CN220835943U - Plate raw material crushing and screening device - Google Patents

Abstract

The utility model provides a plate raw material crushing and screening device, and belongs to the technical field of plate processing; including box and feeding frame, feeding frame fixed connection is in the top of box, install the rubbing crusher who is used for smashing panel in the box and construct, fixedly connected with funnel on the box inner wall, install vibration mechanism and screening mechanism in the box, vibration mechanism with screening mechanism is located the below of funnel. According to the utility model, the screening mechanism and the vibration mechanism are arranged, after the plate raw materials are crushed, the plate raw materials fall onto the first screening plate through the hopper, and the first screening plate, the second screening plate and the solid plate are driven to vibrate due to the vibration of the vibration mechanism, so that the crushed plate raw materials are screened on the first screening plate in vibration, and larger materials after screening can be left on the first screening plate and move through an inclined angle and continuous vibration and fall onto the first discharging baffle plate, so that the plate raw materials leave the box body, and preliminary screening is completed.

Description

Plate raw material crushing and screening device

Technical Field

The utility model relates to the technical field of plate processing, in particular to a plate raw material crushing and screening device.

Background

The state is in the economic construction development period now, and town construction speed is faster and faster, and in town construction's in-process, also is increasing to the demand of various building material, and wherein panel can be used to the component of articles such as ceiling, floor, wall, when processing and abandonment panel raw materials again need smash it earlier, again through screening, compression, multiple technology such as synthetic just can accomplish.

Most of screening plates of the existing crushing devices with screening functions are fixed on a box body, crushed materials are screened through a filter screen directly after falling, screening effects are poor, a motor is used for vibration screening, as shown in CN217069034U, a vibration motor is required to be arranged on the screening plates, when a plurality of layers of screening plates exist, motors are required to be arranged on different screening plates, so that too many motors are caused, and manufacturing cost is increased.

Disclosure of utility model

The utility model aims to solve the technical problem of excessive motors and increased manufacturing cost caused by the fact that motors are required to be arranged on different screening plates when a plurality of layers of screening plates exist in the prior art.

In order to solve the technical problems, the utility model provides the following technical scheme:

The utility model provides a plate raw materials smashing screening device, includes box and feeding frame, feeding frame fixed connection is in the top of box, install the rubbing crusher who is used for smashing panel in the box, fixedly connected with funnel on the box inner wall, install vibration mechanism and screening mechanism in the box, vibration mechanism with screening mechanism is located the below of funnel, one side fixedly connected with of box runs through and extends to first ejection of compact baffle and the third ejection of compact baffle outside the box, the box is installed first ejection of compact baffle with the opposite side fixedly connected with of third ejection of compact baffle runs through and extends to the second ejection of compact baffle outside the box, screening mechanism is including rotating first screening board, second screening board and the entity board that connects gradually, first screening board with the entity board is Z shape setting of arranging, first screening board is hung in the box and is located the below of funnel, first screening board is close to second one end screening board and incline to the second side down the second screening board is close to the second side down incline to the second and is close to the second side down the second and is inclined to the second screening board is reached the second side down and is reached the second end is passed down to the second and is passed down to the second side down the second and is reached the second side is reached the second and is gradually down to the top is connected with the second side of the second screening board.

Preferably, the crushing mechanism comprises a driving motor fixedly connected with one side of the box body, the output end of the driving motor is fixedly connected with a driving shaft, the driving shaft is rotatably sleeved with a driven shaft in the box body, the driving shaft and the driven shaft penetrate through the box body, the driving shaft and the driven shaft are far away from one end of the driving motor, which is fixedly sleeved with gears, the gears are meshed with each other, crushing blades are fixedly sleeved on the driving shaft and the driven shaft, and the crushing blades are used for crushing materials entering the box body.

Preferably, the vibration mechanism comprises a spring base fixedly connected to the inner wall of the bottom of the box body, a vibration motor is fixedly connected to the spring base, a sliding rail is fixedly connected to the inner wall of the box body, a vibration plate is fixedly connected to the vibration motor, the sliding rail is in sliding connection with the vibration plate, a plurality of support columns are fixedly connected to the vibration plate, and the support columns are in contact with the bottoms of the first screening plate, the second screening plate and the entity plate.

Preferably, the funnel is located the below of crushing mechanism, the equal fixedly connected with of both sides side of funnel is a plurality of couple, the equal joint of bottom of couple has the spring couple, the both sides frame fixedly connected with of first screening board a plurality of lantern ring, the bottom of spring couple with the lantern ring joint.

Preferably, the box is fixedly connected with a protective shell, and the gear is arranged in the protective shell.

The box body and the protecting shell are both rotationally connected with a movable door.

Compared with the prior art, the utility model has at least the following beneficial effects:

In the above-mentioned scheme, through setting up screening mechanism and vibration mechanism, after the panel raw materials is smashed, can fall to first screening plate through the funnel, because vibration mechanism's vibrations, first screening plate has been driven, second screening plate and entity board vibrations, make the first screening plate of the panel raw materials in the vibrations of being smashed screen, great material can stay on first screening plate and remove through the angle of slope and continuous vibrations after the screening, fall on running through and extending out the first ejection of compact baffle outside the box, make it leave in the box, accomplish preliminary screening, less material can fall into the below of first screening plate after the screening, carry out further screening through the second screening plate, great material also can stay on the second screening plate after the screening, fall on running through and extending out the second ejection of compact baffle outside the box through the angle of slope with continuous vibrations, accomplish further screening, less material can fall into on the entity board of second screening plate below, fall to all surplus materials that will be screened out through the angle of slope and the disconnected motor that does not fall to make the whole motor and need to make the motor and make the whole of the screening plate and need to make the motor and the whole in the first screening plate because of the vibration is that the setting up, the whole is more than necessary to reduce the cost is required to be had been reduced.

Through setting up the support column, contradict its bottom with first screening plate, second screening plate and entity board, guaranteed the fixed position of first screening plate, second screening plate and entity board, also make when vibrating motor shakes, first screening plate, second screening plate and entity board also can follow its vibrations, the use of supplementary screening function has strengthened screening effect, the mode of the bottom conflict of support column and first screening plate, second screening plate and entity board also lets first screening plate, second screening plate and entity board more make things convenient for with the support column separation simultaneously, when maintenance equipment, only need take off the lantern ring from the spring hanger, with first screening plate, second screening plate and entity board direct outwards take out can, normal maintenance has been made things convenient for.

Through setting up the slide rail, when vibrating motor work vibrations, determined the direction that the vibrations board shaked, guaranteed that the vibrations board can not be to other direction skew when vibrations, and then influence the normal use of screening function.

Through setting up spring hanger and spring base, when vibrating motor work vibrations, can not too much influence other working parts in the box, guarantee the crushing and the screening of panel raw materials can normal operating.

Through setting up crushing mechanism, when needs smash panel raw materials, start driving motor, drive driving shaft, crushing blade are rotatory, and then drive the crushing blade on driven shaft and the driven shaft through intermeshing's gear and rotate, put into the box with the panel raw materials through the feeding frame this moment, make the panel raw materials smashed by the crushing blade of rotation on driving shaft and the driven shaft, simple structure, convenient to use.

Through setting up the protecting crust, protected the gear, reduced the influence that external environment caused the gear, through setting up the dodge gate for when maintaining equipment, only need open the dodge gate, just can operate its inside, it is more convenient to let maintenance repair.

Drawings

The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the disclosure and to enable a person skilled in the pertinent art to make and use the disclosure.

FIG. 1 is a schematic perspective view of a plate material pulverizing screen apparatus;

FIG. 2 is a schematic view of a first perspective cutaway perspective of a sheet material crushing screen apparatus;

FIG. 3 is a schematic view of a second perspective cutaway perspective of a sheet material crushing screen apparatus;

FIG. 4 is a schematic diagram of a three-dimensional enlarged structure of a vibration mechanism;

Fig. 5 is a schematic diagram of a three-dimensional enlarged structure of the screening mechanism.

[ Reference numerals ]

1. A case; 2. a feed frame; 3. a crushing mechanism; 4. a screening mechanism; 5. a driving motor; 6. a driving shaft; 7. a gear; 8. a crushing blade; 9. a funnel; 10. a vibration mechanism; 11. a hook; 12. a spring hook; 13. a movable door; 14. a support column; 15. a vibration motor; 16. a vibration plate; 17. a spring base; 18. a first discharge baffle; 19. a slide rail; 20. a protective shell; 21. a collar; 22. a first screening plate; 23. a second screening plate; 24. a solid plate; 25. a second discharge baffle; 26. and a third discharging baffle.

While particular structures and devices are shown in the drawings to enable a clear implementation of embodiments of the utility model, this is for illustrative purposes only and is not intended to limit the utility model to the particular structures, devices and environments, which may be modified or adapted by those of ordinary skill in the art, as desired, and which remain within the scope of the appended claims.

Detailed Description

The utility model provides a plate raw material crushing and screening device which is described in detail below with reference to the accompanying drawings and specific embodiments. While the utility model has been described herein in terms of the preferred and preferred embodiments, the following embodiments are intended to be more illustrative, and may be implemented in many alternative ways as will occur to those of skill in the art; and the accompanying drawings are only for the purpose of describing the embodiments more specifically and are not intended to limit the utility model specifically.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the relevant art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

Generally, the terminology may be understood, at least in part, from the use of context. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending at least in part on the context. In addition, the term "based on" may be understood as not necessarily intended to convey an exclusive set of factors, but may instead, depending at least in part on the context, allow for other factors that are not necessarily explicitly described.

It will be understood that the meanings of "on … …", "on … …" and "over … …" in this disclosure should be interpreted in the broadest sense so that "on … …" means not only "directly on" something but also includes the meaning of "on" something with intervening features or layers therebetween, and "on … …" or "over … …" means not only "on" or "over" something, but also may include its meaning of "on" or "over" something without intervening features or layers therebetween.

Furthermore, spatially relative terms such as "under …," "under …," "lower," "above …," "upper," and the like may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented and the spatially relative descriptors used herein may similarly be interpreted accordingly.

As shown in fig. 1 to 5, an embodiment of the present utility model provides a plate raw material pulverizing and screening apparatus, including a box 1 and a feeding frame 2, the feeding frame 2 is fixedly connected to the top of the box 1, a pulverizing mechanism 3 for pulverizing plates is installed in the box 1, a hopper 9 is fixedly connected to the inner wall of the box 1, a vibration mechanism 10 and a screening mechanism 4 are installed in the box 1, the vibration mechanism 10 and the screening mechanism 4 are located below the hopper 9, a first discharge baffle 18 and a third discharge baffle 26 penetrating and extending to the outside of the box 1 are fixedly connected to one side of the box 1, a second discharge baffle 25 penetrating and extending to the outside of the box 1 are fixedly connected to the opposite sides of the box 1, the screening mechanism 4 includes a first screening plate 22, a second screening plate 23 and a solid plate 24 which are sequentially rotatably connected, the first screening plate 22, the second screening plate 23 and the solid plate 24 are arranged in a zigzag manner, the first screening plate 22 is suspended in the box body 1 and positioned below the hopper 9, one end of the first screening plate 22, which is close to the second screening plate 23, is inclined downwards and extends to the upper part of the first discharging baffle 18 beyond the second screening plate 23, one end of the second screening plate 23, which is close to the solid plate 24, is inclined downwards and extends to the upper part of the second discharging baffle 25 beyond the solid plate 24, one end of the second discharging baffle 25, which is close to the third discharging baffle 26, is inclined downwards and extends to the upper part of the third discharging baffle 26, the first screening plate 22 and the second screening plate 23 are both fixedly connected with filter screens, the sizes of filter holes of the filter screens are gradually reduced from top to bottom, the vibration mechanism 10 comprises a spring base 17 fixedly connected to the inner wall of the bottom of the box body 1, a vibration motor 15 is fixedly connected to the spring base 17, a sliding rail 19 is fixedly connected to the inner wall of the box body 1, fixedly connected with vibrations board 16 on the vibrations motor 15, slide rail 19 and vibrations board 16 sliding connection, fixedly connected with a plurality of support columns 14 on the vibrations board 16, support column 14 contradicts with first screening board 22, second screening board 23 and entity board 24's bottom, funnel 9 is located the below of crushing mechanism 3, the equal fixedly connected with of both sides side of funnel 9 is a plurality of couple 11, the equal joint in bottom of couple 11 has spring couple 12, the both sides frame fixedly connected with a plurality of lantern ring 21 of first screening board 22, the bottom and the lantern ring 21 joint of spring couple 12.

Through arranging the screening mechanism 4 and the vibration mechanism 10, after the plate raw materials are crushed, the plate raw materials fall onto the first screening plate 22 through the hopper 9, the vibration mechanism 10 vibrates the first screening plate 22, the second screening plate 23 and the solid plate 24, so that the crushed plate raw materials are screened on the vibrating first screening plate 22, larger materials after screening can be left on the first screening plate 22 and move through an inclined angle and continuous vibration, fall onto the first discharging baffle 18 penetrating and extending out of the box body 1, leave the box body 1, finish preliminary screening, smaller materials after screening can fall under the first screening plate 22, further screening is performed through the second screening plate 23, larger materials after screening can be left on the second screening plate 23, through the angle of slope and continuous vibrations fall through and extend out on the second ejection of compact baffle 25 outside the box 1, make it leave in the box 1, accomplish further screening, less material can fall into on the entity board 24 of second screening board 23 below after the screening, all surplus materials that will be screened fall on the third ejection of compact baffle 26 through the angle of slope and continuous vibrations, make it leave in the box 1, accomplish all screening, the benefit of doing so is because first screening board 22, second screening board 23 and entity board 24 set up as an organic whole, only need a vibrating motor 15 just can influence whole screening mechanism 4, the reduction sets up too much motor and causes unnecessary energy waste, manufacturing cost has been practiced thrift.

Through setting up support column 14, contradict its bottom with first screening plate 22, second screening plate 23 and entity board 24, guaranteed first screening plate 22, second screening plate 23 and entity board 24's fixed position, also make when vibrating motor 15 vibrations, first screening plate 22, second screening plate 23 and entity board 24 also can follow its vibrations, auxiliary screening function's use, the effect of sieving has been strengthened, simultaneously support column 14 and first screening plate 22, second screening plate 23 and entity board 24's bottom contradict the mode also lets first screening plate 22, second screening plate 23 and entity board 24 more convenient with support column 14 separation, when maintaining equipment, only need take down lantern ring 21 from spring hanger 12, with first screening plate 22, second screening plate 23 and entity board 24 directly outwards take out can, normal maintenance has been made things convenient for.

Through setting up slide rail 19, when vibration motor 15 work vibrations, determined the direction that vibrations board 16 shakes, guaranteed that vibrations board 16 can not squint to other directions when vibrations, and then influence the normal use of screening function.

Through setting up spring hanger 12 and spring base 17, when vibration motor 15 work vibrations, can not too much influence other working parts in box 1, guarantee that the crushing and the screening of panel raw materials can normal operating.

As shown in fig. 1, fig. 2 and fig. 3, the crushing mechanism 3 comprises a driving motor 5 fixedly connected to one side of a box body 1, a driving shaft 6 is fixedly connected to the output end of the driving motor 5, the driving shaft 6 is rotationally sleeved with the box body 1, a driven shaft is rotationally sleeved with the box body 1, the driving shaft 6 and the driven shaft penetrate through the box body 1, gears 7 are fixedly sleeved at one ends, far away from the driving motor 5, of the driving shaft 6 and the driven shaft, a plurality of gears 7 are meshed with each other, crushing blades 8 are fixedly sleeved on the driving shaft 6 and the driven shaft, the crushing blades 8 are used for crushing materials entering the box body 1, a protective shell 20 is fixedly connected to the box body 1, the gears 7 are arranged inside the protective shell 20, and a movable door 13 is rotationally connected to the box body 1 and the protective shell 20.

Through setting up crushing mechanism 3, when needs smash panel raw materials, start driving motor 5, drive driving shaft 6, crushing blade 8 are rotatory, and then drive the crushing blade 8 on driven shaft and the driven shaft through intermeshing's gear 7 and rotate, put into box 1 with the panel raw materials through feeding frame 2 this moment, make the panel raw materials smashed by the crushing blade 8 of rotation on driving shaft 6 and the driven shaft, simple structure, convenient to use.

Through setting up protective housing 20, having protected gear 7, reduced the influence that external environment caused gear 7, through setting up dodge gate 13 for when maintaining equipment, only need open dodge gate 13, just can operate its inside, it is more convenient to let maintenance repair.

According to the technical scheme provided by the utility model, through arranging the screening mechanism 4 and the vibration mechanism 10, after the plate raw materials are crushed, the plate raw materials fall onto the first screening plate 22 through the hopper 9, the vibration of the vibration mechanism 10 drives the first screening plate 22, the second screening plate 23 and the entity plate 24 to vibrate, so that the crushed plate raw materials are screened on the first screening plate 22 in vibration, larger materials after screening can be left on the first screening plate 22 and move through an inclined angle and continuous vibration, fall on the first discharging baffle 18 penetrating and extending out of the box body 1, so that the plate raw materials leave the box body 1, preliminary screening is completed, smaller materials after screening can fall into the lower part of the first screening plate 22, further screening is performed through the second screening plate 23, the larger materials after screening can also be left on the second screening plate 23, the larger materials fall onto the second discharging baffle 25 penetrating and extending out of the box body 1 through the inclined angle, further screening is completed, the larger materials after screening can fall into the second screening plate 23 and the entity plate 24 through the inclined angle and the second screening plate 24, the whole motor is not required to be reduced, and the whole screening cost is saved, and the whole motor is reduced, and the whole cost is saved because the motor is required to be reduced, and the whole screening cost is reduced, and the whole is reduced due to the fact that the whole material can fall into the second screening plate 24 and the second screening plate is required to be arranged on the second screening plate 24.

Through setting up support column 14, contradict its bottom with first screening plate 22, second screening plate 23 and entity board 24, guaranteed first screening plate 22, second screening plate 23 and entity board 24's fixed position, also make when vibrating motor 15 vibrations, first screening plate 22, second screening plate 23 and entity board 24 also can follow its vibrations, auxiliary screening function's use, the effect of sieving has been strengthened, simultaneously support column 14 and first screening plate 22, second screening plate 23 and entity board 24's bottom contradict the mode also lets first screening plate 22, second screening plate 23 and entity board 24 more convenient with support column 14 separation, when maintaining equipment, only need take down lantern ring 21 from spring hanger 12, with first screening plate 22, second screening plate 23 and entity board 24 directly outwards take out can, normal maintenance has been made things convenient for.

Through setting up slide rail 19, when vibration motor 15 work vibrations, determined the direction that vibrations board 16 shakes, guaranteed that vibrations board 16 can not squint to other directions when vibrations, and then influence the normal use of screening function.

Through setting up spring hanger 12 and spring base 17, when vibration motor 15 work vibrations, can not too much influence other working parts in box 1, guarantee that the crushing and the screening of panel raw materials can normal operating.

Through setting up crushing mechanism 3, when needs smash panel raw materials, start driving motor 5, drive driving shaft 6, crushing blade 8 are rotatory, and then drive the crushing blade 8 on driven shaft and the driven shaft through intermeshing's gear 7 and rotate, put into box 1 with the panel raw materials through feeding frame 2 this moment, make the panel raw materials smashed by the crushing blade 8 of rotation on driving shaft 6 and the driven shaft, simple structure, convenient to use.

Through setting up protective housing 20, having protected gear 7, reduced the influence that external environment caused gear 7, through setting up dodge gate 13 for when maintaining equipment, only need open dodge gate 13, just can operate its inside, it is more convenient to let maintenance repair.

The utility model is intended to cover any alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the utility model. In the above description of the preferred embodiments of the utility model, specific details are set forth in order to provide a thorough understanding of the utility model, and the utility model will fully be understood to those skilled in the art without such details. In other instances, well-known methods, procedures, flows, components, circuits, and the like have not been described in detail so as not to unnecessarily obscure aspects of the present utility model.

Those of ordinary skill in the art will appreciate that all or a portion of the steps in implementing the methods of the embodiments described above may be implemented by a program that instructs associated hardware, and the program may be stored on a computer readable storage medium, such as: ROM/RAM, magnetic disks, optical disks, etc.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims (6)

1. The utility model provides a board raw materials crushing screen device which characterized in that includes: the novel box comprises a box body (1) and a feeding frame (2), wherein the feeding frame (2) is fixedly connected to the top of the box body (1), a crushing mechanism (3) for crushing plates is arranged in the box body (1), a hopper (9) is fixedly connected to the inner wall of the box body (1), a vibrating mechanism (10) and a screening mechanism (4) are arranged in the box body (1), the vibrating mechanism (10) and the screening mechanism (4) are located below the hopper (9), a first discharging baffle (18) and a third discharging baffle (26) which penetrate through and extend out of the box body (1) are fixedly connected to one side of the box body (1), and a second discharging baffle (25) which penetrates through and extends out of the box body (1) is fixedly connected to the opposite side of the first discharging baffle (18) and the third discharging baffle (26);

Screening mechanism (4) are including first screening board (22), second screening board (23) and entity board (24) that rotate in proper order and connect, first screening board (22) second screening board (23) with entity board (24) are Z shape setting of arranging, first screening board (22) suspension is in box (1) and are located hopper (9) below, first screening board (22) are close to second screening board (23) one end slope downwards and cross second screening board (23) extend to first discharging baffle (18) top, second screening board (23) are close to entity board (24) one end slope downwards and cross entity board (24) extend to second discharging baffle (25) top, second discharging baffle (25) are close to third discharging baffle (26) one end slope downwards and extend to third discharging baffle (26) top, first screening board (22) and second screening board (23) are connected to the filter screen by many big or small, filtration pore size is little.

2. The plate raw material crushing and screening device according to claim 1, wherein the crushing mechanism (3) comprises a driving motor (5) fixedly connected to one side of the box body (1), an output end of the driving motor (5) is fixedly connected with a driving shaft (6), the driving shaft (6) is rotatably sleeved with the box body (1), a driven shaft is rotatably sleeved with the box body (1), the driving shaft (6) and the driven shaft penetrate through the box body (1), gears (7) are fixedly sleeved at one ends, far away from the driving motor (5), of the driving shaft (6) and the driven shaft, a plurality of gears (7) are meshed with each other, crushing blades (8) are fixedly sleeved on the driving shaft (6) and the driven shaft, and the crushing blades (8) are used for crushing materials entering the box body (1).

3. The plate raw material crushing and screening device according to claim 1, wherein the vibration mechanism (10) comprises a spring base (17) fixedly connected to the inner wall of the bottom of the box body (1), a vibration motor (15) is fixedly connected to the spring base (17), a sliding rail (19) is fixedly connected to the inner wall of the box body (1), a vibration plate (16) is fixedly connected to the vibration motor (15), the sliding rail (19) is in sliding connection with the vibration plate (16), a plurality of supporting columns (14) are fixedly connected to the vibration plate (16), and the supporting columns (14) are in contact with the bottoms of the first screening plate (22), the second screening plate (23) and the entity plate (24).

4. The plate raw material crushing and screening device according to claim 1, wherein the funnel (9) is located below the crushing mechanism (3), two side surfaces of the funnel (9) are fixedly connected with a plurality of hooks (11), spring hooks (12) are clamped at the bottoms of the hooks (11), a plurality of lantern rings (21) are fixedly connected to two side frames of the first screening plate (22), and the bottoms of the spring hooks (12) are clamped with the lantern rings (21).

5. The plate raw material crushing and screening device according to claim 2, wherein a protecting shell (20) is fixedly connected to the box body (1), and the gear (7) is arranged inside the protecting shell (20).

6. The plate material crushing and screening device according to claim 5, wherein the box body (1) and the protecting shell (20) are both rotatably connected with a movable door (13).