Electromagnetic fusion cutting device for circular plastic base cloth

Abstract

The utility model belongs to the technical field of electromagnetic heating fusion cutting of plastic base cloth, and discloses an electromagnetic fusion cutting device of round plastic base cloth, which is characterized in that bakelite is arranged at the bottom of a heat-resisting plate in a front-back symmetry manner, and wraps an electromagnetic induction coil; the electromagnetic induction cylinder is fixedly arranged at the bottom of the telescopic rod; the upper part of the electromagnetic induction cylinder is fixedly connected with the bottom of the telescopic rod; the supporting sliding grooves are symmetrically arranged around the bottom of the electromagnetic induction cylinder in a cross shape, and the positioning sliding bodies are installed in the supporting sliding grooves and freely move along the supporting sliding grooves. The fixing blocks are in a T shape, the fixing blocks are symmetrically arranged around the upper portion of the fusion cutter in a cross shape, the fixing blocks are fixedly installed at the bottom of the positioning sliding body, and the fusion cutter is in a circular ring shape. The round plastic base cloth fusion cutting device has the beneficial effects that the fusion cutting efficiency of round plastic base cloth is improved, the technical problem that burrs are easy to generate when the round plastic base cloth is cut is completely eradicated, and the fusion cutting precision of the round plastic base cloth is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electromagnetic heating melting and cutting of plastic base cloth, and in particular relates to an electromagnetic melting and cutting device for circular plastic base cloth. Background Art

[0002] Container bags (flexible transport guarantee containers), also known as ton bags or ton bags. Container bags are widely used for the transportation and packaging of powdered, granular, and blocky items such as food, grains, medicines, chemicals, and minerals. Container bags are usually made of cylindrical plastic base cloth, upper cover, lower cover, feed port, slings, and reinforcing ribs. Because the middle part of the container bag is a cylindrical plastic base cloth, the upper cover, lower cover, and feed port need to cut the strip of plastic base cloth into a circle as the upper cover or lower cover or feed port of the container bag. When sewing the container bag, the upper cover, lower cover, and feed port are mainly combined with the cylindrical plastic base cloth for sewing. At the same time, reinforcing ribs and slings are sewn on the outside of the cylindrical plastic base cloth to facilitate the lifting and transportation of the container bag.

[0003] In the prior art, the upper cover, lower cover and feed port of the container bag are cut by a cutting knife. The main technical problems of using a cutting knife to cut the circular upper cover, lower cover and feed port are: the edges of the circular upper cover, lower cover and feed port are prone to burrs, which in turn causes the plastic base cloth of the circular upper cover, lower cover and feed port to deflocculate; at the same time, the cutting efficiency is low and the cutting accuracy cannot be guaranteed. Based on the above defects in the prior art, the inventor has developed an electromagnetic melting cutting device for circular plastic base cloth, which can well solve the above technical problems existing in the prior art. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an electromagnetic melting cutting device for a circular plastic base cloth, which has a simple and scientifically reasonable design structure and realizes efficient melting cutting of a circular upper cover, a lower cover and a feed inlet. The utility model can solve the technical problem that burrs are easily generated when a cutting knife is used to cut a circular upper cover, a lower cover and a feed inlet, and also solves the problem that the cutting efficiency is low and the cutting precision is not high when cutting a circular upper cover, a lower cover and a feed inlet.

[0005] The technical solution adopted by the utility model to solve the technical problem is: an electromagnetic melting and cutting device for a circular plastic base cloth, comprising a bracket, a telescopic support plate and a pneumatic push rod, the bracket is U-shaped, and the bracket is fixedly arranged on both sides of a frame of a plastic base cloth conveying device; the telescopic support plate is fixedly arranged at the upper middle position of the bracket, the telescopic support plate is L-shaped, and the telescopic support plate is used to fix and install the pneumatic push rod; the pneumatic push rod is fixedly arranged at the upper center position of the telescopic support plate, and the telescopic rod of the pneumatic push rod passes through the telescopic support plate and extends to the lower position of the telescopic support plate; the fixed plate is fixedly arranged at the middle bottom position of the bracket, the front side of the fixed plate is fixedly arranged with an insulating plate, the heat-resistant plate is fixedly arranged at the bottom front side position of the insulating plate, the positive electrode line end and the negative electrode line end are symmetrically arranged on the front side of the insulating plate, and the support columns are symmetrically arranged on the left and right sides. The electromagnetic induction coil is located between the heat-resistant plate and the telescopic support plate; the electromagnetic induction coil is a spiral cylindrical shape, one end of the electromagnetic induction coil is fixedly connected to the positive electrode line end, and the other end is fixedly connected to the negative electrode line end; the guide hole is arranged at the center of the heat-resistant plate; the insulating bakelite is symmetrically arranged at the bottom of the heat-resistant plate, and the insulating bakelite wraps the electromagnetic induction coil; the electromagnetic induction tube is fixedly arranged at the bottom of the telescopic rod, and the upper part of the electromagnetic induction tube is fixedly connected to the bottom of the telescopic rod; the supporting sliding groove is symmetrically arranged in a cross shape around the bottom of the electromagnetic induction tube, and the positioning sliding body is installed in the supporting sliding groove, and the positioning sliding body moves freely along the supporting sliding groove; the fixed block is T-shaped, and the fixed block is symmetrically arranged in a cross shape around the upper part of the melting knife, and the fixed block is fixedly installed at the bottom of the positioning sliding body, and the melting knife is annular.

[0006] The pneumatic push rod is fixedly connected with the electromagnetic valve and the air source through an air pipe, and the maximum extension stroke of the pneumatic push rod makes the melting cutter contact with the plastic base cloth of the plastic base cloth conveying device.

[0007] The lower end of the support column is fixedly connected to the upper part of the heat-resistant plate, and the upper end of the support column is fixedly connected to the bottom of the telescopic support plate.

[0008] The positive electrode terminal and the negative electrode terminal are fixedly connected to the insulating plate through nuts, and the positive electrode terminal and the negative electrode terminal are fixedly connected to the control switch and the high-frequency power supply through wires.

[0009] The diameter of the guide hole is larger than the diameter of the electromagnetic induction tube.

[0010] The insulating bakelite is L-shaped, and the electromagnetic induction coil is arranged at the center of the insulating bakelite which is symmetrically arranged front and back.

[0011] The supporting sliding groove includes a sliding groove body, which is in the shape of a square strip. The lateral grooves are opened on the front and rear sides of the sliding groove body, and the lateral grooves are grooves passing through the sliding groove body; the central groove is opened in the middle position of the bottom of the sliding groove body, and the length of the central groove is less than the length of the sliding groove body.

[0012] The positioning sliding body includes a transverse screw, which is installed in the lateral groove. External threads are provided at both ends of the transverse screw. Positioning nuts are tightened and installed at the front and rear ends of the transverse screw, and the positioning nuts are tightly attached to the outer side surfaces of the lateral grooves. The connecting block is fixedly arranged in the middle position of the bottom of the transverse screw. A fixing groove is provided at the bottom of the connecting block. The fixing pin is a cylindrical shape with a cover at one end. An external thread is provided at the front end of the fixing pin. The fixing pin passes through the front and rear ends of the fixing groove and is fixed by fixing nuts.

[0013] The upper part of the fixing block is provided with a mounting hole, and the fixing block is correspondingly mounted in the fixing groove. The fixing pin passes through the mounting hole on the upper part of the fixing block and the front and rear ends of the fixing groove, and the fixing nut is tightened and mounted at the front end position of the fixing pin.

[0014] The use process of this electromagnetic heating melting and cutting device for circular plastic base cloth is as follows: first, the bracket 1 is fixedly installed on both sides of the frame of the plastic base cloth conveying device, and then according to the process diameter of the circular upper cover or lower cover or the feed port (circular plastic base cloth), a melting cutter of corresponding diameter is selected, and the four fixed blocks on the melting cutter are correspondingly installed in the bottom fixed groove of the positioning sliding body connecting block in the lateral grooves of the four supporting sliding grooves, and the fixing pins are respectively passed through the mounting holes of the fixing blocks and the fixing groove body, and finally, the fixing nuts are tightened to install the front ends of the fixing pins, so that the melting cutter is fixedly installed on the four positioning sliding bodies at the bottom of the four supporting sliding grooves; at the same time, according to the diameter of the melting cutter, the position of the positioning sliding body on the supporting sliding groove is adjusted, and when the fixed block on the melting cutter is vertically connected to the positioning sliding body, the positioning sliding body is fixed by tightening the positioning nut. The melting and cutting process of the circular plastic base cloth (circular upper cover or lower cover or feed port): As the plastic base cloth conveying device is running, the operator starts the pneumatic push rod and turns on the control switch of the high-frequency power supply at the same time, and the electromagnetic induction coil starts to work; then the telescopic rod of the pneumatic push rod starts to extend, pushing the electromagnetic induction tube to move downward through the guide hole and the electromagnetic induction coil (in the process of the electromagnetic induction tube moving downward, when the electromagnetic induction tube passes the position of the electromagnetic induction coil, the electromagnetic induction coil instantly heats the electromagnetic induction tube, and the high temperature heat of the electromagnetic induction tube is transferred to the melting cutter by heat conduction). When the telescopic rod is extended, When it reaches the maximum stroke, the melting knife just contacts the plastic base cloth on the plastic base cloth conveying device, thereby realizing the melting and cutting operation of the plastic base cloth. Finally, the melt-cut circular plastic base cloth is manually picked up quickly from the conveying device and placed neatly. After a circular plastic base cloth is melt-cut, as the plastic base cloth conveying device continues to operate, the retraction time of the telescopic rod of the pneumatic push rod matches the operating speed of the plastic base cloth conveying device, just staggering the melt-cut plastic base cloth (staggering the plastic base cloth with a circular hole left after melting and cutting), and the telescopic rod of the pneumatic push rod extends again to complete the re-melting and cutting operation of the circular plastic base cloth.

[0015] The beneficial effects of the utility model are as follows: through the coordinated arrangement of the pneumatic push rod, the telescopic rod, the electromagnetic induction coil, the electromagnetic induction tube, the supporting sliding groove, the positioning sliding body, the fixed block and the melting cutting knife, the melting and cutting efficiency of the circular plastic base cloth is improved, the technical problem of easily generating burrs when cutting the circular plastic base cloth is eliminated, and the melting and cutting accuracy of the circular plastic base cloth is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 For this utility model Figure 1 A partial enlarged view of point A;

[0018] Figure 3 This is a schematic diagram of the structure of the electromagnetic induction tube, the supporting sliding groove, the positioning sliding body, and the melting cutter of the utility model;

[0019] Figure 4 For this utility model Figure 3 A partial enlarged view of point B;

[0020] Markings in the figure: 1. bracket, 2. telescopic support plate, 3. pneumatic push rod, 4. telescopic rod, 5. support column, 6. fixed plate, 7. insulating plate, 8. positive wire end, 9. negative wire end, 10. electromagnetic induction coil, 11. heat-resistant plate, 12. guide hole, 13. insulating bakelite, 14. electromagnetic induction tube, 15. support sliding groove, 151. sliding groove body, 152. lateral groove, 153. center groove, 16. positioning sliding body, 161. transverse screw, 162. positioning nut, 163. connecting block, 164. fixing groove, 165. fixing pin, 166. fixing nut, 17. fixing block, 18. melting knife. DETAILED DESCRIPTION

[0021] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0022] The utility model provides an electromagnetic melting and cutting device for a circular plastic base cloth:

[0023] like Figure 1As shown, the bracket 1 is U-shaped, and the bracket 1 is fixedly arranged on both sides of the frame of the plastic base cloth conveying device; the above-mentioned arrangement of the bracket 1, on the one hand, provides installation support for the pneumatic push rod 3 and the telescopic rod 4; on the other hand, through the coordination of the height of the bracket 1 and the maximum extension stroke of the telescopic rod 4, when the telescopic rod 4 is in the maximum extension stroke, the sum of the height of the telescopic rod 4, the height of the electromagnetic induction tube 14, the height of the support sliding groove 15, the height of the positioning sliding body 16, the height of the fixed block 17 and the height of the melting knife 18 is equal to the height of the plastic base cloth when the telescopic rod 4 is in the retracted state, so that the melting knife 18 is in contact with the plastic base cloth.

[0024] like Figure 1 or Figure 2 As shown, the fixing plate 6 is fixedly arranged at the middle bottom position of the bracket 1, the insulating plate 7 is fixedly arranged on the front side of the fixing plate 6, the heat-resistant plate 11 is fixedly arranged at the bottom front side position of the insulating plate 7, the positive electrode terminal 8 and the negative electrode terminal 9 are symmetrically arranged on the front side of the insulating plate 7, and the support column 5 is symmetrically arranged between the heat-resistant plate 11 and the telescopic support plate 2. The above setting of the fixing plate 6 provides a fixed connection for the insulating plate 7 and the heat-resistant plate 11. The above setting of the positive electrode terminal 8 and the negative electrode terminal 9, on the one hand, provides a stable support for the electromagnetic induction coil 10, and on the other hand, plays a role in connecting the high-frequency power supply to the electromagnetic induction coil 10, so that the electromagnetic induction coil 10 generates a high-frequency magnetic field.

[0025] like Figure 1 As shown in Figure 2, the support column 5 is symmetrically arranged between the heat-resistant plate 11 and the telescopic support plate 2; the lower end of the support column 5 is fixedly connected to the upper part of the heat-resistant plate 11, and the upper end of the support column 5 is fixedly connected to the bottom of the telescopic support plate 2. Through the arrangement of the support column 5, the heat-resistant plate 11 and the telescopic support plate 2 are fixedly connected to form an integral structure, which improves the stability of the electromagnetic induction tube 14 during the up and down movement.

[0026] like Figure 1 As shown, the electromagnetic induction coil 10 is a spiral cylindrical shape, one end of the electromagnetic induction coil 10 is fixedly connected to the positive electrode line terminal 8, and the other end is fixedly connected to the negative electrode line terminal 9; the insulating bakelite 13 is L-shaped, and the electromagnetic induction coil 10 is arranged at the center of the insulating bakelite 13 arranged in front and back contrast. The above-mentioned electromagnetic induction coil 10 is arranged to generate a high-frequency electromagnetic field, and at the same time, with the cooperation of the metal electromagnetic induction tube 14, the electromagnetic induction tube 14 and the melting knife 18 are instantly heated.

[0027] like Figure 1 or Figure 2 As shown, the insulating bakelite 13 is symmetrically arranged at the bottom of the heat-resistant plate 11, and the insulating bakelite 13 wraps the electromagnetic induction coil 10. The above-mentioned insulating bakelite 13 plays an insulating role.

[0028] like Figure 1 or Figure 2 As shown, the diameter of the central hole of the electromagnetic induction coil 10 is larger than the diameter of the electromagnetic induction tube 14 , and a gap is reserved between the electromagnetic induction coil 10 and the electromagnetic induction tube 14 .

[0029] like Figure 3 As shown in Figure 4, the support sliding groove 15 is symmetrically arranged in a cross shape around the bottom of the electromagnetic induction tube 14, and the positioning sliding body 16 is installed in the support sliding groove 15. The positioning sliding body 16 moves freely along the support sliding groove 15; the fixed block 17 is T-shaped, and the fixed block 17 is symmetrically arranged in a cross shape around the upper part of the melting knife 18. The fixed block 17 is fixedly installed at the bottom of the positioning sliding body 16, and the melting knife 18 is annular. The above-mentioned setting of the support sliding groove 15, on the one hand, provides a fixed support function for the installation of the positioning sliding body 16, and on the other hand, it can realize the sliding adjustment of the positioning sliding body 16 on the support sliding groove 15, which plays a guiding role in the sliding adjustment of the position of the positioning sliding body 16.

[0030] like Figure 3 As shown in FIG. 4, the positioning sliding body 16 includes a transverse screw 161, which is installed in the lateral groove 152. Both ends of the transverse screw 161 are provided with external threads. The positioning nuts 162 are tightened and installed at the front and rear ends of the transverse screw 161. The positioning nuts 162 are tightly attached to the outer side of the lateral groove 152. The connecting block 163 is fixedly arranged at the middle position of the bottom of the transverse screw 161. The bottom of the connecting block 163 is provided with a fixing groove 164. The fixing pin 165 is a cylindrical shape with a cover at one end. The front end of the fixing pin 165 is provided with external threads. The fixing pin 165 passes through the front and rear ends of the fixing groove 164 and is fixed by the fixing nut 166. Through the arrangement of the transverse screw 161 and the positioning nut 162, the connecting block 163 can be positioned to a suitable position (which is adapted to the diameter of the melting cutter 19 at this time) by using the positioning nut 162 to cooperate and tighten with the two ends of the transverse screw 161. The above-mentioned coordination arrangement of the fixing groove 164 , the fixing pin 165 and the fixing nut 166 mainly plays the role of fixing the connection with the fixing block 17 on the melting cutter 18 .

[0031] like Figure 3 or Figure 4 As shown, a mounting hole is provided on the upper portion of the fixing block 17, and the fixing block 17 is correspondingly mounted in the fixing groove 164. The fixing pin 165 passes through the mounting hole on the upper portion of the fixing block 17 and the front and rear ends of the fixing groove 164, and the fixing nut 166 is tightened and mounted at the front end of the fixing pin 165. Through the above-mentioned setting of the fixing block 17 and the mounting hole, the fixing block 17 (melting cutter 18) can be fixedly connected to the connection block 163 of the positioning slide body 16.

[0032] like Figure 1-4 As shown, the use process of the electromagnetic heating melting and cutting device of the circular plastic base cloth is as follows: first, the bracket 1 is fixedly installed on both sides of the frame of the plastic base cloth conveying device, and then according to the process diameter of the circular upper cover or lower cover or the feed port (circular plastic base cloth), the corresponding diameter of the melting cutter 18 is selected, and the four fixed blocks 17 on the melting cutter 18 are correspondingly installed in the bottom fixed groove 164 of the connecting block 163 of the positioning sliding body 16 in the lateral groove 152 of the four supporting sliding grooves 15, and the fixing pins 165 are respectively passed through the mounting holes of the fixing blocks 17 and the fixing groove 164 body, and finally the fixing nuts 166 are tightened to the front ends of the fixing pins 165, so that the melting cutter 18 is fixedly installed on the four positioning sliding bodies 16 at the bottom of the four supporting sliding grooves 15; at the same time, according to the diameter of the melting cutter 18, the position of the positioning sliding body 16 on the supporting sliding groove 15 is adjusted, and when the fixed block 17 on the melting cutter 18 is vertically connected to the positioning sliding body 16, the positioning sliding body 16 is fixed by tightening the positioning nuts 162. The melting and cutting process of the circular plastic base cloth (circular upper cover or lower cover or feed port): As the plastic base cloth conveying device is running, the operator starts the pneumatic push rod 3 and turns on the control switch of the high-frequency power supply at the same time, and the electromagnetic induction coil 10 starts to work; then the telescopic rod 4 of the pneumatic push rod 3 starts to extend, pushing the electromagnetic induction tube 14 to pass through the guide hole 12 and the electromagnetic induction coil 10 to move downward (in the process of the electromagnetic induction tube 14 moving downward, when the electromagnetic induction tube 14 passes the position of the electromagnetic induction coil 10, the electromagnetic induction coil 10 instantly heats the electromagnetic induction tube 14, and the high temperature heat of the electromagnetic induction tube 14 is transferred to the melting cutter 1 by heat conduction 8), when the telescopic rod 4 is extended to the maximum stroke, the melting knife 18 just contacts the plastic base cloth on the plastic base cloth conveying device, thereby realizing the melting and cutting operation of the plastic base cloth, and finally manually picking up the melt-cut circular plastic base cloth from the conveying device quickly and placing it neatly; after a circular plastic base cloth is melt-cut, as the plastic base cloth conveying device continues to operate, the retraction time of the telescopic rod 4 of the pneumatic push rod 3 matches the operating speed of the plastic base cloth conveying device, just staggering the melt-cut plastic base cloth (staggering the plastic base cloth with a circular hole left after melting and cutting), and the pneumatic push rod 3 and telescopic rod 4 extend again to complete the re-melting and cutting operation of the circular plastic base cloth.

[0033] Various modifications to the above embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electromagnetic melting device for a circular plastic base cloth, comprising a bracket, a telescopic support plate and a pneumatic push rod, wherein the bracket is U-shaped and fixedly arranged on both sides of a frame of a plastic base cloth conveying device; the telescopic support plate is fixedly arranged at the middle position of the upper part of the bracket, the telescopic support plate is L-shaped, and the telescopic support plate is used to fix and install the pneumatic push rod; characterized in that: The pneumatic push rod is fixedly arranged at the upper center position of the telescopic support plate, and the telescopic rod of the pneumatic push rod passes through the telescopic support plate and extends to the lower position of the telescopic support plate; the fixed plate is fixedly arranged at the middle bottom position of the bracket, and an insulating plate is fixedly arranged on the front side of the fixed plate, and a heat-resistant plate is fixedly arranged at the bottom front side position of the insulating plate, and the positive electrode line end and the negative electrode line end are symmetrically arranged on the front side of the insulating plate, and the support column is symmetrically arranged between the heat-resistant plate and the telescopic support plate; the electromagnetic induction coil is a spiral cylindrical shape, and one end of the electromagnetic induction coil is fixedly connected to the positive electrode line end, and the other end is fixedly connected to the negative electrode line end; the guide A hole is opened at the center of the heat-resistant plate; the insulating bakelite is symmetrically arranged at the bottom of the heat-resistant plate, and the insulating bakelite wraps the electromagnetic induction coil; the electromagnetic induction tube is fixedly arranged at the bottom of the telescopic rod, and the upper part of the electromagnetic induction tube is fixedly connected to the bottom of the telescopic rod; the supporting sliding groove is symmetrically arranged in a cross shape around the bottom of the electromagnetic induction tube, and the positioning sliding body is installed in the supporting sliding groove, and the positioning sliding body moves freely along the supporting sliding groove; the fixed block is T-shaped, and the fixed block is symmetrically arranged in a cross shape around the upper part of the melting cutter, and the fixed block is fixedly installed at the bottom of the positioning sliding body, and the melting cutter is annular.

2. The electromagnetic melting cutting device for a circular plastic base cloth according to claim 1 is characterized in that: The lower end of the support column is fixedly connected to the upper part of the heat-resistant plate, and the upper end of the support column is fixedly connected to the bottom of the telescopic support plate.

3. The electromagnetic melting cutting device for a circular plastic base cloth according to claim 1 is characterized in that: The positive electrode terminal and the negative electrode terminal are fixedly connected to the insulating plate through nuts, and the positive electrode terminal and the negative electrode terminal are fixedly connected to the control switch and the high-frequency power supply through wires.

4. The electromagnetic melting cutting device for a circular plastic base cloth according to claim 1, characterized in that: The insulating bakelite is L-shaped, and the electromagnetic induction coil is arranged at the center of the insulating bakelite which is symmetrically arranged front and back.

5. The electromagnetic melting cutting device for a circular plastic base cloth according to claim 1, characterized in that: The supporting sliding groove includes a sliding groove body, which is in the shape of a square strip. The lateral grooves are opened on the front and rear sides of the sliding groove body, and the lateral grooves are grooves passing through the sliding groove body; the central groove is opened in the middle position of the bottom of the sliding groove body, and the length of the central groove is less than the length of the sliding groove body.

6. The electromagnetic melting cutting device for a circular plastic base cloth according to claim 1, characterized in that: The positioning sliding body includes a transverse screw, which is installed in the lateral groove. External threads are provided at both ends of the transverse screw. Positioning nuts are tightened and installed at the front and rear ends of the transverse screw, and the positioning nuts are tightly attached to the outer side surfaces of the lateral grooves. The connecting block is fixedly arranged in the middle position of the bottom of the transverse screw. A fixing groove is provided at the bottom of the connecting block. The fixing pin is a cylindrical shape with a cover at one end. An external thread is provided at the front end of the fixing pin. The fixing pin passes through the front and rear ends of the fixing groove and is fixed by fixing nuts.

7. The electromagnetic melting cutting device for a circular plastic base cloth according to claim 5 or 6, characterized in that: The upper part of the fixing block is provided with a mounting hole, and the fixing block is correspondingly mounted in the fixing groove. The fixing pin passes through the mounting hole on the upper part of the fixing block and the front and rear ends of the fixing groove, and the fixing nut is tightened and mounted at the front end position of the fixing pin.

Images