Field training device suitable for javelin throwing practice

Abstract

The invention provides a field training device suitable for javelin throwing practice, which comprises portal frames, the portal frames are symmetrically arranged, the portal frames are fixedly connected through a plurality of connecting frames, each portal frame comprises two symmetrical main body stand columns, the main body stand columns are fixedly connected through two groups of portal trusses, and the two groups of portal trusses are arranged on the main body stand columns. The surface of the main body stand column is movably sleeved with a stand column sliding sleeve. The traction shoulder turning mechanism and the throwing mechanism are arranged at the two ends of the portal frame, trunk training and throwing training can be conducted respectively, multiple persons can be contained for training at the same time, the training types of the training equipment are increased, and multi-type training does not interfere with one another.

Description

Technical Field

[0001] The invention belongs to the field of sports training, in particular to a field training device suitable for javelin throwing practice. Background Art

[0002] Throwing sports are short-duration, highly technical, based on absolute strength, centered on speed, and require extremely high explosive power. Javelin is an anti-joint force event, so during training, it is necessary to strengthen the trunk force sequence and throwing ability. When training the trunk force sequence, it is usually practiced in a kneeling position with a full bow with a rubber band, with the arms relaxed, and the force sequence improved from the hips, waist, abdomen, upper limbs to the arms from bottom to top. It is also necessary to practice throwing in situ. Multiple throwing in situ is to be able to exert force and strength when running and throwing the gun, to prevent poor stability and unstable gun control when running and throwing the gun; At present, when conducting on-the-spot throwing training, if javelin throwing is used directly, the safe range of the javelin throwing venue needs to be isolated. In addition, multiple on-the-spot throwing, with the javelin directly inserted into the ground, will also cause direct damage to the javelin training venue. The subsequent maintenance cost is high, and it will also affect the use of the venue. During training, trunk training and throwing training are usually carried out separately, and different training equipment is required to increase the scope of the training venue.

[0003] In summary, the present invention provides a field training device suitable for javelin throwing practice to solve the above problems. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a field training device suitable for javelin throwing practice, so as to solve the problems in the prior art that the javelin is inserted into the ground, which will cause direct damage to the javelin training field, the subsequent maintenance cost is high, and the use of the field will be affected.

[0005] A field training device suitable for javelin throwing practice, comprising: The gantry frames are symmetrically arranged, the gantry frames are fixedly connected by a plurality of connecting frames, the gantry frames include two symmetrical main columns, the main columns are fixedly connected by two groups of gantry trusses, and the surfaces of the main columns are movably sleeved with column sliding sleeves; The throwing mechanism comprises a column base, a remote column and a side plate are fixedly connected to the column base, a lifting screw is movably connected to one end of the remote column, an end of the lifting screw is fixedly connected to an end block, a plug rod is movably arranged in the side plate, and an end slot is provided in the end block; Steel rope winding mechanism, both ends of the steel rope winding mechanism are connected to the column sliding sleeves on the same side of two gantry frames, a throwing steel rope is arranged between the steel rope winding mechanism and the throwing mechanism, and a throwing cylinder is sleeved on the surface of the throwing steel rope; Traction and shoulder turning mechanism, the traction and shoulder turning mechanism includes a counterweight disk, a traction frame is installed on the counterweight disk, a traction pull plate is arranged directly above the traction frame, the traction pull plate and the traction frame are fixedly connected by a turnbuckle, a traction rope is fixedly connected to the surface of the traction pull plate, and the other end of the traction rope is fixedly connected to a pull ring.

[0006] Furthermore, a plurality of pin holes are equidistantly arranged on the main body column, corresponding through holes are arranged on the column sliding sleeve, a pin is arranged on one side of the column sliding sleeve, and the pin respectively passes through the through hole and the pin hole.

[0007] Furthermore, extension legs are respectively installed on one side of the bottom of the main body column, sleeve rods are respectively fixedly connected to two of the extension legs, an installation bottom block is fixedly connected to the bottom of the main body column, and an installation hole is arranged on the installation bottom block.

[0008] Furthermore, one end of the lifting screw rod is movably inserted into the remote column, the end of the remote column far from the column base is rotatably connected with a rotating sleeve, the rotating sleeve is in threaded connection with the lifting screw rod, a limiting rod is vertically connected to the bottom of the end block, one end of the limiting rod movably penetrates through the side plate and is arranged parallel to the remote column, and a sleeve rod hole is arranged on the column base.

[0009] Furthermore, a plug rod groove is arranged on the side plate, a sliding pedal is installed in the plug rod groove, a plug rod is fixedly connected to the bottom of the sliding pedal, and one end of the plug rod movably penetrates through the side plate.

[0010] Furthermore, the steel rope winding mechanism includes a positioning shaft, both ends of the positioning shaft are respectively fixedly connected to the surfaces of two of the column sliding sleeves through positioning blocks, a winding roller is rotatably sleeved on the surface of the positioning shaft, a plugging sleeve is arranged at one end of the winding roller, a positioning plate is also fixedly sleeved on the surface of the positioning shaft, one end of the plugging sleeve is arranged on one side of the winding roller, and the other end is slidably arranged on the surface of the positioning plate. A tension spring is connected between the inner wall of the plugging sleeve and the winding roller. A jack is arranged at the end of the winding roller close to the plugging sleeve, and a plug block is correspondingly installed on the plugging sleeve.

[0011] Furthermore, one end of the throwing steel rope is fixedly connected with a steel rope top block, the steel rope top block is movably inserted into the end groove, and the other end of the throwing steel rope is wound on the surface of the winding roller.

[0012] Further, a directional rod is connected between the two gantry trusses of the gantry, and the directional rod respectively passes through the counterweight plate and the traction pull plate movably.

[0013] Further, a guide frame is installed on the gantry truss at the top of the gantry. The guide frame includes an outer frame, and a first guide pulley and a second guide pulley are installed inside the outer frame. One end of the traction rope is fixedly connected to the middle of the traction pull plate, and the other end passes through the gantry truss movably and is in sliding contact with the first guide pulley and the second guide pulley. The handle ring is arranged on one side of the main body column.

[0014] Further, a traction pulley frame is installed on two of the column sleeves. The traction pulley frame is provided with two groups of traction pulleys, and the traction rope is wound around the surface of the traction pulley in an "S" shape.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By arranging a traction shoulder-turning mechanism and a throwing mechanism at both ends of the gantry, the present invention can respectively perform torso training and throwing training, can accommodate multiple people for training at the same time, increases the training types of the training equipment, and various types of training do not interfere with each other.

[0016] 2. By arranging a movable throwing mechanism, the present invention can realize directional throwing training without damaging the ground, and the height of the throwing mechanism and the length of the throwing line are both adjustable, and can be adjusted more flexibly according to different training populations. Moreover, the throwing mechanism can also be stored on one side of the gantry, reducing the floor area of the training device.

[0017] 3. By arranging a traction shoulder-turning mechanism, the increase or decrease of the counterweight can be adjusted according to the training intensity and acceptance degree, and with the connection of the turnbuckle, the height of the handle ring can also be adjusted according to the height of the training object at the same time, with higher adaptability and more targeted training.

[0018] The above related descriptions of the invention content are only an overview of the technical solution of this application. In order to enable those of ordinary skill in the art to understand the technical solution of this application more clearly, and then can be implemented according to the content recorded in the description and the drawings, and in order to make the above objects, other objects, features and advantages of this application more easily understood, the following is described in conjunction with the specific implementation manners and drawings of this application. Description of the Drawings

[0019] The drawings are only used to show the principles, implementation manners, applications, features and effects of the specific implementation manners and other related contents of this application, and should not be regarded as a limitation to this application.

[0020] In the accompanying drawings of the specification: Figure 1It is the perspective view of the throwing mechanism of the present invention when deployed; Figure 2 It is the perspective view of the throwing mechanism of the present invention when stored; Figure 3 It is the perspective view of the throwing mechanism of the present invention; Figure 4 It is the perspective view of the traction pulley frame of the present invention; Figure 5 It is the perspective view of the gantry of the present invention; Figure 6 It is the perspective view of the steel rope winding structure of the present invention.

[0021] The reference numerals involved in the above-mentioned various drawings are explained as follows: 1. Gantry; 101. Main body column; 102. Extended support leg; 103. Sleeve rod; 104. Installation base block; 105. Pin hole; 106. Gantry truss; 2. Throwing mechanism; 201. Column base; 202. Remote column; 203. Side plate; 204. Limiting rod; 205. Lifting screw rod; 206. End block; 207. End groove; 208. Rotating sleeve; 209. Inserting rod; 3. Traction turning shoulder mechanism; 301. Counterweight plate; 302. Traction frame; 303. Directional rod; 304. Turnbuckle; 305. Traction rope; 306. Pulling ring; 307. Traction pulling plate; 4. Connecting frame; 5. Traction pulley frame; 6. Column sliding sleeve; 7. Guide frame; 701. Outer frame; 702. Guide pulley one; 703. Guide pulley two; 8. Throwing steel rope; 9. Steel rope winding mechanism; 901. Positioning shaft; 902. Positioning block; 903. Winding roller; 904. Tension spring; 905. Inserting sleeve; 906. Positioning plate; 907. Inserting hole; 10. Pin; 11. Throwing tube; 12. Steel rope top block. Detailed implementation manners

[0022] To illustrate in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects, etc. of the present application, the following is detailed in conjunction with the listed specific embodiments and accompanied by the drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, so they are only used as examples and cannot be used to limit the protection scope of the present application.

[0023] Reference to "embodiment" in this document means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of this application. The term "embodiment" that appears in various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0024] Unless otherwise defined, the meanings of the technical terms used in this document are the same as those commonly understood by those skilled in the technical field to which this application belongs; the use of the relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0025] In the description of this application, the phrase "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships. For example, A and / or B means: the existence of A, the existence of B, and the simultaneous existence of A and B. In addition, the character " / " in this document generally represents an "or" logical relationship between the associated objects before and after.

[0026] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary-secondary, or sequential relationship between these entities or operations.

[0027] Without further limitation, in this application, the open-ended expressions such as "comprising", "including", "having", or other similar expressions used in a statement are intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method, or product that includes the said elements. Thus, a process, method, or product that includes a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such a process, method, or product.

[0028] Similar to the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding", etc. are understood not to include the number itself; expressions such as "above", "below", "within", etc. are understood to include the number itself. In addition, in the description of the embodiments of this application, the meaning of "multiple" is two or more (including two), and similar expressions related to "many", such as "multiple groups", "multiple times", etc., are understood in the same way, unless otherwise specifically defined.

[0029] In the description of the embodiments of the present application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the attached drawings. It is only for the convenience of describing the specific embodiments of the present application or for the reader's understanding, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0030] Unless otherwise clearly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "connected", "fixed", "set", etc. should be understood in a broad sense. For example, the "connection" may be a fixed connection, a detachable connection, or an integral setting; it may be directly connected, or indirectly connected through an intermediate medium; it may be the relationship between two components combined together, or the interaction relationship between two components, or the communication inside two structures. For those skilled in the art to which the present application pertains, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0031] As Figures 1-6 shown, the present invention provides a field training device suitable for javelin throwing practice, including: The gantry 1, the gantries 1 are symmetrically arranged, and the gantries 1 are fixedly connected by a plurality of connecting frames 4. The gantry 1 includes two symmetric main columns 101, and the main columns 101 are fixedly connected by two groups of gantry trusses 106. The surfaces of the main columns 101 are respectively movably sleeved with column sliders 6; The throwing mechanism 2, the throwing mechanism 2 includes a column base 201, a remote column 202 and a side plate 203 are fixedly connected to the column base 201. One end of the remote column 202 is movably connected to a lifting screw 205, one end of the lifting screw 205 is fixedly connected to an end block 206, a plug rod 209 is movably arranged in the side plate 203, and an end groove 207 is opened in the end block 206; The steel rope winding mechanism 9, both ends of the steel rope winding mechanism 9 are connected to the column sliders 6 on the same side of the two gantries 1. A throwing steel rope 8 is arranged between the steel rope winding mechanism 9 and the throwing mechanism 2, and a throwing cylinder 11 is sleeved on the surface of the throwing steel rope 8; The traction and shoulder-turning mechanism 3, the traction and shoulder-turning mechanism 3 includes a counterweight disc 301, a traction frame 302 is installed on the counterweight disc 301, a traction pull plate 307 is arranged directly above the traction frame 302, the traction pull plate 307 and the traction frame 302 are fixedly connected by a turnbuckle 304, a traction rope 305 is fixedly connected to the surface of the traction pull plate 307, and the other end of the traction rope 305 is fixedly connected to a pull ring 306.

[0032] As an embodiment of the present invention, a plurality of pin holes 105 are equidistantly opened on the main body column 101, through holes corresponding to the pin holes are opened on the column sliding sleeve 6, a pin 10 is arranged on one side of the column sliding sleeve 6, and the pin 10 respectively passes through the through hole and the pin hole 105.

[0033] Among them, the position of the column sliding sleeve 6 on the main body column 101 is limited by the pin 10, and the pin 10 is inserted into the pin holes 105 at different heights, so as to adjust the position of the column sliding sleeve 6 on the main body column 101.

[0034] As an embodiment of the present invention, extension legs 102 are respectively installed on one side of the bottom of the main body column 101, sleeve rods 103 are respectively fixedly connected to two of the extension legs 102, an installation bottom block 104 is fixedly connected to the bottom of the main body column 101, and installation holes are opened on the installation bottom block 104.

[0035] Among them, as Figure 1 , the sleeve rod 103 is arranged on the extension leg 102 on the side close to the steel rope winding mechanism 9.

[0036] As an embodiment of the present invention, one end of the lifting screw rod 205 is movably inserted into the remote column 202, the end of the remote column 202 away from the column base 201 is rotatably connected with a rotating sleeve 208, the rotating sleeve 208 is threadedly connected with the lifting screw rod 205, a limiting rod 204 is vertically connected to the bottom of the end block 206, one end of the limiting rod 204 movably penetrates through the side plate 203 and is arranged parallel to the remote column 202, and a sleeve rod hole is opened on the column base 201.

[0037] Among them, as Figure 2 , the sleeve rod hole at the bottom of the column base 201 matches the sleeve rod 103. When no throwing training is carried out, the entire throwing mechanism 2 can be limited to one side of the gantry 1. The sleeve rod 103 passes through the sleeve rod hole on the column base 201 and is placed on one side of the steel rope winding mechanism 9. Rotate the rotating sleeve 208, the rotating sleeve 208 is in threaded contact with the lifting screw rod 205, and the height of the lifting screw rod 205 is adjusted to adjust the horizontal height of one end of the throwing mechanism 2 and change the angle of the throwing training.

[0038] As an embodiment of the present invention, a plug rod groove is provided on the side plate 203, a sliding pedal is installed in the plug rod groove, the plug rod 209 is fixedly connected to the bottom of the sliding pedal, and one end of the plug rod 209 movably penetrates through the side plate 203.

[0039] Among them, as Figure 3 , by stepping on the sliding pedal, the plug rod 209 can be pressed down, and the plug rod 209 is inserted into the ground to fix the throwing mechanism 2. It is also possible to fix the throwing mechanism 2 by passing a bolt through the sleeve rod hole.

[0040] As an embodiment of the present invention, the steel wire rope winding mechanism 9 includes a positioning shaft 901. Both ends of the positioning shaft 901 are fixedly connected to the surfaces of two of the column sleeves 6 through positioning blocks 902 respectively. A winding roller 903 is rotatably sleeved on the surface of the positioning shaft 901. One end of the winding roller 903 is provided with a plug-in sleeve 905. A positioning plate 906 is also fixedly sleeved on the surface of the positioning shaft 901. One end of the plug-in sleeve 905 is arranged on one side of the winding roller 903, and the other end is slidably arranged on the surface of the positioning plate 906. The inner wall of the plug-in sleeve 905 is connected to the winding roller 903 through a tension spring 904. A jack 907 is opened at one end of the winding roller 903 close to the plug-in sleeve 905, and a plug block is correspondingly installed on the plug-in sleeve 905.

[0041] Among them, as Figure 6 , the positioning plate 906 is of a rectangular structure. One end of the plug-in sleeve 905 is slidably matched with the positioning plate 906. The plug-in sleeve 905 and the tension spring 904 are both sleeved on the surface of the positioning shaft 901. The plug-in sleeve 905 can move left and right along the positioning plate 906. When the plug-in sleeve 905 is far away from the winding roller 903, the plug block is far away from the jack 907, and the winding roller 903 can rotate freely, so the length of the throwing steel wire rope 8 can be adjusted. In the natural state, the plug-in sleeve 905 is close to the winding roller 903 under the elastic support of the tension spring 904, and the plug block is inserted into the jack 907 to limit the winding roller 903. During the training process, the winding roller 903 cannot be rotated.

[0042] As an embodiment of the present invention, one end of the throwing steel wire rope 8 is fixedly connected with a steel wire rope top block 12, the steel wire rope top block 12 is movably inserted into the end slot 207, and the other end of the throwing steel wire rope 8 is wound around the surface of the winding roller 903.

[0043] Among them, as Figure 3 , the steel wire rope top block 12 can slide inside the end slot 207, so as to achieve the purpose of being detachable and be used for replacing the throwing cylinder 11.

[0044] As an embodiment of the present invention, a directional rod 303 is connected between the two gantry trusses 106 of the gantry 1, and the directional rod 303 respectively movably penetrates through the counterweight plate 301 and the traction pull plate 307.

[0045] Among them, as Figure 2 , a configuration block is added to the counterweight disc 301 to increase the pulling counterweight of the towing rope 305 and change the training intensity.

[0046] As an implementation manner of the present invention, a guiding frame 7 is installed on the gantry truss 106 at the top of the gantry 1. The guiding frame 7 includes an outer frame 701. A first guiding pulley 702 and a second guiding pulley 703 are installed inside the outer frame 701. One end of the towing rope 305 is fixedly connected to the middle of the towing pull plate 307, and the other end movably penetrates through the gantry truss 106 and is in sliding contact with the first guiding pulley 702 and the second guiding pulley 703. The handle ring 306 is arranged on one side of the main body column 101.

[0047] Among them, the guiding frame 7 is used to guide the towing rope 305 so that it can perform traction shoulder shrugging training on one side of the gantry 1 without affecting the throwing training on the other side, and multiple people can perform different trainings simultaneously.

[0048] As an implementation manner of the present invention, a towing pulley frame 5 is installed on two of the column sliding sleeves 6. The towing pulley frame 5 is provided with two groups of towing pulleys, and the towing rope 305 is wound around the surface of the towing pulleys in an "S" shape.

[0049] Among them, the towing pulley frame 5 can increase the pulling and towing angle of the towing rope 305.

[0050] During throwing training, the throwing mechanism 2 is far away from the gantry 1. At this time, the winding roller 903 is loosened. Through the sliding socket 905, the socket 905 moves away from the winding roller 903. Then the winding roller 903 can rotate to stretch the length of the throwing steel rope 8. After determining the position, the socket 905 is released, and the socket 905 drives the plug block to insert into the jack 907 to limit the winding roller 903; For short-term fixation, one end of the insertion rod 209 can be stepped on, and the insertion rod 209 is inserted into the soil to keep the throwing mechanism 2 stable. For length fixation, it can be fixed to the ground through fixing bolts; By rotating the swivel 208, the height of one end of the throwing mechanism 2 can be changed, thereby changing the throwing angle; Hold one end of the throwing tube 11 and throw it forward. The throwing tube 11 slides on the surface of the throwing steel rope 8 to realize in-situ throwing training; During traction training, hold the handle ring 306 and perform reverse shoulder shrugging pulling training. By adding counterweight blocks to the counterweight disc 301, the pulling force is changed; By rotating the turnbuckle 304, the length of the towing rope 305 can be adjusted. It should be noted that although the above embodiments have been described in this article, it does not limit the patent protection scope of the present invention. Therefore, based on the innovative concept of the present invention, any changes and modifications made to the embodiments described in this article, or equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. A field training device suitable for javelin throwing practice, characterized in that, Including: A gantry (1), the gantries (1) are symmetrically arranged, and the gantries (1) are fixedly connected by a plurality of connecting frames (4). The gantry (1) includes two symmetric main columns (101), and the main columns (101) are fixedly connected by two groups of gantry trusses (106). Column sleeves (6) are movably sleeved on the surfaces of the main columns (101); A throwing mechanism (2), the throwing mechanism (2) includes a column base (201), a remote column (202) and a side plate (203) are fixedly connected to the column base (201). One end of the remote column (202) is movably connected to a lifting screw rod (205), one end of the lifting screw rod (205) is fixedly connected to an end block (206), a plug rod (209) is movably arranged in the side plate (203), and an end groove (207) is formed in the end block (206); A steel wire rope winding mechanism (9), both ends of the steel wire rope winding mechanism (9) are connected to the column sleeves (6) on the same side of the two gantries (1). A throwing steel wire rope (8) is arranged between the steel wire rope winding mechanism (9) and the throwing mechanism (2), and a throwing cylinder (11) is sleeved on the surface of the throwing steel wire rope (8); A traction and shoulder-turning mechanism (3), the traction and shoulder-turning mechanism (3) includes a counterweight plate (301), a traction frame (302) is installed on the counterweight plate (301), a traction pull plate (307) is arranged directly above the traction frame (302), the traction pull plate (307) and the traction frame (302) are fixedly connected by a turnbuckle (304), a traction rope (305) is fixedly connected to the surface of the traction pull plate (307), and the other end of the traction rope (305) is fixedly connected to a handle ring (306).

2. The on-site training device applicable to javelin throwing practice according to claim 1, characterized in that A plurality of pin holes (105) are equidistantly formed in the main column (101), corresponding through holes are formed in the column sleeve (6), a pin (10) is arranged on one side of the column sleeve (6), and the pin (10) respectively passes through the through hole and the pin hole (105).

3. The field training device applicable to javelin throwing practice according to claim 1, characterized in that, Expansion legs (102) are respectively installed on one side of the bottom of the main column (101). Sleeve rods (103) are respectively fixedly connected to two of the expansion legs (102). An installation bottom block (104) is fixedly connected to the bottom of the main column (101), and an installation hole is formed in the installation bottom block (104).

4. The site training device applicable to javelin throwing practice according to claim 1, wherein, One end of the lifting screw rod (205) is movably inserted into the remote column (202). A rotating sleeve (208) is rotatably connected to the end of the remote column (202) away from the column base (201). The rotating sleeve (208) is threadedly connected to the lifting screw rod (205). A limiting rod (204) is vertically connected to the bottom of the end block (206). One end of the limiting rod (204) movably penetrates through the side plate (203) and is arranged parallel to the remote column (202). A sleeve rod hole is formed in the column base (201).

5. The on-site training device applicable to javelin throwing practice according to claim 1, characterized in that, The side plate (203) is provided with a plug rod groove, a sliding pedal is installed in the plug rod groove, the plug rod (209) is fixedly connected to the bottom of the sliding pedal, and one end of the plug rod (209) movably penetrates through the side plate (203).

6. The on-site training device applicable to javelin throwing practice according to claim 1, characterized in that, The steel wire rope winding mechanism (9) includes a positioning shaft (901), both ends of the positioning shaft (901) are fixedly connected to the surfaces of two of the column sliding sleeves (6) respectively through positioning blocks (902), a winding roller (903) is rotatably sleeved on the surface of the positioning shaft (901), one end of the winding roller (903) is provided with a plug-in sleeve (905), a positioning plate (906) is also fixedly sleeved on the surface of the positioning shaft (901), one end of the plug-in sleeve (905) is arranged on one side of the winding roller (903), and the other end is slidably arranged on the surface of the positioning plate (906), the inner wall of the plug-in sleeve (905) is connected to the winding roller (903) through a tension spring (904), a jack (907) is opened at one end of the winding roller (903) close to the plug-in sleeve (905), and a plug block is correspondingly installed on the plug-in sleeve (905).

7. The on-site training device applicable to javelin throwing practice according to claim 6, wherein One end of the throwing steel wire rope (8) is fixedly connected to a steel wire rope top block (12), the steel wire rope top block (12) is movably inserted into the end slot (207), and the other end of the throwing steel wire rope (8) is wound around the surface of the winding roller (903).

8. The on-site training device applicable to javelin throwing practice according to claim 1, wherein A directional rod (303) is connected between the two gantry trusses (106) of the gantry (1), and the directional rod (303) respectively movably penetrates through the counterweight plate (301) and the traction pull plate (307).

9. The on-site training device applicable to javelin throwing practice according to claim 1, characterized in that, A guide frame (7) is installed on the gantry truss (106) at the top of the gantry (1), the guide frame (7) includes an outer frame (701), a first guide pulley (702) and a second guide pulley (703) are installed in the outer frame (701), one end of the traction rope (305) is fixedly connected to the middle of the traction pull plate (307), and the other end movably penetrates through the gantry truss (106) and is in sliding contact with the first guide pulley (702) and the second guide pulley (703), and the pull ring (306) is arranged on one side of the main body column (101).

10. The field training device applicable to javelin throwing practice according to claim 1, characterized in that, Two of the column sliding sleeves (6) are provided with a traction pulley frame (5), the traction pulley frame (5) is provided with two groups of traction pulleys, and the traction rope (305) is wound around the surface of the traction pulley in an "S" shape.

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