JP2815305B2 - Portable desk - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable desk which can be folded and carried around a camp or a drive.

[0002]

2. Description of the Related Art In general, a portable desk of this type includes a top plate that can be folded into a case shape and legs that can be folded. Then, with the legs removed from the top plate, the legs are folded and stored in a storage portion provided on the back surface of the top plate. Subsequently, the top plate is folded so as to enclose the legs, so that the legs and the top plate can be carried.

[0003]

However, in this conventional configuration, when the top plate is folded, the storage portion is provided at an upper position of the top plate. There is a problem that the posture of the top plate becomes unstable due to the weight of the legs and the like. Further, conventionally, since the legs are simply stored in the storage portion, there is a problem that the legs are loose during transportation and hinder the carrying.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a portable desk which can hold a posture of a folded top plate in a stable state. It is in.

[0005]

According to the first aspect of the present invention, there is provided a top plate which is formed to be foldable, and which is provided so as to be detachable and foldable from the top plate. A portable table having folded legs and capable of storing folded legs in a folded top plate, wherein the top plate includes at least three bed plates connected to each other in a bendable manner. When the board is folded, each of the base plates is placed in the lower storage space surrounded by the base plate.
There is a storage recess for legs on the back of one base plate that will be the bottom of
The other two are formed and located on both sides of the one base plate
The gist of the invention is that a holding portion for abutting and holding a folded leg disposed in the storage recess is formed on the back surface of the base plate .

In the invention according to the second aspect, the storage recess for the leg is arranged at a position symmetrical with respect to a center line in the width direction of the folded top plate. Things.

[0007]

According to the first aspect of the present invention, the legs are detached from the top plate, the holding of the top plate in a flush state is released, and the legs are folded. Next, the storage recess
After the legs are stored inside , the top plate is bent around each base plate to form a storage space. Therefore, since the storage recess is located at the lower portion of the storage space, when the legs are stored in the storage recess , the weight is biased toward the lower portion of the storage space. Therefore, the posture of the top plate in the folded state is stabilized. Further, since the folded legs are brought into contact with the holding portion, the legs can be carried without rattling when the portable desk is carried.

According to the second aspect of the present invention, in addition to the operation of the first aspect, the weight distribution of the top plate folded so as to rotate is symmetrical about the center line in the width direction. > Therefore, the posture of the top plate in the folded state is stabilized.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 11, the portable desk 1 includes a foldable top plate 2 and foldable legs 3. In the leg 3, a sliding tube 5 is loosely inserted into four leg rods 4 arranged at equal intervals so as to be slidable along the axial direction. A pair of mounting pieces 6 arranged in a direction perpendicular to each other are protruded from the side wall of the sliding tube 5, and the mounting pieces 6
Is pivotally supported at its lower end. The connecting plates 7 cross each other at the center in the longitudinal direction, and the intersections of the connecting plates 7 are rotatably connected by pins 8.

As shown in FIGS. 4 and 8, a cap 9 having a substantially rectangular cylindrical shape is fitted on the upper end of the leg 4. A pair of mounting pieces 10 arranged in a direction orthogonal to each other are projected from the side wall of the cap 9, and the upper end of the connecting plate 7 is rotatably supported by the mounting pieces 10.

When the leg 3 is closed, each leg 4
Are moved toward the center of the leg 3 so as to approach each other, whereby the sliding tube 5 is moved to the lowermost position. Accordingly, the connecting plates 7 overlap each other from the crossing state. As a result, each leg 4 is moved to the closest position shown in FIG. Conversely, when the legs 3 are opened, the sliding tubes 5 are moved to the uppermost position shown in FIG. 4 by moving the leg rods 4 in a direction away from each other. Accordingly, the connecting plates 7 intersect from each other in a state where they overlap each other. As a result, each leg 4 is moved to the farthest position shown in FIG.

On the other hand, a connecting rod 12 is detachably connected to the cap 9 by a clip 11. The clip 11 includes a cylindrical base 13, and a head 15 having a key 14 at the lower part of the base 13 that can be deformed in the width direction by bending inward. The cap 9
An insertion port 9b having a diameter slightly smaller than that of the key portion 14 is formed at the upper end of. The key portion 14 of the clip 11 is engaged with the cap 9 through the insertion opening 9b,
4 is positioned at the step 9a of the cap 9.

Next, the top plate 2 will be described. FIG.
As shown in FIG. 3, the top plate 2 is made of polypropylene,
It comprises a pair of side wall base plates 16 and 17 and a bottom wall base plate 18. Side plate 16, 17 and bottom wall plate 1
8 are integrally formed by blow molding, and each base plate 16-1
The inside of 8 is hollow. Base plates 16, 17 for both side walls
A base plate 18 for the bottom wall is arranged between the base plates, and the base plates 16 to 18 are connected to each other by a flexible thin portion 19 so as to be bendable.

Wall portions 16a, 17a, and 18a as circling portions project from the back surface edges of the side wall base plates 16, 17 and the bottom wall base plate 18 so as to go around the periphery of the top plate 2. Has been established. Then, as shown in FIG.
When the first and the second and the third and the sixth are bent in a direction approaching each other, the end faces of the respective wall portions 16a to 18a come into contact with each other,
The top plate 2 is deformed into a substantially triangular prism shape. In this state, a storage space S for the leg 3 and the connecting rod 12 is formed by being surrounded by the walls 16a to 18a. Notch surfaces 16b to 18b are formed at the tops of the respective wall portions 16a to 18a. The storage space S is surrounded by the cutout surfaces 16b to 18b with the formation of the storage space S.
A communication hole 20 that communicates with the outside is formed.

The recesses 3 are formed on the back surfaces of the side walls 16 and 17.
1, 32 are formed. A first sandwiching portion 21 disposed on the same straight line protrudes from the concave portions 31 and 32 and the back surface of the bottom wall base plate 18 at positions near each end.
As shown in FIGS. 6 and 7, an engagement groove 21 a is formed on the back surface of the first holding portion 21, and the engagement groove 21 a is recessed toward the top plate surface 2 a of the top plate 2. A pair of elastic locking projections 22 are provided on both side walls of the engagement groove 21a so as to face each other.

As shown in FIG. 9, the connecting rod 12 can be engaged and disengaged in the engaging groove 21a of the first holding portion 21. The length of the connecting rod 12 is shorter than the length of the concave portions 31 and 32 in the longitudinal direction, and can be stored in the concave portions 31 and 32. The connecting rod 1 is inserted into the engagement groove 21a.
When the engaging rod 2 is resiliently engaged, the locking ridge 22 is pressed against the side surface of the connecting rod 12, whereby the connecting rod 12 is engaged and held in the engaging groove 21a.

In this state, the top plate surface 2a is
2 keeps them in the same plane. Further, when the connection rod 12 is released from the engagement groove 21a, the top plate surface 2a is released from the flush state, and the base plates 16 to 18 can be folded together. In addition, as shown in FIG.
Are provided with a plurality of non-slip grooves 23 as anti-slip members extending in the longitudinal direction of the respective base plates 16 to 18. The non-slip groove 23 prevents the object placed on the top plate surface 2a from slipping.

Each recess 3 of the side wall base plates 16 and 17
At positions near each end in the longitudinal direction of the first and second end portions 32, a second holding portion 24 having the same shape as the first holding portion 21 and having a resilient locking ridge 22 is provided on the same straight line. It is arranged to protrude. The engagement groove 24 of the second holding portion 24
a is disposed so as to be orthogonal to the engaging groove 21a of the first holding portion 21. Between the second holding grooves 24 on the back surface of each of the side wall base plates 16 and 17, a flat rectangular recess 25 is formed. The recess 25 serves as a holding space for holding the connecting rod 12 provided between the second holding portions 24 by hand.

Furthermore, a long hole 26 for a handle is formed in the outer edge of the side wall base plates 16 and 17. In addition, an engagement groove 27 extending along the longitudinal direction of the base plate 16 is formed in the back surface edge of the one side wall base plate 16. An engagement ridge 28 extending along the longitudinal direction of the base plate 17 is formed on the back surface edge of the other side wall base plate 17. And FIG.
The top plate 2 is held in a folded state by the engagement protrusions 28 being press-fitted into the engagement grooves 27 as shown in FIG.

As shown in FIGS. 1 and 2, the base plate 18 for the bottom wall is provided.
On the rear surface of the formed planar rectangular shape of a to retract and the recess 29, the same housing recess 29 leg 3 which is folded and has a possible storage. When the top plate 2 is folded, the storage recess 29
Is located below the storage space S. The storage recesses 29 are arranged symmetrically with respect to the center line C in the width direction (the left-right direction in FIG. 1) of the top plate 2.

Each of the recesses 31 and 32 of the side wall base plates 16 and 17 is provided with a pair of holding projections 30 as a pair of holding sections along the longitudinal direction. When the top plate 2 is folded, the end surfaces of the holding projections 30 are brought into contact with the leg rods 4 located on the left and right sides (the left and right sides in FIG. 1) of the leg 3, thereby preventing the leg 3 from rattling.

In the recesses 31 and 32 of the side wall base plates 16 and 17, a step portion 33 is recessed toward the top plate surface 2a. Top plate 2
Is folded, a part of the first holding portion 21 of the bottom wall base plate 18 enters into the stepped portion 33, whereby the concave portion 3 is formed.
Interference between the bottom surfaces of the first and second holding portions 21 and the first holding portion 21 is avoided.

Next, the operation of the portable desk 1 configured as described above will be described. First, how to fold the portable desk 1 will be described. In the state of FIG. 11, the connecting rod 12 is held by the first holding portion 21 on the back surface of the top plate 2, and the leg rod 4 is connected to the clip 11 of the connecting rod 12 via the cap 9.

From the state shown in FIG. 11, the head 15 of the clip 11 is bent inward to release the engagement between the cap 9 and the clip 11. Thereby, the leg 4 is removed from the connecting rod 12 and the leg 3 is removed from the top plate 2. Then, the leg rods 4 are moved in a direction approaching each other, and as shown in FIG.
Fold.

Next, the pair of connecting rods 12 held by the first holding portion 21 is pulled out from the engaging groove 21a against the elasticity of the locking ridge 22. Then, the connecting rod 12 is engaged with the engaging groove 24a against the elasticity of the locking ridge 22 of the second holding portion 24.
Get in. At this time, since the holding of the connecting rod 12 by the first holding portion 21 is released, the top plate surface 2 of the top plate 2 is released.
The horizontal holding of a is released. After that, the folded leg 3 is stored in the storage recess 29.

Subsequently, the base plates 16 to 18 are bent so that the bottom wall base plate 18 is at the bottom, and the side wall base plates 16 and 17 are bent.
Are aligned with each other so that the engaging ridges 28
Insert. Then, as shown in FIG. 3, the top plate 2 is deformed from a planar shape to a substantially triangular prism shape. And
Adjacent end faces of the wall portions 16a to 18a of the base plates 16 to 18 are in contact with each other to form a storage space S for storing the legs 3 and the connecting rods 12. Further, the engagement ridge 28 and the engagement groove 2
7, the top plate 2 is held in a folded state.

In this folded state, each holding projection 3
The front end surface of the leg 0 is in contact with the left and right sides (the left and right sides in FIG. 1) of the leg 3 housed in the housing recess 29 from both sides. Therefore, when carrying the folded top board 2, the legs 3 do not rattle.

Conversely, when using the portable desk 1 in the folded state, the engagement between the locking ridge 28 and the engaging groove 27 is released, and the side wall base plates 16 and 17 are separated from each other. The top plate 2 is unfolded and unfolded. Next, the leg 3 is removed from the storage recess 29 and the leg is opened. Further, a hand is put into the recess 25 to pull out the pair of connecting rods 12 from the second holding portion 24 against the elastic force of the locking ridge 22, and to resist the elastic force of the locking ridge 22. And is inserted into the engagement groove 21a of the first holding portion 21. The top bar surface 2a of the top plate 2 is kept flush by holding the connecting rod 12 by the first holding portion 21. As described above, the top plate 2 and the legs 3 are assembled in a use state.

Next, the cap 9 of the leg 4 is bent while bending the head 15 of each clip 11 inward against its own elastic force.
Into the insertion slot 9b. Then, the head 15 is inserted into the insertion port 9
b and spreads outward at the same time, and the head 15 is prevented from falling out of the step 9a of the cap 9, and the assembling work of the portable desk 1 is completed.

In this embodiment, the storage recess 29 is located below the storage space S with the top plate 2 folded into a substantially triangular prism shape. Therefore, when the leg 3 is stored in the storage recess 29, the weight of the leg 3 can be biased toward the lower portion of the storage space S, and the folded state of the top plate 2 is maintained in a stable state. be able to.

When the top plate 2 is folded, the end faces of the holding projections 30 are brought into contact with the leg rods 4 located on the left and right sides of the leg 3. For this reason, the Ru can prevent rattling of the legs 3 at the time of the portable desk 1 carry, it can carry a portable desk without any trouble.

Further, the storage recess 29 is disposed so as to be symmetrical with respect to a center line C in the width direction (left-right direction in FIG. 1) of the portable desk 1 having a substantially triangular column shape. For this reason, when the legs 3 are stored, the weight balance in the width direction of the top plate 2 in the folded state becomes uniform, and the posture of the top plate 2 in the folded state can be held in a stable state.

In addition, since the shape of the top plate 2 when it is folded is deformed into a triangular prism shape, space can be saved without forming a useless space in the storage space S. 2 can be downsized.

The present invention can be carried out in the following manner. (A) In the above embodiment, the non-slip groove 23 is provided on the top plate surface 2a. However, instead of the non-slip groove 23, a non-slip ridge or a non-slip projection may be used. In addition to the blow molding method, a two-color molding method, an injection molding method, a press molding method, or a later-described assembling / adhering operation allows the non-slip ridge and the non-slip projection to use a material different from the top plate surface 2a. It may be molded.

(B) A non-slip rubber may be provided in the non-slip groove 23 so as to be flush with the top plate surface 2a. By doing so, it is possible to make sure that the object placed on the top plate surface 2a does not slip while the entire top plate surface 2a is flush with the anti-slip rubber.

(C) Although the synthetic resin is used as the material of the top plate 2, other materials may be used, such as wooden or aluminum. If it is made of aluminum, it is possible to improve the weight and rigidity.

(D) In the above embodiment, each base plate 16-18
Although the thin portion 19 is used as the hinge, the hinge may be changed to a hinge other than the thin portion 19. (E) In the above embodiment, the top plate 2 is constituted by a pair of side wall base plates 16, 17 and a bottom wall base plate 18. On the other hand, as long as the top board 2 has three or more base plates, any number of base plates may be used. Therefore, although the top plate 2 is folded in a substantially triangular prism shape in the above-described embodiment, it is also possible to fold it into other shapes such as a quadrangular prism to a decagonal prism.

(F) The leg 4 of the leg 3 in the above embodiment may be configured to be extendable and contractible. With this configuration, the height of the portable desk 1 in use can be freely changed. (G) Although the four leg rods 4 of the leg 3 in the above embodiment are used, one leg rod 4 may be omitted and the leg 3 may be changed to a tripod. With this configuration, the leg 4 is omitted,
The weight can be reduced.

(H) The top plate 2 is provided on the side wall base plates 16 and 17.
It is also possible to form an opening that communicates when is folded, and lock the opening with a key or the like. With this configuration, when carrying the top plate 2, the engaging groove 27 and the engaging ridge 2
8 can be prevented from being released, so that the top plate 2 can be prevented from unfolding.

Other technical ideas grasped for the above embodiment will be described together with their effects. (1) The portable desk according to claim 1, wherein a non-slip member (23) is provided on the top plate surface (2a) to prevent the mounted object from slipping. According to this configuration, the non-slip member 23 can prevent the mounted object from slipping on the top plate surface 2a.

(2) In the portable desk according to the first aspect, each of the orbiting portions 16a to 18a has a communication hole 20 for communicating the storage space S with the outside when the top plate 2 is folded. Characterized in that notches 16b to 18b are provided. According to this configuration, it is possible to prevent a finger or the like from being pinched between the orbiting portions 16a to 18a when the top plate 2 is folded.

In this specification, the means relating to the constitution of the present invention is defined as follows. The polypropylene used as the material of the top plate 2 is a thermoplastic resin, and includes olefin resins such as polypropylene and polyethylene, and styrene resins.

[0043]

As described above in detail, according to the first aspect of the present invention , the storage recess is provided in the base plate serving as the bottom, and the storage recess is provided.
The legs are stored in. For this reason, since the weight distribution in the storage space is biased to the lower part, the posture of the folded top plate can be maintained in a stable state. Further, there is an excellent effect that the portable desk can be carried without any trouble since there is no backlash of the legs when the portable desk is carried.

According to the second aspect of the present invention, when the openable legs are stored, the weight balance of the folded top plate in the width direction becomes uniform. Therefore, there is an excellent effect that the posture of the top plate in the folded state can be maintained in a stable state.

[Brief description of the drawings]

FIG. 1 shows an embodiment embodying the present invention, and FIG.
It is -A sectional drawing.

FIG. 2 is a development view of FIG. 3;

FIG. 3 is a perspective view showing a state in which the top plate is folded.

FIG. 4 is an exploded perspective view showing an engagement relationship between a leg and a connecting rod.

FIG. 5 is a perspective view showing a state where the legs are folded.

FIG. 6 is also a cross-sectional view of a first holding portion.

FIG. 7 is a front view of the first holding unit.

8 is a sectional view taken along the line BB of FIG. 10;

FIG. 9 is a sectional view taken along the line CC of FIG. 10;

FIG. 10 is a rear view showing a state where the top plate and the legs are assembled.

FIG. 11 is a perspective view showing a state where the top plate and the legs are assembled.

[Explanation of symbols]

2 top plate, 2a top plate surface, 3 legs, 12 connecting rod, 1
6,17 ... sidewall support plate (base plate), 18 ... bottom wall support plate (base plate), 29 ... storage concave portion, 30 ... holding projection (holding part), S
... storage space

Claims (2)

(57) [Claims] 1. A foldable top plate (2),
A portable desk comprising a leg (3) detachably provided on the top plate (2) and foldable, and capable of storing the folded leg (3) in the folded top plate (2). In the above, the top plate (2) is composed of at least three base plates (16 to 18) connected to each other so as to be bendable, and each of the base plates (16 to 18) is folded when the base plates (16 to 18) are folded. In the lower storage space (S) surrounded by 16-18)
One of the base plates (16 to 18) serving as a bottom portion
A storage recess (29) for the leg (3) is formed on the back surface of (18).
The other two plates located on both sides of the one base plate (18).
The storage recesses (2) are provided on the back surfaces of the two base plates (16, 17).
9) A portable desk characterized in that a holding portion (30) is formed for holding the folded leg (3) placed in the inside in abutment. 2. The storage recess (29) for the leg (3) is arranged at a position symmetrical with respect to a center line in the width direction of the folded top plate (2). The portable desk according to claim 1.