阅读说明：本技术 一种料架 (Material rack ) 是由 陈旭英 李曦 斯建明 于 2021-08-02 设计创作，主要内容包括：本发明属于料架技术领域,尤其涉及一种料架,它包括下摆支撑板、折叠连杆、上摆支撑板、后支撑架、前支撑架、行走机构、锁死机构,本发明设计的料架在收集或者打开的时候,不需要将各个支撑板单独拆下或者安装,只需要同时推动或者拉动前支撑架和后支撑架,使得前后支撑架同时受力来挤压或者拉动,使得折叠连杆折叠,在前支撑架与后支撑架贴合后,前支撑架上的第一支撑横梁也正好失去了对下摆支撑板的支撑作用,此时在下摆支撑板下摆过程种或上摆支撑板下摆过程种的重力作用下,下摆支撑板和上摆支撑板向上或者向下摆动进行收起或者打开,使用起来比较方便、快捷,效率相对较高。(The invention belongs to the technical field of material racks, and particularly relates to a material rack which comprises a lower swing support plate, a folding connecting rod, an upper swing support plate, a rear support frame, a front support frame, a traveling mechanism and a locking mechanism Fast and high efficiency.)

1. The utility model provides a work or material rest which characterized in that: the folding type tooth-locking mechanism comprises a lower swing support plate, a folding connecting rod, an upper swing support plate, a rear support frame, a front support frame, a traveling mechanism and a locking mechanism, wherein two hooks are symmetrically arranged on two sides of the upper end of the rear support frame, two transmission plates are symmetrically and slidably arranged on the inner side of the rear support frame, and a plurality of sections of teeth are arranged on the transmission plates from top to bottom; the two first rotating shafts are distributed up and down and rotatably arranged on the rear supporting frame, the four first gears are fixedly arranged on the two first rotating shafts, and the four first gears are meshed with corresponding tooth areas on the two transmission plates; the two third rotating shafts are vertically distributed and rotatably arranged on the rear supporting frame, the four third gears are fixedly arranged on the two third rotating shafts, and the four third gears are meshed with corresponding tooth areas on the two transmission plates;

two U-shaped first supporting cross beams and two U-shaped second supporting cross beams are arranged on the front supporting frame from top to bottom, the two first supporting cross beams and the two second supporting cross beams are alternately distributed from top to bottom, and the second supporting cross beams positioned in the middle are positioned on the upper sides of the first supporting cross beams and are close to each other; the front support frame and the rear support frame are connected through four folding connecting rods which can be folded upwards;

the two lower swing supporting plates are arranged on the rear supporting frame in a swinging mode through two first rotating shafts; the lower swing supporting plate comprises an upper supporting plate, a sliding supporting plate and a lower chassis, wherein one end of the lower chassis is arranged on the corresponding first rotating shaft in a swinging mode, one end of the upper supporting plate is arranged on the upper side of the lower chassis in a swinging mode, and a third volute spiral spring is arranged between the upper supporting plate and the lower chassis; a locking structure consisting of a locking plate and a locking groove is arranged between the upper support plate and the lower bottom frame; the lower underframe is matched with a first supporting beam on the front support;

the two upper swing support plates are arranged on the rear support frame in a swinging mode through two third rotating shafts, three second locking grooves are formed in one end, away from the third rotating shafts, of each upper swing support plate along the width direction, the two upper swing support plates are matched with the two second support cross beams on the front support frame, three second locking plates are uniformly arranged on the inner side of each second support cross beam in the two second support cross beams of the front support frame in a vertical sliding mode along the width direction, the three second locking plates on the inner sides of the same second support cross beam are fixedly connected through one transmission cross rod, the two transmission cross rods distributed vertically are fixedly connected through the two transmission vertical rods, and two hooks are fixedly arranged at the upper ends of the two transmission vertical rods and penetrate through the upper end face of the front support frame; the six second locking plates are correspondingly matched with the six locking grooves formed in the two upper swing supporting plates one by one; the first rotating shaft and the third rotating shaft are distributed on the rear supporting frame in a front-back staggered manner, and the upper swing supporting plate and the lower swing supporting plate are mutually attached in a front-back manner after being folded and closed;

notches which are uniformly distributed and aligned up and down are formed in the upper supporting plate and the lower underframe of the lower swing supporting plate along the width direction, notches which are uniformly distributed are formed in the upper swing supporting plate along the width direction, and the notches in the upper swing supporting plate and the lower swing supporting plate are mutually distributed in a staggered manner;

two traveling mechanisms are symmetrically arranged on the lower sides of the front support frame and the rear support frame, and a locking mechanism for locking the two traveling mechanisms arranged on the front support frame and the rear support frame is respectively arranged on the front support frame and the rear support frame;

the walking mechanism comprises a fixed support, a rotating bracket and walking wheels, wherein the fixed support is fixedly arranged on the front support frame and the rear support frame; a support shaft is rotatably arranged on the rotary bracket, and the two travelling wheels are symmetrically arranged on the support shaft;

the locking mechanism comprises a first pull rope, a reset spring, a pedal, a swing plate, a limiting fixture block, a hinged support lug, a slide block, a guide rail, friction plates and second pull ropes, wherein one ends of the two friction plates with elasticity are respectively fixedly arranged on the rotary supports in the two corresponding travelling mechanisms, the other ends of the two friction plates are fixedly arranged with the two second pull ropes after bypassing the corresponding support shafts, and the two second pull ropes are connected through the first pull ropes after penetrating into the rear support frame and the front support frame; one end of the pedal is provided with a second inclined surface, a step surface is arranged between the second inclined surface and the bottom surface of the pedal, the pedal is slidably mounted on the side surfaces of the front support frame and the rear support frame, and a return spring is mounted between the pedal and the front support frame and between the pedal and the rear support frame; the two guide rails are fixedly arranged on the front support frame and the rear support frame, one end of the sliding block is provided with a first inclined surface, the sliding block is arranged between the two guide rails in a sliding manner, and the first inclined surface is matched with a second inclined surface on the corresponding pressure plate; the sliding block is provided with a hinge support lug, the lower end of the swing plate is hinged on the hinge support lug, and a second volute spiral spring is arranged between the swing plate and the hinge support lug; the swing plate is fixedly provided with a limiting fixture block, the hinged support lug is provided with two fixture blocks, and the two fixture blocks are matched with the limiting fixture block on the swing plate; the first pull rope penetrates through the front support frame and the rear support frame to be fixedly connected with the swing plate, the downward swinging angle of the swing plate is smaller than the upward swinging angle under the matching of the limiting fixture block and the two fixture blocks, and the position of the first pull rope penetrating through the front support frame and the rear support frame and the swinging shaft of the swing plate are positioned on the same horizontal plane; when the swing plate swings to the maximum, the connecting point of the first pull rope and the side face of the swing plate is higher than the swing shaft of the swing plate, and the angle of the swing plate in the maximum upward swinging state is larger than that in the maximum downward swinging state.

2. The stack of claim 1, wherein: the four second rotating shafts are arranged in pairs and are arranged on two sides of the rear supporting frame in a vertical distribution and rotating mode, four second gears are arranged on the four second rotating shafts, and the four second gears are meshed with corresponding tooth areas on the two transmission plates; four first scroll springs are arranged between the four second rotating shafts and the rear support frame; four installation shells for protecting the four first scroll springs are symmetrically installed on two sides of the rear support frame.

3. The stack of claim 2, wherein: the folding connecting rod consists of two connecting rods which are hinged with each other, one end of each connecting rod is hinged to a corresponding second rotating shaft, and the other end of each connecting rod is hinged to the front supporting frame; eight limiting blocks which limit the downward swinging of the eight connecting rods arranged on the front supporting frame and the rear supporting frame are arranged on the front supporting frame and the rear supporting frame, and after the front supporting frame and the rear supporting frame are completely opened, two mutually hinged connecting rods form an included angle of 165 degrees and 175 degrees.

4. The stack of claim 1, wherein: above-mentioned chassis is kept away from first pivot one end down and is had three first locked groove along the even division of width direction, goes up the one end that the first pivot was kept away from to the backup pad along the even installation and three first locked plate in the width direction, three first locked plate and the cooperation of three first locked groove one-to-one.

5. The stack of claim 1, wherein: two second supporting beams on the front support are respectively provided with an installation sliding groove for the corresponding transmission cross rod to slide up and down.

6. The stack of claim 1, wherein: a trapezoidal sliding block is fixedly arranged on one side of the pedal, and the pedal is slidably arranged on the front supporting frame and the rear supporting frame through the trapezoidal sliding block; and the front support frame and the rear support piece are provided with mounting plates for fixing the return spring.

7. The stack of claim 1, wherein: two guide grooves are symmetrically formed in the two guide rails, two guide blocks are symmetrically arranged on two sides of the sliding block, and the sliding block is arranged between the two guide rails through the sliding fit of the two guide blocks and the two guide grooves.

8. The stack of claim 1, wherein: the rotating bracket of the traveling mechanism is provided with an installation groove for installing the friction plate.

9. The stack of claim 1, wherein: the second pull rope is connected with the first pull rope through a rotary connecting piece, and a sliding groove for the corresponding rotary connecting piece to slide is formed in the rotary support of the travelling mechanism.

10. The stack of claim 1, wherein: the rear support frame is provided with a guide plate which plays a role in guiding the transmission plate.

Technical Field

The invention belongs to the technical field of material racks, and particularly relates to a material rack.

Background

In the centralized transportation process, a movable material rack with wheels is commonly used, parts are placed on the material rack, the material rack is placed on a van truck, four wheels of the material rack are locked for transportation, when the material rack without the parts returns after unloading, the material rack without the parts is folded, and after folding, the inside of a carriage is equivalent to an empty box, and other goods can be transported, so that the transportation efficiency is improved; however, when the folding rack is folded, the supporting plate and the stop rod need to be taken down, then the supporting plate and the stop rod need to be vertically arranged at the front side and the rear side of the bracket, and finally the folding rack is folded through the folding side connecting rods, but the existing folding technology has the problem of low efficiency; four universal wheels are generally used for the four wheels of the last material rack to facilitate movement, locking of the universal wheels requires a space for an operator to perform actions, and each wheel is locked without too much space in the van.

The invention designs a material rack to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a material rack which is realized by adopting the following technical scheme.

A material rack comprises a lower swing support plate, a folding connecting rod, an upper swing support plate, a rear support frame, a front support frame, a traveling mechanism and a locking mechanism, wherein two hooks are symmetrically installed on two sides of the upper end of the rear support frame, two transmission plates are symmetrically and slidably installed on the inner side of the rear support frame, and a plurality of sections of teeth are arranged on the transmission plates from top to bottom; the two first rotating shafts are distributed up and down and rotatably arranged on the rear supporting frame, the four first gears are fixedly arranged on the two first rotating shafts, and the four first gears are meshed with corresponding tooth areas on the two transmission plates; the two third rotating shafts are distributed up and down and rotatably arranged on the rear supporting frame, the four third gears are fixedly arranged on the two third rotating shafts, and the four third gears are meshed with corresponding tooth areas on the two transmission plates.

Two U-shaped first supporting cross beams and two U-shaped second supporting cross beams are arranged on the front supporting frame from top to bottom, the two first supporting cross beams and the two second supporting cross beams are alternately distributed from top to bottom, and the second supporting cross beams positioned in the middle are positioned on the upper sides of the first supporting cross beams and are close to each other; the front support frame and the rear support frame are connected through four folding connecting rods which can be folded upwards.

The two lower swing supporting plates are arranged on the rear supporting frame in a swinging mode through two first rotating shafts; the lower swing supporting plate comprises an upper supporting plate, a sliding supporting plate and a lower chassis, wherein one end of the lower chassis is arranged on the corresponding first rotating shaft in a swinging mode, one end of the upper supporting plate is arranged on the upper side of the lower chassis in a swinging mode, and a third volute spiral spring is arranged between the upper supporting plate and the lower chassis; a locking structure consisting of a locking plate and a locking groove is arranged between the upper support plate and the lower bottom frame; the lower chassis is matched with the first supporting beam on the front bracket.

The two upper swing support plates are arranged on the rear support frame in a swinging mode through two third rotating shafts, three second locking grooves are formed in one end, away from the third rotating shafts, of each upper swing support plate along the width direction, the two upper swing support plates are matched with the two second support cross beams on the front support frame, three second locking plates are uniformly arranged on the inner side of each second support cross beam in the two second support cross beams of the front support frame in a vertical sliding mode along the width direction, the three second locking plates on the inner sides of the same second support cross beam are fixedly connected through one transmission cross rod, the two transmission cross rods distributed vertically are fixedly connected through the two transmission vertical rods, and two hooks are fixedly arranged at the upper ends of the two transmission vertical rods and penetrate through the upper end face of the front support frame; the six second locking plates are correspondingly matched with the six locking grooves formed in the two upper swing supporting plates one by one; the first rotating shaft and the third rotating shaft are distributed on the rear supporting frame in a front-back staggered mode, and the upper swing supporting plate and the lower swing supporting plate are attached to each other in a front-back mode after being folded and closed.

The upper supporting plate and the lower chassis of the lower swing supporting plate are provided with notches which are uniformly distributed and aligned up and down along the width direction, the upper swing supporting plate is provided with notches which are uniformly distributed along the width direction, and the notches on the upper swing supporting plate and the lower swing supporting plate are distributed in a staggered manner.

Two running mechanisms are symmetrically arranged on the lower sides of the front support frame and the rear support frame, and a locking mechanism for locking the two running mechanisms arranged on the front support frame and the rear support frame is respectively arranged on the front support frame and the rear support frame.

The walking mechanism comprises a fixed support, a rotating bracket and walking wheels, wherein the fixed support is fixedly arranged on the front support frame and the rear support frame; a supporting shaft is rotatably arranged on the rotating support, and the two walking wheels are symmetrically arranged on the supporting shaft.

The locking mechanism comprises a first pull rope, a reset spring, a pedal, a swing plate, a limiting fixture block, a hinged support lug, a slide block, a guide rail, friction plates and second pull ropes, wherein one ends of the two friction plates with elasticity are respectively fixedly arranged on the rotary supports in the two corresponding travelling mechanisms, the other ends of the two friction plates are fixedly arranged with the two second pull ropes after bypassing the corresponding support shafts, and the two second pull ropes are connected through the first pull ropes after penetrating into the rear support frame and the front support frame; one end of the pedal is provided with a second inclined surface, a step surface is arranged between the second inclined surface and the bottom surface of the pedal, the pedal is slidably mounted on the side surfaces of the front support frame and the rear support frame, and a return spring is mounted between the pedal and the front support frame and between the pedal and the rear support frame; the two guide rails are fixedly arranged on the front support frame and the rear support frame, one end of the sliding block is provided with a first inclined surface, the sliding block is arranged between the two guide rails in a sliding manner, and the first inclined surface is matched with a second inclined surface on the corresponding pressure plate; the sliding block is provided with a hinge support lug, the lower end of the swing plate is hinged on the hinge support lug, and a second volute spiral spring is arranged between the swing plate and the hinge support lug; the swing plate is fixedly provided with a limiting fixture block, the hinged support lug is provided with two fixture blocks, and the two fixture blocks are matched with the limiting fixture block on the swing plate; the first pull rope penetrates through the front support frame and the rear support frame to be fixedly connected with the swing plate, the downward swinging angle of the swing plate is smaller than the upward swinging angle under the matching of the limiting fixture block and the two fixture blocks, and the position of the first pull rope penetrating through the front support frame and the rear support frame and the swinging shaft of the swing plate are positioned on the same horizontal plane; when the swing plate swings to the maximum, the connecting point of the first pull rope and the side face of the swing plate is higher than the swing shaft of the swing plate, and the angle of the swing plate in the maximum upward swinging state is larger than that in the maximum downward swinging state. The first pull cord does not interfere with the hinged position of the swing plate, and the mounting of the swing plate and the first pull cord can be accomplished using known techniques.

As a further improvement of the technology, four second rotating shafts are arranged in pairs and are arranged on two sides of the rear supporting frame in a vertical distribution and rotating mode, four second gears are arranged on the four second rotating shafts, and the four second gears are meshed with corresponding tooth areas on the two transmission plates; four first scroll springs are arranged between the four second rotating shafts and the rear support frame; four installation shells for protecting the four first scroll springs are symmetrically installed on two sides of the rear support frame.

As a further improvement of the technology, the folding connecting rod is composed of two connecting rods hinged with each other, one end of each connecting rod is hinged with a corresponding second rotating shaft, and the other end of each connecting rod is hinged with the front supporting frame; eight limiting blocks which limit the downward swinging of the eight connecting rods arranged on the front supporting frame and the rear supporting frame are arranged on the front supporting frame and the rear supporting frame, and after the front supporting frame and the rear supporting frame are completely opened, two mutually hinged connecting rods form an included angle of 165 degrees and 175 degrees.

As a further improvement of the present technology, the end of the lower chassis, which is far away from the first rotating shaft, is uniformly opened along the width direction with three first locking grooves, the end of the upper supporting plate, which is far away from the first rotating shaft, is uniformly installed along the width direction with three first locking plates, and the three first locking plates are matched with the three first locking grooves in a one-to-one correspondence manner.

As a further improvement of the technology, two second supporting cross beams on the front support are respectively provided with an installation sliding groove for the corresponding transmission cross rod to slide up and down.

As a further improvement of the technology, a trapezoidal sliding block is fixedly arranged on one side of the pedal, and the pedal is slidably arranged on the front supporting frame and the rear supporting frame through the trapezoidal sliding block; and the front support frame and the rear support piece are provided with mounting plates for fixing the return spring.

As a further improvement of the technology, the two guide rails are symmetrically provided with two guide grooves, two guide blocks are symmetrically arranged on two sides of the sliding block, and the sliding block is arranged between the two guide rails through the sliding fit of the two guide blocks and the two guide grooves.

As a further improvement of the technology, the rotating bracket of the traveling mechanism is provided with an installation groove for installing the friction plate.

In a further improvement of the present technology, the second rope and the first rope are connected by a rotation link, and a sliding groove for sliding the corresponding rotation link is formed in a rotation bracket of the traveling mechanism.

As a further improvement of the present technology, a guide plate for guiding the transmission plate is mounted on the rear support frame.

Compared with the traditional material rack technology, the invention has the following beneficial effects:

1. when the front and rear supporting frames are manually pushed to be folded, the folding connecting rod is forced to swing upwards to trigger the two lower swing supporting plates to swing downwards, the two lower swing supporting plates can be influenced by self gravity in the swinging process, the two first rotating shafts are rotated and pressed to drive auxiliary force through the self gravity of the two lower swing supporting plates, then the auxiliary force is transmitted to the upper swing supporting plates through the gears and the transmission plates, the upper swing supporting plates are assisted to swing upwards to be folded, and the effect of saving labor when the material rack is manually pushed to be folded is achieved; when the support frame is opened around the artificial pulling, folding connecting rod atress swings downwards and triggers two and go up the pendulum backup pad and swing downwards, and two go up the pendulum backup pad and can receive the influence of self gravity at swing in-process, and through two go up the pendulum backup pad and assist the lower pendulum backup pad and swing upwards and strut, under this kind of state, the gravity of going up the pendulum backup pad passes through on gear and driving plate transmit the lower pendulum backup pad, also can reach laborsaving effect when artificial pulling work or material rest is opened equally.

2. When goods are placed on the lower hem support plate, the goods can press the upper support plate downwards, so that a first lock plate on the upper support plate is matched with a first lock groove on the lower bottom frame; when the material rack is lifted by the lifting mechanism, the two transmission vertical rods can firstly move upwards relative to the front supporting frame under the action of the gravity of the material rack and goods placed on the material rack, so that the lower end of the second locking plate is inserted into the corresponding second locking groove, the upper swing supporting plate and the second supporting cross beam are locked, and the situation that the stop rod and the supporting plate are crushed due to the overlarge weight of parts in the lifting process and are folded during lifting can be prevented, and safety accidents are caused.

3. When the material rack designed by the invention is collected or opened, the support plates do not need to be detached or installed independently, only the front support frame and the rear support frame need to be pushed or pulled simultaneously, so that the front support frame and the rear support frame are extruded or pulled simultaneously under stress, the folding connecting rod is folded, and after the front support frame and the rear support frame are attached, the first support cross beam on the front support frame just loses the support effect on the lower swing support plate.

4. According to the invention, the locking mechanism is designed on the travelling mechanism, after the material rack is placed on a truck, the two travelling mechanisms on the same side are locked by the locking mechanism, so that the material rack is prevented from sliding in a truck box in the transportation process, and the goods on the material rack can be prevented from falling; the locking mechanism is executed only by stepping on the pedal and the swinging plate by an operator, and the required space is small.

5. The upper swing support plate and the lower swing support plate can swing simultaneously when being folded and unfolded and are in transmission connection through the gear and the transmission plate, so that the situation that the upper swing support plate and the lower swing support plate are mutually influenced can occur in the swinging process.

Drawings

Fig. 1 is an external view of an entire part.

Fig. 2 is a schematic view of the overall component distribution.

FIG. 3 is a first shaft mounting schematic.

Fig. 4 is a second shaft mounting schematic.

Fig. 5 is a schematic view of the third shaft installation.

Fig. 6 is a schematic view of the mounting of the running gear and the locking gear.

Fig. 7 is an external view of the skirt support plate.

FIG. 8 is a schematic view of a skirt support plate configuration.

Fig. 9 is a schematic view of a folding linkage.

Fig. 10 is a schematic diagram of the structure of the upper swing supporting plate.

Fig. 11 is a schematic view of the front support frame structure.

Fig. 12 is a schematic view of the internal structure of the front support frame.

Fig. 13 is a schematic connection diagram of two walking mechanisms on the same side.

Fig. 14 is a schematic view of the deadlocking mechanism.

Fig. 15 is an external view of the rear support frame.

FIG. 16 is a drive plate installation schematic.

Fig. 17 is a schematic view of the working principle of the upper swing support plate and the lower swing support plate.

Number designation in the figures: 1. a lower hem support plate; 2. folding the connecting rod; 3. an upper swing support plate; 4. a rear support frame; 5. a front support frame; 6. a traveling mechanism; 7. a first gear; 8. a first scroll spring; 9. a first rotating shaft; 10. mounting a shell; 11. a second gear; 12. a second rotating shaft; 13. a limiting block; 14. a third gear; 15. a third rotating shaft; 16. a locking mechanism; 17. an upper support plate; 18. a first lock plate; 19. a lower chassis; 20. a first locking groove; 21. a third scroll spring; 22. a second locking groove; 29. a connecting rod; 30. a first support beam; 31. a second support beam; 32. a drive rail; 33. installing a chute; 34. a driving vertical rod; 35. a second lock plate; 36. hooking; 37. a first pull cord; 38. a first inclined plane; 39. a trapezoidal slider; 40. mounting a plate; 41. a return spring; 42. a second inclined plane; 43. a pedal; 44. a swinging plate; 45. a limiting clamping block; 46. a clamping block; 47. a hinged lug; 48. a slider; 49. a guide block; 50. a guide groove; 51. a guide rail; 52. fixing and supporting; 53. a sliding groove; 54. rotating the bracket; 55. a second scroll spring; 56. mounting grooves; 57. a traveling wheel; 58. a support shaft; 59. a friction plate; 60. a second pull cord; 61. a rotating connector; 62. a drive plate; 63. a guide plate.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples or figures are illustrative of the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 and 2, the folding chair comprises a lower swing support plate 1, a folding connecting rod 2, an upper swing support plate 3, a rear support frame 4, a front support frame 5, a walking mechanism 6 and a locking mechanism 16, wherein as shown in fig. 3 and 16, two hooks 36 are symmetrically arranged on two sides of the upper end of the rear support frame 4, as shown in fig. 16, two transmission plates 62 are symmetrically and slidably arranged on the inner side of the rear support frame 4, and a plurality of sections of teeth are arranged on the transmission plates 62 from top to bottom; as shown in fig. 3 and 16, two first rotating shafts 9 are vertically distributed and rotatably mounted on the rear support frame 4, four first gears 7 are fixedly mounted on the two first rotating shafts 9, and the four first gears 7 are meshed with corresponding tooth areas on the two transmission plates 62; as shown in fig. 5 and 16, two third rotating shafts 15 are distributed vertically and rotatably mounted on the rear support frame 4, four third gears 14 are fixedly mounted on the two third rotating shafts 15, and the four third gears 14 are engaged with corresponding tooth areas on the two transmission plates 62.

As shown in fig. 1 and 11, two U-shaped first supporting beams 30 and two second supporting beams 31 are mounted on the front support frame 5 from top to bottom, the two first supporting beams 30 and the two second supporting beams 31 are alternately distributed from top to bottom, and the second supporting beams 31 located in the middle are located on the upper sides of the first supporting beams 30 and close to each other; as shown in fig. 1, the front support frame 5 and the rear support frame 4 are connected by four folding links 2 that can be folded upward.

As shown in fig. 1 and 3, two lower swing support plates 1 are installed on a rear support frame 4 in a swinging mode through two first rotating shafts 9; as shown in fig. 7, the lower swing support plate 1 comprises an upper support plate 17, a sliding support plate, and a lower chassis 19, wherein one end of the lower chassis 19 is installed on the corresponding first rotating shaft 9 in a swinging manner, as shown in fig. 8, one end of the upper support plate 17 is installed on the upper side of the lower chassis 19 in a swinging manner, and a third spiral spring 21 is installed between the upper support plate 17 and the lower chassis 19; a locking structure consisting of a locking plate and a locking groove is arranged between the upper support plate 17 and the lower frame 19; the lower chassis 19 cooperates with a first support beam 30 on the front carrier.

As shown in fig. 1 and 5, the two upper swing support plates 3 are swing-mounted on the rear support frame 4 through two third rotating shafts 15, as shown in fig. 10, three second locking grooves 22 are formed at one end of the upper swing support plate 3 away from the third rotating shaft 15 along the width direction, two upper swing support plates 3 are matched with two second support cross beams 31 on the front support frame 5, as shown in fig. 11 and 12, three second lock plates 35 are slidably mounted on the inner side of each second support beam 31 of the two second support beams 31 of the front support frame 5 up and down uniformly along the width direction, and the three second locking plates 35 positioned at the inner side of the same second supporting beam 31 are fixedly connected through a transmission cross bar 32, the two transmission cross bars 32 distributed up and down are fixedly connected through two transmission vertical bars 34, as shown in fig. 16, the upper ends of the two driving vertical rods 34 penetrate through the upper end face of the front support frame 5 and are fixedly provided with two hooks 36; the six second locking plates 35 are correspondingly matched with the six locking grooves formed in the two upper swing support plates 3 one by one; the first rotating shaft 9 and the third rotating shaft 15 are distributed on the rear supporting frame 4 in a front-back staggered mode, and after the upper swing supporting plate 3 and the lower swing supporting plate 1 are folded and closed, the upper swing supporting plate 3 and the lower swing supporting plate 1 are attached to each other in a front-back mode.

As shown in fig. 7 and 10, the upper support plate 17 and the lower chassis 19 of the lower swing support plate 1 are formed with notches aligned vertically and uniformly distributed along the width direction, the upper swing support plate 3 is formed with notches uniformly distributed along the width direction, and the notches of the upper swing support plate 3 and the lower swing support plate 1 are arranged in a staggered manner.

In the invention, the upper swing support plate 3 and the lower swing support plate 1 positioned in the middle of the four support plates are close to each other, and a space for allowing the two lower swing support plates 1 to swing downwards and the two upper swing support plates 3 to swing upwards is arranged between the other two upper swing support plates 3 and the lower swing support plates 1 and the upper swing support plate 3 and the lower swing support plate 1 positioned in the middle.

In the folding and unfolding processes, the upper swing support plate 3 and the lower swing support plate 1 can swing at the same time and are in transmission connection with each other through the gear and the transmission plate 62, so that the situation that the upper swing support plate 3 and the lower swing support plate 1 influence each other can occur in the swinging process.

The folding connecting rod 2 designed in the invention has a connecting effect on the front support frame 5 and the rear support frame 4.

As shown in fig. 1 and 15, two traveling mechanisms 6 are symmetrically installed on the lower sides of the front support frame 5 and the rear support frame 4, and a locking mechanism 16 for locking the two traveling mechanisms 6 installed on the front support frame 5 and the rear support frame 4 is installed on each of the front support frame 5 and the rear support frame 4.

As shown in fig. 14, the traveling mechanism 6 includes a fixed support 52, a rotating bracket 54, and a traveling wheel 57, wherein the fixed support 52 is fixedly mounted on the front support frame 5 and the rear support frame 4; a supporting shaft 58 is rotatably mounted on the rotating bracket 54, and two traveling wheels 57 are symmetrically mounted on the supporting shaft 58. The running gear 6 designed by the invention is a universal wheel mechanism.

As shown in fig. 13 and 14, the locking mechanism 16 includes a first rope 37, a return spring 41, a pedal 43, a swing plate 44, a limit latch 45, a latch 46, a hinge lug 47, a slider 48, a guide rail 51, friction plates 59, and second ropes 60, wherein one end of each of the two friction plates 59 with elasticity is respectively and fixedly mounted on the corresponding rotary bracket 54 of the two traveling mechanisms 6, the other end of each of the two friction plates 59 is fixedly mounted with two second ropes 60 after passing around the corresponding support shaft 58, and the two second ropes 60 penetrate through the rear support frame 4 and the front support frame 5 and are connected by the first rope 37; one end of the pedal 43 is provided with a second inclined surface 42, a step surface is arranged between the second inclined surface 42 and the bottom surface of the pedal 43, the pedal 43 is slidably mounted on the side surfaces of the front support frame 5 and the rear support frame 4, and a return spring 41 is mounted between the pedal 43 and the front support frame 5 and the rear support frame 4; the two guide rails 51 are fixedly arranged on the front support frame 5 and the rear support frame 4, one end of the sliding block 48 is provided with a first inclined surface 38, the sliding block 48 is arranged between the two guide rails 51 in a sliding manner, and the first inclined surface 38 is matched with a second inclined surface 42 on the corresponding pressure plate; a hinge support lug 47 is arranged on the sliding block 48, the lower end of the swing plate 44 is hinged on the hinge support lug 47, and a second scroll spring 55 is arranged between the swing plate 44 and the hinge support lug 47; a limiting fixture block 45 is fixedly arranged on the swinging plate 44, two fixture blocks 46 are arranged on the hinged support lug 47, and the two fixture blocks 46 are matched with the limiting fixture block 45 on the swinging plate 44; the first pull rope 37 penetrates through the front support frame 5 and the rear support frame 4 to be fixedly connected with the swing plate 44, the downward swing angle of the swing plate 44 is smaller than the upward swing angle under the matching of the limiting fixture block 45 and the two fixture blocks 46, and the position of the first pull rope 37 penetrating through the front support frame 5 and the rear support frame 4 is positioned on the same horizontal plane with the swing shaft of the swing plate 44; when the swing plate 44 swings to the maximum, the connecting point of the first pull rope 37 and the side surface of the swing plate 44 is higher than the angle of the swing shaft swing plate 44 of the swing plate 44 in the maximum upward swinging state and is larger than the angle in the maximum downward swinging state, so that the dragging degree of the swing plate 44 to the first pull rope 37 in the maximum upward swinging state can be ensured to be smaller than the dragging degree of the swing plate 44 to the first pull rope 37 in the maximum downward swinging state, the dragging degree of the swing plate 44 to the first pull rope 37 in the maximum upward swinging state is not enough to lock the traveling mechanism 6, and the dragging degree of the swing plate 44 to the first pull rope 37 in the maximum downward swinging state is enough to lock the traveling mechanism 6.

When the first pull rope 37 is pulled, the first pull rope 37 pulls the two corresponding second pull ropes 60 through the rotary connecting piece 61, the second pull ropes 60 pull the friction plates 59 to swing, so that the friction plates 59 are tightly pressed on the corresponding supporting shafts 58, and the traveling mechanism 6 is locked through friction between the friction plates 59 and the supporting shafts 58.

In the initial state of the present invention, under the elasticity of the friction plate 59 and the action of the second scroll spring 55, the swing plate 44 swings upward, and the friction plate 59 and the support shaft 58 are in a released state; the locking mechanism 16 does not lock the traveling mechanism 6, the fourth inclined surface of the slider 48 is positioned at the lower side of the third inclined surface on the pedal 43, and the slider 48 cannot slide towards one side of the third inclined surface relative to the pedal 43; when the running mechanism 6 needs to be locked in use, the swing plate 44 is collapsed downwards, so that the swing plate 44 swings downwards, the swing plate 44 swings downwards to pull the first pull rope 37, after the swing plate 44 swings to a horizontal state, the pulled stroke of the first pull rope 37 is maximum, when the swing plate continues to swing downwards, the first pull rope 37 is still in a pulled state relative to the initial state, the friction plate 59 can lock the running mechanism 6 in the state, in this state, the first pull rope 37 applies downward pulling force to the swing plate 44, because the elastic force of the second scroll spring 55 is small, the swing plate 44 cannot automatically swing upwards and return under the action of the second scroll spring 55, the pulling force of the swing plate 44 to the first pull rope 37 in the swinging state is larger than that of the swing plate 44 in the swinging state, the fourth inclined surface of the slide block 48 is located below the third inclined surface on the pedal 43, and the side end surface of the slide block 48 is in contact with the side end surface of the third inclined surface of the pedal 43, the slider 48 does not slide toward the third slope side with respect to the pedal 43; when the lock is released, the pedal 43 is stepped downwards, so that the pressing plate moves downwards, the third inclined surface is matched with the fourth inclined surface, finally, the sliding block 48 moves a certain distance towards the first pull rope 37 under the pulling force of the first pull rope 37, the pulling force of the first sliding block 48 on the first pull rope 37 is greatly reduced, and the swinging plate 44 can overcome the residual small pulling force of the first pull rope 37 to swing upwards to reset in a horizontal state under the action of the second scroll spring 55, and finally is located in the uppermost state. When the pedal 43 is released from being pressed down, the pedal 43 presses the slider 48 to the initial state through the third inclined surface and the fourth inclined surface under the action of the return spring 41, the first pull rope 37 is pulled by the swing plate 44 in the uppermost state along with the movement of the slider 48 in the pressing process, and the state that the traveling mechanism 6 is not locked is recovered.

As shown in fig. 4 and 16, four second rotating shafts 12 are arranged in pairs and are arranged on two sides of the rear supporting frame 4 in a vertical distribution manner, four second gears 11 are arranged on the four second rotating shafts 12, and the four second gears 11 are engaged with corresponding tooth areas on the two transmission plates 62; four first scroll springs 8 are arranged between the four second rotating shafts 12 and the rear support frame 4; four mounting cases 10 for protecting the four first volute springs 8 are symmetrically mounted on both sides of the rear support frame 4.

As shown in fig. 9, the folding connecting rod 2 is composed of two connecting rods 29 hinged to each other, one end of each connecting rod 29 is hinged to the corresponding second rotating shaft 12, and the other end of each connecting rod 29 is hinged to the front support frame 5; the front support frame 5 and the rear support frame 4 are provided with eight limit blocks 13 which play the role of limiting the downward swinging of the eight connecting rods 29 arranged on the front support frame and the rear support frame. After the front and rear support frames 4 are completely opened, the two connecting rods 29 hinged with each other form an included angle of 165-175 degrees. The effect of stopper 13 is to playing the limiting displacement of downward rocking to folding connecting rod 2, guarantees that two articulated connecting rods 29 each other become 165 and 175 degrees contained angle after front and back support frame 4 is opened completely, and folding connecting rod 2 can the upswing after the atress simultaneously.

In the invention, because the two connecting rods 29 in the folding connecting rod 2 can simultaneously swing upwards to fold when the folding connecting rod 2 is pressed and folded, and the two connecting rods 29 hinged with each other form an included angle of 165-175 degrees, the two connecting rods 29 are already folded upwards by a small angle in the fully unfolded state, in order to ensure that the folding of the folding connecting rod 2, the lower swing support plate 1 and the upper swing support plate 3 which are in transmission connection through the gear and the transmission plate 62 cannot influence each other when the material rack is folded, the diameter of the designed second gear 11 is slightly smaller than the diameter of the first gear 7 and the third gear 14.

As shown in fig. 7, three first lock grooves 20 are uniformly formed in the end of the lower chassis 19 away from the first rotating shaft 9 along the width direction, three first lock plates 18 are uniformly mounted on the end of the upper support plate 17 away from the first rotating shaft 9 along the width direction, and the three first lock plates 18 are correspondingly matched with the three first lock grooves 20.

As shown in fig. 11, the two second supporting beams 31 on the front bracket are respectively provided with a mounting chute 33 for the corresponding transmission cross bar 32 to slide up and down.

As shown in fig. 14, a trapezoidal slider 39 is fixedly mounted on one side of the pedal 43, and the pedal 43 is slidably mounted on the front support frame 5 and the rear support frame 4 through the trapezoidal slider 39; the front support 5 and the rear support are mounted with a mounting plate 40 for fixing a return spring 41.

As shown in fig. 14, two guide grooves 50 are symmetrically formed on the two guide rails 51, two guide blocks 49 are symmetrically installed on both sides of the slider 48, and the slider 48 is installed between the two guide rails 51 by the sliding fit of the two guide blocks 49 and the two guide grooves 50.

As shown in fig. 14, the rotary bracket 54 of the traveling mechanism 6 is provided with an installation groove 56 for installing a friction plate 59.

As shown in fig. 13 and 14, the second rope 60 and the first rope 37 are connected by a rotary joint 61, and a slide groove 53 for sliding the rotary joint 61 is formed in the rotary bracket 54 of the traveling mechanism 6.

As shown in fig. 16, a guide plate 63 for guiding the transmission plate 62 is attached to the rear bracket 4.

The specific working process is as follows: when the material rack designed by the invention is used, different methods can be adopted for use:

firstly, loading goods on a material rack on the ground, then hoisting the material rack and the goods on the material rack into a van through hoisting equipment on the van, and then manually entering the van to lock the traveling mechanisms 6 of the material racks in a trampling mode; when unloading, the locking of the travelling mechanism 6 is released, and then the material rack is pushed to move to a specified position; after unloading, the front brackets 5 of the apparatus are then pushed one by one to fold the apparatus up, as shown in fig. 17.

Secondly, the material rest is placed in a truck, goods are conveyed to the truck and then sequentially placed on the material rest, and the travelling mechanism 6 of the material rest is locked in a treading mode; sequentially placing goods on each material rack; during unloading, the goods on the material rack are manually carried down; after unloading, the front brackets 5 of the equipment are then pushed one by one to fold the equipment up, while the remaining space is available for transporting other things, as shown in fig. 17.

When goods are placed on the material rack, the goods can be pressed down on the upper support plate 17, the upper support plate 17 swings downwards relative to the lower chassis 19, and the first lock plate 18 on the upper support plate 17 is matched with the first lock groove 20 on the lower chassis 19; after the goods are placed, when the material rack is lifted upwards, the material rack is connected with four hooks 36 through lifting ropes and then lifted, when the goods rack is lifted, under the action of the gravity of the material rack and the goods placed on the material rack, two transmission vertical rods 34 can firstly move upwards relative to the front support frame 5, the two transmission vertical rods 34 move upwards to drive the two transmission cross rods 32 to move upwards, the two transmission cross rods 32 move upwards to drive the six second locking plates 35 on the transmission cross rods to move upwards, in the process of moving the second locking plates 35 upwards, the lower ends of the second locking plates 35 are inserted into the corresponding second locking grooves 22, the upper swing support plate 3 and the second support cross beam 31 are locked, and the situation that stop rods and support plates are crushed due to the overlarge weight of the parts in the lifting process and are folded during lifting can be prevented, and safety accidents are caused. After the upper swing support plate 3 and the second support cross beam 31 are locked, the two transmission cross rods 32 also move to the limit state, namely the hooks 36 arranged on the two transmission vertical plates move to the limit state, and at the moment, the four hooks 36 can transmit the pulling force of the lifting rope to the material rack.

When the material rack is folded, the front support frame 5 and the rear support frame are simultaneously stressed, the folding connecting rod 2 is stressed to swing upwards, in the swinging process, the connecting rod 29 arranged on the second rotating shaft 12 drives the corresponding second rotating shaft 12 to rotate, the second rotating shaft 12 rotates to drive the second gear 11 to rotate, the second gear 11 rotates to drive the transmission plate 62 to slide upwards, the transmission plate 62 slides upwards to drive the first gear 7 and the third gear 14 to rotate, the first gear 7 rotates to drive the upper support swing plate 44 to swing downwards, the third gear 14 rotates to drive the lower support swing plate 44 to swing upwards, in the swinging process, the two lower swing support plates 1 are influenced by self gravity, the two first rotating shafts 9 are rotationally pressed with driving auxiliary force through the self gravity of the two lower swing support plates 1, so that the two first rotating shafts 9 rotate to drive the four first gears 7 to rotate, the four first gears 7 rotate to drive the two transmission plates 62 to move upwards through the matching of tooth areas meshed with the four first gears 7, the two transmission plates 62 move upwards to drive the four second gears 11 and the four third gears 14 to rotate, the four second gears 11 rotate to drive the four second rotating shafts 12 to rotate, the four second rotating shafts 12 rotate to drive the four folding connecting rods 2 to fold, the four third gears 14 rotate to drive the two third rotating shafts 15 to rotate, and the two third rotating shafts 15 rotate to drive the two upper swing support plates 3 to swing upwards; the invention transmits the downward swinging force of the lower swing support plate 1 through the self gravity to the upper swing support plate 3 through the gear and the transmission plate 62, thereby achieving the effect of saving labor; when the folding type folding chair is opened, the upper swing support plate 3 swings downwards through self gravity, the lower swing support plate 1 swings upwards, and in the state, the gravity of the upper swing support plate 3 is transmitted to the lower swing support plate 1 through the gear and the transmission plate 62, so that the effect of saving labor is achieved.