CN215248191U

CN215248191U - Automatic board separator

Info

Publication number: CN215248191U
Application number: CN202121350096.6U
Authority: CN
Inventors: 吴家实; 陈飚; 傅鑫源; 傅炳煌
Original assignee: Quangong Machinery Co Ltd
Current assignee: Quangong Machinery Co Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-12-21
Anticipated expiration: 2031-06-17

Abstract

The utility model relates to an automatic board separator, include the main frame and establish two cranes on the main frame, but two cranes vertical direction slidable mounting are in the left and right sides of main frame respectively, main frame upper portion is equipped with the lift actuating mechanism who drives two cranes and go up and down in step, the bottom of every crane all is equipped with the layer board support frame, the location clamping jaw is installed in the left side of main frame, the right side of main frame is equipped with and holds the clamping jaw tightly, the location clamping jaw sets up with holding the clamping jaw tightly relatively, the location clamping jaw is installed on the main frame with holding the connecting rod that the clamping jaw was gone up and down through vertical setting respectively, the location hydro-cylinder of vertical setting and the horizontal support connecting rod that sets up are installed in the left side of main frame, the location clamping jaw is connected with the support connecting rod, the swing of location hydro-cylinder drive support connecting rod, the right side of main frame is installed and is held the hydro-cylinder of transversely setting tightly, hold the piston rod of hydro-cylinder with hold the clamping jaw tightly articulated connection. The utility model discloses an automatic board separator simple structure, fault point are low, with low costs and deposit the board volume and promote greatly.

Description

Automatic board separator

Technical Field

The utility model relates to a building block former technical field especially relates to an automatic board separator.

Background

The production line of the full-automatic block forming machine has the main function that mixed materials are put into a mould, and bricks which are consistent with the shape of the mould are formed by vibrating a supporting plate, wherein the supporting plate is one of indispensable matching parts of the production line of the full-automatic block forming machine.

Common full-automatic block forming machine production line adopts automatic trigger of going up to send into the production line with the layer board usually, automatic trigger of going up need promote the layer board buttress to required height, again with the push pedal propelling movement of the top in the board storehouse of trigger, therefore, automatic trigger of going up need include the board buttress rack at least, the board buttress conveying chain, board buttress hoisting device, layer board centering device and layer board pusher, and the trigger of sending on the production line still need be furnished with the board storehouse, the board storehouse can only save a small amount of layer boards (generally can only deposit 3 to 5 layer boards, too many overweight meeting of layer board leads to sending the board machine to push away the transfixion), whole upper plate device structure is complicated, and is with high costs, the fault point is many.

SUMMERY OF THE UTILITY MODEL

For overcoming the technical defect that prior art exists, the utility model provides an automatic board separator, its simple structure, fault point are low, with low costs and deposit the board volume and promote greatly.

The utility model discloses a technical solution be: an automatic plate separator comprises a main frame and two lifting frames arranged on the main frame, wherein the two lifting frames are respectively arranged on the left side and the right side of the main frame in a sliding manner in the vertical direction, a lifting driving mechanism for driving the two lifting frames to synchronously lift is arranged at the upper part of the main frame, a supporting plate supporting frame is arranged at the bottom of each lifting frame, a positioning clamping jaw is arranged at the left side of the main frame, a holding clamping jaw is arranged at the right side of the main frame, the positioning clamping jaw and the holding clamping jaw are oppositely arranged, the positioning clamping jaw and the holding clamping jaw are respectively arranged on the main frame through a vertically arranged connecting rod, a first end of the connecting rod is hinged on the frame, a second end of the connecting rod is hinged on the positioning clamping jaw or the holding clamping jaw, a vertically arranged positioning oil cylinder and a transversely arranged supporting connecting rod are arranged at the left side of the main frame, the supporting connecting rod comprises a first connecting rod and a second connecting rod, the left end of the first connecting rod is hinged on the main frame, the right end of the first connecting rod is hinged with the left end of the second connecting rod through a hinge pin shaft, the right end of the second connecting rod is hinged to the positioning clamping jaw, a cylinder body of the positioning oil cylinder is hinged to the main frame, a piston rod of the positioning oil cylinder is connected with the hinge pin shaft, a transversely arranged holding oil cylinder is installed on the right side of the main frame, the cylinder body of the holding oil cylinder is hinged to the main frame, and a piston rod of the holding oil cylinder is hinged to the holding clamping jaw.

Preferably, the lift actuating mechanism includes lift drive cylinder, lift drive swing arm, lift drive shaft, lift promotion swing arm and lifting connecting rod, the lift drive shaft passes through the pedestal bearing and installs at the main frame top along left right direction, lift drive cylinder's cylinder body articulates at the main frame top, the one end of lift drive swing arm is fixed in the lift drive shaft, and the other end of lift drive swing arm is connected with lift drive cylinder's piston rod is articulated, and a lift promotion swing arm is installed respectively at the both ends of lift drive shaft, and the one end rigid coupling of lift promotion swing arm is connected with the crane through a lifting connecting rod at its other end on the lift drive shaft.

Preferably, a pair of lifting guide rails is respectively installed on the left side and the right side of the main frame, and the two lifting frames are respectively in sliding fit with the lifting guide rails at the corresponding positions.

Preferably, guide wheels are installed at the front end and the rear end of each lifting frame, each guide wheel comprises a large guide wheel and a small guide wheel, a rotating shaft of each large guide wheel extends in the front-rear direction, a rotating shaft of each small guide wheel extends in the left-right direction, and the large guide wheel and the small guide wheels are matched in the lifting guide rail in a rolling mode.

Preferably, little guide pulley passes through adjusting device and installs on the crane, adjusting device includes mounting panel, locating plate, activity even board, locking screw, adjusting screw and adjusting nut, the mounting panel is fixed on the crane, and the little guide pulley of the first end installation of activity even board, the second end of activity even board is seted up along the adjusting through-hole of fore-and-aft direction extension, the locking screw is worn to establish adjusting through-hole and screw thread and is worn to establish on the mounting panel, the locating plate rigid coupling is on the mounting panel, and adjusting screw wears to establish on the locating plate and the terminal butt of adjusting screw is at the second end of activity even board, adjusting nut thread bush is established on adjusting screw and with the locating plate rigid coupling.

Preferably, the left side of the main frame is provided with two positioning clamping jaws in an up-and-down symmetrical manner, the right side of the main frame is provided with two holding clamping jaws in an up-and-down symmetrical manner, and the two positioning clamping jaws and the two holding clamping jaws are arranged just opposite to each other.

Preferably, each positioning clamping jaw and each holding clamping jaw are respectively arranged on the main frame through two connecting rods.

Preferably, a guide folding plate is respectively installed on the left side and the right side inside the main frame, an inclined plate is respectively arranged at the front end of each guide folding plate, the two inclined plates extend towards the outside of the main frame to form a horn-shaped feed inlet, and a positioning clamping jaw or a strip-shaped through hole for allowing the clamping jaw to pass through is formed in each guide folding plate.

Preferably, the rear side of the main frame is provided with two vertical rods, and each vertical rod is fixedly connected with two L-shaped baffles.

The beneficial effects of the utility model reside in that: the utility model discloses an automatic board separator's simple structure, it is with low costs, it is big to deposit the board volume, both can carry out the storage of layer board as half storehouse, can carry out the piece by piece again and send the board, the utility model discloses a location clamping jaw with hold tight clamping jaw cooperation and press from both sides tight board buttress, the layer board support frame both can be used for bearing board buttress, what be responsible for the layer board again transfers by the piece, the board buttress sends into behind the main frame, location clamping jaw and holding tight clamping jaw cooperation realize the clamp tight to the board buttress, location clamping jaw and holding tight clamping jaw press from both sides tight reciprocal second piece layer board, reciprocal first piece layer board is placed on the layer board support frame, the crane drives the layer board and moves down, realizes and the separation of board buttress to place the layer board on sending the board machine, the rethread send the board machine to send the layer board into the production line, whole equipment structure is simple, fault point greatly reduced.

Drawings

Fig. 1 is a schematic structural view of the automatic plate separator of the present invention.

Fig. 2 is a first perspective view of the automatic plate separator of the present invention.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Fig. 4 is a partially enlarged view of fig. 2 at B.

Fig. 5 is a second perspective view of the automatic plate separator of the present invention.

Fig. 6 is a partially enlarged view of C in fig. 5.

Figure 7 is the structure schematic diagram of the lifting frame of the utility model.

Fig. 8 is an assembly diagram of the small guide wheel of the present invention.

Description of reference numerals: 1. a main frame; 101. a lifting guide rail; 102. a guide folded plate; 1021. a strip-shaped through hole; 103. a lifting drive oil cylinder; 104. a lifting drive shaft; 105. lifting and driving the swing arm; 106. lifting and lifting the swing arm; 107. a lifting connecting rod; 108. a pedestal bearing; 109. a vertical rod; 110. a baffle plate; 2. a lifting frame; 201. a large guide wheel; 202. a small guide wheel; 203. mounting a plate; 204. positioning a plate; 205. a movable connecting plate; 206. locking screws; 207. adjusting screws; 208. adjusting the nut; 209. a pallet support frame; 3. positioning the clamping jaw; 301. positioning the oil cylinder; 302. a support link; 3021. a first link; 3022. a second link; 3023. hinging a pin shaft; 4. tightly holding the clamping jaw; 401. tightly holding the oil cylinder; 5. a connecting rod; 601. a screw; 602. a mounting member; 603. a return spring; 604. and a limiting member.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1 to 8, the embodiment provides an automatic plate separator, which includes a main frame 1 and two cranes 2 arranged on the main frame 1, wherein the two cranes 2 are respectively slidably mounted on the left and right sides of the main frame 1 in the vertical direction, the upper portion of the main frame 1 is provided with a lifting driving mechanism for driving the two cranes 2 to synchronously lift, the bottom of each crane 2 is provided with a pallet support frame 209, the left side of the main frame 1 is provided with a positioning clamping jaw 3, the right side of the main frame 1 is provided with a clasping clamping jaw 4, the positioning clamping jaw 3 and the clasping clamping jaw 4 are oppositely arranged, the positioning clamping jaw 3 and the clasping clamping jaw 4 are respectively mounted on the main frame 1 through a vertically arranged connecting rod 5, the first end of the connecting rod 5 is hinged on the frame, the second end of the connecting rod 5 is hinged on the positioning clamping jaw 3 or the clasping clamping jaw 4, the left side of the main frame 1 is provided with a vertically arranged positioning oil cylinder 301 and a horizontally arranged support connecting rod 302, the support connecting rod 302 comprises a first connecting rod 3021 and a second connecting rod 3022, the left end of the first connecting rod 3021 is hinged to the main frame 1, the right end of the first connecting rod 3021 is hinged to the left end of the second connecting rod 3022 through a hinge pin 3023, the right end of the second connecting rod 3022 is hinged to the positioning jaw 3, the cylinder body of the positioning cylinder 301 is hinged to the main frame 1, the piston rod of the positioning cylinder 301 is connected to the hinge pin 3023, the right side of the main frame 1 is provided with a transversely arranged holding cylinder 401, the cylinder body of the holding cylinder 401 is hinged to the main frame 1, the piston rod of the holding cylinder 401 is hinged to the holding jaw 4, and the automatic plate separator of the embodiment is simple in structure and has the functions of storing and placing plates.

The piston rod of positioning cylinder 301 stretches out, the clamping face that drives positioning clamping jaw 3 through supporting connecting rod 302 is rotatory to the direction towards the plate pile, two piston rods of embracing tight hydro-cylinder 401 stretch out afterwards, the clamping face that embraces clamping jaw 4 through connecting rod 5 drive is rotatory to laminating with the plate pile, act on down in the time of positioning clamping jaw 3 with embracing clamping jaw 4, the realization is held tightly to the plate pile, positioning cylinder 301 will support connecting rod 302 swing to required position, the power of embracing the layer board tightly is born by supporting connecting rod 302, the power of vertical direction is born by connecting rod 5 that corresponds, so can prolong positioning cylinder 301's life-span.

In this embodiment, the lift driving mechanism includes a lift driving cylinder 103, a lift driving swing arm 105, a lift driving shaft 104, a lift lifting swing arm 106 and a lift link 107, the elevation driving shaft 104 is installed on the top of the main frame 1 in the left and right direction by means of a pedestal bearing 108, the cylinder body of the lifting driving oil cylinder 103 is hinged on the top of the main frame 1, one end of the lifting driving swing arm 105 is fixed on the lifting driving shaft 104, the other end of the lifting driving swing arm 105 is hinged with the piston rod of the lifting driving oil cylinder 103, two ends of the lifting driving shaft 104 are respectively provided with a lifting swing arm 106, one end of the lifting swing arm 106 is fixedly connected on the lifting driving shaft 104, the other end is connected with the lifting frame 2 through a lifting connecting rod 107, the lifting driving oil cylinder 103 operates, the lifting frame 2 can be driven to ascend or descend, so that the supporting plate supporting frame 209 at the lower end of the lifting frame 2 is driven to ascend or descend. Preferably, a pair of lifting guide rails 101 are respectively installed on the left side and the right side of the main frame 1, the two lifting frames 2 are respectively in sliding fit with the lifting guide rails 101 at respective corresponding positions, guide wheels are installed at the front end and the rear end of each lifting frame 2, each guide wheel comprises a large guide wheel 201 and a small guide wheel 202, a rotating shaft of the large guide wheel 201 extends in the front-rear direction, a rotating shaft of the small guide wheel 202 extends in the left-right direction, and the large guide wheel 201 and the small guide wheel 202 are in rolling fit in the lifting guide rails 101.

In this embodiment, the small guide wheel 202 is mounted on the crane 2 through an adjusting device, the adjusting device includes a mounting plate 203, a positioning plate 204, a movable connecting plate 205, a locking screw 206, an adjusting screw 207 and an adjusting nut 208, the mounting plate 203 is fixed on the crane 2, the small guide wheel 202 is mounted at a first end of the movable connecting plate 205, an adjusting through hole extending in the front-back direction is formed at a second end of the movable connecting plate 205, the locking screw 206 is inserted through the adjusting through hole and threadedly inserted on the mounting plate 203, the positioning plate 204 is fixedly connected to the mounting plate 203, the adjusting screw 207 is inserted on the positioning plate 204, a tail end of the adjusting screw 207 abuts against the second end of the movable connecting plate 205, the adjusting nut 208 is threadedly inserted on the adjusting screw 207 and fixedly connected to the positioning plate 204, and a gap between the small guide wheel 202 and the lifting guide rail 101 can be changed by adjusting an extension amount of the adjusting screw 207, so can reduce and rock, guarantee that crane 2 steadily goes up and down.

In this embodiment, the positioning clamping jaw 3 and the clasping clamping jaw 4 are both provided with a resetting device, the resetting device includes a screw 601, a mounting member 602 and a resetting spring 603, the mounting member 602 is fixedly connected to the positioning clamping jaw 3 or the clasping clamping jaw 4, the screw 601 is slidably inserted into the mounting member 602 in the vertical direction, two ends of the screw 601 are respectively provided with a limiting member 604, one of the limiting members 604 is fixedly connected to the connecting rod 5, a resetting spring 603 is respectively sleeved on the rod body of the screw 601 between each limiting member 604 and the mounting member 602, when the positioning oil cylinder 301 drives the supporting connecting rod 302 to swing, a small angle swing exists between the positioning clamping jaw 3 and the corresponding connecting rod 5, the resetting spring 603 is compressed, the connecting rod 5 can assist the resetting of the positioning clamping jaw 3 through the resetting device after swinging in place, when resetting, the resetting spring 603 restores the shape and assists the resetting of the positioning clamping jaw 3, when the positioning oil cylinder 301 drives the positioning clamping jaw 3 to be close to the supporting plate, the reset spring 603 at the upper end of the screw rod 601 is compressed and deformed, the positioning clamping jaw 3 is reset, the positioning oil cylinder 301 drives the positioning clamping jaw 3 to be far away from the supporting plate, the clamping jaw reset device can assist the positioning clamping jaw 3 to rotate relative to the connecting rod 5, the positioning clamping jaw 3 is prevented from being blocked, the reset spring 603 at the lower part of the screw rod 601 plays a role in buffering, and the reset device on the clamping jaw 4 is also used for assisting the clamping jaw 4 to reset.

In this embodiment, two location clamping jaws 3 are installed to main frame 1's left side longitudinal symmetry, and main frame 1's right side longitudinal symmetry installation is equipped with two and embraces clamping jaw 4 tightly, and two location clamping jaws 3 and two are embraced clamping jaw 4 and just to setting up, and every location clamping jaw 3 and every are embraced clamping jaw 4 and are installed on main frame 1 through two connecting rods 5 respectively, and two pairs of location clamping jaws 3 hold tightly the board buttress with embracing clamping jaw 4.

In this embodiment, a guide folding plate 102 is installed respectively to the inside left and right sides of main frame 1, and the front end of every guide folding plate 102 is equipped with an swash plate respectively, and two swash plates extend to main frame 1 outside and constitute a loudspeaker form feed inlet, all set up a location clamping jaw 3 that supplies main frame 1 upper portion or hold the bar through-hole 1021 that clamping jaw 4 passed through on every guide folding plate 102, and guide folding plate 102 guide plate buttress gets into main frame 1, and the entering in-process guide folding plate 102 carries out centering adjustment to the plate buttress, preferably, the rear side of main frame 1 is equipped with two montants 109, and the rigid coupling has two L shape baffles 110 on every montant 109, and the rear end contact of plate buttress is kept off neatly by baffle 110.

When the automatic plate dividing machine of the embodiment works, a plate stack is inserted into a main frame 1 through a forklift, the plate stack is centered and adjusted through a guide folded plate 102 in the entering process of the plate stack, then the plate stack is placed on a supporting plate supporting frame 209, piston rods of two positioning oil cylinders 301 extend out, a supporting connecting rod 302 drives a clamping surface of a positioning clamping jaw 3 to rotate to the direction facing the plate stack, then piston rods of two holding oil cylinders 401 extend out, a connecting rod 5 drives a clamping surface of a holding clamping jaw 4 to rotate to be attached to the plate stack, under the simultaneous action of the positioning clamping jaw 3 and the holding clamping jaw 4, the upper part and the lower part of the plate stack are held tightly, the positioning clamping jaw 3 and the holding clamping jaw 4 which are positioned at the lower part of the main frame 1 only clamp the plate stack from a penultimate supporting plate, after the holding tightly, a piston rod of a lifting driving oil cylinder 103 is retracted, a lifting driving swing arm 105 pulls a lifting driving shaft 104 to rotate, then the lifting frame 2 is driven to move downwards by the lifting connecting rods 107 at the two ends of the lifting driving shaft 104, a supporting plate at the bottommost layer descends along with the supporting plate supporting frame 209 to realize the separation from the plate stack, finally the supporting plate supporting frame 209 places the supporting plate on a plate conveying machine, the plate conveying machine conveys the supporting plate into a production line, the supporting plate supporting frame 209 rises and abuts against a supporting plate at the bottommost layer of the plate stack, the piston rod of the positioning oil cylinder 301 and the piston cylinder of the enclasping oil cylinder 401 are reset, then the supporting plate supporting frame 209 drives the plate stack to descend by the height of the thickness of the supporting plate, the positioning clamping jaws 3 and the clamping jaws 4 clamp the plate stack again, the supporting plate supporting frame 209 descends to place the supporting plate on a plate conveying machine, the plate conveying machine conveys the supporting plate into a production line, the steps are repeated in a circulating way, the supporting plates are sent into the production line block by block, and meanwhile, the whole automatic plate dividing machine also achieves the function of supporting plate storage, so that the cost is reduced, and the plate storage amount is large.

Having shown and described the basic principles and essential features of the invention and its advantages, it will be understood by those skilled in the art that the present invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but is susceptible to various changes and modifications without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. Automatic board separator, its characterized in that: the lifting device comprises a main frame and two lifting frames arranged on the main frame, wherein the two lifting frames are respectively arranged at the left side and the right side of the main frame in a vertical direction in a sliding manner, the upper part of the main frame is provided with a lifting driving mechanism for driving the two lifting frames to synchronously lift, the bottom of each lifting frame is provided with a supporting plate supporting frame, the left side of the main frame is provided with a positioning clamping jaw, the right side of the main frame is provided with a holding clamping jaw, the positioning clamping jaw and the holding clamping jaw are oppositely arranged, the positioning clamping jaw and the holding clamping jaw are respectively arranged on the main frame through a vertically arranged connecting rod, the first end of the connecting rod is hinged on the frame, the second end of the connecting rod is hinged on the positioning clamping jaw or the holding clamping jaw, the left side of the main frame is provided with a vertically arranged positioning oil cylinder and a transversely arranged supporting connecting rod, the supporting connecting rod comprises a first connecting rod and a second connecting rod, the left end of the first connecting rod is hinged on the main frame, the right end of the first connecting rod is hinged with the left end of the second connecting rod through a hinge pin shaft, the right end of the second connecting rod is hinged to the positioning clamping jaw, a cylinder body of the positioning oil cylinder is hinged to the main frame, a piston rod of the positioning oil cylinder is connected with the hinge pin shaft, a transversely arranged holding oil cylinder is installed on the right side of the main frame, the cylinder body of the holding oil cylinder is hinged to the main frame, and a piston rod of the holding oil cylinder is hinged to the holding clamping jaw.

2. The automatic board separator according to claim 1, characterized in that: the lifting driving mechanism comprises a lifting driving oil cylinder, a lifting driving swing arm, a lifting driving shaft, a lifting swing arm and a lifting connecting rod, the lifting driving shaft is installed at the top of the main frame through a bearing with a seat along the left-right direction, a cylinder body of the lifting driving oil cylinder is hinged to the top of the main frame, one end of the lifting driving swing arm is fixed to the lifting driving shaft, the other end of the lifting driving swing arm is hinged to a piston rod of the lifting driving oil cylinder, the lifting swing arm is installed at two ends of the lifting driving shaft respectively, and one end of the lifting swing arm is fixedly connected to the lifting driving shaft while the other end of the lifting swing arm is connected to the lifting frame through the lifting connecting rod.

3. The automatic board separator according to claim 1, characterized in that: a pair of lifting guide rails is respectively installed on the left side and the right side of the main frame, and the two lifting frames are respectively in sliding fit with the lifting guide rails at the corresponding positions.

4. The automatic board separator according to claim 3, characterized in that: guide wheels are installed at the front end and the rear end of each lifting frame, each guide wheel comprises a large guide wheel and a small guide wheel, the rotating shaft of the large guide wheel extends in the front-rear direction, the rotating shaft of the small guide wheel extends in the left-right direction, and the large guide wheel and the small guide wheel are matched in the lifting guide rail in a rolling mode.

5. The automatic board separator according to claim 4, characterized in that: the utility model discloses a quick-witted, including the crane, the crane is installed on the crane, little guide pulley passes through adjusting device, adjusting device includes mounting panel, locating plate, activity even board, locking screw, adjusting screw and adjusting nut, the mounting panel is fixed on the crane, and the activity is even the little guide pulley of first end installation of board, and the second end of board is even offered along the fore-and-aft direction extension to the activity, the adjusting through-hole is worn to establish by locking screw and the screw thread is worn to establish on the mounting panel, the locating plate rigid coupling is on the mounting panel, and adjusting screw wears to establish on the locating plate and the terminal butt of adjusting screw is at the second end of activity even board, adjusting nut thread bush is established on adjusting screw and with the locating plate rigid coupling.

6. The automatic board separator according to claim 1, characterized in that: two positioning clamping jaws are symmetrically arranged on the left side of the main frame in an up-and-down mode, two clamping jaws are symmetrically arranged on the right side of the main frame in an up-and-down mode, and the two positioning clamping jaws and the two clamping jaws are arranged right opposite to each other.

7. The automatic board separator according to claim 6, characterized in that: each positioning clamping jaw and each holding clamping jaw are respectively arranged on the main frame through two connecting rods.

8. The automatic board separator according to claim 6, characterized in that: the utility model discloses a fixing device for main frame, including main frame, two blocks of guide folded plates, two blocks of inclined plates, the main frame is inside to be installed a direction folded plate respectively in the left and right sides, and the front end of every guide folded plate is equipped with an swash plate respectively, and two swash plates extend to the main frame outside and constitute a loudspeaker form feed inlet, all set up a location clamping jaw that supplies main frame upper portion or hold the bar through-hole that the clamping jaw passes through tightly on every guide folded plate.

9. The automatic board separator according to claim 1, characterized in that: two vertical rods are arranged on the rear side of the main frame, and two L-shaped baffles are fixedly connected to each vertical rod.