jig is provided with an electrode hole penetrating from a holding surface for holding the terminal toward the head portion side. When the head portion reaches the welding position, the welding is performed. An electrode penetrates the electrode hole to press the terminal against the flat battery.

According to such a welding machine, welding is performed by inserting the welding electrode into the electrode hole of the welding jig, so that welding can be performed while the terminal is temporarily fixed to the flat battery by the chuck and the jig. It is possible to increase the accuracy of the terminal mounting position.

The welding machine according to the present invention is the welding machine as described above, wherein the head comprises one or more rod-shaped welding electrodes and a head main body for supporting the welding electrodes. The head portion main body is provided with a split groove for gripping the welding electrode, and the welding electrode includes a gripped portion gripped by the split groove of the head portion main body and an electrode tip portion, and the gripping portion includes an electrode tip. The diameter of the portion is larger than the diameter of the electrode tip.

According to this welding machine, since the diameter of the gripped portion of the welding electrode is larger than the diameter of the tip of the electrode, the contact area between the gripped portion and the split groove is increased and the welding is performed. The electrodes can be securely held by the head body, the dimensional accuracy of the welding position of the terminal is improved, and the accuracy of the mounting position of the terminal can be increased.

A welding machine according to the present invention is the above-described welding machine, further comprising a polishing mechanism for polishing a tip of the welding electrode.

According to such a welding machine, since the polishing mechanism for polishing the tip of the welding rod is provided, the tip of the welding electrode is worn by performing the spot welding continuously, causing a problem in the spot welding. Even in this case, the tip of the welding electrode can be automatically smoothed, and good spot welding can always be performed.

The method for welding terminals of a flat type battery according to the present invention includes a head provided with at least one or more welding electrodes and a drive mechanism for reciprocating the head from a standby position to a welding position. Is a method of welding the terminal to the flat battery by a welding machine, wherein the terminal is temporarily fixed on the flat battery by a welding jig having an electrode hole,
The flat battery is supplied to the welding position of the welding machine, and the head portion is moved closer to the welding position from the standby position while decreasing its moving speed, and the welding electrode is inserted into the electrode hole, The terminal is welded to the flat battery while the terminal is pressed against the flat battery by the welding electrode.

According to the terminal welding method, since the moving speed of the head portion is reduced as the position approaches the welding position, the terminal can be welded without excessively pressing the terminal to the flat battery by the welding electrode. Will be possible.
In addition, when the head is reciprocated by an air cylinder or the like, the battery may be shocked and the battery may be damaged. However, in the present invention, the moving speed of the head is moved closer to the welding position by the driving mechanism. Therefore, a battery with terminals excellent in quality can be obtained without giving an impact to the flat type battery. In particular, when projection welding is performed in which a projection is provided on the welding surface of the terminal and the terminal is joined to the battery by crushing the projection at the same time as welding, there is no possibility that the projection will be crushed by the welding electrode before welding. Welding can be performed. According to the terminal welding method, since the welding is performed by inserting the welding electrode into the electrode hole of the jig, the welding can be performed while the terminal is temporarily fixed to the flat battery by the jig, and the terminal is attached. It is possible to increase the accuracy of the position.

[0038]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall configuration of a flat battery terminal attaching device 1 of the present invention. The flat battery terminal attaching device 1 includes a transporter 21 that transports a flat battery, a feeder 41 that supplies the flat battery to the transporter 21, and a second device that welds a terminal to one electrode surface of the flat battery. 1 terminal welding machine 61
And a second terminal welding machine 91 for welding another terminal to the other electrode surface of the flat battery to form a terminal-equipped battery, and an inspection and recovery machine 101 for inspecting the quality and the like of the obtained terminal-equipped battery. It is configured.

As shown in FIG. 1 and FIG.
Receives the flat battery from the feeder 41 at the supply position 22, and receives the received flat battery from the supply position 22 to the first welding position 23, subsequently from the first welding position 23 to the second welding position 24, Then, from the second welding position 24 to the collecting position 2
Convey to 5. Also, as shown in FIG.
Is located near the supply position 22 of the transporter 21,
One flat type battery is taken out from the supply tray 42 (flat type battery group), and the taken out flat type battery is supplied to the transfer device 21 at the supply position 22.

Further, as shown in FIG.
Numeral 1 is disposed near the first welding position 23 of the conveyor 21 and welds a terminal on the one electrode surface of the flat battery at the first welding position 23. As shown in FIG. 1, the second terminal welding machine 91 is disposed near the second welding position 24 of the transporter 21, and is separately provided on the other electrode surface of the flat battery at the second welding position 24. Weld the terminals. The terminals are welded to the respective electrode surfaces of the flat battery by the first and second terminal welders 61 and 91, respectively, to obtain a battery with terminals. Then, as shown in FIG. 1, the inspection and collection machine 101 is disposed near the collection position 25 of the transfer device 21, and after collecting and inspecting the battery with terminals from the transfer device 21 at the collection position 25, removes the battery with terminals. It is stored in the collection tray 102 (battery container with terminal).

That is, the four chucks 26 on the rotary table 27 and the supply position 2 corresponding to the chucks 26.
2, the first welding position 23, the second welding position 24, and the collecting position 25 are arranged at equal intervals, and the rotary table 27 rotates intermittently, so that each chuck 26.
2. Processing is performed by the feeder 41, the first and second terminal welders 61 and 91, and the collector 101 located at the first welding position 23, the second welding position 24, and the collecting position 25. Thus, four types of processing at each position can be performed simultaneously, and the productivity of the terminal-equipped battery can be greatly improved.

FIG. 2 shows a procedure for attaching terminals to a flat battery by the flat battery terminal attaching apparatus 1 of the present invention. As shown in FIG. 2, the flat battery 2 is a primary battery or a secondary battery such as a button type or a coin type, and the upper surface thereof is a negative electrode surface (one electrode surface) 3.
The lower surface in the figure is a positive electrode surface (the other electrode surface) 4. As shown by reference numeral A in FIG. 2, the flat battery terminal attaching device 1 of the present invention
Then, the negative electrode terminal 5 (terminal) is welded to the negative electrode surface 3 of the flat battery 2 by the first terminal welding machine 41, and then the flat battery 1 is turned over as shown by reference numeral B, and the positive electrode face 4 is At the same time, the positive electrode terminal 6 (another terminal) is welded to the positive electrode surface 4 by the second terminal welding machine 91, and a voltage inspection, an inspection of a terminal mounting position, and the like are performed by the inspection and collection machine 101 as indicated by reference numeral C. The battery with terminal 7 is obtained.

Next, FIG. 3 is a plan view of a main part of the transporter 21, FIG. 4 is a front sectional view of the transporter 21, and FIG. 5 is a side view of the main part of the transporter 21. As shown in FIGS. 3 to 5, the transfer device 21 holds the flat battery 2 by opening and closing the rotary table 27 having four chucks 26 and the chucks 26 at the supply position 22 and the recovery position 25. It comprises an opening / closing mechanism 28 that allows freedom, and a reversing mechanism 29 that reverses the flat battery 2 at the second welding position 24.

As shown in FIGS. 4 and 5, the rotary table 27 is rotatably supported by a rotary shaft 27a protruding from the transporter main body 30. The rotating shaft 27a is connected to a drive source (not shown) such as a motor in the transporter main body 30. Four chucks 26 are mounted on the rotary table 27. These chucks 26 ...
Are the supply position 22, the first welding position 23, the second welding position 2
4 and the recovery position 25 at the same time.
7a are arranged on the rotary table 27 at an angle of 90 ° with respect to each other. Also, the rotary table 27
Means that the chucks 26 are in the supply position 22 and the first welding position 2
3. It is configured to stop for a predetermined time when located at the second welding position 24 and the collecting position 25, respectively. An air tube 31 is attached to the upper end of the rotating shaft 27a.
There is provided a pipe (not shown) extending from the center of 7 to each chuck 26..., So that pressurized air can be supplied from the air tube 31 to each chuck 26 through the pipe (not shown).

As shown in FIG. 3, the chuck 26 has two arms 26a, 26a, and these arms 26a, 26a.
and an arm supporting portion 26b for supporting the opening and closing freely. The arms 26a, 26a are
7 protrudes outward from the outer peripheral end. The arms 26a, 26a are supported by an arm support 26b so as to approach or separate from each other. Further, FIG.
As shown in FIG. 7, each arm 26a has a concave portion 26a.
c, 26c are provided facing each other,
The flat battery 2 or the battery 7 with terminals can be gripped by c and 26c. Further, the recess 26c,
Reference projections 26d for positioning the flat battery 2 are provided at the lowermost end of 26c. An air cylinder (not shown) is built in the arm support portion 26b, and the arms 26a, 26a are directly connected to this air cylinder. The air is sent to the air cylinder to constantly urge the arms 26a, 26a in a closed state.

Next, as shown in FIG. 4 and FIG.
Is arranged. The opening and closing mechanism 28 includes a rotary table 27.
An opening / closing air valve 28a protruding from the lower surface of the transfer machine main body 30 toward the transfer machine main body 30 and an opening / closing projection 28c that pushes the open / close air valve 28a through the through hole 28b from inside the transfer machine main body 30 ing. An opening / closing air valve 28a is provided for each of the chucks 26.
The opening / closing projection 28c is provided only at the supply position 22 and the collection position 24. The opening / closing projection 28c is operated by an opening / closing air cylinder 28d so as to approach or separate from the opening / closing air valve 28a. The opening / closing air valve 28a is provided in the middle of the aforementioned pipe (not shown) built in the rotary table 27. When the opening / closing air valve 28a comes to the supply position 22 or the recovery position 25, the opening / closing protrusion 28c is provided. The opening / closing air valve 28a is configured to be pressed by this.

When the opening / closing projection 28c pushes the opening / closing air valve 28a when the chuck 26 is located at the supply position 22 or the collecting position 25, the opening / closing air valve 28a is opened and the air in the pipe is discharged to reduce the internal pressure. As a result, the above-described air cylinder incorporated in the arm support portion 26b operates to bring the arms 26a, 26a into an open state. The opening / closing mechanism 28 operates when the flat battery 2 is passed from the feeder 41 to the chuck 26 and when the battery 7 with the terminal is passed from the chuck 26 to the inspection and collection machine 101.
The flat batteries 2 or the batteries with terminals 7 are gripped or released by opening and closing the arms 26a, 26a.

Next, as shown in FIG. 5, a reversing mechanism 29 is disposed at the second welding position 24 of the transfer device 21. The reversing mechanism 29 includes a reversing air valve 29a protruding from the lower surface of the rotary table 27 toward the transporter main body 30;
It is constituted by a reversing projection 29c which pushes a reversing air valve 29a from the inside of the transporter body 30 through a through hole 29b. The reversing air valve 29a is provided for each of the chucks 26, and the reversing protrusion 29c is provided only at the second welding position 24. The reversing projection 29c is operated by the reversing air cylinder 29d so as to approach or separate from the reversing air valve 29a. The reversing air valve 29a is
The reversing air valve 29a is provided in the middle of another pipe (not shown) built therein. When the reversing air valve 29a reaches the second welding position 24, the reversing protrusion 29c pushes the reversing air valve 29a. It is configured.

When the chuck 26 is located at the second welding position 24, the reversing projection 29c is moved to the reversing air valve 29a.
When the is pressed, the air valve 29a for reversing is opened, the air in the above-mentioned another pipe is exhausted, and the internal pressure is reduced, whereby another air cylinder built in the arm support portion 26b is operated, and the flat type Arm 26a holding battery 2;
Flip 26a by 180 °. This reversing mechanism 29 is
It operates before welding another terminal to the positive electrode surface 4 (the other electrode surface) of the flat battery 2 by the terminal welding machine 91, and as shown by reference numerals A and B in FIG. With the positive electrode surface 4 facing upward.

According to the transfer device 21, the flat battery 2 is held at the first welding position 22 while being held by the chuck 26.
And the second welding position 23, so that the flat battery 2 can be accurately positioned at the first welding position 23 and the second welding position 24, and the dimensional accuracy of the terminal mounting position on the flat battery 2 can be improved. Can be higher. Further, according to the transfer device 21, the arm 26 of the chuck 26
Since the opening / closing mechanism 28 for opening and closing the a and 26a is provided, the flat battery 2 or the battery with terminal 7 can be freely held or released at the supply position 22 and the recovery position 25.

Also, since the reversing mechanism 29 for reversing the flat type battery 2 together with the chuck 26 is provided, the first terminal welding machine 61 welds the negative electrode terminal 5 to the negative electrode surface 3 facing upward, and then the reversing mechanism 29 Since the flat battery 2 is turned over so that the positive electrode surface 4 facing downward faces upward and the positive electrode terminal 6 is welded to the positive electrode surface 4 by the second terminal welding machine 91 in this state,
The welding of the terminals 5, 6 can always be performed from above the chuck 26. Therefore, it is not necessary to abut the positive electrode terminal 6 from below the flat battery 2 and weld the same, and the configuration of the second terminal welder 91 can be the same as that of the first terminal welder 61. Further, even when the shape and dimensions of the flat battery 2 are changed due to a change in the type of the battery with terminals 7, the arm 26a of the chuck 26 is replaced with an arm that matches the shape and size of the flat battery 2 after the change. It is possible to respond to a change in product type.

Next, as shown in FIGS. 1 and 6, the supply device 41 includes a supply tray 42 in which a number of flat batteries 2 are arranged, and one flat battery 2 from the supply tray 42. And a supply robot arm 43 for holding and transporting only.

A large number of the supply trays 42 are stacked in the standby space 44 of the supply device 41. Waiting space 4
4 has four guides 44a supporting the supply tray 42.
Are stacked up while the supply trays 42 are supported by the four guides 44a.
Also, as shown in FIG.
Is provided with a tray lift 44b below.
The supply trays 42 can be moved up and down. Further, the feeder 41 is provided with a feed rod 45, and the lowermost feed tray 42 of the stacked feed trays 42... Is pushed leftward in FIG. It can be moved to a supply space 46 provided substantially at the center.

The supply space 46 is provided with a supply robot arm 43. This supply robot arm 43
Is an x-axis slider 4 that is driven in the horizontal direction in FIG. 1 or FIG.
3a, a y-axis slider 43b directly connected to the x-axis slider 43a and driven in a direction orthogonal to the driving direction of the x-axis slider 43a, that is, a vertical direction in FIG.
, And a vacuum pad 43c attached to the base. The moving direction and the moving range of the x-axis slider 43a are regulated by the x-axis rail 43d.
The moving direction and the moving range of 3b are regulated by the y-axis rail 43e.

The vacuum pad 43c includes an x-axis slider 43a.
And the y-axis slider 43b can be freely moved in the range from the entire supply space 46 to the supply position 22 of the transporter 21. The vacuum pad 43c can be moved up and down in FIG. 6 so that it can contact the flat batteries 2 on the supply tray. Further, a suction hole (not shown) is provided at the tip of the vacuum pad 43c, and is configured so that the flat battery 2 can be sucked and held when the vacuum pad 43c contacts the flat battery 2. The flat battery 2 adsorbed by the vacuum pad 43c is transported to the supply position 22 by the supply robot arm 43, where the suction by the vacuum pad 43c is released, and is delivered to the chuck 26 of the transporter 21. The flat battery 2 is chucked by the opening / closing mechanism 28 of the transfer device 21.
The flat battery 2 is transported by the transporter 21 to the first welding position 23 in this state.

The empty supply tray 42 in which all the flat batteries 2 have been transported is pushed out by a supply rod 45 into an empty tray space 47 located on the left side of the supply space 46 in FIG. 1 or FIG. The empty tray space 47 has four guides 47a for supporting the empty supply tray 42.
… Stands upright. As shown in FIG. 6, a tray lift 47b is provided below the empty tray space 47. The empty supply tray 42 conveyed to the empty tray space 47 is lifted upward by a tray lift 47b, and is stacked along four guides 47a.

Next, as shown in FIG. 1, the first terminal welding machine 61 welds the negative electrode terminal 5 to the negative electrode surface 3 of the flat type battery 2 and comprises a welding machine 71 and a terminal feeder 62. Have been. The terminal feeder 62 is shown in FIG. 1, FIG. 7, FIG.
As shown in FIG. 7, a selection table 63 on which a plurality of negative terminals 5 are mounted, and an arm portion 65 which grips and transports one of the plurality of negative terminals 5 mounted on the selection table 63. A positioning jig 64 for holding and positioning the negative electrode terminal 5 transported by the arm portion 65; and a negative electrode surface of the flat type battery 2 by transporting the negative electrode terminal 5 on the alignment jig 64 to the first welding position 23. It mainly includes a welding jig 66 on which the negative electrode 5 is mounted on 3 and a parts feeder 67 (terminal storage section).

The parts feeder 67 has a large number of negative terminals 5.
… Is stored. A belt conveyor 67a is provided between the parts feeder 67 and the selection table 63. The belt conveyor 67a allows the negative terminals 5 ...
Is supplied from the parts feeder 67 onto the selection table 63. Negative electrode terminals 5 supplied on the selection table 63 ...
Are supplied in a random posture as shown in FIG. 8 without being particularly aligned. In the selection table 63,
For example, an image recognizing unit (not shown) including a CCD camera and a calculation unit is provided. The image recognizing unit recognizes the attitude of the negative terminal 5 supplied on the selection table 63.

Next, as shown in FIGS. 1 and 7, the arm portion 65 includes an arm base 65a, a connecting arm 65b rotatably supported by the arm base 65a, and a rotatably supported by the connecting arm 65b. The arm head 65c includes a telescopic arm 65d protruding downward in FIG. 7 from the arm head 65c, and a vacuum pad 65e attached to a lower end of the telescopic arm 65d. The vacuum pad 65e is configured to be movable in a range from the selection table 63 to the alignment jig 64 by the arm base 65a, the connecting arm and the arm 65b, and the arm head 65c. In addition, the vacuum pad 65e
7 is configured to be able to move up and down in FIG. 7 by a telescopic arm 65 d, so that the tip of the vacuum pad 65 e can contact the negative terminal 5 on the selection table 63. Further, a suction hole (not shown) is provided at the tip of the vacuum pad 65e so that when the vacuum pad 65e contacts the negative electrode terminal 5 on the selection table 63, the negative electrode terminal 5 can be sucked and held.

Next, as shown in FIG.
Is attached to the first slider 64a, and is configured to be able to move up and down in FIG. The first slider 64a is slidable with respect to the slider rail 64b.
b. The first slider 64a reciprocates the positioning jig 64 from the standby position D to the transfer position E. As shown in FIGS. 8, 9 and 10, the alignment jig 64 is provided with an alignment surface 64a on which the negative electrode terminal 5 is placed, and guides the negative electrode terminal 5 to place the negative electrode terminal 5 on the alignment surface 64a. Alignment pin 6 for positioning
4b is protruded from the positioning surface 64a toward the arm 65 side.

Further, as shown in FIG. 1, the welding jig 66 is attached to the second slider 66a, and is configured to be movable in the left-right direction in FIG. Second slider 6
6a is slidable with respect to the slider rail 66b, and its moving direction and moving range are
Regulated by: A welding jig 66 shown by a solid line in FIG.
1 indicates that the welding jig 66 indicated by the broken line in FIG. 1 is at the first welding position 23, and the second slider 66a moves the welding jig 66 from the transfer position E to the first welding position. Move back and forth to 23. FIG.
10, the welding jig 66 is provided with a holding surface 66a for holding the negative electrode terminal 5, and two electrode holes 66 penetrating upward from the holding surface 5a in the figure.
b and 66b are provided. Further, two electrode holes 66
A suction hole 66c for sucking the negative electrode terminal 5 is provided between b and 66b.

The negative electrode terminals 5 stored in the parts feeder 67 are sequentially selected by a selection table 6 by a belt conveyor 67a.
3 is supplied. Next, as shown in FIG. 8, among the plurality of negative terminals 5 supplied on the selection table 63, the selection table 63 is kept in a normal posture by the above-described image recognition means.
Only the negative electrode terminal 5 (5a) that is recognized as being mounted on is sucked and held by the vacuum pad 65e of the arm 65,
It is conveyed to the alignment jig 64. The remaining negative electrode terminals 5 (5
b) is returned to the parts feeder 67 by a belt conveyor (not shown). Even when the shape of the terminal is changed due to the change of the type, the change of the type can be easily handled only by changing the programming of the image recognition means.

Next, the negative electrode terminal 5 sucked and held by the vacuum pad 65e is moved to the positioning jig 64 at the standby position D described above.
Passed to. The negative electrode terminal 5 is dropped from above the positioning jig 64 toward the positioning surface 64a, and is placed on the positioning surface 64a while being guided and positioned by the positioning pins 64b. In addition, the alignment surface 64
It is preferable to provide a suction hole on a and hold the negative electrode terminal 5 in a state of being vacuum-sucked.

Next, as shown in FIG.
The negative electrode terminal 5 adsorbed and held by the fourth slider 4 is transported to the transfer position E by the first slider 64a. The welding jig 66 is on standby at the transfer position E, and the welding jig 66 is configured to move up and down in FIG. 9 at the transfer position. The welding jig 66 approaches the alignment jig 64 and receives the negative electrode terminal 5 from the alignment jig 64.

As shown in FIG. 10, the negative electrode terminal 5 is attracted from the positioning jig 64 to the holding surface 66 a of the welding jig 66. The negative electrode terminal 5 is suspended from the holding surface 66a in a state where the negative electrode terminal 5 is vacuum-sucked by the suction hole 66c of the welding jig 66. At this time, the bent portion 5c of the negative electrode terminal 5 is placed on the positioning jig 64 in a state facing upward in the drawing, and is held by the welding jig 66 while maintaining this posture. Then, in a state where the negative electrode terminal 5 is sucked and held by the welding jig 66,
It is conveyed from the transfer position E to the first welding position 23 by the second slider 66a.

According to the terminal supply device 62, the negative terminal 5 is supplied to the positioning jig 64 to position the negative terminal 5, and then the negative terminal 5 is delivered to the welding jig 66 and supplied to the welding machine 71. Therefore, the negative electrode terminal 5 can always be supplied to the welding machine 71 in a normal posture, and the negative electrode terminal 5 can be supplied.
The mounting direction and the mounting position can be made accurate.

In particular, since the positioning accuracy of the arm portion 65 is low, when the negative electrode terminal 5 is directly supplied from the arm portion 65 to the welding jig 66, the negative electrode terminal 5 is transferred to the welding jig 66 in an accurate posture. Is impossible and the arm 65
By providing the positioning jig 64 between the welding jig 66 and the welding jig 66, the positioning of the negative electrode terminal 5 can be performed accurately.

Next, as shown in FIGS. 11 and 12, the welding machine 71 comprises a welding machine main body 72, a head 74 provided with a welding electrode 73, and a guide rail 7 for guiding the head 74.
5 and a drive mechanism 76.

The welding machine main body 72 movably holds the head portion 74 and is provided with a head holding portion 72a erected on the rear side of the head portion 74 and a rear side of the head holding portion 72a. Base part 72b supporting head holding part 72a
It is composed of A guide rail 75 is provided on the head part 74 side of the head holding part 72a, and a rail receiving part 75a corresponding to the guide rail 75 is attached to the head part 74, and a rail receiving part 75a is provided on the guide rail 75. The head unit 74 is configured to be slidable and movable in the vertical direction in the figure. The head 74 is shown in FIG.
At 1, a reciprocating drive is performed in a vertical direction within a predetermined drive range. FIG. 11 illustrates a state in which the head unit 74 is located at the uppermost end of the drive range, and this position is referred to as a head unit standby position in the present invention. Also, FIG. 11 shows a state where the welding electrode 73 of the head portion 74 is located at the lowermost end in the drive range by a broken line, and this position is the first welding position 23. The flat battery 2 gripped and transported by the chuck 26 of the transporter 21 is positioned at the first welding position 23.

As shown in FIGS. 3 and 11, the chuck 2
The six arms 26 a, 26 a protrude outward from the outer peripheral end of the turntable 27. As shown in FIG. 17, the pair of arms 26a, 26a have recesses 26c, 26c respectively.
c are provided to face each other,
The flat battery 2 or the battery 7 with terminals can be gripped by c and 26c. Further, the recess 26c,
Reference projections 26d for positioning the flat battery 2 are provided at the lowermost end of 26c. Further, as shown in FIG.
A chuck receiving portion 23a is provided below a. The chuck receiving portion 23a is connected to the air cylinder 23b, and can move up and down in the figure.

As shown in FIGS. 11 and 13, the welding machine 71 is provided with a polishing mechanism 140 for polishing the electrode tips of the welding electrodes 73, 73. This polishing mechanism 1
40 includes a polishing arm 141, a polishing portion 142 provided at one end of the polishing arm 141, a flange 143 that rotatably supports the polishing arm 141, and a cylinder 144 that drives the polishing arm 141. . The polishing arm 141 is attached to the flange 143 so as to be rotatable about a rotation shaft 141a. The other end 141b of the polishing arm is connected to the cylinder 144.
The polishing arm 141 is configured to rotate around the rotation shaft 141a by extension of the cylinder 144, and to position the polishing portion 142 of the polishing arm 141 below the welding electrodes 73, 73. Further, the polishing arm 141 includes the cylinder 1
By repeating extension and contraction of 44, the rotation shaft 141
It is swingable about a.

When the spot welding is continuously performed, the welding electrodes 73,
In some cases, the tip of the welding member 73 may be worn to cause a problem in spot welding.
42 is located below the welding electrodes 73, 73. Then, the welding electrodes 73, 73 are lowered, and the tip end is polished to the polishing section 1.
42, and the tip of the welding electrode is polished by swinging the polishing part 142 by the cylinder 144. In this way, the electrode tip can be automatically smoothed, and good spot welding can always be performed.

Next, as shown in FIGS. 11 and 12, the head portion 74 is provided with a head support plate 76 having a rail receiving portion 75a mounted thereon and erected at a position facing the head holding portion 72a.
A power supply unit 77 attached to the head support plate 76;
Head unit main body 78 attached below power supply unit 77
And two rod-shaped welding electrodes 73, 73 supported by the head body 78. Welding electrode 7
Reference numerals 3 and 73 are made of a good conductive material such as Cu or Cu alloy, and are electrically connected to the power supply 77 via the head body 78 so that a welding current is supplied from the power supply 77 during welding. Is configured.

As shown in FIG. 14, the head main body 78 is provided with a split groove 78a for holding the welding electrode 73. The welding electrode 73 includes a gripped portion 73a and an electrode tip 73b. The diameter of the gripped portion 73a is larger than the diameter of the electrode tip 73b.
a is arranged in the split groove 78a. The head body 78 is provided with a female screw hole 78b penetrating the split groove 78a, and a male screw (not shown) is screwed into the female screw hole 78b to tighten the split groove 78a, thereby fixing the welding electrode 73.

As described above, the gripped portion 73 of the welding electrode 73
Since the diameter of “a” is larger than the diameter of the electrode tip 73 b, the contact area between the gripped portion 73 a and the split groove 78 a increases, and the welding electrode 73 can be reliably gripped by the head body 78. Accordingly, the displacement of the welding electrodes 73 and 73 does not occur, the dimensional accuracy of the welding position of the negative electrode terminal 5 as a workpiece is improved, and the accuracy of the mounting position of the negative electrode terminal 5 can be increased.

Even when the flat type battery 2 is pushed from above the chuck 26 by the welding electrodes 73, 73 during welding, the chuck 26 is supported by the lower receiving stand 23a from below, so that welding is stabilized. Can be done.

Next, as shown in FIGS. 11 and 12, the driving mechanism 76 includes a driving section 79, a lever 80 supported by the welding machine body 72 to be reciprocally rotatable by a rotating shaft 80c, and a driving section 79. A first connecting rod 81 for connecting one end 80a of the lever 80, the other end 80b of the lever 80 and a head 74
And a second connecting rod 82 for connecting.

The driving section 79 has a constant-speed reciprocating mechanism such as a piston reciprocating in a cylinder, and is driven by pneumatic or hydraulic pressure, but is preferably driven by pneumatic pressure. Further, the lever 80 is supported by the welding machine main body 72 by a rotating shaft 80c so as to be reciprocally rotatable within a predetermined angle range. Also, the rotating shaft 80c
Is also supported by a flange 83 protruding from the welding machine main body 72, as shown in FIGS. The rotation shaft 80c of the lever 80 is provided between the one end 80a and the other end 80b and closer to the other end 80b. As a result, as shown in FIG. 15, the rotation radius r1 of the other end portion 80b about the rotation shaft 80c is changed to the one end portion 80b.
Is set to be smaller than the turning radius r2.

FIG. 15A shows a state in which the head 74 is at the head standby position, and FIG.
Reference numeral 4 denotes a state at the first welding position 23. In order to move the head 74 from the head standby position to the first welding position 23, the drive unit 79 is driven to move the first connecting rod 81 upward in the drawing, that is, from the first welding position 23 to the head standby position. Displace at a constant speed in the direction. When the first connecting rod 81 is displaced upward at a constant speed, one end portion 80a of the lever 80 rotates counterclockwise by a predetermined angle around the rotation shaft 80c, and at the same time, the other end portion 80b of the lever 80 moves the rotation shaft 80c. Rotate left by a predetermined angle as the center. At this time, the trajectory of the other end portion 80b is represented by a two-dot chain line of reference numeral 80d in FIG.
It moves diagonally downward and rightward in the figure, drawing an arc of radius r2.

The head portion 74 is directly connected to the other end portion 80b of the lever 80 by the second connecting rod 82, and its moving direction is restricted only in the vertical direction in the figure by the rail receiving portion 75a and the guide rail 75. As the head 74 moves from the standby position to the first welding position 23, the moving speed gradually decreases.

As described above, only the combination of the drive unit 79, the first and second connecting rods 81 and 82, and the lever 80 converts the movement of the drive unit 79 driven at a constant speed into a variable speed movement to convert the movement of the head unit. 74 can be shifted. Thus, there is no need to provide a control mechanism for performing complicated numerical control such as a speed controller. Further, by adopting the simple structure as described above, the head portion 74 can be driven at a variable speed with high reproducibility, so that the welding process can be accurately performed on a small workpiece such as the flat battery 2. It can be carried out.

As shown in FIGS. 3 and 17, the flat battery 2 is held at the first welding position 2 in a state where it is held by the chuck 26.
3 is supplied. The flat battery 2 includes arms 26a, 26
It is fixed by being sandwiched between the concave portions 26c, 26c inside the portion a. A lower support 23a is provided at the first welding position 23 as shown in FIGS. 4, 16 and 17, and the flat battery 2 is mounted together with the chuck 26 on the lower support 23a.
a. At this time, the lower support 23a is
As shown in FIG. 7, it is separated from the arms 26a, 26a. As shown in FIGS. 16 and 17, the negative electrode terminal 5 is arranged above the flat battery 2 in a state of being suspended by a welding jig 66 of the terminal supply device 62. On the welding surface 5d of the negative electrode terminal 5, projections 5e, 5e
Is provided. In addition, the electrode hole 66b of the welding jig 66,
The position 66b corresponds to the position of the projections 5e, 5e.

To weld the negative electrode terminal 5 to the flat battery 2, first, as shown in FIGS. 17 and 18, the upper jig 66 is lowered to the chuck 26 side, and the projections 5 e of the negative electrode terminal 5 are removed.
5e is brought into contact with the negative electrode surface 3 of the flat battery 2;
The flat battery 2 is pushed down to the reference protrusions 26d, 26d. Further, the chuck receiving portion 23a is raised to
The flat battery 30 is supported together with 6a and 26a. By positioning the flat type battery 2 on the reference protrusions 26 d, 26 d, when the tips of the welding electrodes 73, 73 are located at the first welding position 23, the tips are slightly touching the negative electrode terminal 5. be able to. The flat battery 2 is the reference protrusion 2
In the state of floating from 6d, 26d, the welding electrodes 73, 73
When the flat battery 2 is pushed down to push the flat battery 2, the flat battery 2 may be tilted and the flat battery 2 may be damaged, which is not preferable. Also, reference projections 26d, 2d
If the position of 6d is low, the tip of the welding electrode does not reach and the welding may be incomplete, which is not preferable.

Then, the drive mechanism 76 of the welding machine 62 is driven to move the welding electrodes 73, 73 from the standby position to the first welding position 23. When the head portion 74 reaches the first welding position 23, the welding electrodes 73, 73 are connected to the electrode holes 66b, 66b of the welding jig 66 as shown by a two-dot chain line in FIG.
Then, the negative electrode terminal 5 is pressed against the flat battery 2 as shown in FIG.

In this state, a current is applied to the welding electrodes 73, 73 from the power supply 77 of the head 74, and the projections 5e, 5e are melted and the projections 5e, 5e are crushed. Spot welding to 2. At this time, the flat battery 2 is attached to the lower support 23 together with the arms 26a and 26a.
a, spot welding can be stably performed.

According to the welding machine 62, the moving speed of the head portion 74 decreases as it moves toward the welding position, so that when the welding electrode 73 contacts the negative electrode terminal 5, the negative electrode terminal 5 is excessively attached to the flat battery 2. Spot welding can be performed without pressing. In particular, as described above, when the projection 5e is provided on the negative electrode terminal 5 and the projection welding for joining the negative electrode terminal 5 to the flat battery 2 by crushing the projection 5e at the same time as welding is performed, the projection 5e is provided before welding. Welding electrode 7
3, there is no possibility of crushing and good welding can be performed. When the head 74 is reciprocated by an air cylinder or the like, the flat battery 2 may be damaged by impact. However, in the present invention, the moving speed of the head 74 is reduced by the driving mechanism 76. Since the speed is reduced as approaching the one welding position 23 direction, the flat battery 2 does not give an impact, and the battery 7 with terminals having excellent quality can be obtained.

Since the welding electrodes 73 and 73 are penetrated and welded to the electrode holes 66b of the welding jig 66, the welding jig 6
6, spot welding can be performed while the negative electrode terminal 5 is temporarily fixed to the flat-type battery 2, and the position of the negative electrode terminal 5 does not shift during welding, so that the accuracy of the mounting position of the negative electrode terminal 5 is improved. can do.

In FIGS. 17 to 19, the two welding electrodes 73, 73 are configured to press the projections 5e, 5e of the negative electrode terminal 5, respectively. However, the present invention is not limited to this. Further improvements may be made. That is, as shown in FIG. 20B, the diameter of the welding electrode 73 ′ is
0 (a) is set to be larger than the diameter of the welding electrode 73,
Further, the projections 5e and 5e of the negative electrode terminal 5 may be set so as to be simultaneously located within the range 73a of the welding electrode 73 ', and spot welding may be performed in this state. As a result, FIGS.
9, two welding electrodes 7 are provided for two projections 5e.
Where 3,73 was required, one welding electrode 7
The spot welding can be performed at 3 ', the welding electrode 73' can be pressed against the projections 5e, 5e with a uniform pressing force, and the welding strength at each projection 5e, 5e can be made uniform.

In the above case, the number of the welding electrodes 73 ′ is one.
Since the two welding electrodes 73, 73 can be used, it is not necessary to perform precise alignment of the welding electrodes 73, 73, which is required when the two welding electrodes 73, 73 are employed, and the adjustment of the welding machine 62 can be simplified. . Further, the range 73a of the welding electrode 73 '
Therefore, even if the terminal attachment position is changed due to a design change or the like and the position of the welding portion is changed, if the position of the new welding portion is within the above range 18a, the position of the welding electrode 73 'is changed. There is no need to adjust the position, and the adjustment of the welding machine 62 can be simplified.

Next, the positive terminal 6 (another terminal) is welded to the positive surface 4 of the flat battery 2 by the second terminal welding machine 91.
The second terminal welder 91 has the same configuration as the first terminal welder 61, and includes a welder 71 and a terminal feeder 62. Therefore, a detailed description of the configuration and the welding procedure of the second terminal welding machine 91 will be omitted.

The flat battery 2 to which the negative electrode terminal 5 has been welded by the first terminal welding machine 61 is moved from the first welding position 23 to the second welding position 24 while being held by the chuck 26 of the carrier 21. Conveyed. A reversing mechanism 29 is provided at the second welding position 24 of the transfer machine 21 as shown in FIG. become. In this state, the positive electrode terminal 6 is welded on the positive electrode surface 4 of the flat battery 2 to obtain a battery 7 with a terminal.

Next, the battery with terminals 7 is held at the second welding position 24 while being held by the chuck 26 of the transfer device 21.
To the collection position 25. As shown in FIG. 1, an inspection and collection machine 101 is provided at the collection position 25. As shown in FIG. 1, the inspection and collection machine 101 includes a battery collection mechanism 103 that receives the terminal-attached battery 7 from the chuck 26 at the collection position 25, and a voltage and terminal attachment of the terminal-attached battery 7 collected by the battery collection mechanism 103. Inspection unit 104 for inspecting the position, defective pallet 105 to which battery 7 with terminal determined to be defective by inspection unit 104 is conveyed, and terminal for storing battery 7 with terminal determined to be good by inspection unit 104 1 selected from the battery container 102 and the battery with terminal 7 determined to be non-defective by the inspection unit 104.
Extraction pallet 106 on which the battery 7 with terminals is placed
And the subject.

As shown in FIG. 1, the battery recovery mechanism 103 includes a recovery slider 103a and a recovery slider 103.
a) and a vacuum pad 103b attached to a. The recovery slider 103a is
b is transported from the collection position 25 of the transporter 21 to the inspection unit 104. The vacuum pad 103b is for holding the battery with terminal 7 by suction. The suction pad (not shown) is provided at the tip of the vacuum pad 103b, and the battery with terminal 7 is suctioned by the suction hole. At the collection position 25, the vacuum pad 103b is
When the terminal-equipped battery 7 is received from the carrier 6, the opening / closing mechanism 28 provided in the transporter 21 is operated to open the arms 26a, 26a of the chuck 26, the grip of the terminal-equipped battery 7 is released, and the vacuum pad 103b The battery with terminal 7 is delivered.

Next, the inspection section 104 comprises a disk-shaped inspection rotary table 107, a voltage inspection machine 108, and a dimension inspection machine 10
9. The voltage inspection machine 108 and the dimension inspection machine 109 are arranged along the outer periphery of the inspection turntable 107. The voltage inspection machine 108 is located upstream in the rotation direction of the inspection turntable 107, and the dimension inspection machine 109 is located downstream in the rotation direction. Located on the side.

On the outermost periphery of the upper surface of the inspection rotary table 107, four inspection jigs 107a are arranged at regular intervals. The inspection rotary table 107 is driven to rotate by a drive source (not shown), and the inspection jig 107 a
... is the voltage inspection position and dimension inspection machine 1 of the voltage inspection machine 108
It moves to the dimension inspection position 09, respectively. The inspection rotary table 107 is disposed adjacent to the recovery slider 103a of the battery recovery mechanism 103, and receives the terminal-attached battery 7 sucked and held by the vacuum pad 103b from the vacuum pad 103b to the inspection jig 107a. You can pass it.

As shown in FIG. 21, the voltage testing machine 108 includes a voltage testing machine main body 108a and a rotating table 1 for testing.
07, an upper rail 108b attached to the voltage testing machine main body 108a, and a lower rail 108c located below the inspection turntable 107 and attached to the voltage testing machine main body 108a;
b, upper slider 108d slidably mounted on
A lower slider 108e slidably attached to the lower rail 108c; an upper voltage electrode 108f attached to the upper slider 108d;
e and a lower voltage electrode 108g attached to the lower electrode e.

Upper and lower sliders 108d, 108e
Are slid vertically with respect to the upper and lower rails 108d and 108e in the figure, and when the battery 7 with terminals is supplied to the voltage test position 107c by the test turntable 107, the upper and lower voltage electrodes 108f and 108 g is brought into contact with the terminal-equipped battery 7 from above and below. Upper voltage electrode 10
Reference numeral 8f contacts the negative terminal 5 of the battery 7 with a terminal, and the lower voltage electrode 108g passes through the through hole 107b provided at the lower part of the inspection jig 107a, and the positive electrode 6 of the battery 7 with the terminal.
Contact In this state, the voltage of the battery with terminal 7 is measured. When the measured voltage satisfies the reference value, the flat battery 2 and the negative electrode and the positive electrode terminals 5 and 6 are welded favorably, and it is determined that the welded product has sufficient welding strength. If the measured voltage does not satisfy the reference value, the welding is determined to be defective and the welding is determined to be defective. The battery 7 with terminals after inspection is sent to the dimension inspection machine 109 by the inspection turntable 107.

As shown in FIG. 22, the dimension inspection machine 109 includes a dimension inspection machine body 109a and a dimension inspection machine body 109.
a camera fixing arm 109b attached to the upper end of a
An inspection camera 109c attached to the camera fixing arm 109b; and a ring-shaped illumination device 1 located between the inspection camera 109c and the inspection rotary table 107.
09e and the illuminating device 109e.
And an illumination fixing arm 109d to be fixed to the light source.

The inspection camera 109c is connected to image recognition means built in the dimension inspection machine main body 109a.
The battery with terminal 7 is photographed while looking down from above, and the mounting positions of the negative and positive terminals 5 and 6 of the battery with terminal 7 are inspected. The lighting device 109e illuminates the battery 7 with terminals. If the mounting positions of the negative and positive terminals 5, 6 are within the range of the reference position as a result of the photographing,
The mounting positions of the negative electrode and the positive electrode terminals 5 and 6 are determined to be normal dimensional non-defective products. If the mounting position is out of the range of the reference position, the mounting position is determined to be an abnormally defective product.

In addition, the inspection and recovery machine 101 has the configuration shown in FIGS.
As shown in FIG. 3 and FIG. 24, the battery with terminal 7 determined as a non-defective or defective product by the inspection unit 104 is stored in the collection tray 10.
2. Defective pallet 105 or sampling pallet 1
A sorting robot arm 110 is provided for transporting the robot to a sorting robot arm 06. This sorting robot arm 110 is the same as that shown in FIG.
3. An x-axis slider 110a that is driven in the left-right direction in the middle, and an x-axis slider 110 that is directly connected to the x-axis slider 110a.
It is composed of a y-axis slider 110b which is driven in a direction perpendicular to the driving direction of a, that is, a vertical direction in FIG. 1 or FIG. 23, and a vacuum pad 110c attached to the x-axis slider 110a. The vacuum pad 110c is the x-axis slider 1
10a and the inspection unit 104 by the y-axis slider 110b.
The range from the inspection rotary table 107 to the collection tray 102, the defective pallet 105, and the extraction pallet 106 can be freely moved.

The vacuum pad 110c is configured so as to be able to move up and down in FIG. 24, and can be freely lowered to a position where the vacuum pad 110c comes into contact with the inspected terminal-equipped battery 7 on the inspection rotary table 107. It has been. Further, a suction hole (not shown) is provided at the tip of the vacuum pad 110c so that when the vacuum pad 110c contacts the battery 7 with a terminal, the battery 7 with a terminal can be sucked and held. The battery with terminals 7 sucked and held on the vacuum pad 110c is transported by the sorting robot arm 110 to the collection tray 102, the defective pallet 105 or the extraction pallet 106, and the vacuum pad 110
The suction by c is released and the product is placed on the collection tray 102, the defective pallet 105 or the extraction pallet 106.

In the inspection unit 104, the battery with terminal 7 which is determined to be a good welded product and a good dimension is finally determined to be a good product and is conveyed to the collection tray 102. Then, a part of non-defective products (for example, one in 1,000) is conveyed to the extraction pallet 106. In addition, the terminal-equipped battery 7 determined to be a defective welding product by the voltage testing machine 108 of the testing unit 104
Is transported by the sorting robot arm 110 to the defective welding tray 105a of the defective pallet 105. Further, the battery with terminal 7 determined to be a defective product by the dimension inspection device 109 of the inspection unit 104 is the sorting robot arm 1
10 transports the defective product pallet 105 to the defective product tray 105b.

The extraction pallet 106 allows only one battery 7 with terminals to be placed thereon, and does not allow two or more batteries 7 with terminals to be placed thereon. After the battery 7 with the terminal conveyed to the extraction pallet 106 is collected by an operator, the battery 7 is subjected to a sampling inspection such as a tensile strength test for confirming a welding strength between the flat battery 2 and the negative and positive electrodes 5 and 6. Provided. In the flat battery terminal attaching device 1 of the present invention, when the next battery 7 with terminals is transported to the extraction pallet 106 while the battery 7 with terminals is placed on the extraction pallet 106, A control mechanism for stopping the machine 21 is provided. Whether or not the battery with terminal 7 is left on the extraction pallet 106 is detected by, for example, a sensor or the like. Therefore, when the operator forgets to collect the battery with terminals 7 from the sampling pallet 106, the transporter 21 is automatically stopped by the above-described control mechanism. Monitoring is forced, and the occurrence of defective products can be prevented.

The collection tray 102 filled with batteries 7 with terminals by the selection robot arm 110
Alternatively, it is pushed out into the stacking space 112 by the collection rod 111 shown in FIG. The stacking pace 112 has two guides 112 a supporting the collection tray 102.
… Stands upright. A tray lift 112b is provided below the stacking space 112. Fully loaded collection tray 10 transported to the stacking space 112
2 are lifted upward by the tray lift 112b, and are stacked along the two guides 112a.

According to the inspection and recovery machine 101, one of the batteries 7 with terminals is selected from among the batteries 7 with terminals determined to be non-defective.
Is selected and conveyed to the sampling pallet 106, so that the labor for the sampling inspection can be greatly reduced.

In addition, the inspection unit 104 discriminates a non-defective product from a defective product, and separates and conveys the defective product to the collection tray 102 or the defective product pallet 105. Therefore, there is no trouble in selecting the defective product, and a large labor saving can be realized. .

[0107]

As described above in detail, according to the flat battery terminal attaching device of the present invention, the flat battery is moved to the first welding position and the second welding position while holding the flat battery with the chuck. Since the batteries are sequentially transported, the flat battery can be accurately positioned at the first welding position and the second welding position, and the dimensional accuracy of the terminal mounting position on the flat battery can be increased. Further, the supply of the flat battery, the welding of the terminals, and the inspection of the battery with terminals can all be performed automatically.

According to the flat battery terminal attaching apparatus of the present invention, since the opening / closing mechanism for opening / closing the arm of the chuck is provided, the flat battery can be gripped freely. In addition, since a reversing mechanism for reversing the flat battery together with the chuck is provided, the terminal is welded to one of the upwardly facing electrode surfaces by the first terminal welding machine, and then the flat battery is reversed by the reversing mechanism to face down. Since the other electrode surface is turned upward and another terminal is welded to the other electrode surface by the second terminal welding machine in this state, welding of each terminal can always be performed from the upper side of the flat type battery. The one terminal welder and the second terminal welder can have the same configuration. Further, even when the shape and dimensions of the flat battery are changed due to a change in the type of the battery with terminals, it is possible to cope with the change in the type by replacing the arm with a shape and size suitable for the changed flat battery.

Further, according to the flat-type battery terminal attaching apparatus of the present invention, the moving speed of the head portion of the welding machine decreases as it approaches the first or second welding position. The terminal can be welded by the welding electrode without excessively pressing the flat battery. In particular, when projection welding is performed in which a projection is provided on the welding surface of the terminal and the terminal is joined to the battery by crushing the projection at the same time as welding, there is no possibility that the projection will be crushed by the welding electrode before welding. Welding can be performed. Further, according to the welding machine of the flat battery terminal attaching apparatus, the head section is changed by converting the movement of the driving section driven at a constant speed into the variable movement only by the combination of the driving section, the connecting rod and the lever. Since the head can be driven, the head can be driven with variable speed with good reproducibility with a simple structure, and can be accurately welded to a small workpiece such as a flat battery.

Further, according to the flat battery terminal attaching apparatus of the present invention, the terminals are supplied to the positioning jig to position the terminals, and then the terminals are transferred to the welding jig and supplied to the welding machine. Terminals can always be supplied in a normal posture, and the terminal mounting direction and position can be made accurate.

Further, according to the flat battery terminal attaching apparatus of the present invention, one of the battery group with terminals determined to be non-defective is selected.
Since the battery with terminals is selected and transported to the sampling inspection pallet, the time required for the sampling inspection can be greatly reduced.

According to the flat-type battery terminal attaching apparatus of the present invention, unless the battery with terminals on the extraction pallet is removed and the sample is inspected, the transporter is stopped at the stage when the next battery with terminals is transported. Since the control mechanism is provided, it is compulsory to carry out sampling inspection as needed to constantly monitor the quality of the battery with terminals, thereby preventing occurrence of defective products.

[Brief description of the drawings]

FIG. 1 is a plan view showing a flat battery terminal attaching device according to an embodiment of the present invention.

FIG. 2 is a process diagram showing a procedure for obtaining a battery with terminals by attaching terminals to a flat battery.

FIG. 3 is a plan view showing a main part of a transporter provided in the flat battery terminal attaching device according to the embodiment of the present invention.

FIG. 4 is a front sectional view of a transporter provided in the flat battery terminal attaching device according to the embodiment of the present invention.

FIG. 5 is a side view of a main part of a transporter provided in the flat battery terminal attaching device according to the embodiment of the present invention.

FIG. 6 is a front view of a feeder provided in the flat battery terminal attaching device according to the embodiment of the present invention.

FIG. 7 is a side view showing an arm portion of a terminal supply device provided in the flat battery terminal attaching device according to the embodiment of the present invention.

FIG. 8 is a schematic diagram for explaining an operation of a terminal welding machine provided in the flat battery terminal attaching device according to the embodiment of the present invention.

FIG. 9 is a schematic diagram for explaining the operation of the terminal welding machine provided in the flat battery terminal attaching device according to the embodiment of the present invention.

FIG. 10 is a perspective view showing a positioning jig and a welding jig of the terminal welding machine provided in the flat battery terminal attaching device according to the embodiment of the present invention.

FIG. 11 is a front view of a welding machine provided in the flat battery terminal attaching device according to the embodiment of the present invention.

FIG. 12 is a side view of a welding machine provided in the flat battery terminal attaching device according to the embodiment of the present invention.

FIG. 13 is a plan view of a welding machine provided in the flat battery terminal attaching device according to the embodiment of the present invention.

FIG. 14 is a view showing a main part of a head part of a welding machine provided in the flat battery terminal attaching device according to the embodiment of the present invention, wherein (a) is a plan view showing a head part main body. And (b) is a front view showing the head section main body.

FIG. 15 is a view for explaining the operation of the drive mechanism of the welding machine provided in the flat-type battery terminal attaching device according to the embodiment of the present invention, wherein FIG. It is a schematic diagram which shows a state, (b) is a schematic diagram which shows the state in which a head part is in a welding position.

FIG. 16 is a perspective view showing a main part of a welding machine provided in the flat battery terminal attaching device according to the embodiment of the present invention.

FIG. 17 is a schematic cross-sectional view showing a relationship among a flat battery, a chuck, a negative electrode terminal, and a welding jig in a welding machine according to an embodiment of the present invention.

FIG. 18 is a schematic diagram for explaining the operation of the welding machine according to the embodiment of the present invention.

FIG. 19 is a schematic view for explaining the operation of the welding machine according to the embodiment of the present invention.

FIG. 20 is a view for explaining a positional relationship between a welding electrode, a flat battery, and a terminal of a welding machine according to an embodiment of the present invention, wherein (a) shows a case where there are two welding electrodes; It is a plane schematic diagram, (b) is a plane schematic diagram which shows the case where there is one welding electrode.

FIG. 21 is a side view of a voltage testing machine provided in the testing and collecting machine of the flat battery terminal attaching device according to the embodiment of the present invention.

FIG. 22 is a side view of a dimension inspection machine provided in the inspection and recovery machine of the flat battery terminal attaching device according to the embodiment of the present invention.

FIG. 23 is a plan view of a main part of an inspection and collection machine of the flat battery terminal attaching device according to the embodiment of the present invention.

FIG. 24 is a front view of a main part of an inspection and recovery machine of the flat battery terminal attaching device according to the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Flat battery terminal attaching device, 2 ... Flat battery, 3 ...
Negative electrode surface (one electrode surface), 4 ... Positive electrode surface (the other electrode surface), 5 ... Negative electrode terminal (terminal), 6 ... Positive electrode terminal (another terminal), 7 ... Battery with terminal, 21 ... Transporter, 22 ... supply position, 23 ... first welding position (welding position), 24 ... second welding position (welding position), 25 ... collection position, 26 ... chuck,
26a: arm, 26b: arm support portion, 27: rotary table, 28: opening / closing mechanism, 29: reversing mechanism, 41: feeding machine, 42: feeding tray (flat battery group), 61: first
Terminal welding machine, 62 ... Terminal feeder, 63 ... Selection table,
64: positioning jig, 64a: positioning surface, 64b: positioning pin, 65: arm, 66: welding jig, 66a
... holding surface, 66b ... electrode hole, 67 ... parts feeder (terminal storage section), 71 ... welding machine, 72 ... welding machine body, 73 ...
Welding electrode 74 head part 75 guide rail 76
... Driving mechanism, 79 ... Drive part, 80 ... Lever, 80a ... One end, 80b ... Other end, 80c ... Rotating shaft, 81 ... First connecting rod, 82 ... Second connecting rod, 91 ... Second terminal welding machine , 10
DESCRIPTION OF SYMBOLS 1 ... Inspection collection machine, 102 ... Collection tray (battery container with a terminal), 103 ... Battery collection mechanism, 104 ... Inspection part, 105
... Defective pallets, 106 ... Pallet

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshio Komura 135 Akamachi Ko, Komatsu City, Ishikawa Prefecture Inside Komatsu Electronics Co., Ltd. (72) Inventor Tosumi Sano 1006 Kazuma Oaza, Kadoma, Osaka Prefecture ) Inventor Morio Hamaguchi 22-8 Higashida-cho, Kadoma-shi, Osaka F-term in ETB International Technology Center Co., Ltd. 4E065 CA02 CA05 CB05 EA04 5H022 AA00 BB05 BB11 BB19 BB21 BB27 BB28 CC02 CC09 CC30

Claims (16)

[Claims] 1. A flat-type battery terminal attaching device for obtaining a battery with terminals by welding terminals to respective electrode surfaces of the flat-type battery, the flat-type battery including a chuck for gripping the flat-type battery. A transporter capable of sequentially transporting batteries from a supply position to a recovery position via a first welding position and a second welding position, and taking out one flat battery from the flat battery group and placing the flat battery on the chuck at the supply position. A supply device for supplying a battery, a first terminal welder for welding a terminal on one electrode surface of the flat battery at the first welding position, and a first terminal welding machine for welding the flat battery at the second welding position. A second terminal welding machine for welding another terminal to the other electrode surface to form a battery with a terminal; and collecting and inspecting the battery with the terminal from the chuck at the collection position and then connecting the battery with the terminal to the terminal. Inspection and collection machine stored in a battery container with Flat battery terminal with apparatus characterized by being provided. 2. The method according to claim 1, wherein the transporter includes a rotary table having at least one chuck, an opening / closing mechanism configured to open and close the chuck to freely grip the flat battery, and a second welding position. A reversing mechanism for reversing the flat battery, wherein the chuck comprises two arms for holding the flat battery by sandwiching the flat battery from a side thereof, and an arm supporting portion for opening and closing the arm. The flat battery can be gripped freely by opening and closing the two arms by the opening and closing mechanism, and the flat battery is inverted by rotating the arm support by the reversing mechanism. The terminal device for a flat battery according to claim 1. 3. The rotating table, wherein four chucks and the supply position corresponding to the chucks,
The welding position, the second welding position, and the collecting position are arranged at equal intervals, and the rotary table is intermittently rotated, so that the chucks are in the supply position, the first welding position, and the second welding position. 3. The processing performed by the feeder, the first and second terminal welders, and the recovery machine at a recovery position.
4. The terminal device for a flat battery according to claim 1. 4. The first and second terminal welding machines each include a welding machine and a terminal feeder, and the welding machine includes a welding machine main body and a head including at least one or more welding electrodes. Part, a guide rail provided on the welding machine body for guiding the head part from the standby position to the first or the second welding position, and the first or the second part from the standby position. A drive mechanism for reciprocating the welding unit, the drive mechanism comprising: a drive unit; a lever supported by the welding machine body to be reciprocally rotatable by a rotating shaft; A first connecting rod for connecting one end, and a second connecting rod for connecting the other end of the lever to the head, wherein the rotation axis of the lever is between the one end and the other end. And provided near the other end. When one end of the lever is displaced at a constant speed from the first or second welding position side to the standby position side by the driving unit, the head unit is moved from the standby position to the first or second welding position. 4. The flat battery terminal attaching device according to claim 1, wherein the device approaches the welding position while decreasing its moving speed. 5. The flat-type battery while the head unit reduces its moving speed from the standby position when the chuck is positioned at the first and second welding positions while holding the flat-type battery. The flat battery terminal attaching device according to any one of claims 1 to 4, wherein the device is approached toward the terminal. 6. The flat battery terminal attaching device according to claim 4, wherein the welding machine is provided with a polishing mechanism for polishing a tip of the welding electrode. 7. The terminal supply device includes a terminal storage unit, a selection table on which a plurality of terminals supplied from the terminal storage unit are placed, and one of the plurality of terminals on the selection table. An arm for gripping and transferring, a positioning jig for holding and positioning the terminal transferred by the arm, and transferring the terminal on the positioning jig to the first or second welding position. And a welding jig for placing the terminal on the one or other electrode surface of the flat battery. The positioning jig is provided with a positioning surface on which the terminal is placed. An alignment pin projecting from the alignment surface toward the arm portion side is provided for guiding the terminal supplied from the arm portion and positioning the terminal on the alignment surface. The terminal A holding surface for holding is provided and an electrode hole penetrating from the holding surface toward the head portion side is provided, and the electrode is provided when the welding electrode of the welding machine is located at the first or second welding position. The flat battery terminal attaching device according to any one of claims 1 to 6, wherein the welding jig moves to a position where the welding electrode can be inserted into the hole. 8. The terminal is temporarily fixed on the flat battery by approaching the flat battery while the terminal is held by a welding jig, and the welding electrode is connected to the first or second battery. 8. The terminal according to claim 4, wherein the welding electrode penetrates the electrode hole and presses the terminal against the flat battery when the welding electrode is located at the second welding position. 9. Flat battery terminal attaching device. 9. The inspection and collection machine inspects a battery collection mechanism for receiving a terminal-equipped battery from the chuck at the collection position, and a voltage and a terminal mounting position of the terminal-equipped battery collected by the battery collection mechanism. An inspection unit, a defective pallet to which a battery with a terminal determined to be defective by the inspection unit is transported, and the battery container with a terminal in which a battery with a terminal determined to be good by the inspection unit is stored.
2. A sampling inspection pallet on which one battery with terminals selected from among the batteries with terminals determined to be non-defective by the inspection unit is provided.
The flat battery terminal attaching device according to claim 8. 10. A control mechanism for stopping the transporter when the next battery with terminals is transported to the extraction pallet while the batteries with terminals are still placed on the extraction pallet. Claim 1 characterized by the following:
The flat battery terminal attaching device according to claim 9. 11. A welding machine for welding a terminal to a surface of a flat battery, comprising: a welding machine main body; a head having at least one or more welding electrodes; and a guide for guiding the head from a standby position to a welding position. And a drive mechanism for reciprocating the head unit from the standby position to the welding position, wherein the drive mechanism includes a drive unit, and a rotating shaft. A lever connected to the welding machine body so as to be reciprocally rotatable, a first connecting rod connecting the driving unit to one end of the lever, and a second connecting rod connecting the other end of the lever to the head. A connecting rod, and a rotation axis of the lever is provided between the one end and the other end and near the other end, and one end of the lever is moved from the welding position side by the driving unit. At the standby position side at a constant speed When it is position, welder, wherein the head portion is to close while reducing the moving velocity toward the welding position from the standby position. 12. The head unit in a state in which a chuck including two arms for holding the flat battery from the side thereof and holding the arm openably and closably is located at the welding position. The welding machine according to claim 11, wherein the robot approaches the flat battery while decreasing its moving speed from the standby position. 13. The terminal is temporarily fixed on the flat battery by approaching the flat battery while the terminal is held by a welding jig, and the terminal is held by the welding jig. An electrode hole penetrating from the holding surface to the head portion side is provided, and when the head portion reaches the welding position, the welding electrode passes through the electrode hole to connect the terminal to the flat battery. 13. The welding machine according to claim 11, wherein the welding machine is pressed against the welding machine. 14. The head part includes one or more rod-shaped welding electrodes and a head body that supports the welding electrodes. The head body has a groove for gripping the welding electrodes. Is provided, the welding electrode includes a gripped portion gripped by the split groove of the head portion main body and an electrode tip portion, and a diameter of the gripped portion is larger than a diameter of the electrode tip portion. The welding machine according to any one of claims 11 to 13, wherein: 15. The welding machine according to claim 11, further comprising a polishing mechanism for polishing a tip of said welding electrode. 16. A method for welding a terminal to a flat type battery by a welding machine comprising a head having at least one or more welding electrodes and a drive mechanism for reciprocating the head from a standby position to a welding position. In a state where the terminal is temporarily fixed on the flat battery by a welding jig having an electrode hole, the flat battery is supplied to a welding position of the welding machine, and the head is welded from the standby position to the welding position. The welding electrode is inserted into the electrode hole by approaching while decreasing its moving speed toward a position, and the terminal is pressed against the flat battery by the welding electrode, and the terminal and the flat battery are pressed. And welding the terminals of the flat battery.