JP2013094267A - Desk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent rear part legs from colliding with each other to be scratched when arranged back to back when each leg strut is an aluminum product.SOLUTION: An leg 2 supporting a top plate has a gate shape having front and back leg struts 3 and an upper frame 4 connecting them. The leg strut 3 and the upper frame 4 are connected by an L-shaped joint member 41 having a horizontal part and a vertical part, and the joint member 41 has a flange 44 interposed between junction faces of the leg strut 3 and the upper frame 4. An upper end part of a rear face plate 3a configuring the rear part leg strut 3 is formed with a cut-opened part having an upward opening, the cut-opened part is closed from above by the flange 44 of the joint member 41 to form a square engagement hole 72, and a resinous buffer material 73 is fitted and mounted in the engagement hole 72. By the presence of the buffer material 73, it is prevented that both the rear part legs 3 collide with each other to prevent the scratching.

Description

  The present invention relates to a desk having a structure in which a top plate is supported by metal legs.

  The desk has a top plate as an essential element, and the top plate is supported by the left and right legs. The top plate is often rectangular in plan view. The shape of the legs is various, and as an example, Patent Document 1 discloses a portal type in which front and rear leg posts are connected by an upper frame. In this Patent Document 1, the rear surface of the leg is located behind the rear surface of the top plate, and a horizontally long beam is connected between the rear ends of the left and right legs. The product can be attached.

JP 2002-291537 A

  If the rear ends of the left and right legs are exposed behind the top plate as in Patent Document 1, for example, even if the back of the desk is placed against the wall or the desks are placed back to back, wiring is done behind the top plate. There is an advantage that a space can be made available, and a beam can be arranged at the exposed portions of the left and right legs to support the back panel.

  However, on the other hand, it is easy for objects to hit the back of the leg, and there is a problem that the back of the leg is easily damaged. In particular, when the desks are arranged back to back, the desk and the back of the leg of the desk are abutted, but at this time, the legs are violently colliding with each other and easily damaged. The legs are often made of extruded aluminum or die-casted for the purpose of improving the appearance and improving workability, but since aluminum is softer and more easily scratched than steel, the problem of scratches is noticeable in this case. It can be said.

  The present invention has been made to improve the current situation.

  In order to improve the desk, the inventors of the present invention created the invention of each claim. In the first aspect of the present invention, the metal legs that support the top plate are arranged below the left and right side portions of the top plate that is square in plan view so that the rear end protrudes behind the rear surface of the top plate. In the configuration, a cushioning material protruding from the rear surface is provided on the rear surface of the leg.

  The invention of claim 2 is a preferred embodiment of claim 1 in which the legs have hollow front and rear leg columns and a hollow upper frame disposed between the upper ends of the front and rear leg columns. The front and rear leg struts and the upper frame are connected by a joint member having a horizontal portion that fits into the upper frame and a vertical portion that fits into the leg strut.

  The joint member has a flange that is located between the upper end of the leg column and the front and rear ends of the upper frame and is exposed to the outside, and the upper end of the rear plate in the rear leg column and the flange of the joint member are An engagement hole that opens backward is formed by notching one or both of the rear plate and the flange at the contacted portion, and a resin cushioning material is fitted into the engagement hole. .

  The invention of claim 3 is a preferred embodiment of claim 1, wherein the leg support and the upper frame are aluminum extruded products, while the joint member is an aluminum die-cast product.

  In the present invention, due to the presence of the cushioning material, for example, even when the rear surfaces of the leg struts hit each other when arranging the desks back to back, the cushioning material hits first, so that the rear surfaces of the leg struts do not collide strongly and get damaged. it can. Therefore, according to the present invention, it is possible to prevent or remarkably prevent the leg from being damaged, while the desk is designed such that the rear end of the leg protrudes from the back of the top board and the wiring and the back panel are supported.

  The cushioning material can be attached by, for example, adhesion. However, in this case, there is a problem that the cushioning material is easily detached when hit. On the other hand, when the method of fitting the cushioning material into the engagement hole as in claim 2 is adopted, it is excellent in reliability since it can be prevented from falling off accurately. Since the engagement hole is formed by cutting out a part of the leg column or a part of the joint member, for example, a square engagement hole can be easily formed. In addition, when the joint member is removed or displaced from the leg support, the engagement hole expands in an open state, so that the cushioning material can be easily replaced.

  If an extruded product of aluminum is adopted as the leg post as in claim 3, the stability of quality such as strength is excellent and the appearance is good. Moreover, since the material can be processed into leg posts by cutting the material to the required length, the cost of the mold can also be suppressed. Further, since the engagement hole is located at the end of the leg column, the notch can be easily processed. On the other hand, when a die-cast product is employed as the joint member, a portion that functions as an engagement hole can be formed, so that the post-processing work can be eliminated.

It is a figure which shows the external appearance of the desk which concerns on embodiment, (A) is a perspective view from a front direction, (B) is a separate perspective view. (B) is the perspective view seen from back, (B) is the isolation | separation perspective view from back. (A) is the perspective view which looked at the desk from the inside, (B) is a side view, (C) is the perspective view which looked at the cable receiver from the downward direction. (A) and (B) are the exploded perspective views of the structural member of a leg and a rear beam, (C) is CC sectional view taken on the line of (A). (A) (B) is the isolation | separation perspective view of the structural member of a leg. (A) and (B) are partial exploded perspective views of a leg and a rear beam. (A) (B) (C) is a figure which shows the connection structure of a rear beam. It is the external view of the back corner part of a desk, (A) is the perspective view seen from the inside, (B) is the perspective view seen from the back, (C) is the principal part side view in the state which arranged the desk back to back. is there. (A) is an exploded perspective view of an essential part, (B) is an exploded perspective view of an essential part in a state where the upper frame is shifted upward, and (C) is a sectional view taken along the line CC in (A). It is a reference separation side view in the case of using an L-shaped leg.

  Next, an embodiment of the present invention will be described with reference to the drawings. In the following description, the words “front and rear” and “left and right” are used to specify the direction, which is based on the direction of the person who uses the desk in a normal posture. Therefore, the frontage direction of the desk is the left-right direction, and the depth direction is the front-rear direction. For the front and back, the side closer to the user is used as the front, and the back part far from the user is used as the back.

(1). Outline of the desk First, the outline of the desk will be described mainly with reference to FIGS. As shown in FIGS. 1-3, a desk has the top plate 1 of a planar view rectangle (rectangle), and the left and right legs 2 which support this in the left and right both sides. The top plate 1 is made of wood, but a steel plate can also be used. The leg 2 has a gate shape in which rod-shaped front and rear leg supports 3 and 3 'are connected to each other by a horizontal upper frame 4 at the upper end, and a pair of front and rear spacers 5 are fixed to the upper frame 4 with bolts. The top plate 2 is fixed to 5 with bolts. Therefore, there is an interval between the top plate 2 and the upper frame 4 so that cables can be inserted.

  Details of the spacer 5 are shown in FIG. The spacer 5 has a reverse L shape when viewed from the front so as to overlap the upper surface and the inner surface of the upper frame 4 and has a symmetrical shape. And, as indicated by arrows 5a and 5b, it is fixed to the upper frame 4 with bolts inserted from above and inside, and as indicated by arrow 5c, it is inserted from below into the portion protruding to the inside of the upper frame 4. It is fixed to the top plate 1 with bolts. In addition, the spacer 5 is provided with an upward positioning projection 5 d that fits into a hole provided in the top plate 1 and a downward positioning projection 5 e that fits into a hole provided in the upper frame 4. For this reason, the top plate 1 and the leg 2 are positioned accurately via the spacer 5.

  The leg posts 3 and 3 'and the upper frame 4 are hollow and have a substantially square shape, and are integrally connected via a connecting bracket having an L shape in side view and fitted into both. Further, a rear beam 6 is disposed between the upper portions of the rear leg struts 3 in the left and right legs 2, and the rear beam 6 and the left and right rear leg struts 3 are fixed with bolts. In this case, the rear end of the top plate 1 is located slightly in front of the rear end of the leg 2 (the rear surface of the rear leg column 3), and the rear beam 6 has a half of the front and rear width dimension in plan view. It sticks out behind. Details of the structure of the leg 2 and the rear beam 6 and the connection structure between them will be described later.

  A cut-out portion 7 having a rectangular shape in plan view opened rearward is formed in the left and right intermediate portions of the rear end portion of the top plate 1, and the cut-out portion 7 forms a wiring passage. A cover 8 is attached to the slit portion 7 to close it. The cover 8 is detachable. The rear part of the top plate 2 may be weakened due to the formation of the slit 7. Therefore, the left and right sides of the top plate 2 sandwiching the slit 7 are supported from below by a top plate support bracket 9 attached to the rear beam 6.

  A cable receiver 10 and a connector support 11 positioned above the cable receiver 10 are attached to the lower part of the rear beam 6. The cable receiver 10 is attached to the rear beam 6 so as to be slidable left and right. It is also possible to attach a plurality of cable receivers 10 to the rear beam 6.

  Note that the cover 8 is formed in a shallow tray shape, and is supported on the inner periphery of the slit portion 7 so as to be detachable and changeable in the front-rear position by a fixed cover receiver 13. In FIG. 2, the cover 8 is arranged with its bottom up, but it can also be arranged with the cover open upward. In any case, a horizontally long space in which the cable can be drawn is vacant between the inner bottom portion of the cover receiver 13 and the front end of the cover 8.

(2) Details of Leg and Rear Beam Next, the relationship between the structure of the rear beam 6 and the leg 2 and the connection structure between them will be described with reference to FIG.

  The rear beam 6 is a processed sheet metal product made of a steel plate, and has, for example, a substrate 20 and a reinforcing plate 21 fixed to the front surface thereof as shown in FIG. The upper and lower folded portions 20a and 20b of the substrate 20 are formed in a bag shape (hollow shape). On the other hand, the reinforcing plate 21 has a forward projecting portion 21 a, and the rear beam 6 has a hollow portion surrounded by the substrate 20 and the reinforcing plate 21, and sandwiches the forward projecting portion 21 a of the reinforcing plate 21. An upper engagement groove 22 and a lower engagement groove 23 are formed on both upper and lower sides. The above-described top plate support bracket 9 and outlet support 11 are attached to the upper engagement groove 22, and the cable receiver 10 is attached to the lower engagement groove 23.

  As shown in FIGS. 4 and 5, the leg posts 3, 3 ′ and the upper frame 4 constituting the leg 2 are extruded products and are generally hollow rectangular, and have a horizontal portion 41 a and a vertical portion 41 b. L-shaped joint members 41 are connected to each other. The joint surfaces 42, 43 between the leg posts 3, 3 ′ and the upper frame 4 are cut obliquely in side view, and the joint member 41 has joint surfaces 42, 43 between the leg posts 3, 3 ′ and the upper frame 4. A flange 44 sandwiched between 43 is provided. The joint member 41 uses an aluminum die cast product, but a resin molded product or a zinc die cast product can also be used.

  The inside of the leg columns 3 and 3 ′ is divided into an outer space 46 and an inner space 47 by an intermediate partition 45, and a center groove 48 that is nearly circular in plan view is formed in the intermediate partition 45. The center groove 48 opens into the inner space 47. Also, two left and right end grooves 49 are formed in a portion of the inner space 47 opposite to the intermediate partition 45. The end groove 49 also has a shape close to a circle and opens into the inner space 47.

  On the other hand, the vertical portion 4b of the joint member 41 includes an outer foot portion 50 that fits in the outer space 46 of the leg struts 3 and 3 'and an inner foot portion 51 that fits in the inner space 47 of the leg struts 3 and 3'. In the inner foot 51, an end screw hole 52 communicating with the end groove 49 in plan view is open so as to open up and down, and an arrow 53 in FIGS. 9 (B) and 10 (B) is used. As shown, a screw inserted from above into the end screw hole 52 is screwed into the end groove 49.

  Further, a center screw hole 54 communicating with the center groove 46 of the leg struts 3, 3 ′ is opened at an upper portion in a portion between the outer foot portion 50 and the inner foot portion 51 in the corner portion of the joint member 41. As shown by an arrow 55, a screw inserted from above into the center screw hole 54 is screwed into the center groove 49.

  On the other hand, as shown in FIG. 4C, the upper frame 4 has a substantially square shape with no partition inside, and therefore the horizontal portion 41a of the joint member 41 also has a simple prismatic shape. Then, as indicated by arrows 56 in FIG. 5, screws inserted from below into the upper frame 4 are screwed into connecting screw holes 57 provided at both ends of the front and rear sides. Further, the horizontal portion 41 a of the joint member 41 is provided with spacer screw holes 58 and 59 into which screws for attaching the spacer 5 are screwed. Therefore, the spacer 5, the upper frame 4, and the joint member 41 are integrally fastened with screws. For this reason, it is excellent in strength.

  Of the screw holes 58 and 59 for spacers, a pair of upper and lower threaded holes 58 into which screws are screwed from above are formed on the left and right, and only one of the left and right pairs is used for actual fastening. This is because one type of joint member 41 can be used for both the left and right leg columns 3 and 3 'in consideration of the upper portion of the spacer 5 being inward. Further, the front and rear joint members 41 are the same, and the front and rear leg columns 3 and 3 'are also manufactured in the same shape. That is, in the present embodiment, the front and rear, left and right leg columns 3, 3 'and the joint member 41 have the same shape, and the spacer 5 has the same shape. The effort of material management is reduced and the cost is reduced.

  As shown in FIG. 6, a connection block 61 for connecting the beam 6 is fixed with a plurality of upper and lower (two) bolts 62 at the upper end portion and the rear portion of the inner side surface of the rear leg column 3. Yes. The bolt 62 penetrates the inner plate of the rear leg column 3, and a screw hole 63 into which the bolt 62 is screwed is formed in the outer leg portion 50 constituting the vertical portion 41 b of the joint member 41 so as to open to the left and right. ing. Thus, since the connection block 61, the rear leg column 3, and the joint member 41 are fastened together with the bolts 62, the leg 2 has a robust structure. The rear surface of the rear beam 6 is positioned slightly in front of the rear surface of the rear leg column 3. Therefore, even if the desks are arranged back to back, the rear beams 6 do not hit each other.

  The connecting block 61 is provided with a plurality of upper and lower (two) positioning pins 64 protruding toward the rear leg column 3, while the inner plate of the rear leg column 3 and the connecting block 61 are positioned. A positioning hole 65 into which the pin 64 is fitted is provided, so that the connecting block 61, the rear leg column 3 and the joint member 41 are accurately positioned. (As a result, the rear leg column 3 and the rear beam 6 are also accurately positioned.)

  The connection block 61 is formed in a rectangular parallelepiped shape that is vertically long when viewed from the side so as to fit into a hollow portion between the substrate 20 and the reinforcing plate 21 in the rear beam 6. The outer end surface of the connecting block 61 is formed as an inclined end surface 61a that goes backward as it is away from the rear leg support 3 in plan view, while the connecting block 61 is disposed on the front surface of the end of the substrate 20 constituting the rear beam 6. A joint plate 66 having a crank shape in plan view that overlaps the front surface and the inclined end surface 61 a is fixed by welding, and the joint plate 66 is fastened to the connecting block 61 by a bolt 67.

  More precisely, the joint plate 66 includes a front plate portion 66a that overlaps the front surface of the connecting block 61, an inclined portion 66b that overlaps the inclined end surface 61a of the connecting block 61, and a rear plate that is welded to the substrate 20 of the rear beam 6. The inclined portion 66b is fastened to the connection block 61 with two upper and lower bolts 67. Accordingly, the bolt 67 for fastening the inclined portion 66b is inclined with respect to the longitudinal direction of the rear beam 6 in plan view (the inclination angle is set to about 45 °).

  The joint plate 66 is set to have a width dimension that extends across the entire top and bottom of the front surface of the substrate 20 in the rear beam 6, and the joint plate 66 is also welded to the end of the forward projecting portion 21 a of the reinforcing plate 21. Therefore, the joint plate 66 is sandwiched between the substrate 20 and the reinforcing plate 21. For this reason, the end of the rear beam 6 is reinforced by the joint plate 66, and as a result, high rigidity is exhibited.

  As shown in FIG. 6A, in order to allow the joint plate 66 to enter the rear beam 6, the end portion of the reinforcing plate 21 and the folded portions 20a, 20b of the substrate 20 are partially cut away. (This notch is indicated by reference numeral 68).

  In addition, when arrange | positioning a desk back to back, the back panel P shown in FIG. 2 is located between the front-and-back top boards 1. FIG. That is, one back panel P is shared by the front and rear desks. Further, the back panel P is attached to the rear beam 6 via a sheet metal panel support 70 shown in FIG. The panel support column 70 includes a lower mounting portion 70a that overlaps the end portion of the rear beam 6 from the front side, an upper mounting portion 70b that is fitted from below into a substantially front and rear intermediate portion of the back panel P, and a relay portion 70c that connects the two. The lower mounting portion 70a is fastened to the connecting block 61 with a bolt 69. Therefore, the connection block 61 is formed with a screw hole 69a that opens in the front-rear direction.

(3) Cushioning material As shown in FIGS. 8B and 8C, left and right laterally long engagement holes 72 are formed in the upper end portion of the rear surface of the leg 2. The left and right laterally long cushioning material 73 is mounted. As shown in FIG. 9 (B), the engagement hole 72 forms a slit portion having an upward opening at the upper end of the rear plate 3 a constituting the rear leg column 3, and closes it with the flange 44 of the joint member 41 from above. Thus, the hole has a continuous inner periphery. The flange 44 of the joint member 41 has an upper horizontal portion 44 a and an inclined portion 44 b, and the upper inner surface of the engagement hole 72 is configured by the upper horizontal portion 44 a of the flange 44.

  The cushioning material 73 protrudes rearward from the rear surface of the front plate 3a in the rear leg column 3 by a slight dimension. Further, left and right end portions of the cushioning material 73 are provided with left and right outward hook-shaped engagement claws 74 protruding rearward in a plan view, and the hook portions of the engagement claws 74 are the front plate 3 a of the rear leg column 3. Is caught from behind. The buffer material 73 can be attached by a one-touch operation of pushing the engaging claw 74 into the engaging hole 72. When the joint member 41 is shifted upward, the cushioning material 73 can be easily removed. When replacing the cushioning material 73, the cushioning material 73 that was originally mounted is not used. Therefore, the cushioning material 73 that has been mounted is deformed and broken using pliers or the like and then forcibly removed to replace the cushioning material 73. It ’s good to fit it.

  In order to allow the engaging claws 74 to be fitted, a pair of left and right recesses 75 are formed immediately below the flange portion 44 of the joint member 41. The cushioning material 73 has a plurality of left and right (two) foot pieces 76 protruding rearward, and the foot pieces 76 are brought into contact with the rear surface of the joint member 41. The portion of the cushioning material 73 excluding the portion of the engaging claw 74 may be formed in a simple plate shape, and the entire portion may be brought into contact with the rear surface of the joint member 41. Providing the piece 76 has an advantage that the cushioning property can be improved.

  When the desks are arranged back to back, after positioning one desk, the other desks are shifted from the left and right to bring the backs into close contact with each other. Therefore, in the operation | work which arrange | positions a desk back-to-back, the rear leg support | pillars 3 do not collide strongly, For this reason, it can prevent the rear leg support | pillar 3 being damaged.

  When the cushioning material 73 is formed in a horizontally long rectangular shape as in the embodiment, the appearance is refreshing and there is an advantage that a high cushioning function can be maintained without increasing the area. That is, when the desks are arranged side by side, the back of the desk to be moved and the back of the stationary desk may not be parallel in plan view, and therefore one of the left and right rear leg struts 3 may hit first. However, if the cushioning material 73 is set to be horizontally long as in the present embodiment, even if one of the rear leg struts 3 hits first, the cushioning material 73 can be applied to each other, which is high. A buffer function can be secured.

  Now, since the leg struts 3 and 3 'are formed by extrusion processing, it is very troublesome to form a rectangular shape such as a horizontally long shape by post-processing the engagement holes. In this respect, in the present embodiment, the engagement hole 72 is configured by closing the cut-out portion of the leg struts 3, 3 ′ from above with the flange 44 of the joint member 41, so that the processing is simple. That is, even if the cut-off portions of the leg columns 3 and 3 'are rectangular, they can be easily formed by, for example, milling, while the flange 44 of the joint member 41 is present from the beginning. It can be easily provided. Moreover, since the recessed part 75 for fitting the engaging claw 74 is shape | molded as a part of the joint member 41, the difficulty on a process does not exist also about this.

  As described above, in the present embodiment, the front and rear leg struts 3 and 3 'share the same shape, and therefore the cushioning material 73 is also attached to the front leg strut 3'. However, since the cushioning material 73 is thin and not so noticeable, the aesthetic appearance is not impaired.

(4). Supplement to the L-shaped leg as shown in FIG. In this case, the above-described joint member 41 is disposed at the rear part of the leg 2 'so that the rear beam 6 can be easily connected to the L-shaped leg 2'. That is, the joint member 41 is also used for the portal leg 2 and the L-shaped leg 2 '. When the L-shaped leg 2 'is used, the spacer 5 is not used, and the top plate 1 is overlapped with the upper surface of the leg 2' and is held so as not to be detached by a connection fitting (not shown). A step 78 is formed at the rear of the leg 2 'for wiring.

  Conventionally, the gate-shaped leg 2 and the L-shaped leg 2 'are designed independently of each other and have a unique structure. However, when the rear beam 6 is connected, the rear beam 6 is also unique. Therefore, there is a problem that the manufacturing cost increases as a whole of the desk group. In this embodiment, this problem is also considered, and the joint member 41 is fixed to a frame material built in the L-shaped leg 2 ', and a steel plate outer surface plate is fixed to the frame material by spot welding. doing. Although it is possible to provide the cushioning material 73 for the L-shaped leg 2 'as well, if the outer surface is made of a steel plate, the problem of scratches due to collision does not appear so much. In this embodiment, the L-shaped leg 2' No buffer material 73 is provided at 2 '.

(5). Others The present invention can be embodied in various ways other than the above embodiment. For example, the legs can adopt various forms. The top plate having a square shape means that it has a straight rear surface and two side surfaces intersecting with this in a plan view and has a corner portion. included.

  The shape and arrangement position of the cushioning material can be arbitrarily set. For example, it is also possible to form it in a disk shape and arrange it at a plurality of locations (for example, the upper end and the lower end on the back of the leg). Various materials for the cushioning material can be selected as required. It is also possible to use rubber such as elastomer. The leg struts can be aluminum die-cast products.

  The present invention can actually be embodied on a desk. Therefore, it can be used industrially.

DESCRIPTION OF SYMBOLS 1 Top plate 2 Leg 3 Rear leg support | pillar 3 'Front leg support | pillar 6 Rear beam 41 Connecting member 44 Flange of a connecting member 61 Connecting block 72 Engagement hole 73 Buffer material 74 Engaging claw 75 Recessed part 76 Foot piece

Claims (3)

Below the left and right side portions of the top plate having a rectangular shape in plan view, a metal leg that supports the top plate is arranged so that the rear end protrudes behind the rear surface of the top plate,
The rear surface of the leg is provided with a cushioning material protruding from the rear surface.
desk. The legs are in the form of a side view having a hollow front and rear leg struts and a hollow upper frame disposed between the upper ends of the front and rear leg struts. It is connected by a joint member having a horizontal part that fits into the frame and a vertical part that fits into the leg column, and the joint member is located between the upper end of the leg column and the front and rear ends of the upper frame. It has a flange that is exposed to the outside, and at the part where the upper end of the rear plate on the rear leg column and the flange of the joint member abut, either or both of the rear plate and the flange are notched. An engagement hole opened backward is formed, and a resin cushioning material is fitted in this engagement hole.
The desk according to claim 1. While the leg strut and the upper frame are extruded products of aluminum, the joint member is an aluminum die-cast product,
The desk according to claim 2.

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