阅读说明：本技术 一种建筑施工用外墙涂刷装置 (Exterior wall painting device for building construction ) 是由 胡增永 于 2020-12-24 设计创作，主要内容包括：本发明公开了一种建筑施工用外墙涂刷装置,包括注料口、顶板、伺服电机和储料箱,所述顶板顶端的中间位置处安装有伺服电机,所述伺服电机底端的两侧均固定连接有支架,所述固定片的一侧均固定连接有传动轴,所述传动轴的一侧固定连接有车轮,所述储料箱底端的两侧均固定连接有调节结构,所述调节结构的一侧安装有拆卸结构。本发明通过设置有车轮,由于车轮上安装吸盘,吸盘可以增加与智能建筑外墙的摩擦力,在增加摩擦力的同时,由于车轮的旋转可以带动皮带旋转,旋转的皮带带动旋转杆进行旋转,从而实现了旋转杆上的主齿轮和从齿轮相互配合达到对扇叶旋转的效果,同时达到在对涂抹的原料进行风干的作用。(The invention discloses an outer wall painting device for building construction, which comprises a filling port, a top plate, a servo motor and a material storage box, wherein the servo motor is arranged in the middle position of the top end of the top plate, supports are fixedly connected to two sides of the bottom end of the servo motor, a transmission shaft is fixedly connected to one side of a fixing piece, a wheel is fixedly connected to one side of the transmission shaft, adjusting structures are fixedly connected to two sides of the bottom end of the material storage box, and a dismounting structure is arranged on one side of each adjusting structure. According to the intelligent building outer wall air drying device, the wheels are arranged, the suckers are arranged on the wheels, so that the friction force between the suckers and the outer wall of the intelligent building can be increased, the rotating wheels can drive the belt to rotate, and the rotating belt drives the rotating rod to rotate, so that the effect of rotating the fan blades is achieved by the mutual matching of the main gear and the auxiliary gears on the rotating rod, and the effect of air drying of the coated raw materials is achieved.)

1. The utility model provides a device is applied paint with a brush to outer wall for construction, includes sprue (4), roof (5), servo motor (13) and storage case (14), its characterized in that: a servo motor (13) is installed at the middle position of the top end of the top plate (5), supports (12) are fixedly connected to the two sides of the bottom end of the servo motor (13), a winding disc (11) is fixedly connected to one side of the servo motor (13), a rope (9) is wound on the outer surface of the winding disc (11), fixed pulleys (8) are installed on the two sides of the winding disc (11), the rope (9) is wound on the outer surface of the fixed pulleys (8) and extends to the bottom end of the top plate (5), a hook (7) is installed at the bottom end of the rope (9), a hanging ring (6) is movably connected to the bottom end of the hook (7), a connecting piece (15) is fixedly connected to the bottom end of the hanging ring (6), a storage box (14) is fixedly connected to the bottom end of the connecting piece (15), and a driving motor (10) is fixedly connected to the middle position of the, the bottom of the driving motor (10) is fixedly connected with a rotary column (17), stirring rods (16) are mounted at two ends of two sides of the rotary column (17), one side of the top end of the outer wall of the storage box (14) is movably connected with a filling opening (4), two sides of the storage box (14) are movably connected with heat dissipation structures (3), each heat dissipation structure (3) comprises a wheel (301), a transmission shaft (302), a belt (303), a fixing plate (304), a rotating rod (305), a main gear (306), a driven gear (307), fan blades (308), a fixing ring (309) and a sucking disc (310), the fixing plates (304) are fixedly connected with two sides of the storage box (14), the transmission shaft (302) is fixedly connected with one side of the fixing plate (304), the wheel (301) is fixedly connected with one side of the transmission shaft (302), and an adjusting structure (2) is fixedly connected with two sides of the bottom end of, and a dismounting structure (1) is arranged on one side of the adjusting structure (2).

2. The exterior wall painting device for building construction according to claim 1, wherein: dismantle structure (1) including dismantling piece (101), dismantlement groove (102), first spring (103), fixed block (104), coating (105), change groove (106), paint roller (107), connecting rod (108), bearing (109) and change piece (110), paint roller (107) and install in the bottom of storage case (14), the surface winding of painting roller (107) has coating (105), change groove (106) are all installed to the both sides of coating (105) surface, the internally mounted who changes groove (106) has change piece (110).

3. The exterior wall painting device for building construction according to claim 2, wherein: a bearing (109) penetrates through the inside of the replacing block (110), and the bearing (109) extends to the outside of the replacing groove (106) and is fixedly connected with the smearing roller (107).

4. The exterior wall painting device for building construction according to claim 3, wherein: scribble equal fixedly connected with in both sides of roller (107) inside and dismantle groove (102), the inside of dismantling groove (102) is provided with dismantlement piece (101), dismantle groove (102) and dismantle piece (101) and match and fit, and dismantle and constitute the block structure between piece (101) and the dismantlement groove (102).

5. The exterior wall painting device for building construction according to claim 4, wherein: fixed block (104) are installed on the top of daubing roller (107), the equal fixedly connected with first spring (103) in both sides of fixed block (104) inside, connecting rod (108) are installed to one side of first spring (103), and first spring (103) are provided with four groups altogether.

6. The exterior wall painting device for building construction according to claim 1, wherein: adjust structure (2) including lacing film (201), regulation post (202), fixed column (203), limiting plate (204), second spring (205), base (206), bottom plate (207) and swivelling roller (208), the equal fixed connection in both sides of storage case (14) bottom in bottom plate (207), the bottom fixedly connected with fixed column (203) of bottom plate (207), the inside of fixed column (203) is provided with adjusts post (202), the inside of adjusting post (202) is run through has swivelling roller (208), and swivelling roller (208) extend to the outside of fixed column (203).

7. The exterior wall painting device for building construction according to claim 6, wherein: limiting plates (204) are wound on two sides of the outer surface of the rotating roller (208), a second spring (205) is arranged on the outer surface of the adjusting column (202), a base (206) is fixedly connected to the top end of the second spring (205), the base (206) is connected with the bottom of the storage box (14), hanging pieces (201) are fixedly connected to the bottom end of the second spring (205), and the hanging pieces (201) are connected with the outer surface of the adjusting column (202).

8. The exterior wall painting device for building construction according to claim 1, wherein: the outer surface of wheel (301) all installs sucking disc (310), and sucking disc (310) are the annular distribution on the surface of wheel (301).

9. The exterior wall painting device for building construction according to claim 8, wherein: the surface winding of transmission shaft (302) has belt (303), the top winding of belt (303) has rotary rod (305), the both sides of rotary rod (305) surface all twine solid fixed ring (309), the inside intermediate position department of rotary rod (305) installs from gear (307), the bottom from gear (307) both sides all is provided with main gear (306), and main gear (306) and from gear (307) between be 90 contained angle distributions.

10. The exterior wall painting device for building construction according to claim 9, wherein: the fan blade (308) is installed at the top end of the slave gear (307), and the fan blade (308) and the slave gear (307) are in a welding integrated structure.

Technical Field

The invention relates to the technical field of buildings, in particular to an external wall painting device for building construction.

Background

Present building body need paint the outside of wall body at the in-process of construction to can not influence the pleasing to the eye of building, and traditional manual work is paintd and is not only had the potential safety hazard, and paint not even enough in addition, make the work efficiency underground of paining, in addition, use this kind of traditional device expense of paining still to increase, so need a full automatic mechanization to paint the device and replace this traditional device, but this kind of device of current still has certain problem and defect.

The external wall painting device for building construction is inconvenient to air-dry the wall body when painting in the using process, so a novel painting device needs to be manufactured to solve the problems.

Disclosure of Invention

The invention aims to provide an external wall painting device for building construction, and aims to solve the problem that the device in the background technology is inconvenient to blow dry when an intelligent building is painted.

In order to achieve the purpose, the invention provides the following technical scheme: an outer wall coating device for building construction comprises a filling port, a top plate, a servo motor and a storage box, wherein the servo motor is installed at the middle position of the top end of the top plate, supports are fixedly connected to two sides of the bottom end of the servo motor, a winding disc is fixedly connected to one side of the servo motor, a rope is wound on the outer surface of the winding disc, fixed pulleys are installed on two sides of the winding disc, the rope is wound on the outer surface of the fixed pulleys and extends to the bottom end of the top plate, a hook is installed at the bottom end of the rope, a hanging ring is movably connected to the bottom end of the hook, a connecting sheet is fixedly connected to the bottom end of the hanging ring, the storage box is fixedly connected to the bottom end of the connecting sheet, a driving motor is fixedly connected to the middle position of the top end of the storage box, a rotary column is fixedly connected to the bottom end, one side swing joint on storage case outer wall top has the sprue, and the equal swing joint in both sides of storage case has heat radiation structure, heat radiation structure includes wheel, transmission shaft, belt, stationary blade, rotary rod, master gear, follows gear, flabellum, solid fixed ring and sucking disc, the equal fixed connection in both sides of storage case of stationary blade, the equal fixedly connected with transmission shaft in one side of stationary blade, one side fixedly connected with wheel of transmission shaft, the equal fixedly connected with in both sides of storage bottom of the case adjusts the structure, adjust one side of structure and install the dismantlement structure.

Preferably, dismantle the structure including dismantling the piece, dismantle groove, first spring, fixed block, coating, change the groove, paint roller, connecting rod, bearing and change piece, paint the roller and install in the bottom of storage case, the surface winding of painting the roller has the coating, the change groove is all installed to the both sides of coating surface, the internally mounted who changes the groove has the change piece.

Preferably, a bearing penetrates through the inside of the replacing block, extends to the outside of the replacing groove and is fixedly connected with the smearing roller.

Preferably, paint the equal fixedly connected with in both sides of roller inside and dismantle the groove, the inside in dismantlement groove is provided with dismantles the piece, it suits with dismantling the piece to dismantle the groove, and dismantles and constitutes the block structure between piece and the dismantlement groove.

Preferably, the fixed block is installed on the top of daubing the roller, the equal fixedly connected with first spring in both sides of fixed block inside, the connecting rod is installed to one side of first spring, and first spring is provided with four groups altogether.

Preferably, adjust the structure and include the lacing film, adjust post, fixed column, limiting plate, second spring, base, bottom plate and rotatory roller, the equal fixed connection in the both sides of storage bottom of the case portion of bottom plate, the bottom fixedly connected with fixed column of bottom plate, the inside of fixed column is provided with adjusts the post, the inside of adjusting the post is run through there is the rotatory roller, and the rotatory roller extends to the outside of fixed column.

Preferably, the limiting plate has all been twined to the both sides of rotatory roller surface, the surface of adjusting the post is provided with the second spring, the top fixedly connected with base of second spring, and the base is connected with the bottom of storage case, the bottom fixedly connected with lacing film of second spring, and the lacing film is connected with the surface of adjusting the post.

Preferably, the outer surface of the wheel is provided with suckers, and the suckers are distributed on the surface of the wheel in an annular shape.

Preferably, the surface winding of transmission shaft has the belt, the top winding of belt has the rotary rod, the both sides of rotary rod surface all twine solid fixed ring, the inside intermediate position department of rotary rod installs from the gear, all be provided with the master gear from the bottom of gear both sides, and the master gear with from being 90 contained angles between the gear and distributing.

Preferably, the fan blade is mounted at the top end of the slave gear, and the fan blade and the slave gear are in a welding integrated structure.

Compared with the prior art, the invention has the beneficial effects that: the external wall painting device for intelligent building construction not only realizes the convenient drying of the intelligent building when the painting is carried out again, but also realizes the convenient disassembly of the painting roller, the convenient replacement of the coating on the surface and the convenient adjustment of the angle of the painting roller;

(1) through the arrangement of the heat dissipation structure, when an intelligent building is built, in order not to affect the attractiveness, the outer wall of the intelligent building needs to be painted, at the moment, the device can be placed at a specified position, then an external power supply is switched on, a servo motor is started, the servo motor drives a winding disc beside to rotate, the rope is wound on the winding disc, the rope plays a role of ascending and descending, the rope and a hook are fixed with each other, the hook is hung on a hanging ring, so that the rope drives a storage box to ascend and descend, raw materials are injected into the storage box through a filling port before the storage box ascends and descends, then the raw materials are sprayed to a painting roller to paint the outer wall of the intelligent building, in the process of painting, in order to increase the efficiency and quality of the painting, suckers are arranged on wheels, and can increase the friction force with the outer wall of the intelligent building, when the friction force is increased, the rotation of the wheels can drive the belt to rotate, and the rotating belt drives the rotating rod to rotate, so that the effect of rotating the fan blades is achieved by the mutual matching of the main gear and the auxiliary gear on the rotating rod, and the effect of air drying the coated raw materials is achieved;

(2) by arranging the dismounting structure, when the device is used for painting the outer wall of an intelligent building, when the painting roller needs to be dismounted due to overlong service life, the connecting rod can be directly pulled by hand, the connecting rod enables the connecting rod to expand outwards under the action of the elastic force of the first spring above the connecting rod, and when the connecting rod expands until the dismounting block is separated from the dismounting groove, the effect of dismounting the painting roller is achieved;

(3) through being provided with the regulation structure, when intelligent building outer wall is paintd to needs, when meetting the outer wall unevenness at ordinary times, because the bottom at the storage case is installed at second spring top, the surface at the regulation post is installed to the bottom of second spring, according to the effect of second spring elasticity, make the regulation post rotatory on the surface at the inside rotatory roller of fixed column, rotatory roller plays the effect spacing to rotatory roller through the limiting plate on the surface, make the second spring inwards compress and outwards expand, thereby realized can adjust the effect of painting the roller at any time when paining uneven wall body.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is an enlarged partial cross-sectional view taken at A in FIG. 1 according to the present invention;

FIG. 4 is a front enlarged partial structural view of the disassembling structure of the present invention;

FIG. 5 is a schematic side view of the present invention;

fig. 6 is a schematic front sectional view of the present invention.

In the figure: 1. disassembling the structure; 101. disassembling the block; 102. disassembling the groove; 103. a first spring; 104. a fixed block; 105. coating; 106. replacing the groove; 107. a coating roller; 108. a connecting rod; 109. a bearing; 110. replacing the block; 2. an adjustment structure; 201. hanging a piece; 202. an adjustment column; 203. fixing a column; 204. a limiting plate; 205. a second spring; 206. a base; 207. a base plate; 208. a rotating roller; 3. a heat dissipation structure; 301. a wheel; 302. a drive shaft; 303. a belt; 304. a fixing sheet; 305. rotating the rod; 306. a main gear; 307. a slave gear; 308. a fan blade; 309. a fixing ring; 310. a suction cup; 4. a material injection port; 5. a top plate; 6. hanging a ring; 7. hooking; 8. a fixed pulley; 9. a rope; 10. a drive motor; 11. a winding disc; 12. a support; 13. a servo motor; 14. a material storage box; 15. connecting sheets; 16. a stirring rod; 17. and (4) rotating the column.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, an embodiment of the present invention is shown: an outer wall brushing device for building construction comprises a filling port 4, a top plate 5, a servo motor 13 and a material storage box 14, wherein the servo motor 13 is installed at the middle position of the top end of the top plate 5, a support 12 is fixedly connected to both sides of the bottom end of the servo motor 13, a winding disc 11 is fixedly connected to one side of the servo motor 13, a rope 9 is wound on the outer surface of the winding disc 11, fixed pulleys 8 are installed on both sides of the winding disc 11, the rope 9 is wound on the outer surface of the fixed pulleys 8 and extends to the bottom end of the top plate 5, a hook 7 is installed at the bottom end of the rope 9, a hanging ring 6 is movably connected to the bottom end of the hook 7, a connecting sheet 15 is fixedly connected to the bottom end of the hanging ring 6, the material storage box 14 is fixedly connected to the bottom end of the connecting sheet 15, a driving motor 10 is fixedly connected to the middle position of the top end of the material storage box, one side of the top end of the outer wall of the storage tank 14 is movably connected with a feeding port 4, both sides of the storage tank 14 are movably connected with heat dissipation structures 3, each heat dissipation structure 3 comprises a wheel 301, a transmission shaft 302, a belt 303, a fixed plate 304, a rotary rod 305, a main gear 306, a driven gear 307, fan blades 308, a fixed ring 309 and a suction cup 310, each fixed plate 304 is fixedly connected to both sides of the storage tank 14, each fixed plate 304 is fixedly connected with the transmission shaft 302, each transmission shaft 302 is fixedly connected with a wheel 301, each suction cup 310 is mounted on the outer surface of the wheel 301, the suction cups 310 are annularly distributed on the surface of the wheel 301, the belt 303 is wound on the outer surface of the transmission shaft 302, the rotary rod 305 is wound on the top end of the belt 303, the fixed ring 309 is wound on both sides of the outer surface of the rotary rod 305, the driven gear 307, the main gear 306 and the driven gear 307 are distributed at an included angle of 90 degrees, the top end of the driven gear 307 is provided with a fan blade 308, and the fan blade 308 and the driven gear 307 are in a welding integrated structure;

specifically, as shown in fig. 1, fig. 2, fig. 5 and fig. 6, when the mechanism is used, firstly, when an intelligent building is built, in order not to affect the appearance, the outer wall of the intelligent building needs to be painted, at this time, the device can be placed at a specified position, then an external power supply is switched on, a servo motor 13 is started, the servo motor 13 drives a winding disc 11 on one side to rotate, as a rope 9 is wound on the winding disc 11, the rope 9 has an up-and-down lifting effect, the rope 9 and a hook 7 are fixed to each other, the hook 7 is hung on a hanging ring 6, so that the rope 9 drives a storage box 14 to move up and down, before the storage box 14 moves up and down, raw materials are injected into the storage box 14 through an injection port 4, then the raw materials are sprayed to a painting roller 107 to paint the outer wall of the intelligent building, and in the process of the painting, in order to increase the efficiency and quality of the painting, the wheel 301 is provided with the sucking disc 310, the sucking disc 310 can increase the friction force with the outer wall of the intelligent building, the belt 303 can be driven to rotate by the rotation of the wheel 301 while the friction force is increased, the rotating belt 303 drives the rotating rod 305 to rotate, so that the effect of rotating the fan blades 308 by the mutual matching of the main gear 306 on the rotating rod 305 and the auxiliary gear 307 is achieved, and the effect of air drying the coated raw materials is achieved;

the two sides of the bottom end of the storage box 14 are fixedly connected with the adjusting structures 2, each adjusting structure 2 comprises a hanging piece 201, an adjusting column 202, a fixing column 203, a limiting plate 204, a second spring 205, a base 206, a bottom plate 207 and a rotating roller 208, the bottom plate 207 is fixedly connected to the two sides of the bottom end of the storage box 14, the fixing column 203 is fixedly connected to the bottom end of the bottom plate 207, the adjusting column 202 is arranged inside the fixing column 203, the rotating roller 208 penetrates through the adjusting column 202, the rotating roller 208 extends to the outside of the fixing column 203, the limiting plates 204 are wound on the two sides of the outer surface of the rotating roller 208, the second spring 205 is arranged on the outer surface of the adjusting column 202, the base 206 is fixedly connected to the top end of the second spring 205, the base 206 is connected with the bottom of the storage box 14, the hanging piece 201 is fixedly connected to the bottom end of the;

specifically, as shown in fig. 1, fig. 3, fig. 5 and fig. 6, when the intelligent building outer wall needs to be painted, when the outer wall is uneven, because the top of the second spring 205 is installed at the bottom of the storage box 14, and the bottom of the second spring 205 is installed on the surface of the adjusting column 202, according to the action of the elastic force of the second spring 205, the adjusting column 202 rotates on the surface of the rotating roller 208 inside the fixed column 203, and the rotating roller 208 plays a role of limiting the rotating roller 208 through the limiting plate 204 on the surface, so that the second spring 205 is compressed inwards and expanded outwards, thereby realizing the effect of adjusting the painting roller 107 at any time when the uneven wall is painted;

the dismounting structure 1 is installed on one side of the adjusting structure 2, the dismounting structure 1 comprises a dismounting block 101, a dismounting groove 102, a first spring 103, a fixing block 104, a coating 105, a replacing groove 106, a coating roller 107, a connecting rod 108, a bearing 109 and a replacing block 110, the coating roller 107 is installed at the bottom end of the storage box 14, the coating 105 is wound on the outer surface of the coating roller 107, the replacing groove 106 is installed on both sides of the outer surface of the coating 105, the replacing block 110 is installed inside the replacing groove 106, the bearing 109 penetrates through the inside of the replacing block 110, extends to the outside of the replacing groove 106 and is fixedly connected with the coating roller 107, the dismounting groove 102 is fixedly connected on both sides inside the coating roller 107, the dismounting block 101 is arranged inside the dismounting groove 102, the dismounting groove 102 is matched with the dismounting block 101, a clamping structure is formed between the dismounting block 101 and the dismounting groove 102, the fixing block 104 is installed at the top end of, the two sides inside the fixing block 104 are fixedly connected with first springs 103, one side of each first spring 103 is provided with a connecting rod 108, and the first springs 103 are provided with four groups;

specifically, as shown in fig. 1, 4, 5 and 6, when the device is used for painting the outer wall of an intelligent building, when the painting roller 107 needs to be detached after being used for a long time, the connecting rod 108 can be directly pulled by hand, the connecting rod 108 expands outwards according to the elastic force of the upper first spring 103, when the connecting rod 108 expands until the detaching block 101 is detached from the detaching groove 102, the effect of detaching the painting roller 107 is achieved, when the painting roller 107 is detached, the replacing block 110 is rotated by hand, the replacing block 110 rotates to a specified position through the bearing 109, the replacing block 110 can be detached from the replacing groove 106, and the effect of replacing the coating 105 on the surface of the painting roller 107 is achieved.

The working principle is as follows: when the invention is used, firstly, when an intelligent building is built, in order to not affect the appearance, the outer wall of the intelligent building needs to be coated, at the moment, the device can be placed at a specified position, then an external power supply is switched on, the servo motor 13 is started, the servo motor 13 drives the winding disc 11 beside to rotate, the rope 9 is enabled to have the effect of ascending and descending due to the fact that the rope 9 is wound on the winding disc 11, the rope 9 is enabled to have the effect of ascending and descending, the rope 9 and the hook 7 are mutually fixed, the hook 7 is hung on the hanging ring 6, the rope 9 is enabled to drive the storage box 14 to have the effect of ascending and descending, raw materials are injected into the storage box 14 through the injection port 4 before the storage box 14 ascends and descends, then the raw materials are sprayed to the coating roller 107 to coat the outer wall of the intelligent building, and in the coating process, in order to increase the efficiency and the quality of the, the suction cup 310 can increase the friction force with the outer wall of the intelligent building, and when the friction force is increased, the rotation of the wheel 301 can drive the belt 303 to rotate, and the rotating belt 303 drives the rotating rod 305 to rotate, so that the effect of rotating the fan blades 308 by the mutual matching of the main gear 306 on the rotating rod 305 and the driven gear 307 is achieved, and meanwhile, the effect of air drying the coated raw materials is achieved.

Afterwards, when the device is used for painting the outer wall of an intelligent building, when the painting roller 107 needs to be disassembled after being used for a long time, the connecting rod 108 can be directly pulled out by hand, the connecting rod 108 enables the connecting rod 108 to expand outwards under the action of the elastic force of the first spring 103 above, when the connecting rod 108 expands until the disassembling block 101 is separated from the disassembling groove 102, the disassembling effect of the painting roller 107 is achieved, when the painting roller 107 is disassembled into two parts, the replacing block 110 is rotated by hand, the replacing block 110 rotates to a specified position through the bearing 109, the replacing block 110 can be separated from the replacing groove 106, and meanwhile, the effect of replacing the coating 105 on the surface of the painting roller 107 is achieved.

Finally, when the intelligent building outer wall needs to be painted, when encountering the unevenness of the outer wall, because the top of the second spring 205 is installed at the bottom of the storage box 14, the bottom of the second spring 205 is installed on the surface of the adjusting column 202, and under the action of the elastic force of the second spring 205, the adjusting column 202 rotates on the surface of the rotating roller 208 inside the fixed column 203, the rotating roller 208 has the effect of limiting the rotating roller 208 through the limiting plate 204 on the surface, so that the second spring 205 is compressed inwards and expanded outwards, and the effect of the painting roller 107 can be adjusted at any time when the uneven wall is painted is achieved.

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 attributes 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.