JPH0451623Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to a device for locking the back and forth movement of the top plate of a study desk used by children at home.

《Conventional technology and problems》 Conventional study desks have a wide leg area, a study assistant sits alongside the user, and even when sitting on a chair, the feet do not rest on the floor. For younger children who are unable to touch the surface and pull the chair forward, there is one that allows the top to be pulled forward.

However, all of these devices could only be operated in two positions: with the top pulled out or with the top retracted.

[Purpose and structure of the present invention] The present invention improves the above-mentioned drawbacks, allows the top plate to be pulled forward in stages and maintains that state, and has a simple structure and can be manufactured at low cost. The purpose is to provide a back and forth locking operation for the top plate of desks, etc. with excellent safety, and the structure consists of a top plate with a rail device and a lock device arranged between the top plate of the desk body and the back of the top plate. In the back-and-forth movement lock device, the lock device includes an engagement member that is attached to the top plate of the desk main body and has a plurality of engagement recesses at predetermined intervals in the front and back direction, and a consisting of a lock rod that is rotatably held in parallel with the engagement member, has an engagement protrusion at the rear end that always engages the engagement recess, and has an operating section at the front end; The operating portion is provided within an operating notch of the finger jam prevention rim, which has a depth dimension that prevents the fingertips from sinking backwards when the palm is pressed against the front end of the top plate.

"Example" Examples will be described below based on the drawings.

In Figure 2, 1 is the desk body, 2 is a top plate attached to the desk body 1, 21 is a desk bookshelf attached above the rear end of the top plate 2, and 3, 3 are the desk body 1 and the top plate. A rail device 5 is provided at the left and right ends between the plates 2, and a lock device 5 is provided approximately at the front of the center between the desk body 1 and the top plate 2.

The desk body 1 includes a sleeve cabinet 11 having four drawers in the vertical direction, legs 12 standing upright at a predetermined distance from the sleeve cabinet 11, and legs 12.
A desk body top plate 13 attached to the upper end and the top surface of the sleeve cabinet 11, a center drawer 14 formed on the left lower surface of the desk body top plate 13, and a leg body 1.
2 and the sleeve cabinet 11, a footrest 15 whose height can be freely adjusted is provided at the lower front end between the sleeve cabinet 11, and a lower shelf 16.
It is composed of a rear plate 17 and the like.

As shown in FIG. 4, in normal use, the top plate 2 has front, rear, left and right end surfaces that are the front surface of the desk body 1 (the front surface of the front panel of the drawer of the sleeve cabinet 11 and the front surface of the front panel of the center drawer 14), and With the palm of the hand pressed against the front end surface of the top plate 2 in the width direction of the lower surface of the front end protruding from the left and right end surfaces of the legs 12 and the sleeve cabinet 11, and the rear end surfaces of the legs 12 and the sleeve cabinet 11, the fingertips A finger jam prevention protrusion 21 is formed with a depth dimension that does not allow it to crawl backwards,
A notch 22 for operating the locking device 5 is formed approximately at the center of this finger jam prevention ridge 21.

Continuing with the left and right ends of the finger jam prevention projection 21, left and right projections 23, 23 are formed in the depth direction of the lower surface of the left and right ends of the top plate 2, and the upper part of the desk body top plate 13 and the top A predetermined space 20 is formed on the lower surface of the plate 2, behind the finger jam prevention ridge 21, and between the left and right ridges 23, 23, in which the rail devices 3, 3, lock device 5, etc. are attached.

As shown in FIGS. 5 and 6, the rail device 3 includes moving side rails 31 provided in the depth direction of the left and right ends of the predetermined space 20 and connected to the back surface of the top plate 2.
The fixed side rail 32 holds the movable side rail 31 slidably in the front-rear direction and is connected to the desk main body top plate 13.

The fixed side rail 32 is formed by extrusion molding of a synthetic resin material, and has a sliding groove 321 with an open top surface.
, sliding holding grooves 322 , 322 formed on the left and right side portions slightly above the sliding groove 321 , and mounting protrusions 32 formed to protrude laterally on the lower left and right end sides.
3, 323, and on the upper surface of the sliding groove 321 and the lower surface of the upper walls 324, 324 of the sliding holding grooves 322, 322, there are sliding protrusions 325, for smoothly sliding the moving side rail 31, 325, 326, and 326 are formed.

The fixed side rail 3 configured as described above comes into contact with the upper wall 324 of the sliding holding grooves 322, 322, and the upper surface of the mounting protrusion 323, and the fixed side rail presser is screwed to the desk main body top plate 13. Material 327, 327
, the moving side rail 3 comes into contact with the upper surface of the sliding groove 321.
The end of the 1 side protrudes upward and the front and rear stoppers 3
31, 341 are formed, and are fixed on the desk main body top plate 13 by front and rear stopper members 33, 34 screwed to the desk main body top plate 13.

The moving side rail 31 consists of a sliding part 311 located above the sliding groove 321, and mounting parts 312, 312 screwed to the back surface of the top plate 2, and has a central part of the sliding part 311 and a front and rear part. At the end, a side wall 31
3, 313, and the left and right ends of the slide shaft 314 protrude into the sliding holding grooves 322, 322.
...is attached.

316, 317 are the front and rear stopper portions 33;
It is a front and rear stopper formed corresponding to No. 1,341.

The locking device 5 includes an engaging member 51 attached to a substantially central portion of the desk main body top plate 13 extending in the depth direction.
The locking rod 52 is rotatably held on the back surface of the top plate 2 in parallel with the engaging member 51.

The engagement member 51 has a substantially L-shaped cross section, and has a plurality of engagement recesses 511 spaced apart at predetermined intervals in the front-rear direction on the upper surface.
is formed.

The locking rod 52 has the engagement recess 511 at its rear end.
an engaging protrusion 521 that engages with the
It is held on the back surface of the top plate 2 in parallel with the engagement member 51, and is rotatably held at its front and rear ends by bearings 7, 7 with the front-back direction as a central axis.

The operation part 6 is located in the operation notch 22 of the top plate 2 and connects the front end of the locking rod 52 to the engagement member 51.
Holding the mounting protrusion 522 bent to the side internally,
By wrapping a spring 61 around the front end of the locking rod 52, one end is supported by the back surface of the mounting board 60 screwed to the back surface of the top plate 2, and the other end is supported by the rotating operation section 62 of the operation section 6. , rotational force is always applied to the operating section 6 in the clockwise direction in FIG.

That is, the locking rod 52 is always connected to the engaging protrusion 521.
A rotation force is applied in the direction in which the engagement recess 511 engages with the engagement recess 511 , and the engagement protrusion 521 engages with the engagement recess 511 so that the upper surface of the stopper protrusion 63 of the operating section 6 is brought into contact with the lower surface of the mounting board 60 . The locking rod 52 is prevented from rotating while in contact with the locking rod 52 .

The bearings 7, 7 are of the same shape and face each other in the front and rear, and the lock rod 52 is rotatably held by the upper and lower bearings 71, 72.

Then, attach the operating section 6 to the locking rod 52,
Furthermore, the upper and lower bearings 71 and 72 are fitted from above and below the locking rod 52 and fixed to the mounting board 60 with screws, the locking rod 52 is held rotatably by the bearings 7, and the mounting board 60 is It is screwed to a predetermined location on the back surface of the top plate 2.

The present invention is formed as described above, and the suspension can be used widely from the state shown in Fig. 1, or
When pulling out the top plate 2 toward the front for use by a study assistant who is seated alongside the child, or by a child who cannot pull a chair closer to the desk,
First, push up the rotation operation part 62 of the operation part 6 with your fingertip, rotate the operation part 6 in the counterclockwise direction as shown in FIG.
11, and while maintaining this state, move the top plate 2 to a desired forward position.

When the fingertip is released from the rotation operation part 62, the locking rod 52 rotates clockwise due to the elasticity of the spring 61, and the engagement protrusion 52 engages with the predetermined engagement recess 511.
are engaged, and the top plate 2 maintains the locked state.

Then, the engagement protrusion 52 connects the top plate 2 to the engagement recess 5.
If you pull it out as far forward as possible while deviating from 11,
The front stopper abutment 316 collides with the front stopper portion 331 of the front stopper member 33, and the forward movement of the top plate 2 is stopped, and the engagement recess 511 at the front end and the engagement protrusion 521 are engaged.

Moreover, when the top plate 2 is moved to the rearmost position in the above state, the rear stopper part 3 of the rear stopper member 34
The rear stopper 317 collides with the rear stopper 41, and the backward movement of the top plate 2 is stopped, and the engagement recess 511 and the engagement protrusion 521 at the rear end are engaged.

In addition, 310, 310 is the front and rear stopper part 33
This is a cushioning material provided on the inner surface of 1,341.

Further, in the embodiment, the rail device 3 is composed of a movable side rail 31, a fixed side rail 32, etc., but the configuration of the rails can be changed as appropriate without departing from the gist of the present invention.

<<Effects>> As described above, the present invention has an engaging member extending in the depth direction of the top plate of the desk main body, a plurality of engaging recesses formed at predetermined intervals in the engaging member, and Since a locking rod is provided parallel to the engaging member, and an engaging protrusion that engages with the engaging recess is formed on the locking rod, the structure is simple and easy to assemble, and even if the top plate moves back and forth, The locking rod always maintains a state at an equal distance from the engagement member, and the engagement recess and the engagement protrusion can be engaged at an appropriate position.

Further, since the locking rod has a simple structure of being rotatably held on the back of the top plate, there is no fear of failure and it can be manufactured at a low cost.

In addition, a finger-preventing protrusion is formed on the front end of the top plate,
It is extremely safe because it prevents fingers from getting caught between the back of the tabletop and the top board of the desk body while the tabletop is being moved.

Furthermore, an operating notch is provided in the finger jam prevention rim, and the operating part provided at the tip of the locking rod is located within the operating notch, so that the engaging protrusion can be operated to escape from the engaging recess. It can be done easily,
Even if you move the top plate back and forth while operating it, there is no risk of your fingers getting stuck, making it extremely safe.

[Brief explanation of the drawing]

The figures show one of the embodiments of the present invention. Fig. 1 is a vertical cross-sectional view of the main part of the invention, Fig. 2 is an exploded perspective view of the main part of the invention, and Fig. 3 is the location where the operating section is located. FIG. 4 is a vertical cross-sectional view of the top plate, FIG. 5 is a vertical cross-sectional view of the rail device in the left-right direction, and FIG. 6 is a vertical cross-sectional view of the rail device in the front-rear direction. DESCRIPTION OF SYMBOLS 1... Desk body, 13... Desk main body top plate, 2... Top plate, 21... Finger jam prevention ridge, 22... Operation notch, 3... Rail device, 5... Lock device,
51...Engagement member, 511...Engagement recess, 52...
... Lock rod, 521 ... Engagement protrusion, 6 ... Operation section.

Claims (1)

[Scope of utility model registration request] In a top plate back-and-forth movement lock device in which a rail device and a lock device are arranged between the top plate of the desk body and the back surface of the top plate, the lock device is attached to the top plate of the desk body and has a predetermined interval in the front and back direction. an engaging member in which a plurality of engaging recesses are formed, and the engaging member is rotatably held on the back surface of the top plate in parallel with the engaging member, and the rear end is always engaged with the engaging recesses. It consists of a locking rod with an engaging protrusion and an operating section at the front end, and the operating section is deep enough that the fingertips do not slip into the rear when the palm is pressed against the front end of the top plate. A locking device for back and forth movement of a top plate of a desk, characterized in that it is provided within an operating notch of a finger jam prevention rim having a dimension.