JP2008301974A - Leg device for desk - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a leg device for a desk, which is capable of easily stabilizing leg parts without adding separate members even if expanding the depth of a top board in a desk such as a study desk facilitating expansion/contraction of an effective depth of a top board despite of having the top board fixed to the leg parts and having stable balance of the center of gravity. <P>SOLUTION: The desk is so formed that both sides of the top board 1 are supported by leg bodies 2, an expansion top board 3 is provided at the top board or the leg bodies directly or indirectly via other members, and the expansion top board can take a horizontal attitude where the expansion top board is continued to the rear end of the top board and its upper face is flush with the top board, and a storage attitude where the expansion top board does not project rearward from the rear end of the top board, wherein front side ground contact members 6 are attached to the front parts at the lower ends of the leg bodies, and rear side grounding members 7 are detachably attached to the rear parts so as to change their attachment positions to the front/rear. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a desk leg device, and more particularly to a leg device applied to a leg portion of a desk such as a learning desk capable of adjusting the depth width of a top board.

  Conventionally, there is a requirement for a tabletop with a wide depth, or conversely a requirement for a tabletop with a narrow depth, depending on the purpose of use and preference. In order to provide a learning desk suitable for many users, a learning desk capable of adjusting the depth of the top board according to the situation is desired.

  Patent Document 1 discloses an office table including a support portion extending forward from the upper and lower portions of a vertical portion, a U-shaped leg member having a leg portion for grounding, and a top plate attached to the upper end of the support portion. A structure is described in which a support arm is connected to the upper end portion of the vertical portion to attach an auxiliary top plate at the same height as the top plate, and an auxiliary leg piece is connected to the rear end of the leg portion.

  Further, in Patent Document 2, a top plate provided horizontally between both leg plates is formed so as to be able to be pulled forward by a predetermined stroke, an auxiliary plate is disposed at the rear end of the top plate, It is formed so that it can be selected between a horizontal posture that forms the same plane as the top plate and a vertical posture that is buried below the rear part between both leg plates, and the front and rear width of the auxiliary plate is substantially the same as the stroke of the top plate A desk formed to dimensions is disclosed.

However, in the case of Patent Document 1, the auxiliary top plate can be attached to the rear part of the top plate to extend the depth of the top plate, and the instability caused by mounting the auxiliary top plate so as to protrude rearward from the leg member can be reduced. This problem is solved by connecting the auxiliary leg piece to the rear end of the unit, but the support arm for attaching the auxiliary top plate is bolted to the connecting beam connecting both leg members, and the auxiliary leg piece is connected to the leg part. This requires not only the troublesome task of bolting with the connecting plate that straddles the joints of the joint, but also the auxiliary top plate, support arm, auxiliary leg piece and connecting plate when not in use. There is a problem in that it must be stored in a place, and parts management takes time and cost. In Patent Document 2, when extending the depth of the desk, the top plate is pulled forward with respect to the leg plate, so that the front part of the top plate protrudes from the leg plate, and the center of gravity becomes a forehead and is unstable. is there. From the viewpoint of stability, it is desirable that the top plate is fixed to the leg portion.
Japanese Utility Model Publication No. 63-138141 Japanese Utility Model Publication No. 60-191225

  Therefore, in view of the above-described situation, the present invention intends to solve the problem that the top plate is fixed to the leg and the balance of the center of gravity is stable, but the effective depth width of the top plate is reduced. Provide a desk leg device that can easily stabilize the legs without adding additional members even when the depth of the top plate is expanded in a desk such as a learning desk that can be easily expanded and reduced There is in point to do.

In order to solve the above-mentioned problems, the present invention supports both sides of the top plate with legs, and provides the top plate or the leg with an extended top plate directly or indirectly through another member, The extended top plate can take a horizontal posture in which the top plate and the top plate are flush with the rear end of the top plate, and a retracted posture that does not protrude rearward from the rear end of the top plate. A desk leg device, wherein a front grounding member is attached to the front part of the lower end of the leg body, and the rear grounding member is detachably attached to the rear part so that the front and rear mounting positions can be changed. (Claim 1).

  Further, when the rear grounding member is attached to the front of the leg, a normal leg mode in which the rear end of the rear grounding member does not protrude rearward from the rear end of the leg, and the rear side When the grounding member is attached to the rear of the leg, the rear end of the rear grounding member can take the form of an extended leg that protrudes rearward from the rear end of the leg. Item 2).

  Here, the front side grounding member and the rear side grounding member are skeletons having substantially the same cross section, and when the rear side grounding member is mounted forward with respect to the leg, the front side grounding member is continuous with the front side grounding member. It is preferable that an adjuster is provided in each of the recesses formed on the lower surface of the front end portion of the ground member and the lower surface of the rear end portion of the rear ground member.

  In addition, a plurality of screw holes are formed at regular intervals in the front-rear direction on the lower end surface of the rear part of the leg body, and mounting holes are formed through the rear grounding member at the same interval as the screw holes. More preferably, a plurality of bolts are screwed into the screw holes from the attachment holes, and the rear grounding member is attached to the leg.

  Since the desk leg device of the invention according to claim 1 as described above is a rigid learning desk in which both sides of the top board are supported by legs, the balance of the center of gravity is always stable, and the top board or the leg A horizontal posture in which the extended top plate is provided directly on the body or indirectly through another member, the extended top plate is continuous with the rear end of the top plate and the top plate is flush with the top surface; Since it is possible to take a retracted posture that does not protrude backward from the rear end of the top plate, when the extended top plate is in a horizontal posture, the top plate and the extended top plate are integrated into a desk with a wide depth. Even when the depth width is expanded rearward by the extended top plate, the rear grounding member can be stably supported by being shifted rearward with respect to the leg. That is, even if a large load that cannot be assumed in normal use is applied to the extended top plate, the lower part is supported by the rear grounding member, so that the front part of the desk does not rise and fall down. On the other hand, when the extended top plate is in the retracted position, the extended top plate does not protrude rearward from the rear end of the top plate, and if the rear grounding member is attached to the front side with respect to the leg, the rear of the leg Therefore, the rear end of the desk can be placed along the wall surface or the front of the bookcase.

  According to claim 2, when the rear grounding member is attached to the front of the leg, the rear leg of the rear grounding member does not protrude rearward from the rear end of the leg. Therefore, the rear end of the desk can be placed in close contact with the wall surface or the front surface of the bookcase. In addition, when the rear grounding member is attached to the rear of the leg, the rear end of the rear grounding member has an extended leg shape protruding rearward from the rear end of the leg. Even when an extended top plate is provided behind the plate, it can be stably supported.

  According to a third aspect of the present invention, the front ground member and the rear ground member are substantially identical in cross section, and are continuous with the front ground member when the rear ground member is attached to the front of the leg. Therefore, the appearance is excellent, and adjusters are provided in the formed recesses on the lower surface of the front end portion of the front side grounding member and the lower surface of the rear end portion of the rear side grounding member. It can absorb the land.

  According to claim 4, a plurality of screw holes are formed at regular intervals in the front-rear direction on the lower end surface of the rear part of the leg body, and mounting holes are formed at the same interval as the screw holes on the rear grounding member. It is formed by penetrating vertically, and a plurality of bolts are screwed into the screw holes from the mounting holes, and the rear grounding member is attached to the leg, so that the rear grounding is made by an interval between the screw holes and the mounting holes. The rear protrusion length of the member can be adjusted in one step or multiple steps.

  Next, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings. 1 to 5 show a learning desk according to an embodiment to which the desk leg device of the present invention is applied, and FIGS. 6 to 11 show an embodiment in which a learning desk and a book shelf are used in combination. Learning desk, B is a bookshelf, 1 is a top plate, 2 is a leg, 3 is an extended top plate, 4 is a support arm, 5 is a recess, 6 is a front side grounding member, and 7 is a rear side grounding member.

  The learning desk A according to the present invention supports both sides of the top board 1 with the legs 2 and 2, and sets the rear ends of both legs 2 so as not to protrude rearward from the rear end of the top board 1, An extension top plate 3 is provided on the top plate 1 or the leg body 2 directly or indirectly through another member, and the extension top plate 3 is connected to the top plate 1 continuously to the rear end of the top plate 1. It is possible to take a horizontal posture in which the upper surface is flush and a retracted posture that does not protrude backward from the rear end of the top plate 1. The front grounding member 6 is attached to the front part of the lower end of the leg 2, and the rear grounding member 7 is detachably attached to the rear part so that the front and rear attachment positions can be changed. Here, the extended top plate 3 has a top plate extended specification in which the extended top plate 3 is arranged in a horizontal posture to the rear of the top plate 1, and the rear grounding member 7 is shifted and rearranged so as to protrude rearward, thereby stably supporting. It is characterized by being able to.

  Here, as shown in FIGS. 4 and 5, the learning desk A is provided with the extended top plate 3 so as to be pivotable up and down on both legs 2 and 2 via support arms 4 and 4. A recessed portion 5 or a recessed step portion for accommodating the extended top plate 3 in a retracted posture substantially perpendicular to the rear portion of the body 2 is provided. Further, elongated holes 9 parallel to the upper surface of the extended top plate 3 are formed in the base end side protruding portions 8 and 8 of the support arms 4 and 4 fixed in parallel to the depth direction on both sides of the lower surface of the extended top plate 3. And forming a support hole 10 penetrating up and down from the long hole 9 toward the extended top plate 3, and forming a support hole 11 penetrating left and right in the support arm 4 below the extended top plate 3. The support shaft 12 passed through the long hole 9 is fixed to the inner surface side of the leg 2 so as to be vertically rotatable, and the extension screw 3 is passed through the support hole 10 in a horizontal posture. Are screwed into the screw holes 14 on the lower surface of the top plate 1, and the fixing screws 13 passed through the support holes 11 are screwed into the screw holes 15 on the inner surface of the leg plate 2 with the extended top plate 3 in the retracted position. Hold posture.

  Further, projecting pieces 16, 16 project from the lower surface to the front side at both side portions of the extended top plate 3, and receiving brackets 17 for fitting the projecting pieces 16 into the rear end edge of the lower surface at both side portions of the top plate 1, 17, when the extended top plate 3 is in a horizontal posture, the protruding pieces 16, 16 are fitted into the receiving brackets 17, 17 to prevent the extended top plate 3 from being bent in the vertical direction. Yes.

  Next, details of each part of the learning desk A will be described. The learning desk A of this embodiment is made of wood, and each member is made of wood. The leg 2 forms a substantially rectangular frame in side view by connecting lateral members 19 between the upper and lower ends of the support legs 18, 18 arranged in the front-rear direction. A support frame 21 that holds the drawers 20,... So as to be able to be pulled out is fixed to the lower surface of the top plate 1, and the upper ends of the legs 2 are connected to the side surfaces of the support frame 21. In addition, the upper end of the leg 2 is firmly fixed to the lower surface of the top plate 1 with a pin dowel or the like. The connecting member 22 is connected between the lower rear ends of both legs 2 and 2 to increase the rigidity.

  Then, the base end side protruding portion 8 of the support arm 4 is pivotally supported by the support shaft 12 and the long hole 9 on the inner surface of the upper end portion of the rear support leg 18 of the leg 2. Further, at the upper end portion of the rear support leg 18, when the extended top plate 3 is in the retracted position, a screw hole 15 is embedded at a position corresponding to the support hole 11 formed in the support arm 4, and an omelet nut is embedded. Provided. Further, a recess 5 for accommodating the extension top plate 3 is formed in the upper rear end portion of the rear support leg 18 so that the extension top plate 3 is in the retracted position in which the extension top plate 3 is substantially vertical. It is set so as not to protrude rearward from the rear end of the top plate 1.

  The present invention will be described in more detail. As shown in FIGS. 1 to 3, when the rear grounding member 7 is attached to the front of the leg 2, the rear end of the rear grounding member 7 is arranged. However, when the rear grounding member 7 is attached rearward to the leg 2, the rear end of the rear grounding member 7 is It is possible to adopt an extended leg form protruding rearward from the rear end of the leg 2. In the extended leg mode, it is also preferable to fill a gap formed between the front grounding member 6 and the rear grounding member 7 with a separately prepared resin cap or a block member attached in advance to a desk.

  Specifically, the front side grounding member 6 and the rear side grounding member 7 are substantially the same frame having a quadrangular cross section, and when the rear side grounding member 7 is attached to the front side with respect to the leg 2, the front side An adjuster 24 is provided in the recess 23 formed on the lower surface of the front end portion of the front side grounding member 6 and the rear end portion of the rear side grounding member 7 so as to absorb the unevenness of the floor surface. I have to.

  The lower end of the leg 2 is a flat surface between the front and rear support legs 18, 18 and the lower lateral member 19, and the front grounding member 6 is fixed to the lower end surface of the front part of the leg 2. In addition, a plurality of screw holes 25,... Are formed at regular intervals in the front-rear direction on the lower end surface of the rear part, and mounting holes are formed at the same intervals as the spaces between the screw holes 25,. Are formed through the upper and lower sides, and a plurality of bolts 27 are screwed into the screw holes 25 through the mounting holes 26 to allow the rear grounding member 7 to be attached to and detached from the leg 2. It is installed. In this embodiment, the screw holes 25 are provided at four locations, the attachment holes 26 are provided at three locations, and the rear grounding member 7 is rearwardly changed by an interval between the adjacent screw holes 25, 25. To be able to.

  Next, the case where the learning desk A and the book shelf B are used in combination will be described with reference to FIGS. The book shelf B includes a lower book shelf B1 having a fixed shelf plate 28 having the same height as the top plate 1, and an upper book shelf B2 that is detachably mounted on the lower book shelf B1. . Accordingly, as shown in FIGS. 6 and 7, the front end of the fixed shelf 28 of the book shelf B can be joined to the rear end of the top shelf 1 in the retracted posture of the extended top 3.

  At the front lower edge of the fixed shelf 28 of the book shelf B, a single or a plurality of connecting fittings 29 provided with an engagement piece 30 facing upward at the tip are detachably attached with the engagement piece 30 protruding forward. In addition, in a state where the rear end portion of the top plate 1 and the front end portion of the fixed shelf plate 28 of the book shelf B are joined to at least the lower rear edge portion of the top plate 1 of the learning desk A, An engagement groove 31 for engaging the engagement piece 30 is formed.

  Further, as shown in FIGS. 8 and 9, when the extended top plate 3 is in a horizontal posture, the rear end portion of the extended top plate 3 and the front end portion of the fixed shelf plate 28 of the book shelf B are joined to be flush with each other. In this case, the engagement piece 30 of the connection fitting 29 is also engaged with the rear edge of the lower surface of the expansion top 3 so that the expansion top 3 and the fixed shelf 28 can be connected. An engaging groove 32 is formed. Further, in the state in which the side end of the top plate 1 and the front end of the fixed shelf 28 of the book shelf B are joined to the lower side edge of the top plate 1 of the learning desk A, An engaging groove 33 for engaging the combined piece 30 is formed.

  In the present embodiment, the connection brackets 29 and 29 can be attached to two locations near the both sides of the fixed shelf 28 of the book shelf B, and the top board 1 and the extension of the learning desk A are accordingly constructed. Engagement grooves 31 and 31 and engagement grooves 32 and 32 are formed near both sides of the rear edge of the top plate 3. On the other hand, an engaging groove 33 is formed at one side of the top of the top of the learning desk A at a substantially central portion of the width, and one side of the learning desk A is connected to the left and right sides of the front of the bookshelf B. In the case of being joined together, the one connection fitting 29 is used for connection.

  In addition, in order to form the engagement grooves 33, 33 on the lower side edge on both sides of the top plate 1 of the learning desk A, a notch 34 is formed in the center of the upper end of each leg 2, and the top The lower surface of the plate 1 is opened, and the engagement groove 33 is formed on the opened lower surface. In addition, since the notches 34 and 34 are formed on both sides of the top board 1, finger rests are formed on both sides of the learning desk A, so that the side edges of the top board 1 and the outer surface of the leg 2 are The learning desk A can be easily lifted even if there are few steps or no step.

  Further, as shown in FIG. 10, the learning desk A and the bookshelf B with the extended top 3 placed in a horizontal posture can be used independently of each other. It is also possible to use the book shelf B in close contact with one side. Here, it is arbitrary to use the learning desk A with the extended top 3 as the retracted posture as an independent desk with a narrow depth.

  Since the book shelf B is composed of a lower book shelf B1 having the fixed shelf plate 28 and an upper book shelf B2 that is detachably mounted on the lower book shelf B1, as shown in FIG. An upper writing shelf B2 separated from the book shelf B in a horizontal posture is placed on and fixed to the rear of the top 1 of the learning desk A and the upper surface of the expansion top 3, thereby constituting a learning desk having a desk shelf. be able to. Here, the lower book shelf B1 and the upper book shelf B2 are connected by using the side edges of the fixed shelf plate 28 and attracting them with the fixture 35. Even when the upper bookcase B2 is placed on the rear part of the learning desk A, the same fixing tool 35 can be used for connection.

  And as shown in FIG. 11, the said fixture 35 has the crank part 36 which can be latched to the edge part of the said top plate 1 or the fixed shelf 28 in the lower part, and is attached to the side plate 37 of the upper bookshelf B2 in the upper part. The fixing screw 39 is screwed into the provided screw hole 38, thereby having a tightening portion 40 for attracting and connecting. Cutout portions 41 and 41 are formed in the upper end portion of the rear support leg 18 constituting the leg body 2 and the rear upper end portion of the upper lateral member 19, and the tip of the crank portion 36 intruded from the cutout portion 41 is formed on the top plate. Lock to one side edge. Since the vertically elongated hole 42 formed in the tightening portion 40 is inclined so as to approach the side plate 37 as the hole edge becomes downward, the fixing screw 39 is inserted into the vertically elongated hole 42, When screwed into the screw hole 38 and tightened, the head of the fixing screw 39 presses the hole edge of the vertically long hole 42 to move the tightening part 40 upward, thereby attracting the side plate 37 to the top plate 1. is there.

  The reason why the two notches 41 and 41 are formed in the front and rear of the rear portion of the leg body 2 is that when the extended top plate 3 is placed in a horizontal posture and the upper bookcase B2 is placed and connected thereto, On the other hand, when the upper shelf B2 is placed and connected to the rear portion of the top plate 1 with the extended top plate 3 in the retracted posture, the front notch portion 41 is used for fixing. This is to enable connection with the tool 35.

1 shows a learning desk according to the present invention, in which (a) is a perspective view of a state in which an extended top is in a retracted position, and (b) is attached with a rear grounding member protruding rearward with the extended top in a horizontal position. It is a perspective view of a state. FIG. 2 also shows a learning desk according to the present invention, in which (a) is a side view of the extended top panel in the retracted position, and (b) is attached with the rear grounding member protruding rearward with the extended top panel in the horizontal position. FIG. It is an expanded longitudinal cross-sectional view of the principal part of this invention. It is a principal part longitudinal cross-sectional view of a state in which the extended top plate is in the retracted posture. It is a principal part longitudinal cross-sectional view of a state with an extended top plate in a horizontal posture. It is an explanatory perspective view in the case of using a learning desk and a bookshelf in a state where the extended top plate is in a retracted posture. It is a fragmentary longitudinal cross-sectional view of a state where the front of the bookshelf is connected to the rear part of the learning desk with the extended top plate in the retracted position. It is a perspective view which shows the state which connected the front surface of the bookshelf to the rear part of the learning desk of the state with an extended top plate in a horizontal posture, and was attached. It is a fragmentary longitudinal cross-sectional view which shows the state which connected the front of the bookshelf to the rear part of the learning desk of the state where the extended top plate is also in a horizontal posture. It is a perspective view which shows the use condition which mounted the upper bookcase which the expansion top plate isolate | separated in the rear part of the learning desk of a horizontal attitude | position. It is a principal part expanded vertical sectional view of the state which connected the learning desk and the upper bookshelf using the fixing tool.

Explanation of symbols

A study desk, B bookcase,
B1 lower bookcase, B2 upper bookcase,
1 top plate, 2 legs,
3 Extension top plate, 4 Support arm,
5 recess, 6 front grounding member,
7 rear side grounding member, 8 base end side protruding part,
9 long holes, 10 support holes,
11 support holes, 12 spindles,
13 fixing screws, 14 screw holes,
15 screw holes, 16 protrusions,
17 brackets, 18 support legs,
19 transverse members, 20 drawers,
21 support frame, 22 connecting member,
23 recesses, 24 adjusters,
25 screw holes, 26 mounting holes,
27 bolts, 28 fixed shelf boards,
29 connecting brackets, 30 engaging pieces,
31 engaging groove, 32 engaging groove,
33 engaging groove, 34 notch,
35 fixtures, 36 cranks,
37 side plates, 38 screw holes,
39 fixing screws, 40 tightening parts,
41 Notch, 42 Longitudinal hole.

Claims (4)

  The both sides of the top plate are supported by legs, and an extended top plate is provided on the top plate or the leg body directly or indirectly through another member, and the extended top plate is continuous with the rear end of the top plate. Then, in a desk capable of taking a horizontal posture in which the top surface is flush with the top plate and a retracted posture that does not protrude backward from the rear end of the top plate, A desk leg device, wherein a front grounding member is attached to the front part and a rear grounding member is detachably attached to the rear part so that the front and rear mounting positions can be changed.   When the rear grounding member is attached to the front of the leg, a normal leg form in which the rear end of the rear grounding member does not protrude rearward from the rear end of the leg, and the rear grounding member 2. An extension leg form in which a rear end of the rear grounding member protrudes rearward from a rear end of the leg when the rear is attached to the rear of the leg. Desk leg equipment.   The front side grounding member and the rear side grounding member are substantially identical in cross section, and when the rear side grounding member is attached to the front of the leg, the front side grounding member is continuous with the front side grounding member. The desk leg device according to claim 1 or 2, wherein an adjuster is provided in each of the recessed portions formed on the lower surface of the front end portion and the lower surface of the rear end portion of the rear grounding member.   A plurality of screw holes are formed at regular intervals in the front-rear direction on the lower end surface of the rear portion of the leg, and an attachment hole is formed through the rear grounding member at the same interval as the screw holes. The desk leg device according to any one of claims 1 to 3, wherein a plurality of bolts are screwed into the screw holes from the attachment holes, and the rear grounding member is attached to the leg body.

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