Mechanical uncovering water stop valve structure

Abstract

The utility model relates to the technical field of coffee machines, in particular to a mechanical uncovering water stop valve structure. Comprising an upper cover, the upper cover rotatably covers a machine body, a valve assembly is arranged on the upper cover, a water inlet pipe, an upper cavity, a lower cavity and a water outlet pipe which are communicated in sequence are arranged on the valve assembly, the upper cavity and the lower cavity are arranged in an up-down pairing mode, a cut-off assembly is arranged between the upper cavity and the lower cavity, and a trigger piece is arranged at the lower end of the valve assembly. The trigger piece protrudes out of the bottom face of the upper cover so as to be matched with the machine body, and the trigger piece is connected with the cut-off assembly in a matched mode. According to the mechanical uncovering water stop valve structure, when the upper cover is turned over from the machine body, the trigger piece is far away from the machine body, the trigger piece releases the cut-off assembly to rapidly cut off the water supply channel, pressure in the water inlet pipe and the upper cavity is applied to the cut-off assembly at the moment, the sealing performance of the cut-off assembly is improved, the overall structure is compact, and the cost is low. The stability is good, and the safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee machines, in particular to a mechanical open - cover water - stop valve structure. Background Art

[0002] A capsule coffee machine has a coffee box for placing coffee capsules. There are puncturing devices at both ends of the coffee box to puncture the coffee capsules. Then, high - pressure water with a certain temperature is introduced into the coffee capsules to achieve coffee extraction. Usually, the capsule coffee machine provides hot water to the coffee capsules by jointly connecting the water inlet pipeline through the upper cover and the lower cover. When it is necessary to take out the coffee capsules, the upper cover needs to be opened.

[0003] The cover structure and capsule coffee machine disclosed in Chinese Patent CN213309100U include an upper cover and a lower cover that can be mutually covered; the lower cover includes a water passing groove, a water - stop valve, and a sealing member made of a flexible material. The water inlet hole of the water passing groove is connected to the water inlet pipeline. The sealing member covers the opening of the water passing groove. There is a water passing hole on the sealing member. The water passing groove is communicated with the water inlet of the upper cover through the water passing hole. The water - stop valve is received in the water passing groove and is located between the sealing member and the water inlet hole; there is a push rod at the water inlet of the upper cover. When the upper cover and the lower cover are in the closed state, the push rod abuts against the water - stop valve, so that the water - stop valve is separated from the sealing member to open the water passing hole; when the upper cover and the lower cover are in the open state, the push rod leaves the water - stop valve, so that the water - stop valve is in cooperation with the sealing member under the water pressure of the water inlet pipeline to block the water passing hole.

[0004] In the above - mentioned prior art, by rotating the upper cover to drive the push rod to change the state of the water - stop valve, the requirements for the action coordination and processing accuracy between the upper cover and the push rod are relatively high. After using for a certain period of time, it is easy to have a water leakage phenomenon. Especially when the internal pressure is too high, there is a risk of the water - stop valve failure, and the stability is insufficient.

[0005] Therefore, the prior art still needs to be improved and developed. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a mechanical open - cover water - stop valve structure with reasonable structure, stable and reliable performance in view of the defects and deficiencies of the prior art.

[0007] In order to achieve the above - mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0008] A mechanical open - lid water - stop valve structure according to the present utility model includes an upper cover. The upper cover is rotatably covered on the body. A valve assembly is provided on the upper cover. The valve assembly is provided with a water inlet pipe, an upper chamber, a lower chamber, and a water outlet pipe that are connected in sequence. The upper chamber and the lower chamber are arranged in an up - and - down pair. A cut - off assembly is provided between the upper chamber and the lower chamber. A trigger member is provided at the lower end of the valve assembly. The trigger member protrudes from the bottom surface of the upper cover and is paired with the body. The trigger member is cooperatively connected with the cut - off assembly. The valve assembly is a node on the water supply path of the body. After the upper cover is covered with the body, the trigger member touches the body to make the cut - off assembly in an open state, and the water supply path of the body is conducted. When the upper cover is flipped from the body, the trigger member moves away from the body, and the trigger member releases the cut - off assembly to quickly cut off the water supply path. At this time, the pressure in the water inlet pipe and the upper chamber acts on the cut - off assembly, improving the sealing performance of the cut - off assembly. The overall structure is compact, with good stability and high safety.

[0009] According to the above solution, a transverse partition is provided between the upper chamber and the lower chamber. A valve orifice is provided on the transverse partition. The cut - off assembly includes a valve core and a butterfly valve. The valve core is movably inserted up and down through the valve orifice. The butterfly valve is arranged in the upper chamber, and the upper end of the valve core is fixedly connected to the butterfly valve. The transverse partition makes the upper chamber and the lower chamber arranged in an up - and - down pair. When the trigger member is touched, the valve core moves upward to make the butterfly valve away from the valve orifice. At this time, the upper chamber and the lower chamber are in a connected state. On the contrary, when the trigger member is released, the valve core moves downward to make the butterfly valve close the valve orifice, thus disconnecting between the upper chamber and the lower chamber.

[0010] According to the above solution, the lower end of the valve assembly is open - ended. The trigger member includes a sealing sleeve. The sealing sleeve is fixedly arranged on the lower port of the valve assembly. A lower chamber is formed between the sealing sleeve and the transverse partition. The lower end of the valve core touches and connects the sealing sleeve. The sealing sleeve is fixed on the lower port of the valve assembly, so that the lower end of the valve core touches the inner wall of the sealing sleeve, and a connection is formed between the two. Specifically, the sealing sleeve is made of an elastic material and can deform. At the same time, the elastic sealing sleeve has better sealing performance. Further, the sealing sleeve protrudes from the bottom surface of the upper cover. When the upper cover cooperates with the body, the sealing sleeve is compressed / released, driving the valve core to move upward / downward, thereby changing the on - off state between the upper chamber and the lower chamber.

[0011] According to the above solution, a spring is sleeved on the valve core. A baffle is provided at the lower end of the valve core. The upper end of the spring touches the transverse partition, and the lower end of the spring touches the baffle. The spring applies a downward force to the valve core, giving the butterfly valve a potential energy to tend to the valve orifice. When the sealing sleeve is released, the spring drives the valve core to quickly move downward to make the butterfly valve block the valve orifice. At this time, the pressure in the water inlet pipe and the upper chamber is greater than the pressure in the lower chamber and the water outlet pipe, further promoting the butterfly valve to better fit and close the valve orifice, improving the open - circuit stability of the valve assembly, and preventing safety risks caused by hot water splashing.

[0012] According to the above solution, the valve assembly includes a valve seat and a valve cover. A transverse partition is fixedly arranged in the valve seat, the valve cover is fixedly arranged at the upper end of the valve seat, and an upper chamber is arranged between the valve cover and the transverse partition. The lower end of the valve seat is open, a sealing sleeve is fixedly connected to the lower port of the valve seat, and a lower chamber is arranged between the sealing sleeve and the transverse partition. Preferably, the valve seat and the valve cover are separately arranged. The valve cover and the transverse partition cooperate to form the upper chamber, and the transverse partition and the sealing sleeve cooperate to form the lower chamber. The independent arrangement of the valve seat facilitates the assembly of the cutoff assembly. Specifically, after the valve core is sleeved with a spring, it is inserted into the lower port of the valve seat. The upper end of the valve core passes through the valve port and then the butterfly valve is fixed to the upper end of the valve core. Then, the valve cover and the sealing sleeve are respectively encapsulated at the upper and lower ends of the valve seat to form the valve assembly. The overall structure is simple and compact, easy to install, and has a lower production cost.

[0013] According to the above solution, a hemming sleeve is provided on the sealing sleeve, an installation seat is provided on the bottom surface of the upper cover, and a hose clamp is provided at the lower end of the installation seat. The valve seat is inserted into the installation seat, and the hemming sleeve is clamped between the hose clamp and the valve seat to fixedly connect the sealing sleeve and the valve seat. Moreover, the lower end of the sealing sleeve protrudes from the hose clamp to be paired with the machine body. The installation seat directly protrudes from the bottom surface of the upper cover to form a slot that can accommodate the valve seat. The valve seat is inserted into the installation seat and fixed by screws, which is relatively convenient for assembly. Further, the valve seat is fixed in the installation seat. After the lower port of the valve seat is paired with the hose clamp, the hemming sleeve can be clamped and fixed. The hemming sleeve and the sealing sleeve can achieve a sealing effect, so that the lower port of the valve seat is sealed.

[0014] According to the above solution, a vertical partition is provided in the valve cover. The vertical partition divides the upper chamber into a first chamber and a second chamber, and the first chamber communicates with the lower chamber through the valve port. An outlet hole is also provided on the transverse partition, and the second chamber communicates with the lower chamber through the outlet hole. Both the inlet pipe and the outlet pipe are arranged on the valve cover. The inlet pipe communicates with the first chamber, and the outlet pipe communicates with the second chamber. At the same time, the valve body is inserted and arranged in the installation seat. In order to facilitate the connection between the outlet pipe and the lower cavity, the second chamber is arranged on one side of the valve cover and communicates with the lower cavity through the outlet hole, so that both the inlet pipe and the outlet pipe are arranged on the valve cover, which is convenient for the production and manufacturing of the valve cover and the valve body and reduces the production cost.

[0015] According to the above solution, a gasket is provided between the valve cover and the transverse partition, and through holes paired with the valve port and the outlet hole are provided on the gasket. The gasket is used to increase the connection sealing performance between the valve cover and the valve seat, make the first chamber and the second chamber relatively independent, and thus establish a reliable passage between the inlet pipe, the first chamber, the lower chamber, the second chamber, and the outlet pipe.

[0016] According to the above solution, one end of the upper cover is provided with a hinge shaft, and the upper cover is rotatably mounted on the body through the hinge shaft. A panel cover is provided on the upper cover. Usually, the body is a device such as a coffee machine or a capsule coffee machine. The upper cover can be flipped on the body through the hinge shaft. When the upper cover covers the body, the sealing sleeve abuts against the body, and the valve core pushes open the butterfly valve to enable the body to supply water normally. When the upper cover is flipped up, the sealing sleeve moves away from the body, so that the water supply passage is quickly cut off, preventing the risk of hot water splashing.

[0017] A mechanical open-cover water stop valve structure of the present utility model includes a valve assembly. An inlet pipe, an upper chamber, a lower chamber, and an outlet pipe are sequentially communicated on the valve assembly. The upper chamber and the lower chamber are arranged in an up-and-down pair. A cut-off assembly is provided between the upper chamber and the lower chamber. When the upper cover is flipped from the body, the trigger member moves away from the body, and the trigger member releases the cut-off assembly to quickly cut off the above-mentioned water supply passage. At this time, the pressure in the inlet pipe and the upper chamber is applied to the cut-off assembly, while the lower chamber and the outlet pipe have no pressure or less pressure, improving the sealing performance of the valve assembly. The overall structure is compact, with good stability and high safety. Brief Description of the Drawings

[0018] Figure 1 is the overall cross-sectional structure schematic diagram of the closed state of the upper cover of the present utility model;

[0019] Figure 2 is the overall cross-sectional structure schematic diagram of the open state of the upper cover of the present utility model;

[0020] Figure 3 is the overall exploded structure schematic diagram of the present utility model;

[0021] Figure 4 is Figure 1 the enlarged structure schematic diagram of part A in

[0022] In the figure:

[0023] 1. Upper cover; 2. Valve assembly; 3. Valve core; 4. Valve cover; 10. Body; 11. Inlet pipe; 12. Outlet pipe; 13. Mounting seat; 14. Hinge shaft; 15. Panel cover; 131. Hose clamp; 21. Upper chamber; 22. Lower chamber; 23. Horizontal partition; 24. Sealing sleeve; 25. Valve seat; 231. Valve port; 232. Water outlet hole; 241. Wrapping sleeve; 31. Butterfly valve; 32. Spring; 33. Baffle; 41. Sealing gasket; 42. Vertical partition. Detailed Description of the Embodiment

[0024] The technical solution of the present utility model will be described below in conjunction with the drawings and embodiments.

[0025] Such as Figures 1-4As shown in the figure, a mechanical open - cover water - stop valve structure of the present utility model includes an upper cover 1, and the upper cover 1 is rotatably covered on the body 10. A valve assembly 2 is provided on the upper cover 1. The valve assembly 2 is provided with a water inlet pipe 11, an upper chamber 21, a lower chamber 22, and a water outlet pipe 12 that are connected in sequence. The upper chamber 21 and the lower chamber 22 are arranged in an up - and - down paired manner. A cut - off assembly is provided between the upper chamber 21 and the lower chamber 22. A trigger member is provided at the lower end of the valve assembly 2. The trigger member protrudes from the bottom surface of the upper cover 1 and is paired with the body 10. The trigger member is connected to the cut - off assembly in a cooperative manner. The valve assembly 2 is a node on the water supply path of the body 10. After the upper cover 1 is covered on the body 10, the trigger member touches the body 10 to make the cut - off assembly in an open state, and the water supply path of the body 10 is conducted. When the upper cover 1 is flipped from the body 10, the trigger member moves away from the body 10, and the trigger member releases the cut - off assembly to quickly cut off the above - mentioned water supply path. At this time, the pressure in the water inlet pipe 11 and the upper chamber 21 is applied to the cut - off assembly, while the lower chamber and the water outlet pipe have no pressure or less pressure, so as to improve the sealing performance of the valve assembly. The overall structure is compact, with good stability and high safety.

[0026] A transverse partition 23 is provided between the upper chamber 21 and the lower chamber 22, and a valve port 231 is provided on the transverse partition 23. The cut - off assembly includes a valve core 3 and a butterfly valve 31. The valve core 3 is movably inserted up and down through the valve port 231. The butterfly valve 31 is arranged in the upper chamber 21, and the upper end of the valve core 3 is fixedly connected to the butterfly valve 31. The transverse partition 23 makes the upper chamber 21 and the lower chamber 22 arranged in an up - and - down paired manner. When the trigger member is touched, the valve core 3 moves upward to make the butterfly valve 31 away from the valve port 231. At this time, the upper chamber 21 and the lower chamber 22 are in a connected state. On the contrary, when the trigger member is released, the valve core 3 moves downward to make the butterfly valve 31 close the valve port 231, so as to disconnect between the upper chamber 21 and the lower chamber 22.

[0027] The lower end of the valve assembly 2 is open - ended. The trigger member includes a sealing sleeve 24, and the sealing sleeve 24 is fixedly arranged on the lower port of the valve assembly 2. A lower chamber 22 is formed between the sealing sleeve 24 and the transverse partition 23. The lower end of the valve core 3 touches and connects to the sealing sleeve 24. The sealing sleeve 24 is fixed on the lower port of the valve assembly 2, so that the lower end of the valve core 3 touches the inner wall of the sealing sleeve 24, and a connection is formed between the two. Specifically, the sealing sleeve 24 is made of an elastic material and can deform. At the same time, the elastic sealing sleeve 24 has better sealing performance. Further, the sealing sleeve 24 protrudes from the bottom surface of the upper cover 1. When the upper cover 1 cooperates with the body 10, the sealing sleeve 24 is compressed / released, driving the valve core 3 to move upward / downward, so as to change the on - off state between the upper chamber 21 and the lower chamber 22.

[0028] A spring 32 is sleeved on the valve core 3. A baffle 33 is provided at the lower end of the valve core 3. The upper end of the spring 32 abuts against the transverse partition 23, and the lower end of the spring 32 abuts against the baffle 33. The spring 32 applies a downward force to the valve core 3, giving the butterfly valve 31 a potential energy tending to the valve orifice 231. When the sealing sleeve 24 is released, the spring 32 drives the valve core 3 to move downward rapidly, causing the butterfly valve 31 to block the valve orifice 231. At this time, the pressure in the water inlet pipe 11 and the upper chamber 21 is greater than the pressure in the lower chamber 22 and the water outlet pipe 12, further promoting the better fitting of the butterfly valve 31 to seal the valve orifice 231, improving the open - circuit stability of the valve assembly 2, and preventing safety risks caused by hot water splashing.

[0029] The valve assembly 2 includes a valve seat 25 and a valve cover 4. The transverse partition 23 is fixedly arranged in the valve seat 25. The valve cover 4 is fixedly arranged at the upper end of the valve seat 25. The upper chamber 21 is arranged between the valve cover 4 and the transverse partition 23. The lower end of the valve seat 25 is open. The sealing sleeve 24 is fixedly connected to the lower port of the valve seat 25. The lower chamber 22 is arranged between the sealing sleeve 24 and the transverse partition 23. Preferably, the valve seat 25 and the valve cover 4 are separately arranged. The valve cover 4 and the transverse partition 23 cooperate to form the upper chamber 21, and the transverse partition 23 and the sealing sleeve 24 cooperate to form the lower chamber 22. The independent arrangement of the valve seat 25 facilitates the assembly of the cut - off component. Specifically, after the valve core 3 is sleeved with the spring 32, it is inserted into the valve seat 25 from the lower port. The upper end of the valve core 3 passes through the valve orifice 231, and then the butterfly valve 31 is fixed to the upper end of the valve core 3. Then, the valve cover 4 and the sealing sleeve 24 are respectively encapsulated at the upper and lower ends of the valve seat 25 to form the valve assembly 2. The overall structure is simple and compact, easy to install, and has lower production costs.

[0030] A wrapping sleeve 241 is provided on the sealing sleeve 24. An installation seat 13 is provided on the bottom surface of the upper cover 1. A hose clamp 131 is provided at the lower end of the installation seat 13. The valve seat 25 is inserted into the installation seat 13. The wrapping sleeve 241 is clamped between the hose clamp 131 and the valve seat 25, thereby fixedly connecting the sealing sleeve 24 to the valve seat 25. And the lower end of the sealing sleeve 24 protrudes from the hose clamp 131 to be paired with the body 10. The installation seat 13 directly protrudes from the bottom surface of the upper cover 1 to form a slot for accommodating the valve seat 25. The valve seat 25 is inserted into the installation seat 13 and fixed by screws, which is relatively convenient for assembly. Further, when the valve seat 25 is fixed in the installation seat 13 and the lower port of the valve seat 25 is paired with the hose clamp 131, the wrapping sleeve 241 can be clamped and fixed. The wrapping sleeve 241 and the sealing sleeve 24 can achieve a sealing effect, making the lower port of the valve seat 25 sealed.

[0031] A vertical partition plate 42 is provided inside the valve cover 4. The vertical partition plate 42 divides the upper chamber 21 into a first chamber and a second chamber. The first chamber communicates with the lower chamber 22 through a valve port 231. A water outlet hole 232 is further provided on the horizontal partition plate 23. The second chamber communicates with the lower chamber 22 through the water outlet hole 232. The water inlet pipe 11 and the water outlet pipe 12 are both provided on the valve cover 4. The water inlet pipe 11 communicates with the first chamber, and the water outlet pipe 12 communicates with the second chamber. At the same time, the valve body is inserted and arranged in the mounting seat 13. In order to facilitate the connection of the water outlet pipe 12 to the lower cavity, a second chamber is provided on one side of the valve cover 4 and communicates with the lower cavity through the water outlet hole 232, so that the water inlet pipe 11 and the water outlet pipe 12 are both arranged on the valve cover 4, which is convenient for the production and manufacture of the valve cover 4 and the valve body, and reduces the production cost.

[0032] A gasket 41 is provided between the valve cover 4 and the horizontal partition plate 23. Through holes paired with the valve port 231 and the water outlet hole 232 are provided on the gasket 41. The gasket 41 is used to increase the connection sealing performance between the valve cover 4 and the valve seat 25, so that the first chamber and the second chamber are relatively independent, and a reliable passage is established between the water inlet pipe 11, the first chamber, the lower chamber 22, the second chamber and the water outlet pipe 12.

[0033] One end of the upper cover 1 is provided with a hinge shaft 14. The upper cover 1 is rotatably mounted on the machine body 10 through the hinge shaft 14, and a panel cover 15 is provided on the upper cover 1. Usually, the machine body 10 is a device such as a coffee machine or a capsule coffee machine. The upper cover 1 can be flipped on the machine body 10 through the hinge shaft 14. When the upper cover 1 covers the machine body 10, the sealing sleeve 24 abuts against the machine body 10, and the valve core 3 pushes open the butterfly valve 31 to enable the machine body 10 to supply water normally. When the upper cover 1 is flipped up, the sealing sleeve 24 is away from the machine body 10, so that the water supply passage is quickly cut off, preventing the risk of hot water splashing.

[0034] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A mechanical open-cover water-stop valve structure, comprising an upper cover (1), the upper cover (1) being rotatably covered on a machine body (10), a valve assembly (2) being provided on the upper cover (1), characterized in that: The valve assembly (2) is provided with a water inlet pipe (11), an upper chamber (21), a lower chamber (22) and a water outlet pipe (12) which are connected in sequence. The upper chamber (21) and the lower chamber (22) are arranged in a pair up and down. A cut-off assembly is provided between the upper chamber (21) and the lower chamber (22). The lower end of the valve assembly (2) is provided with a trigger member, which protrudes from the bottom surface of the upper cover (1) so as to be matched with the machine body (10), and the trigger member is connected with the cut-off assembly.

2. The mechanical cover-opening water-stop valve structure according to claim 1 is characterized in that: A transverse partition (23) is provided between the upper chamber (21) and the lower chamber (22), and a valve port (231) is provided on the transverse partition (23); the cut-off assembly comprises a valve core (3) and a butterfly valve (31); the valve core (3) is movably arranged in the valve port (231) up and down, the butterfly valve (31) is arranged in the upper chamber (21), and the upper end of the valve core (3) is fixedly connected to the butterfly valve (31).

3. The mechanical cover-opening water-stop valve structure according to claim 1 is characterized in that: The lower end of the valve assembly (2) is open, and the trigger member includes a sealing sleeve (24), which is fixedly arranged on the lower end of the valve assembly (2); a lower chamber (22) is formed between the sealing sleeve (24) and the diaphragm (23), and the lower end of the valve core (3) is in contact with and connected to the sealing sleeve (24).

4. The mechanical cover-opening water-stop valve structure according to claim 3 is characterized in that: The valve core (3) is sleeved with a spring (32), the lower end of the valve core (3) is provided with a baffle (33), the upper end of the spring (32) contacts the diaphragm (23), and the lower end of the spring (32) contacts the baffle (33).

5. The mechanical cover-opening water-stop valve structure according to any one of claims 1 to 3, characterized in that: The valve assembly (2) comprises a valve seat (25) and a valve cover (4); a diaphragm (23) is fixedly arranged in the valve seat (25); the valve cover (4) is fixedly arranged at the upper end of the valve seat (25); and an upper chamber (21) is arranged between the valve cover (4) and the diaphragm (23); the lower end of the valve seat (25) is opened, a sealing sleeve (24) is fixedly connected to a lower end of the valve seat (25), and a lower chamber (22) is arranged between the sealing sleeve (24) and the diaphragm (23).

6. The mechanical cover-opening water-stop valve structure according to claim 5 is characterized in that: The sealing sleeve (24) is provided with an edge sleeve (241), the bottom surface of the upper cover (1) is provided with a mounting seat (13), and the lower end of the mounting seat (13) is provided with a throat clamp (131); The valve seat (25) is inserted into the mounting seat (13), and the edging sleeve (241) is clamped between the throat hoop (131) and the valve seat (25) so as to fix the sealing sleeve (24) and the valve seat (25), and the lower end of the sealing sleeve (24) protrudes from the throat hoop (131) so as to be matched with the body (10).

7. The mechanical cover-opening water-stop valve structure according to claim 5 is characterized in that: A vertical partition (42) is provided inside the valve cover (4), and the vertical partition (42) divides the upper chamber (21) into a first chamber and a second chamber, and the first chamber is connected to the lower chamber (22) through the valve port (231); a water outlet hole (232) is also provided on the horizontal partition (23), and the second chamber is connected to the lower chamber (22) through the water outlet hole (232); the water inlet pipe (11) and the water outlet pipe (12) are both provided on the valve cover (4), and the water inlet pipe (11) is connected to the first chamber, and the water outlet pipe (12) is connected to the second chamber.

8. The mechanical cover-opening water-stop valve structure according to claim 7 is characterized in that: A sealing gasket (41) is provided between the valve cover (4) and the diaphragm (23), and a through hole matching the valve port (231) and the water outlet hole (232) is provided on the sealing gasket (41).

9. The mechanical cover-opening water-stop valve structure according to claim 1, characterized in that: A hinge shaft (14) is provided at one end of the upper cover (1), and the upper cover (1) is rotatably mounted on the machine body (10) via the hinge shaft (14). A panel cover (15) is provided on the upper cover (1).

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