CN109954531A

CN109954531A - A kind of experimental bench

Info

Publication number: CN109954531A
Application number: CN201910119379.0A
Authority: CN
Inventors: 刘鉴辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-02-15
Filing date: 2019-02-15
Publication date: 2019-07-02
Anticipated expiration: 2039-02-15
Also published as: CN109954531B

Abstract

The present invention relates to experiment equipment technology fields, more particularly to a kind of experimental bench, including cabinet body, the first accommodating cavity is provided in cabinet body, step-like first partition is equipped in first accommodating cavity, the lower one end of the step of first partition is arranged close to the open side of the first accommodating cavity, and the grasping mechanism for grabbing article is additionally provided in cabinet body；And, cabinet door, cabinet door includes main door plate, and it is several with the vertically-mounted secondary door-plate to surround the second accommodating cavity for accommodating article of main door plate, second partition, the retaining piece for article to be limited on the predetermined position of second partition are provided in the second accommodating cavity and by cooperating around glassware with main door plate glassware to be further secured to the locating part on second partition.The present invention, which has the advantages that conveniently to take, the article in experimental bench at different depth and is avoided that glassware is accidentally touched down and is crushed.

Description

A kind of experimental bench

Technical field

The present invention relates to experiment equipment technology fields, and in particular to a kind of experimental bench.

Background technique

Experimental bench is that the laboratory of the units such as hospital, school, chemical plant, scientific research institutions carries out dress commonly used by experiment detection It sets.

Existing experimental bench includes sales counter panel and the locker that is arranged under sales counter panel, on the one hand locker is used In support sales counter panel, on the other hand for storing experimental apparatus.And in general, working as the article in needs remove to take locker most When, it is necessary to it will first be placed on the outmost article of locker and move away and take again, it is more inconvenient, additionally, due to experimental bench memory The glassware of storage is all simply placed, and is not fixed, and is easy accidentally to be touched down and broken when taking thing.

Summary of the invention

Therefore, the technical problem to be solved in the present invention is that overcoming in the prior art in needing to remove to take locker most When the article at place, it is necessary to it will first be placed on the outmost article of locker and move away and take again, more inconvenient and storage glass The unfixed defect for being easy to be broken of glass vessel, to provide a kind of inboard article of conveniently taking, and glassware places jail Solid experimental bench.

To solve above-mentioned technical proposal, the technical solution adopted by the present invention are as follows:

A kind of experimental bench, comprising: sales counter panel；

Cabinet body, setting is in sales counter below the panel, for being supported while accommodating article to sales counter panel, in the cabinet body It is provided with the first accommodating cavity, is equipped with several step-like first partitions in parallel in first accommodating cavity, the first partition The lower one end of step is arranged close to the open side of first accommodating cavity, and outermost with the open side of first accommodating cavity It is reserved with space between side plane, a grasping mechanism, the bottom wall turn of the grasping mechanism and the space are equipped in the space Dynamic connection, and there is the first telescopic arm of short transverse stretching motion along the cabinet body and be placed on first partition for clamping Article the second telescopic arm, the front end of second telescopic arm is equipped with an openable and closable clamping jaw；

And cabinet door, the cabinet door include main door plate and several vertically-mounted to surround for holding with the main door plate The secondary door-plate of second accommodating cavity of placing articles, the pair door-plate are extended towards first accommodating cavity, second accommodating Intracavitary to be arranged in parallel with several second partitions for bearing article, top of the second partition far from the main door plate is predetermined Position is additionally provided with the retaining piece for being limited in the article being carried on the second partition on the second partition, described The both ends of retaining piece are separately fixed on secondary door-plate, are additionally provided on the main door plate by cooperating with main door plate around vierics Glassware to be further secured to the locating part on the second partition by ware；

The locating part includes: assembling block, is provided with two pieces, and cavity is offered in the main door plate, and the assembling block holds It sets in the cavity and slidingtype assembles along the vertical direction with main door plate；Rotating bar, the rotating bar are accommodated in the cavity It is interior and with the assembling block rotary type assemble；Fixed rope is spaced apart on the main door plate along same horizontal line and is equipped with several assembly Hole, the pilot hole are the kidney slot extended along the vertical direction, and the both ends of the fixed rope are each passed through two neighboring pilot hole To be fixed in the rotating bar, the fixed rope can be wound around the rotating bar；Torsional spring, the one end of torsional spring with it is described Assembling block mutually assembles, and the other end is mutually assembled with the rotating bar, and the torsional spring is used to provide driving force for the rotating bar to drive The rotating bar is moved to rotate and then make the fixed rope winding in the rotating bar；Screw rod extends along the vertical direction, the silk Bar is accommodated in the cavity, and with the assembling block Screw assembly, with the main door plate rotary type assemble；And knob, if It sets on the main door plate, is mutually assembled with the screw rod, for driving the screw rod rotation to drive the assembling block to slide.

Further, the locating part further includes two Assembly rails, and two Assembly rails are oppositely arranged on the rotating bar Two sides, the Assembly rail is L-shaped, including orthogonal first sub bar and the second sub bar, the freedom of first sub bar End and the assembling block fixing assembling, the free end of second sub bar are accommodated in the pilot hole and can be along the pilot holes It slides, the through-hole passed through for the fixed rope is offered on second sub bar.

Further, it is additionally provided on the fixed rope several for increasing connecing for the fixed rope and the glassware The gasket of contacting surface product.

Further, the gasket is that middle part is threaded through rubber block or sponge block on the fixed rope.

Further, the retaining piece is bar or baffle.

Further, the second partition is " L " type, including the loading plate and side plate being arranged in a mutually vertical manner, and it is described Side plate is arranged far from the main door plate.

Further, cushion is provided on the loading plate, being offered on the cushion for bottom is circular vierics The groove that ware is placed.

Further, it offers on the main door plate for the visual window inside user's observation experiment platform.

Technical solution of the present invention has the advantages that

1. experimental bench provided by the invention, by be arranged in the first accommodating cavity on the cabinet in step-like first every Plate, can be with so that the first accommodating cavity is divided by first partition, on the different steps by placing items within first partition The article placed at different depth in the first accommodating cavity is allowed to show different placing heights, so that can be straight It connects to take and is placed on article most inboard in the first accommodating cavity, taken again with needing first to move outermost article away in the prior art Most inboard article is taken to compare, present invention article of taking is more convenient；By the way that grasping mechanism is arranged, allow to by grabbing It takes mechanism to carry out automatically grabbing article, further improves the agility for article of taking；By the way that the second accommodating is arranged in cabinet door Chamber, so that the whole accommodating space of locker has been divided into two parts, and since a portion is arranged in cabinet door, so that cabinet Depth in the horizontal direction of body can reduce, so that the more convenient article taken in locker, sets secondly by cabinet door Second partition and retaining piece are set, so that, due to there is the position-limiting action of retaining piece, being placed on second when opening cabinet door Article on partition will not be fallen because of inertia and from second partition, finally, by the way that locating part is arranged on main door plate, limit Part and main door plate, which cooperate, opening around to which glassware to be fixed on second partition to prevent by glassware Due to the case where inertia causes glassware and retaining piece collides and ruptures when door, and due to the presence of locating part, Glassware is also avoided accidentally to be touched down when taking other article and broken situation generation, and limit provided by the invention Position part, including rotating bar, fixed rope and torsional spring need to only pull fixed rope to make when needing for glassware to be fixed Elastic deformation occurs for torsional spring, and fixed rope solves winding from rotating bar, then fixed rope is set on glassware, is finally decontroled Fixed rope, under the action of the restoring force of torsional spring, rotating bar, which rotates, winds fixed rope, that is, may make fixed rope with Glassware is fixed on second partition by the cooperation of main door plate, simple to operate, and by setting kidney slot for pilot hole, And assembling block, screw rod are set in the cavity of main door plate, knob is set on main door plate, allows and is driven by turning knob Screw rod rotates, and assembling block is assembled since it had not only been assembled with wire rod thread, but also with main door plate slidingtype, therefore works as screw rod When rotation, assembling block can be slided along the vertical direction, so as to adjust the rotating bar being mounted on assembling block in vertical side Upward position, and then the position of fixed rope is adjusted, locating part is adjusted according to the height of glassware, it is fixed Rope can be looped around suitable position on glassware, so that locating part can be adapted for the glassware of different height, expand The application of locating part is opened up.

2. locating part provided by the invention, by being arranged Assembly rail, Assembly rail includes orthogonal first sub bar and the Two sub bars offer the through-hole passed through for fixed rope on the second sub bar, and the free end of the first sub bar is mutually assembled with assembling block, and The free end of two sub bars can be slided along pilot hole, so that, when assembling block is slided along main door plate, the second sub bar can be sliding along pilot hole It is dynamic, and then fixed rope is driven to slide along pilot hole, a certain position on pilot hole is stuck in without with dress so as to avoid fixed rope The situation of movement with block and movement occurs.

3. locating part provided by the invention, by the way that gasket is arranged on fixed rope, gasket is for increasing fixed rope and glass Contact area between vessel, so that glassware can be fixed more stable.

4. partition provided by the invention, by setting partition on " L " type, so that small volume can also be placed on partition As glass bar one kind article, extend the application of experimental bench.

5. by the way that cushion is arranged on partition, and groove is arranged in locker provided by the invention on cushion, so that for example The bottoms such as round-bottomed flask are that circular glassware can be positioned to more stable on partition, have further expanded answering for experimental bench With.

6. locker provided by the invention allows user not need to beat by opening up visual window on main door plate Article inside experimental bench can be observed by opening cabinet door, convenient for users to looking for the article inside different experiments platform.

7. locker provided by the invention, by the way that transparency glass plate or transparent plastic sheet are arranged on visual window, it is therefore prevented that Dust enters inside locker from visual window, advantageously ensures that clean and tidy inside experimental bench.

Detailed description of the invention

It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor It puts, is also possible to obtain other drawings based on these drawings.

Fig. 1 is the explosive view of the experimental bench in the embodiment of the present invention 1；

Fig. 2 is the structural schematic diagram of the locating part in the embodiment of the present invention 1；

Fig. 3 is the structural schematic diagram of the partition and cushion in the embodiment of the present invention 1.

Description of symbols:

1, sales counter panel；2, cabinet body；21, first partition；22, grasping mechanism；221, the first telescopic arm；222, second is flexible Arm；223, clamping jaw；3, cabinet door；31, main door plate；311, pilot hole；32, secondary door-plate；4, second partition；41, cushion；5, barrier Part；6, locating part；61, rotating bar；62, fixed rope；63, torsional spring；64, gasket；65, assembling block；66, screw rod；67, knob；68, Assembly rail；7, visual window.

Specific embodiment

Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.

As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments It can be combined with each other at conflict.

Embodiment 1

As shown in Figure 1, the present embodiment is related to a kind of experimental bench, including sales counter panel 1, cabinet body 2 and cabinet door 3.

Cabinet body 2 is arranged below sales counter panel 1, and cabinet body 2 is for being supported sales counter panel 1 while for content Product.It is provided with the first accommodating cavity on cabinet body 2, several step-like first partitions 21 are equipped in parallel in the first accommodating cavity, in this reality It applies in example, the number of first partition 21 is one, and in other embodiments, the number of first partition 21 is also possible to two or more It is more, wherein the lower one end of the step of first partition 21 close to the first accommodating cavity open side be arranged, and with the first accommodating cavity It is reserved with space between the outermost side plane of open side, is equipped with a grasping mechanism 22, grasping mechanism 22 and space within this space Bottom wall rotation connection, and there is the first telescopic arm 221 of short transverse stretching motion along cabinet body 2 and be placed on for clamping Second telescopic arm 222 of the article on one partition 21, the front end of the second telescopic arm 222 are equipped with an openable and closable clamping jaw 223, and first The specific structure of telescopic arm 221, the second telescopic arm 222 and clamping jaw 223 is same as the prior art, and and therefore not to repeat here, root Length and the direction that the first telescopic arm 221 and the second telescopic arm 222 are adjusted according to the placement location for the article to be fetched, improve and take By the convenience and efficiency of article.

It is in step-like first partition 21 by being arranged in the first accommodating cavity on cabinet body 2, so that the first accommodating Chamber is divided by first partition 21, can make on the different steps by placing items within first partition 21 in the first accommodating cavity The article placed at interior different depth can show different placing heights, so that can directly take is placed on first Most inboard article in accommodating cavity, compared with first outermost article being moved away take most inboard article again in the prior art, Present invention article of taking is more convenient；By the way that grasping mechanism 22 is arranged, allow to carry out by grasping mechanism 22 automatically Article is grabbed, the agility for article of taking is further improved.

Cabinet door 3 includes that main door plate 31 and several and main door plate 31 are vertically-mounted to surround second for accommodating article The secondary door-plate 32 of accommodating cavity, secondary door-plate 32 are extended towards the first accommodating cavity, and in the present embodiment, the block number of secondary door-plate 32 is One piece, the block number of secondary door-plate 32 is also possible to two pieces or more in other embodiments, if being arranged in parallel in the second accommodating cavity The second partition 4 for bearing article is done, second partition 4 is additionally provided with far from the top predetermined position of main door plate 31 for that will hold The article being loaded on second partition 4 is limited in the retaining piece 5 on second partition 4, and the both ends of retaining piece 5 are separately fixed at a pair of of phase To on the secondary door-plate 32 of setting, in the present embodiment, second partition 4 is " L " type, and second partition 4 includes being arranged in a mutually vertical manner Loading plate and side plate, and side plate is arranged far from main door plate 31, so that it is lesser to place volume on second partition 4 Such as the article of glass bar one kind, the application of locker is extended, in other embodiments, second partition 4, which is also possible to one piece, puts down The plate of face structure, in the present embodiment, retaining piece 5 are set as bar, and in other embodiments, retaining piece 5 may be set to be Baffle.

By the way that the second accommodating cavity is arranged in cabinet door 3, so that the whole accommodating space of locker has been divided into two parts, and by It is arranged in cabinet door 3 in a portion, so that the depth in the horizontal direction of cabinet body 2 can reduce, so that more convenient take The article in locker is taken, secondly by second partition 4 and retaining piece 5 are arranged in cabinet door 3, so that when opening cabinet door 3 When, due to there is the position-limiting action of retaining piece 5, be placed on article on second partition 4 will not because of inertia and from second every It is fallen on plate 4.

In conjunction with Fig. 1 and Fig. 2, for further the glassware being placed on second partition 4 is fixed, in main door plate 31 On be additionally provided with by with main door plate 31 cooperate around glassware glassware to be fixed on to the locating part on second partition 4 6；Locating part 6 includes: rotating bar 61, fixed rope 62, torsional spring 63, assembling block 65, screw rod 66 and knob 67.

Offer cavity in main door plate 31, assembling block 65 be accommodated in cavity and with the slidingtype along the vertical direction of main door plate 31 Assembly, assembling block 65 are provided with two pieces, and rotating bar 61 is accommodated in cavity and both ends pass through bearing with two pieces of assembling blocks 65 respectively Rotary type assembly；It being spaced apart on main door plate 31 along same horizontal line and is equipped with several pilot holes 311, pilot hole 311 is kidney slot, and Pilot hole 311 is extended along the vertical direction, and the both ends of fixed rope 62 are each passed through two neighboring pilot hole 311 to be fixed on and turn In lever 61, fixed rope 62 can be wound around rotating bar 61, to reduce occupied space；63 one end of torsional spring is filled with 65 phase of assembling block Match, the other end and 61 phase of rotating bar are assembled, torsional spring 63 be used to provide driving force for rotating bar 61 with drive rotating bar 61 rotate into And make the winding of fixed rope 62 in rotating bar 61, when needing for glassware to be fixed, only fixed rope 62 need to be pulled to make Elastic deformation occurs for torsional spring 63, and fixed rope 62 solves winding from rotating bar 61, then fixed rope 62 is set on glassware, Fixed rope 62 is finally decontroled, under the action of the restoring force of torsional spring 63, rotating bar 61, which rotates, winds fixed rope 62, It may make fixed rope 62 and main door plate 31 cooperate glassware is fixed on second partition 4；Screw rod 66 is also accommodated in cavity It is interior, and screw rod 66 and 31 rotary type of main door plate assemble, with 65 Screw assembly of assembling block；Knob 67 is mounted on main door plate 31, rotation Button 67 and 66 fixing assembling of screw rod, can drive screw rod 66 to be rotated by turning knob 67, and then drive 65 edge of assembling block Vertical direction is slided, in this way, allow user according to the different rotary knob 67 of glassware height, thus Screw rod 66 is driven to be rotated, assembling block 65 is slided along main door plate 31 at this time, so that being mounted on two pieces of assembling blocks 65 Between rotating bar 61, the position of fixed rope 62 and torsional spring 63 in the vertical direction change so that fixed rope 62 can To be looped around on the suitable position of glassware.

By being arranged locating part 6 on main door plate 31, locating part 6 and main door plate 31 cooperate by glassware surround from And glassware is fixed on second partition 4, to prevent when opening the door since inertia causes glassware and retaining piece 5 The case where colliding and rupturing, and due to the presence of locating part 6, glassware is also avoided when taking other article It is accidentally touched down and broken situation generation.And by setting kidney slot for pilot hole 311, and in the cavity of main door plate 31 Knob 67 is arranged in interior setting assembling block 65, screw rod 66 on main door plate 31, and allowing makes fixed rope 62 by turning knob 67 Position change, allow user according to the position of the height adjustment fixed rope 62 of glassware, so that solid Surely rope 62 can be looped around on the suitable position of glassware, so that locating part 6 can be adapted for the vierics of different height Ware extends the application of locating part 6.

Since fixed rope 62 is flexible material, for avoid fixed rope 62 be stuck on a certain position of pilot hole 311 without with The situation of the movement of assembling block 65 and movement occurs, and also sets up that there are two Assembly rail 68, two 68 phases of Assembly rail on locating part 6 To the two sides that rotating bar 61 is arranged in, and Assembly rail 68 is L-shaped, and Assembly rail 68 includes orthogonal first sub bar and the Two sub bars, wherein the free end of the first sub bar and 65 fixing assembling of assembling block, the free end of the second sub bar is accommodated in pilot hole 311 It is interior and can be slided along pilot hole 311, the through-hole passed through for fixed rope 62 is offered on the second sub bar.In this way, making when dress When sliding with block 65 with the rotation of screw rod 66, Assembly rail 68 can be slided along pilot hole 311 therewith, be threaded through assembly to drive Fixed rope 62 on bar 68 is moved, to ensure that fixed rope 62 can also move when assembling block 65 slides.

To reinforce the stability that glassware is placed, it is additionally provided in fixation for increasing fixed rope 62 and glassware Contact area gasket 64, in the present embodiment, gasket 64 be rubber block, in other embodiments, gasket 64 can also be set It is set to sponge block.

As shown in figure 3, being so that bottom is that circular glassware can also stablize placement on second partition 4, second It is additionally provided with cushion 41 on the loading plate of partition 4, the groove placed for glassware is offered on cushion 41.

In addition, as shown in Figure 1, be also provided on main door plate 31 for the visual window 7 inside user's observation experiment platform, from And user is allowed not need to open cabinet door 3 and can observe article inside experimental bench, convenient for users to looking for not With the article inside experimental bench.To prevent dust from falling to inside experimental bench from visual window 7, it is additionally provided on visual window 7 Bright plastic plate is to close visual window 7, in other embodiments, transparency glass plate can also be arranged on visual window 7 to incite somebody to action Visual window 7 is closed, to guarantee clean and tidy inside experimental bench.

Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or It changes still within the protection scope of the invention.

Claims

1. a kind of experimental bench characterized by comprising

Sales counter panel (1)；

Cabinet body (2), setting are described for being supported while accommodating article to sales counter panel (1) below sales counter panel (1) It is provided with the first accommodating cavity in cabinet body (2), is equipped with several step-like first partitions (21), institute in parallel in first accommodating cavity The lower one end of step for stating first partition (21) is arranged close to the open side of first accommodating cavity, and accommodates with described first It is reserved with space between the outermost side plane of the open side of chamber, is equipped with a grasping mechanism (22) in the space, the gripper Structure (22) and the bottom wall in the space are rotatablely connected, and first with the short transverse stretching motion along the cabinet body (2) stretches Contracting arm (221) and the second telescopic arm (222) for clamping the article being placed on first partition (21), second telescopic arm Front end is equipped with an openable and closable clamping jaw (223)；

And cabinet door (3), the cabinet door (3) include main door plate (31) and it is several with the main door plate (31) it is vertically-mounted with The secondary door-plate (32) of the second accommodating cavity for accommodating article is surrounded, the pair door-plate (32) extends towards first accommodating cavity It is arranged, is arranged in parallel with several second partitions (4) for bearing article, the second partition (4) in second accommodating cavity Top predetermined position far from the main door plate (31) is additionally provided with the article limit for that will be carried on the second partition (4) The retaining piece (5) on the second partition (4) is made, the both ends of the retaining piece (5) are separately fixed on secondary door-plate (32), institute It states and is additionally provided on main door plate (31) by cooperating around glassware with main door plate (31) to further fix glassware Locating part (6) on the second partition (4)；

The locating part (6) includes: assembling block (65), is provided with two pieces, offers cavity, the dress in the main door plate (31) It is accommodated in the cavity with block (65) and slidingtype assembles along the vertical direction with main door plate (31)；Rotating bar (61), described turn Lever (61) is accommodated in the cavity and assembles with the assembling block (65) rotary type；Fixed rope (62), the main door plate (31) it is spaced apart on along same horizontal line and is equipped with several pilot holes (311), the pilot hole (311) extends along the vertical direction Kidney slot, the both ends of the fixed rope (62) are each passed through two neighboring pilot hole (311) to be fixed on the rotating bar (61) On, the fixed rope (62) can be wound around the rotating bar (61)；Torsional spring (63), described torsional spring (63) one end and the dress It is mutually assembled with block (65), the other end is mutually assembled with the rotating bar (61), and the torsional spring (63) is used to be the rotating bar (61) Driving force is provided to drive the rotating bar (61) to rotate and then make the fixed rope (62) winding on the rotating bar (61)； Screw rod (66), extends along the vertical direction, and the screw rod (66) is accommodated in the cavity, and fills with the assembling block (65) screw thread Match, is assembled with main door plate (31) rotary type；And knob (67), it is arranged on the main door plate (31), with the screw rod (66) it mutually assembles, for driving the screw rod (66) rotation to drive the assembling block (65) to slide.

2. experimental bench according to claim 1, which is characterized in that the locating part (6) further includes two Assembly rails (68), Two Assembly rails (68) are oppositely arranged on the two sides of the rotating bar (61), and the Assembly rail (68) is L-shaped, including mutually hang down Straight the first sub bar and the second sub bar, the free end of first sub bar and the assembling block (65) fixing assembling, described the The free end of two sub bars is accommodated in the pilot hole (311) and can slide along the pilot hole (311), on second sub bar Offer the through-hole passed through for the fixed rope (62).

3. experimental bench according to claim 1, which is characterized in that be additionally provided on the fixed rope (62) several for increasing The gasket (64) of the contact area of the big fixed rope (62) and the glassware.

4. experimental bench according to claim 3, which is characterized in that the gasket (64) is that middle part is threaded through the fixed rope (62) rubber block or sponge block on.

5. experimental bench according to claim 1, which is characterized in that the retaining piece (5) is bar or baffle.

6. experimental bench according to claim 1, which is characterized in that the second partition (4) is " L " type, including mutually hangs down The loading plate and side plate being directly arranged, and the side plate is arranged far from the main door plate (31).

7. experimental bench according to claim 5, which is characterized in that it is provided on the loading plate cushion (41), it is described soft The groove placed for bottom for circular glassware is offered on pad (41).

8. experimental bench according to claim 1, which is characterized in that offer on the main door plate (31) and observed for user Visual window (7) inside experimental bench.

9. experimental bench according to claim 8, which is characterized in that be provided on the visual window (7) for preventing dust Into the transparency glass plate or transparent plastic sheet of experimental bench.