CN210533690U

CN210533690U - Detection mechanism for improving assembly qualification rate and production efficiency of electromagnetic valve

Info

Publication number: CN210533690U
Application number: CN201921794143.9U
Authority: CN
Inventors: 赵明辉; 李家兴; 白向达; 贺润达
Original assignee: Beijing Jr Automation Byjc Assembly Line Co ltd
Current assignee: Beijing Jr Automation Byjc Assembly Line Co ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-05-15
Anticipated expiration: 2029-10-22

Abstract

The utility model relates to a detection mechanism for improving solenoid valve assembly qualification rate and production efficiency, which comprises a rotary workbench, a feeding chain, a material supporting device, a channel changing device and a detection device, wherein the rotary workbench is used for placing a solenoid valve carrier and is horizontally arranged, the feeding chain is arranged on one side of the rotary workbench and is used for conveying VBS terminals, the material supporting device is arranged on one side of the rotary workbench and is used for clamping and fixing the solenoid valve carrier, the channel changing device is arranged above the feeding chain, and the detection device is used for detecting the VBS terminals to be inserted into the solenoid valve carrier; the lane changing device comprises a pneumatic finger for clamping a VBS terminal, a first driving assembly for driving the pneumatic finger to vertically move and a second driving assembly for driving the pneumatic finger to horizontally move. The utility model has the advantages that can detect the VBS terminal, improve the qualification rate of solenoid valve assembly, and then improve production efficiency.

Description

Detection mechanism for improving assembly qualification rate and production efficiency of electromagnetic valve

Technical Field

The utility model belongs to the technical field of the detection technique of automobile spare and accessory part solenoid valve and specifically relates to a detection mechanism who improves solenoid valve assembly qualification rate and production efficiency is related to.

Background

An Electromagnetic valve (Electromagnetic valve) is an industrial device controlled by electromagnetism, is an automatic basic element for controlling fluid, belongs to an actuator, and is not limited to hydraulic pressure and pneumatic pressure. Used in industrial control systems to regulate the direction, flow, velocity and other parameters of a medium. The solenoid valve can be matched with different circuits to realize expected control, and the control precision and flexibility can be ensured. There are many types of solenoid valves, with different solenoid valves functioning at different locations in the control system, the most common being one-way valves, safety valves, directional control valves, speed control valves, etc.

The electromagnetic valve is an important component for realizing the normal operation of the automobile function. The working principle of the automobile electromagnetic valve is as follows: when the valve is electrified, the electromagnetic coil generates electromagnetic force to lift the closing piece from the valve seat, and the valve is opened; when the power is cut off, the electromagnetic force disappears, the spring presses the closing part on the valve seat, and the valve is closed.

The inserting assembly of the VBS terminal is a process in the electromagnetic valve assembly process, if the VBS terminal has defects before being inserted, the VBS terminal can be in poor contact with an enameled wire after being inserted, the electromagnetic valve is caused to fail, and therefore the assembly qualification rate and the production efficiency of the electromagnetic valve can be reduced.

The detection mechanism for improving the assembly qualification rate and the production efficiency of the electromagnetic valve is provided.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing an improve detection mechanism of solenoid valve assembly qualification rate and production efficiency, its advantage can detect the VBS terminal, improves the qualification rate of solenoid valve assembly, and then improves production efficiency.

The above object of the present invention can be achieved by the following technical solutions: a detection mechanism for improving the assembly qualification rate and the production efficiency of an electromagnetic valve comprises a rotary workbench, a feeding chain, a material supporting device, a channel changing device and a detection device, wherein the rotary workbench is used for placing an electromagnetic valve carrier and is horizontally arranged, the feeding chain is arranged on one side of the rotary workbench and is used for conveying VBS terminals, the material supporting device is arranged on one side of the rotary workbench and is used for clamping and fixing the electromagnetic valve carrier, the channel changing device is arranged above the feeding chain, and the detection device is used for detecting the VBS terminals to be inserted into the electromagnetic valve carrier;

the lane changing device comprises a pneumatic finger for clamping a VBS terminal, a first driving assembly for driving the pneumatic finger to vertically move and a second driving assembly for driving the pneumatic finger to horizontally move.

By adopting the technical scheme, when assembling the VBS terminals, the electromagnetic valve carrier is fixed through the material supporting device, the second driving component drives the pneumatic finger to horizontally move to the position right above the feeding chain, the first driving component drives the pneumatic finger to vertically move downwards, so that the pneumatic finger clamps a pair of VBS terminals, then the first driving component and the second driving component adjust the height and the position of the pneumatic finger, so that the VBS terminals are positioned right above the electromagnetic valve carrier to be assembled and are right opposite to the detection device, at the moment, the detection device detects the VBS terminals, a qualified instruction is sent to the pneumatic finger through data comparison analysis, if the VBS terminals are qualified, the first driving component drives the pneumatic finger to move downwards, the VBS terminals are inserted into the electromagnetic valve carrier, and if the VBS terminals are unqualified, the second driving component drives the pneumatic finger to move away and release the unqualified VBS terminals, then repeating the above operations until the assembly is completed; compare assembly mechanism among the prior art, detection mechanism in this application can detect the VBS terminal, has improved the qualification rate and the production efficiency of solenoid valve assembly greatly.

The utility model discloses further set up to: the electromagnetic valve carrier is fixed on the rotary workbench through an angle steel connecting piece;

the material supporting device comprises a base, a horizontal cylinder, a push plate and a limiting cylinder, wherein the base is fixed on the ground and located on one side of the rotary workbench, the horizontal cylinder is mounted on the upper surface of the base, the push plate is fixedly connected to the free end of a piston rod of the horizontal cylinder, the limiting cylinder is fixedly connected to the side, far away from the horizontal cylinder, of the push plate, and the limiting cylinder can be sleeved outside a cantilever end of the electromagnetic valve carrier and tightly clamped between the limiting cylinder and the angle steel connecting piece.

By adopting the technical scheme, after the electromagnetic valve carrier is in place, the horizontal cylinder stretches and retracts to drive the limiting cylinder to move towards the direction of the workbench until the limiting cylinder is sleeved outside the cantilever end of the electromagnetic valve carrier and is clamped and fixed with the angle steel connecting piece, and the stability of the VBS terminal is improved.

The utility model discloses further set up to: the first driving assembly comprises a vertical cylinder arranged above the pneumatic finger, a piston rod of the vertical cylinder is fixedly connected with the pneumatic finger, and a cylinder body of the vertical cylinder is arranged on the second driving assembly in a sliding mode.

Through adopting above-mentioned technical scheme, vertical cylinder can drive pneumatic finger and move in the vertical direction to pneumatic finger can be got or install on the solenoid valve carrier by the last clamp of pay-off chain with the VBS terminal.

The utility model discloses further set up to: the second drive assembly is in including motor linear slide rail, the rigid coupling that the level set up motor linear slide rail bottom and the bracing piece that is located its both ends department and sliding connection are in slider on the motor linear slide rail, the bottom of bracing piece is fixed with ground through the bolt, the cylinder body rigid coupling of vertical cylinder is in on the slider.

Through adopting above-mentioned technical scheme, motor linear slide rail accessible slider drives vertical cylinder and slides along the horizontal direction to adjust the position of pneumatic finger.

The utility model discloses further set up to: the detection device comprises a camera which is arranged above the rotary workbench and is used for detecting the VBS terminal to be assembled.

By adopting the technical scheme, when the VBS terminal is clamped by the pneumatic finger and moves above the corresponding electromagnetic valve carrier, the camera photographs the VBS terminal and records the result to the PLC and the MELOIE, and then the qualified instruction is sent to the pneumatic finger through data comparison and analysis.

The utility model discloses further set up to: still include the rigid coupling in subaerial and be "L" shape support frame, the camera setting is installed the bottom of the horizon bar of support frame.

Through adopting above-mentioned technical scheme, the setting of support frame for fix the camera, make it keep with the position such as VBS terminal height that awaits measuring.

The utility model discloses further set up to: a positioning device is arranged above the material supporting device, the positioning device comprises a support which is fixedly connected to a base and is arranged in an inverted L shape, a linear guide rail which is fixedly connected to one side of a short side of the support and is parallel to a long side of the support, a moving block which is slidably connected to the linear guide rail, an angle iron which is installed on the moving block, and an extension plate which is fixedly connected to the lower surface of the angle iron and is positioned below the pneumatic finger, and a positioning hole for a qualified VBS terminal to pass through so as to be installed on a solenoid valve carrier is formed in the extension plate;

the lower surface rigid coupling of extension board has the deflector, the position rigid coupling that is located spacing section of thick bamboo below on the base has special-shaped fixed block, special-shaped fixed block is located the position difference rigid coupling of spacing section of thick bamboo radial both sides has the vertical guide bar that upwards extends, two the guide bar passes the deflector, two the cover is equipped with the spring on the guide bar, the one end and the special-shaped fixed block butt of spring, the other end and deflector butt.

By adopting the technical scheme, the positioning device is used for accurately positioning the VBS terminal, so that the VBS terminal is prevented from deviating to one side in the assembling process, and the mounting precision is ensured; when the VBS terminal is detected to be qualified, the vertical cylinder drives the pneumatic finger to move downwards, so that the VBS terminal penetrates through the positioning hole, when the pneumatic finger is in contact with the extension plate, the pneumatic finger pushes the extension plate to continue to move downwards along the linear guide rail and the guide rod until the VBS terminal is inserted into the electromagnetic valve carrier, assembly is completed, and the spring is arranged and used for supporting, resetting and buffering the positioning device.

The utility model discloses further set up to: and a hopper container is arranged below the lane changing device and at one side of the feeding chain.

Through adopting above-mentioned technical scheme, the setting of funnel container for collect unqualified VBS terminal.

To sum up, the utility model discloses a beneficial technological effect does:

1. the material supporting device can fix an electromagnetic carrier to be assembled; the switching device can convey the VBS terminal to the position right above the corresponding electromagnetic valve carrier from the feeding chain, manual assembly is not needed, and assembly efficiency is improved; the detection mechanism can detect the VBS terminal, and the qualified VBS terminal is installed on the electromagnetic valve carrier, so that the qualified rate and the production efficiency of electromagnetic valve assembly are greatly improved;

2. the positioning device is used for accurately positioning the VBS terminal, so that the VBS terminal is prevented from deviating to one side in the assembling process, and the mounting precision is ensured;

3. and the funnel container is used for collecting unqualified VBS terminals.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view showing a connection relationship between a first driving assembly and a pneumatic finger;

fig. 3 is a schematic view showing the connection relationship and structure between the supporting device and the positioning device.

In the figure, 1, a solenoid valve carrier; 2. a feeding chain; 3. a material supporting device; 31. a base; 32. a horizontal cylinder; 33. pushing the plate; 34. a limiting cylinder; 4. a lane changing device; 41. a pneumatic finger; 42. a first drive assembly; 421. a vertical cylinder; 422. a connecting plate; 43. a second drive assembly; 431. a motor linear slide rail; 432. a support bar; 433. a slider; 5. a VBS terminal; 6. a detection device; 61. a camera; 62. a vertical rod; 63. a horizontal bar; 64. a connecting rod; 65. connecting blocks; 7. a rotary table; 71. a motor assembly; 72. an angle steel connecting piece; 8. a funnel container; 9. a positioning device; 91. a fixing plate; 92. a linear guide rail; 93. a moving block; 94. angle iron; 95. an extension plate; 951. positioning holes; 96. a guide plate; 97. a special-shaped fixed block; 98. a guide bar; 99. a spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the detection mechanism for improving the solenoid valve assembly qualification rate and the production efficiency disclosed by the utility model, the detection mechanism comprises a workbench, a feeding chain 2, a material supporting device 3, a lane changing device 4 and a detection device 6, wherein the workbench is used for placing a solenoid valve carrier 1 and is horizontally arranged, the feeding chain 2 is arranged on one side of the workbench, the material supporting device 3 is fixed on the ground and is positioned on one side opposite to the feeding chain 2, the VBS terminal 5 to be inserted into the solenoid valve carrier 1 is detected by the detection device 6, and the feeding chain 2 is used for conveying the VBS terminal 5; the material supporting device 3 is used for clamping and fixing the electromagnetic valve carrier 1; the lane-changing device 4 is used for clamping the VBS terminal 5 from the feeding chain 2 and inserting the VBS terminal into the solenoid valve carrier 1 in place.

Referring to fig. 1, the workbench is a rotary workbench 7, a motor assembly 71 for driving the rotary workbench 7 to rotate is arranged on the lower surface of the workbench, the solenoid valve carrier 1 is fixed on the rotary workbench 7 through an angle steel connector 72, when the solenoid valve carrier 1 rotates to the material supporting device 3 along with the rotary workbench 7, the solenoid valve carrier stops and waits for the insertion of the VBS terminal 5, and after the installation is completed, the rotary workbench 7 continues to rotate, so that the next solenoid valve carrier 1 moves to a proper position (it should be noted here that the VBS terminal 5 is in a long strip plate shape).

The feeding chain 2 is an existing active conveying mechanism, and a hopper container 8 for collecting unqualified VBS terminals 5 is arranged on one side of the feeding chain 2.

Referring to fig. 3, the material supporting device 3 includes a base 31 fixed on the ground and located on one side of the rotary worktable 7, a horizontal cylinder 32 installed on the upper surface of the base 31, a push plate 33 fixedly connected to the free end of the piston rod of the horizontal cylinder 32, and a limiting cylinder 34 fixedly connected to one side of the push plate 33 away from the horizontal cylinder 32, wherein the limiting cylinder 34 is hollow and has an open end close to the rotary worktable 7, and the inner diameter thereof is adapted to the outer diameter of the cantilever end of the solenoid valve carrier 1 (see fig. 1).

Referring to fig. 1 and 3, after the solenoid valve carrier 1 is in place, the horizontal cylinder 32 stretches and retracts to drive the limiting cylinder 34 to move towards the direction of the rotary workbench 7 until the limiting cylinder is sleeved outside the cantilever end of the solenoid valve carrier 1 and clamped and fixed with the angle steel connecting piece 72, so that the stability of the VBS terminal 5 during installation is improved.

Referring to fig. 1, the lane-changing device 4 includes a pneumatic finger 41 for clamping the VBS terminal 5, a first driving assembly 42 for driving the pneumatic finger 41 to move vertically, and a second driving assembly 43 for driving the pneumatic finger 41 to move horizontally. The second driving assembly 43 includes a motor linear sliding rail 431 horizontally disposed, a supporting rod 432 vertically disposed is fixedly connected to the bottom of the motor linear sliding rail 431 and at two ends of the motor linear sliding rail 431, the bottom of the supporting rod 432 is fixed to the ground through a bolt, and the first driving assembly 42 is slidably disposed on the motor linear sliding rail 431 through a slider 433.

The first driving assembly 42 includes a vertical cylinder 421 fixed on the slider 433, and the vertical cylinder 421 can move along the linear sliding rail 431 of the motor along the slider 433 in the horizontal direction. Piston rod bottom rigid coupling of vertical cylinder 421 has connecting plate 422, and pneumatic finger 41 sets firmly in connecting plate 422's bottom, during the action, drives vertical cylinder 421 horizontal slip through motor linear slide rail 431, gets the back with VBS terminal 5 clamp, drives pneumatic finger 41 through vertical cylinder 421 in vertical direction up-and-down motion, adjusts to the height that makes things convenient for detection device 6 to detect.

Referring to fig. 1, the detection device 6 includes a camera 61 for photographing and detecting the VBS terminal 5 conveyed to a position right above the solenoid valve carrier 1 (see fig. 1), a support frame in an "L" shape is fixedly connected to the ground, the support frame includes a vertical rod 62 vertically arranged and a horizontal rod 63 horizontally fixedly connected to an upper end of the vertical rod 62, a connecting rod 64 is fixedly connected to a bottom of the horizontal rod 63 and an end far away from the vertical rod 62, a connecting block 65 is fixedly connected to a lower end of the connecting rod 64, and the camera 61 is fixedly connected to a side wall of the connecting block 65. When the pneumatic finger 41 (see the figure) conveys the VBS terminal 5 to the position right above the electromagnetic valve carrier 1, the camera 61 shoots the VBS terminal 5 rightly and records the result to the PLC, the qualified or unqualified instruction is sent to the pneumatic finger 41 through data comparison and analysis, if the VBS terminal is unqualified, the pneumatic finger 41 conveys the VBS terminal 5 to the funnel container 8, the workpiece is continuously taken and detected, and if the VBS terminal is qualified, the pneumatic finger 41 is driven to move downwards through the vertical air cylinder 421, and the VBS terminal 5 is inserted into the electromagnetic valve carrier 1. Compare assembly mechanism among the prior art, detection mechanism in this application can detect VBS terminal 5, has improved the qualification rate and the production efficiency of solenoid valve assembly greatly.

Referring to fig. 1 and 3, in order to ensure the installation accuracy, a positioning device 9 is arranged above the material supporting device 3 and used for accurately positioning the VBS terminal 5 and avoiding the assembly process from deviating to one side. The positioning device 9 includes a support 91 fixedly connected to the base 31 and disposed in an inverted "L" shape, a linear guide rail 92 fixedly connected to one side of a short side of the support 91 and parallel to a long side of the support 91, a moving block 93 slidably connected to the linear guide rail 92, an angle iron 94 mounted on the moving block 93, and an extension plate 95 fixedly connected to a lower surface of the angle iron 94 and located below the pneumatic finger 41, wherein a positioning hole 951 vertically penetrating through the extension plate 95 is formed in a position right below the VBS terminal 5 clamped by the pneumatic finger 41 on the extension plate 95, and the positioning hole 951 is opposite to an installation position of the solenoid valve carrier 1.

The lower surface rigid coupling of extension plate 95 has deflector 96, the position rigid coupling that lies in spacing section of thick bamboo 34 below on base 31 has special-shaped fixed block 97, the position rigid coupling that special-shaped fixed block 97 lies in the radial both sides of spacing section of thick bamboo 34 has vertical guide bar 98 that upwards extends respectively, two guide bars 98 pass deflector 96, make deflector 96 can be vertical slip on guide bar 98, the cover is equipped with spring 99 respectively on two guide bars 98, its one end and special-shaped fixed block 97 butt, the other end and deflector 96 butt.

When the VBS terminal 5 is detected to be qualified, the vertical cylinder 421 drives the pneumatic finger 41 to move downward, so that the VBS terminal 5 passes through the positioning hole 951, when the pneumatic finger 41 contacts the extension plate 95, the pneumatic finger pushes the extension plate 95 to continue to move downward along the linear guide rail 92 and the guide rod 98 until the VBS terminal 5 is inserted into the solenoid valve carrier 1, the assembly is completed, and the spring 99 is arranged to support, reset and buffer the positioning device 9.

The working process is as follows: when the VBS terminals 5 are assembled, the second driving component 43 drives the pneumatic finger 41 to move along the motor linear slide rail 431 to a position right above the feeding chain 2, the pneumatic finger 41 is loosened, the vertical cylinder 421 drives the pneumatic finger 41 to move vertically downwards, after the pneumatic finger 41 clamps a pair of VBS terminals 5, the vertical cylinder 421 drives the pneumatic finger 41 and the VBS terminals 5 to move vertically upwards together, then the pneumatic finger 41 and the VBS terminals 5 are driven by the second driving component 43 to move horizontally to a position right above the solenoid valve carrier 1 and have the same height as the camera 61, at this time, the camera 61 takes a picture of the VBS terminals 5 and records the result into the PLC and the MELODIE, through data comparison and analysis, a qualified or not instruction is sent to the pneumatic finger 41, if qualified, the vertical cylinder 421 drives the pneumatic finger 41 to move downwards, and then the VBS terminals 5 are inserted into the corresponding solenoid valve carrier 1, if the VBS terminal is unqualified, the second driving assembly 43 drives the pneumatic finger 41 to horizontally slide to the position right above the funnel container 8, and then the unqualified VBS terminal 5 is released.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides an improve detection mechanism of solenoid valve assembly qualification rate and production efficiency, characterized by: the device comprises a rotary workbench (7) which is used for placing an electromagnetic valve carrier (1) and is horizontally arranged, a feeding chain (2) which is arranged on one side of the rotary workbench (7) and is used for conveying a VBS terminal (5), a material supporting device (3) which is arranged on one side of the rotary workbench (7) and is used for clamping and fixing the electromagnetic valve carrier (1), a channel switching device (4) which is arranged above the feeding chain (2), and a detection device (6) which is used for detecting the VBS terminal (5) to be inserted into the electromagnetic valve carrier (1);

the lane changing device (4) comprises a pneumatic finger (41) used for clamping the VBS terminal (5), a first driving assembly (42) driving the pneumatic finger (41) to vertically move and a second driving assembly (43) driving the pneumatic finger (41) to horizontally move.

2. The detection mechanism for improving the assembly qualification rate and the production efficiency of the electromagnetic valve according to claim 1, which is characterized in that: the electromagnetic valve carrier (1) is fixed on the rotary workbench (7) through an angle steel connecting piece (72);

hold in the palm material device (3) including fix subaerial and be located base (31) of rotation type workstation (7) one side, install horizontal cylinder (32) of base (31) upper surface, rigid coupling are in push pedal (33) of the piston rod free end of horizontal cylinder (32) and rigid coupling are in push pedal (33) are kept away from spacing section of thick bamboo (34) of horizontal cylinder (32) one side, spacing section of thick bamboo (34) can cup joint in the outside of the cantilever end of solenoid valve carrier (1) and with the angle steel connecting piece (72) between press from both sides it tightly.

3. The detection mechanism for improving the assembly qualification rate and the production efficiency of the electromagnetic valve according to claim 1, which is characterized in that: the first driving assembly (42) comprises a vertical cylinder (421) arranged above the pneumatic finger (41), a piston rod of the vertical cylinder (421) is fixedly connected with the pneumatic finger (41), and a cylinder body of the vertical cylinder (421) is arranged on the second driving assembly (43) in a sliding mode.

4. The detection mechanism for improving the assembly qualification rate and the production efficiency of the electromagnetic valve according to claim 3, characterized in that: second drive assembly (43) are in including motor linear slide rail (431), the rigid coupling that the level set up motor linear slide rail (431) bottom and be located bracing piece (432) and the sliding connection of its both ends department are in slider (433) on motor linear slide rail (431), the bottom of bracing piece (432) is passed through the bolt and is fixed with ground, the cylinder body rigid coupling of vertical cylinder (421) is in on slider (433).

5. The detection mechanism for improving the assembly qualification rate and the production efficiency of the electromagnetic valve according to claim 1, which is characterized in that: the detection device (6) comprises a camera (61) arranged above the rotary worktable (7) to detect the VBS terminal (5) to be assembled.

6. The detection mechanism for improving the assembly qualification rate and the production efficiency of the electromagnetic valve according to claim 5, wherein: still include the rigid coupling in subaerial and be the support frame of "L" shape, camera (61) setting is installed the bottom of horizontal pole (63) of support frame.

7. The detection mechanism for improving the assembly qualification rate and the production efficiency of the electromagnetic valve according to claim 2, characterized in that: a positioning device (9) is arranged above the material supporting device (3), the positioning device (9) comprises a support (91) which is fixedly connected to the base (31) and is arranged in an inverted L shape, a linear guide rail (92) which is fixedly connected to one side of a short side of the support (91) and is parallel to a long side of the support, a moving block (93) which is slidably connected to the linear guide rail (92), an angle iron (94) which is installed on the moving block (93), and an extension plate (95) which is fixedly connected to the lower surface of the angle iron (94) and is positioned below the pneumatic finger (41), and a positioning hole (951) through which a qualified VBS terminal (5) passes is formed in the extension plate (95);

the lower surface rigid coupling of extension board (95) has deflector (96), the position rigid coupling that lies in spacing section of thick bamboo (34) below on base (31) has special-shaped fixed block (97), special-shaped fixed block (97) are located the position of the radial both sides of spacing section of thick bamboo (34) rigid coupling respectively has vertical guide bar (98) that upwards extend, two guide bar (98) pass deflector (96), two the cover is equipped with spring (99) on guide bar (98), the one end and special-shaped fixed block (97) butt, the other end and deflector (96) butt of spring (99).

8. The detection mechanism for improving the assembly qualification rate and the production efficiency of the electromagnetic valve according to claim 1, which is characterized in that: and a hopper container (8) is arranged below the channel changing device (4) and at the position on one side of the feeding chain (2).