Vertical machining center with cutting fluid filtering function

Abstract

The vertical machining center with the cutting fluid filtering function comprises a vertical machining center body, a water tank is embedded in the bottom of the front side of the vertical machining center body, and two driving wheels are rotationally connected between the inner wall of the front side and the inner wall of the rear side of the water tank. The two driving wheels are in transmission connection with the same conveyor belt type filter screen in a tightened state, and a driving motor fixedly connected with the front side of the driving wheel on the left side is fixedly installed on the front side of the water tank. By arranging a series of structures, cutting chips of cutting fluid can be conveniently filtered out, the cutting chips can be automatically and timely discharged during filtering, the conveying belt type filter screen can be automatically and timely cleaned and dredged during filtering, air is blown to assist the cutting chips to be rapidly discharged downwards, and the phenomenon of blockage caused by static accumulation of the cutting chips is avoided; the continuous stability of filtration is improved, and the internal slag removal does not need to be manually carried out, so that the cleaning automation degree is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical machining centers, in particular to a vertical machining center with a cutting fluid filtering function. Background Art

[0002] A machining center is a highly automated multifunctional CNC machine tool with a tool magazine and automatic tool changing device. A vertical machining center refers to a machining center in which the spindle axis is arranged perpendicular to the worktable. It is mainly suitable for machining complex parts such as plates, discs, molds and small shells. When a vertical machining center processes a workpiece, it usually uses cutting fluid to flush the workpiece and the tool to make it more convenient to process the workpiece. After the workpiece is processed by the tool, the existing machining center usually directly recycles the flushed cutting fluid. However, after the flushing process, the cutting fluid contains a large amount of cutting chips. In the subsequent flushing process, the wear between the tool and the workpiece may increase, and the recycling of the cutting fluid is not utilized.

[0003] In this regard, CN219485091U discloses a vertical machining center with a cutting fluid filtering function, including a machining center body, a water tank fixedly installed at the bottom of the inner wall of the machining center body, a filter cabinet slidably installed on the inner wall of the water tank, a filter hole penetrated through the bottom of the filter cabinet, a handle fixedly installed on the front of the filter cabinet, an auxiliary sliding mechanism is provided on one side of the water tank, a water pump is fixedly installed on one side of the water tank, a water suction pipe is provided at one end of the water pump, and an output pipe is provided at one end of the water pump; the water pump extracts the cutting fluid inside the water tank through the water suction pipe, sprays the cutting fluid on the workpiece and the tool through the nozzle, the cutting fluid mixed with the cutting chips falls into the inside of the water tank through the leakage hole, the cutting chips inside the cutting fluid are filtered by the filter cabinet and the filter hole, the cutting fluid after filtering falls to the bottom of the water tank, and the water pump can extract the filtered cutting fluid through the water suction pipe for recycling.

[0004] The above technology discloses a vertical machining center with a cutting fluid filtering function. By installing a filter cabinet with filter holes in a water tank in the machining center, the cutting chips in the cutting fluid are filtered and intercepted, which is convenient for the recycling of the cutting fluid. However, there are still the following shortcomings: 1. Although the cutting chips can be intercepted by the filter cabinet with filter holes, the cutting chips are statically accumulated in the filter cabinet and block the filter holes. The continuous stability of the filtration is not ideal and needs to be improved. In view of this, a vertical machining center with a cutting fluid filtering function is proposed. Utility Model Content

[0005] The utility model aims to provide a vertical machining center with a cutting fluid filtering function to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vertical machining center with a cutting fluid filtering function, comprising a vertical machining center body, a water tank is embedded in the front bottom of the vertical machining center body, two driving wheels are rotatably connected between the front inner wall and the rear inner wall of the water tank, the two driving wheels are transmission-connected with the same conveyor belt filter in a tightened state, a driving motor fixedly connected to the front side of the left driving wheel is fixedly installed on the front side of the water tank, a supporting assembly located in the conveyor belt filter is installed between the front inner wall and the rear inner wall of the water tank, the supporting assembly is used to support the inner top of the conveyor belt filter, the driving motor cooperates with the two driving wheels to drive the conveyor belt filter to rotate, and the arranged conveyor belt filter is used to filter the cutting chips in the cutting fluid and transport the cutting chips to the right and discharge them;

[0007] A separation scraper assembly is fixedly connected between the bottom inner wall, the front inner wall and the rear inner wall of the water tank, and the separation scraper assembly is in active contact with the bottom right side of the conveyor belt filter screen, and the separation scraper assembly is used to scrape and clean the bottom of the conveyor belt filter screen;

[0008] The right inner wall of the water tank is set as an inclined surface, and a rectangular slag discharge pipe is fixedly connected to the right side of the bottom of the water tank, and a backblowing cleaning component located in the conveyor belt filter is fixedly connected between the front inner wall and the rear inner wall of the water tank, and an auxiliary downward blowing slag discharge component located on the right side of the conveyor belt filter is fixedly connected between the front inner wall and the rear inner wall of the water tank, and the front ends of the backblowing cleaning component and the auxiliary downward blowing slag discharge component both extend to the front side of the water tank, and an air pump is fixedly installed on the front side of the water tank, and an air outlet of the air pump is connected and fixed with a connecting pipe, and both ends of the connecting pipe are respectively connected and fixed to one end close to the backblowing cleaning component and the auxiliary downward blowing slag discharge component, and air is supplied to the backblowing cleaning component and the auxiliary downward blowing slag discharge component by using the air pump and the connecting pipe, and the backblowing cleaning component is used to backblow and clean the rotating conveyor belt filter from the inside downward, and the auxiliary downward blowing slag discharge component is used to blow downward and discharge the cutting chips discharged to the right.

[0009] Preferably, the support assembly includes a plurality of support rollers rotatably installed at equal intervals between the front inner wall and the rear inner wall of the water tank, and the tops of the support rollers are in active contact with the inner top of the conveyor belt filter; the plurality of support rollers evenly spaced are used to achieve the effect of stably supporting and preventing the inner top of the conveyor belt filter from collapsing.

[0010] Preferably, the partitioning and scraping assembly includes a partition fixedly connected between the bottom inner wall, the front inner wall and the rear inner wall of the water tank, and a scraper is fixedly connected to the top of the partition, and the top of the scraper is in active contact with the bottom right side of the conveyor belt filter; the partition and the scraper cooperate with each other, the partition is used to shield the cutting fluid, and the scraper is used to scrape and clean the bottom of the conveyor belt filter when it rotates.

[0011] Preferably, the backflush cleaning component includes a first circular tube fixedly connected between the front inner wall and the rear inner wall of the water tank, the first circular tube is located in the conveyor belt filter, the right bottom of the first circular tube is connected and fixed with a plurality of backflush pipe heads arranged downwardly inclined, the backflush pipe heads cooperate with the inner bottom of the conveyor belt filter, the front end of the first circular tube extends to the front side of the water tank and is arranged to be a blocking structure, the right inner wall of the first circular tube is connected and fixed to the left end of the connecting pipe; the arranged first circular tube and the backflush pipe head cooperate, after the gas enters the first circular tube through the connecting pipe, the plurality of backflush pipe heads are used to blow the gas downward to backflush and clean the rotating conveyor belt filter from the inside downward.

[0012] Preferably, the auxiliary downward blowing slag removal assembly includes a second circular tube fixedly connected between the front inner wall and the rear inner wall of the water tank, the second circular tube is located on the right side of the conveyor belt filter, and the bottom of the second circular tube is connected and fixed with multiple downward blowing pipe heads. The front end of the second circular tube extends to the front side of the water tank and is arranged as a blocking structure, and the left inner wall of the second circular tube is connected and fixed to the right end of the connecting pipe; the second circular tube and the downward blowing pipe head cooperate, and the gas enters the second circular tube through the connecting pipe and is blown downward through the downward blowing pipe head, so that the cutting chips transported to the right by the conveyor belt filter are blown downward and discharged.

[0013] Preferably, an embedding hole fixedly connected to the outside of a water tank is provided at the front bottom of the vertical machining center body, and the water tank is filled with cutting fluid located below the conveyor belt filter, and the cutting fluid is located on the left side of the partition.

[0014] Preferably, the four bottom corners of the vertical machining center body are fixedly connected with supporting feet, a slag receiving box is arranged below the vertical machining center body, the slag receiving box is located below the rectangular slag discharge pipe, and an inclined guide plate located above the water tank is fixedly connected to the right inner wall of the vertical machining center body, and the inclined guide plate is inclined to the lower left.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. This vertical machining center with cutting fluid filtering function can filter and intercept cutting fluid and cutting chips through the cooperation of the driving motor, driving wheel, conveyor belt filter and rectangular slag discharge pipe, and can automatically discharge the cutting chips to the right from the conveyor belt filter during filtering, so as to avoid the phenomenon of static accumulation of cutting chips and resulting in blockage;

[0017] 2. This vertical machining center with cutting fluid filtering function can automatically scrape and clean the bottom of the conveyor belt filter when it rotates through the cooperation of the set air pump, connecting pipe, separation scraping and cleaning component, backblowing cleaning component and auxiliary downward blowing slag removal component. When the air pump is started, the conveyor belt filter can be backblown and cleaned from the inside to the bottom and the impurities discharged to the right can be blown downward. The downward blowing can be used to achieve auxiliary rapid slag removal. Through the cooperation of automatic cleaning of the conveyor belt filter and rapid discharge of cutting chips by blowing, the continuous dredging of the conveyor belt filter can be guaranteed, the continuous stability of filtration is improved, and there is no need for manual internal slag cleaning, thereby improving the degree of cleaning automation.

[0018] The utility model is provided with a series of structures, which is convenient for filtering cutting chips from cutting fluid and automatically discharging cutting chips in time during filtering. It is convenient for automatically and timely cleaning and dredging of the conveyor filter screen and blowing to assist the cutting chips to be quickly discharged downward during filtering, avoiding the phenomenon of static accumulation of cutting chips leading to blockage, improving the continuous stability of filtration, and eliminating the need for manual internal slag cleaning, thereby improving the degree of cleaning automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0020] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;

[0021] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure of part A in the figure.

[0022] In the figure: 1. vertical machining center body; 101. embedding hole; 102. water tank; 2. driving wheel; 3. conveyor belt filter; 4. driving motor; 5. supporting roller; 6. partition; 7. scraper; 8. first round pipe; 9. backblowing pipe head; 10. second round pipe; 11. downblowing pipe head; 12. rectangular slag discharge pipe; 13. connecting pipe; 14. air pump; 15. inclined guide plate; 16. slag receiving box. DETAILED DESCRIPTION

[0023] 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.

[0024] like Figures 1 to 3As shown, a vertical machining center with a cutting fluid filtering function proposed in this embodiment includes a vertical machining center body 1, a water tank 102 is embedded in the front bottom of the vertical machining center body 1, wherein an embedding hole 101 fixedly connected to the outside of the water tank 102 is opened at the front bottom of the vertical machining center body 1, and the embedded hole 101 is provided to achieve the effect of embedding the water tank 102, and the four corners of the bottom of the vertical machining center body 1 are fixedly connected with supporting feet, and two driving wheels 2 are rotatably connected between the front inner wall and the rear inner wall of the water tank 102, and the two driving wheels 2 are transmission-connected with the same tensioning member. The conveyor filter 3 is in a tight state, the water tank 102 is filled with cutting fluid located below the conveyor filter 3, a driving motor 4 fixedly connected to the front side of the driving wheel 2 on the left is fixedly installed on the front side of the water tank 102, a supporting assembly located inside the conveyor filter 3 is installed between the front inner wall and the rear inner wall of the water tank 102, the supporting assembly is used to support the inner top of the conveyor filter 3, the driving motor 4 cooperates with the two driving wheels 2 to drive the conveyor filter 3 to rotate, and the set conveyor filter 3 is used to filter the cuttings in the cutting fluid and transport the cuttings to the right for discharge;

[0025] A partition scraper assembly is fixedly connected between the bottom inner wall, the front inner wall and the rear inner wall of the water tank 102, and the partition scraper assembly is in active contact with the bottom right side of the conveyor belt filter 3, and the partition scraper assembly is used to scrape and clean the bottom of the conveyor belt filter 3; the right inner wall of the water tank 102 is set as an inclined surface, and a rectangular slag discharge pipe 12 is fixedly connected to the bottom right side of the water tank 102, and a backflush cleaning assembly located in the conveyor belt filter 3 is fixedly connected between the front inner wall and the rear inner wall of the water tank 102, and an auxiliary down-blowing slag discharge assembly located on the right side of the conveyor belt filter 3 is fixedly connected between the front inner wall and the rear inner wall of the water tank 102, and the front ends of the backflush cleaning assembly and the auxiliary down-blowing slag discharge assembly extend to the front side of the water tank 102, and an air pump 14 is fixedly installed on the front side of the water tank 102. The air outlet of the air pump 14 is connected and fixed with a connecting pipe 13, and the two ends of the connecting pipe 13 are respectively connected and fixed with one end close to the backblowing cleaning component and the auxiliary downward blowing slag discharge component. A slag receiving box 16 is arranged below the main body 1 of the vertical machining center, and the slag receiving box 16 is located below the rectangular slag discharge pipe 12. An inclined guide plate 15 located above the water tank 102 is fixedly connected to the right inner wall of the main body 1 of the vertical machining center, and the inclined guide plate 15 is inclined to the lower left. The air pump 14 and the connecting pipe 13 are used to supply air to the backblowing cleaning component and the auxiliary downward blowing slag discharge component. The backblowing cleaning component is used to backblow and clean the rotating conveyor belt filter 3 from the inside downward, and the auxiliary downward blowing slag discharge component is used to blow and discharge the cutting chips discharged to the right downward. The slag receiving box 16 is used to receive the cutting chips discharged from the rectangular slag discharge pipe 12.

[0026] Specifically, the support assembly includes a plurality of support rollers 5 rotatably installed between the front inner wall and the rear inner wall of the water tank 102 at equal intervals, wherein the front end and the rear end of the support roller 5 are fixedly connected with bearings, and a plurality of pins are fixedly connected to the front inner wall and the rear inner wall of the water tank 102, and the bearings are fixedly mounted on the outer sides of the corresponding pins, and the support roller 5 is rotatably installed between the front inner wall and the rear inner wall of the water tank 102 by means of two corresponding bearings and pins, which plays the effect of rotatably installing the support roller 5, and the top of the support roller 5 is in active contact with the inner top of the conveyor belt filter 3; the plurality of support rollers 5 arranged at even intervals are used to achieve the effect of stably supporting and preventing the inner top of the conveyor belt filter 3 from collapsing.

[0027] Furthermore, the separation and scraping assembly includes a partition 6 fixedly connected between the bottom inner wall, the front inner wall and the rear inner wall of the water tank 102, and a scraper 7 is fixedly connected to the top of the partition 6. The top of the scraper 7 is in active contact with the bottom right side of the conveyor belt filter 3, and the cutting fluid is located on the left side of the partition 6; the partition 6 and the scraper 7 are arranged to cooperate, the partition 6 is used to shield the cutting fluid, and the scraper 7 is used to scrape and clean the bottom of the conveyor belt filter 3 when it rotates.

[0028] Furthermore, the backblowing cleaning component includes a first circular tube 8 fixedly connected between the front inner wall and the rear inner wall of the water tank 102, the first circular tube 8 is located in the conveyor belt filter 3, and the right bottom of the first circular tube 8 is connected and fixed with a plurality of backblowing pipe heads 9 arranged downwardly inclined, the backblowing pipe head 9 cooperates with the inner bottom of the conveyor belt filter 3, the front end of the first circular tube 8 extends to the front side of the water tank 102 and is arranged to be a blocking structure, wherein a first through-hole fixedly connected to the outer side of the first circular tube 8 is opened on the front inner wall of the water tank 102, which plays the effect of allowing the first circular tube 8 to pass through and fix and support it, and the right inner wall of the first circular tube 8 is connected and fixed to the left end of the connecting pipe 13; the set first circular tube 8 and the backblowing pipe head 9 cooperate, and after the gas enters the first circular tube 8 through the connecting pipe 13, a plurality of backblowing pipe heads 9 are used to blow the gas downward to backblow and clean the rotating conveyor belt filter 3 from the inside downward.

[0029] Furthermore, the auxiliary downward blowing slag removal component includes a second circular tube 10 fixedly connected between the front inner wall and the rear inner wall of the water tank 102, the second circular tube 10 is located on the right side of the conveyor belt filter 3, and the bottom of the second circular tube 10 is connected and fixed with multiple downward blowing pipe heads 11, the front end of the second circular tube 10 extends to the front side of the water tank 102 and is arranged as a blocking structure, wherein a second outlet hole fixedly connected to the outer side of the second circular tube 10 is opened on the front inner wall of the water tank 102, which plays the effect of allowing the second circular tube 10 to pass through and fixing it, and the left inner wall of the second circular tube 10 is connected and fixed to the right end of the connecting pipe 13; the second circular tube 10 and the downward blowing pipe head 11 are arranged to cooperate, and after the gas enters the second circular tube 10 through the connecting pipe 13, it is blown downward through the downward blowing pipe head 11, and the cutting chips transported to the right by the conveyor belt filter 3 are blown downward and discharged, thereby achieving the effect of auxiliary blowing slag removal.

[0030] The method of using this embodiment is as follows: the cutting fluid and cutting chips in the vertical machining center body 1 during operation fall downward onto the conveyor filter 3, the cutting fluid passes downward through the conveyor filter 3 and enters the water tank 102, the conveyor filter 3 filters and intercepts the cutting chips in the cutting fluid at its top, thereby filtering the cutting fluid, wherein the drive motor 4 and the air pump 14 are turned on during the filtering operation, the drive motor 4 drives the left driving wheel 2 to rotate when it is started, the left driving wheel 2 drives the conveyor filter 3 and the right driving wheel 2 to rotate, the conveyor filter 3 transports and discharges the cutting chips to the right, and causes the cutting chips to fall into the part of the water tank 102 located on the right side of the partition 6, the cutting chips are discharged downward through the rectangular slag discharge pipe 12 to the external slag receiving box 16, thereby achieving the effect of automatically discharging the filtered cutting chips;

[0031] When the air pump 14 is started, air is supplied to the first circular tube 8 and the second circular tube 10 through the connecting pipe 13. The gas entering the first circular tube 8 is blown downwardly through a plurality of back-blowing pipe heads 9, so as to realize the back-blowing cleaning and dredging of the rotating conveyor-type filter 3 from the inside downward. The gas entering the second circular tube 10 is blown downwardly through the lower blowing pipe head 11, so as to realize the downward blowing of the cuttings discharged to the right side, and assist the cuttings to be discharged downward quickly. When the conveyor-type filter 3 rotates, its bottom will rub against the top of the scraper 7, so as to achieve the effect of scraping and cleaning the bottom of the conveyor-type filter 3. Through the cooperation of back-blowing cleaning and conveying from the inside downward, auxiliary blowing and slag removal downward, and scraping cleaning, it is convenient to automatically and timely clean the conveyor-type filter 3 effectively and quickly discharge slag. Through the automatic, timely and continuous cleaning and slag removal, the phenomenon of static accumulation of cuttings leading to blockage is avoided, the continuous stability of filtration is improved, and there is no need for manual internal slag cleaning, thereby improving the degree of cleaning automation.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A vertical machining center with a cutting fluid filtering function, comprising a vertical machining center body (1), a water tank (102) being embedded at the front bottom of the vertical machining center body (1), characterized in that: Two driving wheels (2) are rotatably connected between the front inner wall and the rear inner wall of the water tank (102); the two driving wheels (2) are drivingly connected to a same conveyor-type filter screen (3) in a taut state; a driving motor (4) fixedly connected to the front side of the left driving wheel (2) is fixedly mounted on the front side of the water tank (102); and a supporting assembly located inside the conveyor-type filter screen (3) is mounted between the front inner wall and the rear inner wall of the water tank (102); A partitioning and scraping assembly is fixedly connected between the bottom inner wall, the front inner wall and the rear inner wall of the water tank (102), and the partitioning and scraping assembly is in active contact with the bottom right side of the conveyor-type filter screen (3); The right inner wall of the water tank (102) is arranged as an inclined surface, a rectangular slag discharge pipe (12) is connected and fixedly connected to the right side of the bottom of the water tank (102), a back-blowing cleaning component located in the conveyor-type filter screen (3) is fixedly connected between the front inner wall and the rear inner wall of the water tank (102), an auxiliary downward blowing slag discharge component located on the right side of the conveyor-type filter screen (3) is fixedly connected between the front inner wall and the rear inner wall of the water tank (102), the front ends of the back-blowing cleaning component and the auxiliary downward blowing slag discharge component both extend to the front side of the water tank (102), an air pump (14) is fixedly installed on the front side of the water tank (102), the air outlet of the air pump (14) is connected and fixedly connected to a connecting pipe (13), and both ends of the connecting pipe (13) are respectively connected and fixedly connected to one end of the back-blowing cleaning component and the auxiliary downward blowing slag discharge component that are close to each other.

2. A vertical machining center with cutting fluid filtering function according to claim 1, characterized in that: The support assembly comprises a plurality of support rollers (5) rotatably mounted at equal intervals between the front inner wall and the rear inner wall of the water tank (102), the tops of the support rollers (5) being in active contact with the inner top of the conveyor-type filter screen (3).

3. A vertical machining center with cutting fluid filtering function according to claim 2, characterized in that: The partitioning and scraping assembly comprises a partition (6) fixedly connected between the bottom inner wall, the front inner wall and the rear inner wall of the water tank (102); a scraper (7) is fixedly connected to the top of the partition (6); and the top of the scraper (7) is in active contact with the bottom right side of the conveyor-type filter screen (3).

4. A vertical machining center with cutting fluid filtering function according to claim 3, characterized in that: The backflush cleaning assembly comprises a first circular tube (8) fixedly connected between the front inner wall and the rear inner wall of the water tank (102); the first circular tube (8) is located in the conveyor-type filter screen (3); a plurality of backflush pipe heads (9) arranged downwardly inclined are connected and fixed to the right bottom of the first circular tube (8); the backflush pipe heads (9) cooperate with the inner bottom of the conveyor-type filter screen (3); the front end of the first circular tube (8) extends to the front side of the water tank (102) and is arranged as a blocking structure; the right inner wall of the first circular tube (8) is connected and fixed to the left end of the connecting pipe (13).

5. A vertical machining center with cutting fluid filtering function according to claim 4, characterized in that: The auxiliary downward blowing slag removal component comprises a second circular tube (10) fixedly connected between the front inner wall and the rear inner wall of the water tank (102); the second circular tube (10) is located on the right side of the conveyor belt filter (3); a plurality of downward blowing pipe heads (11) are connected and fixed to the bottom of the second circular tube (10); the front end of the second circular tube (10) extends to the front side of the water tank (102) and is configured as a blocking structure; the left inner wall of the second circular tube (10) is connected and fixed to the right end of the connecting pipe (13).

6. A vertical machining center with cutting fluid filtering function according to claim 3, characterized in that: The front bottom of the vertical machining center body (1) is provided with an embedding hole (101) fixedly connected to the outside of the water tank (102); the water tank (102) is filled with cutting fluid located below the conveyor-type filter screen (3); and the cutting fluid is located on the left side of the partition (6).

7. A vertical machining center with cutting fluid filtering function according to claim 1, characterized in that: The four corners of the bottom of the vertical machining center body (1) are fixedly connected to supporting feet, a slag receiving box (16) is arranged below the vertical machining center body (1), and the slag receiving box (16) is located below the rectangular slag discharge pipe (12). An inclined guide plate (15) located above the water tank (102) is fixedly connected to the right inner wall of the vertical machining center body (1), and the inclined guide plate (15) is arranged to be inclined to the lower left.

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