KR20200110266A - crushing equipment of construction waste - Google Patents

Abstract

The present invention relates to a device for crushing waste capable of preventing a cancer-causing agent and environmental pollution generated when the waste is disposed by reducing volume of waste by crushing the waste such as waste Styrofoam or waste glass fiber with a first crushing device, and crushing, powdering, and discharging the waste with a second crushing device; and greatly improving simplification of a process, workability, and work efficiency without manually moving the waste in a crushing process by connecting the first crushing device and the second crushing device by a transferring conveyor. The present invention is provided to burn or melt the waste at high temperature by cooling the high temperature generated when the waste is crushed and powdered by the second crushing device, thereby preventing stopping of an operation caused by adhering to a second crushing unit in advance. Disclosed is the device for crushing waste capable of improving crushability for the waste by compressing and crushing the waste; crushing the waste into a powder form; and preventing vibration generation during the operation.

Description

Crushing equipment of construction waste

The present invention relates to a waste shredding device, and more particularly, as the waste such as styrofoam or fiberglass among wastes such as construction waste, marine waste, home appliance packaging waste, and household goods waste is powdered without melting by heating. It relates to a waste shredding device that prevents the generation of carcinogens as well as environmental pollution caused by the incineration of waste.

In general, when the construction life of an old house or building is over, the building is dismantled or demolished.At this time, when the building is dismantled or demolished, concrete, aggregate, reinforcing bars, metal materials, stone, gravel, wood, paper, fiberglass, as well as styrofoam Various construction waste materials such as, etc. are generated in large quantities.

In addition, styrofoam waste is widely generated in marine waste, packaging waste, and household goods waste in addition to construction materials. This is a foamed polystyrene foam made of polystyrene in the case of styrofoam, which is white and light, and has water resistance. ), insulation, sound insulation, buffering properties, etc., so it is widely used as a packaging material, building material, buoyancy material, and insulation material.

Such styrofoam does not decay and generates harmful gases when incinerated, so recycling is strongly recommended because it has become a major cause of polluting the natural environment.However, due to the characteristics of styrofoam, its density is small and its volume is large. There are disadvantages such as costly transportation.

In addition, it is important to crush the collected waste styrofoam in small pieces and transport it to the recycling plant in a state that minimizes the volume, but it is mainly cut into small-sized particles using a heating wire, or by dissolving the waste styrofoam using chemicals or heaters. Most are transported in (gel) state.

However, in the case of cutting while melting the waste Styrofoam with a heating wire or melting the Styrofoam by heating it with a heater, considerable harmful gases as well as first-rate carcinogens are generated during the melting process of the waste Styrofoam, which harms the health of the worker as well as the surrounding area. There is a problem that the air environment of is polluted.

Moreover, in the case of waste glass fiber, since it is made of non-combustible material, it cannot be incinerated, so as it is buried in a compressed state and discarded, there is a problem of generating groundwater pollution as well as soil pollution and destroying the environment.

Looking at the prior art, a device for crushing and sorting construction waste, which is No. 20-0370561 for the registration office, was devised, and this is a device that selects materials of various sizes from construction waste inputted to the hopper on one frame and discharges them to each conveyor. In the above, a screw conveyor installed at the lower end of the hopper and crushing and transporting the inputted waste, a roller mechanism having an upper roller and a lower roller having a different diameter and driven by respective motors facing each other on a downstream side of the screw conveyor, and the A magnet installed on the downstream side of the roller mechanism and attached to metallic foreign substances. A sorting means for collecting and sorting in multiple stages by particle size, and a cylindrical net installed at the middle or end of the sorting means, and foreign matters are removed from one end with a blower. It consists of a dust collector that blows out.

This prior art is selected so that it can be recycled by crushing construction waste, but as mentioned above, there is no work on waste styrofoam or waste glass fiber.

As another example, a styrofoam shredding device of Patent No. 10-1935590 has been devised, which is a belt conveyor that transfers the collected styrofoam to a crusher, and is installed on one side of the belt conveyor to remove the object to be removed attached to the styrofoam while removing the styrofoam. A styrofoam input member transferred to a crusher, a styrofoam crushing member crushing the styrofoam transferred by the styrofoam input member to a predetermined size, a foreign substance removing member for removing foreign substances contained in the styrofoam crushed by the styrofoam crushing member, A suction and transfer fan installed in a transfer pipe so that the styrofoam crushed by the styrofoam crushing member is transferred, a styrofoam storage tank in which the styrofoam transferred along the transfer pipe is stored, so that the styrofoam injected into the styrofoam storage tank does not stick to each other. It is provided as an anti-aggregation member installed in the styrofoam storage tank.

This prior art allows the removal of the object to be removed attached to the waste Styrofoam while transporting the waste Styrofoam instead of by hand, and allows the number of workers required to remove the object to be removed attached to the waste Styrofoam to be drastically reduced. Since it is made only by the crushing member, the waste styro product cannot be pulverized, and the waste glass fiber is difficult to crush.

Accordingly, there is an urgent need for a waste crushing technology that enables not only waste Styrofoam but also waste glass fibers to be pulverized and discarded, as well as preventing carcinogens from being blown into the air during the crushing process. .

Korean Registered Office No. 20-0370561 (Registered on Dec. 6, 2004) Korean Patent Registration No. 10-1935590 (Registered on Dec 28, 2018)

The present invention is to reduce the volume of the waste by pulverizing waste such as styrofoam or glass fiber among wastes such as construction waste, marine waste, household appliance packaging waste, and household goods waste with a primary grinder to reduce the volume of the waste, and then to rebuild the reduced waste. Its purpose is to provide a waste crushing device capable of preventing the generation of carcinogens as well as environmental pollution caused by incineration of the waste by pulverizing and pulverizing the waste without melting it by heating.

The waste crushing apparatus of the present invention as a means for achieving the above object, in the waste crushing apparatus in which waste is input and pulverized, comprising: a first crushing device for reducing the volume of waste by first crushing the waste; A second crusher for crushing and pulverizing waste by crushing by the first crusher and reducing the volume; And a transfer conveyor for transferring the waste crushed by the primary crusher to the secondary crusher, wherein the secondary crusher includes: a secondary crusher frame positioned at one side of the first crusher; A secondary shredder body seated and supported on the upper surface of the secondary shredder frame; A secondary shredder hopper provided at an upper end of the secondary shredder body, the wastes transferred through a transfer conveyor after being shredded by the primary shredder are input and having a hopper cover; A secondary crusher upper cover extending from one side of the secondary crusher body and a secondary crusher lower cover which is bolted and fixed with the secondary crusher upper cover; A secondary crushing shaft provided along the longitudinal direction of the secondary crusher body, the secondary crushing machine upper cover and the secondary crushing machine lower cover, and having a secondary crushing part along the longitudinal direction of the outer peripheral surface; A second crushing reduction unit connected to one side of the second crushing shaft; It consists of provided with a second crushing drive unit for transmitting power to the second crushing and reduction unit.

The present invention is to reduce the volume of waste by first pulverizing waste such as waste Styrofoam or waste glass fiber with a first crusher, and then using a second crusher to crush and powder the waste, thereby disposing of the waste. Of course, not only can environmental pollution be prevented, but as the primary and secondary shredders are connected by a transfer conveyor, wastes do not have to be moved manually in the crushing process, simplifying the process, as well as improving workability and work efficiency. It can be greatly improved, and as it cools the high temperature generated when the waste is crushed and powdered by the secondary crusher, it prevents the waste from burning or melting due to the high temperature and sticking to the secondary crusher and stopping the operation. Because the waste is compressed and pulverized, it can be pulverized into a powder form as well as improved pulverization of the waste, and vibration during operation can be prevented.

1 is a perspective view showing a waste crushing apparatus according to the present invention.
Figure 2 is an exploded perspective view showing the configuration of the second crusher of the present inventors waste shredding device.
3 and 5 are configuration diagrams each showing the configuration of the secondary crusher of the present inventors waste shredding device.
6 is a block diagram showing one of the constituent parts of the waste crushing apparatus of the present invention.
7 is an exploded perspective view showing one of the constituent parts of the waste crushing apparatus of the present invention.
8 is a block diagram showing one of the constituent parts of the waste crushing apparatus of the present invention.

Hereinafter, in addition to the above objects, other objects and features of the present invention will be clearly revealed through the description of the embodiments with reference to the accompanying drawings.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

Hereinafter, a waste crushing apparatus according to an embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

As shown, the present invention relates to a waste shredding device in which waste is input and pulverized, and the waste is first shredded to reduce the volume of the waste by a first shredder 100 and the first shredder 100 A secondary shredder 200 for crushing and pulverizing waste by crushing and reducing the volume thereof, and a transfer conveyor 300 for transferring the waste crushed by the first crusher 100 to the secondary shredder 200 side It is made including.

The present invention made as described above minimizes the volume of waste by first crushing wastes such as waste styrofoam or waste glass fiber with the first shredder 100, and then automatically transferred to the second shredder 200 by the transfer conveyor 300 As a result of the secondary crushing, the waste is pulverized and disposed of, thereby preventing environmental pollution or the discharge of carcinogens caused by waste disposal.

Furthermore, in the present invention, since wastes such as waste styrofoam and waste glass fibers are pulverized into a completely powdered form by the secondary crusher 200, the waste can be easily disposed of, thereby preventing soil pollution or environmental pollution.

To this end, the second crusher 200 of the present invention includes a second crusher frame 210 located on one side of the first crusher 100, and a second crusher body seated and supported on the upper surface of the second crusher frame 110 (220) And, the waste is provided on the upper end of the secondary shredder body 220, crushed by the primary shredder 100, and then transferred through the conveying conveyor 300, and has a hopper cover 231 It consists of a secondary shredder hopper (230).

As the second crusher hopper 230 of the second crusher 200 is made by connecting the other end of the transfer conveyor 300 connected to the first crusher 100, as shown, by the first crusher 100 As the first crushed waste is automatically transferred to the secondary shredder 200 by the transfer conveyor 300, the process of directly transferring the waste can be omitted, so work efficiency as well as convenience are Greatly improved.

In addition, the second crusher 200 according to the present invention includes a secondary crusher upper cover 240 and a secondary crusher upper cover 240 and a bolted-fixed secondary crusher lower part extending from one side of the secondary crusher body 220 A cover 250 is provided.

The secondary crusher upper cover 240 and the secondary crusher lower cover 250 are made of a polygonal shape, which means that the wastes injected into the secondary crusher body 220 are the secondary crusher upper cover 240 and the secondary This is to ensure that the waste is compressed and pulverized in close contact with the inner surfaces of the secondary crusher upper cover 240 and the secondary crusher lower cover 250 made of a polygonal shape when the waste is compressed and pulverized while passing through the inside of the crusher lower cover 250.

At this time, the secondary crusher upper cover 240 and the secondary crusher lower cover 250 may be formed in a 16-sided shape.

In addition, the secondary crusher upper cover 240 and the secondary crusher lower cover 250 are bolted to each other, which is located inside the secondary crusher upper cover 240 and the secondary crusher lower cover 250 This is to facilitate assembly and installation of the secondary crushing unit 260 as well as to facilitate repair and maintenance work.

That is, the secondary crusher 200 of the present invention is provided along the longitudinal direction of the secondary crusher body 220 and the secondary crusher upper cover 240 and the secondary crusher lower cover 250 and along the longitudinal direction of the outer circumferential surface. A secondary crushing shaft 270 provided with a secondary crushing unit 260, a secondary crushing reduction unit 280 connected to one side of the secondary crushing shaft 270, and the secondary crushing reduction unit 280 ) Is provided with a secondary crushing drive unit 290 that transmits power to.

In this way, as the secondary crushing part 260 is provided along the inner longitudinal direction of the secondary crushing machine upper cover 240 and the secondary crushing machine lower cover 250, cleaning or repairing the secondary crushing part 260 By separating the secondary shredder upper cover 240 and the secondary shredder lower cover 250, which are bolted to each other when repairing, it can be easily cleaned and cleaned or repaired and repaired, greatly improving workability, convenience, and assembly. do.

The secondary crushing unit 260 of the present invention includes an inverted triangle compression crushing blade 261, a conveying crushing blade 262, a primary pressing ratchet crushing blade 263 and a secondary pressing ratchet crushing blade ( 265), and the waste introduced into the secondary crusher body 220 is the inverted triangle compression crushing blade 261, the transfer crushing blade 262, the primary pressing ratchet crushing blade 263, and In the process of passing through the secondary compression ratchet grinding braid 265, it is compressed and pulverized into powder and discharged.

The inverted triangle compression crushing blade 261 is provided with a screw-like protrusion on the outer circumferential surface of the secondary crushing shaft 270, and the secondary crushing machine upper cover 240 and the secondary crushing machine from the inside of the secondary crushing machine body 220 It is positioned to extend into the lower cover 250.

In addition, the transfer crushing blade 262 is provided with a screw-like protrusion on the outer circumference of the secondary crushing shaft 270, and extends from the inverted triangle compression crushing blade 261 to the secondary crushing machine upper cover 240 and the secondary crushing machine It is made by being located inside the lower cover 250.

The waste injected into the secondary shredder body 220 by the inverted triangle compression crushing blade 261 and the conveying crushing blade 262 made as described above is provided in a screw shape on the outer circumference of the secondary shredding shaft 270 and formed in an inverted triangle. As it moves through the compression crushing blade 261 and the transfer crushing blade 262 made, it is strongly adhered to the inner side of the secondary crushing machine upper cover 240 and the secondary crushing machine lower cover 250 so that pressure is transmitted to the waste. Crushing takes place.

Moreover, when the waste is transferred by the rotational operation of the inverted triangle compression crushing blade 261 and the conveying crushing blade 262 of the second crushing unit 260 to the second crushing unit cover 250, the second crushing geometry unit In the process of being compressed and crushed by the inverted triangle compression crushing blade 261 and the conveying crushing blade 262 of the secondary crushing unit 260, the waste placed in the cover 250 is compressed and crushed easily. As a plurality of half-moon-shaped compression ratchets 251 positioned between the inverted triangle compression crushing blade 261 and the transfer crushing blade 262 of the vehicle crushing unit 260 are provided, the inverted triangle compression crushing blade 261 and As the waste is strongly adhered to each other by the conveying crushing blade 262 and the plurality of half-moon-type compression ratchets 251, pressure is generated on the waste, thereby compressing and pulverizing the waste.

At this time, the waste is finely crushed by the inverted triangular compression crushing blade 261, the conveying crushing blade 262, and a plurality of half-moon-shaped pressing ratchets 251 and transferred to the primary pressing ratchet crushing blade 263 side.

The primary compression ratchet crushing blade 263 is extended from the conveying crushing blade 262 and provided in plurality on the outer circumferential surface of the secondary crushing shaft 270, but one side is welded to the conveying crushing blade 262 and the other side is 2 The secondary crushing shaft 270 is welded and fixed to the outer circumferential surface of the secondary crushing shaft 270 to be provided inclined with respect to the secondary crushing shaft 270.

The waste is further finely pulverized through the primary compression ratchet crushing blade 263 rotated by compression pulverization of the waste by the primary compression ratchet pulverization blade 263 of the present invention, which is made as described above. The compression ratchet crushing blade 263 is welded and fixed to the transfer crushing blade 262 on one side, and the other side is welded to the outer circumferential surface of the secondary crushing shaft 270 to be provided inclined with respect to the secondary crushing shaft 270. It is possible accordingly.

The secondary crushing ratchet crushing braid 265 is provided with a plurality of conical pressing portions 264 extending from the other end of the secondary crushing shaft 270 and a plurality of the circumferential surfaces of the conical pressing portions 264.

The secondary compression ratchet crushing blade 265 made as described above is crushed by the primary compression ratchet crushing blade 263 to more strongly compress and compress the transferred waste to pulverize the waste into a powder form, This is because a plurality of secondary compression ratchet grinding blades 265 are provided along the circumferential surface of the conical compression portion 264 extending from the other end of the secondary crushing shaft 270 to be rotated. It is guided and collected, and the waste is compressed and compressed more strongly by the secondary compression ratchet crushing blade 265 to pulverize the waste into a powder form.

In addition, it is provided at the end of the secondary crusher lower cover 250 so as to be located at the lower side of the primary pressing ratchet crushing blade 263 and the secondary pressing ratchet crushing blade 265, and a lower compression contact part on the outer surface. A lower compression cover 510 having 511, and the secondary crushing machine upper cover 240 so as to be located on the upper side of the primary compression ratchet grinding braid 263 and the secondary compression ratchet grinding braid 265 Provided at the end of the second shredder upper cover 240 is hinge-connected to the end of the lower compression cover 510 is lowered in the direction of the upper compression contact portion 521 positioned to correspond to the lower compression contact portion 511 Having an upper compression cover 520, a hinge elevating link 530 provided on an upper end of the upper compression cover 520, and a hinge elevating link 530 provided on an upper end of the upper compression cover 520 It consists of a hydraulic cylinder 540 having a cylinder rod 541 to be connected.

Accordingly, the waste compressed and crushed by the inverted triangle compression crushing blade 261 and the conveying crushing blade 262 is compressed by the primary pressing ratchet crushing blade 263 and the secondary pressing ratchet crushing blade 265. When compression crushed and pulverized, compression crushing of waste is easily performed.

That is, when the cylinder rod 541 of the hydraulic cylinder 540 is pulled out and the upper end of the hinge elevating link 530 is pushed, the upper compression cover 520 is lowered toward the lower compression cover 510 and the primary compression ratchet By narrowing the section of the ratchet crushing blade 263 and the second pressing ratchet crushing blade 265, the waste is located in the first pressing ratchet crushing blade 263 and the second pressing ratchet crushing blade 265. Since the compression is more tightly pressed and compressed, the waste can be strongly compressed and crushed in a powder form by the primary compression ratchet grinding blade 263 and the secondary compression ratchet grinding blade 265.

In the present invention, a water circulation tank 410 is provided at the bottom of the secondary crusher frame 210, and a plurality of spray nozzles 420 are provided in the hopper cover 231 provided in the secondary crusher hopper 230, A water circulation pump 430 for circulating and supplying water by connecting the water circulation tank 410 and a plurality of injection nozzles 420 is provided.

In the present invention made as described above, as the water contained in the water circulation tank 410 is injected into the secondary crusher hopper 230 through the spray nozzle 420 and is introduced into the secondary crusher body 220, the 2 Since the high temperature generated when the waste is compressed and crushed by the secondary crushing unit 260 can be cooled, the waste is burned or melted by the high temperature to prevent the operation from being stopped by sticking to the secondary crushing unit 260 can do.

As described above, in the present invention, specific matters such as specific components, etc., and limited embodiments and drawings have been described, but this is provided only to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. Anyone of ordinary skill in the art to which the present invention belongs can make various modifications and variations from this description.

Accordingly, the spirit of the present invention is limited to the described embodiments and should not be defined, and all things equivalent or equivalent to the claims as well as the claims to be described later belong to the scope of the inventive concept.

100: 1st crusher 200: 2nd crusher
210: secondary shredder frame 220: secondary shredder body
230: secondary crusher hopper 231: hopper cover
240: secondary crusher upper cover 250: secondary crusher lower cover
251: half-moon compression pallet 260: secondary crushing part
261: compression crushing blade 262: conveying crushing blade
263: primary crimp ratchet grinding blade 264: conical crimp portion
265: secondary compression ratchet grinding blade 270: secondary grinding shaft
280: 2nd crushing and reducing part 290: 2nd crushing driving part
300: transfer conveyor 410: water circulation tank
420: injection nozzle 430: water circulation pump
510: lower compression cover 511: lower compression contact portion
520: upper compression cover 521: upper extrusion contact
530: hinge elevating link 540: hydraulic cylinder
541: cylinder rod

Claims (5)

In the waste crushing device in which waste is input and crushed,
A first crusher 100 for reducing the volume of the waste by first crushing the waste;
A secondary crusher 200 for crushing and pulverizing waste by crushing by the first crusher 100 to reduce the volume of waste;
Includes a transfer conveyor 300 for transporting the waste crushed by the primary crusher 100 to the secondary crusher 200 side,
The secondary crusher 200,
A secondary crusher frame 210 positioned at one side of the primary crusher 100;
A second crusher body 220 that is seated and supported on the upper surface of the second crusher frame 110;
Secondary shredder hopper having a hopper cover 231, which is provided on the upper end of the secondary shredder body 220, is crushed by the primary shredder 100, and then the waste transferred through the transfer conveyor 300 is put into it. 230) and;
A secondary crusher upper cover 240 and a secondary crusher upper cover 240 and a secondary crusher lower cover 250 which are bolted and fixed from one side of the secondary crusher body 220;
Secondary crushing provided along the longitudinal direction of the secondary crusher body 220, the secondary crushing machine upper cover 240 and the secondary crushing machine lower cover 250 and provided with a secondary crushing portion 260 along the longitudinal direction of the outer circumferential surface A shaft 270;
A second crushing reduction unit 280 connected to one side of the second crushing shaft 270;
Waste crushing device, characterized in that provided with a second crushing drive unit 290 for transmitting power to the second crushing reduction unit 280. The method of claim 1,
A water circulation tank 410 is provided at the bottom of the secondary crusher frame 210,
A plurality of spray nozzles 420 are provided in the hopper cover 231 provided in the secondary crusher hopper 230,
The water contained in the water circulation tank 410 is sprayed into the secondary shredder hopper 230 through the spray nozzle 420 and introduced into the secondary shredder body 220, whereby the secondary shredding unit 260 A water circulation pump 430 for circulating and supplying water by connecting the water circulation tank 410 and a plurality of spray nozzles 420 is provided to cool the high temperature generated when the waste is compressed and crushed by ). Waste shredding device. The method of claim 1,
The secondary crushing part 260,
The secondary crushing shaft 270 is provided protruding in a screw shape on the outer circumferential surface of the second crusher body 220, the secondary crushing machine upper cover 240 and the secondary crushing machine lower cover 250 is extended from the inside An inverted triangle compression crushing blade 261;
The secondary crushing shaft 270 is provided protruding in a screw shape on the outer circumferential surface, and is extended from the inverted triangle compression crushing blade 261 to be located inside the secondary crushing machine upper cover 240 and the secondary crushing machine lower cover 250 A feed crushing blade 262;
A plurality of pieces are provided on the outer circumferential surface of the secondary crushing shaft 270 extending from the transport crushing blade 262, but one side is welded to the transport crushing blade 262 and the other side is welded to the outer circumference of the secondary crushing shaft 270, A primary pressing ratchet crushing blade 263 provided inclined with respect to the crushing shaft 270;
It characterized in that the secondary crushing shaft 270 is provided with a conical pressing portion 264 extending from the other end and a secondary pressing ratchet crushing braid 265 provided in a plurality along the circumferential surface of the conical pressing portion 264 Waste shredding device. The method of claim 3,
In the second crusher lower cover 250,
When waste is transferred by the rotational operation of the inverted triangular compression crushing blade 261 and the transfer crushing blade 262 of the secondary crushing unit 260, the waste located in the secondary crushing machine lower cover 250 is The inverted triangle compression crushing braid of the secondary crushing part 260 to facilitate compression and crushing in the process of being compressed and crushed by the inverted triangle compression crushing blade 261 and the conveying crushing blade 262 of the crushing unit 260 A waste crushing device, characterized in that a plurality of half-moon-shaped compression ratchets 251 positioned between the 261 and the transfer crushing blade 262 are provided. The method of claim 3,
The waste compressed by the inverted triangle compression crushing blade 261 and the conveying crushing blade 262 is compressed and crushed by the primary pressing ratchet crushing blade 263 and the secondary pressing ratchet crushing blade 265 To facilitate compression and crushing of waste when powdered,
It is provided at the end of the secondary crusher lower cover 250 so as to be located at the lower side of the primary pressing ratchet crushing blade 263 and the secondary pressing ratchet crushing blade 265, and a lower compression contact part 511 on the outer surface. ) And a lower compression cover 510;
It is provided at the end of the secondary crusher upper cover 240 so as to be located on the upper side of the primary pressing ratchet crushing blade 263 and the secondary pressing ratchet crushing blade 265, the end of the secondary crusher upper cover 240 An upper compression cover 520 having an upper compression contact portion 521 that is hinge-connected to and descends in a direction toward the lower compression cover 510 and is positioned to correspond to the lower compression contact portion 511;
A hinge elevating link 530 provided on an upper end of the upper compression cover 520;
A waste crushing device comprising a hydraulic cylinder 540 provided on an upper end of the upper compression cover 520 and having a cylinder rod 541 connected to an upper end of the hinge elevating link 530.

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