Adhesive tape switching mechanism for paperboard processing

文档序号:1034674 发布日期:2020-10-30 浏览:18次 中文

阅读说明:本技术 一种纸板加工用胶带转换机构 (Adhesive tape switching mechanism for paperboard processing ) 是由 王华文 于 2020-07-28 设计创作,主要内容包括:本发明公开了一种纸板加工用胶带转换机构,涉及纸板加工用胶带转换技术领域;为了解决纸板贴胶带工作的有序性和完整性问题;具体包括防尘箱,所述防尘箱的一侧外壁通过铰链连接有箱门,且防尘箱的正面外壁开有玻璃窗,防尘箱的底部一侧外壁设置有安装板,且安装板的背面一侧外壁通过连接板固定有支撑板,支撑板的顶部外壁设置有U型固定板,U型固定板的一端相对一侧外壁通过转轴固定有胶带卷,支撑板靠近胶带卷下方的外壁设置有两个固定架,且每个固定架的同侧外壁分别设置有第一导辊和第二导辊,且其中一个固定架靠近第二导辊下方的一侧外壁焊接有限位板。本发明提高了纸板胶带粘接的有效性和高效性。(The invention discloses an adhesive tape conversion mechanism for paperboard processing, and relates to the technical field of adhesive tape conversion for paperboard processing; the problems of orderliness and completeness of the work of sticking the adhesive tape on the paperboard are solved; the dustproof box comprises a dustproof box body, one side outer wall of the dustproof box body is connected with a box door through a hinge, a glass window is arranged on the front outer wall of the dustproof box body, a mounting plate is arranged on one side outer wall of the bottom of the dustproof box body, a supporting plate is fixed on one side outer wall of the back face of the mounting plate through a connecting plate, a U-shaped fixing plate is arranged on the top outer wall of the supporting plate, a rubber belt roll is fixed on one side outer wall, relative to one end of the U-shaped fixing plate, of the supporting plate, two fixing frames are arranged on the outer wall, close to the lower side of the rubber belt roll, of the supporting plate, a first guide roller and a second guide. The invention improves the effectiveness and the high efficiency of the paper board adhesive tape bonding.)

1. A tape switching mechanism for paperboard processing comprises a dust-proof box (1) and is characterized in that the outer wall of one side of the dust-proof box (1) is connected with a box door (2) through a hinge, the outer wall of the front side of the dust-proof box (1) is provided with a glass window (6), the outer wall of one side of the bottom of the dust-proof box (1) is provided with a mounting plate (11), the outer wall of one side of the back side of the mounting plate (11) is fixedly provided with a supporting plate (5) through a connecting plate (19), the outer wall of the top of the supporting plate (5) is provided with a U-shaped fixing plate (4), the outer wall of one side, opposite to one end of the U-shaped fixing plate (4), of the supporting plate (5) is fixedly provided with a tape roll (3) through a rotating shaft, the outer wall of the supporting plate (5) close to the lower side of the tape roll (3) is provided with two fixing frames (7), the, one side outer wall of limiting plate is provided with third deflector roll (10), and mounting panel (11) one side outer wall is opened there is the mounting hole, is provided with slide mechanism in the mounting hole, and slide mechanism is close to third deflector roll (10) one side and is provided with centre gripping cutting mechanism (12), one side outer wall that backup pad (5) are close to centre gripping cutting mechanism (12) is provided with pressing means.

2. The tape converting mechanism for cardboard processing according to claim 1, wherein the sliding mechanism comprises a first motor (16), a screw (17), a slider (18) and a guide slot, and both ends of the screw (17) are fixed on both side inner walls of the mounting hole through bearings, respectively, and the first motor (16) is fixed on one side outer wall of the mounting plate (11) through a bracket.

3. The tape converting mechanism of claim 2, wherein the output shaft of the first motor (16) is connected to one end of the screw (17) through a screw, the guide groove is formed in the outer wall of the back side of the mounting plate (11), the slider (18) is sleeved on the circumference of the screw (17), and the slider (18) and the guide groove form a sliding fit.

4. The tape converting mechanism for cardboard processing according to claim 1, characterized in that the clamping and cutting mechanism (12) comprises a first clamping plate (21), a second clamping plate (22), a protrusion (23), a gear (24), two rack plates (25), a second motor (26), a cutter (27) and a second air pump (28), wherein the second air pump (28) is arranged on one side outer wall of the sliding block (18), the end of the extension rod of the second air pump (28) is provided with a mounting seat, and the second motor (26) is arranged on one side outer wall of the mounting seat.

5. The tape converting mechanism for cardboard processing according to claim 4, wherein the gear (24) is sleeved on the output end of the second motor (26), the outer wall of the mounting seat near the two sides of the gear (24) is provided with a sliding groove, and the two sliding grooves are connected with a guide plate in a sliding way, one side outer wall of the two rack plates (25) is respectively arranged on one side of the two guide plates, and the two rack plates (25) and the gear (24) are meshed with each other.

6. The tape switching mechanism for cardboard processing according to claim 5, wherein the first clamping plate (21) and the second clamping plate (22) are welded to the outer wall of one side of the two rack plates (25), the cutter (27) is arranged on the bottom side of the first clamping plate (21), the cutter groove is opened on the top side of the second clamping plate (22), the cutter (27) is matched with the cutter groove, and the protrusion (23) is welded to the top of the second clamping plate (22).

7. The tape converting mechanism for cardboard processing according to claim 1, wherein the pressing mechanism comprises a limit roller (13), a sliding slot (14), a first air pump (15), a connecting shaft and a sliding sleeve (20), the sliding slot (14) is opened on the outer wall of one side of the support plate (5), and the sliding sleeve (20) is slidably connected in the sliding slot (14).

8. The tape converting mechanism for cardboard processing according to claim 7, wherein the connecting shaft is provided at the bottom end of the sliding sleeve (20), the position limiting roller (13) is fixed at the bottom end of the connecting shaft through a rotating shaft, and the first air pump (15) is fixed on the outer wall of the supporting plate (5) at the side near the top of the sliding slot (14) through a support plate.

9. The tape converting mechanism for cardboard processing according to claim 1, characterized in that the hinge (30) is welded to the outer wall of one side of the U-shaped fixing plate (4), the snap plate (29) is welded to the outer wall of one side of the hinge (30), and the outer wall of one side of the snap plate (29) is provided with a limit ring.

Technical Field

The invention relates to the technical field of adhesive tape conversion for paperboard processing, in particular to an adhesive tape conversion mechanism for paperboard processing.

Background

Corrugated cardboard is also called corrugated cardboard, is a multi-layer adhesive body, is formed by adhering at least one layer of wavy core paper interlayer (commonly called 'hole paper', 'corrugated core paper', 'corrugated paper core', 'corrugated raw paper') and one layer of cardboard (also called 'box board paper', 'box board'), has very high mechanical strength, can resist collision and falling in the process of transportation, and is widely used for manufacturing packing cartons for goods. In the process of manufacturing the carton, the corrugated board needs to be pasted with an adhesive tape.

Through retrieval, the Chinese patent with the application number of CN201820399405.0 discloses a tape switching mechanism for processing a paperboard, which comprises a short shaft and a cross bar fixed on cutting equipment, wherein a support plate along the conveying direction of a corrugated paperboard is fixed on the cross bar, and a first vertical plate and a second vertical plate are vertically fixed on the support plate; the minor axis is two, and the lower extreme at first riser and second riser is fixed respectively to the one end of two minor axes, and the other end of minor axis is fixed with the bearing. The adhesive tape switching mechanism for paperboard processing in the patent has the following defects: although the whole device performs the tape pasting work of the corrugated board, the effect of the adhesion degree between the tape and the corrugated board is not described in detail, and the cutting and the circulating pasting of the tape are not involved, so that a tape conversion mechanism for processing the corrugated board is needed.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides an adhesive tape conversion mechanism for paperboard processing.

In order to achieve the purpose, the invention adopts the following technical scheme:

a tape conversion mechanism for paperboard processing comprises a dust-proof box, wherein one side outer wall of the dust-proof box is connected with a box door through a hinge, the outer wall of the front side of the dust-proof box is provided with a glass window, the outer wall of one side of the bottom of the dust-proof box is provided with a mounting plate, the outer wall of one side of the back side of the mounting plate is fixedly provided with a supporting plate through a connecting plate, the outer wall of the top part of the supporting plate is provided with a U-shaped fixing plate, one end of the U-shaped fixing plate is fixedly provided with a tape roll through a rotating shaft relative to the outer wall of one side, the supporting plate is provided with two fixing frames close to the outer wall below the tape roll, the outer wall of the same side of each fixing frame is respectively provided with a first guide roller and a second guide roller, one side outer wall of one fixing frame close to the lower side, and a pressing mechanism is arranged on the outer wall of one side of the supporting plate close to the clamping and cutting mechanism.

Preferably: the sliding mechanism comprises a first motor, a screw rod, a sliding block and a guide groove, the two ends of the screw rod are fixed on the inner walls of the two sides of the mounting hole through bearings respectively, and the first motor is fixed on the outer wall of one side of the mounting plate through a support.

Further: the output shaft of the first motor is connected with one end of the screw rod through threads, the guide groove is formed in the outer wall of one side of the back face of the mounting plate, the sliding block is sleeved on the circumference of the screw rod, and the sliding block and the guide groove form sliding fit.

On the basis of the scheme: the clamping and cutting mechanism comprises a first clamping plate, a second clamping plate, a protrusion, a gear, two rack plates, a second motor, a cutter and a second air pump, the second air pump is arranged on the outer wall of one side of the sliding block, the end part of the extension rod of the second air pump is provided with a mounting seat, and the second motor is arranged on the outer wall of one side of the mounting seat.

The better scheme in the scheme is as follows: the gear cup joints in the output of second motor, and the outer wall that is close to the gear both sides of mount pad has the sliding tray, and sliding connection has the baffle in two sliding trays, and one side outer wall of two rack boards sets up respectively in one side of two baffles, two rack boards and gear intermeshing.

As a further scheme of the invention: first splint and second splint weld respectively on the outer wall of one side of two rack boards, and the cutter sets up in bottom one side of first splint, and open second splint top one side has the cutter groove, cutter and cutter groove looks adaptation, and the arch welds in the top of second splint.

Meanwhile, the pressing mechanism comprises a limiting roller, a sliding groove, a first air pump, a connecting shaft and a sliding sleeve, the sliding groove is formed in the outer wall of one side of the supporting plate, and the sliding sleeve is connected in the sliding groove in a sliding mode.

As a preferable aspect of the present invention: the connecting shaft is arranged at the bottom end of the sliding sleeve, the limiting idler wheel is fixed at the bottom end of the connecting shaft through the rotating shaft, and the first air pump is fixed on the outer wall of one side, close to the upper portion of the sliding groove, of the supporting plate through the supporting plate.

Simultaneously, the welding of one side outer wall of U type fixed plate has the articulated elements, and the welding of one side outer wall of articulated elements has the joint board, and one side outer wall of joint board is provided with the spacing ring.

The invention has the beneficial effects that:

1. the adhesive tape switching mechanism for paperboard processing drives the mounting seat to move towards the adhesive tape by starting the second cylinder, and enables the first clamping plate and the second clamping plate to be positioned above and below the adhesive tape, and drives the gear to rotate by starting the second motor, and drives the guide plates on one side of the two rack plates to slide in respective sliding grooves through the mutual meshing relationship between the gear and the two rack plates, at the moment, the first clamping plate and the second clamping plate which are connected with the two rack plates start to move towards opposite directions, when the first clamping plate and the second clamping plate are mutually attached, the cutter and the cutter groove are also mutually attached, so that the cutting work of the adhesive tape is completed, the effectiveness and the efficiency of the adhesive tape bonding of the paperboard are improved, and in the cutting process, the adhesive surface of the adhesive tape is bonded on the bulge on the second clamping plate, the adhesive tape is effectively prevented from loosening due to tightening force when being cut, therefore, the safety and continuity of the paperboard adhesive tape bonding are ensured.

2. This sticky tape shifter is used in cardboard processing has driven the sliding sleeve downstream in the spout through starting first air pump, and at this moment, spacing gyro wheel extrudees the sticky tape to drive the dust-proof box along with the guide rail and remove and carry out the roll extrusion work, from this, improved the adhesive degree between sticky tape and the cardboard, guaranteed the high quality that the sticky tape bonded.

3. This adhesive tape shifter for cardboard processing is connected fixedly with the spacing ring of joint board and the pivot of fixed adhesive tape book through the articulated elements to the loading and unloading and the change of adhesive tape book have been made things convenient for.

4. This sticky tape shifter is used in cardboard processing through starting first motor, and first motor drives the screw rod rotatory to make the slider can slide in screw rod and guide slot, and then guaranteed the centre gripping of its centre gripping cutting mechanism of one side to the sticky tape roll up the centre gripping of tip and cut efficiency.

5. According to the adhesive tape switching mechanism for paperboard processing, the whole device works in the dustproof box, so that the bonding surface of an adhesive tape can be effectively prevented from being polluted by dust.

Drawings

FIG. 1 is a schematic view of the overall structure of a tape switching mechanism for paperboard processing according to the present invention;

FIG. 2 is a schematic view of the internal structure of a tape switching mechanism for cardboard processing according to the present invention;

FIG. 3 is a schematic view of the back side structure inside the tape converting mechanism for cardboard processing according to the present invention;

FIG. 4 is a schematic structural view of a clamping and cutting mechanism in the tape switching mechanism for paperboard processing according to the present invention;

fig. 5 is a partial structural schematic view of a tape switching mechanism for paperboard processing according to the present invention.

In the figure: 1-dustproof box, 2-box door, 3-adhesive tape roll, 4-U-shaped fixing plate, 5-supporting plate, 6-glass window, 7-fixing frame, 8-first guide roller, 9-second guide roller, 10-third guide roller, 11-mounting plate, 12-clamping cutting mechanism, 13-limiting roller, 14-sliding groove, 15-first air pump, 16-first motor, 17-screw rod, 18-sliding block, 19-connecting plate, 20-sliding sleeve, 21-first clamping plate, 22-second clamping plate, 23-protrusion, 24-gear, 25-rack plate, 26-second motor, 27-cutter, 28-second air pump, 29-clamping plate and 30-hinged piece.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

A tape switching mechanism for paperboard processing is disclosed, as shown in figures 1-5, and comprises a dust-proof box 1, wherein one side outer wall of the dust-proof box 1 is connected with a box door 2 through a hinge, the front outer wall of the dust-proof box 1 is provided with a glass window 6, the bottom side outer wall of the dust-proof box 1 is fixed with a mounting plate 11 through a bolt, the back side outer wall of the mounting plate 11 is fixed with a support plate 5 through a connecting plate 19, the top outer wall of the support plate 5 is fixed with a U-shaped fixing plate 4 through a bolt, one end of the U-shaped fixing plate 4 is fixed with a tape roll 3 through a rotating shaft, the outer wall of the support plate 5, which is close to the lower part of the tape roll 3, is fixed with two fixing frames 7 through bolts, the outer wall of the same side of each fixing frame 7 is respectively fixed with a first guide roller 8 and a, a third guide roller 10 is fixed on the outer wall of one side of the limiting plate through a bearing, an installation hole is formed in the outer wall of one side of the installation plate 11, a sliding mechanism is arranged in the installation hole, a clamping and cutting mechanism 12 is arranged on one side, close to the third guide roller 10, of the sliding mechanism, and a pressing mechanism is arranged on the outer wall of one side, close to the clamping and cutting mechanism 12, of the supporting plate 5; when in use, the dustproof box 1 is fixed on a sliding plate of a guide rail, one end of the adhesive tape roll 3 is respectively wound on the first guide roller 8, the second guide roller 9 and the third guide roller 10, one end of the adhesive tape roll 3 is fixed by the clamping and cutting mechanism 12, the clamping and cutting mechanism 12 slides from one end close to the third guide roller 10 to one end of the support plate 5 by starting the sliding mechanism, so that the adhesive tape end positioned on the clamping and cutting mechanism is pulled out for a large section, the pressing mechanism is started to press the pulled-out adhesive tape, and the sliding plate on the guide rail drives the dustproof box 1 to move during the period, so that the adhesive effect of the adhesive tape on a paperboard is promoted, the adhesive degree of the adhesive tape and the paperboard surface is ensured, the clamping and cutting mechanism 12 is kept in a loose state in the moving process of the dustproof box 1, when the length of the adhesive tape reaches the length of the paperboard, the clamping and cutting mechanism 12 is started to move to one end close to the third guide roller 10, and the adhesive tape is cut by the clamping and cutting mechanism 12, and the pressing mechanism is reset to the tape supporting plate 5 in the moving process of the clamping and cutting mechanism 12, so that the whole paper board adhesive tape pasting work is completed, and the completeness and the orderliness of the paper board adhesive tape pasting are promoted.

To effectively facilitate movement of the clamping cutting mechanism 12; as shown in fig. 3, the sliding mechanism includes a first motor 16, a screw rod 17, a slider 18 and a guide groove, two ends of the screw rod 17 are respectively fixed on inner walls of two sides of the mounting hole through bearings, the first motor 16 is fixed on an outer wall of one side of the mounting plate 11 through a bracket, an output shaft of the first motor 16 is connected with one end of the screw rod 17 through a thread, the guide groove is opened on an outer wall of one side of the back of the mounting plate 11, the slider 18 is sleeved on the circumference of the screw rod 17, and the slider 18 and the guide groove form a sliding fit; during the use, through starting first motor 16, first motor 16 drives screw rod 17 rotatory to make slider 18 can slide in screw rod 17 and guide slot, and then guaranteed the centre gripping of its centre gripping cutting mechanism 12 of one side to 3 tip of adhesive tape rolls with cut efficiency.

In order to solve the problems of cutting, clamping and pulling of the adhesive tape; as shown in fig. 4, the clamping and cutting mechanism 12 includes a first clamping plate 21, a second clamping plate 22, a protrusion 23, a gear 24, two rack plates 25, a second motor 26, a cutter 27 and a second air pump 28, wherein the second air pump 28 is fixed on an outer wall of one side of the sliding block 18 by a thread, an end portion of an extension rod of the second air pump 28 is fixed with a mounting seat by a thread, the second motor 26 is fixed on an outer wall of one side of the mounting seat by a bolt, the gear 24 is sleeved on an output end of the second motor 26, outer walls of the mounting seat near two sides of the gear 24 are provided with sliding grooves, the two sliding grooves are connected with guide plates in a sliding manner, outer walls of one sides of the two rack plates 25 are fixed on one sides of the two guide plates by a bolt, the two rack plates 25 are engaged with the gear 24, the first clamping plate 21 and the second clamping plate 22 are welded on outer walls of one sides of the two rack plates, a cutter groove is formed in one side of the top of the second clamping plate 22, the cutter 27 is matched with the cutter groove, and the protrusion 23 is welded to the top of the second clamping plate 22; when the cutting machine is used, the second air cylinder 28 is started to drive the mounting seat to move towards the adhesive tape, the first clamping plate 21 and the second clamping plate 22 are positioned above and below the adhesive tape, the second motor 26 is started to drive the gear 24 to rotate, the guide plates on one sides of the two rack plates 25 are driven to slide in the respective sliding grooves through the mutual meshing relationship between the gear 24 and the two rack plates 25, at the moment, the first clamping plate 21 and the second clamping plate 22 connected with the two rack plates 25 start to move towards opposite directions, when the first clamping plate 21 and the second clamping plate 22 are mutually jointed, the cutter 27 and the cutter grooves are mutually jointed, the cutting work on the adhesive tape is further completed, the effectiveness and the efficiency of the adhesive bonding of the paperboard adhesive tape are improved, and in the cutting process, the adhesive side of the adhesive tape is adhered to the bulge 23 on the second clamping plate 22, so that when the adhesive tape is cut, the paper board adhesive tape can not be loosened and fall off due to the tightening force, thereby ensuring the safety and continuity of the paper board adhesive tape bonding.

In order to improve the adhesion between the adhesive tape and the paperboard; as shown in fig. 2-3, the pressing mechanism includes a limiting roller 13, a sliding groove 14, a first air pump 15, a connecting shaft and a sliding sleeve 20, the sliding groove 14 is formed in an outer wall of one side of the supporting plate 5, the sliding sleeve 20 is slidably connected in the sliding groove 14, the connecting shaft is fixed at the bottom end of the sliding sleeve 20 through a thread, the limiting roller 13 is fixed at the bottom end of the connecting shaft through a rotating shaft, and the first air pump 15 is fixed on an outer wall of one side of the supporting plate 5, which is close to the upper side of; during the use, through starting first air pump 15, driven sliding sleeve 20 and moved down in spout 14, at this moment, spacing gyro wheel 13 extrudees the sticky tape to drive dust-proof box 1 along with the guide rail and remove and carry out the roll extrusion work, from this, improved the adhesion degree between sticky tape and the cardboard, guaranteed the high quality that the sticky tape bonded.

The adhesive tape roll 3 is convenient to assemble, disassemble and replace; as shown in fig. 5, the hinge element 30 is welded on the outer wall of one side of the U-shaped fixing plate 4, the clamping plate 29 is welded on the outer wall of one side of the hinge element 30, and the limiting ring is fixed on the outer wall of one side of the clamping plate 29 through a thread; when the adhesive tape roll is used, the limiting ring of the clamping plate 29 is fixedly connected with the rotating shaft for fixing the adhesive tape roll 3 through the hinge piece 30, so that the adhesive tape roll 3 is convenient to assemble, disassemble and replace.

In the embodiment, when in use, the dust-proof box 1 is fixed on the sliding plate of the guide rail, one end of the adhesive tape roll 3 is respectively wound on the first guide roller 8, the second guide roller 9 and the third guide roller 10, and one end of the adhesive tape roll 3 is fixed by the clamping and cutting mechanism 12, by starting the first motor 16, the first motor 16 drives the screw 17 to rotate, so that the slide block 18 can slide in the screw 17 and the guide groove, so that the clamping and cutting mechanism 12 slides from one end close to the third guide roller 10 to one end of the support plate 5, so that the end of the adhesive tape on the clamping and cutting mechanism is torn out to a large section, at this time, the first air pump 15 is started, the sliding sleeve 20 is driven to move downwards in the sliding groove 14, at this time, the limit roller 13 extrudes the adhesive tape and rolls along with the guide rail driving the dust-proof box 1 to move, and during this time, the sliding plate on the guide rail drives the dust-proof box 1 to move, in the moving process of the dust-proof box 1, the clamping and cutting mechanism 12 is kept in a loose state, when the length of the adhesive tape reaches the length of the paper board, the first motor 16 drives the clamping and cutting mechanism 12 on the slide block 18 to move to one end close to the third guide roller 10, the second cylinder 28 is started to drive the mounting seat to move towards the adhesive tape, the first clamping plate 21 and the second clamping plate 22 are positioned above and below the adhesive tape, the second motor 26 is started to drive the gear 24 to rotate, and the guide plates on one side of the two rack plates 25 are driven to slide in respective sliding grooves through the mutual meshing relationship between the gear 24 and the two rack plates 25, at the moment, the first clamping plate 21 and the second clamping plate 22 connected with the two rack plates 25 start to move towards opposite directions, when the first clamping plate 21 and the second clamping plate 22 are mutually jointed, the cutter 27 and the cutter groove are mutually jointed, so that the cutting work of the adhesive tape is finished, and in the moving process of the clamping and cutting mechanism 12, the pressing mechanism is reset to the tape-returning supporting plate 5, so that the whole work of adhering the paperboard tape is completed.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

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