JP2003339478A - Bed equipment - Google Patents

Abstract

(57) [Problem] To provide a bed device in which a bed frame can be easily disassembled and assembled, and sufficient strength can be obtained at the time of assembly. SOLUTION: In a bed apparatus having a bed frame 1 in which a pair of strip-shaped end plates 2 and side plates 3 are assembled in a rectangular frame shape, the end plates are formed to be open to the upper end in the height direction at the ends. And the first member and the second member are formed at the end of the side plate so as to be open at the lower end in the height direction and are engaged with the first engagement groove. A second engagement groove 5 for detachably connecting the first and second members, a first side surface and a second side surface, and the first side surface is provided on at least one of the end plate and the side plate. The second side surface when the first member and the second member are assembled into a rectangular frame by engaging the first engagement groove and the second engagement groove and provided in a joined manner. Is opposed to the side surface of the other member to prevent the connection between the first member and the second member from rattling.
And

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed apparatus in which a bed frame is constructed by assembling a pair of side plates and a pair of end plates into a rectangular frame shape.

[0002]

2. Description of the Related Art Generally, a bed apparatus has a bed frame in which a pair of end plates and a pair of side plates are assembled in a rectangular frame shape, and a floor plate is installed between the side plates of the bed frame. The mattress is mounted on the.

In the bed apparatus having the above-mentioned structure, in order to facilitate the assembly of the bed frame, a structure in which the end portions of the side plate and the end plate are detachably connected by a connecting tool is adopted. There is. By using the connecting tool, it is possible to improve the assemblability of the bed frame. However, since a connecting tool must be used to assemble the bed frame, the cost may increase accordingly.

Therefore, it has been considered to assemble the side plate-like side plates and end plates of the bed frame into a rectangular frame shape without using a connecting tool. As one of the methods, a first engaging groove opened at the upper end in the height direction is formed at one end of the side plate and the end plate with a depth of about half the height of the plate, and the other end is formed. A second engaging groove opened at the lower end in the height direction is formed in the portion at a depth of about half the height of the plate material. And the first
The pair of side plates and the end plate can be assembled in a rectangular frame shape by engaging the engaging groove and the second engaging groove.

[0005]

According to the bed frame having the above structure, the pair of side plates and the end plates can be assembled in a rectangular frame shape without using a connecting tool, so that the cost can be reduced or the assembly can be performed. It becomes possible to facilitate the work.

However, the side plate and the end plate only engage the first engaging groove and the second engaging groove formed in these end portions, respectively. The width dimension of the engaging groove formed in each plate member is set to be slightly larger than the thickness dimension of the plate member so that the first and second engaging grooves can be easily engaged with each other. .

Therefore, when the pair of side plates and the end plate are assembled into a frame shape by engaging the engaging grooves of each other, the side plate and the end plate are separated due to the difference between the width dimension of the engaging groove and the thickness dimension of the plate material. Since it is unavoidable that there is a gap in the connecting part of the bed frame, when the bed frame receives an external force, there is a case where it is not possible to make a strong connecting structure such as swaying.

According to the present invention, when the engaging groove is formed at each of the ends of the strip-shaped first member and the second member and the engaging groove is engaged to form the bed frame, First
It is an object of the present invention to provide a bed device capable of firmly connecting the member and the second member without rattling.

[0009]

According to a first aspect of the present invention, there is provided a bed apparatus having a bed frame in which a pair of strip-plate-shaped first members and second pair members are assembled in a rectangular frame shape. A first engaging groove formed at an end of the first member and opened at an upper end in the height direction; and a first engaging groove formed at an end of the second member and opened at a lower end in the height direction, and A second engaging groove for detachably connecting the first member and the second member by engaging with the engaging groove of No. 1, and a first side surface and a second side surface, The first side surface is joined to at least one side surface of the first member and the second member, and the first engagement groove and the second engagement groove are engaged with each other to provide the first side surface. When the above member and the second member are assembled into a rectangular frame shape, the above second
And a side wall of the other member facing the side surface of the other member to prevent rattling of the connection state between the first member and the second member. is there.

According to a second aspect of the present invention, the steady rest member comprises:
The first side surface is provided by being joined to the outer surface of one end of either the first member or the second member, and the first member and the second member are assembled in a rectangular frame shape. The bed apparatus according to claim 1, wherein the second side surface faces the outer surface of the end of the other member.

According to a third aspect of the present invention, the steady rest member comprises:
The first side surface is provided by being bonded to the inner surface of either one of the first member and the second member, and the first member and the second member are assembled in a rectangular frame shape to form the first side surface. The bed apparatus according to claim 1, wherein the side surface of the second member faces the inner surface of the other member.

According to a fourth aspect of the invention, the steady rest member is
4. A receiving bar that engages and supports both widthwise ends of a floor plate provided on the bed frame.
It is in the bed equipment described.

According to the invention of claim 5, in a bed apparatus having a bed frame in which a pair of end plates and a pair of side plates are assembled in a rectangular frame shape, one end surface in the height direction is provided at both end portions of the end plate. The first engaging groove formed to be open to the first side, and the first engaging groove formed to be open to one end face in the height direction at both end portions of the side plate and engaging with the first engaging groove. A second engaging groove for detachably connecting the end plate and the side plate;
And a second side surface, the one side surface being joined to the outer surface of at least one of the end plate and the side plate, and the first engagement groove and the second engagement. When the end plate and the side plate are assembled into a rectangular frame shape by engaging with the groove, the steady side member whose second side surface faces the other side surface, and one side surface is joined to the inner surface of the side plate. When the end plate and the side plate are assembled in a rectangular frame shape, the end face in the longitudinal direction faces the inner surface of the end plate and the steady state of the end plate and the side plate rattles. The bed device is provided with a receiving bar for preventing the above.

According to a sixth aspect of the present invention, each of the pair of side plates is divided into a pair of divided pieces at a midway portion in the longitudinal direction, and is disassembled by a connecting tool. In bed equipment.

According to a seventh aspect of the present invention, a pair of split pieces each have a fitting hole opened at the connecting end face, and each of the fitting holes is connected when the pair of split pieces are connected by the connecting tool. 7. The bed apparatus according to claim 6, wherein one end and the other end of the pin are fitted with each other.

According to the present invention, the first steadying member is provided on the side surface of either one of the first member and the second member.
When the first member and the second member are assembled by engaging the mutual engagement grooves with each other, the second side surface of the steady rest faces the side surface of the other member. By doing so, the first member and the second member can be assembled without rattling.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

1 to 7 show a first embodiment of the present invention, and the bed apparatus shown in FIGS. 1 and 2 comprises a bed frame 1. The bed frame 1 includes a pair of strip-shaped end plates 2 and a pair of side plates 3 that are longer than the end plates 2.
And are formed into a rectangular frame shape. Either one of the end plate 2 and the side plate 3 constitutes the first member of the present invention, and the other constitutes the second member.

At both ends of the end plate 2, a first engaging groove 4 opened at the upper end surface in the height direction is formed with a depth dimension which is about half the height dimension of the end plate 2. At both ends of the side plate 3, a second engaging groove 5 opened to the lower end surface in the height direction is formed with a depth dimension which is about half the height dimension of the side plate 3.

The end plate 2 and the side plate 3 have the same height and thickness, and the widths of the first and second engaging grooves 4 and 5 are the same as those of the end plate 2 and the side plate 3. It is set slightly larger than the thickness. The end plate 2 and the side plate 3 are assembled in a rectangular frame shape by engaging the first engaging groove 4 and the second engaging groove 5 formed at both ends in the longitudinal direction with each other. ing.

A first steadying member 7 is provided on the outer surface of the end plate 2 at the end side of the end portion where the first engagement groove 4 is formed. The first steady rest 7 is in the form of a prism having a length substantially the same as the height of the end plate 2, and intersects at a right angle as shown in FIGS. 6 (a) and 6 (b). It has a first side surface 7 a and a second side surface 7 b, and the first side surface 7 a is joined and fixed to the outer surface of the end plate 2.

The second side surface 7 of the first steady rest 7
b is oriented inward in the longitudinal direction of the end plate 2, and the end plate 2
When the second engaging groove 5 of the side plate 3 is engaged with the first engaging groove 4 of the side plate 3 of the side plate 3 protruding from the first engaging groove 4 to the outer surface side of the end plate 2. Face to face and make contact.

As a result, the end plate 2 and the side plate 3 are formed as shown in FIG.
And, as shown in FIG. 6B, the outer surface of these end portions is the first
Since the steady rest 7 is held in face-to-face contact with the first side face 7a and the second side face 7b of the steady rest 7,
The end plate 2 and the side plate 3 of the bed frame 1 assembled in the rectangular frame shape by engaging with the engaging groove 5 of are connected without rattling.

As shown in FIGS. 5 (a) and 5 (b),
An upper female screw 8a and a lower female screw 8b are embedded in the upper end face and the lower end face of the first steady rest 7, respectively, and a decorative body 10a is detachably attached to the upper female screw 8a. A caster 10b with a stopper may be detachably attached to 8b. That is, the first steady rest 7 can also be used as a place for attaching the ornament 10a and the casters 10b.

The side plate 3 is divided into two pieces 3a having the same length at a midway portion in the longitudinal direction, and the side plates 3 are connected by a connecting tool 9 so as to be disassembled. As shown in FIGS. 1 and 4, the connector 9 has a connecting plate 11 having a pair of through holes 11a formed therein and a pair of male threads 12 with knobs inserted into the through holes 11a of the connecting plate 11. However, a female thread 13 to which the male thread 12 can be screwed is provided at the divided end of the divided piece 3a.

Therefore, if a pair of divided pieces 3a are abutted and the male screw 12 of the connecting tool 9 is screwed into the female thread 13 at the end of the divided piece 3a via the connecting plate 11, the pair of divided pieces 3a will be formed. Can be linearly connected by the connecting plate 11.

In this embodiment, the length of the side plate 3 is set to be twice the length of the end plate 2. Therefore, if the side plate 3 is divided into a pair of divided pieces 3a, since these divided pieces 3a have the same length dimension as the end plate 2, it becomes possible to easily handle such as packing and carrying.

A pair of fitting holes 14 are formed in the end surfaces of the pair of divided pieces 3a to be joined, and connecting pins 15 are provided in these fitting holes 14 by fitting both ends thereof. . As a result, the pair of divided pieces 3a forming the side plate 3 are connected by the connecting plate 11 and the connecting pin 15. Moreover, since the pair of divided pieces 3a are connected by the connecting pin 15, even if the male screw 12 fixing the connecting plate 11 is loosened, the pair of divided pieces 3a is prevented from shifting.

On the inner surfaces of the pair of side plates 3, a receiving bar 16 which also functions as a second steadying member is provided over substantially the entire length of the side plates 3 except both ends in the longitudinal direction. Like the pair of divided pieces 3a of the side plate 3, the receiving bar 16 is divided at a midway portion in the longitudinal direction. Therefore, when the side plate 3 is divided into a pair of divided pieces 3a, the receiving bar 16 is also divided into the divided pieces 3a.
It can be divided with.

The surface of the receiving bar 16 joined to the inner surface of the side plate 3 is a first side surface 16a, and both end surfaces in the longitudinal direction are second side surfaces 16b. The end frame 2 and the side plate 3 are engaged with each other by engaging the engaging grooves 4 and 5 with each other.
When assembled, the second side surface 16b faces the inner surface of the end portion of the end plate 2 and is joined thereto.

As a result, the inner surfaces of the end portions of the end plate 2 and the side plate 3 are the first side surface 16a and the second side surface 16 of the receiving bar 16.
Since it is held by b, this also prevents the end plates 2 and the side plates 3 assembled in the bed frame 1 from rattling.

That is, the end plate 2 and the side plate 3 constituting the bed frame 1 have a rectangular frame shape without rattling by the first steadying member 7 and the receiving bar 16 as the second steadying member. Have been assembled into.

As shown in FIG. 1, locking holes 16c opening on the upper surface of the bed frame 1 are formed at the divided ends of the pair of left and right receiving bars 16 provided on the inner surfaces of the pair of side plates 3. It is formed at a corresponding position in the longitudinal direction. The left and right locking holes 16c are engaged with the locking portions 18 at both ends of the rod-shaped connecting rod 17 which are bent in an L shape. As a result, the bed frame 1 prevents the pair of side plates 3 from being curved and deformed along the width direction.

Receiving bar 16 provided on the pair of side plates 3
The floor board body 20 in the shape of a blind is supported by engaging both ends in the width direction. The floor plate body 20 includes a plurality of strips 21 as shown in FIGS. 1, 2 and 7A and 7B. The strip 21 has a hollow shape with an open lower surface, and reinforcing ribs (not shown) are provided inside in a grid pattern. The strip plate 21 is curved upward in a convex shape.

A bag member 22 formed of a synthetic resin in a box shape with one side open is attached to both ends of each strip 21. As shown in FIG. 7B, connecting pieces 23 each having an engaging hole 23a are projectingly provided on both end surfaces of the bag member 22 in the longitudinal direction, and one end is formed on a lower surface orthogonal to the end surface. A pair of strip-shaped elastic pieces 22a, which are connected to the lower surface and have a substantially eight shape, are integrally formed.

The strips 21 having the bag members 22 attached to both ends in the longitudinal direction are arranged at predetermined intervals, and the pair of adjacent bag members 22 attached to the ends of the strips 21 are connected to each other by the connecting member 24. It is rotatably connected by.

The connecting member 24 is a pair of plate members 24a, 2
It consists of 4b. One plate member 24a is provided with a pair of engagement pins 25 having conical tips and having engagement portions 25a formed by a slot groove so as to be elastically deformable in the radial direction. The other plate member 24b is formed with a pair of engagement holes 26 into which the engagement pins 25 can be inserted and locked.

Then, the pair of engaging pins 25 provided on the one plate member 24a are provided with the pair of bag members 22 adjacent to each other.
The engaging pin 25 protruding from the connecting piece 23 is inserted into the engaging hole 23a of the connecting piece 23 and the engaging hole 26 of the other plate member 24b.
And the engaging portion 25a at the tip of the engaging pin 25 is projected from the outer surface of the other plate member 24b, so that the pair of plate members 24a and 24b are rotatably connected to the connecting piece 23.

The floor plate body 20 having the above structure is elastic by engaging the bag members 22 provided at both ends in the longitudinal direction of the strip plate 21 with the receiving bars 16 through the elastic pieces 22a provided on the lower surface. Supported by. A mattress 28 is placed on the upper surface of the floor plate body 20 as shown by a chain line in FIGS. 2 and 4.

Leg members 31 are provided on the lower end surfaces of the pair of end plates 2 of the bed frame 1, and the side plates 3 are also provided.
The lower end portion in the height direction of the connecting plate 11 that connects the pair of divided pieces 3 a is projected from the lower end surface of the side plate 3 by a predetermined dimension.
The connecting plate 11 also serves as a leg member that supports the bed frame 1 at a predetermined height together with the leg member 31. Since the connecting plate 11 supports the connecting portion where the pair of divided pieces 3a of the side plate 3 are connected, the connecting strength of the pair of divided pieces 3a can be improved.

In the bed apparatus having the above structure, the bed frame 1 is composed of a pair of end plates 2 and side plates 3.
By engaging the first engagement groove 4 and the second engagement groove 5 formed at the ends of the side plate 3 and the side plate 3, it is possible to assemble into a rectangular frame shape.

On the outer surface of the end portion of the end plate 2 in the longitudinal direction, the first
The side faces 7a of the above are joined to provide the first steady rest 7. When the end plate 2 and the side plate 3 are assembled in a rectangular frame shape, the second side surface of the first steady rest 7 comes into face-to-face contact with the outer surface of the end portion of the side plate 3.

Therefore, the bed frame 1 assembled in the rectangular frame shape by engaging the engaging grooves 4 and 5 of the end plate 2 and the side plate 3 with each other is the outer surface of the end part of the end plate 2 and the side plate 3. Is the first side surface 7a and the second side surface 7b of the first steady rest 7
Since the first engagement groove 4 and the second engagement groove 5 are disengaged from each other, the end plate 2 and the side plate 3 are disengaged from each other even if the engagement state of the first engagement groove 4 and the second engagement groove 5 is distorted. Is prevented.

A receiving bar 16 is provided on the inner surface of the side plate 3 with its first side surface 14a joined thereto. When the end plate 2 and the side plate 3 are assembled in a rectangular frame shape by engaging the engaging grooves 4 and 5 with each other, the second side face 14b of both end faces of the receiving bar 16 is formed.
Makes face-to-face contact with the inner surface of the end portion of the end plate 2.

Therefore, in the bed frame 1, the inner surfaces of the end portions of the end plate 2 and the side plate 3 are held by the first side surface 14a and the second side surface 14b of the receiving bar 16.
This receiving bar 16 can also prevent the connection between the end plate 2 and the side plate 3 from rattling.

Thus, the bed frame 1 of the present invention
Is the first formed on the end portions of the end plate 2 and the side plate 3, respectively.
The first steady rest 7 provided on the outer surface of the end plate 2 has a simple structure in which the engaging groove 4 and the second engaging groove 5 are engaged with each other to assemble into a rectangular frame shape. And a receiving bar 16 provided on the inner surface of the side plate 3 as a second steady rest member.
With this, it is possible to reliably prevent rattling of the connecting portions of the end plates 2 and the side plates 3 which engage with each other in the engaging grooves 4 and 5.

Therefore, even when the bed frame 1 has a structure that can be easily disassembled and assembled, the strength at the time of assembly can be secured.

The side plate 3 can be divided into two pieces 3a, and these pieces 3a have substantially the same length as the end plate 2. Therefore, if the end plate 2 and the side plate 3 are disassembled and then the side plate 2 is divided, the end plate 2 and the divided piece 3a can be made to have substantially the same length, so that they can be easily handled.

Moreover, since the floor plate 20 is in the shape of a blindfold, it can be wound in a cylindrical shape when the bed frame 1 is disassembled so that it has substantially the same length as the end plate 2. Therefore, the rolled-up floor plate body 20 can be easily handled together with the end plate 2 and the divided pieces 3a.

FIG. 8 shows a second embodiment of the present invention. In this embodiment, the first steadying member 7 shown in the first embodiment is divided into two parts from the middle part in the longitudinal direction, and one of the divided members 71 is an outer surface of an end part of the end plate 2. The first side surface 7a is provided by being joined to the lower half in the height direction of the second side surface 7 and the other member 72 is provided on the upper half of the outer surface of the end portion of the side plate 3.
b is joined and provided.

As a result, the first engaging groove 4 and the second engaging groove 5 formed at the end portions of the end plate 2 and the side plate 3 are engaged with each other, and the end plate 2 and the side plate 3 are engaged with each other. , The second side surface 7b of the one member 71 comes into face-to-face contact with the outer surface of the end portion of the side plate 3, and the first side surface 7a of the other member 72 comes into face-contact with the outer surface of the end portion of the end plate 2. The end plate 2 and the side plate 3 are connected.

Moreover, since the upper end surface of the one member 71 and the lower end surface of the other member 72 are in contact with each other, the engaging depths of the first and second engaging grooves 4 and 5 can be maintained constant.

9 and 10 show a third embodiment of the present invention. In this embodiment, a pair of first steady members 7 are provided on the outer surface of the end portion of the end plate 2 with the first engaging groove 4 sandwiched between the first side surfaces 7a.

Therefore, the end plate 2 and the side plate 3 are connected to each other as shown in FIG.
When the engaging grooves 4 and 5 are engaged with each other as shown in FIG. 10B from the state of FIG. 10A, the pair of first steady rest members are formed on the outer surface and the inner surface of the end portion of the side plate 3. Since the second side face 7b of 7 comes into face-to-face contact, the end plate 2 and the side plate 3 can be connected more firmly.

The present invention is not limited to the above embodiments, and can be modified within the scope of the invention.

For example, the first steady rest is provided by joining the first side surface to the outer surface of the end portion of the end plate.
The first side surface may be joined to the outer surface of the end portion of the side plate.

Further, although the receiving bar for supporting the floor plate is also used as the second steadying member, a member having a first side surface and a second side surface different from the receiving bar is used as the inner surface of the end plate or the side plate. Alternatively, the first side surface may be joined and provided.

Further, in the above-described one embodiment, the bed frame is provided with the first steadying member and the second steadying member. It is possible to prevent the end plate and the side plate assembled by engaging the engaging groove from rattling.

[0059]

As described above, according to the present invention, the first side surface of the steady rest is joined to the side surface of at least one of the first member and the second member, and When the first member and the second member are assembled by engaging the mutual engagement grooves, the second side surface of the steady rest faces the side surface of the other member.

Therefore, the first part of the bed frame
Since the member and the second member can be assembled without rattling, the bed frame can have a simple and strong structure.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a bed apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of the bed device in an assembled state.

FIG. 3 is a plan view of a bed frame in which end plates and side plates are assembled.

FIG. 4 is a sectional view taken along the width direction of the bed frame.

5A is a perspective view of an end portion of a connected end plate and a side plate, and FIG. 5B is a cross-sectional view taken along the line AA of FIG. 5A.

FIG. 6 (a) is an exploded perspective view of the end portions of the end plate and the side plate,
(B) is a perspective view of the edge part of the connected end plate and side plate.

FIG. 7A is a side view showing a part of the floor plate body, and FIG. 7B is a plan view of one end portion in the width direction of the floor plate body.

FIG. 8 is an exploded perspective view of end portions of an end plate and a side plate according to a second embodiment of the present invention.

FIG. 9 is a plan view of a bed frame showing a second embodiment of the present invention.

10A is a perspective view of a disassembled state of an end portion of an end plate and a side plate of the bed frame shown in FIG. 9, and FIG. 10B is a perspective view of an assembled state.

[Explanation of symbols]

1 ... Bed frame 2 ... End plate 3 ... Side plate 4 ... First engaging groove 5 ... Second engaging groove 7 ... First steady member 7a ... 1st side 7b ... second side 16 ... Receiving bar (second steady rest) 16a ... 1st side 16b ... second side surface

Claims (7)

[Claims] 1. A bed apparatus having a bed frame in which a pair of strip-plate-shaped first members and second members are assembled in a rectangular frame shape, and an upper end in a height direction is provided at an end portion of the first member. A first engaging groove formed to be open to the upper end of the second member, and an opening formed to the lower end in the height direction at the end portion of the second member and engaging with the first engaging groove. It has the 2nd engaging groove which connects the 1st member and the 2nd member so that attachment or detachment is possible, the 1st side and the 2nd side, and the 1st side is the 1st above-mentioned member and the 1st. The second frame is joined to at least one side surface of the second member, and the first engagement groove and the second engagement groove are engaged with each other to connect the first member and the second member to each other. When assembled into a shape, the second side surface faces the side surface of the other member and prevents the connection state between the first member and the second member from rattling. A bed device comprising: a stop member. 2. The steady rest is provided by joining a first side surface to an outer surface of an end of either one of the first member and the second member, and the first member and the second member are provided. The bed device according to claim 1, wherein the second side surface faces the outer surface of the end portion of the other member by assembling the member and the member in a rectangular frame shape. 3. The steady rest is provided by joining a first side surface to an inner surface of either one of the first member and the second member, and the first steady member and the second member. The bed apparatus according to claim 1, wherein the second side surface faces the inner surface of the other member by assembling and in a rectangular frame shape. 4. The bed apparatus according to claim 3, wherein the steady rest member is a receiving bar that engages and supports both widthwise end portions of the floor plate member provided on the bed frame. 5. A bed apparatus having a bed frame in which a pair of end plates and a pair of side plates are assembled into a rectangular frame shape, and formed at both end portions of the end plates with one end face in the height direction opened. The first engaging groove and the end plate and the side plate are attached to and detached from each other by being formed at both end portions of the side plate so as to be open at one end face in the height direction and engaging with the first engaging groove. A second engaging groove that is operably connected, a first side surface and a second side surface, and is provided with one side surface joined to the outer surface of at least one of the end plate and the side plate. When the first engaging groove and the second engaging groove are engaged to assemble the end plate and the side plate into a rectangular frame shape, the second side surface faces the other side surface. When the end plate and the side plate, which are provided by joining one side surface to the inner surface of the member and the side plate, are assembled into a rectangular frame shape, A bed apparatus, comprising: a receiving bar whose end face in the hand direction faces the inner surface of the end plate and which prevents the connection state between the end plate and the side plate from rattling with the steady rest member. . 6. The bed apparatus according to claim 5, wherein each of the pair of side plates is divided into a pair of divided pieces at a midway portion in the longitudinal direction, and is separably connected by a connecting tool. 7. A pair of split pieces each have a fitting hole opened at a connecting end face, and each fitting hole has one end of a connecting pin when the pair of split pieces are connected by the connecting tool. The bed device according to claim 6, wherein the other end is fitted with each other.