Experimental bench

Abstract

To provide a laboratory table in which a preserved lid member does not interfere experiment, in which the lid member can be sanitarily and safely preserved, and a simplified structure, weight reduction and improvement of durability of a preservation structure of the lid member can be achieved.SOLUTION: There is provided a laboratory table comprising: a core part 2 on which a sink 4 is provided; and a top plate 2A on the core part 2. In the laboratory table 1, there are provided: a lid member 9 for detachably covering a top face opening of the sink 4; an opening 2a which is formed on a peripheral face of the core part 2 below the sink 4 and which has a width at least equal to that of the lid member 9; a storage space S which is formed in the core part 2 and stores the lid member 9 detached from the sink 4 through the opening 2a; a back plate 10 which holds in a standing posture, the lid member 9 detached from the sink 4 and stored in the storage space S; and holding means using a guide wire 12.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a laboratory bench having a core part provided with a sink on the upper part.

Background Art

[0002] For example, in a science classroom in a school or a laboratory in a research institute, laboratory benches for various experiments are installed. Such laboratory benches include a core part provided with a sink for washing hands or rinsing chemicals with water on the upper part, and a tabletop made of a table adjacent to the core part. In such a laboratory bench, when the sink is not in use, the upper surface opening of the sink is covered by a detachable rectangular flat lid member, and a wide working space is secured by the upper surface of this lid member and the tabletop.

[0003] When it becomes necessary to use the sink in the above laboratory bench, the lid member covering the upper surface opening of the sink is removed, but the storage location of the removed lid member becomes a problem. For example, when dirt adheres to the lid member, there are problems in terms of hygiene and safety during storage, and depending on the storage location, it may interfere with the work of using the sink.

[0004] Regarding this point, Patent Document 1 proposes a laboratory bench in which, as shown in FIG. 18, the removed lid member 109 is stored in a state of being vertically suspended on the front side of the sink 104 of the core part 102. According to this laboratory bench, as shown in FIG. 18(a), when the sink 104 is not in use, the upper surface opening of the sink 104 is covered by the lid member 109. Then, when using the sink 104, hold the pair of left and right handles 121 provided on the upper surface of the lid member 109 to remove the lid member 109 from the sink 104, and hook a pair of left and right hooks (not shown) provided on the back surface of the removed lid member 109 on a pair of left and right U-shaped engaged members 122 (see FIG. 18(a)) protruding from the front surface of the core part 102, whereby, as shown in FIG. 18(b), the lid member 109 is stored in a vertically suspended state.

Prior Art Documents

Patent Document

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, in the experimental bench proposed in Patent Document 1, as shown in Fig. 18(b), the lid member 109 stored in a vertically suspended state is exposed on the front side of the core portion 102. Therefore, when an experimenter such as a student or a researcher stands in front of the sink 104, problems such as the experimenter's thigh naturally touching the lid member 109 or the side portion of the lid member 109 hitting the experimenter when the experimenter moves laterally in front of the sink 104 may occur. In addition, if the lid member 109 with a surface contaminated with chemicals or the like is vertically suspended and supported in an exposed state, the problems of hygiene and safety are not eliminated. Furthermore, if the experimenter's body or moving instruments and devices come into contact with or collide with the suspended lid member 109, the locking members provided on the lid member 109 and the core portion 102 may be damaged, resulting in the fear of the lid member 109 falling or being damaged, or personal injury due to the fall of the lid member 109.

[0007] Also, in the experimental bench proposed in Patent Document 1, a handle 121 protrudes from the surface of the lid member 109, and a plurality (four) of protrusions as buffer materials are attached to the back surface in addition to the hook. Therefore, there is a problem that the number of parts of the lid member 109 increases, leading to the complication and high weight of the structure of the lid member 109. And if the operation of removing the lid member 109 from the sink 104 and vertically suspending and supporting it is repeated many times, damage or injury may occur at the location where the lid member 109 is suspended and supported, and it may become impossible to stably suspend and store the lid member 109 over a long period of time.

[0008] The present invention has been made in view of the above problems, and its object is to provide a laboratory bench that can store a lid member removed from a sink without disturbing the experimenter, can store the lid member hygienically and safely, and can simplify and reduce the weight of the structure of the lid member and improve the durability of the storage structure.

Means for Solving the Problems

[0009] To achieve the above object, the present invention provides a core part having a sink provided on the upper part, and a laboratory bench having a top plate on the core part, a lid member that detachably covers the upper surface opening of the sink, an opening formed on the outer peripheral surface of the core part below the sink and having at least the width of the lid member, a storage space formed inside the core for storing the lid member removed from the sink through the opening, and holding means for supporting the lid member removed from the sink and stored in the storage space in an upright posture.

[0010] Here, the holding means includes either one or both of a back plate disposed inside the storage space so that the rear surface of the lid member stored in the storage space faces it, and locking means for detachably locking the stored lid member.

Effects of the Invention

[0011] According to the present invention, when using the sink, the lid member is removed from the sink, the removed lid member is stored in the storage space through the opening of the core part, and the lid member is held in an upright state including an inclined state by the holding means, so that the lid member can be stably stored in the storage space. In this case, since the lid member hardly protrudes from the outer peripheral surface of the core part, the lid member does not interfere with the experimenter, and there are no hygienic and safety problems caused by the exposed dirty lid member to the outside.

[0012] And, since the lid member stored in an inclined state within the storage space can be reliably held within the storage space by a simple configuration that only locks the lid member by the locking means, the structure of the lid member is simplified and the weight of the lid member can be reduced, and the attachment / detachment of the lid member can be easily performed. Further, since a locking means having a simple structure can be used, even if the storage of the lid member in the storage space and the removal from the storage space are repeated a large number of times, the locking means will not be damaged or impaired, and the durability of the storage structure of the lid member is enhanced.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

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Figure 12

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Figure 16

Figure 17

Figure 18

Embodiments for Carrying Out the Invention

[0014] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. <Embodiment 1> FIG. 1 is a front view of the experimental table according to Embodiment 1 of the present invention, FIG. 2 is a plan view of the same experimental table, FIG. 3 is a side view of the same experimental table, FIG. 4 is an enlarged front view of the core part of the same experimental table, FIG. 5 is a partial sectional view taken along line A-A of FIG. 4, FIG. 6 is an enlarged detailed view of part B of FIG. 5, and FIGS. 7(a) to (e) are partial side sectional views of the core part showing the procedure of storing and keeping the lid member of the experimental table according to Embodiment 1 of the present invention in order of the steps. In the following description, the directions indicated by the arrows in FIGS. 1 to 3 are defined as the "up and down", "left and right", and "front and back" directions, respectively.

[0015] The experimental table according to the present invention is installed on the floor surface FL such as in a science classroom of a school. In the experimental table 1 shown as an example in FIGS. 1 and 2, it includes a rectangular box-shaped core part 2 installed at the center in the width direction, and a pair of tables 3 installed adjacent to the core part 2 on the left and right thereof.

[0016] On the upper parts of two positions, before and after, of the above-described core part 2, a pair of ceramic sinks 4 with upward openings are arranged in a face-to-face manner. On the back side of each sink 4 (the back side for the experimenter standing in front of each sink 4), a pair of left and right faucet spouts 5 bent in an inverted U shape are respectively erected, and an on-off valve 6 is arranged at the base of each faucet spout 5 (see Fig. 1). Further, on the left and right of the flat top plate 2A (see Figs. 1 and 2) formed at the center of the upper surface of the core part 2, a total of four front and rear gas taps 7 for connecting a gas burner or the like are erected. Here, the upper surface of the top plate 2A is a decorative surface.

[0017] Also, as shown in Figs. 1 to 3, the pair of left and right tables 3 each have a horizontal rectangular flat plate-shaped top plate 3A at their upper parts, and both left and right end portions of each top plate 3A are horizontally supported by the core part 2 and rectangular plate-shaped supports 8. Here, the upper surface of each top plate 3A is a decorative surface.

[0018] By the way, in the experimental bench 1 according to the present embodiment, the upper surface opening of the unused sink 4 is covered by a rectangular flat plate-shaped lid member 9. Here, the pair of faucet spouts 5 that stand vertically during use are laid down and stored in the sink 4 when not in use, so that these faucet spouts 5 and the lid member 9 do not interfere with each other. Here, the upper surface of the lid member 9 covering the upper surface opening of the sink 4 is a decorative surface 9a, and in the state where the lid member 9 covers the sink 4, the decorative surface 9a of the lid member 9, the top plates 3A of the left and right tables 3, and the top plate 2A of the core part 2 are located on the same horizontal plane (flush state), and a wide working space is secured on the experimental bench 1.

[0019] Also, as shown in Fig. 5, a storage space S having an opening 2a described later is formed below each sink 4 (only one side (front side) is shown in Fig. 5) of the rectangular box-shaped core part 2. On the outer peripheral surface below each sink 4 of the core part 2, in the example of the figure, on the surface 2B facing the experimenter standing in front of the sink 4, as shown in Figs. 4 and 5, a rectangular opening 2a having at least the left and right widths of the lid member 9 is formed and is continuous with the storage space S.

[0020] Then, as shown in FIG. 5, in the vicinity of the opening 2a of the storage space S (the back side of the storage space S), a rectangular flat back plate 10 that covers the opening 2a from the inside of the storage space is disposed in a state of being obliquely inclined with respect to the vertical (the upper side is inclined forward). Specifically, the back plate 10 is disposed so as to be obliquely inclined (forward inclined) by an angle α shown in the figure with respect to the vertical such that the upper end portion approaches the opening 2a.

[0021] Also, as shown in FIG. 4, in the vicinity of the upper opening 2a of the storage space S of the core portion 2, there is provided a guide wire 12 having a horizontally long substantially concave pressing portion 12a that protrudes and bends by a predetermined length from both left and right ends that are rotatably supported by support members 11 whose left and right ends are fixed to both side walls 2C of the storage space S. Here, flat plate-shaped support members 11 are respectively attached to the upper inner surfaces of the left and right side walls 2C that define the storage space S of the core portion 2 by screws 13, and both left and right end portions of the guide wire 12 are rotatably supported by these support members 11.

[0022] More specifically, the guide wire 12 is composed of a round bar-shaped metal bar, and as shown in FIG. 4, a horizontally long substantially concave pressing portion 12a that protrudes and bends by a predetermined length from both left and right ends is provided at the center in the width direction thereof. The guide wire 12 constitutes a locking means for locking a part of the lid member 9 when the lid member 9 is stored in the storage space S of the core portion 2 as described later. When the lid member 9 is not stored in the storage space S, the pressing portion 12a of the guide wire 12 is at the position a shown in FIG. 5 and is obliquely inclined with respect to the vertical toward the back plate 10, and is received by the back plate 10 by its own weight.

[0023] By the way, in the experimental table 1 according to the present embodiment, when the sink 4 is not used as described above, the upper surface opening of the sink 4 is covered by the lid member 9, but when the sink 4 is used, the lid member 9 is removed from the sink 4, and the removed lid member 9 is introduced into the storage space S from the opening 2a that opens to the core portion 2 and is obliquely stored along the back plate 10.

[0024] Here, the back plate 10 disposed obliquely inside the storage space S so that at least a part of the decorative surface 9a of the lid member 9 stored in the storage space S abuts against the back plate 10, and the guide wire 12 which is a locking means for detachably locking the lid member 9 stored in the storage space S constitute a holding means for holding the lid member 9 stored in the storage space S in an inclined upright position. Note that in the present embodiment 1, the holding means is constituted by the back plate 10 and the guide wire 12 which is the locking means, but in the present invention, the holding means may be constituted by only either the back plate 10 or the guide wire 12. This point is the same in the embodiments 2 to 4 described below.

[0025] Incidentally, resin positioning blocks 14 (only one of which is shown in Figs. 5 and 6) are fixed in parallel along the front-rear direction (left-right direction in Figs. 5 and 6) at two left and right positions on the bottom plate 2D of the storage space S. Here, the positioning blocks 14 are for guiding and positioning both lower ends of the lid member 9 in the width direction when the lid member 9 is introduced into the storage space S, and as shown in detail in Fig. 6, a V-shaped engagement groove 14a is formed in part of the positioning block 14 for engagement with the lower end of the lid member 9 in the width direction.

[0026] Here, in the laboratory bench 1 of this embodiment 1, the lid member 9 that covers the top opening of the sink 4 when the sink 4 is not in use is removed from the sink 4 when the sink 4 is in use and stored in the storage space S within the core part 2. Below, the procedure for storing the lid member 9 in the storage space S will be explained with reference to Figures 7(a) to (e).

[0027] When the sink 4 is in use, as shown in Fig. 7(a), the upper opening of the sink 4 is covered by the cover member 9. At this time, as described above, the guide wire 12 constituting the locking means has its central retaining portion 12a raised obliquely, and is supported by its own weight against the back plate 10 and held in the illustrated position (position a shown in Fig. 5).

[0028] When using the sink 4, as shown in FIG. 7(b), the lid member 9 covering the upper surface opening of the sink 4 is manually removed from the sink 4, and the removed lid member 9 is introduced into the storage space S through the opening 2a opening to the outer peripheral surface 2B of the core portion 2. Then, the lid member 9 introduced into the storage space S is moved toward the back side of the storage space S while both lower end portions in the width direction thereof are guided by the resin positioning blocks 14, and as shown in FIG. 7(c), it is manually held in an upright state inclined at the same inclination angle α as the back plate 10 with its decorative surface (upper surface) 9a substantially in close contact with the back plate 10 (the state shown by the chain line in FIG. 5). The lid member 9 can be made to abut partially with the back plate 10 at the position of the engagement groove 14a of the positioning block 14 so as not to be in full contact overall. In this way, even if the upper surface 9a is soiled by chemicals or experimental animals, for example, body fluids of dissected organisms or various bacteria adhering to plants, it is possible to avoid the soiling transferring to the back plate 10.

[0029] Next, from the state shown in FIG. 7(c) (the state shown by the chain line in FIG. 5), the guide wire 12 is manually rotated in the direction of the arrow shown in FIG. 7(d) (counterclockwise). Then, the holding portion 12a of the guide wire 12 hangs vertically by its own weight (rotates to the position b shown in FIG. 5). And when the hand supporting the lid member 9 is released from the lid member 9 in this state, the lid member 9 rotates counterclockwise about its lower edge due to the counterclockwise moment by its own weight, but this rotation is blocked by the holding portion 12a of the guide wire 12 engaging with the upper part of the lid member 9 over the entire width. That is, the lid member 9 is prevented from falling by the holding portion 12a of the guide wire 12 locking the upper part of its front surface over substantially the entire width, and as shown in FIGS. 7(e) and 5, it is held in an upright state inclined by the illustrated angle β (>α) with respect to the vertical and stored in the storage space S. At this time, the holding portion 12a of the guide wire 12 is at the position c shown in FIG. 5.

[0030] Here, on the lid member 9 in the state shown by the dashed line in FIG. 5, a counterclockwise moment M that tries to topple it acts. This moment M can be obtained by the following formula, where W is the self-weight of the lid member 9 and L is the distance from the end of the center of gravity G of the lid member 9.

[0031] M = W·sinβ·L The lid member 9 stored in the storage space S in the above manner will not fall as long as the guide wire 12 is not intentionally lifted to release the locking to the lid member 9. Therefore, it is stably stored and held in the storage space S.

[0032] When the sink 4 is not in use, from the state shown in FIG. 7(e), the lid member 9 is tilted to the back side and brought into a state where it is substantially in contact with the back plate 10. Then, the guide wire 12 is lifted and rotated to the a position shown in FIG. 5 and leaned against the back plate 10 to release the locking of the guide wire 12 with the lid member 9. The lid member 9 is taken out from the storage space S in the reverse procedure of the storage time, and the taken-out lid member 9 can be placed on the sink 4 from above as shown in FIG. 7(a) to cover the upper surface opening of the sink 4 with the lid member 9.

[0033] As described above, according to the experimental bench 1 according to the first embodiment, when the sink 4 is used, the lid member 9 removed from the sink 4 is stored in the storage space S through the opening 2a of the core part 2. The lid member 9 is also tilted within the storage space S along the back plate 10 disposed obliquely in the storage space S, and the upper part of the front surface of the lid member 9 is locked by the guide wire 12 over substantially the entire width, so that the lid member 9 can be stably held in the storage space S. In this case, since the lid member 9 hardly protrudes from the outer peripheral surface of the core part 2, the lid member 9 does not interfere with the experimenter, and there are no hygienic and safety problems caused by the exposed dirty lid member 9 to the outside. In the first embodiment, when the lid member 9 is stored in the storage space S with the decorative surface 9a facing the back plate 10, even if the experimenter kicks the lid member 9 with shoes or the like, the decorative surface 9a of the lid member 9 will not be damaged or soiled, and the durability of the lid member 9 is enhanced.

[0034] Furthermore, because the simple configuration of merely engaging a portion of the lid member 9, which is housed in an inclined state within the storage space S, with the guide wire 12 allows the lid member 9 to be stored in a securely housed state within the storage space S, the structure of the lid member 9 is simplified, the weight of the lid member 9 is reduced, and the lid member 9 can be easily attached / detached. Furthermore, because the guide wire 12, which has a simple structure, can be used as the engaging means, even if the lid member 9 is repeatedly stored in and removed from the storage space S many times, the guide wire 12 is not broken or damaged, and the durability of the storage structure for the lid member 9 is increased.

[0035] Furthermore, in the first embodiment, both lower ends in the width direction of the lid member 9 stored in the storage space S are guided and positioned by the positioning block 14 arranged on the bottom plate 2D of the storage space S, which provides the effect of preventing damage to the bottom plate 2D and the back plate 10 due to friction between the lid member 9 and the bottom plate 2D or the back plate 10. The positioning block 14 is not limited to the embodiment. For example, it may be integral with the bottom plate 2D, and the engagement groove 14a may be a convex engagement protrusion. The material of the positioning block 14 may be selected appropriately from metal, wood, and other materials other than resin, and it is sufficient that the positioning block 14 has a configuration that can function as a stopper for the lower end of the lid member 9, if necessary.

[0036] <Embodiment 2> Next, a second embodiment of the present invention will be described below with reference to FIGS.

[0037] FIG. 8 is a front view of the core part of the laboratory bench according to embodiment 2 of the present invention, FIG. 9 is a partial cross-sectional view taken along line CC in FIG. 8, FIG. 10 is an exploded oblique view of the retaining part, and FIGS. 11(a) to (d) are partial cross-sectional side views showing the steps for storing the cover member of the laboratory bench according to embodiment 2 of the present invention in order of steps. In these figures, the same elements as those shown in FIGS. 1 to 7 are given the same symbols, and repeated explanations of these elements will be omitted below.

[0038] In this embodiment 2, only the locking means of the cover member 9 is different from that of the embodiment 1, and the other configurations are the same as those of the laboratory bench 1 according to the embodiment 1. In this embodiment 2, the locking means is composed of a concave retainer 15 having a generally concave shape in front view, both ends of which are rotatably supported at the center in the width direction of the upper part of the back plate 10.

[0039] The concave holding portion 15 is formed by bending a round metal rod as shown in Fig. 10. Specifically, the concave holding portion 15 is formed in a generally concave shape in front view, protruding and bending at a predetermined length from both the left and right ends, and a hook-shaped locking portion 15a is formed at the tip of the concave holding portion 15, bending into a generally L-shape in side view. In addition, both left and right ends of the concave holding portion 15 form shaft portions 15b extending horizontally in the lateral direction, and these shaft portions 15b are inserted into bearing portions 17a formed in a metal bracket 17 attached to the back plate 10 by screws 16, so that the concave holding portion 15 is supported by the back plate 10 so as to be rotatable up and down around the left and right shaft portions 15b.

[0040] Thus, in this embodiment 2 as well, the lid member 9 that covers the top opening of the sink 4 when the sink 4 is not in use is removed from the sink 4 when the sink 4 is in use and stored in the storage space S within the core part 2. Below, the manner in which the lid member 9 is stored in the storage space S will be explained with reference to Figures 11(a) to (d).

[0041] When the sink 4 is in use, as shown in Fig. 11(a), the upper opening of the sink 4 is covered by the cover member 9. At this time, the concave retaining portion 15 constituting the locking means is in a state of hanging down vertically due to its own weight (position indicated by d in Fig. 9).

[0042] When using the sink 4, as shown in Fig. 11(b), the lid member 9 covering the upper surface opening of the sink 4 is removed from the sink 4, and the removed lid member 9 is introduced into the storage space S through the opening 2a that opens into the core portion 2. Then, as shown in Fig. 11(c), the lid member 9 introduced into the storage space S is pushed into the back side of the storage space S in a state where the concave holding portion 15 is lifted upward (the position shown by e in Fig. 9), and its decorative surface (upper surface) 9a is kept in a state of being inclined at substantially the same inclination angle as the back plate 10 in a state of being substantially in contact with the back plate 10.

[0043] Next, if the hand that was supporting the lid member 9 is released from the lid member 9 from the state shown in Fig. 11(c), the lid member 9 will fall due to the counterclockwise moment acting on it. However, as shown in Fig. 11(d), the concave holding portion 15 rotates downward (counterclockwise) to the position f shown in Fig. 9 by its own weight, and its locking portion 15a locks the upper edge of the lid member 9. Therefore, the fall of the lid member 9 is prevented by the concave holding portion 15, and as shown in Figs. 9 and 11(d), the lid member 9 is held in an upright state inclined with respect to the vertical and stored in the storage space S.

[0044] The lid member 9 stored in the storage space S in the above manner will not fall unless the concave holding portion 15 is intentionally lifted to release the locking to the lid member 9, so it is stably stored and kept in the storage space S.

[0045] When not using the sink 4, from the state shown in Figs. 9 and 11(d), the lid member 9 is tilted to the back side to be in a state of being substantially in contact with the back plate 10, and as shown in Fig. 11(c), the concave holding portion 15 is lifted upward to release the locking of the locking portion 15a with the lid member 9. The lid member 9 is taken out of the storage space S in the reverse procedure of the storage, and the taken-out lid member 9 can be placed on the sink 4 from above as shown in Fig. 11(a) to cover the upper surface opening of the sink 4 with the lid member 9.

[0046] As described above, also in the second embodiment, when the sink 4 is used, the lid member 9 removed from the sink 4 is stored in the storage space S through the opening 2a of the core part 2, and the lid member 9 is also inclined within the storage space S along the back plate 10 disposed obliquely in the storage space S, and the upper part of the lid member 9 is locked by the concave holding part 15, so that the lid member 9 can be stably stored in the storage space S. In this case, since the lid member 9 hardly protrudes from the outer peripheral surface of the core part 2, the lid member 9 does not interfere with the experimenter, and there are no hygienic and safety problems caused by the exposed dirty lid member 9 to the outside.

[0047] In addition, also in the second embodiment, the same effects as those obtained in the first embodiment can be obtained.

[0048] <Embodiment 3> Next, the third embodiment of the present invention will be described below with reference to FIGS. 12 to 14.

[0049] FIG. 12 is a front view of the core part of the experimental bench according to the third embodiment of the present invention, FIG. 13 is a partial cross-sectional view taken along line D-D of FIG. 12, and FIGS. 14(a) to (d) are front views and partial side cross-sectional views of the core part showing the steps of storing and holding the lid member of the experimental bench according to the third embodiment of the present invention in order. Also in these figures, the same elements as those shown in FIGS. 1 to 7 are denoted by the same reference numerals, and the repeated description thereof will be omitted below.

[0050] In the third embodiment, only the locking means of the lid member 9 is different from that in the first and second embodiments, and other configurations are the same as those of the experimental bench 1 according to the first and second embodiments. In the third embodiment, the locking means is constituted by a stopper plate 18 supported by a support shaft 18a such as a screw so as to be rotatable about one longitudinal end on the upper part of the inner surface at the center in the width direction of the periphery of the opening 2a of the core part 2. This stopper plate 18 usually hangs vertically as shown in FIGS. 12 and 13 by its own weight.

[0051] And also in the third embodiment, when the sink 4 is not in use, the lid member 9 that covers the upper surface opening of the sink 4 is removed from the sink 4 and stored in the storage space S in the core part 2 when the sink 4 is used. Hereinafter, the procedure for storing and keeping the lid member 9 in the storage space S will be described according to FIGS. 14(a) to (d).

[0052] When using the sink 4, as shown in FIG. 14(a), the upper surface opening of the sink 4 is covered by the lid member 9. At this time, the stopper plate 18 constituting the locking means is in a state of hanging vertically due to its own weight.

[0053] When using the sink 4, as shown in FIG. 14(b), the lid member 9 that covered the upper surface opening of the sink 4 is removed from the sink 4, and the removed lid member 9 is introduced into the storage space S through the opening 2a that opens into the core part 2. Then, as shown in FIG. 14(c), the lid member 9 introduced into the storage space S is pushed into the back side of the storage space S in a state where the stopper plate 18 is lifted upward (retracted horizontally), and its decorative surface (upper surface) 9a is kept in a state of being inclined at the same inclination angle as the back plate 10 in a state of being substantially in contact with the back plate 10.

[0054] Next, if the hand is released from the stopper plate 18 and the lid member 9 in the state shown in FIG. 14(c), as shown in FIG. 14(d), the stopper plate 18 hangs vertically due to its own weight, and the lid member 9 falls due to the counterclockwise moment acting on it. However, the fall of the lid member 9 is blocked by the stopper plate 18 engaging with the upper part in the width direction of the lid member 9, and the lid member 9 is held in an upright state inclined with respect to the vertical and stored in the storage space S.

[0055] The lid member 9 stored and kept in the storage space S in the above-described manner will not fall unless the stopper plate 18 is intentionally rotated to release the locking to the lid member 9, so it is stably stored and kept in the storage space S.

[0056] When the sink 4 is not used, starting from the state shown in Fig. 14(d), the lid member 9 is tilted backward and brought into a state where it is substantially in contact with the back plate 10. As shown in Fig. 14(c), the stopper plate 18 is rotated upward to retract it from the opening 2a, and the lid member 9 is taken out from the storage space S in the reverse procedure of the storage procedure. The taken-out lid member 9 is placed on the sink 4 from above as shown in Fig. 14(a) to cover the upper surface opening of the sink 4 with the lid member 9.

[0057] As described above, also in the third embodiment, when the sink 4 is used, the lid member 9 removed from the sink 4 is stored in the storage space S through the opening 2a of the core part 2. The lid member 9 is also inclined within the storage space S along the back plate 10 disposed obliquely in the storage space S, and the upper part of the lid member 9 is locked by the stopper plate 18, so that the lid member 9 can be stably stored in the storage space S. In this case, since the lid member 9 hardly protrudes from the outer peripheral surface of the core part 2, as in the first and second embodiments, the lid member 9 does not interfere with the experimenter, and there are no hygienic and safety problems caused by the exposed dirty lid member 9 to the outside.

[0058] In addition, also in the third embodiment, the same effects as those obtained in the first and second embodiments can be obtained.

[0059] <Fourth Embodiment> Next, a fourth embodiment of the present invention will be described below with reference to Figs. 15 to 17.

[0060] Fig. 15 is a front view of the core part of the experimental bench according to the fourth embodiment of the present invention, Fig. 16 is a partial cross-sectional view taken along line E-E of Fig. 15, and Figs. 17(a) to (d) are front views and partial side cross-sectional views of the core part showing the procedure for storing and preserving the lid member of the experimental bench according to the fourth embodiment of the present invention in the order of the steps. Also in these figures, the same reference numerals are given to the same elements as those shown in Figs. 1 to 7, and the repeated description thereof will be omitted below.

[0061] In the fourth embodiment, only the locking means of the lid member 9 is different from that in the first to third embodiments, and other configurations are the same as those of the experimental table 1 according to the first to third embodiments. In this embodiment, the locking means is composed of a pair of rectangular plate-shaped locking blocks 20 whose lower ends are rotatably supported by screws 19 at both upper parts in the width direction on the peripheral edge of the opening 2a of the core part 2. Here, as shown in FIG. 15, the rotation center (the center of the screw 19) of each locking block 20 is offset by ε toward the outside in the width direction with respect to the center in the width direction of the locking block 20.

[0062] Thus, also in the fourth embodiment, when the sink 4 is not in use, the lid member 9 that covers the upper surface opening of the sink 4 is removed from the sink 4 and stored in the storage space S in the core part 2 when the sink 4 is used. Hereinafter, the storage procedure for storing the lid member 9 in the storage space S will be described with reference to FIGS. 17(a) to (d).

[0063] When the sink 4 is not in use, the upper surface opening of the sink 4 is covered by the lid member 9. At this time, the left and right pair of locking blocks 20 that constitute the locking means are in a state of tilting inward toward the opening 2a due to their own weight (a state where the left and right locking blocks 20 are substantially in a V shape when viewed from the front). That is, as described above, since the rotation center of each locking block 20 is offset by ε toward the outside in the width direction (opposite to the opening 2a) with respect to the center in the width direction of the locking block 20, each locking block 20 is in a state of tilting inward toward the opening 2a due to its own weight (a state where the left and right locking blocks 20 are substantially in a V shape when viewed from the front) as shown in FIGS. 15 and 17(a) when no external force acts on it. Note that the tilt angle of each locking block 20 is regulated by a notch or a stopper (not shown).

[0064] When using the sink 4, as shown in Fig. 17(a), the lid member 9 that covered the upper surface opening of the sink 4 is removed from the sink 4, and the removed lid member 9 is introduced into the storage space S through the opening 2a that opens to the core part 2. When the lid member 9 is introduced, the upper end of the lid member 9 supported by the engaging groove 14a of the positioning block 14 is pushed into the back side of the storage space S with the lower end as the rotation center. Along with this pushing, the left and right outer sides of the lid member 9 abut against the opposing inner sides of the left and right locking blocks 20 that are inclined in a substantially inverted V shape, and rotate the locking blocks 20 around the screw 19 in the direction of retracting from the opening 2a (Fig. 17(b)).

[0065] If the upper end of the lid member 9 is further pushed into the back side of the storage space S like this, the lid member 9 passes over the rotating left and right locking blocks 20, and the upper surface 9a comes into a state of being substantially in contact with the front surface of the back plate 10 (Fig. 17(c) → Fig. 17(d)). On the other hand, the left and right locking blocks 20 that the lid member 9 has passed through rotate back to their original positions by their own weight and are located in front of the lid member 9. Therefore, when the hand pushing the lid member 9 is released, the lid member 9 that tends to fall forward is supported by the locking blocks 20 that have returned to their original positions, and the lid member 9 is locked (Fig. 17(d)).

[0066] As described above, the lid member 9 shown in Figs. 16 and 17(d) is held in an upright state inclined with respect to the vertical and stored in the storage space S.

[0067] The lid member 9 stored in the storage space S in the above manner will not fall as long as the left and right locking blocks 20 are not intentionally and simultaneously rotated to retract from the opening 2a, so it is stably stored and kept in the storage space S.

[0068] When the use of the sink 4 is finished, starting from the states shown in FIGS. 16 and 17(d), the lid member 9 is tilted backward to be substantially in close contact with the back plate 10, and the left and right locking blocks 20 are rotated (substantially upright) to the retracted side from the opening 2a as shown in FIG. 17(c), thereby releasing the locking of the lid member 9 by the locking blocks 20. Since the unlocked lid member 9 falls forward by its own weight, it is received by hand, and the lid member 9 is taken out from the storage space S in the reverse procedure of the storage time, and the lid member 9 can be placed over the sink 4 from above to cover the upper surface opening of the sink 4 with the lid member 9.

[0069] As described above, also in the fourth embodiment, when using the sink 4, the lid member 9 removed from the sink 4 is stored in the storage space S from the opening 2a of the core part 2, and the lid member 9 is also inclined in the storage space S along the back plate 10 disposed obliquely in the storage space S, and the upper part of the lid member 9 is locked by the left and right locking blocks 20, whereby the lid member 9 can be stably stored in the storage space S in an upright state. In this case, since the lid member 9 hardly protrudes from the outer peripheral surface of the core part 2, the lid member 9 does not interfere with the experimenter, and there are no hygienic and safety problems caused by the exposed dirty lid member 9 to the outside.

[0070] In addition, also in the fourth embodiment, the same effects as those obtained in the first to third embodiments can be obtained.

[0071] In the above first to fourth embodiments, an example was shown in which the back plate 10 was all installed in the storage space S in a forward-tilted posture (angle α). Although not shown, the present invention may be provided with the back plate 10 in a backward-tilted posture or a substantially upright posture. In the storage space S provided with the back plate 10 in a backward-tilted posture, the lid member 9 can be supported by leaning against the backward-tilted back plate 10, so that the locking means may not be provided. Further, when the back plate 10 is substantially upright, since the lid member 9 also stands up with a substantially upright or slightly inclined angle, the same locking means as in the second to fourth embodiments including the guide wire 12 is provided. In the present invention, the following will explain that there is a configuration in which the lid member 9 to be stored can be supported in an upright state inside the storage space S without providing the back plate 10. Note that when the lid member 9 is not stored, the back plate 10 also serves as a decorative plate that covers the inside of the storage space S.

[0072] As the holding means for holding the lid member 9 removed from the sink 4 in an upright posture within the storage space S, instead of the holding means by the locking means such as the back plate 10 and the guide wire 12 described above, or in a form used in combination with the locking means, it may be held by any of a linear body, a rod-shaped body, or a belt-shaped body disposed in the storage space S so as to face the front surface, the rear surface, or both the front and rear surfaces of the upper half side of the lid member 9 stored in the storage space S.

[0073] In the above-described Embodiments 1 to 4, the locking means for detachably supporting the lid member 9 to be stored in the storage space S has a configuration as simple as possible from the viewpoints of safety and cost. However, in the present invention, by the locking means having a locking structure using a latch mechanism and a spring as appropriate, when the lid member 9 to be stored is pushed in, the lid member 9 is automatically locked, and a structure capable of supporting the lid member 9 in an upright posture can be achieved.

[0074] The present invention is not limited to the application to the above-described embodiments, and it goes without saying that various modifications are possible within the scope of the technical idea described in the claims, the specification, and the drawings.

Explanation of Reference Numerals

[0075] 1 Laboratory bench 2 Core part 2A Top surface of the core part 2B Outer peripheral surface of the core part 2C Side wall of the core part 2D Bottom plate of the core part 2a Opening of the core part 4 Sink 9 Lid member 9a Decorative surface of the lid member 10 Back plate 12 Guide wire (locking means) Retention portion of the guide wire 12a Positioning block 14 Concave retention portion (locking means) 15 Stopper plate (locking means) 18 Locking block (locking means) 20 Storage space S Offset amount ε of the locking block 20 Tilt angle α of the back plate 10

Claims

1. In a laboratory bench having a core part with a sink provided thereon and a top plate provided on the core part, a lid member that detachably covers the upper surface opening of the sink; an opening formed on the outer peripheral surface of the core part below the sink and having at least the width of the lid member; a storage space formed inside the core for storing the lid member removed from the sink through the opening; holding means for supporting the lid member removed from the sink in an upright posture in the storage space; characterized by comprising: wherein the holding means is either one or both of a back plate disposed inside the storage space so that at least a part of the lid member stored in the storage space abuts thereon, or locking means disposed inside the storage space so as to detachably lock the upper part of the lid member to be stored. A laboratory bench characterized by the above.

2. In a laboratory bench having a core part with a sink provided thereon and a top plate provided on the core part, a lid member that detachably covers the upper surface opening of the sink; an opening formed on the outer peripheral surface of the core part below the sink and having at least the width of the lid member; a storage space formed inside the core for storing the lid member removed from the sink through the opening; characterized by comprising: further comprising a positioning block provided at the bottom of the storage space for engaging with the lower end of the lid member removed from the sink and stored in the storage space; wherein the lid member stored in the storage space is supported in an inclined posture by the positioning block. A laboratory bench characterized by the above.

3. The locking means is composed of a guide wire having both left and right ends rotatably supported on both side walls of the storage space near the opening and having a pressing portion protruding and bending by a predetermined length from both left and right ends. The upper part of the front surface of the lid member is locked over substantially the entire width by the pressing portion of the guide wire. The laboratory bench according to Claim 1.

4. The locking means is composed of a substantially concave pressing portion in a front view that has both left and right ends rotatably supported on the back plate and protrudes and bends by a predetermined length from both left and right ends. A part of the upper edge of the front surface of the lid member stored by the pressing portion is locked. The laboratory bench according to Claim 1.

5. The locking means is composed of a stopper plate rotatably supported around the upper end side in the longitudinal direction on the upper part of the inner surface of the opening. A part of the upper edge of the front surface of the lid member stored by the stopper plate is locked. The laboratory bench according to Claim 1.

6. The locking means is a pair of locking blocks supported on both sides in the width direction of the periphery of the opening, with the upper part rotatably supported in the left-right direction. The rotation center is located on the lower end side of the locking block and is offset with respect to the center of the left-right width. The locking means is composed of a pair of locking blocks, and the upper parts of both end edges in the width direction of the front surface of the lid member housed by the locking blocks are locked. The experimental table according to claim 1.

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