Adjustable flat rack

Abstract

The present invention discloses an adjustable flat rack, comprising a rack body, a door frame and a column gap adjustment device; the rack body comprises a frame and a pull-out shelf; one side of the frame is open, and a plurality of first cross bars are arranged on both sides of the opening, and the pull-out shelf can be movably arranged in the frame; there are two door frames, which are hinged at the opening of the frame and can be matched and opened, and the door frame is provided with a second cross bar extending in the direction of the first cross bar on the frame when opened; guide rails are arranged on the first cross bar and the second cross bar, and rollers cooperating with the guide rails are arranged at the bottom of the pull-out shelf; a gap adjustment device is arranged between the door frame and the frame. The shelf of the present invention is convenient for taking and placing articles, and by adding a column gap adjustment device between the door frame and the rack body, the position of the door frame can be adjusted to prevent the guide rail from being offset, and the rebound controller between the door frame and the frame prevents the door frame from rebounding excessively after opening, and the rebound controller also has a press-lock failure function, which is used for the door frame to close the door.

Description

Technical Field

[0001] The invention belongs to the technical field of storage shelves and relates to an adjustable flat shelf. Background Art

[0002] Flat racks are a type of shelf used to store goods. They are widely used and can carry goods of various sizes and shapes. Due to the limitation of storage space, it is very important to improve the utilization rate of warehouse capacity. At the same time, the shelves should also have the requirements of convenient access to goods, easy inventory and management, and protection of goods quality. Therefore, pull-out shelves can meet these requirements, but pull-out shelves often require higher precision.

[0003] Shelves are usually assembled by welding, so there are geometric errors caused by thermal deformation during the production process. Due to the large size of the shelves, these small errors will also be magnified, causing the guide rails on the crossbars to deviate, resulting in problems such as the pull-out shelves getting stuck and disconnected. This not only affects the service life of the shelves, but in severe cases it can also cause the goods to fall and be damaged, and even endanger the safety of the staff. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to solve the problem of guide rail deviation caused by errors and to provide an adjustable flat rack.

[0005] Technical solution: An adjustable flat rack of the present invention includes a rack body, a door frame and a column gap adjustment device; wherein,

[0006] The frame body comprises a frame and a pull-out shelf; the frame is composed of a plurality of columns and a plurality of crisscrossing crossbeams and longitudinal beams; one side of the frame is open, and a plurality of first cross bars are provided on both sides of the opening of the frame, and the pull-out shelf can be movably arranged in the frame; there are two door frames, which are hinged at the opening of the frame and can be matched and opened, and the door frame is provided with a second cross bar extending in the same direction as the first cross bar on the frame when opened; guide rails are provided on the first cross bar and the second cross bar, and rollers cooperating with the guide rails are provided at the bottom end of the pull-out shelf;

[0007] A gap adjustment device is arranged between the door frame and the frame, and the gap adjustment device includes a first adjustment block and a second adjustment block, the first adjustment block and the second adjustment block are provided with mutually symmetrical inclined surfaces, the first adjustment block and the second adjustment block are spliced ​​with the inclined surfaces as contact surfaces and move away from or retracted in the extension direction of the inclined surfaces to change the thickness, and when the inclined surfaces of the first adjustment block and the second adjustment block are completely in contact, they are combined into a square column, and a plurality of opposite fixing grooves are arranged on the first adjustment block and the second adjustment block, and the first adjustment block and the second adjustment block are fixed by the fixing grooves and the adjusting screws after the positions are adjusted.

[0008] Furthermore, the gap adjustment device is installed on the frame or door frame, and a plurality of pre-stressed springs are arranged on a side of the gap adjustment device opposite to the installation surface, and the plurality of pre-stressed springs are arranged in a vertical direction.

[0009] Further, a rebound controller is arranged between the frame and the door frame, and the rebound controller comprises a striker connecting plate, a shell, a rotating shaft, a middle sleeve, a groove outer ring and a spring, the striker connecting plate is fixed to the door frame, the rotating shaft is rotatably arranged in the middle sleeve, the middle sleeve is arranged in the groove outer ring, and the spring is arranged between the rotating shaft and the shell;

[0010] The head end of the rotating shaft is provided with a limiting tooth, the end of the rotating shaft is provided with a protrusion with an inclined surface, the end of the middle sleeve is provided with a toothed groove, the end of the groove outer ring is provided with a serrated inclined sliding surface, the side wall of the groove outer ring is provided with a plurality of axial guide grooves, the opening intervals of the guide grooves are arranged between the inclined sliding surfaces, the middle sleeve and the groove outer ring are axially slidably matched, and the impact head connecting plate is provided with a buckle for hooking the limiting tooth. When the impact head connecting plate pushes the rotating shaft to move axially, the middle sleeve moves axially with the rotating shaft and the toothed groove drives the rotating shaft to rotate through the inclined surface of the protrusion. Each time the rotating shaft rotates, the rotating shaft switches between a first state and a second state. The first state is that the protrusion slides into the guide groove and the limiting tooth disengages from the buckle, and the second state is that the protrusion disengages from the guide groove and is stuck between adjacent serrated inclined sliding surfaces and the buckle hooks the limiting tooth.

[0011] Furthermore, the rebound controller is arranged at the top of the frame and the door frame.

[0012] Furthermore, a universal wheel is arranged at the bottom end of the door frame.

[0013] Furthermore, a fine-adjustment mechanism for adjusting the height of the universal wheel is provided at the connection between the universal wheel and the door frame.

[0014] Furthermore, the fine-tuning mechanism includes a base, a track, a sliding block, an adjustment plate and a trapezoidal screw, the track is arranged on the base, the track is set with an inclination angle, the trapezoidal screw controls the sliding block to slide on the track, the base is fixed under the door frame, and the universal wheel is arranged on the sliding block through a connecting plate.

[0015] Furthermore, the track has an inclination angle of 25 to 45° with respect to the horizontal direction.

[0016] Furthermore, the frame body further comprises a transmission shaft, the roller is connected to the transmission shaft via a spline, and the transmission shaft is driven to drive the roller to move on the guide rail, thereby driving the drawer shelf to move. The spline can achieve the effect of adjusting the position of the roller in the axial direction.

[0017] Furthermore, waist-shaped holes are provided at the connection between the guide rail and the first cross bar and the second cross bar for adjusting the position of each guide rail.

[0018] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. The invented flat shelf is provided with a door frame, which can be closed to prevent items from falling. After opening, the horizontal addition on the door frame can be used as an extended track to drag out the pull-out shelves in the shelf, so as to facilitate taking out items; 2. The present invention can adjust the position of the door frame by adding a column gap adjustment device to prevent the guide rail position from shifting, and the anti-collision spring on the column gap adjustment device can also play a buffering role in the door frame; 3. By arranging a rebound controller between the door frame and the frame, excessive rebound of the door frame after opening can be prevented. The rebound controller also has a press-lock failure function, which is used for closing the door frame; 4. The fine-tuning mechanism at the universal wheel can adjust the height of the wheel. In the case of an uneven bottom surface, the wheel can also be kept in contact with the ground by adjusting the fine-tuning mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a side structural schematic diagram of the present invention.

[0021] Figure 3 for Figure 1 A partial enlarged view of point A in the middle.

[0022] Figure 4 It is a structural schematic diagram of the column gap adjustment device of the present invention.

[0023] Figure 5 It is a structural schematic diagram of the rebound controller of the present invention.

[0024] Figure 6 It is a partial schematic diagram of the rebound controller C of the present invention.

[0025] Figure 7 for Figure 1 A partial enlarged view of point B in the middle.

[0026] Figure 8 It is a structural schematic diagram of the fine-tuning structure of the present invention.

[0027] Fig. 9 It is a schematic diagram of the connection structure between the roller and the transmission shaft. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0029] like Figure 1-3 As shown, the adjustable flat rack of this embodiment includes a frame body 1, a door frame 2 and a column gap adjustment device 3; the frame body 1 includes a frame 11 with three openings, and the door frame 2 is two symmetrical leaves, which are respectively hinged at the openings of the frame 11 and can be matched and opened. Universal wheels 6 are also provided under the door frame 2 to facilitate the opening and closing of the door frame 2.

[0030] The frame 11 is composed of a plurality of columns and a plurality of crisscross cross beams and longitudinal beams to form a three-sided open frame. A plurality of first cross bars 13 are evenly distributed in the vertical direction of the columns. Each layer of the first cross bars 13 constitutes a space for placing the pull-out shelf 12. The pull-out shelf 12 can be movably arranged in the frame 11. At the same time, the door frame 2 is provided with a second cross bar 21 extending in the direction of the first cross bar 13 on the frame 11. Guide rails are arranged on the first cross bar 13 and the second cross bar 21. When the door frame 2 is opened, the guide rails on the first cross bar 13 and the second cross bar 21 can be joined to form a long guide rail. In a specific embodiment, a waist-shaped hole 8 is arranged at the connection between the guide rail and the first cross bar 13 or the second cross bar 21 for adjusting the position of each guide rail. A roller 1201 is provided at the bottom end of the pull-out shelf 12. In a specific embodiment, a transmission shaft 1202 is provided on the pull-out shelf 12. The roller 1201 is transmission-connected to the transmission shaft 1202. The transmission shaft 1202 drives the roller 1201 to move on the guide rail, thereby driving the pull-out shelf 12 to move forward and backward. When it is necessary to take or place items, the pull-out shelf 12 can be moved out along the guide rails on the first cross bar 13 and the second cross bar 21, which is convenient for taking or placing items. When not in use, the pull-out shelf 12 is moved into the frame 11 along the guide rails, and the door frame 2 is closed, which can prevent items from falling and save storage space.

[0031] Combination Figure 4In a specific embodiment, a gap adjustment device 3 is provided between the door frame 2 and the frame 11. The gap adjustment device 3 can be installed at the opening of the frame 11 or on the door frame 2 to adjust the gap between the door frame 2 and the frame 11. By adjusting the gap, the guide rails on the first crossbar 13 and the second crossbar 21 are docked to prevent disjointment, which causes the pull-out shelf 12 to move unsmoothly. The gap adjustment device 3 includes a first adjustment block 31 and a second adjustment block 32. The first adjustment block 31 and the second adjustment block 32 are provided with mutually symmetrical inclined surfaces. The first adjustment block 31 and the second adjustment block 32 are spliced ​​with the inclined surfaces as contact surfaces and move away from or retract from each other in the extending direction of the inclined surfaces to adjust the thickness. When the inclined surfaces of the first adjustment block 31 and the second adjustment block 32 are completely in contact, they are combined into a square column. The first adjustment block 31 and the second adjustment block 32 are provided with a plurality of opposite fixing grooves 33. After the positions are adjusted, the first adjustment block 31 and the second adjustment block 32 are fixed by the fixing grooves 33 and the adjusting screws 34. In a specific practical process, when the door frame 2 is opened and the opening is too large, one of the unfixed adjustment blocks can be adjusted to move it in the direction of the inclined plane extension and separate it from the other adjustment block to a suitable position, and then fixed with an adjustment screw 34; when the door frame 2 cannot be opened to a sufficient opening, one of the unfixed adjustment blocks can be adjusted to move it in the direction of the inclined plane extension and close it to a suitable position relative to the other adjustment block, and then fixed with an adjustment screw 34. Through such adjustment, the second cross bar 21 on the door frame 2 can be aligned with the first cross bar 13 to prevent the guide rail from deviating. Furthermore, a plurality of pre-stress springs 35 are arranged on one side of the gap adjustment device 3 relative to the mounting surface, and the plurality of pre-stress springs 35 are arranged in the vertical direction to play a buffering role for the door frame 2.

[0032] like Figure 2 , 5 As shown in FIGS. 6 and 7 , a rebound controller 4 is provided between the frame 11 and the door frame 2 , and the rebound controller 4 is provided at the top of the frame 11 .

[0033] The function of the rebound controller 4 is to prevent the door frame 2 from rebounding. The rebound controller 4 includes a striker connecting plate 41, a rotating shaft 42, a middle sleeve 43, a groove outer ring 44, a spring 45 and a shell (not shown in the figure to show the internal components), wherein the striker connecting plate 41 is fixed to the door frame 2, the rotating shaft 42 is rotatably arranged in the middle sleeve 43, the middle sleeve 43 is arranged in the groove outer ring 44, and the spring 45 is arranged between the rotating shaft 42 and the shell.

[0034] The head end of the rotating shaft 42 is provided with a limiting tooth 4201, the end of the rotating shaft 42 is provided with a convex block 4202 with an inclined surface, the end of the middle sleeve 43 is provided with a toothed groove 4301, the end of the groove outer ring 44 is provided with a serrated inclined sliding surface 4402, the side wall of the groove outer ring 44 is provided with a plurality of axial guide grooves 4401, the opening of the guide groove 4401 is arranged at intervals with the inclined sliding surface 4402, the middle sleeve 43 and the groove outer ring 44 are axially slidably matched, the impact head connecting plate 41 is provided with a buckle 4101 for hooking the limiting tooth 4201, and the impact head connecting plate 41 is provided with a buckle 4101 for hooking the limiting tooth 4201. When the connecting plate 41 pushes the rotating shaft 42 to move axially, the middle sleeve 43 moves axially with the rotating shaft 42 and the toothed groove 4301 drives the rotating shaft 42 to rotate through the inclined surface of the protrusion 4202. Each time the rotating shaft 42 rotates, the rotating shaft 42 switches between the first state and the second state. The first state is that the protrusion 4202 slides into the guide groove 4401 and the limiting tooth 4201 disengages from the buckle 4101. The second state is that the protrusion 4202 disengages from the guide groove 4401 and is stuck between adjacent serrated inclined sliding surfaces 4402 and the buckle 4101 hooks the limiting tooth 4201.

[0035] The principle of the rotation shaft 42 rotating and switching between the first state and the second state is shown in Figure 6 The tooth tip of the tooth groove 4301 on the middle sleeve 43 corresponds to the guide groove 4401 on the axis a, and the tooth root of the tooth groove 4301 on the middle sleeve 43 corresponds to the sawtooth inclined sliding surface 4402 on the axis b. Under the elastic force of the spring 45, the protrusion 4202 slides on the tooth groove 4301 and the sawtooth inclined sliding surface 4402, so that the protrusion 4202 can slide into the guide groove 4401 under the push and break away from the guide groove 4401 after the next push and get stuck between the adjacent sawtooth inclined sliding surfaces 4402. With such a structural design, when the door frame 2 hits the rebound controller 4 when it is opened, the door frame 2 can be locked to prevent the spring from rebounding the door frame 2. The working process of the rebound controller 4 is described below in combination with one of the schemes, as follows:

[0036] 1. When the door frame 2 is opened, the rotating shaft 42 is pressed by the striker connecting plate 41 on the door frame 2, and the rotating shaft 42 and the middle sleeve 43 are pressed downward together;

[0037] 2. When the rotating shaft 42 and the middle sleeve 43 are pressed to the lowest point, the pressing force overcomes the elastic force of the spring 45 so that the protrusion 4202 and the toothed groove 4301 on the middle sleeve 43 come into contact with each other and have a mutual force, and the protrusion 4202 is pushed away from the guide groove 4401 by the sharp point of the toothed groove 4301;

[0038] 3. When the pressing force is removed, the rotating shaft 42 is pushed back under the elastic force of the spring 45, and the inclined surface on the protrusion 4202 slides in the toothed groove 4301 until the protrusion 4202 slides to the bottom of the toothed groove 4301. At this time, the protrusion 4202 is driven by the toothed groove 4301 to rotate to the sawtoothed inclined sliding surface 4402 on the outer ring 44 of the groove, and continues to move along the sawtoothed inclined sliding surface 4402 under the push of the elastic force of the spring 45 until it is blocked by the oblique tooth surface of the sawtoothed inclined sliding surface 4402; at this time, the rotating shaft 42 is in the second state, and the buckle 4101 hooks the limit tooth 4201, and the door frame 2 is locked and will not rebound;

[0039] 4. When the door frame 2 needs to be released, it is only necessary to push the door frame 2 to drive the impact head connecting plate 41 thereon to press the rotating shaft 42 again, so that the rotating shaft 42 rotates, and the protrusion 4202 slides into the guide groove 4401. At this time, the rotating shaft 42 is in the first state, the limiting tooth 4201 is disengaged from the buckle 4101, and the locking state of the door frame 2 is released.

[0040] like Figure 7-8 As shown, in a specific embodiment, the universal wheel 6 is connected to the door frame 2 through a fine-tuning mechanism 5, and the fine-tuning mechanism 5 can adjust the height of the universal wheel 5. In the case of an uneven bottom surface, the wheel can be kept in contact with the ground by adjusting the fine-tuning mechanism 5. The fine-tuning mechanism 5 includes a base 51, a track 52, a sliding block 53, an adjustment plate 54, and a trapezoidal screw 55. The track 52 is arranged on the base 51, and the track 52 is arranged with an inclination angle of 25 to 45° with the horizontal direction, preferably 30°. The trapezoidal screw 55 controls the sliding block 53 to slide on the track 52. The base 51 is fixed below the door frame 2, and the universal wheel 6 is arranged on the sliding block 53 through a connecting plate. The method of use is that when the universal wheel 6 is uneven with the ground, the adjustment head outside the adjustment plate 54 is twisted by a wrench, so that the trapezoidal screw 55 adjusts the sliding block 53 to slide on the track 52, and the effect of adjusting the height of the universal wheel 6 is achieved by adjusting the angle between the track 52 and the horizontal plane.

[0041] like Fig. 9 As shown, in a specific embodiment, due to the large overall specifications of the shelf, certain errors are inevitable during welding due to thermal deformation and the like, resulting in the inability to align the guide rails on the first cross bar 13 or the second cross bar 21 with the roller 1201. Therefore, the roller 1201 is connected to the drive shaft 1202 via the spline 7, and the roller 1201 can be axially adjusted via the spline 7, so that the position of the roller 1201 can be adjusted to prevent the roller 1201 from leaving the guide rail.

Claims

1. An adjustable flat rack, characterized in that: It includes a frame, a door frame and a column gap adjustment device; wherein, The frame body comprises a frame and a pull-out shelf; the frame is composed of a plurality of columns and a plurality of crisscrossing crossbeams and longitudinal beams; one side of the frame is open, and a plurality of first cross bars are provided on both sides of the opening of the frame, and the pull-out shelf can be movably arranged in the frame; there are two door frames, which are hinged at the opening of the frame and can be matched and opened, and the door frame is provided with a second cross bar extending in the same direction as the first cross bar on the frame when opened; guide rails are provided on the first cross bar and the second cross bar, and rollers cooperating with the guide rails are provided at the bottom end of the pull-out shelf; A gap adjustment device is provided between the door frame and the frame, for adjusting the gap between the door frame and the frame. By adjusting the gap, the guide rails on the first crossbar and the second crossbar are butted against each other to prevent disjointness and cause the pull-out shelf to move unsmoothly. The gap adjustment device comprises a first adjustment block and a second adjustment block, wherein the first adjustment block and the second adjustment block are provided with mutually symmetrical inclined surfaces, the first adjustment block and the second adjustment block are spliced ​​with the inclined surfaces as contact surfaces and move away from or retract from each other in the extending direction of the inclined surfaces so as to change the thickness, and the first adjustment block and the second adjustment block are provided with a plurality of mutually penetrating fixing grooves, and the first adjustment block and the second adjustment block are fixed by the fixing grooves and the adjusting screws after the positions are adjusted; A universal wheel is arranged at the bottom end of the door frame, and a fine-adjustment mechanism for adjusting the height of the universal wheel is arranged at the connection between the universal wheel and the door frame.

2. The adjustable flat rack according to claim 1, characterized in that: The gap adjustment device is installed on the frame or door frame. A plurality of pre-stressed springs are arranged on one side of the gap adjustment device opposite to the installation surface. The plurality of pre-stressed springs are arranged in a vertical direction.

3. The adjustable flat rack according to claim 1 or 2, characterized in that: A rebound controller is arranged between the frame and the door frame, and the rebound controller comprises a striker connecting plate, a shell, a rotating shaft, a middle sleeve, a groove outer ring and a spring, the striker connecting plate is fixed to the door frame, the rotating shaft is rotatably arranged in the middle sleeve, the middle sleeve is arranged in the groove outer ring, and the spring is arranged between the rotating shaft and the shell; The head end of the rotating shaft is provided with a limiting tooth, the end of the rotating shaft is provided with a protrusion with an inclined surface, the end of the middle sleeve is provided with a toothed groove, the end of the groove outer ring is provided with a serrated inclined sliding surface, the side wall of the groove outer ring is provided with a plurality of axial guide grooves, the opening intervals of the guide grooves are arranged between the inclined sliding surfaces, the middle sleeve and the groove outer ring are axially slidably matched, and the impact head connecting plate is provided with a buckle for hooking the limiting tooth. When the impact head connecting plate pushes the rotating shaft to move axially, the middle sleeve moves axially with the rotating shaft and the toothed groove drives the rotating shaft to rotate through the inclined surface of the protrusion. Each time the rotating shaft rotates, the rotating shaft switches between a first state and a second state. The first state is that the protrusion slides into the guide groove and the limiting tooth disengages from the buckle, and the second state is that the protrusion disengages from the guide groove and is stuck between adjacent serrated inclined sliding surfaces and the buckle hooks the limiting tooth.

4. The adjustable flat rack according to claim 3, characterized in that: The rebound controller is arranged on the top of the frame and the door frame.

5. The adjustable flat rack according to claim 1, characterized in that: The fine-tuning mechanism includes a base, a track, a sliding block, an adjustment plate and a trapezoidal screw. The track is arranged on the base, the track is provided with an inclination angle, the trapezoidal screw controls the sliding block to slide on the track, the base is fixed under the door frame, and the universal wheel is arranged on the sliding block through a connecting plate.

6. The adjustable flat rack according to claim 5, characterized in that: The track is inclined at an angle of 25 to 45° to the horizontal direction.

7. The adjustable flat rack according to claim 1, characterized in that: The frame body also includes a transmission shaft, and the roller is connected to the transmission shaft via a spline. The transmission shaft is driven to drive the roller to move on the guide rail, thereby driving the drawer shelf to move.

8. The adjustable flat rack according to claim 1, characterized in that: The connection between the guide rail and the first cross bar and the second cross bar is provided with a waist-shaped hole for adjusting the position of each guide rail.

Images