JP2000310330A - Bellows - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bellows which can be simpler in manufacture and lower in cost than a conventional bellows, installed on a machine tool without a specific clearance required for installation and prevented from producing noise. SOLUTION: This bellows is provided with a bellows main body 2 having first sheet bodies 4, 5 bent to alternately form a main body side projected part 2a and a main body side recessed part 2b, and a protection member 3 composed of a second sheet body and secured on a front face side of the bellows main body 2 for being expanded and contracted with telescopic motion of the bellows main body 2. The protection member 3 consists of protection member side projected parts 3a formed by being secured to each main body side projected part 2a formed in the bellows main body 2 and protection member side recessed parts 3b formed between the protection member side projected parts 3a to move to the direction of the main body side recessed part 2b at contraction. A length from each protection member side projected part 3a to each protection member side recessed part 3b is shorter than a length from the main body side projected part 2a to the main body side recessed part 2b, and metallic plates or protecting plates made of synthetic resin 6, 6 are secured between the protection member side projected part 3a and the protection member side recessed part 3b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bellows mounted on a machine tool such as a machining center, a grinding machine or a laser machine or a welding machine.

[0002]

2. Description of the Related Art Hitherto, bellows have been used as components constituting, for example, a camera and an accordion.
In recent years, it has been used as a component of a machine tool such as a machining center, a grinding machine, or a laser processing machine or a welding machine. For example, in a laser welding machine, bellows are attached to the left and right or top and bottom of a head that drives two-dimensionally or three-dimensionally and irradiates laser light, and dust is applied to a guide rail that guides the head by such bellows. In a laser welding machine of the type in which the laser light is prevented from adhering or the laser light passes through the inside of the bellows, the laser light is prevented from being applied to the fingers of the worker.

However, in the above-mentioned conventional bellows,
For example, when grinding metal with the above grinder, grinding chips and coolant liquid are often scattered, and when such grinding chips adhere to the bellows, a hole is opened in the bellows or melting occurs. There is.

Therefore, in order to eliminate such inconvenience that a hole is opened due to scattering of grinding dust and the like, a base end of a metal plate bent in a substantially arc shape is fixed to each peak formed in the bellows main body. Those that have been proposed and used. Each metal plate constituting the bellows is formed to have a width from a specific peak when the bellows main body is extended to another peak formed next to the specific peak. When the bellows body is reduced, the metal plates overlap each other. According to such a bellows, since the grinding chips and the like scattered from the machine tool adhere to these metal plates, damage to the bellows main body can be prevented.

[0005]

However, in the above-mentioned conventional bellows, it is necessary to fix the metal plate to each of the peaks formed in the bellows main body. In addition, when the bellows is reduced, in addition to the length of the bellows body in the expansion and contraction direction, a clearance having a width substantially equal to the width of one metal plate is required. In addition, in many cases, noise occurs due to the large number of metal plates colliding with each other or rubbing each time the bellows expands and contracts.

Therefore, the present invention has been proposed to solve the above-mentioned problems of the conventional bellows,
A new bellows that can be manufactured more easily and at lower cost than a conventional bellows, does not require a specific clearance for a machine tool to which the bellows are attached, and can further prevent the generation of noise. It is intended to provide.

[0007]

Means for Solving the Problems The present invention has been proposed to solve the above-mentioned problems, and the first invention (the invention according to claim 1) is to fold the first sheet member. A bellows main body in which a main body side peak portion and a main body side valley portion are alternately formed; and a second sheet body, which is fixed to the front side of the bellows main body and is expanded and contracted with the expansion and contraction operation of the bellows main body. A protection member, wherein the protection member is formed by being fixed to each body-side crest formed on the bellows body, and a protection member-side crest formed by fixing the protection member to the protection member-side crest. And a protection member side valley portion formed between the member side ridge portion and moving in the body side valley direction at the time of contraction, and a length from each of the protection member side ridge portions to each protection member side valley portion is: The length is shorter than the length from the main body side peak to the main body side valley, Between the protective member side mountain portion protection member side valley is characterized in that the protective plate made of a metal plate is fixed. The protection plate fixed to the protection member constituting the first invention must be made of a metal plate or a thermoplastic resin. Examples of the metal plate include iron, copper, stainless steel, aluminum and the like. If light weight is required, it is preferable to use aluminum. When a thermoplastic resin is used as the material of the protection plate, for example, polyethylene resin, polypropylene resin,
Ethylene-vinyl acetate copolymer, ethylene-acrylic copolymer, ethylene-acrylate copolymer,
Ethylene / vinyl alcohol copolymer, polyvinyl chloride resin, polystyrene resin, etc. may be used.

In the first aspect of the present invention, a protection member which is expanded and contracted in accordance with the expansion and contraction operation of the bellows main body is fixed to the front surface of the bellows main body, and a protection plate made of a metal plate is fixed to this protection member. Therefore, molten metal, chips, cutting oil, and the like scattered by the driving of the machine tool adhere to the protection plate. That is, in this bellows, a protection member is formed on the front side of the bellows main body, and since a protection plate is fixed to this protection member, it is possible to sufficiently prevent the bellows main body from being damaged by molten metal or the like. It is possible to sufficiently improve the durability of the bellows. And since this bellows does not fix the base end of the metal plate to each crest formed in the bellows main body unlike the conventional bellows, it is not difficult to manufacture, and when it is further expanded and contracted. Even so, unlike the conventional bellows, the clearance of the width of the metal plate is not required for the machine tool, so that no special design is required for the machine tool to be mounted. Further, in this bellows, since the length from each protection member side crest to each protection member side trough is shorter than the length from the main body side crest to the main body side trough, protection is possible. Even when the member is extended most, the bellows main body is not completely extended, so the main body side valley formed in the bellows main body is not bent again as a valley when it is extended, and the shape collapses. The danger of accidents can also be effectively prevented.

The second invention (the invention described in claim 2)
A bellows body formed by folding a first sheet body and having a body-side crest portion and a body-side trough portion formed alternately; and a second sheet body fixed to the front side of the bellows body and fixed to the bellows body. A protection member that expands and contracts with the expansion and contraction operation of the main body, wherein the protection member is formed by being fixed to each main body-side crest formed in the bellows main body. And the protection member side ridges formed between the protection member side valleys and the protection member side valleys and moving in the direction opposite to the main body side valley direction when contracted. The length from the portion to each protection member side valley is made shorter than the length from the main body side crest to the main body side valley, and the protection member side crest and the protection member side valley are In between, a metal plate or a protective plate made of thermoplastic resin is fixed It is intended to.

[0010] In the bellows according to the second aspect of the present invention, each protection member side crest formed on the protection member moves in a direction opposite to the main body side trough direction when contracted. As described above, since the protection member-side valley does not move in the body-side valley direction, the thickness of the protection member or the protection plate does not affect the length of the entire bellows when the bellows is maximally contracted. Therefore, the length of the bellows at the maximum contraction can be made considerably shorter than that of the bellows according to the first aspect.

The third invention (the invention according to claim 3)
According to the first or second aspect of the present invention, the first sheet body extends in a direction perpendicular to the direction in which the bellows body expands and contracts, and the crests and valleys formed by bending are formed. Are provided alternately, and an extending portion that is extended and contracted in the same manner as the extending and contracting operation of the bellows main body is formed.

According to the present invention, even if chips, cutting oil and the like are scattered above the front surface of the bellows due to the driving of the machine tool, protection is provided by the extending portion formed in a direction perpendicular to the direction in which the bellows body expands and contracts. Therefore, it is possible to protect the parts of the machine tool formed further inside the bellows main body.

A fourth invention (an invention according to claim 4)
According to the first or second aspect of the present invention, a closing portion for closing between the bellows main body and the protection member is formed.

According to the bellows of the fourth aspect, between the bellows main body and the protection member, in particular, the front side of the main body side valley formed in the bellows main body or the protection member side peak formed on the protection member. It is possible to effectively prevent chips and cutting oil from entering the inside of the plate, thereby increasing the maximum reduction length due to the chips and the like.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Bellows according to each embodiment of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 1, the bellows 1 according to the first embodiment comprises a bellows main body 2 and a protection member 3 attached to the front side of the bellows main body 2.
The bellows main body 2 includes a front side sheet body 4 exposed to the front side.
A first sheet member (reference numeral is omitted), which is composed of a back sheet member 5 attached to the back surface of the front sheet member 4 and exposed on the back surface of the bellows main body 2, is bent and alternated. And a body-side peak 2a and a body-side valley 2b. Note that, in the present embodiment, synthetic leather is used for the front-side sheet body constituting the first sheet body, and vinyl chloride is used for the back-side sheet body 5. The main body-side crests 2a and the main body-side troughs 2b formed on the bellows main body 2 are not only formed by being bent, but are also formed after the main body-side crests 2a are bent. It is formed by being sewn in the length direction with the main body side valley portion 2b.

The protection member 3 fixed to the front surface of the bellows main body 2 is formed by bending a second sheet (not shown), and alternately protects the protection member side crests 3a and the protection member side. A valley 3b is formed. As shown in FIG. 2, the protection member-side crest 3a formed on the protection member 3 is formed as a crest by being sewn together with the bellows main body 2 in the vicinity of the main body-side crest 2a. The protection member-side valleys 3b formed between the protection member-side ridges 3a and the protection member-side ridges 3a are formed by simply bending the second sheet body. I have.

The width from the protection member side peak 3a to the protection member side trough 3b formed on the protection member 3 is shorter than the width from the main body side peak 2a to the main body side trough 2b. It has been. Therefore, this bellows 1 is extended,
As shown in FIG. 2, from the specific protection member side peak 3a to the protection member side trough 3b, the specific protection member side peak 3a
The bellows main body 2 is not fully extended even when the portion from the other protection member side peak 3a adjacent to the above to the protection member side valley 3b is linear. In this sense, the protection member 3 functions as a stopper for preventing the bellows main body 2 from being completely extended.

On the front surface of the protection member 3, protection plates 4 and 4 formed in a rectangular shape are attached. The protection plates 6 and 6 are made of aluminum, and have a width slightly smaller than the width from the protection member side peak 3a to the protection member side valley 3b. It is slightly shorter than the width (the length orthogonal to the direction of expansion and contraction). In the present embodiment, the protection member-side trough 3b formed on the protection member 3 has a
It is configured to move in a direction away from the main body side valley portion 2b, and is configured to move in the direction of the main body side valley portion 2b formed on the bellows main body 2 when contracted, as shown in FIGS. ing.

According to the bellows 1 according to the first embodiment described above, the molten metal, chips, cutting oil, or the like scattered by the driving of a machine tool (not shown) is provided on the front side of the bellows 1 with a protective plate made of aluminum. Since the bellows 1 do not damage the bellows 1, the protection plates 6, 6 are entirely attached to the front surface of the protection member 3. The manufacturing process does not require a lot of trouble and costs can be suppressed, and even if the whole is reduced, the length of the bellows 1 at the time of the maximum reduction becomes long. Absent.

In the above-described embodiment, as described above, the protection member side valley 3b constituting the protection member 3 is formed.
Is configured to move in a direction away from the body-side valley portion 2b when extended, and to move in a body-side valley portion 2b direction formed in the bellows body 2 when contracted. As described above, as shown in FIG. 4, the protection member-side valleys 3b constituting the protection member 3 are formed as protection member-side ridges 3b, and the protection member-side ridges 3b are formed as protection member-side valleys 3b. When extended, the protection member side crest 3b
However, as shown in FIG. 5, it may be configured so as to approach the main body side valley portion 2b and move in a direction away from the main body side valley portion 2b when contracted. According to the bellows 1 having such a configuration, when the protection member 3
Does not enter into the main body side peak 2a of the bellows main body 2 and the main body side peak 2a.
Can be shorter than.

Next, a bellows 10 according to a second embodiment will be described in detail with reference to FIGS.
FIG. 6 is a perspective view showing a main part of the bellows 10 from the front side, and FIG. 7 is a perspective view showing a main part of the bellows 10 from the back side. The bellows 10 includes a bellows body 11 formed by bending a first sheet body, and a bellows body 1 similar to the bellows 1 according to the first embodiment.
1 is composed of a protection member 12 fixed to the front side and protection plates 13 and 13 attached to the front surface of the protection member 12. One end of the bellows main body 11 (the upper end in this example) ) Indicates that the first sheet body extends beyond the width of the protection member 12 and is bent in a direction perpendicular to the direction in which the bellows 10 expands and contracts, and the extended portion 11c is formed. Has features. That is, the extension 11c
Is formed integrally with the bellows main body 11 by the first sheet body, and the extension portion 11c has a main body-side crest formed on the front side of the bellows main body 11 (the reference numeral is omitted). ) Is bent approximately 90 degrees from the upper end of the central ridge 11d and protrudes rearward, and the left ridge 1 protrudes left and right from the upper end of the main body side ridge with the central ridge 11d interposed therebetween.
As shown in FIG. 7, the central ridge 1e and the right ridge 11f are formed obliquely downward from the upper end of the main body ridge.
Left valley 11 formed between 1d and left ridge 11e
g, a right valley portion 11h (see FIG. 6) formed diagonally below the upper end of the main body side mountain portion and formed between the central mountain portion 11d and the right mountain portion 11f, and a left mountain portion 11e. A back-side crest 11i formed below the position where the top and right crest 11f converge and located parallel to body-side trough 11
It is composed of

The extending portion 11c formed on the bellows main body 11 includes the central mountain portion 11d, the left mountain portion 11e,
Right side mountain part 11f, back side mountain part 11i, and left side valley part 11
g, via the right trough 11h, the bellows body 1 expands and contracts with the expansion and contraction operation. Needless to say, the protection member 12 also expands and contracts through the protection member side peak 12a and the protection member side trough 12b.

Therefore, according to the bellows 10 according to the second embodiment described above, not only the same operation and effect as the bellows 1 according to the first embodiment can be realized, but also the extending portion can be realized. 11c makes it possible to prevent dust from adhering to the back side of the bellows main body 11 or to prevent cutting oil or the like scattered from a machine tool or the like from adhering.

Next, a bellows 20 according to a third embodiment of the present invention will be described in detail with reference to FIGS. In the bellows 20 according to this embodiment, the protection member 13 constituting the bellows 10 according to the second embodiment is provided with an extension substantially similar to the extension 11c formed on the bellows main body 11. It is characterized by the following. Therefore, since the bellows body constituting the bellows 20 according to the third embodiment has the same configuration as the bellows body 11 according to the second embodiment, it is the same in FIGS. 8 and 9. And the detailed description is omitted.

The bellows 20 include a bellows body 11 (see FIG. 9) having the above-described configuration (having the extending portion 11c), a protection member 21 (see FIG. 8), and a stainless steel stuck to the protection member 21. The protection member 21 is located on the front side of the bellows main body 11 and the protection plates 22 are adhered to the front surface thereof. The body is bent so that a protection member side mountain portion 21a and a protection member side valley portion 21b are formed alternately, and a front portion (symbol is omitted) is bent from the upper end of the front portion to the rear side. And an extending portion 21d formed by the above. As shown in FIG. 8, the extending portion 21d is formed with a central mountain portion 11d formed on the bellows main body 11.
(See FIG. 7) by being sewn to the central mountain portion 11d.
And a protection member-side left crest 21f formed on the bellows main body 11 so as to cover the protection member-side center crest 21e.
And a protective member-side right peak 21g formed on the bellows main body 11 along the right-side peak 11f, and formed between the protective member-side central peak 21e and the protective member-side left peak 21f. Left valley portion 21h, a right valley portion 21i formed between the protection member side central ridge portion 21e and the protection member side right ridge portion 21g, the protection member side left ridge portion 21f, and the protection member side right side. And a central valley 21j formed between the ridge 21g.

The left valley portion 21h and the right valley portion 21
i is such that the bellows 20 is gradually inclined downward from the front side to the back side of the bellows 20, and the central valley portion 21j
Is gradually inclined downward from the back side to the front side of the bellows 20. A left front valley portion 21k and a right front valley portion 211 are formed at the upper end of the front surface of the protection member 21. A left front valley portion 21m is provided above the left front valley portion 21k. A right front mountain portion 21n is formed above the right front valley portion 211. That is, the protection member 21 constituting the bellows 20 expands and contracts along with the contraction operation of the bellows main body 11 via the peaks and valleys (symbols are omitted) formed in the above-mentioned extending portion 21d.

Therefore, according to the bellows 20 according to the third embodiment described above, in addition to the functions and effects of the bellows 1 and 10 according to the first and second embodiments, the bellows 20 is formed on the protective member 21. The first and second portions are extended by the extending portion 21d.
As in the bellows 1 and 10 according to the embodiment, the space formed between the bellows main bodies 2 and 11 and the protection members 3 and 12 is closed from above. Therefore, it is possible to prevent grinding chips, cutting chips, molten metal, coolant liquid or the like scattered by driving of the machine tool or the like from entering between the protection member 21 and the bellows main body 11, and the durability of the bellows 20 can be prevented. Properties can be further improved.

In the bellows 10, 20 according to the second embodiment described above, the protection member side valleys 12b, formed on the protection members 12, 22 to which the protection plates 13, 13, 22, 22, are adhered. The structure in which the bellows 21b approaches or separates from the body-side valley (not shown) formed on the bellows main body 11 by the expansion and contraction operation of the bellows 10, 20 has been shown and described in the first embodiment. As a modification of the bellows 1 according to the embodiment, similarly to the configuration described with reference to FIGS. 4 and 5, the protection member side valleys 12b and 21b are used as the protection member side peaks, and the protection member side peaks are formed. Protection member-side crests 12 formed on both sides of the portion
a, 21a may be bent as a protection member-side valley, and the protection member-side peak may protrude to the front side when contracted.

In each of the above embodiments, only the upper ends of the bellows 1, 10, and 20 are shown and described, and the configuration of the lower ends is not described. Depending on the configuration of the machine or the like, a configuration similar to the configuration on the upper end side may be adopted for the lower end side. In particular, in the bellows 10 according to the second embodiment, the length of the extending portion 11c (extending length from the front side to the back side) formed in the bellows main body 11 is further increased. The length of the extending portion 11c formed on the bellows main body 11 and the length of the extending portion 21d formed on the protection member 21 may be further lengthened in the bellows 20 according to the third embodiment. May be used.

[0031]

As is clear from the above description of the embodiments of the present invention, in the present invention (the invention according to claim 1), the front surface of the bellows main body is attached along with the expansion and contraction operation of the bellows main body. The protective member that is expanded and contracted is fixed, and a protective plate made of a metal plate is fixed to the protective member. For example, when a large amount of grinding dust or coolant generated from a grinder is scattered, Even if the molten metal or the like is scattered by driving of a welding machine or the like, all of them adhere to the protective plate. That is, in this bellows, since both the protection member and the protection plate are formed on the front side of the bellows main body, it is possible to sufficiently prevent the bellows main body from being damaged by grinding dust and the like. And in this bellows, unlike the conventional bellows, since the base end of the metal plate is not fixed to each crest of the bellows main body, manufacturing is not difficult, and even if it is further expanded and contracted, Since the clearance of the width of the metal plate is not required unlike the conventional bellows, no special design is required for the machine tool to be mounted. Further, in this bellows, since the length from each protection member side crest to each protection member side trough is shorter than the length from the main body side crest to the main body side trough, protection is possible. Even when the member is extended most, the bellows main body is not completely extended, so the main body side valley formed in the bellows main body is not bent again as a valley when it is extended, and the shape collapses. The danger of accidents can also be effectively prevented. Further, according to the present invention, it is possible to sufficiently prevent the generation of noise that has conventionally occurred.

Further, the second invention (the invention according to claim 2)
Then, each protection member side crest formed on the protection member moves in the opposite direction to the main body side trough direction at the time of contraction, and as in the first invention, the protection member side trough is formed on the main body side. It does not move in the valley direction. Therefore, the entire length of the bellows when the bellows is most contracted is not affected by the thickness of the protection member or the protection plate. Therefore, the length of the bellows when contracted most can be made considerably shorter than the bellows according to the first invention.

The third invention (the invention according to claim 3)
In the above, even if grinding debris or coolant liquid scatters above the front surface of the bellows due to the driving of the machine tool, it is protected by the extending portion formed in the direction perpendicular to the expansion and contraction direction of the bellows body, The components of the machine tool formed further inside the bellows main body can be protected, and the bellows main body forming the bellows can also be protected.

The fourth invention (the invention according to claim 4)
Then, grinding debris and coolant liquid enter between the bellows body and the protection member, in particular, on the front side of the body-side valley formed on the bellows body or inside the protection member-side crest formed on the protection member. In addition, it is possible to effectively prevent the maximum reduction length from being increased by the grinding dust and the like, and it is possible to sufficiently improve the durability of the bellows.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a bellows according to a first embodiment of the present invention from the front side.

FIG. 2 is a plan sectional view showing a main part of the bellows shown in FIG. 1 in an extended state.

FIG. 3 is a plan sectional view showing a state where the bellows shown in FIG. 1 is contracted.

FIG. 4 is a perspective view showing a modification of the bellows shown in FIG.

FIG. 5 is a plan sectional view showing a main part of the bellows shown in FIG. 4 in a slightly reduced state.

FIG. 6 is a perspective view showing a main part of a bellows according to a second embodiment of the present invention from the front side.

FIG. 7 is a perspective view showing a main part of a bellows according to a second embodiment of the present invention from the back side.

FIG. 8 is a perspective view showing a main part of a bellows according to a third embodiment of the present invention from the front side.

FIG. 9 is a perspective view showing a main part of a bellows according to a third embodiment of the present invention as viewed from the rear side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bellows 2 Bellows main body 2a Main body side peak part 2b Main body side valley part 3 Protective member 3a Protective member side peak part 3b Protective member side valley part 4 Front side sheet body 5 Back side sheet body 6 Protective plate 10 Bellows body 11 Bellows body 11c Existing portion 12 Protective member 12a Protective member side crest 12b Protective member side valley 13 Protective plate 20 Bellows 21 Protective member 21d Extension portion 22 Protective plate

Claims (4)

[Claims] 1. A bellows body formed by bending a first sheet body and having a body-side crest and a body-side trough formed alternately, and a second sheet body fixed to a front side of the bellows body. And a protection member that expands and contracts as the bellows body expands and contracts. The protection member is formed by being fixed to each body-side crest formed on the bellows body. The protection member side crests formed between the protection member side crests and the protection member side crests, the protection member side crests moving in the body side trough direction when contracted. And the length from the main member side valley to the main body side valley is shorter than the length from the main body side ridge to the main body side valley. In between, a metal plate or a protective plate made of thermoplastic resin is fixed. Bellows that. 2. A bellows body in which a first sheet body is bent to form a main body side ridge and a body side valley part alternately, and a second sheet body fixed to a front side of the bellows body. And a protection member that expands and contracts as the bellows body expands and contracts. The protection member is formed by being fixed to each body-side crest formed on the bellows body. The protection member-side valley portion formed between the protection member-side valley portion and the protection member-side valley portion and moving in a direction opposite to the body-side valley portion when contracted. The length from the member-side crest to each protection member-side valley is shorter than the length from the main body-side crest to the main body-side valley, and the protection member-side crest and the protection member-side Between the valleys, a metal plate or a protective plate made of thermoplastic resin is fixed Bellows, wherein the door. 3. The bellows body, wherein the first sheet body extends in a direction orthogonal to a direction in which the bellows body expands and contracts, and alternately includes bent peaks and valleys. The bellows according to claim 1 or 2, wherein an extension portion is formed to extend and contract in a manner similar to the extension and contraction operation of the main body. 4. The bellows according to claim 1, wherein a closing portion for closing between the bellows main body and the protection member is formed.