Material carrying frame capable of being telescopically adjusted

Abstract

The utility model discloses a material carrying frame capable of being telescopically adjusted, and belongs to the technical field of logistics carriers. Comprising a telescopic base and a buffer plate arranged on the telescopic base, the telescopic base comprises a middle base, a front base and a rear base, the front base and the rear base are movably arranged on the two sides of the middle base, bent plates with holes are arranged on the front base and the rear base respectively, and battens are movably arranged on the bent plates with holes. The batten is provided with a limiting device a, a limiting device b, a pressing device and a rotating limiting device, and the middle base is provided with a lock and a locking device which are used for fixing the front base and the rear base. The utility model has the beneficial effects that the application range of the material carrying frame is expanded, the cost required by transportation is reduced, and the material carrying frame is adaptive to vehicle types with different sizes by adjusting the width of the material carrying frame.

Description

Technical Field

[0001] The invention relates to a telescopically adjustable material carrier, belonging to the technical field of logistics carriers. Background Art

[0002] The material rack uses the fixing devices thereon to fix the products during transportation. The existing material racks have fixed dimensions and the positions of the fixing devices thereon are also fixed. However, there are many product specifications. Each specification of product requires a corresponding material rack with a corresponding dimension. A large number of material racks and fixing devices of different dimensions are required, which increases the transportation cost. Summary of the invention

[0003] In order to solve the defects of the prior art, the purpose of the present invention is to provide a retractable and adjustable loading rack that is suitable for the transportation of products of different specifications and sizes and reduces costs.

[0004] The technical solution of the present invention is: a telescopic and adjustable loading rack, comprising a telescopic base and a buffer plate arranged on the telescopic base, the telescopic base comprising a middle base and a front base and a rear base movably arranged on both sides of the middle base, the front base and the rear base are both provided with a bent plate with holes, the slats are movably arranged on the bent plate with holes, the slats are provided with a limit device a, a limit device b, a clamping device and a rotation limit device, the middle base is provided with a lock and a locking device for fixing the front base and the rear base.

[0005] The limiting device a includes a fixed bent plate a fixed on the slat, a limiting plate fixed in the middle of the fixed bent plate a, a column passing through the fixed bent plate a and the limiting plate, a mounting plate fixed at the bottom of the column, a plurality of plungers for penetrating holes a and holes b are provided at the bottom of the mounting plate, and the plurality of holes a and holes b are respectively arranged on the slat and the bent plate with holes, a spring a is arranged outside the column, and the spring a is located between the limiting plate and the mounting plate, a guide plate a is provided on the column, a guide hole matching the guide plate a is opened on the fixed bent plate a, and a handle pin a is provided on the column.

[0006] The limiting device b comprises a vertical limiting surface with a bottom fixed on the slat, and the top of the vertical limiting surface is connected to an inclined guiding slope.

[0007] The rotation limiting device includes a telescopic limiting device fixed on a bottom plate, the bottom plate is arranged on the slats by a bolt assembly a, the bottom plate is provided with an arc-shaped side end, the arc-shaped side end is provided with a sawtooth a, the sawtooth a can be engaged with the sawtooth b on the tooth plate, and the tooth plate is arranged on the slats by a bolt assembly b;

[0008] The telescopic limiting device includes a fixed bent plate b fixed on the bottom plate, an angle steel is fixed to the open end of the fixed bent plate b, a sliding bent plate is slidably connected to the fixed bent plate b, long waist holes are opened on both sides of the sliding bent plate, a guide bolt penetrates and connects the long waist hole and the fixed bent plate b, the end of the guide bolt is threadedly connected to a locking nut, the open end of the sleeve penetrates the fixed bent plate b, the other end of the sleeve is fixed to the sliding bent plate, a screw rod penetrating the angle steel is threadedly connected to the internal thread of the sleeve, a rotating driving mechanism is provided at the end of the screw rod, the top of the guide plate b is fixed to the sleeve, the end of the guide plate b is fixed to the sliding bent plate, and the guide plate b penetrates and is movably connected to the fixed bent plate b.

[0009] The rotary drive mechanism is a manual rotary drive mechanism, including a butterfly nut threadedly connected to the end of the screw, a limit pin a passing through the butterfly nut and extending into the screw, the screw passing through gasket a and gasket b, the gasket a and gasket b are respectively attached to the two sides of the angle steel, the stop pin on the screw contacts the surface of gasket a, the side of gasket b is attached to the limit nut, and the screw passes through and is threadedly connected to the limit nut.

[0010] The middle base comprises square tubes with openings at both ends and arranged in parallel, and the adjacent square tubes are connected by connecting rods a. The square tubes comprise a middle square tube, and side square tubes a and side square tubes b symmetrically distributed on both sides of the middle square tube, and the two ends of the bent plate with holes are connected to the side square tubes b and the side square tubes a respectively;

[0011] The front base and the rear base both include a connecting rod b and a plurality of bent plates with holes vertically connected to the connecting rod b. Side tubes are provided at both ends of the connecting rod b. The plurality of bent plates with holes are respectively plugged into and matched with the middle square tube and the side square tube a, and the side tubes are plugged into and matched with the side square tube b.

[0012] The lock comprises a plate fixed on the side tube b, a limit plate fixed on the plate, a movable plug rod passing through and movably connecting the plate and the limit plate, an end of the movable plug rod being inserted and matched with a socket a on the side tube b and a socket b on the side tube, a limit pin b being fixed on the movable plug rod, a spring b being sleeved on the movable plug rod, the spring b being located between the limit pin b and the limit plate, a baffle being provided on the movable plug rod, a clearance hole being opened on the plate, the baffle being detachable and movably matched with the clearance hole, and a handle pin b being provided on the movable plug rod;

[0013] The plurality of jacks b are located on the same straight line, the jack a is a round hole, and the jack b is a long hole. The center of the jack a can be made coaxial with the center of any jack b and the movable plug rod through relative movement.

[0014] The locking device includes a fixing nut located on the lateral tube b, a lifting eye bolt threadedly connected to the fixing nut passes through the lateral tube b, and the lifting eye bolt is threadedly connected to a locking nut located above the fixing nut.

[0015] The buffer plate includes a fixed buffer support plate, a movable buffer support plate a and a movable buffer support plate b that can be spliced ​​and matched. The fixed buffer support plate is fixed to the middle of the middle base, the relatively arranged movable buffer support plates a are located on both sides of the middle base, and the relatively arranged movable buffer support plates b are respectively fixed to the front base and the rear base. The middle base is provided with a slide rail, and the movable buffer support plate b is slidably connected to the slide rail; bent plates with holes are provided on both sides of the middle base, and the slats connected to the movable buffer support plate a are movably arranged on the bent plates with holes;

[0016] The fixed buffer supporting plate, the movable buffer supporting plate a and the movable buffer supporting plate b are all non-metal plates with an upper and lower double-layer structure.

[0017] Both ends of the front base and the rear base are provided with enclosures for limiting the vertical pipes. The bottom of the vertical pipe is rotatably connected to the enclosure, the top of the vertical pipe is provided with a plug, and the bottom of the enclosure is provided with a foot.

[0018] The beneficial effects of the present invention are as follows: the relative position of the bent plate and the slats is changed by the adjusting device, thereby changing the spacing between the limiting devices on both sides of the rack and the spacing between the clamping devices; a clamping device and different limiting devices are arranged on the rack to fix the products to be transported at multiple positions, so that the rack can be adapted to the transportation of products of different specifications and sizes, thereby expanding the use range of the rack and reducing the cost required for transportation; vertical pipes are arranged around the rack to realize the upper and lower stacking of the rack, and the space utilization is more reasonable; by adjusting the width of the rack, it can be adapted to different sizes of vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The structure of the present invention Figure 1 ;

[0020] Figure 2 The structure of the present invention Figure 2 ;

[0021] Figure 3 The working state diagram of the present invention;

[0022] Figure 4 is a structural diagram of the limiting device a;

[0023] Figure 5 It is the front view of the limiting device a;

[0024] Figure 6 It is a structural diagram of the limiting device b and the clamping device;

[0025] Figure 7 is a structural diagram of the rotation limit device;

[0026] Figure 8 is a top view of the rotation limiting device;

[0027] Fig. 9 It is a partial view of the rotation limiting device;

[0028] Fig.10 It is the working state diagram of the rotation limit device;

[0029] Fig.11 This is the structural diagram of the middle base;

[0030] Fig.12 This is the structural diagram of the front base;

[0031] Fig.13 Locking device and lock structure Figure 1 ;

[0032] Fig.14 Locking device and lock structure Figure 2 ;

[0033] Fig.15 This is the status diagram of the upper and lower stacking of the loading rack;

[0034] Fig.16 This is a diagram of the material rack in the upper and lower stacking storage state without material.

[0035] The reference numerals in the figure are as follows: 1. Slat, 2. Limiting device a, 2.1. Handle pin a, 2.2. Fixed bent plate, 2.3. Guide hole, 2.4. Hole a, 2.5. Hole b, 2.6. Limiting plate, 2.7. Column, 2.8. Mounting plate, 2.9. Plunger, 2.10. Spring a, 2.11. Guide plate a, 3. Limiting device b, 3.1. Vertical limiting surface, 3.2. Guide inclined surface, 4. Pressing device , 5, bent plate with holes, 6, rotation limit device, 6.1, bottom plate, 6.2, fixed bent plate b, 6.3, angle steel, 6.4, sliding bent plate, 6.5, long waist hole, 6.6, guide bolt, 6.7, sleeve, 6.8, screw, 6.9, limit nut, 6.10, stop pin, 6.11, gasket a, 6.12, butterfly nut, 6.13, guide plate b, 6.14, gasket b, 6.15, Sawtooth a, 6.16, tooth plate, 7, middle base, 7.1, middle square tube, 7.2, side square tube a, 7.3, side square tube b, 7.4, connecting rod a, 7.5, socket a, 7.6, slide rail, 8, front base, 8.1, connecting rod b, 8.2, side tube, 8.3, socket b, 9, rear base, 10, lock, 10.1, baffle, 10.2, clearance hole, 10.3, word board, 10.4, limit Plate, 10.5, handle pin b, 10.6, spring b, 10.7, movable plug rod, 10.8, limit pin b, 11, locking device, 11.1, fixing nut, 11.2, eye bolt, 11.3, locking nut, 12.1, fixed buffer support plate, 12.2, movable buffer support plate a, 12.3, movable buffer support plate b, 13, enclosure, 14, riser, 15, plug, 16, base. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-16 The present invention is further described:

[0037] A telescopic and adjustable loading rack comprises a telescopic base and a buffer plate arranged on the telescopic base, the telescopic base comprises a middle base 7 and a front base 8 and a rear base 9 movably arranged on both sides of the middle base 7, the front base 8 and the rear base 9 are both provided with a bent plate 5 with a hole, a slat 1 is movably arranged on the bent plate 5 with a hole, a limit device a2, a limit device b3, a clamping device 4 and a rotation limit device 6 are provided on the slat 1, and a lock 10 and a locking device 11 for fixing the front base 8 and the rear base 9 are provided on the middle base 7. The limiting device a2 includes a fixed bent plate a2.2 fixed on the slat 1. The fixed bent plate a2.2 is an "I"-shaped structure. The two sides of the bottom of the "I"-shaped structure are fixed to the slats 1 at both ends of the bending plate 5 by bolts. The slats 1 are movably arranged vertically above the two ends of the bending plate 5. A limiting plate 2.6 is fixed in the middle of the fixed bent plate a2.2. The column 2.7 penetrates the fixed bent plate a2.2 and the limiting plate 2.6. A mounting plate 2.8 is fixed at the bottom of the column 2.7. A plurality of plungers 2.9 for penetrating holes a2.4 and holes b2.5 are arranged at the bottom of the mounting plate 2.8. The plurality of holes a2.4 and holes b2.5 are respectively arranged on the slat 1 and the bending plate 5. The outer cover of the column 2.7 is provided with an elastic Spring 2.10, the spring 2.10 is located between the limit plate 2.6 and the mounting plate 2.8, the column 2.7 is provided with a guide plate a2.11, the fixed bent plate a2.2 is provided with a guide hole 2.3 that cooperates with the guide plate a2.11, and the column 2.7 is provided with a handle pin a2.1. Through the guiding cooperation, the downward-moving plunger 2.9 is opposite to the hole a2.4, so that the plunger 2.9 can be smoothly inserted into the hole a2.4, and by adjusting the position of the bending plate 5, when the hole b2.5 is opposite to the hole a2.4, since the spring 2.10 is in a compressed state, the plunger 2.9 can automatically penetrate the hole a2.4 and the hole b2.5, thereby realizing the limiting fixation of the bending plate 5 and the slat 1.

[0038] The limiting device b3 includes a vertical limiting surface 3.1 fixed at the bottom on the slat 1, and a top of the vertical limiting surface 3.1 connected to an inclined guiding slope 3.2. When placing a product, both ends of the product are guided by the guiding slope 3.2 and move down to the bottom of the vertical limiting surface 3.1. The vertical positioning surfaces 3.1 are located on both sides of the product to position the product.

[0039] The clamping device 4 is a horizontal quick clamp, and both sides of the product are clamped by the horizontal quick clamp to prevent the product from moving up and down. The horizontal quick clamp is an existing product available on the market, and the product model is 201C.

[0040] The rotation limit device 6 includes a telescopic limit device fixed on a base plate 6.1, and the base plate 6.1 is set on the slat 1 through a bolt assembly a. The base plate 6.1 is provided with an arc-shaped side end, and the arc-shaped side end is provided with a sawtooth a6.15, and the sawtooth a6.15 can be engaged with the sawtooth b on the tooth plate 6.16, and the tooth plate 6.16 is set on the slat 1 through a bolt assembly b.

[0041] The telescopic limiting device comprises a fixed curved plate b6.2 fixed on the bottom plate 6.1, an angle steel 6.3 is fixed to the open end of the fixed curved plate b6.2, a sliding curved plate 6.4 is slidably connected to the fixed curved plate b6.2, a polyurethane stopper is fixed to the end of the sliding curved plate 6.4, and the polyurethane stopper is contacted with the product to limit the position, long waist holes 6.5 are opened on both sides of the sliding curved plate 6.4, and guide bolts 6.6 pass through the long waist holes 6.5 and the fixed curved plate b6.2, and the sliding curved plate 6.4 is connected to the fixed curved plate 6.4 through the guide bolts 6.6. 2 sliding connection, the end of the guide bolt 6.6 is threadedly connected to the locking nut, the open end of the sleeve 6.7 passes through the fixed bent plate b6.2, and the other end of the sleeve 6.7 is fixed on the sliding bent plate 6.4. The screw 6.8 that passes through the angle steel 6.3 is threadedly connected to the internal thread of the sleeve 6.7. A rotating drive mechanism is provided at the end of the screw 6.8. The top of the guide plate b6.13 is fixed to the sleeve 6.7, and the end of the guide plate b6.13 is fixed to the sliding bent plate 6.4. The guide plate b6.13 passes through and is movably connected to the fixed bent plate b6.2.

[0042] The rotary drive mechanism is a manual rotary drive mechanism, including a butterfly nut 6.12 threadedly connected to the end of the screw rod 6.8, a limit pin passing through the butterfly nut 6.12 and extending into the screw rod 6.8, the screw rod 6.8 passing through a gasket a6.11 and a gasket b6.14, the gasket a6.11 and the gasket b6.14 are respectively attached to the two sides of the angle steel 6.3, the stop pin 6.10 on the screw rod 6.8 is in contact with the surface of the gasket a6.11, the side of the gasket b6.14 is attached to the limit nut 6.9, the screw rod 6.8 passes through and is threadedly connected to the limit nut 6.9, the limit nut 6.9 and the stop pin 6.10 cooperate to limit the screw rod 6.8 from axial movement, and the rotation of the screw rod 6.8 in the sleeve 6.7 is converted into the axial movement of the sliding bent plate 6.4 driven by the sleeve 6.7.

[0043] The specific operation of the rotary limit device 6 when in use is as follows: turn the butterfly nut 6.12 to make the sliding bent plate 6.4 drive the polyurethane stopper to move toward the placed product, and place the polyurethane stopper against the outside of the product to play a role in limiting and fixing. When vibration or collision occurs during transportation, the screw 6.8 is subjected to axial force, the structure is more stable, and it can play a more reliable role in limiting and fixing. The polyurethane stopper at the end of the sliding bent plate 6.4 can reduce shock and increase friction, thereby increasing the stability of the limit fixation and protecting the product from damage due to vibration or collision during transportation.

[0044] The middle base 7 includes square tubes with openings at both ends and arranged in parallel. Adjacent square tubes are connected by connecting rods a7.4. The square tubes include a middle square tube 7.1, and side square tubes a7.2 and side square tubes b7.3 symmetrically distributed on both sides of the middle square tube 7.1. The two ends of the perforated bent plate 5 are respectively connected to the side square tubes b7.3 and the side tubes a7.2; the front base 8 and the rear base 9 both include connecting rods b8.1, and a plurality of perforated bent plates 5 vertically connected to the connecting rods b8.1. Side tubes 8.2 are provided at both ends of the connecting rods b8.1. The plurality of perforated bent plates 5 are respectively plugged in with the middle square tube 7.1 and the side square tubes a7.2, and the side tubes 8.2 are plugged in with the side tubes b7.3, so that the front base 8 and the rear base 9 can be adjusted in position along the extension direction of the middle square tube 7.1 to change the size of the loading rack.

[0045] The lock 10 includes a plate 10.3 fixed on the side tube b7.3, a limit plate 10.4 fixed on the plate 10.3, a movable rod 10.7 penetrates and movably connects the plate 10.3 and the limit plate 10.4, the end of the movable rod 10.7 is inserted into the socket a7.5 on the side tube b7.3 and the socket b8.3 on the side tube 8.2, a limit pin b10.8 is fixed on the movable rod 10.7, a spring b10.6 is sleeved on the movable rod 10.7, and the spring b 10.6 is located between the limit pin b10.8 and the limit plate 10.4, the movable plug rod 10.7 is provided with a baffle 10.1, the letter plate 10.3 is provided with a clearance hole 10.2, the baffle 10.1 is detachable and movably cooperates with the clearance hole 10.2, and the movable plug rod 10.7 is provided with a handle pin b10.5; the setting of the handle pin b10.8 facilitates manual pulling and rotation of the movable plug rod 10.7; when the movable plug rod 10.7 needs to be inserted into the socket a7.5 and the socket b8.3, the movable plug rod 1 is rotated 0.7, align the baffle 10.1 on it with the clearance hole 10.2, the baffle 10.1 moves along the clearance hole 10.2, and the movable plug rod 10.7 moves toward the insertion direction under the action of the spring b10.6 and inserts into the insertion hole a7.5 and the insertion hole b8.3. The limit pin b10.8 limits the movement of the movable plug rod 10.7 to prevent the movable plug rod 10.7 from moving over the stroke. After moving into position, the movable plug rod 10.7 is rotated to make the end of the baffle 10.1 rotate a certain angle to separate from the clearance hole 10.2 to prevent the movable plug rod 10 .7 accidentally exits the socket; when it is necessary to pull out the movable plug rod 10.7, first rotate the movable plug rod 10.7 to align the end of the baffle 10.1 with the clearance hole 10.2, and then pull the movable plug rod 10.7 to separate its end from the socket. When the baffle 10.1 completely leaves the clearance hole 10.2, rotate the movable plug rod 10.7, and then release the movable plug rod 10.7. Under the action of the spring b10.6, the end of the baffle 5.1 rests on the cross plate 3, limiting the axial movement of the movable plug rod 5.7 to prevent its end from automatically entering the socket.

[0046] The plurality of sockets b8.3 are located on the same straight line, the socket a7.5 is a round hole, and the socket b8.3 is a long hole. Through relative movement, the center of the socket a7.5 can be made coaxial with the center of any socket b8.3 and the movable plug rod 10.7.

[0047] The locking device 11 includes a fixing nut 11.1 located on the side tube b7.3, an eyebolt 11.2 threadedly connected to the fixing nut 11.1 and penetrating the side tube b7.3, and the eyebolt 11.2 threadedly connected to the locking nut 11.3 located above the fixing nut 11.1. After the side tube 8.2 extends outward from the side tube b7.3 for a certain distance, the front and rear bases bear the weight, which will inevitably cause the side tube 8.2 to tilt at a small angle. In order to avoid this situation, an eyebolt 11.2 and a fixing nut 11.1 are provided, and the eyebolt 11.2 is used to compress the side tube 8.2 extending into the side tube b7.3, so that the side tube 8.2 and the side tube b7.3 cannot move relative to each other, so that the side tube 8.2 will not tilt and the structure will be more stable.

[0048] The buffer plate includes a fixed buffer support plate 12.1, a movable buffer support plate a12.2 and a movable buffer support plate b12.3 that can be spliced ​​and matched. The fixed buffer support plate 12.1 is fixed to the middle of the middle base 7, the relatively arranged movable buffer support plates a12.2 are located on both sides of the middle base 7, and the relatively arranged movable buffer support plates b12.3 are respectively fixed to the front base 8 and the rear base 9. The middle base 7 is provided with a slide rail 7.6, and the movable buffer support plate b12.3 is slidably connected to the slide rail 7.6; the middle base 7 is provided with a bent plate 5 with a hole on both sides, and the slat 1 connected to the movable buffer support plate a12.2 is movably arranged on the bent plate 5 with a hole;

[0049] The fixed buffer support plate 12.1, the movable buffer support plate a12.2 and the movable buffer support plate b12.3 are all non-metallic plates with a double-layer structure. The upper and lower layers of non-metallic plates are EVA foam plates and PVC foam plates respectively. The above-mentioned foam plates have a certain flexibility to avoid direct ultra-rigid contact between the carrier base and the transported products. When bumps occur, damage to the products caused by rigid contact is avoided, and a buffering and protective effect is provided to the products.

[0050] Both ends of the front base 8 and the rear base 9 are provided with a panel 13 for limiting the vertical pipe 14. The bottom of the vertical pipe 14 is rotatably connected to the panel 13. The top of the vertical pipe 14 is provided with a plug 15. The bottom of the panel 13 is provided with a foot 16. When the material racks are stacked up and down, the plug 15 of the bottom material rack is plugged and matched with the foot 16 of the top material rack. Fig.15 As shown, the space above the material rack is effectively utilized, the plug 15 and the foot 16 are detachably plugged, and the material rack at the top can be separated from the bottom material rack. When the material rack is not in use, it can also be stacked up and down for storage, such as Fig.16As shown, when storing, the vertical pipe 14 can be rotated to a horizontal state and parked on the front base 8 and the rear base 9, and the bottom of the enclosure 13 of the top material rack can be parked on the top of the enclosure 13 of the bottom material rack, so as to achieve the stacking of the material rack at a lower height and improve the space utilization.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A retractable and adjustable material carrier, characterized in that: The invention comprises a telescopic base and a buffer plate arranged on the telescopic base, wherein the telescopic base comprises a middle base (7) and a front base (8) and a rear base (9) movably arranged on both sides of the middle base (7), wherein the front base (8) and the rear base (9) are both provided with a bent plate (5) with a hole, and a slat (1) is movably arranged on the bent plate (5) with a hole, and the slat (1) is provided with a limit device a (2), a limit device b (3), a pressing device (4) and a rotation limit device (6), and the middle base (7) is provided with a lock (10) and a locking device (11) for fixing the front base (8) and the rear base (9).

2. The telescopically adjustable material carrier according to claim 1, characterized in that: The limiting device a (2) comprises a fixed bent plate a (2.2) fixed on the slat (1), a limiting plate (2.6) fixed in the middle of the fixed bent plate a (2.2), a column (2.7) passing through the fixed bent plate a (2.2) and the limiting plate (2.6), a mounting plate (2.8) fixed at the bottom of the column (2.7), a plurality of plungers (2.9) for penetrating holes a (2.4) and holes b (2.5) provided at the bottom of the mounting plate (2.8), and a plurality of holes a (2.4) and a plurality of holes b (2.5) are provided at the bottom of the mounting plate (2.8). and hole b (2.5) are respectively arranged on the slat (1) and the bent plate with hole (5); a spring a (2.10) is arranged outside the column (2.7); the spring a (2.10) is located between the limit plate (2.6) and the mounting plate (2.8); a guide plate a (2.11) is arranged on the column (2.7); a guide hole (2.3) cooperating with the guide plate a (2.11) is opened on the fixed bent plate a (2.2); and a handle pin a (2.1) is arranged on the column (2.7).

3. The telescopically adjustable material carrier according to claim 1, characterized in that: The limiting device b (3) comprises a vertical limiting surface (3.1) whose bottom is fixed on the slat (1), and the top of the vertical limiting surface (3.1) is connected to an inclined guiding inclined surface (3.2).

4. The telescopically adjustable material carrier according to claim 1, characterized in that: The rotation limiting device (6) comprises a telescopic limiting device fixed on a bottom plate (6.1), wherein the bottom plate (6.1) is arranged on the slat (1) via a bolt assembly a, the bottom plate (6.1) is provided with an arc-shaped side end, and the arc-shaped side end is provided with a sawtooth a (6.15), the sawtooth a (6.15) can be engaged with a sawtooth b on a tooth plate (6.16), and the tooth plate (6.16) is arranged on the slat (1) via a bolt assembly b; The telescopic limiting device comprises a fixed curved plate b (6.2) fixed on the bottom plate (6.1), an angle steel (6.3) fixed to the open end of the fixed curved plate b (6.2), a sliding curved plate (6.4) slidably connected to the fixed curved plate b (6.2), long waist holes (6.5) opened on both sides of the sliding curved plate (6.4), a guide bolt (6.6) passing through and connecting the long waist holes (6.5) and the fixed curved plate b (6.2), the end of the guide bolt (6.6) being threadedly connected to a locking nut, and a sleeve (6.7) opening The mouth end passes through the fixed bent plate b (6.2), the other end of the sleeve (6.7) is fixed on the sliding bent plate (6.4), the screw (6.8) passing through the angle steel (6.3) is threadedly connected to the internal thread of the sleeve (6.7), and a rotation driving mechanism is provided at the end of the screw (6.8), the top of the guide plate b (6.13) is fixed to the sleeve (6.7), the end of the guide plate b (6.13) is fixed to the sliding bent plate (6.4), and the guide plate b (6.13) passes through and is movably connected to the fixed bent plate b (6.2).

5. The telescopically adjustable material carrier according to claim 4, characterized in that: The rotary drive mechanism is a manual rotary drive mechanism, comprising a butterfly nut (6.12) threadedly connected to the end of a screw rod (6.8), a limit pin a passing through the butterfly nut (6.12) and extending into the screw rod (6.8), the screw rod (6.8) passing through a gasket a (6.11) and a gasket b (6.14), the gasket a (6.11) and the gasket b (6.14) respectively affixed to two sides of the angle steel (6.3), the stop pin (6.10) on the screw rod (6.8) contacts the surface of the gasket a (6.11), the side of the gasket b (6.14) affixes to the limit nut (6.9), and the screw rod (6.8) passes through and is threadedly connected to the limit nut (6.9).

6. The telescopically adjustable material carrier according to claim 1, characterized in that: The middle base (7) comprises square tubes with openings at both ends and arranged in parallel, and adjacent square tubes are connected via connecting rods a (7.4). The square tubes comprise a middle square tube (7.1), and side square tubes a (7.2) and side square tubes b (7.3) symmetrically distributed on both sides of the middle square tube (7.1), and the two ends of the bent plate with holes (5) are connected to the side square tubes b (7.3) and the side square tubes a (7.2) respectively. The front base (8) and the rear base (9) both comprise a connecting rod b (8.1) and a plurality of bent plates with holes (5) vertically connected to the connecting rod b (8.1); side tubes (8.2) are provided at both ends of the connecting rod b (8.1); the plurality of bent plates with holes (5) are respectively plugged into and matched with the middle square tube (7.1) and the side square tube a (7.2); and the side tube (8.2) is plugged into and matched with the side square tube b (7.3).

7. The telescopically adjustable material carrier according to claim 6, characterized in that: The lock (10) comprises a cross-shaped plate (10.3) fixed on the side tube b (7.3), a limit plate (10.4) fixed on the cross-shaped plate (10.3), a movable plug rod (10.7) penetrating and movably connecting the cross-shaped plate (10.3) and the limit plate (10.4), an end of the movable plug rod (10.7) being inserted and matched with a socket a (7.5) on the side tube b (7.3) and a socket b (8.3) on the side tube (8.2), and a movable plug rod (10.7) being fixed on the side tube b (7.3). A limit pin b (10.8) is fixed, a spring b (10.6) is sleeved on the movable plug rod (10.7), the spring b (10.6) is located between the limit pin b (10.8) and the limit plate (10.4), a baffle (10.1) is provided on the movable plug rod (10.7), a clearance hole (10.2) is opened on the cross plate (10.3), the baffle (10.1) is detachable and movably cooperates with the clearance hole (10.2), and a handle pin b (10.5) is provided on the movable plug rod (10.7); The plurality of sockets b (8.3) are located on the same straight line, the socket a (7.5) is a round hole, and the socket b (8.3) is a long hole. The center of the socket a (7.5) can be made coaxial with the center of any socket b (8.3) and the movable plug rod (10.7) through relative movement.

8. The telescopically adjustable material carrier according to claim 6, characterized in that: The locking device (11) comprises a fixing nut (11.1) located on the lateral tube b (7.3), a lifting eye bolt (11.2) threadedly connected to the fixing nut (11.1) and penetrating the lateral tube b (7.3), and the lifting eye bolt (11.2) threadedly connected to the locking nut (11.3) located above the fixing nut (11.1).

9. The telescopically adjustable material carrier according to claim 1, characterized in that: The buffer plate comprises a fixed buffer support plate (12.1), a movable buffer support plate a (12.2) and a movable buffer support plate b (12.3) which can be spliced ​​and matched. The fixed buffer support plate (12.1) is fixed to the middle of the middle base (7), the movable buffer support plates a (12.2) arranged oppositely are located on both sides of the middle base (7), and the movable buffer support plates b (12.3) arranged oppositely are respectively fixed to the front base (8) and the rear base (9), the middle base (7) is provided with a slide rail (7.6), and the movable buffer support plate b (12.3) is slidably connected to the slide rail (7.6); the middle base (7) is provided with a bent plate with a hole (5) on both sides, and the slats (1) connected to the movable buffer support plate a (12.2) are movably arranged on the bent plate with a hole (5); The fixed buffer support plate (12.1), the movable buffer support plate a (12.2) and the movable buffer support plate b (12.3) are all non-metal plates with an upper and lower double-layer structure.

10. The telescopically adjustable material carrier according to claim 1, characterized in that: Both ends of the front base (8) and the rear base (9) are provided with a panel (13) for limiting the position of the vertical pipe (14); the bottom of the vertical pipe (14) is rotatably connected to the panel (13); the top of the vertical pipe (14) is provided with a plug (15); and the bottom of the panel (13) is provided with a foot (16).

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