Mortar scattering device for bridge engineering
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a mortar scattering device for bridge engineering.
Background
Along with the rapid development of the economy in China, the progress of the development of the foundation construction in China is accelerated, the nationwide networked coverage is gradually realized for the construction of roads and bridges, the travel of people is more convenient, a large amount of mortar concrete is needed for the construction of the bridges, the selection of the mortar usually depends on the quality of the whole construction, the mortar can be distinguished to a certain extent according to the composition materials, and the common mortar can be further divided into lime mortar. Is prepared from lime paste, sand and water according to a certain proportion, and is generally used for masonry and plastering layers with low strength requirement and no moisture; and (5) cement mortar. Is prepared from cement, sand and water according to a certain proportion, and is generally used for brickwork, wall surface or ground in a humid environment or water; and (5) mixing mortar. The cement or lime mortar is mixed with proper admixture, such as flyash, diatomite, etc. to save cement or lime and improve the workability of the mortar. The common mixed mortar is cement lime mortar, cement clay mortar, lime clay mortar and the like.
The mortar should have good workability for some fresh-mixed common mortar, and the hardened mortar should have required strength and binding force. The workability of mortar is related to its fluidity and water retention, and is generally known from construction experience or determined through experiments. The adhesion of mortar is enhanced with the increase of the label thereof, and is also related to the surface state of masonry and the like, cleanliness, humidity degree and construction and maintenance conditions. Therefore, the bricks are generally wet before bricking so as to enhance the bonding force between the bricks and mortar and ensure the bricking quality;
Before the mortar is used, the mortar needs to be scattered to a certain extent so as to be better mixed, and the prior art (application number: CN201921327358. X) discloses a mortar storage tank with uniform unloading, and the inventor discovers that the following problems exist while realizing the prior art: 1. the device breaks up mortar only through a horizontal blade and a vibrating rod, which can lead part of mortar to pass through the blade and cannot meet the requirement of large-dose mortar breaking treatment; 2. secondly, the scattering mechanism of the device cannot further process the insufficiently scattered mortar, so that the insufficiently scattered mortar enters a later working flow to influence the quality of other works, and the actual working effect is poor; 3. the device can only make mortar fall into under the device, but can not satisfy the material receiving capacity of different types of vehicles or other storage tools in different working occasions, so that the device is difficult to adapt to various different working environments, and has poor practicability.
Disclosure of Invention
The invention aims to provide a mortar scattering device for bridge engineering, which solves the problems that most of the prior mortar in the prior art is scattered by manually beating by a worker before use, the working efficiency is lower, the labor intensity of the worker is increased, and when a large amount of mortar is used, the mortar is scattered to a certain extent, so that the scattering purpose is difficult to realize by the worker.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a device is broken up with mortar to bridge engineering, includes first mechanism, first motor, third motor and second motor of scattering, first mechanism of scattering includes first storehouse body, the rear end of first storehouse body is fixed with first rotation storehouse, the inside of first storehouse body is provided with two sets of first crushing gyro wheels, and the front and back both ends of first crushing gyro wheel all are connected through the bearing with first storehouse body, the rear end of first crushing gyro wheel all passes the internal wall of first storehouse and extends to inside the first rotation storehouse, the inside of first rotation storehouse is provided with the head rod, and the both ends are all connected through the bearing with first rotation storehouse about the head rod, the right-hand member of head rod passes through the first rotation storehouse inner wall and extends to outside the first rotation storehouse, the rear end of first crushing gyro wheel all is connected through the conical gear and the head rod transmission, the right end of the first rotating bin is provided with a first motor, a driving shaft at the left end of the first motor is fixedly connected with a first connecting rod, a first supporting frame is fixed at the outer side of the first bin body, a first shaking mechanism is arranged in the first bin body and comprises a first moving bin, the right end of the first bin body is fixedly provided with a first moving bin, the right end of the first moving bin is fixedly provided with a second rotating bin, the inside of the second rotating bin is provided with a first rotary table, the front end and the rear end of the first rotary table are connected with the second rotating bin through bearings, the front end of the first rotary table penetrates through the inner wall of the second rotating bin to extend to the outer side of the second rotating bin, the front end of the second rotating bin is provided with a second motor, the driving shaft at the rear end of the second motor is fixedly connected with the first rotary table, the left end of the first rotary table is hinged with a second connecting rod, the inside in first removal storehouse is provided with the third connecting rod, first recess has been seted up to the right-hand member in first removal storehouse, the right-hand member of third connecting rod passes first recess and extends to inside second rotation storehouse and link to each other with the second connecting rod is articulated, the second recess has been seted up to the right-hand member of first storehouse body, the left end of first storehouse body is fixed with the second and removes the storehouse, the third recess has been seted up to the left end of first storehouse body, the middle part of first storehouse body is provided with first screen cloth, and the left end of first screen cloth inserts and establishes inside the second removal storehouse, the right-hand member of second screen cloth inserts and establishes inside the first removal storehouse, the bottom at both ends is evenly fixed with the second in first storehouse body, and the first spring all with second fixed connection, the right-hand member of first storehouse body is provided with the third screen cloth, the right-hand member is provided with first screen cloth, the third rotary shaft is connected to the third rotary shaft through the first rotary shaft of first rotary shaft storehouse, the first rotary shaft is connected to the fourth rotary shaft is all through the third rotary shaft, the third rotary shaft is connected to the inside the fourth rotary shaft, the first rotary shaft is connected to the fourth rotary shaft, the rotary shaft is connected to the inside the fourth rotary shaft through the first rotary shaft, the first rotary shaft is inside the rotary shaft, the rotary shaft is inside, the top of the fourth connecting rod passes through the inner wall of the fourth rotating bin and extends to the outer side of the fourth rotating bin, a third motor is installed at the top of the fourth rotating bin, a driving shaft at the bottom end of the third motor is fixedly connected with the fourth connecting rod, a fourth groove is formed in the inner wall of the third rotating bin, a first heating wire is installed in the fourth groove, the bottom end of the third rotating bin is communicated with a first discharging port, a fifth groove is formed in the left bottom end of the first discharging port, the bottom end of the first discharging port is hinged with a first connecting plate, a sixth groove is formed in the left end of the first connecting plate, a first inserting rod is inserted in the sixth groove, the right end of the first inserting rod is inserted in the fifth groove, a first opening is formed in the top end of the third rotating bin, the left end of the first bin body is communicated with a second discharging port, a first guiding mechanism is arranged at the bottom end of the first bin body, the first guide mechanism comprises a third discharge hole, a third discharge hole is arranged at the bottom end of the first bin body, a first chute is arranged at the bottom end of the first bin body, the top end of the third discharge hole is inserted into the first chute, a seventh groove is arranged at the top end of the third discharge hole, an eighth groove is arranged at the bottom end of the first bin body, two groups of first balls are arranged in the eighth groove, the bottom ends of the first balls are embedded in the seventh groove, a ninth groove is arranged in the upper end and the lower end of the third discharge hole, a fifth connecting rod is inserted in the ninth groove, a first connecting block is fixed at the top end of the third discharge hole, a first screw hole is arranged in the first connecting block, a fourth discharge hole is arranged at the left end of the third discharge hole, a second connecting block is fixed at the top end of the fourth discharge hole, the first screw is inserted in the first screw hole, the left end of the first screw penetrates through the middle of the second connecting block, the right end of the fourth discharging hole is provided with a tenth groove, and the left end of the fifth connecting rod is inserted in the tenth groove.
Preferably, the left end and the right end of the first bin body are both hinged with connecting plates, the bottom ends of the connecting plates are both fixed with springs, and the springs are both fixedly connected with the inner wall of the first bin body.
Preferably, the longitudinal section of the first screen is inclined, and the longitudinal section of the second screen is inclined.
Preferably, the top on first screen cloth right side is fixed with the lug, the bottom on second screen cloth right side is fixed with the lug, the inside in first removal storehouse is seted up and is organized the spout that the lug was to the complex with two sets of lugs.
Preferably, a baffle is fixed at the top end of the third rotary bin, and the baffle is fixed with the front side and the rear side of the second discharge hole.
Preferably, the bottom of the third rotating bin is funnel-shaped, and the bottom of the first bin body is funnel-shaped.
Preferably, the top of the third discharge hole is L-shaped, and the top of the third discharge hole is inserted into the first chute.
Preferably, the outer sides of the left end and the right end of the fifth connecting rod are both fixed with protruding blocks, and the right end of the first screw rod is abutted against the protruding blocks at the right end of the fifth connecting rod.
Preferably, the left end of the first screw rod is glued with a first rubber pad, and the first rubber pad is attached to the surface of the first screw rod.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, some hardened or coagulated massive mortar is crushed to a certain extent, so that the scattered mortar meets the use standard of a user, the whole mortar is scattered again for recycling, the resource utilization rate of the user is greatly saved, the production cost of the user is saved, the scattering effect of the mortar is better, the efficiency is higher, the output direction of the mortar is changed to a certain extent, the mortar receiving by workers is facilitated, the receiving by the user is more convenient, the receiving place of the user is increased, the receiving speed is faster, and the use is more convenient;
1. When the user needs to break up mortar, the user firstly carries out external power supply on the first motor, the third motor and the second motor to enable the first motor and the second motor to work, the first motor is started to drive the first connecting rod to rotate, the first connecting rod is connected with the first breaking roller through the bevel gear in a transmission way to drive the two groups of the first breaking rollers to rotate relatively, the user pours the mortar needing to be broken up into the top end of the first bin body, certain breaking is carried out on some hardened or coagulated massive mortar, certain breaking is carried out on larger mortar particles through the rotation of the two groups of the first breaking rollers, certain breaking is carried out on some wet or incompletely broken mortar is carried out, when the mortar falls onto the surface of the first screen, the second motor drives the first rotating disc to rotate to drive the third connecting rod to move left and right, the second screen is driven to move left and right, the first screen is driven to move left and right, the mortar falling onto the surface of the first screen is screened and scattered again, the scattering degree of the scattered mortar is ensured, the scattered mortar meets the use standard of users, when some wet mortar is extruded and flattened by the first crushing roller, the large-particle mortar enters the third rotating bin through the left and right vibrating screens of the first screen, the first electric heating wire in the third rotating bin is externally connected with a power supply, the wet mortar is heated to a certain extent, the wet mortar is dried, the whole mortar is easily broken and scattered again, the recycling is realized, the resource utilization rate of users is greatly saved, the production cost of users is saved, the function of scattering large-dose mortar can be fully met, the scattering effect of the mortar is better, and the efficiency is higher;
2. be provided with third discharge gate and fourth discharge gate, when the mortar after breaking up falls into the bottom of the first storehouse body, need the user to carry out certain transportation utilization to it through conveyer, when the first storehouse body bottom is piled up there is a conveyer, user's accessible rotates the third discharge gate for the output direction of mortar obtains certain change, make things convenient for the workman to the mortar material that connects, and user's accessible rotates first screw rod, make first screw rod remove to the left side, make the inside slow pulling of fifth connecting rod from ninth recess, can carry out certain extension to the feed opening that fourth discharge gate and third discharge gate are constituteed, make the material that connects of user more convenient, make the user connect the material place increase, can adapt to different operational environment, connect the material speed faster, it is more convenient to use.
Drawings
FIG. 1 is a schematic elevational cross-sectional view of the structure of the present invention;
FIG. 2 is an enlarged schematic view of the structure A of FIG. 1 according to the present invention;
FIG. 3 is an enlarged schematic view of the structure B of FIG. 1 according to the present invention;
FIG. 4 is an enlarged schematic view of the structure of FIG. 1C according to the present invention;
FIG. 5 is an enlarged schematic view of the structure D of FIG. 1 according to the present invention;
FIG. 6 is an enlarged schematic view of the structure of E in FIG. 1 according to the present invention;
FIG. 7 is an enlarged schematic view of the structure F in FIG. 1 according to the present invention;
FIG. 8 is a schematic bottom cross-sectional view of the structure G-G of FIG. 1 in accordance with the present invention;
FIG. 9 is a schematic top view of the H-H structure of FIG. 1 in accordance with the present invention;
fig. 10 is a schematic elevational view of the structure of the present invention.
In the figure: 100. a first dispersion mechanism; 110. a first bin; 111. a first rotating bin; 112. a first crushing roller; 113. a first connecting rod; 114. a first motor; 115. a first support frame; 200. a first dithering mechanism; 210. a first moving bin; 211. a second rotating bin; 212. a first turntable; 213. a second motor; 214. a second connecting rod; 215. a third connecting rod; 216. a first groove; 217. a second groove; 218. a second moving bin; 219. a third groove; 220. a first screen; 221. a second screen; 222. a first spring; 300. a first drying mechanism; 310. a third rotating bin; 311. a fourth rotating bin; 312. a first stirring rod; 313. a fourth connecting rod; 314. a third motor; 315. a fourth groove; 316. a first heating wire; 317. a first discharge port; 318. a fifth groove; 319. a first connection plate; 320. a sixth groove; 321. a first plunger; 322. a first opening; 323. a second discharge port; 400. a first guide mechanism; 410. a third discharge port; 411. a first chute; 412. a seventh groove; 413. an eighth groove; 414. a first ball; 415. a ninth groove; 416. a fifth connecting rod; 417. a first connection block; 418. a first screw hole; 419. a fourth discharge port; 420. a second connection block; 421. a first screw; 422. tenth groove.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-10, an embodiment of the present invention is provided:
The utility model provides a mortar scattering device for bridge engineering, including first mechanism 100 that breaks up, first motor 114, third motor 314 and second motor 213, first mechanism 100 includes first storehouse body 110, the rear end of first storehouse body 110 is fixed with first rotation storehouse 111, the inside of first storehouse body 110 is provided with two sets of first crushing gyro wheels 112, and the front and back both ends of first crushing gyro wheel 112 are all connected with first storehouse body 110 through the bearing, the rear end of first crushing gyro wheel 112 all passes first storehouse body 110 inner wall and extends to the inside of first rotation storehouse 111, the inside of first rotation storehouse 111 is provided with head rod 113, and the left and right sides both ends of head rod 113 all are connected with first rotation storehouse 111 through the bearing, the right-hand member of head rod 113 passes through the inner wall that passes first rotation storehouse 111 and extends to the outside of first rotation storehouse 111, the rear end of first crushing gyro wheel 112 all is connected with head rod 113 transmission through the conical gear, the right end of the first rotating bin 111 is provided with a first motor 114, a driving shaft at the left end of the first motor 114 is fixedly connected with a first connecting rod 113, a first supporting frame 115 is fixed at the outer side of the first bin body 110, a first shaking mechanism 200 is arranged in the first bin body 110, the first shaking mechanism 200 comprises a first moving bin 210, the right end of the first bin body 110 is fixedly provided with a first moving bin 210, the right end of the first moving bin 210 is fixedly provided with a second rotating bin 211, the inside of the second rotating bin 211 is provided with a first rotary disc 212, the front end and the rear end of the first rotary disc 212 are connected with the second rotating bin 211 through bearings, the front end of the first rotary disc 212 penetrates through the inner wall of the second rotating bin 211 to extend to the outer side of the second rotating bin 211, the front end of the second rotating bin 211 is provided with a second motor 213, the driving shaft at the rear end of the second motor 213 is fixedly connected with the first rotary disc 212, the left end of the first rotating disc 212 is hinged with a second connecting rod 214, the inside of the first moving bin 210 is provided with a third connecting rod 215, the right end of the first moving bin 210 is provided with a first groove 216, the right end of the third connecting rod 215 passes through the first groove 216 to extend into the second rotating bin 211 to be hinged with the second connecting rod 214, the right end of the first bin body 110 is provided with a second groove 217, the left end of the first bin body 110 is fixed with a second moving bin 218, the left end of the first bin body 110 is provided with a third groove 219, the middle part of the first bin body 110 is provided with a first screen 220, the left end of the first screen 220 is inserted into the second moving bin 218, the right end of the first screen 220 is inserted into the first moving bin 210, the inside of the first bin body 110 is provided with a second screen 221, the left end of the second screen 221 is inserted into the second moving bin 218, the right end of the second screen 221 is inserted into the first moving bin 210, the bottom ends of the left end and the right end of the first screen 220 are uniformly fixed with first springs 222, the first springs 222 are fixedly connected with the second screen 221, the right end of the second screen 221 is fixedly connected with a third connecting rod 215, the left end of the first bin body 110 is provided with a first drying mechanism 300, the first drying mechanism 300 comprises a third rotating bin 310, the left end of the first bin body 110 is fixedly provided with a third rotating bin 310, the left end of the third rotating bin 310 is fixedly provided with a fourth rotating bin 311, two groups of first stirring rods 312 are arranged in the third rotating bin 310, the left end and the right end of the first stirring rods 312 are connected with the third rotating bin 310 through bearings, the left end of the first stirring rods 312 penetrates through the inner wall of the third rotating bin 310 to extend into the fourth rotating bin 311, the fourth rotating bin 311 is internally provided with a fourth connecting rod 313, the upper end and the lower end of the fourth connecting rod 313 are connected with the fourth rotating bin 311 through bearings, the left end of the first stirring rod 312 is connected with a fourth connecting rod 313 through a bevel gear in a transmission way, the top end of the fourth connecting rod 313 passes through the inner wall of the fourth rotating bin 311 to extend to the outer side of the fourth rotating bin 311, a third motor 314 is installed at the top end of the fourth rotating bin 311, a driving shaft at the bottom end of the third motor 314 is fixedly connected with the fourth connecting rod 313, a fourth groove 315 is formed in the inner wall of the third rotating bin 310, a first heating wire 316 is installed in the fourth groove 315, the bottom end of the third rotating bin 310 is communicated with a first discharging hole 317, a fifth groove 318 is formed in the bottom end at the left side of the first discharging hole 317, a first connecting plate 319 is hinged at the bottom end of the first discharging hole 317, a sixth groove 320 is formed in the left end of the first connecting plate 319, a first inserting rod 321 is inserted in the sixth groove 320, and the right end of the first inserting rod 321 is inserted in the fifth groove 318, the top end of the third rotary bin 310 is provided with a first opening 322, the left end of the first bin body 110 is communicated with a second discharging hole 323, the bottom end of the first bin body 110 is provided with a first guiding mechanism 400, the first guiding mechanism 400 comprises a third discharging hole 410, the bottom end of the first bin body 110 is provided with a first sliding chute 411, the top end of the third discharging hole 410 is inserted into the first sliding chute 411, the top end of the third discharging hole 410 is provided with a seventh groove 412, the bottom end of the first bin body 110 is provided with an eighth groove 413, the inside of the eighth groove 413 is provided with two groups of first balls 414, the bottom ends of the first balls 414 are embedded into the seventh groove 412, the inside of the upper end and the lower end of the third discharging hole 410 is provided with a ninth groove 415, the inside of the ninth groove 415 is inserted with a fifth connecting rod 416, the top end of the third discharging hole 410 is fixed with a first connecting block 417, the first connecting block 417 is internally provided with a first screw hole 418, the left end of the third discharging hole 410 is provided with a fourth discharging hole 419, the top end of the fourth discharging hole 419 is fixedly provided with a second connecting block 420, the first screw 421 is inserted into the first screw hole 418, the left end of the first screw 421 penetrates through the middle part of the second connecting block 420, the right end of the fourth discharging hole 419 is provided with a tenth groove 422, and the left ends of the fifth connecting rods 416 are all inserted into the tenth groove 422;
further, the two ends of the first bin 110 are hinged with connecting plates, the bottom ends of the connecting plates are fixed with springs, and the springs are fixedly connected with the inner wall of the first bin 110, so that the mortar scattered by the first crushing roller 112 can be guided to a certain extent, and the mortar falls to the middle of the first screen 220 as much as possible;
Further, the longitudinal section of the first screen 220 is inclined, and the longitudinal section of the second screen 221 is inclined, so that the large-particle mortar falling onto the surface of the first screen 220 better slides to the left end of the first bin 110, and is discharged more quickly;
Further, the top of the right side of the first screen 220 is fixed with a bump, the bottom of the right side of the second screen 221 is fixed with a bump, and a chute matching with the two groups of bumps is provided in the first moving bin 210, so that the movement of the first screen 220 and the second screen 221 is more stable;
further, the top end of the third rotating bin 310 is fixed with a baffle, and the baffle is fixed with the front side and the rear side of the second discharge hole 323, so that mortar rolling from the second discharge hole 323 more accurately enters the first opening 322 and falls into the third rotating bin 310, and the mortar is prevented from scattering to other places;
further, the bottom end of the third rotating bin 310 is funnel-shaped, and the bottom end of the first bin body 110 is funnel-shaped, so that the dropping speed of mortar is faster, and the blanking is performed faster;
Further, the top end of the third discharge port 410 is L-shaped, and the top end of the third discharge port 410 is inserted into the first chute 411, so that the third discharge port 410 is better stably connected with the first chute 411, and the third discharge port 410 is more stable when rotating;
Further, the outer sides of the left and right ends of the fifth connecting rod 416 are fixed with protrusions, and the right end of the first screw 421 is abutted against the protrusions at the right end of the fifth connecting rod 416, so that the first screw 421 can control the fifth connecting rod 416 to a certain extent to control the extension length of the fifth connecting rod 416;
Further, the left end of the first screw 421 is glued with a first rubber pad, and the first rubber pad is attached to the surface of the first screw 421, so that the friction between the hand of the user and the surface of the first screw 421 is increased, and the user can exert more convenient force during rotation.
Working principle: firstly, when a user needs to break up mortar to a certain extent, the user connects the first motor 114, the second motor 213, the third motor 314 and the first heating wire 316 externally, the user starts the first motor 114 to drive the first connecting rod 113 to rotate, the first connecting rod 113 is in transmission connection with the rear end of the first breaking roller 112 through a bevel gear, so that the first connecting rod 113 rotates to drive two groups of the first breaking rollers 112 to rotate relatively, mortar to be broken is added to the top end of the first bin body 110, relatively large agglomerates in the mortar are broken into small particles through the relative rotation of the two groups of the first breaking rollers 112, and the moist mortar possibly falls into a certain flat shape due to the extrusion of the first breaking rollers 112, and the broken mortar falls into the middle part of the first bin body 110 and falls into the surface of the first screen 220, so that certain impact force is generated on the first screen 220 in the process of falling of the mortar, and the broken mortar is broken again;
The first turntable 212 is driven to rotate by the second motor 213, the first turntable 212 drives the second connecting rod 214 to move left and right, the second connecting rod 214 drives the third connecting rod 215 to move left and right, the third connecting rod 215 drives the second screen 221 to move left and right, the second screen 221 drives the first screen 220 to move left and right by the first spring 222, mortar falling onto the surface of the first screen 220 generates certain impact force on the first screen 220, the first screen 220 generates certain extrusion on the first spring 222, the shaking of the first screen 220 is more frequent, the left and right movement of the first screen 220 is driven by the left and right movement of the second screen 221, the shaking effect of the first screen 220 and the second screen 221 on mortar is better, certain screening is performed on some incompletely broken or moist mortar, and the mortar with larger particles is discharged through the second discharge hole 323 and falls into the third rotating bin 310;
Then, the fourth connecting rod 313 is driven to rotate by the third motor 314, the fourth connecting rod 313 is in transmission connection with the first stirring rod 312 through a bevel gear, the first stirring rod 312 is driven to rotate, the scattered mortar entering the third rotating bin 310 is scattered again, the moist mortar is heated by the first heating wire 316 and is dried, the moist mortar is scattered by the first stirring rod 312, so that the scattering efficiency of the device is higher, a user pulls out the first inserting rod 321, rotates the first connecting plate 319, the mortar in the third rotating bin 310 is taken out for use, the waste of the mortar is avoided, and the resources of the user are saved;
When the mortar is scattered and falls into the bottom end of the first bin body 110, a user can rotate the third discharge port 410 to adjust the discharging direction of the mortar to a certain extent, so that the user can more flexibly receive the mortar, the user can move the first screw 421 to the left end by rotating the first screw 421, the right end of the first screw 421 is mutually abutted with the fifth connecting rod 416, the fifth connecting rod 416 can move to the left while the first screw 421 moves to the left, the discharging pipeline formed by the third discharge port 410 and the fourth discharge port 419 can be stretched to a certain extent, the discharging pipeline formed by the third discharge port 410 and the fourth discharge port 419 can be controlled to a certain extent by rotating the first screw 421, the user can use the mortar more conveniently, the receiving is more flexible, and the efficiency is higher.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.