阅读说明：本技术 一种镀锌钢板自动化拉伸矫直处理机械 (Automatic stretching and straightening treatment machine for galvanized steel sheet ) 是由 王海平 于 2021-07-16 设计创作，主要内容包括：本发明涉及一种镀锌钢板自动化拉伸矫直处理机械,包括支撑架、固定组件和矫正组件,所述支撑架上安装有固定组件,固定组件上方设置有矫正组件,矫正组件安装在支撑架上,本发明可以解决焊接钢板在进行拉伸矫正处理时存在的问题：a:现有的焊接板材在进行拉伸修复时,常会出现修复不完全的情况发生,后续需要进行二次修复,增加了员工们的工作量；b：现有的焊接板材在进行拉伸修复之后,因自生弹力作用常会出现回弹情况,在后续镀锌处理时影响镀锌效果。(The invention relates to an automatic stretching and straightening treatment machine for galvanized steel sheets, which comprises a support frame, a fixing assembly and a straightening assembly, wherein the support frame is provided with the fixing assembly, the straightening assembly is arranged above the fixing assembly, and the straightening assembly is arranged on the support frame. a, when the existing welding plate is subjected to stretching repair, incomplete repair often occurs, secondary repair is required subsequently, and the workload of staff is increased; b: after the existing welded plate is stretched and repaired, the springback condition often occurs due to the self-generated elastic force, and the galvanizing effect is influenced during the subsequent galvanizing treatment.)

1. The utility model provides an automatic tensile straightening processing machine of galvanized steel sheet, includes support frame (1), fixed subassembly (2) and correction subassembly (3), its characterized in that: install fixed subassembly (2) on support frame (1), fixed subassembly (2) top is provided with correction subassembly (3), and correction subassembly (3) are installed on support frame (1), wherein:

the fixing component (2) comprises a charging box (21), a hand-operated rotating rod (22), an extrusion disc (23), a rear supporting plate (24), a front supporting plate (25), a detection plate (26) and a pressure maintaining block (27), the charging box (21) is fixedly installed on the supporting frame (1) through bolts, the front end face and the rear end face of the charging box (21) are provided with abdicating grooves A, the left end and the right end of the charging box (21) are symmetrically provided with hand-operated rotating rods (22) in a rotating connection mode, the hand-operated rotating rods (22) are provided with extrusion discs (23), the extrusion discs (23) are located on the inner side of the charging box (21), the rear end of the charging box (21) is provided with a rear supporting plate (24), the front end of the charging box (21) is provided with a front supporting plate (25), a detection plate (26) which is matched with the abdicating grooves A for use is installed above the rear supporting plate (24) in a sliding connection mode, and the front supporting plate (25) is provided with a pressure retaining block (27) which is matched with the abdicating grooves A for use in a sliding connection mode;

the correcting component (3) comprises a supporting rod (31), an upper cover plate (32), a downward cylinder (33) and a correcting plate (34), the supporting rod (31) is uniformly installed on the supporting frame (1) in a welding mode, the upper cover plate (32) is fixedly installed on the supporting rod (31), the downward cylinder (33) is installed on the upper cover plate (32), the correcting plate (34) is installed on an output shaft of the downward cylinder (33), and the correcting plate (34) is located right above the charging box (21).

2. The automatic stretching-straightening machine for galvanized steel sheets according to claim 1, wherein: offer the groove of stepping down B on charging box (21), the groove of stepping down B is gone up and is installed roll-in runner (211) through the mode of rotating the connection, charging box (21) inner wall is gone up and is installed holding down plate (212) through sliding connection's mode symmetry, is connected through push down spring (213) between holding down plate (212) and charging box (21), installs rotation wheel (214) through the mode of rotating the connection on holding down plate (212) lower terminal surface.

3. The automatic stretching-straightening machine for galvanized steel sheets according to claim 1, wherein: the extrusion disc (23) is provided with an arc-shaped convex block (231), and rolling beads (232) are uniformly arranged on the arc-shaped convex block (231) in a rolling connection mode.

4. The automatic stretching-straightening machine for galvanized steel sheets according to claim 1, wherein: the front supporting plate (25) and the rear supporting plate (24) are consistent in structure, the cross sections of the front supporting plate and the rear supporting plate are U-shaped structures, and inner guide columns (251) are uniformly arranged on the side wall of the front supporting plate (25) from outside to inside in a rotating connection mode.

5. The automatic stretching-straightening machine for galvanized steel sheets according to claim 1, wherein: the detection device is characterized in that sliding grooves C are symmetrically formed in the upper end surface of the detection plate (26), contact thimbles (261) are uniformly mounted on the detection plate (26) in a sliding connection mode, contact balls (262) are mounted above the contact thimbles (261) in a rotating connection mode, and a detection sliding plate (263) is mounted at the upper end of the detection plate (26) in a sliding connection mode.

6. The automatic stretching-straightening machine for galvanized steel sheets according to claim 5, wherein: the detection sliding plate (263) is of an N-shaped structure, a contact pressing block (2631) is uniformly installed on the detection sliding plate (263) in a sliding connection mode, and the contact pressing block (2631) is connected with the detection sliding plate (263) through a return spring (2632).

7. The automatic stretching-straightening machine for galvanized steel sheets according to claim 1, wherein: the pressure maintaining block (27) is connected with a feeding rod (271) through threads, a rotating disc (272) is installed at the upper end of the feeding rod (271), a pushing and extruding pressure block (273) abuts against the lower end face of the feeding rod (271), the pushing and extruding pressure block (273) is installed on the pressure maintaining block (27) in a sliding connection mode, and an outward pushing spring (274) is uniformly arranged between the pushing and detecting plate (26) and the pressure maintaining block (27).

8. The automatic stretching-straightening machine for galvanized steel sheets according to claim 1, wherein: the correcting plate (34) is symmetrically provided with driving columns (341) in a rotating connection mode, a transmission belt (342) is sleeved on the outer side of each driving column (341), the driving column (341) at the left end is connected with an output shaft of a driving motor (343), the driving motor (343) is installed on the side wall of the correcting plate (34), a driving half-tooth sleeve (344) is installed on each driving column (341), a leveling block (345) is arranged on the outer side of each driving half-tooth sleeve (344), and each leveling block (345) is installed on the correcting plate (34) in a sliding connection mode and is connected with the correcting plate (34) through a return spring (346).

Technical Field

The invention relates to the technical field of galvanized steel sheet straightening production, in particular to an automatic stretching and straightening treatment machine for a galvanized steel sheet.

Background

Galvanized steel sheets are welded steel sheets having a hot-dip plated or electro-galvanized layer on the surface, and are widely used in buildings, home appliances, vehicles and ships, container manufacturing industry, electromechanical industry, and the like, and galvanized steel sheets have excellent corrosion resistance, painting property, decorativeness, and good formability, and in recent years, the amount of galvanized steel sheets used in automobiles tends to increase and become the main body of automobile sheets, and are widely used in industrial manufacturing.

The prior welding steel plate has the following problems in the stretching and correcting treatment: a, when the existing welding plate is subjected to stretching repair, incomplete repair often occurs, secondary repair is required subsequently, and the workload of staff is increased; b: after the existing welded plate is stretched and repaired, the springback condition often occurs due to the self-generated elastic force, and the galvanizing effect is influenced during the subsequent galvanizing treatment.

Disclosure of Invention

The invention aims to provide an automatic drawing and straightening treatment machine for galvanized steel sheets, which solves the problems in the background technology.

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

the utility model provides an automatic tensile straightening processing machine of galvanized steel sheet, includes support frame, fixed subassembly and correction subassembly, install fixed subassembly on the support frame, fixed subassembly top is provided with correction subassembly, and correction subassembly installs on the support frame, wherein:

the fixing assembly comprises a charging box, a hand-operated rotating rod, an extrusion disc, a rear supporting plate, a front supporting plate, an inspection plate and a pressure-maintaining block, the charging box is fixedly installed on a supporting frame through bolts, abdicating grooves A are formed in the front end surface and the rear end surface of the charging box, the hand-operated rotating rod is symmetrically installed at the left end and the right end of the charging box in a rotating connection mode, the extrusion disc is installed on the hand-operated rotating rod and is positioned on the inner side of the charging box, the rear supporting plate is installed at the rear end of the charging box, the front supporting plate is installed at the front end of the charging box, the inspection plate which is matched with the abdicating grooves A in use is installed above the rear supporting plate in a sliding connection mode, the pressure-maintaining block which is matched with the abdicating grooves A in use is installed on the front supporting plate in a sliding connection mode, during work, a plate needing stretching and straightening is manually placed into the charging box, then the hand-operated rotating rod is screwed to drive the extrusion disc to press the two ends of the plate, later under the work of correcting the subassembly, correct the restoration to panel, correct the subassembly after the restoration is accomplished and keep away from panel, later artifical promotion pick-up plate pushes down the panel upper end, detects panel, detects up after up to standard, and the manual work is pulled out the pick-up plate, pushes the pressurize piece, and the pressurize piece is worked and is carried out the pressurize to panel and handle to accomplish the fixed back restoration operation of panel.

The correcting component comprises a supporting rod, an upper cover plate, a downward cylinder and a correcting plate, the supporting rod is uniformly installed on the supporting frame in a welding mode, the upper cover plate is fixedly installed on the supporting rod, the downward cylinder is installed on the upper cover plate, the correcting plate is installed on an output shaft of the downward cylinder and is located right above the charging box, during work, after the plate is placed, the downward cylinder works to drive the correcting plate to move downward to be attached to the surface of the plate, and then under the action of the correcting plate, the correcting treatment of the plate is completed.

As a preferred technical scheme, the charging box is provided with a abdicating groove B, rolling rotating wheels are mounted on the abdicating groove B in a rotating connection mode, lower pressing plates are symmetrically mounted on the inner wall of the charging box in a sliding connection mode, the lower pressing plates are connected with the charging box through lower pushing springs, and rotating wheels are mounted on the lower end face of each lower pressing plate in a rotating connection mode.

As a preferred technical scheme of the invention, the extrusion disc is provided with arc-shaped convex blocks, and rolling beads are uniformly arranged on the arc-shaped convex blocks in a rolling connection mode.

As a preferred technical scheme of the invention, the front supporting plate and the rear supporting plate have the same structure, the cross sections of the front supporting plate and the rear supporting plate are both U-shaped structures, and the side wall of the front supporting plate is uniformly provided with inner guide posts from outside to inside in a rotating connection mode.

As a preferable technical scheme of the invention, the upper end surface of the detection plate is provided with a sliding chute C, contact thimbles are uniformly arranged on the detection plate in a sliding connection mode, contact balls are arranged above the contact thimbles in a rotating connection mode, and the upper end of the detection plate is provided with a detection sliding plate in a sliding connection mode.

As a preferable technical scheme of the invention, the detection sliding plate is of an N-shaped structure, contact pressing blocks are uniformly arranged on the detection sliding plate in a sliding connection mode, and the contact pressing blocks are connected with the detection sliding plate through return springs.

As a preferred technical scheme of the invention, the pressure maintaining block is connected with a feed rod through threads, the upper end of the feed rod is provided with a rotating disc, the lower end surface of the feed rod is abutted against a pushing pressure block, the pushing pressure block is arranged on the pressure maintaining block in a sliding connection mode, and outward pushing springs are uniformly arranged between the pushing detection plate and the pressure maintaining block.

As a preferable technical scheme of the invention, the correcting plate is symmetrically provided with driving columns in a rotating connection mode, the outer sides of the driving columns are sleeved with transmission belts, the driving column at the left end is connected with an output shaft of a driving motor, the driving motor is arranged on the side wall of the correcting plate, the driving column is provided with a driving half-gear sleeve, the outer side of the driving half-gear sleeve is provided with a leveling block, and the leveling block is arranged on the correcting plate in a sliding connection mode and is connected with the correcting plate through a return spring.

Compared with the prior art, the invention has the following advantages:

1. the invention can solve the following problems of the prior welding steel plate during stretching and correcting treatment: a, when the existing welding plate is subjected to stretching repair, incomplete repair often occurs, secondary repair is required subsequently, and the workload of staff is increased; b: after the existing welded plate is stretched and repaired, the springback condition often occurs due to the self-generated elastic force, and the galvanizing effect is influenced during the subsequent galvanizing treatment.

2. According to the detection device, the detection plate is designed, after the plate correction treatment is completed, the detection plate is manually pushed into the material loading box, then the contact thimble is contacted with the surface of the plate, the flatness of the surface of the plate is detected, then the detection slide plate is manually pushed to slide along the chute C, secondary extrusion on a lower end bulge is realized through the motion of the slide detection slide plate and the transmission effect of the contact thimble, when the contact thimble cannot be pressed down by the detection slide block, the raised contact thimble has a marking effect on the contact thimble, the timely detection on the plate is realized, the correction component works after the detection, and the surface of the plate is trimmed, so that the condition of incomplete plate repair is further avoided, and the workload of staff is reduced.

3. According to the invention, the pressure maintaining block is designed, after the plate correction operation is completed, the pressure maintaining block is manually pushed into the material loading box, then the rotating disc is manually screwed to drive the feeding rod to move downwards, so that the pushing and extruding pressure block presses the plate at the lower end, the pressure maintaining effect is achieved, the spring action is pushed outwards while pressing, a downward pushing force is given to the pressure maintaining block, the pressure maintaining effect of the pushing and extruding pressure block on the plate is increased, the plate springback condition is further avoided, and the galvanizing effect of the subsequent plate is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a schematic cross-sectional view taken in the direction A-A of FIG. 2 of the present invention;

FIG. 4 is a schematic cross-sectional view of the charging box of the present invention;

FIG. 5 is a schematic cross-sectional view of a sensing plate of the present invention;

FIG. 6 is a schematic view of the structure of the inspection slide of the present invention;

FIG. 7 is a schematic cross-sectional view of a pressure retention block of the present invention;

FIG. 8 is a schematic cross-sectional view of a correction plate of the present invention;

fig. 9 is a schematic cross-sectional view in the direction B-B of fig. 8 in accordance with the present invention.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further explained with reference to fig. 1 to 9.

The utility model provides an automatic tensile straightening processing machine of galvanized steel sheet, includes support frame 1, fixed subassembly 2 and correction subassembly 3, install fixed subassembly 2 on the support frame 1, 2 tops of fixed subassembly are provided with correction subassembly 3, and correction subassembly 3 installs on support frame 1, wherein:

the fixing component 2 comprises a charging box 21, a hand-operated rotating rod 22, a squeezing tray 23, a rear supporting plate 24, a front supporting plate 25, a detecting plate 26 and a pressure maintaining block 27, the charging box 21 is fixedly installed on the support frame 1 through bolts, the front end surface and the rear end surface of the charging box 21 are provided with abdicating grooves A, the left end and the right end of the charging box 21 are symmetrically provided with the hand-operated rotating rod 22 through a rotating connection mode, the squeezing tray 23 is installed on the hand-operated rotating rod 22, the squeezing tray 23 is positioned at the inner side of the charging box 21, the rear supporting plate 24 is installed at the rear end of the charging box 21, the front supporting plate 25 is installed at the front end of the charging box 21, the detecting plate 26 matched with the abdicating grooves A for use is installed above the rear supporting plate 24 through a sliding connection mode, the pressure maintaining block 27 matched with the abdicating grooves A for use is installed on the front supporting plate 25 through a sliding connection mode, during specific work, a plate needing to be stretched and straightened is manually placed into the charging box 21, later twist and move hand bull stick 22, drive extrusion disc 23 and push down panel both ends, later under correction component 3's work, correct the restoration to panel, it keeps away from panel to restore back correction component 3, later artifical promotion pick-up plate 26 pushes down the panel upper end, detects panel, detect up to standard back, the manual work is pulled out pick-up plate 26, will keep silent 27 push into, the pressurize is handled to panel to the work of pressurize piece 27 to accomplish the fixed back repair work of panel.

The charging box 21 is provided with a abdicating groove B, the abdicating groove B is provided with a rolling rotating wheel 211 in a rotating connection mode, the inner wall of the charging box 21 is symmetrically provided with lower pressing plates 212 in a sliding connection mode, the lower pressing plates 212 are connected with the charging box 21 through a lower pushing spring 213, the lower end surface of the lower pressing plates 212 is provided with a rotating wheel 214 in a rotating connection mode, when the charging box works, a plate is pushed into the charging box 21 through the abdicating groove B manually, the surface of the plate is rolled and repaired under the action of the rolling rotating 211, then when the plate enters the charging box 21, the lower pushing spring 213 acts to drive the lower pressing plate 212 to press the plate downwards, after the plate correction operation is completed, the next plate is pushed manually, the plate moves towards the right end through extrusion, and the rotating wheel 214 can reduce the friction resistance between the plate and the lower pressing plate 212 in the movement process, meanwhile, the rolling runner 211 rolls the plate again, thereby further ensuring the flatness of the plate.

Install arc lug 231 on the extrusion dish 23, evenly install roll pearl 232 through the mode of roll connection on the arc lug 231, concrete during operation, artifical hand rocking rod 22 that rotates drives the extrusion dish 23 and rotates to make arc lug 231 support and lean on the panel surface, push down panel, later when panel extends because of correction component 3 effect, the supplementary panel of roll pearl 232 on the arc lug 231 moves, the condition that blocks when having avoided panel to extend takes place.

The structure of preceding layer board 25 and back layer board 24 is unanimous, and the cross-section is the U-shaped structure, evenly is provided with inner guide pillar 251 through the mode of rotating the connection on the preceding layer board 25 lateral wall from outside to inside, and during concrete work, when pick-up plate 26 and pressurize piece 27 move along preceding layer board 25 and back layer board 24, the inner guide pillar 251 effect on preceding layer board 25 and the back layer board 24 can reduce the frictional resistance when preceding layer board 25 and the motion of back layer board 24 to work efficiency when artifical the restoration has been improved.

The upper end surface of the detection plate 26 is provided with a sliding groove C, contact thimbles 261 are uniformly arranged on the detection plate 26 in a sliding connection mode, contact balls 262 are arranged above the contact thimbles 261 in a rotating connection mode, and a detection sliding plate 263 is arranged at the upper end of the detection plate 26 in a sliding connection mode.

The detection slide plate 263 is of an N-shaped structure, the detection slide plate 263 is uniformly provided with a contact pressing block 2631 in a sliding connection mode, the contact pressing block 2631 is connected with the detection slide plate 263 through a return spring 2632, during specific work, the detection plate 26 is manually pushed into the charging box 21, then the contact thimble 261 is contacted with the surface of the plate, the flatness of the surface of the plate is detected, then the detection slide plate 263 is manually pushed to slide along the chute C, secondary extrusion on a lower end bulge is realized through the motion of the slide detection slide plate 263 and the transmission action of the contact thimble 261, then when the detection slide plate 263 cannot press down the contact thimble 261, the contact thimble extrudes the contact pressing block 2631 through the extrusion action, the return spring 2632 contracts, the contact pressing block 2631 moves upwards, the contact thimble 261 is in a jacking state, and the position is marked, so that the purpose of detecting the flatness of the surface of the plate is achieved, then, the detection sliding plate 263 is manually drawn out, the correction assembly 3 works, and the plate is continuously rolled, so that the surface flatness of the plate is further improved.

The pressure maintaining block 27 is connected with a feeding rod 271 through threads, a rotating disc 272 is installed at the upper end of the feeding rod 271, a pushing and extruding pressure block 273 abuts against the lower end face of the feeding rod 271, the pushing and extruding pressure block 273 is installed on the pressure maintaining block 27 in a sliding connection mode, an outward pushing spring 274 is uniformly arranged between the pushing and extruding plate 26 and the pressure maintaining block 27, during specific work, after plate correction operation is completed, the pressure maintaining block 27 is manually pushed into a charging box 21, then the rotating disc 272 is manually screwed, the feeding rod 271 is driven to move downwards, so that the pushing and extruding pressure block 273 presses a plate at the lower end, the pressure maintaining effect is achieved, the outward pushing spring 274 acts when the plate is pressed, downward pushing force is given to the pressure maintaining block 27, the pressure maintaining effect of the pushing and extruding pressure maintaining block 273 on the plate is increased, and the quality of the plate after pressure maintaining is further improved.

The correcting component 3 comprises a supporting rod 31, an upper cover plate 32, a descending cylinder 33 and a correcting plate 34, the supporting rod 31 is uniformly installed on the supporting frame 1 in a welding mode, the upper cover plate 32 is fixedly installed on the supporting rod 31, the descending cylinder 33 is installed on the upper cover plate 32, the correcting plate 34 is installed on an output shaft of the descending cylinder 33, the correcting plate 34 is located right above the charging box 21, and during specific work, after the plate placing operation is completed, the descending cylinder 33 works to drive the correcting plate 34 to move downwards to be attached to the surface of the plate, and then under the action of the correcting plate 34, the correcting treatment on the plate is completed.

The correcting plate 34 is symmetrically provided with driving columns 341 in a rotating connection mode, a transmission belt 342 is sleeved outside the driving columns 341, the driving column 341 at the left end is connected with an output shaft of the driving motor 343, the driving motor 343 is installed on the side wall of the correcting plate 34, a driving half-tooth sleeve 344 is installed on the driving column 341, a leveling block 345 is arranged outside the driving half-tooth sleeve 344, the leveling block 345 is installed on the correcting plate 34 in a sliding connection mode and is connected with the correcting plate 34 through a return spring 346, during specific work, the descending cylinder 33 pushes the correcting plate 34 to move downwards to drive the leveling block 345 to abut against the surface of a plate, then the driving motor works to drive the driving columns 341 to rotate and drive the driving columns 341 at two ends to rotate simultaneously under the action of the transmission belt 342, and during the rotation of the driving columns 341, the driving half-tooth sleeve 344 on the driving column 41 drives the leveling block 345 to move along the surface of the plate, the surface of the plate is pushed and pressed, so that the aim of correcting the surface of the plate is fulfilled.

When in work:

s1, manually pushing the plate into the charging box 21 through the abdicating groove B, rolling and repairing the surface of the plate under the action of rolling rotation 211 while the plate enters, then driving the lower pressing plate 212 to press the plate downwards under the action of the lower pushing spring 213 when the plate enters the charging box 21, and then screwing the hand-operated rotating rod 22 to drive the extrusion disc 23 to press the two ends of the plate, thereby completing the plate fixing operation;

s2, after the plate fixing operation is completed, the descending cylinder 33 pushes the correction plate 34 to move downwards to drive the leveling block 345 to abut against the surface of the plate, then the driving motor works to drive the driving columns 341 to rotate, and meanwhile, the driving columns 341 at two ends are driven to rotate simultaneously by matching with the action of the transmission belt 342, and in the rotating process of the driving columns 341, the driving half-tooth sleeves 344 on the driving columns 41 drive the leveling block 345 to move along the surface of the plate to push and press the surface of the plate, so that the aim of correcting the surface of the plate is fulfilled;

s3, after finishing the surface correction operation of the plate, manually pushing the detection plate 26 into the charging box 21, then contacting the thimble 261 with the surface of the plate, detecting the flatness of the surface of the plate, then manually pushing the detection slide plate 263 to slide along the chute C, realizing secondary extrusion on a lower end bulge by matching the motion of the slide detection slide plate 263 with the transmission action of the contact thimble 261, then contacting the thimble to extrude the contact pressing block 2631 by the extrusion action when the detection slide plate 263 cannot press down the contact thimble 261, enabling the return spring 2632 to contract, enabling the contact pressing block 2631 to move upwards, placing the part, and marking the part, thereby realizing the surface detection operation of the plate;

s4, after the surface detection operation of the plate is completed, manually pushing the pressure maintaining block 27 into the charging box 21, manually twisting the rotating disc 272 to drive the feeding rod 271 to move downwards, so that the pushing pressing block 273 presses the plate at the lower end, the pressure maintaining effect is achieved, the pushing spring 274 acts while pressing, a downward pushing force is given to the pressure maintaining block 27, the pressure maintaining effect of the pushing pressing block 273 on the plate is increased, and the pressure maintaining operation after the plate is repaired is completed;

s5, after the pressure maintaining operation of the plate is completed, a next plate is pushed manually, the plate moves towards the right end through extrusion, the rotating wheel 214 can reduce the friction resistance between the plate and the lower pressing plate 212 in the moving process, and meanwhile, the rolling rotating wheel 211 rolls the plate again, so that the plate taking operation is completed.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.