JPH0446590Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is designed to connect the legs and cross beams on both the left and right sides on which the desk top of the desk is placed, so that the cross beams are attached to the inner surfaces of the pair of legs. The present invention relates to a structure of a connecting device for the left and right legs of a desk for firmly connecting each other with the left and right end surfaces in contact with each other.

[Conventional technology]

Conventionally, if the legs on both the left and right sides of a desk were simply fixed directly to the desk top plate placed on them, the legs would tend to tilt to the left or right, so it was necessary to connect a cross beam between the inner surfaces of the left and right legs. It is being done.

In this case, as disclosed in the prior art Publication No. 60-83430, flanges are fixed to both left and right end surfaces of the cross beam, and both flanges are brought into contact with the inner surfaces of each leg. It was common practice to tighten the bolts.

[Problem that the invention attempts to solve]

In this type of connection device, multiple tightening bolts are used, so if the internal threads or fixing nuts that are fixed to the legs are misaligned, all the bolts cannot be tightened. It takes time to connect with the body.

Further, according to the prior art, there was a problem in that unless the flange portions at both left and right ends of the cross beam were made to protrude significantly in the front and back or up and down directions, it was not possible to secure a space for attaching bolts.

The present invention aims to solve this problem.

[Means for solving problems]

Therefore, the present invention provides a connecting device for connecting a cross beam to the left and right legs of a desk, in which locking pieces are supported on both left and right ends of the cross beam and are detachably protruded laterally so as to be movable in a substantially horizontal direction. On the other hand, an engaging piece is provided inside each of the legs to which a downwardly inwardly inclined claw at the tip of each of the locking pieces can abut and lock, and is bored in the inner plate of each leg. The locking piece inserted into the insertion hole and locked to the engaging piece is pulled and fastened to the inside of the cross beam via a bolt inserted into the bracket.

[Functions and effects of the invention]

In this way, according to the present invention, the cross beam and the leg are connected via separate locking pieces, and the cross beam and the locking piece can be packed separately, and the cross beam can be locked from both left and right ends of the cross beam. No pieces stick out too much.

In addition, since an insertion hole is formed in the inner plate of each leg and an engagement piece is provided inside the insertion hole, the tip of the locking piece can be inserted into the insertion hole and the tip of the locking piece can be inserted downward and inward. It is only necessary to lock the slanted claw to the engagement piece, and there is no need to take time to align them with each other, unlike in the case of conventional fastening bolts and nuts.

When the locking piece that is locked to the engaging piece of the leg is pulled into the inside of the crossbeam with a bolt inserted into the bracket of the crossbeam, the locking piece will cause the inside surface of the leg to be pulled into the crossbeam. The two are connected by being pulled together so as to be pressed against the side end surface, and the condition in which the downwardly inwardly inclined claw at the tip of the locking piece locks with the engaging piece on the leg side is parallel to the abutment surface of the two. Instead, it becomes a so-called holding state due to the surface that slopes with it, so that a strong connection effect can be achieved.

Furthermore, since the brackets at both left and right ends of the cross beam support each of the locking pieces so as to be movable in a substantially horizontal direction, the locks temporarily fastened to the brackets of the cross beam via bolts are The posture of the piece is in a substantially horizontal state and it projects laterally, which has the effect that positioning work when inserting the tip of the locking piece into the leg body is extremely simple.

Particularly, when the bracket is arranged in a continuous manner with the vertical plate part of the cross beam, the locking piece can be guided also along the vertical plate part, and the posture of the locking piece can be maintained.

Furthermore, the engaging piece provided in each leg body is bent into a stepped shape, and an inclined engaging hole is cut out in the stepped part, into which the downwardly inwardly inclined claw at the tip of the engaging piece is fitted and locked. If the locking piece is formed into a plate shape, the locking piece itself can be easily maintained in a position perpendicular to the inner plate of the leg without being twisted.

〔Example〕

Next, to explain an embodiment of the present invention, a desk 1 shown in the figure includes a pair of left and right legs 2, 2, a cross beam 3 that horizontally connects the upper parts of the legs, and a cross beam 3 and both left and right legs 2, 2. A desk top plate 4 is placed between the upper surfaces so as to be freely movable back and forth, and a left and right longitudinal wiring tray 5 with an open upper surface is connected to the upper portions of the left and right legs 2 behind the cross beam 3. It consists of

Each leg 2 is surrounded by side plates 2a and 2b, and at the lower end of each leg 2, a front and rear longitudinal leg 7 with a front adjuster 7a projects forward, and a rear adjuster 6a is provided.

In addition, a longitudinal partition wall plate 9 is provided at a position near the rear of each leg body 2 so as to roughly divide its thickness into two, and the partition wall plate 9 allows the above-mentioned wiring to be provided at each position inside and outside of the leg body 2. Upper and lower longitudinal cord insertion passages 8a and 8b that can communicate with the side ends of the tray 5 are formed in recesses, and upper and lower longitudinal cover bodies 10 and 11 that can be attached and detached are provided in each cord insertion passage 8a and 8b, respectively.

The cross beam 3 has a downward U-shaped cross section and is longitudinally formed on the left and right sides, and the left and right ends of the cross beam 3 and the pair of left and right legs 2, 2 are removably engaged with a bracket 12 of the cross beam 3. They are firmly connected via a connecting device 15 consisting of a stopper 13, an engaging piece 17 provided in each leg 2, and a bolt 14.

That is, while the lower end of the front vertical plate part 3a of the cross beam 3 is appropriately extended rearward, the lower end of the rear vertical plate part 3b is also extended rearward by an appropriate length. At both left and right ends of the cross beam 3, a pair of front and rear brackets 12, 12 having an inclined surface 12a in the middle of the upper and lower horizontal plate parts 12c, 12c are installed. be welded and fixed to each.

The locking piece 13 is removably attached to the bracket 12 and is placed so as to be movable approximately horizontally, and can protrude laterally from both left and right end surfaces of the cross beam 3.

At the tip of the locking piece 13, there is a downwardly inwardly inclined claw 13.
The locking piece 13 with a is integrally formed, and the locking piece 13
A female threaded portion 13b is welded and fixed to the base end of.

The inclined surface 12a of the bracket 12 has a through hole 12 into which the distal end side of the hexagonal socket bolt 14 that is screwed into the female threaded portion 13b of the locking piece 13 can be inserted.
Drill b.

On the other hand, insertion holes 16 are formed in the side plates 2a and 2b of both leg bodies 2.
a, 16b, and an inclined engagement hole 17a is formed on the upper surface of the stepped portion of the engagement piece 17 fixed between the side plates 2a, 2b.
is bored, and the insertion hole 16 is inserted into the inclined engagement hole 17a.
While dropping and locking the downwardly inwardly inclined claw 13a at the tip of the locking piece 13 inserted into the locking piece 1,
2 Bolt 1 inserted into through hole 12b of inclined surface 12a
4 is screwed and fastened to the female threaded portion 13b of the locking piece 13, the legs 2, 2 on both the left and right sides are drawn to and connected to the side end surface of the cross beam 3.

At this time, a wrench hole 27 is bored in the lower surface plate of the front vertical plate portion 3a of the cross beam 3 so that the hexagon socket head bolt 14 can be easily operated from the lower surface side of the desk.

In addition, a pair of left and right arms 18, 18 having a downward U-shaped cross section are provided on the cross beam 3, projecting forward.
A longitudinal guide hole 19 is bored in the upper surface plate 18a and the upper surface plate of the cross beam 3, and the rotary roller 25 projecting downward from the lower surface of the desk top plate 4 is made to face into the arm body 18 through the guide hole 19. On the other hand, a front and rear longitudinal reinforcing arm 20 is fixed inside the arm body 18, and the reinforcing arm 20
Fixing bolts 21 and adjustment bolts 22 at the front and rear positions respectively.
A pair of bolts are provided to protrude upward.

Between the arm body 18 and the reinforcing arm 20, there is a horizontal cross-sectional Y that guides the side surface of the rotating roller 25 in the front-rear direction.
A letter-shaped guide rail 23 is attached via a mounting body 24 made of synthetic resin or the like so that its left and right position can be adjusted freely and it can be attached and detached.

Reference numeral 26 denotes a horizontally rotatable hook body that locks the desk top 4 to the cross beam 3 so that it cannot move back and forth when the desk top 4 is retracted backwards.

Reference numeral 29 denotes a left and right longitudinal rear stile member that connects the left and right legs by exposing a detachable connecting device 28 to a position near the rear end of the pair of left and right legs 2, 2, and the rear end of the rear stile member 29. The reinforcing portion 29a is formed so as to have a U-shaped cross section and open forward.
A substantially horizontal support plate portion 29 with the lower end of a extended forward.
b, the front end of the support plate portion 29b is placed on the rear end of the cross beam 3, and the wiring tray 5 is placed and fixed on the upper surface of the support plate portion 29b.

The wiring tray 5 placed and fixed on the upper surface of the support plate portion 29b of the rear stile member 29 is shown in FIGS.
As shown in the figure, the cords 36, 36, 36 inserted into each of the cord storage areas are divided by wall plates 5a so as to form a plurality of cord storage areas along the longitudinal direction. While the groove 35 cut out at the rear end of the plate 4 can lead to the upper surface of the desk top plate 4, as shown in FIG. It can also be led to cord insertion passages 8a and 8b.

Note that the reference numeral 37 is a slider made of synthetic resin that the lower surface of the desk top plate 4 comes into contact with, and the reference numeral 38 is a cover that covers the lower and front surfaces of the arm body 18.

With this configuration, when the desk 1 is arranged so that its rear end is in contact with the wall 39 in the room, the hook body 26 is removed from the cross beam 3, and the desk top plate 4 is pulled out in the forward direction,
As shown in FIGS. 2 and 3, the rear edge of the desk top plate 4 is separated from the wall 39, leaving a large gap.
This means that the upper surface of the wiring tray 5 disposed near the rear upper surface of the left and right legs 2, 2 is opened.

Therefore, the necessary cords 36 can be aligned with the wiring tray 5 and guided in the left and right longitudinal directions, and can also be guided through the grooves 37 to the upper surface of the desk top plate 4.

To assemble the desk 1, the pair of left and right legs 2, 2 and the cross beam 3 are connected via the removable locking pieces 13 and bolts 14, so that they are locked from both left and right ends of the cross beam before assembly. Since the piece 13 does not protrude, the locking piece 13 does not become bulky during packaging, and there is no damage such as bending of the locking piece 13.

The locking piece 13 locked to the engaging piece 17 of the leg body 2,
When the bolt 14 inserted into the bracket 12 of the cross beam 3 is tightened so as to pull it into the inside of the cross beam 3, the locking piece 13 pulls the inner surface of the leg 2 to be pressed against the side end surface of the cross beam 3. The downwardly inwardly inclined claw 13a at the tip of the locking piece 13 engages the engaging piece 1 on the leg side.
7 is in a so-called holding state with a surface that is not parallel to the abutment surface of the two but is inclined thereto, so that a strong connection action can be achieved.

The downward inwardly inclined claw 13a at the tip of the locking piece 13 enters into the thickness of the leg 2, and the bracket 1 of the cross beam 3
By tightening the bolt 14 inserted into the leg 2
The inner side plate and the side end surface of the cross beam 3 can be pulled together so that they come into contact with each other at approximately right angles, and can be firmly connected.

At this time, the locking piece 13 and the insertion hole 16a of the leg body 2
, the relationship between the locking piece 13 and the bracket 12 that is its supporting member, and the relationship between the bracket 12
The bolt 14 to be inserted into the female thread part 1 of the locking piece 13
3b, each having flexibility in position relative to each other, the assembly work is simple, and there is no need to take time to align the positions with each other, unlike in the case of conventional fastening bolts and nuts.

Furthermore, since the brackets 12 at both left and right end portions of the cross beam support each of the locking pieces 13 so as to be movable in a substantially horizontal direction, they are temporarily fixed to the bracket portions of the cross beam via bolts 14. The position of the locking piece is substantially horizontal and protruding sideways, and the positioning operation when inserting the tip of the locking piece into the leg becomes extremely easy.

Particularly, when the bracket 12 is arranged in a continuous manner with the vertical plate part of the cross beam, the locking piece 13 is also guided along the vertical plate part, so that the locking piece 1
Can maintain posture 3.

Further, the engaging piece 17 provided in each leg body is bent into a stepped shape, and an inclined engaging hole 17a is cut out in the stepped portion, into which the downwardly inwardly inclined claw 13a at the tip of the engaging piece is fitted and locked. If the locking piece is formed into a plate shape, the locking piece itself can be easily maintained in a position perpendicular to the inner plate of the leg without being twisted.

Moreover, if the insertion holes 16a and 16b are formed symmetrically in the inner and outer side plates 2a and 2b of the leg body 2, and the inclined engagement hole 17a of the engagement piece 17 is also formed symmetrically, the leg The body 2 can also be used for both left and right hands.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view of a desk, FIG. 2 is a plan view, and FIG. 3 is a view of the desk shown in FIG.
4 is an enlarged sectional view taken along the - line in FIG. 1, FIG. 5 is a sectional view taken along the - line in FIG. 4, and FIG.
The figure is a plan view of the cross beam, FIG. 7 is a plan view taken along the - line in FIG. 4, FIG. 8 is a sectional view taken along the - line in FIG. . 1...Desk, 2, 2...Legs, 3...Horizontal beam, 4...
...Desk top plate, 5...Wiring tray, 8a, 8b...
Insertion path, 9... Division wall plate, 10, 11... Cover body, 12... Bracket, 13... Locking piece, 13
a... Lower inward inclined claw, 13b... Female threaded part,
14... Bolt, 16a, 16b... Insertion hole, 1
7... Engagement piece, 17a... Inclined engagement hole, 18...
Arm body, 19...Guide hole, 23...Guide rail, 24...Mounting body, 25...Rotating roller, 26
... hook body, 29 ... rear frame member, 36 ... code.

Claims (1)

[Scope of utility model registration request] In a connecting device for connecting a cross beam to the left and right legs of a desk, brackets are fixed to both left and right ends of the cross beam for movably supporting each locking piece detachably projecting laterally in a substantially horizontal direction. ,
An engaging piece is provided inside each of the legs to which a downwardly inwardly inclined claw at the tip of each of the engaging pieces can abut and lock, and the engaging piece is inserted into an insertion hole drilled in the inner plate of each leg. A device for connecting left and right legs of a desk, characterized in that the locking piece that is locked to the engaging piece is pulled and tightened to the inside of the cross beam via a bolt inserted into the bracket.