JP3222226U - Bunk bed - Google Patents

Abstract

Even though it is a vertical ladder, it is possible to give a step that is easy to ascend and descend to each step, and as a result, for example, a child can slip his / her foot accidentally and reduce the possibility of falling from the ladder. I will provide a. In a bunk bed 10 in which a vertical ladder 13 in which a plurality of steps are arranged on a pair of left and right handrails is fixed between an upper bed portion 11 and a lower bed portion 12, each handrail 39 is directed upward. The grip portion was gradually inclined inward into the bed, and all the steps adjacent to the upper and lower sides were configured such that the lower step S1 protruded forward than the upper step S2. Thereby, although it is a vertical ladder, the level | step difference which is easy to go up and down can be provided to each step. [Selection] Figure 1

Description

  This invention relates to a bunk bed comprising an upper bed and a lower bed.

  2. Description of the Related Art Conventionally, a bunk bed provided with an upper bed and a lower bed has been known in order to effectively utilize a space such as a children's room. A ladder is used for going up and down to the upper bed part. In this ladder, there are an inclined ladder which can be detachably attached to the upper bed portion and a vertical ladder which is vertically fixed to the bed body.

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However, in the case of the former inclined forceps, the attachment is unstable because they are placed obliquely on the upper bed portion, and there is a risk that the forceps may be dislocated from the upper bed portion or come off.
In addition, since the inclined ladders are arranged in an inclined manner, the installation space of the ladders is increased, and the use space of the room is narrowed by that amount, which also hinders the passage.
In the case of the latter vertical ladder, steps having the same depth (width) are vertically aligned between the pair of left and right handrails, so it is difficult to secure a footing, and when a child goes up and down, it is erroneous There was also a risk that they would miss the step.

  Therefore, as a result of keen research, the inventor made a pair of left and right handrails with vertical grips fixed vertically to the bed, with the grip portion gradually inclined toward the inside of the bed toward the upper side, and all the steps If the step on the lower side of the adjacent step on the upper side protrudes in the forward direction, it is possible to attach a step that is easy to ascend to the step while being a vertical ladder, and all the problems described above are solved Found out and completed this invention.

  The present invention has been made in view of such problems, and while being vertical ladders, it is possible to provide steps that are easy to go up and down in each step, and as a result, for example, a child accidentally slipped his leg The purpose is to provide a bunk bed where the risk of falling from a ladder is reduced.

  The invention according to claim 1 is a bunk bed in which vertical ladders in which a plurality of steps are arranged on a pair of left and right handrails are fixed between an upper bed portion and a lower bed portion, each handrail is directed upward The grip portion is gradually inclined toward the inside of the bed toward the end, and all the steps adjacent above and below are characterized in that the step on the lower side of the step on the upper side protrudes forward. It is a bunk bed.

The term "bunk bed" as used herein refers to a so-called two-stage bottom (bed body) in which mattresses (including duvets) are not laid on the upper surfaces of the floor members of the upper and lower bed portions. It shall be. The upper and lower bed portions may or may not be separable from each other.
The bed size of the upper and lower beds is optional. For example, single size, semi-double size, double size, etc. may be used.
Materials such as the supporting frames, the floor members, the supporting legs and the vertical forceps which mainly constitute the bed are optional. For example, various trees (pine, beech, maple, hippo, cypress etc.), various metals (iron, stainless steel, aluminum alloy etc.), various plastics (FRP resin (fiber reinforced plastic), ABS resin, polyvinyl chloride resin , Polystyrene resin, etc.) can be adopted. However, wood materials can enrich children's sensibility by the warmth and feel of natural wood materials.

The vertical ladder is vertically fixed to the upper and lower bed portions. Therefore, the installation state is unstable as in the case of the inclined ladder which is erected obliquely, and there is no risk of being detached from the upper bed portion.
Here, “the grip of the handrail gradually inclines toward the inside of the bed as it goes upward” means that the position of the grip of the handrail is gradually inward of the bed from the lower end to the upper end of the handrail (bed Mean that it is inclined to the middle of In addition, it can be said that the handrail is in the form of downward spread, if you change the view of this.
The structure, shape, etc. of the grip portion of the handrail are not limited. For example, it may be the front edge portion of the handrail, or it may be a member elongated in the handrail length direction protruding from the outer surface or the inner surface of the handrail.
The inclination angle based on the vertical line of the grip portion of the handrail is arbitrary. For example, 2 degrees-20 degrees may be sufficient.
In addition, “all steps adjacent to the upper and lower sides have the leading edge of the lower step than the upper step protrude forward” means the width (depth) of the step in all steps. Regardless of which means that the leading edge (front end) of the adjacent lower step is disposed forward of the leading edge of the upper step. Therefore, the lowermost step projects most forward.

The number of steps is arbitrary as long as it is two or more. For example, three or four may be used.
The protrusion width (length b in FIG. 2) of the lower step (the front edge) relative to the upper step (the front edge) is arbitrary between vertically adjacent steps. However, in consideration of the ease of up and down movement of the vertical forceps and the installation space of the forceps, the protrusion width is 2 cm to 10 cm, preferably 3 cm to 8 cm.
Although the maximum length in the front-rear direction of the vertical ladder (the length in the depth direction of the lower end of the handrail, length e in Fig. 2) is arbitrary, stepped steps on all steps, installation space of the vertical ladder and 10 to 50 cm, preferably 15 to 30 cm. In addition, although the minimum length of the vertical ladder in the front-rear direction (the length in the depth direction of the upper end of the handrail, length d in Fig. 2) is arbitrary, 5 cm to 5 It is 12 cm, preferably 7 cm to 10 cm.

The invention according to claim 2 is the bunk bed according to claim 1, characterized in that the inclination angle of the grip portion of each handrail is 2 ° to 10 ° with reference to a vertical line.
When the inclination angle of the front edge of each handrail is less than 2 °, it is difficult to take a forwardly inclined posture that is easy to ascend by using a step-like step when going up the vertical ladder. In addition, if it exceeds 10 °, the installation space of the vertical insulator may be increased. The preferred inclination angle of each handrail is 3 ° to 5 ° with respect to the vertical.

  In the device according to claim 3, the vertical ladder has a width of 3 cm to 8 cm at which all the steps adjacent to the upper and lower sides project forward from the upper side step to the front of the lower side step. The length of the lower end of the handrail is 15 cm to 20 cm, the length of the upper end of the handrail is 7 cm to 10 cm, and the angle of inclination of the grip portion of each handrail is 3 ° to A bunk bed according to claim 1 or 2, characterized in that it is 5 °.

  In the device according to claim 4, the bunk bed is made of wood, and the upper bed portion and the lower bed portion connect a pair of left and right side frame members, a head side frame member and a foot side frame member in a rectangular frame shape A vertical frame, a floor member, and a pair of left and right receiving rails respectively fixed to the inner surfaces of the pair of left and right side frame members by a plurality of fixing members to support the floor member; Adjusting the height of each step such that the floor member of the upper bed portion is disposed at the uppermost step, and fixing the step to the left side surface or the right side surface of the bunk bed, at least the upper layer bed The crosspieces arranged in the side frame members on the vertical ladder side of the part are fixed to the corresponding side frame members by a staggering method in which the plurality of fixing members are alternately arranged vertically in the longitudinal direction of the crosspieces Claim 1 to claim characterized in that Of a bunk bed according to any one.

A support frame having a pair of left and right side frame members, a head side frame member and a foot side frame member, which constitute an upper bed portion, a floor member, and a pair of left and right receiving bars are each made of wood.
As the fixing member, for example, a nail or a screw can be adopted.
Here, “adjusting the height of each step so that the floor member of the upper bed portion is disposed at the uppermost step” means, for example, from a floor on which a bunk bed is installed. The height to the floor member of the upper bed portion is divided approximately equally (adjusted to be approximately equal), and by arranging steps at these divided height positions among the vertical ladders, as if ( The vertical ladder is configured so that the apparent top step (virtual step) becomes the floor member of the upper bed portion.
The point is that the floor of the upper bed portion is the same as in the case of a conventional vertical ladder in which steps of the same size are arranged in parallel at a predetermined pitch in the vertical direction on a pair of left and right handrails consisting of two square bars extending in the vertical direction. It means that it is configured such that the actual uppermost step is present at a position below the floor member, rather than the uppermost step being disposed at the height position of the member.

Therefore, it is also conceivable to remove the steps of the same height as the floor member of the upper bed portion from the vertical ladder of the conventional structure, and to make the lower step from the floor member as the uppermost step. However, the conventional vertical forceps do not have the step-like steps as in the present invention, but the steps of the same size are vertically arranged in parallel, and the general forceps go up while carrying the foot straight up. It is.
Therefore, if a step is removed from the conventional vertical ladder at the same height as the floor member of the upper bed part, the person who climbs this will be straight from the posture straightened up to lift the vertical ladder, the last leg It is necessary to operate in an unreasonable (unstable) posture of stepping up the handrail gripped with both hands and lifting it up to the upper surface of the floor member ahead, especially for children, with dangerous forceps May be used for

The “staggering method” is generally a fixing method that makes it difficult to break the base material by alternately hitting the fixing members such as nails and screws (screws) up and down.
Here, when the receiving bar on which the floor member is placed is fixed to the corresponding side frame material, the fixing members are alternately fixed upward and downward. For example, a nail, a screw, or the like can be adopted as the fixing member. The number of fixing members to be staggered may be one by one or plural.
In the upper bed portion, only the side frame members (the left side frame material or the right side frame material) disposed on the side to which the vertical ladder is fixed may be the receiving crosspieces to be staggered or may be both of them. Further, in the case where the receiving bars are also provided on the inner surfaces of the head side frame material and the foot side frame material, the fixing members may be provided in a staggered manner with respect to these receiving bars. From the viewpoint of the mounting strength of the floor member, it is preferable to stagger the receiving bars with respect to the left and right side frame members.
Further, in order to increase the strength of the receiving rail, it is preferable to use a thick wall.
Examples of the type of the floor member include, but are not limited to, a maple, plate materials and the like, but a maple is preferable from the viewpoint of air permeability.

In the bunk bed according to claim 5, in the support frame of the lower bed part, the entire lower edge is in contact with the floor surface, any one of claims 1 to 4 It is the bunk bed described.
The lower bed portion is configured such that the entire lower edge of the support frame contacts the floor surface on which the bunk bed is installed with substantially no gap.
In addition, in "contacting a floor surface" here, it is permitted that there is a gap of 5 mm or less between the support frame and the floor surface.

According to the bunk bed of the present invention, since the vertical ladder is vertically fixed to the bed main body, there is no possibility that the installation is unstable and it is not detached or deviated like an inclined ladder which is erected obliquely. As a result, for example, the concern that the child falls off the ladder can be reduced.
In particular, since the step-like step is arranged in the vertical ladder and the handgrip portion of each handrail is configured to be gradually inclined inward as going upward, the stairs while gripping the handgrip portion when ascending the vertical ladder By moving up the step, the center of gravity is inclined forward, and it is easy to take a forward inclination posture in which it is easy to ascend.
Furthermore, in all the steps straddled on each handrail, the leading edge of the step on the lower side of the leading edge of the upper side step protrudes to the front of the vertical forceps among the adjacent steps. Therefore, this vertical ladder has a plurality of steps arranged in a step-like manner, and it becomes easier to go up and down compared to the conventional vertical ladder in which the leading edge of each step is aligned. As a result, for example, even a child can lift the vertical forceps up and down easily and safely, so the child is less likely to slide and fall and get injured.

  In particular, according to the second aspect of the present invention, since the inclination angle of the front edge with respect to the vertical line of each handrail is 2 ° to 10 °, it is possible to obtain a step that is easy to go up and down in all steps. In addition, the installation space of the vertical ladder can be reduced.

Furthermore, according to the invention as set forth in claim 3, in all steps vertically adjacent to the vertical ladder, the lower step protrudes forward by 3 cm to 8 cm from the upper step, and the front and back of the lower end of each handrail The length of the direction is 15 cm to 20 cm, the length of the upper end of each handrail is 7 to 10 cm, and the angle of inclination of the front edge of each handrail is 3 ° to 5 ° based on the vertical line doing.
With this configuration, although the vertical ladder can be easily moved up and down, the length of the lower end of the handrail in the front-rear direction can be shortened, and the installation space of the vertical ladder can be reduced. As a result, when walking near the bunk bed, it is difficult for the vertical ladder to get in the way, and also the ease of gripping and the strength of the upper end of the handrail can be secured.

According to the invention of claim 4, the vertical ladder fixed to one of the left side and the right side of the bunk bed has the uppermost step and the floor member on the upper bed portion side arranged at the uppermost step. The height of each step is adjusted to be a virtual step. Therefore, for example, the last step when the user reaches the upper bed portion using the vertical forceps is to apply the substantially full weight of the user and to step on the end (virtual step) on the vertical forceps side of the floor member Become. Therefore, a large load (bending load) locally and repeatedly acts on the wooden support for supporting the vertical insulator side end of the floor member each time the user goes up to the upper bed portion, and the effect thereof is There is a risk of damage to the receiving block.
However, the crosspieces are fixed to the side frame members on the vertical forceps side in a state where the respective fixing members are slightly shifted up and down by adopting the staggering method. Therefore, its supporting strength is large compared to the case where the fixing members are arranged in a line in the longitudinal direction of the receiving member, which is a fixing method of the receiving member by a general fixing member, and such repeated load Even if it acts on the crosspiece of the crosspiece with the vertical forceps over a long period of time, there is little possibility that the receiving crosspiece is damaged or the like.

In particular, since the receiving block is made of wood as described above, in the case of the conventional product in which a plurality of fixing members are horizontally arranged in a line in the receiving block, a crack is generated in the horizontal (linear) direction along the grain of the receiving block. It is easy to occur.
That is, in the conventional case, since a plurality of fixing members are arranged in a line, when a load is repeatedly applied to the receiving frame, for example, a crack generated at a fixing portion of one fixing member propagates to another adjacent fixing member It becomes easy to do. Furthermore, there is a concern that the crack may spread to a distant fixing point due to the repeated load generated each time the vertical forceps are used thereafter.
On the other hand, in the invention of claim 4, since the receiving crosspiece is fixed to the side frame member on the vertical insulator side by thus staggering the plurality of fixing members, temporarily fixing one fixing member Even if a crack occurs at a point, the possibility of the crack propagating to the adjacent fixed point is reduced. As a result, the possibility of the floor member falling due to the crack is almost eliminated.

  Further, according to the invention as set forth in claim 5, the entire lower edge of the support frame of the lower bed portion contacts the floor surface without any substantial gap, so that dust and debris are less likely to be accumulated under the lower bed portion, Bed cleaning is easier.

BRIEF DESCRIPTION OF THE DRAWINGS It is whole perspective view of the bunk bed which concerns on Example 1 of this invention. It is a principal part expanded sectional view showing the fixed part of the perpendicular ladder of the bunk bed concerning Example 1 of the present invention. (A) is a principal part expansion perspective view which shows the state which fixed the crosspiece by the staggering method to the inner surface of the support frame of the bunk bed which concerns on Example 1 of this invention. (B) is a principal part expansion perspective view which shows the state which fixed the crosspiece to the inner surface of the support frame by the nailing method of the conventional method. It is a principal part expanded sectional view showing the fixed part of the vertical ladder of the bunk bed concerning prior art.

  Hereinafter, an embodiment of the present invention will be specifically described. Here, a wooden bunk bed for children is taken as an example. For convenience of explanation, the head direction of the bunk bed is X1, the foot direction is X2, the left direction is Y1, the right direction is Y2, the upper direction is Z1, and the lower direction is Z2. Do.

In FIG. 1, reference numeral 10 denotes a bunk bed according to the first embodiment of the present invention, and the bunk bed 10 is disposed between the upper bed 11 and the lower bed 12 each having a rectangular shape elongated in the X1-X2 direction. The vertical forceps 13 extending in the Z1-Z2 direction are fixed. These are made of pine.
These will be specifically described below.
The lower bed 12 has the same basic structure as the upper bed 11. Therefore, the upper bed 11 will be mainly described, and then the lower bed 12 will be supplemented. Further, the vertical forceps 13 are fixed in a vertical state between intermediate portions in the X1-X2 direction in the Y2 side surface (right side surface) of the upper and lower bed portions 11 and 12.

As shown in FIGS. 1 to 3, the upper bed portion 11 includes four rectangular floor members 14 long in the X1-X2 direction on which a mattress (not shown) is placed, a support frame 15 for supporting the floor members 14, and It has a support leg 16.
The floor member 14 is composed of a head-side cocoon 17A constituting a half on the Y1 side and a foot-side cocoon 17B constituting a half on the Y2 side. Each of the cocoons 17A and 17B extends in the Y1-Y2 direction, and is provided with six base plates 18 of square bars separated by a predetermined pitch in the X1-X2 direction, and X1-fixed to the upper surface of each base plate 18 in a grid shape. It has eight cross plates 19 extending in the X2 direction and spaced apart in the Y1-Y2 direction. These lateral plates 19 constitute an upper surface on which the mattresses of the baby lions 17A and 17B are placed.

The support frame 15 is formed by connecting the left side frame member 20A, the right side frame member 20B, the head side frame member 21 and the foot side frame member 22 in a rectangular frame shape in plan view.
In the vicinity of each lower end of the inner surface (bed inner surface, Y1 side surface) of the left and right frame members 20A and 20B, the end portion of the floor member 14 on the Y1-Y2 side, specifically, A pair of left and right receiving bars 23 that respectively support the end portions on the Y1-Y2 side of the bottom plate 18 among the two scoops 17A and 17B are fixed using a plurality of screws (fixing members) 24.
Each receiving block 23 is a pine bar which is long in the X1-X2 direction, and each thickness (width) increases the strength of the receiving block 23, the conventional product shown in FIG. 3 (b) and FIG. The thickness is about twice (for example, 4.5 cm) as compared with the 5 cm receiving rail 23A.
Further, each receiving block 23 is fixed to the corresponding side frame members 20A and 20B by a staggering method in which a plurality of screws (fixing members) 24 are driven alternately in the vertical direction of the receiving block 23 (see FIG. 3 (a)).

Further, as shown in FIG. 1 and FIG. 2, four support legs 16 are respectively fixed to the four corners of the support frame 15 in a state where the upper portions thereof are disposed above the upper surface of the support frame 15.
A head fence (fence on the head side) 25 is laid across between the upper portions of the two support legs 16 on the head side among the adjacent support legs 16. Further, a foot fence (fence on the foot side) 26 is laid between the upper portions of the two support legs 16 on the foot side. Furthermore, the left fence (left fence) 27 is laid between the upper parts of the left two support legs 16, and the light fence (right fence) 28 is between the upper parts of each light support leg 16 Is laid across. The left fence 27 and the light fence 28 are connected to the corresponding side frame members 20A and 20B.

  Among them, the head fence 25 and the foot fence 26 extend in the Y1-Y2 direction and have two horizontal fences 29 separated from each other in the Z1-Z2 direction. The horizontal fence 29 on the upper side of the head fence 25 is a shelf 30 which is bent in an L shape from the lower edge toward the inside of the bed. The shelf unit 30 can be used as a portable terminal such as a smartphone or a tablet, or as a temporary storage place such as a book. On the other hand, on the surface on the X2 side of the horizontal fence 29 on the upper side of the foot fence 26, a total of three small object hooks 31 project at a predetermined pitch in the Y1-Y2 direction. In addition, if the thing of the lower bed part 12 is included, it will be a total of six. Of course, small clothes hangers 31 such as clothes may be disposed on the head fences 25 of the upper and lower bed portions 11 and 12, respectively.

The left fence (left fence) 27 has a left-side rectangular frame 32 long in the X1-X2 direction. In the left rectangular frame 32, two middle vertical frames 33 arranged in parallel to each other are disposed at an intermediate portion in the width (height) direction. Further, the left-side rectangular frame 32 has upper and lower partition fences 34 long in the X1-X2 direction that divides the inner space on the X1 side and the inner space on the X2 side partitioned by the intermediate vertical frame 33 into upper and lower sides. .
The light fence (right fence) 28 has an entrance 35 at the upper bed portion 11 side of the vertical insulator 13 at an intermediate portion in the X1-X2 direction. Therefore, the light fence 28 is divided into two parts, the head-side partial rectangular frame 36 on the X1 side and the foot-side partial rectangular frame 37 on the X2 side having the same shape.
Each of the partial rectangular frames 36 and 37 is a rectangular frame long in the X1-X2 direction, and the inner space of these partial rectangular frames 36 and 37 is two horizontally-long middle intermediate fences 38 disposed in the middle part in the respective width (Z1-Z2) directions. Are divided up and down respectively.

The vertical frame material 50 on the X1 side of the head side partial rectangular frame 36 on the X1 side makes surface contact with the leg 16 on the X1-Y2 side, and the vertical frame material 51 on the X2 side of the head side partial rectangular frame 37 on the X2 side , X2-Y2 side of the support leg 16 in surface contact. Thereby, the rigidity of the light fence 28 is enhanced as compared with the conventional product in which a gap is formed between each vertical frame member and each leg, and the swing of the light fence 28 is prevented when the upper bed portion 11 is used. it can. Further, for the left fence 27 as well, the vertical frame material 52 on the X1 side makes surface contact with the support leg 16 on the X1-Y1 side, and the vertical frame material 53 on the X2 side and the support leg 16 on the X2-Y1 side It is in surface contact.
The height of each fence 25-28 is 36 cm, which is higher than a typical 25 cm. This is to make it difficult for the child to fall when turning over on the upper bed portion 11.

Next, as shown in FIGS. 1 and 2, the lower bed unit 12 will be described. As described above, only differences from the upper bed portion 11 will be described here.
In the lower bed section 12, the left fence 27 and the light fence 28 arranged in the upper bed section 11 are omitted. Therefore, the child can freely enter and exit from the release surface on the Y1-Y2 side of the lower bed portion 12.
Further, the head fence 25 and the foot fence 26 of the lower bed portion 12 have three horizontal rails 29.
The entire lower edge of the support frame 15 of the lower bed portion 12 is in contact with the floor surface.
The other configuration is substantially the same as the upper bed portion 11.

Next, the vertical forceps 13 will be described in detail with reference to FIGS. 1 to 3.
As shown in FIG. 1 and FIG. 2, the vertical forceps 13 has two steps S 1 and S 2 arranged on the left and right handrails 39.
Hereinafter, these components will be specifically described.
Each handrail 39 is a thick plate whose edge surface (rear edge surface) on the Y1 side is a vertical surface, and a trapezoidal pine plate in which the grip portion (front portion) gradually inclines inward of the bed toward the upper side It consists of The edge on the Y1 side of the lower end portion of these handrails 39 is fixed to the outer surface of the middle portion in the length direction of the right side frame member 20B of the lower bed portion 12. On the other hand, the edge on the Y1 side of the upper portion of each handrail 39 is fixed to the outer surface of the middle portion in the length direction of the right side frame member 20B of the upper bed 11, and the head side portion of the upper bed 11 It is fixed to the outer surface of the end by the side of X2 among rectangular frames 36, and the outer surface of the end by the side of X1 among the foot side partial rectangular frames 37 of upper row bed part 11, respectively.

Each trapezoidal handrail 39 has a height (length in the Z1-Z2 direction) of 130 cm, a length d on the upper side (upper end) of 9 cm, a length e on the bottom side (lower end) of 18 cm, and a length between handrails 36 cm, 2.4 cm in thickness (see FIG. 2). The inclination angle θ of the front edge (the edge on the Y2 side) of the grip portion 39a of each handrail 39 with reference to the vertical line a is 4 °.
At upper end portions of these handrails 39, grip portions 43 each having a vertically elongated long hole 42 are disposed.
In addition to the steps S1 and S2, the step of the vertical forceps 13 is a three-step including the uppermost virtual step S3 disposed at the end (outlet 35) of the floor member 14 of the upper bed 11 on the Y2 side. It is of the formula. Specifically, the height from the floor surface on which the bunk bed 10 is installed to the floor member 14 of the upper bed portion 11 is roughly divided into three equal parts (c1 to c3), and these divisions among the vertical forceps 13 Steps S1 to S3 are arranged one by one at each of the height positions.

The first step S1 has a length (length in the X1-X2 direction) of 36 cm, a depth length (Y1-Y2 length) of 11.5 cm, and a thickness of 2.4 cm.
The second step S2 has a length (length in the X1-X2 direction) of 36 cm, a depth length (Y1-Y2 length) of 9 cm, and a thickness of 2.4 cm.

Furthermore, of the steps adjacent vertically, the front edge of step S1 of the first step protrudes forward (Y2 direction) from the front edge of step S2 of the second step by a length b (see FIG. 2). reference). The length b here is 4.5 cm.
The front edge of the first step S1 is disposed near the front edge of the grip portion 39a of each handrail 39, and the rear edge of the second step S2 is disposed near the rear edge of each handrail 39. It is done. Thus, although the length e in the front-rear direction of the lower end of the handrail 39 is as short as 18 cm, the width (length) in which the front edge of the step S1 on the lower side is projected forward from the front edge of the step S2 on the upper side B) can be 4.5 cm. As a result, it is possible to secure a level difference in which the vertical forceps 13 can easily go up and down.

Next, a method of using the bunk bed 10 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. Here, it is assumed that two children use the upper bed 11 and the lower bed 12 one by one.
As shown in FIGS. 1 to 3, first, mattresses (not shown) are laid on the upper surfaces of the upper and lower floor members 14.
Thereafter, for example, when the first child uses the lower bed portion 12, the child enters the lower bed portion 12. That is, since there is no left fence 27 and light fence 28 in the lower bed 12, the first child freely enters and exits the lower bed 12 from the release surfaces on the Y1 and Y2 sides of the lower bed 12. be able to.

When the second child uses the upper bed portion 11, first, the child climbs to the upper bed portion 11 using the vertical forceps 13.
At this time, since the vertical forceps 13 are vertically fixed to the right side surface of the bunk bed 10, there is a possibility that the installation may be unstable, and may be detached or shifted as in the case of the conventional inclined forceps which are inclined. Absent. As a result, the concern that the second child falls off the vertical forceps 13 is reduced.
Further, the vertical forceps 13 configure the pair of left and right handrails 39 such that the grip portion 39a gradually inclines inward of the bed as it goes upward. Therefore, unlike the case of the conventional vertical forceps 13A having the same width over the entire length, when the vertical forceps 13 ascends, the center of gravity is inclined forward by moving up the step-like steps S1 to S3 while grasping this grip portion It becomes an inclined posture), and it becomes easy to go up (see FIG. 4).

Furthermore, here, as shown in FIG. 2, the inclination angle θ of the front edge of the grip portion 39 a of each handrail 39 with respect to the vertical line a is 4 °. As a result, it is possible to make steps easy to go up and down in all the steps S1 to S3, and the installation space of the vertical insulator 13 also becomes smaller.
Furthermore, in all the steps S1 to S3, for example, the steps on the lower side of the steps on the upper side adjacent to each other protrude forward of the vertical forceps 13. That is, the front edge of the first step S1 protrudes by 4.5 cm from the front edge of the second step S2. Therefore, this vertical forceps 13 has three steps S1 to S3 arranged in a step-like manner.
Therefore, as shown in FIG. 4, the vertical forceps 13 of the first embodiment is up compared to the conventional vertical forceps 13A in which the handrail 39A has a uniform thickness from the upper stage to the lower stage and the front edge of each step SA is even. It becomes easy to go down. As a result, even the child can lift the vertical forceps 13 up and down easily and safely, and there is little risk of the child slipping and falling and getting injured.

Here, the vertical insulator 13 fixed to the right side surface of the bunk bed 10 is high in steps S1 to S3 so that the uppermost virtual step S3 is the floor member 14 on the upper bed portion 11 side. It has been adjusted. That is, in each of the steps S1 to S3, one of the vertical ladders 13 is disposed at each height position obtained by dividing the height from the floor surface to the floor member 14 of the upper bed portion 11 into approximately three equal parts ( See c1 to c3 in FIG.
Therefore, when the second child climbs the vertical forceps 13 and reaches the upper bed portion 11, the last step is the end of the floor member 14 on the vertical forceps 13 side with the entire weight of the child being applied. Step on (the end on the Y2 side). As a result, each time the child climbs on the upper bed portion 11, a portion that becomes the virtual step S3 of the uppermost step is received by the horizontally long pine-made support bar 23 that supports the end portion of the floor member 14 on the vertical forceps 13 side. A large repetitive load (bending load) acts on (portion of the entrance 35), and there is a possibility that the receiving crosspiece 23 may be damaged.

  However, in the first embodiment, the receiving member 23 is fixed to the right side frame member 20B on the side of the vertical forceps 13 in a state in which the plurality of screws 24 are alternately staggered vertically by the zigzag method. Therefore, compared with the case where each screw 24 is arranged in a line in the longitudinal direction of the receiving bar 23A, which is the fixing method of the receiving bar 23A by the conventional screw 24 (see FIG. 3B), its supporting strength is Even if such repeated load acts on the portion of the receiving bar 23 facing the vertical insulator 13 for a long period of time, there is little possibility that the receiving bar 23 may be damaged or the like (see FIG. 3A). ).

In particular, in the case of a conventional product in which a plurality of screws 24 are horizontally arranged in a row in the receiving bar 23A because the receiving bar 23 is thus wooden, the horizontal (linear) direction along the grain of the receiving bar 23A The crack C is likely to occur in (see FIG. 3 (b)).
That is, in the conventional case, due to the plurality of screws 24 being arranged in a line, the repeated load acts on the receiving crosspiece 23A, and the cracks C generated at the fixing points of one screw 24 are adjacent to each other. It is feared that the crack C may be spread to a distant fixed point by the repeated load which is transmitted to the screw 24 and then generated every time the vertical forceps 13A is used.

On the other hand, in the first embodiment shown in FIG. 3A, since the crosspieces 23 are fixed to the inner surface of the right side frame member 20 by thus staggering the plurality of screws 24, one temporary Even if the crack C1 is generated at the fixed portion (implanted portion) of the screw 24, there is almost no possibility that the crack C1 will sequentially propagate to another adjacent fixed portion. As a result, there is almost no risk of a fall accident of the floor member 14 caused by the crack C1. In addition, it is preferable to give this staggering of the screw 24 to the receiving bar 23 of the left side frame member 20A.
In addition, since the entire lower edge of the support frame 15 of the lower bed portion 12 is brought into contact with the floor with substantially no space here, dust and dirt are less likely to be accumulated under the lower bed portion 12, and the bunk bed 10 is cleaned Becomes easy.

  This invention is useful as a bunk bed technology with vertical ladders.

10 Bunk bed 11 Upper bed 12 Lower bed 13 Vertical insulator 14 Floor member 15 Support frame 20A Left side frame member 20B Right side frame member 21 Head side frame member 22 Foot side frame member 23 Receiving part 24 Screw (fixed member)
39 handrail 39a hand grip part S1, S2 step S3 virtual step a vertical line θ inclination angle

Claims (5)

In a bunk bed in which vertical ladders having a plurality of steps arranged on a pair of left and right handrails are fixed between an upper bed and a lower bed,
In each handrail, the grip portion gradually inclines inward of the bed as it goes upward,
2. A bunk bed characterized in that all the steps adjacent to the upper and lower sides are projecting forward in the step on the lower side than the step on the upper side.   The bunk bed according to claim 1, wherein the inclination angle of the grip portion of each handrail is 2 ° to 10 ° with respect to a vertical line. The vertical ladder is
All steps adjacent to the upper and lower sides have a width of 3 cm to 8 cm projecting forward of the lower step from the upper step.
The length of the lower end of each handrail in the front-rear direction is 15 cm to 20 cm,
The length of the upper end of each handrail in the front-rear direction is 7 cm to 10 cm,
The bunk bed according to claim 1 or 2, wherein an inclination angle of a grip portion of each handrail is 3 to 5 degrees with reference to a vertical line. The bunk beds are wooden,
The upper bed portion and the lower bed portion are a support frame obtained by connecting a pair of left and right side frame members, a head side frame member and a foot side frame member in a rectangular frame shape, a floor member, and the pair of left and right side frame members. A pair of left and right receiving bars each fixed on the inner surface by a plurality of fixing members and supporting the floor member;
The vertical ladder is fixed to the left side surface or the right side surface of the bunk bed by adjusting the height of each step so as to be a virtual step in which the floor member of the upper bed portion is disposed at the top.
At least the receiving bars disposed in the side frame members on the vertical ladder side of the upper bed portion correspond to the corresponding sides by a staggering method in which the plurality of fixing members are alternately arranged in the vertical direction of the receiving bars. The bunk bed according to any one of claims 1 to 3, wherein the bunk bed is fixed to a frame member.   The two-bed bed according to any one of claims 1 to 4, wherein the entire lower edge of the support frame of the lower bed portion is in contact with the floor surface.

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