Incubator front and rear frame structure with extension structure

Abstract

The utility model discloses an incubator front and back frame structure with an extension structure, which comprises fixing plates, transverse plates are arranged on the sides, close to each other, of the fixing plates at equal intervals, the two ends of each transverse plate are fixedly connected with the fixing plates through fixing seats, and limiting grooves are formed in the sides, close to each other, of the bottoms of the transverse plates. A first incubation frame is arranged on the sides, close to each other, of the transverse plates, a second incubation frame is arranged on one side of the first incubation frame, limiting strips are arranged on the two sides of the bottom of the first incubation frame and the two sides of the bottom of the second incubation frame, and the limiting strips are connected with the limiting grooves in a matched mode. The utility model relates to the technical field of hatching devices, and solves the problems that in the prior art, a hatching frame of a hatching device is fixedly installed inside a box body of a hatching device, when hatched eggs are placed on a hatching basket located on the inner side of the box body or hatched chicks are taken out, great inconvenience exists, the hatching number of the hatching eggs is greatly limited, and the hatched chicks cannot be taken out easily. The hatching efficiency of the hatching eggs is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of egg incubators, in particular to a front and rear frame structure of an egg incubator with an extension structure. Background Art

[0002] An egg incubator refers to a machine that artificially simulates the maternal nature of oviparous animals to develop fertilized eggs into life through conditions such as temperature, humidity, and egg turning over over a certain period of time. It is mainly used for hatching eggs, embryo development, breeding farms, hatcheries, hatcheries, chicken farms, personal hatching, family hatching, unit hatching, school hatching, biological hatching, embryo hatching, etc. In the prior art, the hatching rack of the egg incubator is fixedly installed inside the incubator box. When placing hatching eggs on the hatching basket located on the inner side of the box or taking out the hatched chicks, there is great inconvenience, which greatly limits the number of hatching eggs and affects the hatching efficiency of the eggs. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model provides a front and rear frame structure of an incubator with an extension structure, which solves the problem in the prior art that the hatching frame of the incubator is fixedly installed inside the incubator box, which causes great inconvenience when placing hatching eggs on the hatching basket located on the inner side of the box or taking out the hatched chicks, thereby greatly limiting the number of hatched eggs and affecting the hatching efficiency of the hatching eggs.

[0004] To achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions: a front and rear frame structure of an incubator with an extension structure, comprising a fixed plate, a cross plate is equidistantly arranged on one side of the fixed plates close to each other, both ends of the cross plate are fixedly connected to the fixed plate through a fixing seat, a limiting groove is arranged on one side of the bottom of the cross plate close to each other, a first hatching frame is arranged on one side of the cross plate close to each other, a second hatching frame is arranged on one side of the first hatching frame, limiting strips are arranged on both sides of the bottom of the first hatching frame and the second hatching frame, the limiting strips are cooperated with the limiting grooves, a first slide groove is provided at the bottom of one side of the cross plates close to each other, a second slide groove is provided above the first hatching frame on one side of the cross plates close to each other, an inclined slide groove is connected at one end of the first slide groove and the second slide groove close to each other, rollers are rotatably connected at both sides of the second hatching frame, the rollers are respectively cooperated with the first slide groove, the inclined slide groove and the second slide groove, and hatching baskets are equidistantly arranged inside the first hatching frame and the second hatching frame.

[0005] Preferably, the bottom of the inner wall of the first hatching rack and the second hatching rack are both provided with a limiting edge, the inner walls of the first hatching rack and the second hatching rack are both cooperatively connected with a hatching tray, the hatching tray is cooperatively connected to the limiting edge, and the top of the hatching tray is equidistantly provided with limiting holes, and the limiting holes are cooperatively connected to the hatching basket.

[0006] Preferably, one end of the first chute away from the inclined chute is connected with a chute plug, the chute plug is fixedly connected to the cross plate, one end of the cross plate away from the chute plug is provided with a baffle, the baffle is respectively connected with the first hatching rack and the second hatching rack.

[0007] Preferably, a limiting protrusion is provided at the bottom of one side of the second slide groove close to the inclined slide groove, and the limiting protrusion is cooperatively connected with the roller.

[0008] Preferably, a handle is provided on a side of the outer wall of the second incubation rack away from the baffle.

[0009] The utility model provides a front and rear frame structure of an egg incubator with an extension structure. The utility model has the following beneficial effects: the front and rear frame structure of the egg incubator with an extension structure forms a multi-layer front and rear frame structure inside the egg incubator through the cooperation among a fixed plate, a fixed seat, a horizontal plate, a limiting groove, a first hatching frame, a second hatching frame, a limiting strip, a first slide, an inclined slide, a second slide, a roller and a hatching basket, and the second hatching frame can be moved in the egg incubator through the limited rotation of the roller in the first slide, the inclined slide and the second slide, and the hatching frames are stacked or extended, so that it is convenient for the staff to pull the first hatching frame out from the inside of the egg incubator, which can improve the convenience of placing hatching eggs or taking out hatching chicks inside the incubator, and can enable the egg incubator to have a greater depth for hatching eggs, thereby increasing the number of hatching eggs, so that the convenience of using the incubator can be improved, and the hatching efficiency of the hatching eggs can be improved.

[0010] Through the cooperation among the first hatching frame, the second hatching frame, the hatching basket, the limiting edge, the hatching tray and the limiting hole, the hatching tray and the hatching basket are stably fixed inside the first hatching frame and the second hatching frame, and at the same time, the convenience of separating the hatching tray from the first hatching frame and the second hatching frame is improved, and it is convenient to take out or replace the hatching tray with different specifications, so as to improve the application range and use convenience of the incubator. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the appearance of the utility model;

[0012] Figure 2 for Figure 1 Schematic diagram of the appearance of the middle horizontal plate, the first hatching rack and the second hatching rack;

[0013] Figure 3 for Figure 1 Schematic diagram of the appearance of the first chute, the second chute and the hatching tray;

[0014] Figure 4 for Figure 1 A partial enlarged view of the middle A area;

[0015] Figure 5 for Figure 2 A partial enlarged view of the middle B area;

[0016] Figure 6 for Figure 3 A partial enlarged view of the middle C area.

[0017] In the figure: 1, fixed plate, 2, fixed seat, 3, horizontal plate, 4, limiting groove, 5, first hatching rack, 6, second hatching rack, 7, limiting bar, 8, first slide, 9, inclined slide, 10, second slide, 11, roller, 12, hatching basket, 13, limiting edge, 14, hatching tray, 15, limiting hole, 16, slide plug, 17, baffle, 18, limiting protrusion, 19, handle. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the prior art, the hatching rack of the incubator is fixedly installed inside the incubator box. When placing hatching eggs on the hatching basket located inside the box or taking out the hatching chicks, there is great inconvenience, which greatly limits the number of hatching eggs and affects the hatching efficiency of the eggs.

[0020] In view of this, the utility model provides a front and rear frame structure of an incubator with an extension structure, through the cooperation between a fixed plate, a fixed seat, a cross plate, a limiting groove, a first incubation frame, a second incubation frame, a limiting strip, a first slide, an inclined slide, a second slide, a roller and a hatching basket, a multi-layer front and rear frame structure is formed inside the incubator, and the second incubation frame can be moved in the incubator through the limited rotation of the roller in the first slide, the inclined slide and the second slide, and the incubation frames are stacked or extended, which is convenient for the staff to pull the first incubation frame out from the inside of the incubator, improves the convenience of placing hatching eggs or taking out hatching chicks inside the box, and enables the incubator to have a greater depth for incubating eggs, thereby increasing the number of hatched eggs and improving the hatching efficiency of the hatching eggs.

[0021] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principles and processes, and no longer explains the electrical control.

[0022] Depend on Figure 1-6 It can be seen that a front and rear frame structure of an incubator with an extension structure includes a fixed plate 1, and the sides of the fixed plates 1 that are far away from each other are fixed to the inner wall of the incubator, and the sides of the fixed plates 1 that are close to each other are equidistantly provided with cross plates 3, and the cross plates 3 are used to support the first incubation frame 5 and the second incubation frame 6 on both sides, so that a multi-layer incubation frame structure is formed inside the incubator, and the number and spacing of the cross plates 3 are set according to actual usage conditions, and both ends of the cross plates 3 are fixedly connected to the fixed plate 1 through a fixing seat 2, and a limiting groove 4 is set on the side of the bottom of the cross plates 3 that is close to each other, and a first incubation frame 5 is set on the side of the cross plates 3 that is close to each other, and the first incubation frame 5 is set on the inner side of the incubator, and a second incubation frame 6 is set on one side of the first incubation frame 5, and the second incubation frame 6 is set on the incubator. On the outer side of the egg device, both sides of the bottom of the first hatching frame 5 and the second hatching frame 6 are provided with limit strips 7, and the limit strips 7 are connected with the limit grooves 4. A first slide groove 8 is provided at the bottom of the side where the cross plates 3 are close to each other, and a second slide groove 10 is provided above the first hatching frame 5 on the side where the cross plates 3 are close to each other. An inclined slide groove 9 is connected at one end where the first slide groove 8 and the second slide groove 10 are close to each other. Both sides of the second hatching frame 6 are rotatably connected with rollers 11, and the rollers 11 are respectively connected with the first slide groove 8, the inclined slide groove 9 and the second slide groove 10. The first hatching frame 5 and the second hatching frame 6 are equidistantly provided with hatching baskets 12 inside. The inside of the hatching baskets 12 is used to place hatching eggs, and can be taken out from the first hatching frame 5 and the second hatching frame 6;

[0023] In the specific implementation process, it is worth pointing out that the side of the fixed plate 1 that is away from each other is fixed to the inner wall of the incubator, and the cross plate 3 is used to support the first hatching frame 5 and the second hatching frame 6 on both sides, so that a multi-layer hatching frame structure is formed inside the incubator, the first hatching frame 5 is arranged on the inner side of the incubator, and the second hatching frame 6 is arranged on the outer side of the incubator. The number and spacing of the cross plates 3 are set according to actual usage conditions, and the fixation between the cross plate 3 and the fixed frame 1 is achieved through the cooperation between the fixed frame 1, the fixed seat 2 and the cross plate 3. Through the cooperation between the cross plate 3, the limiting groove 4, the first hatching frame 5, the second hatching frame 6 and the limiting strip 7, the limiting strip 7 is limited in the limiting groove 4, so that the first hatching frame 5 and the second hatching frame 6 are fixed. The first hatching rack 5 and the second hatching rack 6 are stably limited and supported between the transverse plate 3. At the same time, by pushing and pulling the first hatching rack 5 and the second hatching rack 6, the first hatching rack 5 and the second hatching rack 6 can be stably moved horizontally on the transverse plate 3, and a multi-layer front and rear rack structure is formed inside the incubator. Through the cooperation among the transverse plate 3, the first slide groove 8, the inclined slide groove 9 and the second slide groove 10, the first slide groove 8 is opened at the bottom of the side of the transverse plate 3 away from the inside of the incubator, and the second slide groove 10 is opened at the top of the side of the transverse plate 3 close to the inside of the incubator. The first slide groove 8 is connected with the second slide groove 10 through the inclined slide groove 9. The cooperation between 10 and the roller 11 is that the roller 11 is limitedly rotated in the first slide groove 8, the inclined slide groove 9 and the second slide groove 10, so that when the second hatching rack 6 is away from the inside of the incubator, the roller 11 is limitedly supported in the first slide groove 8, so that the second hatching rack 6 and the first hatching rack 5 are at the same horizontal height, and a front and rear rack structure is formed inside the incubator. When the second hatching rack 6 moves into the incubator, the roller 11 moves from the first slide groove 8 to the second slide groove 10 via the inclined slide groove 9, so that the second hatching rack 6 and the first hatching rack 5 are stacked at the same horizontal position. The inside of the hatching basket 12 is used to place hatching eggs, and can be taken out from the first hatching rack 5 and the second hatching rack 6. , a fixing seat 2, a horizontal plate 3, a limiting groove 4, a first hatching rack 5, a second hatching rack 6, a limiting strip 7, a first slide 8, an inclined slide 9, a second slide 10, a roller 11 and a hatching basket 12 cooperate to form a multi-layer front and rear frame structure inside the incubator, and the roller 11 is limited and rotated in the first slide 8, the inclined slide 9 and the second slide 10, so that the second hatching rack 6 can be moved in the incubator, and the hatching racks are stacked or extended, so that the staff can pull the first hatching rack 5 out from the inside of the incubator, improve the convenience of placing hatching eggs or taking out hatching chicks inside the box, so that the incubator can have a greater depth for hatching eggs, thereby increasing the number of hatched eggs and improving the hatching efficiency of the hatching eggs;

[0024] Further, the bottom of the inner wall of the first hatching frame 5 and the second hatching frame 6 are both provided with a limiting edge 13, and the inner walls of the first hatching frame 5 and the second hatching frame 6 are both connected with a hatching tray 14 in cooperation, and the size and number of the limiting holes 15 of the hatching tray 14 and the hatching basket 12 can be set according to the type of hatching eggs. By using hatching trays 14 and hatching baskets 12 of different specifications, the incubator can hatch different types of hatching eggs, the hatching tray 14 is connected with the limiting edge 13, and the top of the hatching tray 14 is equidistantly provided with limiting holes 15, and the limiting holes 15 are connected with the hatching basket 12 in cooperation;

[0025] In the specific implementation process, it is worth pointing out that, through the cooperation among the first hatching frame 5, the second hatching frame 6, the limiting edge 13 and the hatching tray 14, the hatching tray 14 can be fixed by the limiting edge 13 inside the first hatching frame 5 and the second hatching frame 6, and the hatching tray 14 can be taken out from the top of the first hatching frame 5 and the second hatching frame 6, so as to improve the convenience of replacing or cleaning and disinfecting the hatching tray 14. Through the cooperation among the hatching tray 14, the limiting hole 15 and the hatching basket 12, the size and quantity of the limiting hole 15 of the hatching tray 14 and the hatching basket 12 can be set according to the type of hatching eggs. By using hatching trays 14 and hatching baskets 12 of different specifications, the incubator can Different kinds of hatching eggs are hatched, and the application scope of the incubator is improved. The hatching basket 12 is placed in the limiting hole 15 for limiting, and the hatching eggs are placed in the hatching basket 12, so that the hatching eggs are stably fixed in the hatching tray 14. Through the cooperation among the first hatching frame 5, the second hatching frame 6, the hatching basket 12, the limiting edge 13, the hatching tray 14 and the limiting hole 15, the hatching tray 14 and the hatching basket 12 are stably fixed in the first hatching frame 5 and the second hatching frame 6. At the same time, the convenience of separating the hatching tray 14 from the first hatching frame 5 and the second hatching frame 6 is improved, so that the hatching tray 14 can be taken out or replaced with different specifications, thereby improving the application scope and convenience of use of the incubator.

[0026] Further, one end of the first chute 8 away from the inclined chute 9 is connected with a chute plug 16, which is used to limit the stroke of the roller 11 at the end of the first chute 8 away from the inclined chute 9, and can be disassembled and separated from the cross plate 3, so as to improve the convenience of installation and disassembly of the second hatching rack 6. The chute plug 16 is fixedly connected to the cross plate 3, and a baffle 17 is provided at one end of the cross plate 3 away from the chute plug 16. The baffle 17 is used to limit the first hatching rack 5 and the second hatching rack 6, and the baffle 17 is respectively connected with the first hatching rack 5 and the second hatching rack 6;

[0027] In the specific implementation process, it is worth pointing out that the chute plug 16 is used to limit the stroke of the roller 11 at the end of the first chute 8 away from the inclined chute 9, and can be disassembled and separated from the cross plate 3 to improve the convenience of installation and disassembly of the second hatching rack 6. The baffle 17 is used to limit the first hatching rack 5 and the second hatching rack 6;

[0028] Furthermore, a limiting protrusion 18 is provided at the bottom of one side of the second slide groove 10 close to the inclined slide groove 9, and the limiting protrusion 18 is cooperatively connected with the roller 11;

[0029] In the specific implementation process, it is worth pointing out that, through the cooperation between the second hatching frame 6, the second chute 10, the roller 11 and the limiting protrusion 18, when the second hatching frame 6 moves to the inner side of the egg incubator, the limiting protrusion 18 limits the roller 11, thereby improving the stability of the second hatching frame 6 inside the egg incubator;

[0030] Furthermore, a handle 19 is provided on the side of the outer wall of the second hatching rack 6 away from the baffle 17, and the handle 19 is used to provide a fulcrum when pushing and pulling the second hatching rack 6, thereby improving the convenience of pushing and pulling the second hatching rack 6;

[0031] In the specific implementation process, it is worth pointing out that the handle 19 is used to provide a fulcrum when pushing and pulling the second incubation rack 6, thereby improving the convenience of pushing and pulling the second incubation rack 6;

[0032] Specifically, when the front and rear frame structure of the incubator with the extension structure is used, the second incubation frame 6 is pushed inward from the outer side of the incubator, and the second incubation frame 6 is moved from the outer side of the incubator to the top of the first incubation frame 5 through the guidance and limitation of the roller 11 by the first slide 8, the inclined slide 9 and the second slide 10, and the first incubation frame 5 is pulled out from the bottom of the second incubation frame 6, and the corresponding incubation tray 14 and hatching basket 12 are selected according to the type of incubated eggs, and the incubation tray 14 is placed in the interior of the first incubation frame 5, and the limiting edge 13 forms a support for the incubation tray 14, and the hatching basket 12 is placed in the limiting hole 15 of the incubation tray 14, and the incubation eggs are placed in the interior of the hatching basket 12, and the incubation is completed. The first hatching rack 5 is placed, the first hatching rack 5 is pushed back to the bottom of the second hatching rack 6, the second hatching rack 6 is pulled outward, the second hatching rack 6 is moved from the top of the first hatching rack 5 to the outside of the incubator, the hatching tray 14 and the hatching basket 12 are placed in the second hatching rack 6, the hatching eggs are placed in the hatching basket 12 of the second hatching rack 6, and the placement of the eggs on the second hatching rack 6 is completed. Repeat the above steps to place the hatching eggs on the hatching racks of other layers from bottom to top. After the hatching eggs are placed on the hatching racks, the hatching eggs can be started. After the hatching of the eggs is completed, the hatching chicks in the second hatching rack 6 are taken out one by one, and then the hatching baskets 12 and the hatching baskets are placed. The hatching tray 14 can be taken out, and the hatched chicks together with the hatching tray 14 and the hatching basket 12 can be taken out as a whole. After the hatching tray 14 and the hatching basket 12 are taken out from the second hatching rack 6, the second hatching rack 6 is pushed and moved to the top of the first hatching rack 5, and the first hatching rack 5 is pulled out from the inner side of the incubator to take out the hatched chicks in the first hatching rack 5, and the hatching tray 14 and the hatching basket 12 are taken out from the first hatching rack 5, and the first hatching rack 5 is pushed back to the inner side of the incubator to complete the taking out of the hatched chicks in the first hatching rack 5 and the second hatching rack 6, and the above steps are repeated to take out the hatched chicks from the hatching racks of other layers from top to bottom, and the hatching racks of other layers are taken out by the fixing plate 1, the fixing seat 2, and the cross plate. 3, the limiting groove 4, the first hatching rack 5, the second hatching rack 6, the limiting strip 7, the first slide 8, the inclined slide 9, the second slide 10, the roller 11 and the hatching basket 12 cooperate to form a multi-layer front and rear frame structure inside the incubator, and the roller 11 is limited and rotated in the first slide 8, the inclined slide 9 and the second slide 10, so that the second hatching rack 6 can be moved in the incubator, and the hatching racks are stacked or extended, which is convenient for the staff to pull the first hatching rack 5 out from the inside of the incubator, improve the convenience of placing hatching eggs or taking out hatching chicks inside the box, so that the incubator can have a greater depth for incubating eggs, thereby increasing the number of hatching eggs and improving the hatching efficiency of the hatching eggs.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0034] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A front and rear frame structure of an egg incubator with an extension structure, comprising a fixing plate (1), characterized in that: A transverse plate (3) is equidistantly arranged on one side of the fixed plates (1) close to each other, and both ends of the transverse plate (3) are fixedly connected to the fixed plates (1) through a fixing seat (2). A limiting groove (4) is arranged on one side of the bottom of the transverse plate (3) close to each other, and a first hatching frame (5) is arranged on one side of the transverse plate (3) close to each other. A second hatching frame (6) is arranged on one side of the first hatching frame (5). Limiting strips (7) are arranged on both sides of the bottom of the first hatching frame (5) and the second hatching frame (6), and the limiting strips (7) are connected to the limiting grooves (4). The transverse plate (3) is provided with a plurality of spacers, and the spacers are provided with a plurality of spacers. ) are provided with a first slide groove (8) at the bottom of the side where the two hatches are close to each other, a second slide groove (10) is provided at the side where the two hatches are close to each other and is located above the first hatching frame (5), an inclined slide groove (9) is connected to one end of the first slide groove (8) and the second slide groove (10) where the two hatches are close to each other, and rollers (11) are rotatably connected to both sides of the second hatching frame (6), and the rollers (11) are respectively connected to the first slide groove (8), the inclined slide groove (9) and the second slide groove (10), and hatching baskets (12) are equidistantly arranged inside the first hatching frame (5) and the second hatching frame (6).

2. The front and rear frame structure of an egg incubator with an extension structure according to claim 1, characterized in that: The bottom of the inner wall of the first hatching frame (5) and the bottom of the inner wall of the second hatching frame (6) are both provided with a limiting edge (13); the inner walls of the first hatching frame (5) and the second hatching frame (6) are both connected with a hatching tray (14); the hatching tray (14) is connected with the limiting edge (13); the top of the hatching tray (14) is provided with limiting holes (15) at equal intervals; the limiting holes (15) are connected with the hatching basket (12).

3. The front and rear frame structure of an egg incubator with an extension structure according to claim 1, characterized in that: The end of the first slide groove (8) away from the inclined slide groove (9) is connected with a slide groove plug (16), and the slide groove plug (16) is fixedly connected to the horizontal plate (3). The end of the horizontal plate (3) away from the slide groove plug (16) is provided with a baffle (17), and the baffle (17) is respectively connected with the first hatching frame (5) and the second hatching frame (6).

4. The front and rear frame structure of an egg incubator with an extension structure according to claim 1, characterized in that: A limiting protrusion (18) is provided at the bottom of one side of the second slide groove (10) close to the inclined slide groove (9), and the limiting protrusion (18) is cooperatively connected with the roller (11).

5. The front and rear frame structure of an egg incubator with an extension structure according to claim 3, characterized in that: A handle (19) is provided on a side of the outer wall of the second hatching frame (6) away from the baffle (17).

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