JPH09220691A - Bellows - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable quick detecting of an abnormality and stopping of a laser beam machine when an unexpected accident, such as the development of a hole in a billows, happens, by arranging a lead wire in the bellows. SOLUTION: The lead wire 9 is formed at each corner part of the bellows 1. Then, the bellows 1 is fitted between a beam path duct and a machining head of the lead beam machine 20 and also, the one end 9a of the lead wire 9 is connected with the one side of terminal 20a arranged at the laser beam machine 20 and the other end 9b is connected with the other side of terminal 20b to use the bellows. By this constitution, at the time of turning on a switch 21, an LED 22 as a lamp is turned on. Therefore, since the LED 22 is turned off in the case the lead wire 9 breaks by irradiation of the laser beam, an operator can confirm by this state that the hole is developed in the bellows 1. Further, the terminals 20a, 20b arranged in the machine 20 can be connected with an electric power source of the machine 20 or a buzzer instead of the lamp so that the machine 22 is stopped or the buzzer is worked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bellows attached to a laser beam machine, and more particularly to a bellows having a large number of reflectors adhered to an inner surface of a bellows body.

[0002]

2. Description of the Related Art Conventionally, bellows have been used in, for example, a photographic machine and an accordion, but in recent years, the bellows has also been used in a laser processing machine. This is because a bellows is attached between the transmitter and the processing head provided in the main body of the laser processing machine, so that dust adheres to the reflection mirror attached to the main body of the laser processing machine and the condenser lens fixed to the processing head. This is to effectively prevent the situation in which the laser light is not reliably collected and the danger that an operator touches the laser light. However, when the bellows is attached to the laser processing machine as described above, the laser light emitted from the transmitter is irregularly reflected, or the laser light emitted to the work is reflected and passes through the condenser lens again. Irradiation of the bellows may cause a hole in the bellows, and the bellows may burn in some cases.

Therefore, in order to effectively prevent such a situation, the applicant of the present application has developed a new bellows disclosed in Japanese Utility Model Laid-Open No. 3-112717. This bellows is formed by forming a large number of peaks and valleys so that it can be expanded and contracted, and the overall shape is formed into a substantially rectangular parallelepiped shape. An upper reflecting plate having a reflecting surface, a lower reflecting plate having a reflecting surface formed by adhering to each inclined surface of the inner bottom surface of the bellows body, and each inclination of the inner left surface of the bellows body. A left reflector plate having a reflecting surface, which is adhered to each surface, and a right reflector plate having a reflecting surface, which is adhered to each inclined surface of the inner right surface of the bellows body. Is. And, the bellows configured in this way,
For example, as shown in FIG. 11, when the laser processing machine 100 is mounted between the optical path duct 101 and the processing head 102, laser light emitted from a transmitter (not shown) provided in the laser processing machine 100 is diffusely reflected. Alternatively, even if the laser light applied to the work W is reflected and passes through the condenser lens 103 again to be applied to the bellows 104, as described above, the reflection plate is provided inside the bellows 104. Since 104a and 104b are adhered, it is possible to prevent the bellows 104 from being perforated or burned to some extent.

[Problems to be Solved by the Invention]

However, in the above-mentioned bellows 104,
The reflectors are provided at all locations inside the bellows body, that is, between one end of each upper reflector and the upper end of each left reflector, the other end of each upper reflector and each right reflector. Between the one end side of each lower reflector and the lower end side of each left reflector, and between the other end of each lower reflector and the lower end of each right reflector. Can not be adhered to the bellows body, and when the corners of the bellows body are irradiated with the laser light, the bellows body may be punctured or burned, and the bellows 104 may fall off. When the laser beam is directly irradiated by the laser light, even the portions where the reflection plates 104a and 104b are adhered are melted and a large hole is opened.

Therefore, the present invention has been proposed to solve the above-mentioned problems of the conventional bellows,
When a laser beam is irradiated to a place where each of the reflection plates cannot be bonded and a hole is opened or burned, the laser processing machine is stopped in cooperation with the laser processing machine or the fact is immediately stopped. An object of the present invention is to provide a bellows attached to a laser processing machine that can be recognized by an operator.

[0006]

The present invention has been proposed to achieve the above object, and the first invention (the invention according to claim 1) is connected to a power source, a lamp, a buzzer or the like. It is a bellows arranged along the optical path of a laser beam emitted from a laser processing machine having one and the other connection terminals, and has a large number of peaks and troughs, and the overall shape is substantially the same. A bellows body formed in a rectangular parallelepiped shape and including an outer sheet body and an inner sheet body,
Between the outer sheet body and the inner sheet body, the bellows body is arranged from one end side to the other end side, one end is connected to the one connection terminal, and the other end is the other side. And a lead wire which is connected to the connection terminal of and is disconnected by irradiation of laser light.

Further, the second invention (the invention according to claim 2)
Is a bellows arranged along an optical path of a laser beam emitted from a laser beam machine having one and other connection terminals connected to a power source, a lamp, a buzzer or the like, and has a large number of peaks and valleys. A bellows main body formed into a substantially rectangular parallelepiped shape, and an upper reflecting plate adhered to each inclined surface of the inner upper surface of the bellows main body, and an inner bottom surface of the bellows main body. Lower reflectors that are respectively bonded to the inclined surfaces, left reflectors that are respectively bonded to the inner left surfaces of the bellows body, and left side reflectors that are respectively bonded to the inner right surface of the bellows body. A right reflector, which is formed between the one end of each of the upper reflectors and the upper end of each left reflector, between the other end of each upper reflector and the upper end of each right reflector, One end side of each lower reflector and each left reflector One end is connected to the one connection terminal at least at one of four places between the lower end side or the other end side of each of the lower side reflectors and the lower end side of each of the right side reflectors. The other end is connected to the other connection terminal, and a lead wire that is disconnected by irradiation of laser light is formed.

The third invention (the invention according to claim 2)
The bellows body comprises an outer sheet body forming a surface layer and an inner sheet body attached to the back surface of the surface layer, and the lead wire is formed between the outer sheet body and the inner sheet body. It is characterized by becoming.

The fourth invention (the invention according to claim 3)
Is characterized in that the lead wire is made of at least a conductive material which is melted by irradiation with laser light, and a low melting point resin is coated on the surface of the conductive material. In addition,
As the conductive material which is melted by the irradiation of the laser beam,
Conventionally used as a conductive material, for example,
A metal material such as copper, gold, silver, stainless steel or aluminum may be used. Note that these metal materials need to be cut off in whole or in part by being irradiated with laser light, and even when laser light is not irradiated due to repeated expansion and contraction operation by driving a laser processing machine. In order to prevent the metal material from being cut or broken by fatigue, when the metal material is formed into a linear body, it is preferable to use a material having a diameter of about 5 to 50 μm. Alternatively, a large number of twisted pieces may be used, or a film-like piece having a thickness of about 5 to 80 μ may be used. Examples of the low melting point resin coated on the conductive material include polystyrene (PS), polyvinyl chloride (vinyl chloride resin), polyvinyl acetate, polymethyl methacrylate (methacrylic resin), polyethylene (PE), Polypropylene (P
P), polycarbonate (PC), polyamide (P
A), polyacetal (POM), polyethylene terephthalate (PET), polybutylene terephthalate (P
BT), acrylic resin, ABS resin (ABS), AS resin (SAN), EVA resin (ethylene vinyl acetate copolymer resin), methacrylic resin (PMMA), cellulose acetate (CA), modified PPO resin, polysulfone, vinyl chloride resin The melting point of (PVC) etc. is about 40 to 250 degrees Celsius
It is sufficient to use a thermoplastic resin of a certain degree.

The fifth invention (the invention according to claim 4)
The lead wire is provided with a conductive portion made of a large number of thread-shaped conductive materials woven or non-woven, and a low melting point resin applied to the surface of the conductive portion. It is characterized by becoming. When a woven cloth is used as the conductive material, for example, the wire diameter is 5 to 50.
It is preferable to use a yarn obtained by weaving a mixed yarn of μ stainless steel yarn and polyester yarn in the longitudinal and transverse directions. Further, by using a stainless steel yarn having a wire diameter of 3 to 10 μ, laser processing is further performed. Even if the laser light is not irradiated by the repeated expansion and contraction operation by driving the machine, it is possible to prevent cutting or breaking due to metal fatigue.

The sixth invention (the invention according to claim 5)
Is characterized in that the conductive material forming the lead wire is made of stainless steel thread, and the low melting point resin is made of acrylic resin.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the bellows according to the present invention will be described in detail with reference to the drawings. First, the bellows 1 according to the embodiment of the first invention will be described.

As shown in FIG. 1, the bellows 1 has a bellows body 4 composed of an outer sheet body 2 and an inner sheet body 3 attached to the inner side surface of the outer sheet body 2 with an adhesive. The upper sheet reflector 5, which is adhered to the inner surface of the inner sheet body 3, the lower reflector plate 6, the left reflector plate 7, the right reflector plate 8, and the outer sheet body 2 which constitutes the bellows body 4. Lead wire 9 formed between the inner sheet body 3 and the inner sheet body 3.
It consists of and.

The outer sheet body 2 is a member that forms the outer surface of the bellows 1. In this example, black synthetic leather is used. The inner sheet body 3 is
Polym-phenylene isophthalamide, a flame-retardant and heat-resistant resin (Nomex (registered trademark "N
omex ")) is used. The inner sheet body 3 is not limited to the above materials, but may be poly-meta-xylylene adipamide (MXD fiber or X fiber), polyp.
-Aromatic nylons such as phenylene terephthalamide (Kevlar (registered trademark "Kevlar" manufactured by DuPont)), polyamides such as aromatic polyamides, polyimides such as polyimides, polyamideimides, polyesterimides, etc.
Further, fluorine rubber such as VDF-HFP fluorine rubber, TFE-P fluorine rubber, fluorine-containing silicon fluorine rubber, fluorine-containing vinyl ether fluorine rubber and the like may be used. Alternatively, as the high melting point resin, for example, polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), polyvinyl fluoride ( PVF), Polyvinyl difluoride (PVDF)
May be used.

As shown in FIG. 2, the bellows body 4 composed of the outer sheet body 2 and the inner sheet body 3 is bent so that a large number of peaks 4a and valleys 4b are formed. Then, inside the bent bellows body 4 (inner sheet body 3), among the inclined surfaces formed from the mountain portion 4a to the valley portion 4b, the inclined surfaces formed on the upper side ( As shown in FIG. 1, the upper reflection plate 5 is attached to each of the reference numerals, and the lower reflection plate 6 is attached to each of the inclined surfaces formed on the lower side. Similarly, the left reflector 7 is adhered to each inclined surface formed on the left side of the inner sheet body 3, and the right reflector 8 is adhered to each inclined surface formed on the right side. Each of these reflectors 5,
Nos. 6, 7, and 8 are aluminum plates whose surfaces are mirror-finished so as to reflect laser light and which are formed in a rectangular shape.

Then, the bellows 1 according to the embodiment of the present invention.
Then, as shown in FIG. 1, between the outer sheet body 2 and the inner sheet body 3 constituting the bellows body 4, the left end side of each of the upper reflection plates 5 and the upper end side of each of the left reflection plates 7 are arranged. , Between the right end of each upper reflector 5 and the upper end of each right reflector 8, between the left end of each lower reflector 6 and the lower end of each left reflector 7, and A lead wire 9 constituting the present invention is formed between the right end side of each lower reflector 6 and the lower end side of each right reflector 8, that is, at each corner of the bellows 1. As shown in FIGS. 2, 3 and 4, one end 9a of the lead wire 9 is exposed at one corner of the bellows 1 on the upper end side.
The other end 9b is exposed at a corner on one lower end side of the bellows 1. That is, in the bellows 1 according to the description of the present embodiment, the lead wire 9 whose one end 9a is exposed at one upper end corner portion of the bellows 1 is formed on each of the upper reflectors 5 as shown in FIG. The upper end side reflector 5 is wired between the left end side and the upper end side of each left side reflector 7 along the length direction of the bellows 1 and is bonded to the rightmost side (the other side of the bellows 1) in the figure. Is wired in the length direction of the upper end side reflection member 5, and further passes between the right end side of each upper side reflection plate 5 and the upper end side of each right side reflection plate 8, and the leftmost side in the figure ( The back side of the right reflector 8 bonded to one side of the bellows 1) is wired downward, and further,
Wiring is provided along the length direction of the bellows 1 between the right end side of each of the lower reflectors 6 and the lower end side of each of the right reflectors 8, and is located on the rightmost side (the other side of the bellows 1) in the figure. The back side of the bonded lower end side reflection plate 6 is wired in the length direction of the lower end side opposite plate 6,
Further, the other end 9b is exposed to the outside again at a corner of one lower end of the bellows 1 passing between the left end side of each lower reflector 6 and the lower end side of each left reflector 7. It should be noted that one end 9a of the lead wire 9 exposed to the outside of the bellows 1 is connected to one terminal provided on a laser processing machine (not shown), and the other end 9b is connected to the other terminal. Is.

As shown in FIG. 5, the lead wire 9 is composed of a conductive portion 9c made of a conductive material and a low melting point resin 9d coated on the surface of the conductive portion 9c. However, in the bellows 1 according to the description of this embodiment, in order to prevent the risk that the conductive material is metal-fatigue caused by repeated expansion and contraction, and the laser light is not irradiated, the wire is broken. As the conductive portion 9c, a band-shaped body formed by weaving a blended yarn composed of a large number of stainless steel threads and polyester threads in the longitudinal and transverse directions is used, and an acrylic resin is used as the low melting point resin 9d.

The bellows 1 having the above-mentioned structure is
The lead wire 9 is attached between the optical path duct of the laser processing machine (not shown) and the processing head, and, for example, as shown in FIG. 6 or 7, one terminal 20a provided on the laser processing machine 20 is connected to the terminal 9a. One end 9a is connected and the other terminal 20b is connected to the other end 9b. That is, in the example shown in FIG. 6, the LED 22 as a lamp is configured to be turned on when the switch 21 is turned on, and when the lead wire 9 is broken by the irradiation of laser light, the LED 22 is turned on. Is turned off, and the operator confirms that the bellows 1 has a hole by turning off the LED 22. Further, in the example shown in FIG. 7, the laser processing machine 20 includes the LED 22 and two transistors 23 and 24.
The switch 22 is turned on, and when the lead wire 9 is broken, the LED 22 is turned on. The operator opens a hole in the bellows 1 by turning on the LED 22. Is to be confirmed.

As described above, according to the bellows 1 described above, when the laser beam is applied to the portion which cannot be protected by the reflectors 5, 6, 7, 8 the lead wire formed on the bellows 1 is formed. Since the wire 9 is disconnected, one end 9a of the lead wire 9 is connected to the one terminal 2 provided on the laser processing machine 20.
0a and the other end 9b is connected to the other terminal 20b, so that the LED 2 arranged in the laser processing machine 20 is connected.
By turning off or turning on 2, the operator can be promptly and surely notified that the bellows 1 has a hole opened by the irradiation of the laser beam.

Particularly, in the bellows 1 according to the embodiment of the present invention described above, the lead wire 9 is formed between the outer sheet body 2 and the inner sheet body 3 and is provided on the back surface of the inner sheet body 3. Since they are not adhered, even if the bellows body 4 repeatedly expands and contracts, it is possible to effectively avoid the risk that the lead wires 9 fall off or hang down in the optical path of the laser light. Further, as described above, the conductive portion 9c forming the lead wire 9 uses a strip-shaped body formed by weaving a large number of stainless threads in a strip shape.
Due to metal fatigue caused by repeated expansion and contraction of the bellows body 4, it is possible to effectively prevent the risk of disconnection even when the laser light is not irradiated. Further, in the bellows 1, one lead wire 9 is used and one end 9a and the other end 9b are
Since both are exposed on one side of the bellows 1, the one and the other terminals provided on the laser processing apparatus are provided, for example, only on the optical path duct side, not on the processing head side where the condenser lens is provided. Therefore, the wiring position can be easily designed.

In the embodiment of the invention described above, one end 9a and the other end 9b of the lead wire 9 constituting the bellows 1 are
One terminal 20 connected to the LED 22 as a lamp
Although the example in which the a and the other terminal 20b are connected has been described, one and the other terminals provided in the laser processing machine to which the bellows according to the present invention is attached are not necessarily connected to the lamp as described above. It is not necessary that the laser processing machine is connected to the power source or the buzzer of the laser processing machine, and when the lead wire is broken, the laser processing machine may be stopped or the buzzer may be operated. .

Further, in the embodiment of the invention described above, the lead wire 9 is arranged between the outer sheet body 2 and the inner sheet body 3 which constitute the bellows body 4, but is described as an example.
The present invention does not necessarily have to be arranged in this way, and may be fixed inside the inner sheet body 3. Further, as for the conductive material and / or the low melting point resin forming the lead wire, other materials may be used as long as the lead wire is disconnected at least by irradiation with laser light.

Further, in the embodiment of the invention described above, the bellows 1 in which one lead wire 9 is used for one bellows body 4 is shown and described as shown in FIG. It suffices that the lead wire is provided at at least one of the corners of the bellows body, and the number of lead wires is not limited to one. For example, as shown schematically in FIG. 8 or FIG. 9, respectively. In addition, four or two may be arranged. That is, the bellows 30 shown in FIG.
Independent first to fourth lead wires 3 at each corner of the
1, 32, 33, 34 are formed and lead wires 31, 3 are formed.
One end 31a, 32a, 33a, 34a of 2, 33, 34
Is exposed at one side of the bellows 30, and the other ends 31b, 32
b, 33b and 34b are exposed on the other side. The laser processing machine to which the bellows 30 having the above-described structure is attached uses one having four terminals on the optical path duct side and four terminals on the condensing lens side. The bellows 40 shown in FIG.
a is exposed on one side of the bellows 40 between the upper reflector and the left reflector not shown, and is arranged on the left end side of each upper reflector and in the longitudinal direction of the bellows 40. At the same time, the midway portion passes through the back side of the upper reflecting plate adhered to the other side of the bellows 40, passes through the right end side of each upper reflecting plate, and the other end 41b is one side of the bellows 40. A first lead wire 41, which is exposed between an upper reflector and a right reflector, not shown, and one end 42a and the other end 42b which are arranged symmetrically with the first lead wire 41 However, the second lead wire 42 exposed on one side of the bellows 40 is arranged. In addition, the laser processing machine to which the bellows 40 configured as described above is attached uses one provided with two terminals on the optical path duct side and two terminals on the other side.

Each of the bellows 1, 30, 40 has lead wires 9, 31, 32, 33, 3 at the corners of the bellows body.
4, 41, and 42 are provided and described, the present invention is not limited to those provided at the corners of the bellows body, but a large number not shown, such as the bellows 50 shown in FIG. Upper reflector, lower reflector, left reflector,
The four lead wires 51, 52, 53, 54 may be provided substantially in the center of the right reflecting plate and along the length direction of the bellows 50. In addition, these lead wires 51, 52, 53, 54 have one ends 51a, 52a, 5
3a and 54a are portions connected to one connection terminal (not shown) provided in a laser processing machine (not shown), which is exposed at one end side of the bellows 50 and the other end, as in the above-described embodiments. Reference numerals 51b, 52b, 53b and 54b are portions connected to the other connection terminal (not shown) provided in the laser processing machine and are exposed at the other end of the bellows 50. According to the above-mentioned bellows 50 configured in this manner, the bellows 5
0 is dropped from a laser processing machine (not shown), and laser light is directly radiated to the above-mentioned upper reflection plate, lower reflection plate, left reflection plate or right reflection plate and melted to form the bellows 50 outer sheet body and inner sheet. When a hole is opened in the body, the four lead wires 51, 52, 53, 54 are also disconnected, so that the same effect as the above-described embodiment of the invention can be realized.

[0025]

As is apparent from the above description of the embodiment of the invention, according to the bellows according to the present invention, the bellows is directly irradiated with the laser beam due to the inconvenience such as dropping out from the laser beam machine. If a hole is opened in the main body, the lead wire will be disconnected and the power will be released to stop the laser processing machine, or the lamp will be turned on or off or the buzzer etc. will be driven, and the above inconvenience can be easily confirmed. it can.

The second invention (the invention according to claim 2)
According to the bellows according to the above, when the laser light emitted from the laser processing machine is irregularly reflected in the bellows, it is possible to effectively avoid a situation in which the laser light is protected by each reflecting plate, a hole is opened, and in some cases, burning occurs. Not only that, when laser light is applied to each corner that cannot be protected by the above reflectors and a hole is opened or burned, the lead wire is cut, so this bellows is attached to the laser processing machine. The laser processing machine can stop in cooperation with each other, or its state can be grasped quickly and surely by a lamp or a buzzer. That is, one terminal connected to one end of the lead wire forming the bellows and the other terminal connected to the other end of the lead wire are provided, and these one and other terminals are connected to a power source. If the laser processing machine, by disconnecting the lead wire, the laser processing machine is stopped,
The operator can confirm that the bellows has a hole or the like.If a lamp or buzzer is connected to the one or the other terminal, the lamp is turned on or off or the buzzer is turned on. By ringing, it is possible to recognize a state in which a hole is formed in the bellows.

In particular, the third invention (the invention according to claim 3)
According to the above, since the lead wire is formed between the outer sheet body and the inner sheet body that form the bellows body, there is a risk that the lead wire may fall off or hang down in the optical path of the laser light. It can be effectively prevented.

The fourth invention (the invention according to claim 4)
According to the above, the lead wire is composed of a conductive material that is melted at least by irradiation with laser light, and a low melting point resin is coated on the surface of the conductive material. Therefore, the lead wire is broken by being irradiated with laser light. Prone to, and therefore
It is possible to quickly understand a dangerous state before the bellows burns.

Further, according to the fifth invention (the invention according to claim 5), since the lead wire is made of a woven cloth or a non-woven cloth, a large number of conductive materials formed in a thread shape are repeatedly formed. Even when the expansion / contraction operation is performed, it is possible to effectively avoid the risk that the conductive material causes metal fatigue and is disconnected.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a state in which a bellows according to an embodiment of the present invention is cut at a midway portion.

FIG. 2 is a side view of a bellows.

FIG. 3 is a front view of the bellows shown in FIG.

FIG. 4 is a perspective view schematically showing a wiring state of the lead wire formed on the bellows shown in FIG.

FIG. 5 is a front sectional view schematically showing a section of a lead wire.

FIG. 6 is a circuit diagram schematically showing a state in which a bellows is attached to a laser processing machine.

FIG. 7 is a circuit diagram schematically showing a modified example of the circuit diagram shown in FIG.

FIG. 8 is a perspective view of a bellows schematically showing another example different from the wiring state of the lead wire shown in FIG.

FIG. 9 is a perspective view of a bellows schematically showing another example of the lead wires shown in FIG.

FIG. 10 is a perspective view schematically showing a bellows in which a lead wire disposition position is changed.

FIG. 11 is a cross-sectional view schematically showing a state in which a conventional bellows is attached to a laser processing machine.

[Explanation of symbols]

 1 bellows 2 outer sheet body 3 inner sheet body 4 bellows body 5 upper reflector plate 6 lower reflector plate 7 left reflector plate 8 right reflector plate 9 lead wire 9a one end of lead wire 9b other end of lead wire 9c conductive portion 9d low melting point Resin 20 Laser light processing machine 20a One terminal 20b Other terminal 22 LED 30 Bellows 31 ... 34 First to fourth lead wires 31a ... 34a One end of the first to fourth lead wires 31b ... 34b The other end of the 1st thru | or 4th lead wire 40 Bellows 41 The 1st lead wire 41a One end of the 1st lead wire 41b The other end of the 1st lead wire 42 The 2nd lead wire 42a Of the 2nd lead wire One end 42b The other end of the second lead wire 50 Bellows 51, 52, 53, 54 Lead wire 51a, 52a, 53a, 54a One end of the lead wire 51b, 52b, 53b, 54b Lead The other end of the

Claims (6)

[Claims] 1. A bellows arranged along an optical path of a laser beam emitted from a laser beam machine having one and other connection terminals connected to a power source, a lamp, a buzzer, etc. Between the outer sheet body and the inner sheet body, and the bellows body having an outer sheet body and an inner sheet body, which is formed into a substantially rectangular parallelepiped shape by forming a portion and a valley portion. It is arranged from one end side to the other end side of the lever bellows body, one end is connected to the one connection terminal, and the other end is connected to the other connection terminal and is disconnected by irradiation of laser light. A bellows characterized by comprising: 2. A bellows arranged along an optical path of a laser beam emitted from a laser beam machine having one and other connection terminals connected to a power source, a lamp, a buzzer, etc. Portions and valleys are formed and the overall shape is formed into a substantially rectangular parallelepiped shape, an upper reflecting plate adhered to each inclined surface of the inner upper surface of the bellows body, and the inside of the bellows body. Lower reflectors each adhered to each inclined surface of the lower surface, left reflectors adhered to each inclined surface of the inner left surface of the bellows body, and each inclined surface of the inner right surface of the bellows body, respectively. A bonded right reflector, between one end of each of the upper reflectors and the upper end of each left reflector, the other end of each upper reflector and the upper end of each right reflector. In between, one end of each of the above lower reflectors and each left One end is connected to at least one of four places between the lower end of the side reflector or the other end of each lower reflector and the lower end of each right reflector. A bellows characterized in that it is connected to a terminal and the other end is connected to the other connection terminal, and that a lead wire that is disconnected by irradiation of laser light is formed. 3. The bellows body comprises an outer sheet body forming a surface layer and an inner sheet body attached to the back surface of the surface layer, and the lead wire is provided between the outer sheet body and the inner sheet body. The bellows according to claim 2, which is formed. 4. The lead wire is made of at least a conductive material which is melted by irradiation with a laser beam, and a low melting point resin is coated on a surface of the conductive material. bellows. 5. The lead wire includes a conductive portion formed by woven or non-woven fabric of a large number of thread-shaped conductive materials, and a low melting point resin applied on the surface of the conductive portion. 4. The method according to claim 1, 2 or 3, characterized in that
Or the bellows according to 4. 6. The bellows according to claim 4, wherein the conductive material forming the lead wire is made of stainless steel thread, and the low melting point resin is made of acrylic resin.