Weight lifting portal frame structure

Abstract

The utility model relates to a weightlifting portal frame structure. The weightlifting portal frame structure comprises a base; the upper frame is separated from the base by a certain height; the two front stand columns are connected with the base and the upper frame and provided with corresponding sliding grooves and abutting grooves. The two rear stand columns are connected with the base and the upper frame; the two movable columns are arranged in the two front stand columns in a sliding and penetrating mode, each movable column is provided with at least one barbell stand, the barbell stands are exposed out of the two front stand columns, and the two movable columns are provided with a plurality of positioning holes corresponding to the abutting grooves. A plurality of positioning pins are selectively arranged in the positioning holes in a penetrating manner; the two force application rods are pivoted to the two front upright posts; the force application rod abuts against an exposed portion of the positioning pin in a supporting mode, the movable column is moved in a labor-saving mode through the lever effect so that the positioning pin can be pulled out and replaced, and the position of the barbell stand is changed by inserting the positioning pin into different positioning holes.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of lifting weight gantry for adjusting the different height positions of barbell rack by lever action, and cooperate wheel rotation, positioning pin is extracted up and down, which can save labor and quickly adjust the different height positions of barbell rack. BACKGROUND

[0002] Currently, general barbell training is implemented with a lifting weight gantry, so that squatting or bench press and other weight training movements can be performed.

[0003] For example, the utility model of the lifting weight gantry comprehensive training device disclosed in Patent No. CN219539357, announced on August 18, 2023, includes a flying bird part, a high handle part, a low handle part, a weight plate part, a barbell device, and a barbell rack part. The flying bird part, the low handle part, and the barbell rack part are all arranged on the front upright column, and the high handle part is arranged on the horizontal connecting frame. The weight plate part is arranged on the left ground-contacting frame. The flying bird part is connected to the weight plate part through a pulley block. It has a low handle part (double bar), a barbell rack part (free deep squat, weight lifting), a flying bird part, and a chin-up, achieving the effect of exercising multiple parts of the human body. It can also be adjusted in height, front and back, and weight distribution according to different training requirements. The diversified adjustment mechanism cooperates with the rich exercise device to make fitness exercises no longer monotonous, safe, and comfortable.

[0004] The barbell shelf and the safety barbell shelf of the patent prior art are both installed on the front upright column. The installation method can be bolt and nut. There are several through holes distributed along the axis on the front upright column. The barbell shelf and the safety barbell shelf can be adjusted in position according to the needs of the exerciser. Since it uses a combination of bolts and nuts, it is quite troublesome and time-consuming to disassemble and assemble when adjusting to different heights, and it is very inconvenient to adjust.

[0005] The utility model of the lifting weight gantry comprehensive training device disclosed in Patent No. CN212090689, announced on December 8, 2020, includes a balance block mechanism, a hanging frame mechanism, a support turning beam mechanism, a weight lifting rod element, a left front stand, and a right front stand. The left front stand and the right front stand are hollow inside. The balance block mechanism includes two groups of symmetrically arranged balance blocks, a steel cable, and a pulley. The two groups of balance blocks are arranged in the hollow part of the left front stand and the right front stand. The balance blocks are connected to the weight lifting rod element through the steel cable and the pulley. It realizes the compact design of the balance block mechanism, the hanging frame mechanism, and the support turning beam mechanism in one.

[0006] The lifting bar in the prior patent application is connected at both ends to a left and right movable frame, each of which is movably connected to two solid guide rods. The connection structure also uses screws, making assembly and disassembly quite cumbersome and time-consuming. Furthermore, both the left and right floor-mounted frames are designed to gradually retract rearward, reducing their base area and making the entire lifting gantry prone to tipping, making it less than ideal for use. Utility Model Content

[0007] Therefore, in view of the above-mentioned disadvantages of the currently used weightlifting gantry, the purpose of the present invention is to provide a weightlifting gantry structure.

[0008] The utility model provides a weight-lifting gantry structure, comprising: a base; an upper frame, which is spaced apart from the base by a height in a Z direction; two front columns, which are separated from each other along an X direction, extend in the Z direction and respectively connect the base and the upper frame, wherein the two front columns are both hollow and are provided with a corresponding slide groove and a stop groove along the Z direction; two rear columns, which are separated from each other along the X direction and away from the two front columns in a Y direction, wherein the two rear columns extend in the Z direction and respectively connect the base and the upper frame, wherein the X direction, the Y direction and the Z direction are perpendicular to each other; two movable columns, which are spaced apart from each other along the Z direction, and extend in the Z direction, wherein the two movable columns are spaced apart from each other along the X direction, and extend in the Z direction, wherein the two movable columns are spaced apart from each other along the X direction, and extend in the Z direction, wherein the two movable columns are spaced apart from each other along the Z direction, and respectively connect the base and the upper frame. The two movable columns are slidably inserted into the two front columns, and the two movable columns are respectively provided with at least one barbell rack, and the barbell rack is exposed from the two front columns. The two movable columns are respectively provided with a plurality of positioning holes corresponding to the aforementioned stop grooves along the Z direction; a plurality of positioning pins are selectively inserted into the positioning holes; two force rods are respectively pivotally connected to the two front columns; the force rod supports an exposed part of the positioning pin, and moves the movable column with ease through the lever action to extract and replace the positioning pin, and the position of the barbell rack in the Z direction is changed by inserting the positioning pin into different positioning holes.

[0009] Each of the movable columns is provided with two barbell racks along the Z direction.

[0010] The barbell rack away from the base is provided with an upper roller, which is a cylinder and the axis of which is parallel to the Y direction; the barbell rack close to the base is provided with a lower roller, the axis of which is parallel to the Y direction, and a recessed portion is provided on the circumference of the lower roller along the Y direction.

[0011] The above-mentioned further includes two safety frames, and the position of the front column near the base is respectively provided with a plurality of safety frame fixing holes along the Z direction. The two safety frames are provided with a U-shaped fixing seat corresponding to the safety frame fixing holes. The inner edge of the U-shaped fixing seat is respectively provided with a protrusion. The protrusion is selectively engaged with the safety frame fixing hole from different planes, so that the U-shaped fixing seat surrounds the front column and is fixed at different positions in the Z direction.

[0012] The base includes two outwardly extending legs, which are extended from the rear column toward the front column.

[0013] The two rear columns extend obliquely in the Z direction, and the distance between the two rear columns in the X direction gradually increases from the upper frame toward the base. The distance between each rear column and each front column in the Y direction also gradually increases from the upper frame toward the base, wherein each front column is parallel to the Z direction.

[0014] The upper frame includes a pull-up frame, which is placed between the front columns.

[0015] The above further includes at least one lever frame, and the rear column is provided with a plurality of lever frame fixing holes in its extension direction. The lever frame is provided with a U-shaped seat corresponding to the lever frame fixing holes, and the inner edges of the U-shaped seat are respectively provided with protrusions, and the protrusions are selectively inserted into the lever frame fixing holes from different planes, so that the U-shaped seat surrounds the rear column and is fixed at different positions in the Z direction.

[0016] The lever frame is movably pivoted to the U-shaped seat by a pivoting member, so that the lever frame can rotate 90 degrees relative to the U-shaped seat along the extending direction of the rear column through the pivoting member.

[0017] The above-mentioned front column is provided with an axis frame, and a first pivot shaft is provided on the axis frame. The first pivot shaft is pivotally connected to one end of a connecting plate, and the other end of the connecting plate is pivotally connected to the force rod by a second pivot shaft. The force rod extends forward from the second pivot shaft to have a hook portion, and the force rod swings between the front column and the rear column.

[0018] The shaft frame is provided with a rotation axis parallel to the Z direction. The rotation axis is pivotally connected to a rotation seat. An extending end of the rotation seat is pivotally connected to the first pivot axis. The first pivot axis is perpendicular to the rotation axis.

[0019] The upper frame is provided with a barbell bar placement seat, which includes two receiving plates. The distance between the two receiving plates is smaller than a protrusion of a barbell bar.

[0020] The above technical features have the following advantages:

[0021] 1. Within the gantry frame structure, the barbell rack's height can be adjusted quickly and effortlessly. Using the lever, the movable column is raised or lowered relative to the front column. By alternately moving the two positioning pins up and down, the movable column can be raised or lowered to the desired height. Using the same operation, the lever on the other side can be used to raise or lower the movable column to the same height, allowing for effortless and quick adjustment of the barbell rack to different heights for weightlifting exercises such as squats and bench presses.

[0022] 2. The barbell of the barbell can be placed between the two upper rollers and can be rolled along the X direction by the two upper rollers to adjust the left and right position of the barbell in the X direction, which can facilitate lifting the barbell during training.

[0023] 3. The barbell of the barbell can be placed between the two lower rollers. By placing the barbell between the two recessed parts of the two lower rollers, the barbell can be quickly separated from the two recessed parts and lifted during training.

[0024] 4. The two safety frames can be fixed at different heights of the two front columns to prevent the barbell from slipping due to careless loss of grip during bench press weightlifting training. The two safety frames can hold the barbell to avoid accidents.

[0025] 5. The U-shaped fixing base of the second safety frame can be selectively engaged with the fixing holes of the safety frame from different planes through the projections, so that the U-shaped fixing base surrounds the front column and is fixed at different positions in the Z direction. The locking effect of the projections and the three-sided surrounding of the U-shaped fixing base have excellent positioning effect and large load support effect, which can achieve high safety.

[0026] 6. The U-shaped seat of the lever frame can be selectively inserted into the fixing hole of the lever frame from different planes through the protrusions, so that the U-shaped seat surrounds the rear column and is fixed at different positions in the Z direction. The latching effect of the protrusions and the three-sided embrace of the U-shaped seat have an excellent positioning effect. When the lever frame is loaded with a large load, it can provide a firm support to prevent the rear column from shaking, thereby increasing its stability and making it difficult to detach.

[0027] 7. The disassembled lever piece can be hung on the lever piece frame, and the lever piece frame can be rotated 90 degrees along the extension direction of the rear column relative to the U-shaped seat through a pivot member, so as to change the hanging direction of the lever piece to avoid obstruction in entering and exiting the gantry.

[0028] 8. The disassembled barbell bar can be clamped and placed on the barbell bar placement seat of the upper frame. The two receiving pieces of the barbell bar placement seat can be used to relatively clamp the protruding parts of the barbell bar to fix the barbell bar and prevent it from loosening and falling off.

[0029] 9. The base includes two outward-flaring feet that extend from the rear column toward the front column. The relative distance between the two rear columns gradually increases along the X-direction, and the relative distance between the two rear columns and the front column gradually increases along the Y-direction. This increases the base's bottom area and significantly enhances the stability of the weightlifting gantry. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a three-dimensional appearance diagram of an embodiment of the present utility model.

[0031] Figure 2 It is a side view of an embodiment of the present utility model.

[0032] Figure 3 This is an enlarged view of the combination of the front column and the movable column in an embodiment of the present utility model.

[0033] Figure 4 This is an enlarged view of the combination of the front column and the movable column from another perspective of an embodiment of the present invention.

[0034] Figure 5 This is a schematic diagram of an embodiment of the present invention showing a positioning pin passing through a positioning hole and resting against the lower end of a stopping groove.

[0035] Figure 6 This is an exploded schematic diagram of the safety frame and front pillar of an embodiment of the present utility model.

[0036] Figure 7 This is a schematic diagram of a safety frame according to an embodiment of the present invention being combined with a front column in a horizontal direction.

[0037] Figure 8 This is a cross-sectional view of the safety frame according to an embodiment of the present invention, which is vertically coupled to the front column.

[0038] Figure 9 This is an exploded schematic diagram of the lever frame and the rear column according to an embodiment of the present invention.

[0039] Figure 10 This is a schematic diagram of the lever frame according to an embodiment of the present invention being combined with the rear column in a horizontal direction.

[0040] Figure 11 This is a cross-sectional view of the lever frame according to an embodiment of the present invention, which is combined with the rear column in a vertical direction.

[0041] Figure 12 This is a schematic diagram of the lever frame according to an embodiment of the present invention rotated 90 degrees relative to the rear column.

[0042] Figure 13 This is a schematic diagram of the use of the embodiment of the present invention for placing a barbell, a bar plate and a barbell bar respectively.

[0043] Figure 14This is a schematic diagram of the hook portion of the force application rod according to an embodiment of the present invention pressing against the exposed portion of the positioning pin.

[0044] Figure 15 This is a schematic diagram of the force rod lifting the movable column upward according to an embodiment of the utility model.

[0045] Figure 16 This is a schematic diagram of an embodiment of the present invention in which the second positioning pin is inserted into the positioning hole exposed at the lowermost end of the stopping groove.

[0046] Figure 17 This is a schematic diagram of releasing the force rod to allow the movable column to descend by gravity according to an embodiment of the utility model.

[0047] Figure 18 This is a schematic diagram of the hook portion of the force application rod and the positioning pin being separated according to an embodiment of the present utility model.

[0048] Figure 19 This is a schematic diagram of a barbell bar clamped between two receiving pieces of a barbell bar placement seat according to an embodiment of the present invention.

[0049] Explanation of reference numerals: 1-base; 11-outward expansion leg; 2-upper frame; 21-pull-up rack; 22-barbell bar placement seat; 23-receiving plate; 3-front column; 31-slide groove; 32-stop groove; 33-safety rack fixing hole; 34-axis frame; 35-first pivot axis; 36-rotation axis; 37-rotation seat; 4-rear column; 41-bar plate rack fixing hole; 5-movable column; 51-barbell rack; 52 -upper roller; 53-lower roller; 54-recessed portion; 55-positioning hole; 6-positioning pin; 61-exposed portion; 7-force application rod; 71-connecting plate; 72-second pivot axis; 73-hook; 8-safety frame; 81-U-shaped fixing seat; 82-bump; 9-bar plate frame; 91-U-shaped seat; 92-raised portion; 93-pivot member; A-barbell; A1-barbell bar; A2-bar plate; A3-protruding portion. DETAILED DESCRIPTION

[0050] See also Figure 1 and Figure 2 As shown, the utility model provides a weightlifting gantry structure, comprising: a base 1, an upper frame 2, two front columns 3, two rear columns 4, two movable columns 5, a plurality of positioning pins 6, two force rods 7, two safety frames 8 and at least one bar frame 9, wherein:

[0051] A base 1 includes two outwardly extending legs 11. The two outwardly extending legs 11 are extended from the rear column 4 toward the front column 3 to increase the bottom area of ​​the base 1 and significantly enhance the stability of the weightlifting gantry.

[0052] An upper frame 2 is spaced a certain height from the base 1 in the Z direction. The upper frame 2 includes a pull-up frame 21 that spans between the front columns 3. The upper frame 2 is provided with a barbell holder 22 that includes two receiving plates 23. The distance between the two receiving plates 23 is smaller than a protrusion of a barbell bar.

[0053] The two front columns 3 are separated from each other along the X-direction. The two front columns 3 extend in the Z-direction and are connected between the base 1 and the upper frame 2. The two front columns 3 are both hollow square frames and are each provided with a corresponding slide groove 31 and a stop groove 32 along the Z-direction. The slide groove 31 and the stop groove 32 are located on different sides of the two front columns 3. The front columns 3 near the base 1 are provided with a plurality of safety frame fixing holes 33 on two adjacent sides along the Z-direction. The front columns 3 are also provided with an axis bracket 34. The axis bracket 34 is provided with a first pivot axis 35. The axis bracket 34 is provided with a rotation axis 36 parallel to the Z-direction. The rotation axis 36 is pivotally connected to a rotating seat 37. An extended end of the rotating seat 37 is pivotally connected to the first pivot axis 35. The first pivot axis 35 is perpendicular to the rotation axis 36.

[0054] The two rear columns 4 are separated from each other along the X-direction and away from the two front columns 3 in the Y-direction. The two rear columns 4 extend in the Z-direction and respectively connect the base 1 and the upper frame 2. The X-direction, the Y-direction, and the Z-direction are perpendicular to each other. The two rear columns 4 extend obliquely in the Z-direction. The distance between the two rear columns 4 in the X-direction gradually increases from the upper frame 2 toward the base 1. The distance between each rear column 4 and each front column 3 in the Y-direction also gradually increases from the upper frame 2 toward the base 1, and each front column 3 is parallel to the Z-direction. The rear columns 4 are provided with a plurality of bar frame fixing holes 41 along their extension direction.

[0055] 2. Move column 5, as Figure 3 、 Figure 4 and Figure 5As shown, the two movable columns 5 are each provided with at least one barbell rack 51, slidably disposed within the two front uprights 3 along the Z direction. In this embodiment of the utility model, each movable column 5 is provided with two barbell racks 51 along the Z direction. The barbell rack 51, located above and away from the base 1, is provided with an upper roller 52. The upper roller 52 is cylindrical, with its axis parallel to the Y direction. Furthermore, the barbell rack 51, located below and closer to the base 1, is provided with a lower roller 53. The axis of the lower roller 53 is parallel to the Y direction, and a recessed portion 54 is provided along the circumference of the lower roller 53 along the Y direction. The recessed portion 54 allows the barbell bar to be placed between the two recessed portions 54 of the two lower rollers 53, facilitating quick disengagement from the two recessed portions 54 when lifting the barbell bar during bench press training. The barbell rack 51 is exposed outside the two front columns 3 , and the two movable columns 5 are respectively provided with a plurality of positioning holes 55 along the Z direction corresponding to the aforementioned stop grooves 32 .

[0056] A plurality of positioning pins 6 are selectively inserted into the positioning holes 55 . In the embodiment of the present invention, at least two positioning pins 6 are provided. Each positioning pin 6 has an exposed portion 61 , which can abut against the lower end of the abutting groove 32 .

[0057] Two force-applying rods 7 are pivotally connected to the two front columns 3, respectively. The two force-applying rods 7 are respectively movably supported against the exposed portion 61 of the positioning pin 6, and the movable column 5 is moved upward or downward with ease through the lever action to replace the positioning pin 6. By inserting the two positioning pins 6 into different positioning holes 55, the barbell rack 51 is changed to different positions in the Z direction. The force-applying rod 7 is respectively provided with a connecting plate 71, one end of the connecting plate 71 is pivotally connected to the first pivot shaft 35, and the other end of the connecting plate 71 is pivotally connected to the force-applying rod 7 by a second pivot shaft 72. The force-applying rod 7 has a hook portion 73 extending forward from the second pivot shaft 72. The force-applying rod 7 swings between the front column 3 and the rear column 4 through the rotating seat 37 with the rotating shaft 36 as the axis.

[0058] Second safety frame 8, such as Figure 6 、 Figure 7 and Figure 8 As shown, the two safety frames 8 are provided with a U-shaped fixing seat 81 corresponding to the safety frame fixing hole 33, and the inner edge of the U-shaped fixing seat 81 is provided with a protrusion 82. The protrusion 82 is selectively engaged with the safety frame fixing hole 33 from different planes, so that the U-shaped fixing seat 81 surrounds the front column 3 and is fixed at different positions in the Z direction.

[0059] At least one bar sheet frame 9, such as Figure 9 、 Figure 10 and Figure 11As shown, the lever frame 9 is provided with a U-shaped seat 91 corresponding to the lever frame fixing hole 41. The inner edge of the U-shaped seat 91 is provided with at least one protrusion 92. The protrusion 92 is selectively engaged with the lever frame fixing hole 41 from different planes, so that the U-shaped seat 91 surrounds the rear column 4 and is fixed at different positions in the Z direction. Figure 12 As shown, the lever frame 9 is movably pivoted to the U-shaped seat 91 by a pivot member 93 , so that the lever frame 9 can rotate 90 degrees relative to the U-shaped seat 91 along the extension direction of the rear column 4 through the pivot member 93 .

[0060] When using, Figure 2 、 Figure 3 and Figure 13 As shown, a barbell A can be placed between the two barbell racks 51, positioned higher or lower, of the movable column 5, depending on the desired weightlifting training, such as squats or bench presses. If the upper barbell racks 51 are selected, the barbell rod A1 of the barbell A will be placed between the two upper rollers 52. These upper rollers 52 can be rolled along the X-axis to adjust the position of the barbell A left and right, making it easier to lift the barbell A during training. If the lower barbell racks 51 are selected, the barbell rod A1 of the barbell A will be placed between the two lower rollers 53. With the barbell rod A1 placed between the two recessed portions 54 of the lower rollers 53, the barbell rod A1 can be quickly released from the recessed portions 54 when lifting the barbell A1 during bench press training.

[0061] like Figure 3 、 Figure 4 and Figure 14 As shown, when the barbell rack 51 needs to be adjusted to a different height position of the front column 3, first, the hook portion 73 of the force-applying rod 7 on one side is hooked correspondingly to the exposed portion 61 of the positioning pin 6 that passes through the movable column 5 and abuts against the lower end of the stop groove 32. Figure 15 As shown, the force rod 7 is then supported by the first pivot shaft 35 and the connecting piece 71, and the second pivot shaft 72 is used as a fulcrum to swing the force rod 7 downward. Through the lever action, the exposed portion 61 and the positioning pin 6 are pushed upward. The positioning pin 6 is used relative to the front column 3 to lift the movable column 5 upward along the Z direction. Figure 16 As shown, another second positioning pin 6 is inserted into the positioning hole 55 exposed at the bottom of the stop groove 32. Figure 17As shown, loosen the force rod 7, and the movable column 5 is lowered by gravity. The exposed portion 61 of the second positioning pin 6 can abut against the lower end of the stop groove 32, so that the raised movable column 5 can be raised and fixed relative to the front column 3. Then, the same lever action operation is applied, and the two positioning pins are alternately pulled up and down to raise the movable column 5 to the desired height. Figure 18 As shown, the hook portion 73 of the force-applying rod 7 is finally separated from the exposed portion 61 of the positioning pin 6 located above the stop groove 32, and the force-applying rod 7 is returned to its original position. The force-applying rod 7 on the other side is then operated in the same manner to raise the movable column 5, so that the movable columns 5 on both sides can be raised to the same height relative to the two front columns 3, thereby labor-savingly and quickly adjusting the barbell rack 51 to different heights. If the movable column 5 is to be lowered, the above-described operation can be reversed. First, the second positioning pin 6 is inserted into the positioning hole 55 that is exposed upwardly in the stop groove 32 near the upper portion. Then, the hook portion 73 of the force-applying rod 7 is hooked onto the exposed portion 61 of the positioning pin 6 that passes through the movable column 5 at the upper portion, slightly raising the movable column 5. Then, the positioning pin 6 at the lower portion is pulled out. The force-applying rod 7 is then released, allowing the movable column 5 to descend under gravity, so that the exposed portion 61 of the positioning pin 6 originally at the upper portion can abut against the lower end of the stop groove 32, allowing the movable column 5 to be lowered and fixed relative to the front column 3. Then, the above-described lever-action operation is repeated, and the two positioning pins 6 are alternately pulled up and down to lower the movable column 5 to the desired height.

[0062] like Figure 2 and Figure 13 As shown, the safety frame 8 can be fixed at different heights of the two front columns 3 to prevent the barbell A from slipping due to careless loss during bench press weightlifting training. The two safety frames 8 can be used to hold the barbell A to avoid accidental injury. Figure 6 and Figure 7 As shown, the U-shaped fixing seat 81 can be horizontally inserted into the safety frame fixing hole 33 on one side of the side with the corresponding height by clamping the protrusion 82 on one of the inner edges. Figure 8 As shown, the U-shaped fixing seat 81 is then rotated 90 degrees in the vertical direction, and the protrusion 82 on the other inner edge surface of the U-shaped fixing seat 81 is snapped into the safety frame fixing hole 33 on the other side surface at the corresponding height, so that the U-shaped fixing seat 81 surrounds the front column 3 and can be selectively fixed at positions at different heights in the Z direction. By utilizing the locking effect of the protrusions 82 and the three-sided embrace of the U-shaped fixing seat 81, a better positioning effect and a larger load support effect can be achieved, thereby ensuring safety during weightlifting training.

[0063] like Figure 2 and Figure 13 As shown, the decomposed lever piece A2 can be hung on the lever piece frame 9. When it is necessary to adjust the lever piece frame 9 to be fixed to different heights on the rear column 4, as shown in FIG. Figure 9 and Figure 10 As shown, the U-shaped seat 91 clamps the protrusion 92 into the corresponding height of the lever frame fixing hole 41 in the horizontal direction. Figure 11 As shown, the U-shaped seat 91 is then rotated 90 degrees in the vertical direction so that the U-shaped seat 91 surrounds the rear column 4 and can be selectively fixed at different heights in the Z direction. The latching effect of the protrusion 92 and the three-sided embrace of the U-shaped seat 91 provide a better positioning effect. When the bar frame 9 is loaded with a large amount of weight, it provides a stable support effect to prevent the rear column 4 from shaking. Figure 12 As shown, the lever frame 9 can be rotated 90 degrees relative to the U-shaped seat 91 along the extension direction of the rear column 4 through the pivot member 93, so as to change the hanging direction of the lever A2 to prevent the lever A2 hung on the lever frame 9 from obstructing the entry and exit of the gantry.

[0064] like Figure 19 As shown, the disassembled barbell rod A1 can be clamped and placed on the barbell rod placement seat 22 of the upper frame 2. The two receiving pieces 23 of the barbell rod placement seat 22 can be used to relatively clamp the protrusion A3 of the barbell rod A1 to fix the barbell rod A1 and prevent it from loosening and falling off.

[0065] Based on the description of the above embodiments, one should be able to fully understand the operation, use and effects of the present invention. The above embodiments are only preferred embodiments of the present invention and should not be used to limit the scope of implementation of the present invention. That is, all simple equivalent changes and modifications made based on the contents of the present invention specification are within the scope of the present invention.

Claims

1. A weightlifting gantry structure, characterized in that: Includes: a base; an upper frame, spaced apart from the base by a height in a Z direction; Two front columns separated from each other along an X direction and extending in the Z direction to connect the base and the upper frame respectively, the two front columns are both hollow and each has a corresponding sliding groove and a stopping groove along the Z direction; two rear uprights, spaced apart from each other along the X direction and away from the two front uprights in a Y direction, the two rear uprights extending in the Z direction to connect the base and the upper frame respectively, the X direction, the Y direction, and the Z direction being perpendicular to each other; Two movable columns are slidably disposed in the two front columns along the Z direction, each of the two movable columns is provided with at least one barbell rack, and the barbell rack is exposed from the two front columns. The two movable columns are also provided with a plurality of positioning holes along the Z direction corresponding to the aforementioned stop grooves; A plurality of positioning pins are selectively inserted into the positioning holes; Two force-applying rods, pivotally connected to the two front pillars respectively; The force-applying rod supports an exposed portion of the positioning pin, and moves the movable column with ease through the lever action to replace the positioning pin. By inserting the positioning pin into different positioning holes, the position of the barbell rack in the Z direction is changed.

2. The weightlifting gantry structure according to claim 1, characterized in that: Each of the movable columns is provided with two barbell racks along the Z direction.

3. The weightlifting gantry structure according to claim 2, characterized in that: The barbell rack away from the base is provided with an upper roller, which is a cylinder and the axis of which is parallel to the Y direction; the barbell rack close to the base is provided with a lower roller, the axis of which is parallel to the Y direction, and a recessed portion is provided on the circumference of the lower roller along the Y direction.

4. The weightlifting gantry structure according to claim 1, wherein: The invention also includes two safety frames, wherein the front column is provided with a plurality of safety frame fixing holes along the Z direction at a position close to the base. The two safety frames are provided with a U-shaped fixing seat corresponding to the safety frame fixing holes. The inner edges of the U-shaped fixing seats are respectively provided with protrusions, and the protrusions are selectively engaged with the safety frame fixing holes from different planes, so that the U-shaped fixing seat surrounds the front column and is fixed at different positions in the Z direction.

5. The weightlifting gantry structure according to claim 1, characterized in that: The base includes two outwardly extending legs, and the two outwardly extending legs are extended from the rear column toward the front column.

6. The weightlifting gantry structure according to claim 1, characterized in that: The two rear columns extend obliquely in the Z direction, and the distance between the two rear columns in the X direction gradually increases from the upper frame toward the base. The distance between each rear column and each front column in the Y direction also gradually increases from the upper frame toward the base, wherein each front column is parallel to the Z direction.

7. The weightlifting gantry structure according to claim 1, characterized in that: The upper frame includes a pull-up frame, which is placed across the front columns.

8. The weightlifting gantry structure according to claim 1, characterized in that: It also includes at least one lever frame, and the rear column is provided with a plurality of lever frame fixing holes in the extension direction. The lever frame is provided with a U-shaped seat corresponding to the lever frame fixing holes, and the inner edges of the U-shaped seat are respectively provided with protrusions, and the protrusions are selectively inserted into the lever frame fixing holes from different planes, so that the U-shaped seat surrounds the rear column and is fixed at different positions in the Z direction.

9. The weightlifting gantry structure according to claim 8, characterized in that: The lever frame is movably pivoted to the U-shaped seat by a pivoting member, so that the lever frame can rotate 90 degrees relative to the U-shaped seat along the extending direction of the rear column through the pivoting member.

10. The weightlifting gantry structure according to claim 1, characterized in that: The front column is provided with an axis frame, and a first pivot shaft is provided on the axis frame. The first pivot shaft is pivotally connected to one end of a connecting plate, and the other end of the connecting plate is pivotally connected to the force rod by a second pivot shaft. The force rod extends forward from the second pivot shaft to have a hook portion, and the force rod swings between the front column and the rear column.

11. The weightlifting gantry structure according to claim 10, characterized in that: The shaft frame is provided with a rotation axis parallel to the Z direction. The rotation axis is pivotally connected to a rotation seat. An extending end of the rotation seat is pivotally connected to the first pivot axis. The first pivot axis is perpendicular to the rotation axis.

12. The weightlifting gantry structure according to claim 1, characterized in that: The upper frame is provided with a barbell rod placement seat, which includes two receiving plates. The distance between the two receiving plates is smaller than a protrusion of a barbell rod.

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