KR102530526B1 - Spark scattering prevention device - Google Patents

Abstract

Disclosed is a spark prevention device capable of preventing sparks generated when welding pipes from scattering to the outside. The spark scattering prevention device, which is a spark scattering prevention device for preventing the scattering of sparks generated from a welding torch when welding a first pipe and a second pipe, comprises: a body part having an accommodation space therein, and including an insertion hole for introducing a welding torch into the accommodation space and an open hole communicating with the accommodation space; a plurality of support parts inserted into the accommodation space of the body part and having a mounting groove recessed into the inside so that the first pipe and the second pipe can be mounted; and an observation part installed on the body part to be able to move so that the open hole can be covered, and at least partially made of a transparent material to be able to check whether the first pipe and the second pipe are temporarily connected and a connection point between the first pipe and the second pipe. The body part is configured to first support at least one of the first pipe and the second pipe and later support the other one of the first pipe and the second pipe through the plurality of support parts.

Description

Spark scattering prevention device}

The present invention relates to a device for preventing sparks from scattering, and relates to a device for preventing sparks from scattering generated during welding.

A pipe welding device is a device that performs welding on circular pipes applied to buildings such as semiconductor facilities.

In order to weld such a pipe, it has been common to first weld the pipe outside the building and then apply the welded pipe to the building.

However, when additional welding of the piping is required during work inside a building, or when expanding, replacing, or repairing piping applied to an existing building, it is difficult to separate the piping requiring welding after the work such as casting is completed. It was difficult, and even if it was separated, there was a problem that the welding work of the pipe was not only cumbersome but also took a lot of time for welding because the casting work for the place where the pipe was inserted had to be additionally performed. To solve this problem, the pipe The need for a portable welding device that can weld directly in the installed place has emerged.

Such a movable welding apparatus is composed of a body member for welding and a pipe support member disposed under the body member and holding a pipe to be welded.

However, welding using a conventional movable welding device is performed while the pipe is supported by the curved surface formed on the lower portion of the body member and the pipe support member, while the curved surface formed on the lower portion of the body member has a constant curvature, Since the pipes having different diameters are formed in different sizes, the pipes having various diameters cannot all come into close contact with the main body member, so a gap is generated between the main body member and the pipe, and accordingly, the movable welding device can There was a problem that the welding position was distorted while randomly shaking when rotated in.

In addition, when the pipe is welded, sparks are generated at the welding part, and the spark spreads far from the welding part of the pipe and becomes a cause of safety accidents of workers and fire accidents at work sites, so a technology for solving this problem is was being demanded

KR 10-0411329 Y1

The present invention provides a spark prevention device capable of preventing sparks generated when welding pipes from scattering to the outside.

A spark prevention device according to an embodiment of the present invention for solving the above problems is a spark prevention device for preventing sparks generated from a welding torch when welding a first pipe and a second pipe, a body portion having an accommodation space therein, and having an insertion hole through which the welding torch is introduced into the accommodation space, and an open hole communicating with the accommodation space; a plurality of support parts inserted into the receiving space of the body part and having seating grooves recessed into the inside so that the first pipe and the second pipe can be seated; It is movably installed in the body so as to cover the open hole, and it is possible to check whether the first pipe and the second pipe are connected and the connection point of the first pipe and the second pipe. and an observation unit, at least a portion of which is made of a transparent material, so that the body unit first supports at least one of the first pipe and the second pipe through the plurality of support parts, and among the first pipe and the second pipe. It is configured to support the other one later.

The body portion may include a first body member in which a portion of the plurality of support portions is accommodated; a second body member rotatably coupled to the first body member, receiving another part of the plurality of support members, and having the insertion hole and the opening hole formed therein; a third body member in which the remaining part of the plurality of support members is accommodated and rotatably coupled to the first body member at a position adjacent to the second body member; a discharge member installed on at least one of the first body member to the third body member and discharging harmful gas generated during welding from the receiving space to the outside of the body portion; a plurality of position adjusting members respectively installed on the first body member to the third body member, respectively coupled to the plurality of control parts, and configured to adjust the position of each of the plurality of control parts in the accommodating space; A first fastening pin rotatably installed on the second body member, a second fastening pin rotatably installed on the third body member, and installed on the first body member and supported by the first fastening pin a fastening member including a first fastening hook and a second fastening hook disposed spaced apart from the first fastening hook and supported by the second fastening pin; And a controller for controlling each of the plurality of position adjusting members by measuring heights of each of the first pipe and the second pipe in the accommodation space, wherein the discharge member is configured to communicate with the accommodation space. It is installed at a position adjacent to the opening hole of the second body member, has a space therein, has a plurality of filter fitting grooves recessed inward in the lower inner wall body, and has a rotatable cover on the top thereof, A discharge member body having a suction port on one side and an exhaust port on the other side; A metal mesh installed at the inlet of the discharge member body to filter welding fume generated during welding and formed of a mesh structure of a metal material; a fan installed in an exhaust port of the discharge member body, receiving power from the outside and discharging air in the accommodation space to the outside; A plurality of exhaust grilles arranged side by side on the outside of the fan among the exhaust ports of the exhaust member body; a first filter inserted into the discharge member body, fitted into the filter fitting groove, and a first filter made of a mineral material and a second filter made of a HEPA filter; a conductive non-woven fabric disposed between the exhaust grill and the fan and coated with nano-aluminum particles, wherein the position adjusting member includes: a pair of first adjusting shafts, one end of which is coupled to lower sides of both sides of the support part; A pair of control bars through which the first control shaft passes through one end thereof and coupled in a left-hand or right-hand screw manner; a pair of second control shafts, one end of which penetrates the other end of the control bar and is coupled in a right-hand or left-hand screw manner, and the other end is rotatably coupled to any one of the first body member to the third body member; a pair of power motors that provide rotational driving force to the pair of control bars, respectively, and whose driving is controlled by the controller; And the controller individually controls driving of a pair of power motors of each of the plurality of position adjusting members so that the second pipe and the first pipe are coaxially positioned.

The plurality of support parts are spaced apart from the first body member to the third body member along the longitudinal direction in which the first pipe and the second pipe extend, and the support part has the seating groove formed thereon. a support body whose both sides are coupled to inner walls of the first body member to the third body member; It is possible to contact the first pipe and the second pipe, and longitudinal movement of the first pipe and the second pipe in a state in contact with the first pipe and the second pipe and the first pipe and the second pipe A plurality of roller members rotatably installed in the seating groove of the support body to guide the rotation (rotation) of the pipe; a sensing member for sensing whether the first pipe or the second pipe is in contact with the plurality of roller members; It is connected to the sensing member inside the support body, and selectively selects at least one of the first pipe and the second pipe according to whether the first pipe and the second pipe are in contact with the plurality of roller members. and a manpower member configured to apply manpower, wherein the manpower member includes: a power generator configured to generate power; A plurality of magnet bodies electromagnetically connected to the power generator, configured to generate magnetic force by receiving power, and disposed adjacent to the seating groove inside the support body, wherein the roller member includes , a pair of hubs spaced apart from each other; a plurality of passive rollers disposed between the pair of hubs and disposed with an inclination of 45° along an outer circumferential surface of the pair of hubs; a plurality of drive roller shafts inserted into the center of the plurality of passive rollers to be relatively rotatable, and both ends thereof being rotatably supported by the pair of hubs, respectively; a support ring disposed inside the pair of hubs and in close contact with inner surfaces of the plurality of passive rollers to support loads applied to the plurality of passive rollers; and a rotation inductor for inducing the support ring to rotate together with the passive roller, wherein the rotation inductor includes: a rotation induction shaft inserted into the center of the pair of hubs; and a plurality of first bearings inserted into the rotary inductor shaft to be rotatable relative to the rotary inductor shaft and having the support ring fixed to the outer circumferential surface thereof, wherein the support ring comprises a curved outer circumferential surface of the passive roller. Correspondingly, a recessed groove recessed inward is formed on an outer circumferential surface thereof to surround and support the passive roller, the outer circumferential surface of the recessed groove is subjected to friction surface treatment (Knurling), and the pair of hubs are a first hub member. and a second hub member disposed to face the first hub member, the first hub member passing through the first hub member, extending obliquely, and an edge portion of the first hub member. A plurality of guide slits disposed spaced apart along the circumferential direction; a plurality of second bearings into which the plurality of drive roller shafts are inserted and movably coupled to the plurality of guide slits; and is installed in the plurality of guide slits, supports each of the plurality of second bearings, and extends along the direction in which the plurality of guide slits extend so as to adjust the position of the second bearing in the plurality of guide slits. It includes; a plurality of control units formed to be retractable.

A fixing unit detachably coupled to the body and fixing at least one of the first pipe and the second pipe when the welding torch is introduced into the accommodation space; further comprising the observation unit, , Observation unit body rotatably coupled to the second body member, the inside of which passes through; a see-through member coupled to the observation unit body to cover the penetrating portion of the observation unit body and made of heat-resistant glass material to visually check the accommodation space; and a coating layer formed on the surface of the see-through member and formed of any one of an Al ₂ O ₃ material and a Y ₂ O ₃ material to have light transmittance and corrosion resistance, wherein the coating layer has a refractive index of the see-through member. smaller than the refractive index, the coating layer has a transmittance of 92% to 96%, the coating layer is formed on the top, bottom and side surfaces of the see-through member, and the coating layer is plasma applied in a temperature atmosphere of 80 ° C to 300 ° C is applied to the surface of the see-through member by an atomic layer deposition (ALD) method, and the observation unit is installed on the body of the observation unit and further includes a light irradiation member for irradiating light into the accommodation space. And, the fixing part, a fixing part body coupled to at least one of both sides of the open side of the body part; a plurality of lining members disposed along an outer circumferential surface of at least one of the first pipe and the second pipe; a friction member disposed on a surface facing at least one of the first pipe and the second pipe in the plurality of lining members; a cylinder member connected to the plurality of lining members, stretchable and contractible, and coupled to the plurality of lining members so as to adjust a distance between the plurality of lining members; A power motor member capable of generating power and connected to the cylinder member; a detection sensor capable of detecting the inflow of the welding torch in the accommodation space; It is connected to the detection sensor, and when the detection sensor detects the retraction of the welding torch, a control member for controlling the driving of the power motor member; includes.

A fixing part detachably coupled to the body part and fixing at least one of the first pipe and the second pipe when the welding torch is introduced into the accommodation space; further comprising the second pipe. The body member includes a pair of guide ribs protruding from both sides of the opening hole and having concave-convex protrusions at their ends, and the observation unit is slidably coupled to the second body member and has a lower portion thereof so that the guide ribs are inserted. Is recessed inward, includes a guide slit having a concave-convex groove engaged with the concave-convex protrusion in the concave interior, the observation unit body through which the inside penetrates; a see-through member coupled to the observation unit body to cover the penetrating portion of the observation unit body and made of heat-resistant glass material to visually check the accommodation space; and a coating layer formed on the surface of the see-through member and formed of any one of an Al ₂ O ₃ material and a Y ₂ O ₃ material to have light transmittance and corrosion resistance, wherein the coating layer has a refractive index of the see-through member. smaller than the refractive index, the coating layer has a transmittance of 92% to 96%, the coating layer is formed on the top, bottom and side surfaces of the see-through member, and the coating layer is plasma applied in a temperature atmosphere of 80 ° C to 300 ° C is applied to the surface of the see-through member by an atomic layer deposition (ALD) method, and the observation unit is installed on the body of the observation unit and further includes a light irradiation member for irradiating light into the accommodation space. And, the fixing part, a fixing part body coupled to at least one of both sides of the open side of the body part; a plurality of lining members disposed along an outer circumferential surface of at least one of the first pipe and the second pipe; a friction member disposed on a surface facing at least one of the first pipe and the second pipe in the plurality of lining members; a cylinder member connected to the plurality of lining members, stretchable and contractible, and coupled to the plurality of lining members so as to adjust a distance between the plurality of lining members; A power motor member capable of generating power and connected to the cylinder member; a detection sensor capable of detecting the inflow of the welding torch in the accommodation space; It is connected to the detection sensor, and when the detection sensor detects the retraction of the welding torch, a control member for controlling the driving of the power motor member; includes.

According to the present invention, it is possible to prevent sparks generated during welding from being scattered to the outside.

In addition, when the welded portion of the pipe is misaligned or a predetermined gap is generated in the welded portion, the welded portion may be readjusted and welded.

In addition, after first supporting any one pipe among the plurality of pipes, it is possible to precisely engage the welded portion with each other by supporting the other pipe. Thus, the welding operation can be performed more elaborately.

1 is a diagram showing the structure of a spark scattering prevention device according to an embodiment of the present invention.
Figure 2 is a view showing a state in which the first pipe and the second pipe are seated in the spark scattering prevention device according to an embodiment of the present invention, and the first pipe is supported.
3 is a view showing a state in which the second pipe seated in the spark scattering prevention device according to an embodiment of the present invention is supported.
Figure 4 is a cross-sectional view showing a first body member and a second body member in the spark scattering prevention device according to an embodiment of the present invention.
5 is a view showing the structure of a discharge member according to an embodiment of the present invention.
6 is a diagram showing the structure of an observation unit according to an embodiment of the present invention.
7 is a view showing the structure of a roller member according to an embodiment of the present invention.
8 is an exploded perspective view showing the structure of a roller member according to an embodiment of the present invention.
9 is a diagram showing the structure of a spark scattering prevention device according to another embodiment of the present invention.
10 is a diagram showing the structure of a spark scattering prevention device according to another embodiment of the present invention.
FIG. 11 is a cross-sectional view taken along line A-A' of FIG. 10;
12 is a view showing a state in which the pressing unit pressurizes the first pipe according to another embodiment of the present invention.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, since various changes can be made to the embodiments, the scope of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents or substitutes to the embodiments are included within the scope of rights.

Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only, and may be modified and implemented in various forms. Therefore, the embodiments are not limited to the specific disclosed form, and the scope of the present specification includes changes, equivalents, or substitutes included in the technical spirit.

Although terms such as first or second may be used to describe various components, such terms should only be construed for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element.

It should be understood that when an element is referred to as being “connected” to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle.

Terms used in the examples are used only for descriptive purposes and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiment belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

In addition, in the description with reference to the accompanying drawings, the same reference numerals are given to the same components regardless of reference numerals, and overlapping descriptions thereof will be omitted. In describing the embodiment, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the embodiment, the detailed description will be omitted.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims.

In the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, are the same as those commonly understood by one of ordinary skill in the art to which the present invention belongs. It has meaning. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the embodiments of the present invention, an ideal or excessively formal meaning not be interpreted as

The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative, so the present invention is not limited to the details shown. In addition, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. When 'includes', 'has', 'consists of', etc. mentioned in this specification is used, other parts may be added unless 'only' is used. In the case where a component is expressed in the singular, the case including the plural is included unless otherwise explicitly stated.

In interpreting the components, even if there is no separate explicit description, it is interpreted as including the error range.

In the case of a description of a positional relationship, for example, 'on top of', 'on top of', 'at the bottom of', 'next to', etc. Or, unless 'directly' is used, one or more other parts may be located between the two parts.

When an element or layer is referred to as “on” another element or layer, it includes all cases where another element or layer is directly on top of another element or another layer or other element intervenes therebetween. Like reference numbers designate like elements throughout the specification.

The size and thickness of each component shown in the drawings are shown for convenience of description, and the present invention is not necessarily limited to the size and thickness of the illustrated components.

Each feature of the various embodiments of the present invention can be partially or entirely combined or combined with each other, and as those skilled in the art can fully understand, various interlocking and driving operations are possible, and each embodiment can be implemented independently of each other. It may be possible to implement together in an association relationship.

1 is a view showing the structure of a spark scattering prevention device according to an embodiment of the present invention, and FIG. 2 is a spark scattering prevention device according to an embodiment of the present invention. A first pipe and a second pipe are seated, It is a view showing a state in which a first pipe is supported, and FIG. 3 is a view showing a state in which a second pipe seated in a spark scattering prevention device according to an embodiment of the present invention is supported, and FIG. A cross-sectional view showing the first body member and the second body member in the spark scattering prevention device according to an embodiment, Figure 5 is a view showing the structure of the discharge member according to an embodiment of the present invention, Figure 6 is the present invention A view showing the structure of an observation unit according to an embodiment of, Figure 7 is a view showing the structure of a roller member according to an embodiment of the present invention, Figure 8 is a view of the roller member according to an embodiment of the present invention It is an exploded perspective view showing the structure.

In the following, the structure of the spark scattering prevention device 100 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8 .

The spark scattering prevention device 100 according to an embodiment of the present invention includes a body portion 110, a support portion 120, and an observation portion 130. More specifically, the spark prevention device 100 is a device for preventing scattering of sparks generated from a welding torch (not shown) when welding the first pipe 10 and the second pipe 20, The body portion 110 having an accommodation space 110a and having an insertion hole 112a for the welding torch to be introduced into the accommodation space 110a and an open hole 112b communicating with the accommodation space 110a. A plurality of support parts 120 inserted into the receiving space 110a of 110 and having seating grooves 121a recessed inward so that the first pipe 10 and the second pipe 20 can be seated, open It is movably installed in the body so as to cover the hole 112b, whether the first pipe 10 and the second pipe 20 are connected, and whether the first pipe 10 and the second pipe 20 ) includes an observation unit 130 at least partially made of a transparent material so as to check the connection point. Here, the above-mentioned connection point (corresponding to the contact portion shown in FIG. 1 ) may be a portion in contact with each other when the first pipe 10 and the second pipe 20 are contacted.

The body part 110 first supports at least one of the first pipe 10 and the second pipe 20 through the plurality of support parts 120 and then the other one of the first pipe 10 and the second pipe 20. It is configured to support later. The body portion 110 includes a first body member 111, a second body member 112, a third body member 113, a discharge member 114, a position adjusting member 115, a fastening member (not shown), and controller 116. In addition, the body portion 110 may further include a support member (not shown) inserted into the first body member 111 to the third body member 113 for fixing and supporting the support portion 120. can

In the first body member 111, some of the plurality of support parts 120 are accommodated. The first body member 111 forms the lower portion of the body portion 110 . Here, the above-described lower part may be the lower part based on the vertical direction shown in FIG. 1 . The first body member 111 is provided with at least two support parts 120 spaced apart along the longitudinal direction.

In addition, the sensing member 123 is installed on the inner wall of one side of the first body member 111 based on the crossing direction. Here, the crossing direction is a direction perpendicularly orthogonal to the vertical direction and a direction perpendicularly orthogonal to the longitudinal direction.

The second body member 112 is rotatably coupled to the first body member 111 . The second body member 112 is rotatably coupled to the first body member 111 in the longitudinal direction as a central axis of rotation. For example, the second body member 112 is coupled to one side of the first body member 111 based on the longitudinal direction. In the second body member 112, another part of the plurality of support parts 120 is accommodated, and an insertion hole 112a and an open hole 112b are formed.

The third body member 113 is rotatably coupled to the first body member 111 at a position adjacent to the second body member 112 and the remaining part of the plurality of support parts 120 is accommodated therein. The third body member 113 is rotatably coupled to the first body member 111 in the longitudinal direction as a central axis of rotation. For example, the third body member 113 is biasedly coupled to the other side of the first body member 111 based on the longitudinal direction. Here, the space formed by the first body member 111, the second body member 112, and the third body member 113 may be the accommodating space 110a.

Meanwhile, both sides of the first body member 111, the second body member 112, and the third body member 113 are opened in the longitudinal direction.

The discharge member 114 is installed on at least one of the first body member 111 to the third body member 113 and discharges harmful gases generated during welding from the receiving space 110a to the outside of the body portion 110. let it

The discharge member 114 is connected to the second body member 112, and a plurality of filters (first filter 114e and second filter 114f) are detachably installed therein, and the filter (first filter ( A fan 114c is installed outside 114e) and the second filter 114f) to filter the air inside the welding space and discharge it to the outside. More specifically, the discharge member 114 includes a discharge member body 114a, a metal mesh 114b, a fan 114c, an exhaust grill 114d, filters (first filter 114e and second filter 114f) , including a nonwoven fabric (114g).

The discharge member body 114a has a suction port 114ac formed on a surface facing the side wall opening 112d formed in the second body member 112 of the body portion 110, and on the opposite side of the suction port 114ac. An exhaust port 114ad is formed, and a cover 114ab is installed on one side.

In addition, the discharge member body (114a) has a filter fitting groove (114aa) is formed on the bottom and both side walls to facilitate inserting the filters (first filter (114e) and second filter (114f) from top to bottom.

A cover 114ab is installed on the top of the discharge member body 114a to open the cover 114ab and replace or clean the internal filters (first filter 114e and second filter 114f).

The metal mesh 114b is attached to the inlet 114ac of the discharge member body 114a, while preventing large-sized foreign substances (welding by-products) from entering the receiving space 110a, and primarily reducing welding sparks. will act as a barrier.

The fan 114c is installed in the exhaust port 114ad and operates based on the power supply of a power supply (not shown) to discharge the air introduced from the inside of the receiving space 110a where welding takes place to the outside. (114c) An exhaust grill (114d) is installed on the outside.

The filters (first filter 114e and second filter 114f) are continuously installed between the metal mesh 114b and the fan 114c, and slide from top to bottom through the filter fitting groove 114aa as described above. inserted in a way.

As for the filters (first filter 114e and second filter 114f), the first filter 114e and the second filter 114f are continuously installed from the inside to the outside. At this time, it is preferable that the first filter 114e is made of an inorganic filter based on a mineral material, and the second filter 114f is a HEPA filter. Inorganic filters based on mineral materials are commonly used for water treatment and are known to adsorb foreign substances in water. On the other hand, as the first filter 114e, it is preferable to use zeolite or illite among inorganic filters, which are processed into spherical balls by washing and heat-treating, and filled in a certain case. Since the inorganic filter is installed at the inlet side, it is possible to protect the HEPA filter at the rear end from welding sparks. Zeolite is a microporous aluminum silicate mineral that is durable and has characteristics of trapping minute ions. In particular, since zeolite has a high adsorption heat capacity, it exhibits a function of absorbing heat generated during welding from the receiving space 110a and then discharging it to the outside according to the operation of the fan. As is well known, HEPA filters can separate fine particles or bacteria at a very high level, so they are often used in vacuum cleaners or sterile rooms, and they play a role in filtering out a large number of fine particles filtered out primarily by the zeolite filter.

The non-woven fabric 114g is a conductive non-woven fabric coated with nano-aluminum particles, which is coated with aluminum nano-particles on a general non-woven fabric, and is known to be more than 10 times more efficient than conventional HEPA filters for removing fine dust. Since the non-woven fabric 114g is coated with nano-aluminum particles, when the non-woven fabric 114g is installed on the outermost side, it is not only less likely to be damaged from heat such as welding sparks, but also clean for semiconductor manufacturing, which requires a very high level of air cleaning environment. It is possible to perform welding work using the welding cover of the present invention in a room.

The position adjusting member 115 is installed on each of the first body member 111 to the third body member 113, is coupled to each of the plurality of support parts 120, and has a plurality of support parts 120 in the receiving space 110a. Each position can be adjusted. The position control member 115 includes a pair of first control shafts 115a, a pair of control bars 115b, a pair of second control shafts 115c, and a power motor 115d. That is, the position adjusting member 115 adjusts the position of each support part 120 supporting the first pipe and the second pipe 20, so that the first pipe 10 and the second pipe 20 are in close contact. When the parts are displaced from each other, the positions of the plurality of support parts 120, the first pipe 10, and the second pipe 20 are adjusted so that they can be engaged with each other.

The first control shafts 115a are provided as a pair, and one end thereof is coupled to lower portions of both sides of the support part 120 . Here, the first control shaft 115a is rotatably coupled to lower portions of both sides of the support 120 .

The control bars 115b are provided as a pair, and the first control shaft 115a passes through one end thereof and is coupled in a left-hand or right-hand screw manner.

The second control shaft 115c is provided as a pair, one end of which penetrates the other end of the control bar 115b and is coupled in a right-hand screw or left-hand screw method, and the other end is connected to the first body member 111 to the third body member It is rotatably coupled to any one of (113).

The power motor 115d provides rotational driving force to each of the pair of control bars 115b, and the driving is controlled by a controller 116 to be described later. That is, when the power motor 115d is operated, the control bar 115b rotates, and the distance between the first control shaft 115a and the second control shaft 115c is interlocked with the rotation of the control bar 115b. It can be spaced apart or close together.

The fastening member (not shown) includes a first fastening pin rotatably installed on the second body member 112, a second fastening pin rotatably installed on the third body member 113, and a first body member ( 111) and includes a first fastening hook installed on the first fastening pin and supported by the first fastening pin, and a second fastening hook disposed spaced apart from the first fastening hook and supported by the second fastening pin. Thus, the second body member 112 and the third body member 113 can maintain a state in which they are coupled to the first body member 111 .

The controller 116 measures the respective heights of the first pipe 10 and the second pipe 20 within the accommodating space 110a and controls the plurality of position adjusting members 115, respectively. That is, the controller 116 checks the arrangement state of each of the first pipe 10 and the second pipe 20, and the position adjusting member according to the arrangement state of each of the first pipe 10 and the second pipe 20 115 may be respectively controlled to adjust the disposition of the first pipe 10 and the second pipe 20 so that the first pipe 10 and the second pipe 20 can be bonded to each other in the correct position.

In addition, the controller 116 may individually control the driving of the pair of power motors 115d of each of the plurality of position adjusting members 115 so that the second pipe 20 and the first pipe 10 are positioned coaxially. can For example, the controller 116 may be coupled to the inner wall of the second body member 112 .

The support member (not shown) is formed so that at least a portion of the sidewall of the first body member 111 to the third body member 113 penetrates in the cross direction, and a plurality of recessed grooves formed in the support part 120 (not shown). ) is formed to be inserted into any one of the The support member is rotatably formed on sidewalls of the first body member 111 to the third body member 113 .

More specifically, the support member includes a support member body rotatably coupled to the first body member 111 to the third body member 113, and protruding from an end of the support member body to be selectively inserted into a plurality of recessed grooves. Possible support protrusions (not shown) are formed.

Here, the support protrusion is inserted into the through hole formed in the sidewall of the first body member 111 to the third body member 113 and is inserted and supported into the plurality of recessed grooves. On the other hand, the support member has one end inserted into and fixed to the support member body so that the support member body is elastically supported in a direction in which the support member body is inserted into the through hole, and an elastic restoring force is imparted to the support member body, and the other end thereof is inserted into the first body. A torsion spring coupled to and supported by the member 111 to the third body member 113 is formed to be stretchable and contractible.

The support part 120 is provided in plurality, and the first body member 111 to the third body member 113 are provided along the longitudinal direction (see FIG. 1) in which the first pipe 10 and the second pipe 20 extend. It is spaced apart and supports the first pipe 10 and the second pipe 20. The support part 120 includes a support part body 121, a roller member 122, a sensing member 123, and a manpower member 124. Meanwhile, in the following description of the structure of the support body 121, the roller member 122, the sensing member 123, and the manpower member 124, the support portion of the support portion 120 coupled to the first body member 111 The body 121, the roller member 122, the sensing member 123, and the manpower member 124 will be described as standard.

The support body 121 is inserted and fixed into the first body member 111 to the third body member 113. The side of the support body 121 is formed with the above-described recessed groove coupled to the support protrusion of the support member. In addition, the support body 121 is formed with a seating groove 121a concavely recessed inward on its upper part.

The roller member 122 is provided in plurality, is capable of contacting the first pipe 10 and the second pipe 20, and is in contact with the first pipe 10 and the second pipe 20 while the first pipe (10) and the second pipe 20 in the longitudinal direction movement and the first pipe 10 and the second pipe 20 in the seating groove (121a) of the support body 121 to guide the rotation (rotation) installed rotatably. The roller member 122 is rotatably spaced apart and installed in the seating groove 121a along the circumferential direction of a circle having the longitudinal direction as the central axis.

The roller member 122 is rotatably installed on the support body 121, and at least a portion protrudes outward from the seating groove 121a. The roller member 122 may include a hub 122a, a passive roller 122b, a drive roller shaft 122c, a support ring 122d, and a rotary inductor 122e.

The hub 122a may be a part constituting the body of the roller member 122 . The hub 122a serves as a central body and a central fixing frame of the roller member 122, and has a plate shape as a whole, but as shown, may have a polygonal shape when observed on a plane. . The polygonal corners of the hub 122a can be set in various ways, and if it is formed in an octagonal shape and designed to have a total of 8 corners, a total of 8 passive rollers 122b described later will be provided and coupled to the hub 122a. can Here, the number of polygon corners of the hub 122a may be designed in consideration of the total number of combined passive rollers 122b. To this end, the hub 122a may include a first hub member 122aa and a second hub member 122ab. The first hub member 122aa and the second hub member 122ab may have the same shape as each other.

The first hub member 122aa may include a guide slit 122aaa, a second bearing 122aab, and a plurality of adjustment units 122aac.

The guide slit 122aaa is formed through the first hub member 122aa and may extend obliquely. A plurality of guide slits 122aaa are provided, and may be spaced apart from each other along the circumferential direction at the edge of the first hub member 122aa.

A plurality of second bearings 122aab may be provided, and may be movably inserted into the plurality of guide slits 122aaa along an extending direction of the plurality of guide slits 122aaa. The driving roller shaft 122c may be rotatably inserted into the second bearing 122aab.

A plurality of control units 122aac may be provided, and each may be installed in the guide slit 122aaa. The adjustment unit 122aac supports the second bearing 122aab and may adjust the position of the second bearing 122aab within the guide slit 122aaa. That is, the control unit 122aac may be extended or contracted along the direction in which the guide slit 122aaa extends. The control unit 122aac may be provided as a cylinder. Here, the adjustment unit 122aac may support one end of the second bearing 122aab, and a spring may be provided at the other end to elastically support the second bearing 122aab. Meanwhile, the control unit 122aac is provided as a pair to support both ends of the second bearing 122aab, and when one control unit 122aac is extended, the other control unit 122aac may be contracted. Accordingly, the position of the second bearing 122aab may be changed within the guide slit 122aaa by driving the pair of control units 122aac. Accordingly, while the position of the second bearing 122aab is adjusted, the disposition of the drive roller shaft 122c inserted into the second bearing 122aab is changed, and the passive roller 122b penetrated through the drive roller shaft 122c. ) can be changed. Accordingly, as the arrangement angle of the passive roller 122b is changed, the rotation degree of the roller member 122 may be changed when the first pipe 10 and the second pipe 20 are moved.

The passive roller 122b may be formed in a cylindrical shape having a larger diameter at its center than at both ends thereof. A plurality of passive rollers 122b may be provided, and each may be arranged in an oblique line with respect to the circumferential direction of the hub 122a. Accordingly, when the roller member 122 rotates, rotational force for rotating the first pipe 10 and the second pipe 20 is provided to the first pipe 10 and the second pipe 20 in contact, and at the same time, Force may be provided along a longitudinal direction that is a central axis in the direction of rotation. That is, the plurality of passive rollers 122b arranged obliquely rotate the first pipe 10 and the second pipe 20 and simultaneously move them in the longitudinal direction. For example, a structure in which a plurality of passive rollers 122b are provided in the hub 122a may be provided as a Mecanum wheel.

The driving roller shaft 122c is inserted into the passive roller 122b to be relatively rotatable, and both ends thereof may be inserted into the second bearing 122aab.

The support ring 122d is disposed inside the pair of hubs 122a and may be in close contact with inner surfaces of the plurality of passive rollers 122b to support loads applied to the plurality of passive rollers 122b. Accordingly, deformation or damage of the plurality of passive rollers 122b can be suppressed or prevented.

The rotary inductor 122e may guide the support ring 122d to rotate together with the passive roller 122b. The rotary inductor 122e is formed to be capable of relative rotation with respect to the rotary inductor shaft 122ea on the rotary inductor shaft 122ea formed at the inner center of the hub 122a and the rotary inductor shaft 122ea, and a support ring on the outer circumferential surface. (122d) may include a plurality of first bearings (122eb) coupled.

The support ring 122d is not affected by the rotation of the hub 122a through the rotation inductor 122e, and the first bearing ( 122eb), the friction with the support ring 122d due to the rotation of the passive roller 122b is minimized to prevent the passive roller 122b from being unnecessarily worn due to friction, and at the same time, the support ring 122d Stable rotation of the passive roller 122b may be induced by not interfering with the rotation of the passive roller 122b. In this case, the annular support ring 122d may have a shape that does not interfere with each other when the inclined passive roller 122b rotates 360°.

A recessed groove 122da capable of stably surrounding and supporting the passive roller 122b may be formed on an outer circumferential surface of the support ring 122d in response to an outer circumferential curve of the passive roller 122b. In addition, the support ring 122d may have a friction surface treatment (knurling) on the outer circumferential surface of the recessed groove 122da.

The recessed groove 122da with friction surface treatment is a structure in which high frictional force is generated with the passive roller 122b when the passive roller 122b in close contact with the support ring 122d is separated or tilted to one side. It is possible to more effectively prevent the separation of the passive roller 122b through the ring 122d or the phenomenon of leaning to one side.

The support ring 122d in contact with the passive roller 122b is easily rotated in response to the passive roller 122b through the friction surface treatment structure formed on the support ring 122d, so that the support ring 122d Interference (obstruction) of the rotation of the passive roller 122b, which may occur due to failure to smoothly compensate for the rotation of the passive roller 122b, can be minimized, so that stable operation (driving) of the roller member 122 can be induced.

In addition, due to the recessed groove 122da formed in the support ring 122d, the contact area with the passive roller 122b is maximized to more stably support the passive roller 122b to prevent deformation of the passive roller 122b due to load or At the same time as effectively preventing damage, for example, it is possible to secure stability by binding the passive roller (122b) formed in the shape of a rugby ball to prevent shaking of the passive roller (122b) due to a large load.

The sensing member 123 detects whether the first pipe 10 or the second pipe 20 is in contact with the plurality of roller members 122 . The sensing member 123 may be provided as, for example, a racer sensor.

The manpower member 124 is connected to the sensing member 123 inside the support body 121, and depending on whether the first pipe or the second pipe 20 is in contact with the plurality of roller members 122, the first pipe (10) or is configured to selectively apply manpower to the second pipe (20). Here, the manpower member 124 applies an electromagnetic force to at least one of the first pipe 10 or the second pipe 20 so that the first pipe 10 or the second pipe 20 holds the support body 121 It can be pulled towards. The attraction member 124 includes a power generator 124a and a magnet body 124b.

The power generator 124a is configured to receive power from the outside or to generate power by itself.

The magnet body 124b is electromagnetically connected to the power generator 124a (for example, connected by wires), is configured to generate magnetic force by receiving power, and has a seating groove in the support body 121 ( 121a). A plurality of magnet bodies 124b are provided and spaced apart from each other in the circumferential direction along the circumference of the seating groove 121a. For example, the magnet body 124b may be provided as an electromagnet.

The observation part 130 is movably installed on the body part 110 so as to cover the open hole 112b, and determines whether or not the first pipe 10 and the second pipe 20 are connected and whether the first pipe 10 and the second pipe 20 are connected. At least a part is made of a transparent material so that a connection point (ie, a contact point) of the pipe 10 and the second pipe 20 can be confirmed. In addition, the observation unit 130 is a connection point between the first pipe 10 and the second pipe 20 (that is, when the worker proceeds to weld the first pipe 10 and the second pipe 20 with a welding torch). , contact point) also serves to provide a field of view to check. The observation unit 130 includes an observation unit body 131, a see-through member 132, and a coating layer 133. In addition to this, the observation unit 130 further includes a light irradiation member (not shown) installed on the observation unit body 131 and radiating light to the accommodation space 110a.

The observation unit body 131 is rotatably coupled to the second body member 112 and penetrates the inside thereof.

The see-through member 132 is coupled to the observation unit body 131 to cover the penetrating portion of the observation unit body 131, and is formed of a heat-resistant glass material so that the receiving space 110a can be visually confirmed.

The coating layer 133 is formed on the surface of the see-through member 132 and is formed of any one of an Al ₂ O ₃ material and a Y ₂ O ₃ material to have light transmittance and corrosion resistance.

The refractive index of the coating layer 133 is smaller than that of the see-through member 132 .

The coating layer 133 has transmittance of 92% to 96% and is formed on the top, bottom and side surfaces of the see-through member 132 .

The coating layer 133 is applied on the surface of the see-through member 132 by an atomic layer deposition (ALD) method by plasma applied in a temperature atmosphere of 80° C. to 300° C.

The light irradiation member serves to secure a user's visible range by irradiating light into the receiving space 110a.

9 is a diagram showing the structure of a spark scattering prevention device according to another embodiment of the present invention.

Referring to FIG. 9 , in the spark prevention device according to another embodiment of the present invention, the observation unit 130 is coupled to the body unit 110 in a sliding manner. To this end, the second body member 112 includes a pair of guide ribs 112c protruding from both sides of the open hole 112b and having concavo-convex protrusions (not shown) at their ends.

The observation unit body 131 is slidably coupled to the second body member, and the lower portion thereof is recessed inward so that the guide rib 112c is inserted, and a concavo-convex groove (not shown) engaged with the concavo-convex protrusion is provided in the recessed interior. It includes a guide slit (not shown) provided, and the inside penetrates so that the see-through member 132 is inserted. Accordingly, the observation unit 130 may open and close the open hole 112b in a sliding manner.

10 is a view showing the structure of a spark scattering prevention device according to another embodiment of the present invention, FIG. 11 is a cross-sectional view taken along the line AA' of FIG. 10, and FIG. 12 is another view of the present invention. It is a view showing a state in which the pressing unit pressurizes the first pipe according to the embodiment.

10 to 12, the spark scattering prevention device 100 according to another embodiment of the present invention is detachably coupled to at least one of both sides of the body portion 110, and the welding torch is accommodated. When entering the space 110a, at least one of the first pipe 10 and the second pipe 20 may be fixed. In the following, a case in which the fixing part 140 is provided on the side adjacent to the first pipe 10 among both sides of the body part 110 will be described as an example. but. The fixing part 140 may be provided on both sides of the body part 110 and may fix both the first pipe 10 and the second pipe 20 .

The fixing part 140 includes a fixing part body 141, a lining member 142, a friction member 143, a power motor member 145, a detection sensor 146, and a control member 147.

The fixing part body 141 is coupled to at least one of both open sides of the body part 110 . One side of the fixing body 141 is open to communicate with the receiving space 110a of the body 110 .

A plurality of lining members 142 are disposed along the outer circumferential surface of at least one of the first pipe 10 and the second pipe 20 .

The friction member 143 is disposed on one surface facing the first pipe 10 or the second pipe 20 in the plurality of lining members 142 .

The power motor member 145 is connected to a plurality of lining members 142, and is capable of elongation and contraction and is coupled to the plurality of lining members 142 so as to adjust the distance between the plurality of lining members 142.

The power motor member 145 can generate power and is connected to the cylinder member 144.

The detection sensor 146 may detect the entry of the welding torch in the receiving space 110a.

The control member 147 is connected to the detection sensor 146, and controls the driving of the power motor member 145 when the detection sensor 146 detects the retraction of the welding torch.

More specifically, the plurality of lining members 142 are disposed along the outer circumferential surface of the first pipe 10, and may move toward the rotational axis of the first pipe 10 to contact the first pipe 10. For example, a plurality of lining members 142 may be provided as a pair, spaced apart along the crossing direction and disposed on both sides of the first pipe 10 . For example, the plurality of lining members 142 may be formed in a crescent shape.

Meanwhile, the lining member 142 may include a lining arm 142a.

Lining arm (142a) is provided in plural, spaced apart along the cross direction, can be combined with a plurality of lining members 142, respectively. More specifically, the lower portion of the lining arm 142a is hinged with the fixing body 141 based on the vertical direction, and the upper portion is hinged with the power motor member 145 and the cylinder member 144. . In addition, a middle portion located between the upper and lower sides may be hinged with the lining member 142 .

Accordingly, the interval between the plurality of lining arms 142a may be narrowed by the elongation of the power motor member 145 and the cylinder member 144 to be described later, and as the interval between the lining arms 142a narrows together, the plurality of The spacing between the lining members 142 may also be narrowed. Therefore, the plurality of lining members 142 may pressurize the outer circumferential surface of the first pipe 10 to generate friction, and stop the first pipe 10 or rotate the first pipe 10 by friction. can reduce speed.

The friction member 143 may increase friction between the plurality of lining members 142 and the first pipe 10, and may be provided on a surface facing the first pipe 10 in the plurality of lining members 142. can Here, the friction member 143 may be preferably provided in a shape corresponding to the outer circumferential surface of the first pipe 10 . For example, the friction member 143 may be formed in a bent thin plate shape. Meanwhile, the friction member 143 may be formed of a material having a high friction coefficient so as to increase friction with the first pipe 10 . Also, the friction member 143 may have a high surface roughness in contact with the first pipe 10 . However, structures and shapes of the plurality of lining members 142, lining arms 142a, and friction members 143 are not limited thereto and may vary.

The cylinder member 144 is coupled to a plurality of lining arms 142a and may be capable of expansion and contraction. Thus, the cylinder member 144 is stretched and contracted, and the plurality of lining arms 142a and the plurality of lining members 142 can be moved in the cross direction. That is, the cylinder member 144 contracts, narrows the gap between the plurality of lining arms 142a and the plurality of lining members 142, and brings the plurality of lining members 142 and the first pipe 10 into contact. can Alternatively, the cylinder member 144 extends, widens the gap between the plurality of lining arms 142a and the plurality of lining members 142, and opens the plurality of lining members 142 and the first pipe 10. can be put For example, the cylinder member 144 may be provided as an air cylinder, a hydraulic cylinder, or a pneumatic cylinder.

The power motor member 145 is coupled to the cylinder member 144 and is installed on the fixing body 141 to generate power. The cylinder member 144 can be extended or contracted by power generated by the power motor member 145, and a plurality of lining members 142 can pressurize the first pipe 10.

The detection sensor 146 may detect the entry of the welding torch in the receiving space 110a.

The control member 147 is connected to the detection sensor 146, and controls the driving of the power motor member 145 when the detection sensor 146 detects the retraction of the welding torch.

As such, according to the present invention, sparks generated during welding can be prevented from scattering to the outside. In addition, when the welded portion of the pipe is misaligned or a predetermined gap is generated in the welded portion, the welded portion may be readjusted and welded. In addition, after first supporting any one pipe among the plurality of pipes, it is possible to precisely engage the welded portion with each other by supporting the other pipe. Thus, the welding operation can be performed more elaborately.

Although the embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and may be variously modified and implemented without departing from the technical spirit of the present invention. . Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Therefore, other implementations, other embodiments, and equivalents of the claims are within the scope of the following claims.

100: spark scattering prevention device 110: body part
120: support unit 130: observation unit
140: fixed part

Claims (3)

As a spark prevention device for preventing scattering of sparks generated from a welding torch when welding a first pipe and a second pipe,
a body portion having an accommodation space therein, and having an insertion hole through which the welding torch is introduced into the accommodation space, and an open hole communicating with the accommodation space;
a plurality of support parts inserted into the receiving space of the body part and having seating grooves recessed into the inside so that the first pipe and the second pipe can be seated;
It is movably installed in the body so as to cover the open hole, and it is possible to check whether the first pipe and the second pipe are connected and the connection point of the first pipe and the second pipe. At least a part of the observation unit is made of a transparent material so as to include;
The body portion is configured to first support at least one of the first pipe and the second pipe through the plurality of support parts, and to support the other one of the first pipe and the second pipe later,
The body part,
a first body member accommodating some of the plurality of support members;
a second body member rotatably coupled to the first body member, receiving another part of the plurality of support members, and having the insertion hole and the opening hole formed therein;
a third body member in which the remaining part of the plurality of support members is accommodated and rotatably coupled to the first body member at a position adjacent to the second body member;
a discharge member installed on at least one of the first body member to the third body member and discharging harmful gas generated during welding from the receiving space to the outside of the body portion;
a plurality of position adjusting members respectively installed on the first body member to the third body member, respectively coupled to the plurality of control parts, and configured to adjust the position of each of the plurality of control parts in the accommodating space;
A first fastening pin rotatably installed on the second body member, a second fastening pin rotatably installed on the third body member, and installed on the first body member and supported by the first fastening pin a fastening member including a first fastening hook and a second fastening hook disposed spaced apart from the first fastening hook and supported by the second fastening pin; and
A controller for controlling each of the plurality of position adjusting members by measuring the heights of each of the first pipe and the second pipe in the accommodation space,
The discharge member,
It is installed at a position adjacent to the opening hole among the second body members so as to communicate with the accommodation space, has a space therein, and has a plurality of filter fitting grooves recessed inward in the lower inner wall body, and rotates on the top thereof. A discharge member body having a possible cover and having a suction port on one side and an exhaust port on the other side;
A metal mesh installed at the inlet of the discharge member body to filter welding fume generated during welding and formed of a mesh structure of a metal material;
a fan installed in an exhaust port of the discharge member body, receiving power from the outside and discharging air in the accommodation space to the outside;
A plurality of exhaust grilles arranged side by side on the outside of the fan among the exhaust ports of the exhaust member body;
a first filter inserted into the discharge member body, fitted into the filter fitting groove, and a first filter made of a mineral material and a second filter made of a HEPA filter;
A conductive nonwoven fabric disposed between the exhaust grill and the fan and coated with nano aluminum particles;
The position adjusting member,
a pair of first control shafts, one end of which is coupled to both lower portions of the support part;
A pair of control bars through which the first control shaft passes through one end thereof and coupled in a left-hand or right-hand screw manner;
a pair of second control shafts, one end of which penetrates the other end of the control bar and is coupled in a right-hand or left-hand screw manner, and the other end is rotatably coupled to any one of the first body member to the third body member;
a pair of power motors that provide rotational driving force to the pair of control bars, respectively, and whose driving is controlled by the controller; and
The controller individually controls the driving of a pair of power motors of each of the plurality of position adjusting members so that the second pipe and the first pipe are positioned coaxially. delete The method of claim 1,
The plurality of support parts are spaced apart from the first body member to the third body member along the longitudinal direction in which the first pipe and the second pipe extend,
the support,
a support body having the seating groove formed thereon and having both sides thereof coupled to inner walls of the first body member to the third body member;
It is possible to contact the first pipe and the second pipe, and longitudinal movement of the first pipe and the second pipe in a state in contact with the first pipe and the second pipe and the first pipe and the second pipe A plurality of roller members rotatably installed in the seating groove of the support body to guide the rotation (rotation) of the pipe;
a sensing member for sensing whether the first pipe or the second pipe is in contact with the plurality of roller members;
It is connected to the sensing member inside the support body, and selectively selects at least one of the first pipe and the second pipe according to whether the first pipe and the second pipe are in contact with the plurality of roller members. Including; a manpower member configured to apply manpower;
The manpower member,
a power generator configured to generate power;
A plurality of magnet bodies electromagnetically connected to the power generator, configured to receive power and generate magnetic force, and disposed adjacent to the seating groove inside the support body;
The roller member,
A pair of hubs spaced apart from each other;
a plurality of passive rollers disposed between the pair of hubs and disposed with an inclination of 45° along an outer circumferential surface of the pair of hubs;
a plurality of drive roller shafts inserted into the center of the plurality of passive rollers to be relatively rotatable, and both ends thereof being rotatably supported by the pair of hubs, respectively;
a support ring disposed inside the pair of hubs and in close contact with inner surfaces of the plurality of passive rollers to support loads applied to the plurality of passive rollers;
Including; a rotating inductor for inducing the support ring to rotate together with the passive roller,
The rotary inductor,
a rotary induction shaft inserted into the center of the pair of hubs; and
A plurality of first bearings inserted into the rotary induction shaft to be relatively rotatable with respect to the rotary induction shaft and having the support ring fixed to an outer circumferential surface of the bearing;
The support ring forms a recessed groove recessed inward on its outer circumferential surface so as to surround and support the passive roller corresponding to the curved outer circumferential surface of the passive roller, and the outer circumferential surface of the recessed groove is subjected to friction surface treatment (Knurling). become,
The pair of hubs include a first hub member and a second hub member disposed to face the first hub member,
The first hub member,
a plurality of guide slits formed penetrating the first hub member, extending obliquely, and spaced apart from an edge portion of the first hub member along a circumferential direction;
a plurality of second bearings into which the plurality of drive roller shafts are inserted and movably coupled to the plurality of guide slits; and
It is installed in the plurality of guide slits, supports each of the plurality of second bearings, and expands and contracts along the direction in which the plurality of guide slits extend so as to adjust the position of the second bearing in the plurality of guide slits. A spark prevention device comprising a plurality of control units formed to be possible.

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