JP2017018528A - Knockdown chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of improving manufacturability and assemblability in a knockdown chair.SOLUTION: In a pair of leg parts 20, 20, a linear groove 26 is formed with which a seat part 12 is engaged. Also, both end faces 30a, 30a of a connection beam part 30 are structured in a nearly truncated chevron shape. Then, with the pair of leg parts 20, 20 temporarily tacked on the connection beam part 30 with a bolt member 50, when the seat part 12 is made to slide in the linear groove 26 and the slide of the seat part 12 is regulated by a regulation member 40, the bolt member 50 is permanently fastened to complete the assembly of the knockdown chair 1. Here, by friction which is caused on account of the upper and lower faces of the linear groove 26 being pressed to the seat part 12, with the pair of leg parts 20, 20 nearly in the truncated chevron shape, and by action of the regulation member 40, the seat part 12 is prevented from falling out from the pair of leg parts 20, 20. Consequently, the bolt member for tightening the seat part 12 to the pair of leg parts 20, 20 is dispensed with.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an assembling chair that can be assembled.

  Japanese Utility Model Laid-Open No. 5-24092 (Patent Document 1) includes a seat portion configured in a flat plate shape and a pair of leg portions configured in a flat plate shape and configured to support the seat portion. A prefabricated chair is described. In the assembly-type chair, two bolts are integrally formed in a protruding manner on each of the pair of side surfaces of the seat portion, and an insertion hole through which the bolt can be inserted is formed in each pair of leg portions. The chair can be assembled simply by assembling the seat portion to the leg portion so as to be inserted through the insertion hole and screwing the nut onto the bolt protruding from the insertion hole.

Japanese Utility Model Publication No. 5-24092

  However, in the assembly-type chair described in the above-mentioned publication, two bolts need to be erected on each side surface of the seat portion, and there is still room for improvement in terms of manufacturability. Further, it is necessary to screw nuts onto at least four bolts, and there is still room for improvement from the viewpoint of assembly.

  The present invention has been made in view of the above, and an object of the present invention is to provide a technique capable of improving manufacturability and assemblability in an assembly-type chair.

  In order to achieve the above-mentioned object, the assembly type chair of the present invention employs the following means.

  According to the preferable form of the assembly-type chair which concerns on this invention, the assembly-type chair which can be assembled is comprised. The assembly-type chair includes a seat portion configured in a flat plate shape, a pair of leg portions configured in a flat plate shape and configured to support the seat portion, and a pair of leg portions below the seat portion. The connecting beam part comprised so that it may connect, and the fastening member for fastening a pair of leg part to a connecting beam part is provided. Each of the pair of leg portions has a groove capable of engaging the seat portion. And the connecting beam part is a pair of leg parts as it goes from the lower end part that is the end part on the grounding side of the pair of leg parts to the upper end part of the pair of leg parts that is the end part opposite to the lower end part. The pair of legs are connected in such a manner that the distance between them is gradually reduced.

  According to the present invention, the seat is engaged with and supported by the grooves of the pair of legs, and the pair of legs is coupled by the fastening member in a state where the seat is sandwiched between the pairs of legs. Because it is configured to be fastened to the beam, there is no need to stand two bolts on each side of the seat as in the past, and there is no need to screw nuts on a total of four bolts. And assembly can be improved.

  In addition, since the pair of leg portions are configured to be fastened to the connecting beam portion in an approximately eight-letter shape, the upper and lower surfaces of the grooves of the pair of leg portions are pressed against the upper and lower surfaces of the seat portion, A large friction is generated when moving in the extending direction of the groove. Thereby, it can suppress favorably that a seat part moves to the extension direction of a groove | channel, and can suppress the omission of a seat part.

  In addition, since it is the structure by which a pair of leg part is fastened by the connection beam part in the shape of an approximately eight, when stacking an assembly-type chair, it can be stacked in the state where a part of each assembly-type chair overlapped. . Thereby, the space required at the time of accommodation can be reduced.

  According to the further form of the assembly-type chair which concerns on this invention, it has further provided the control member which controls that a seat part moves to the extension direction of a groove | channel.

  According to this form, it can prevent reliably that a seat part moves to the extension direction of a groove | channel. Thereby, it is possible to reliably prevent the seat portion from coming off.

  According to the further form of the assembly-type chair which concerns on this invention, the seat part has a recessed part in the position facing a connection beam part. The regulating member is configured to bias the pin member so that the pin member can be projected and retracted in the connecting beam portion and to maintain the state in which the pin member protrudes from the connecting beam portion. And an elastic member. The seat member is restricted from moving in the extending direction of the groove by engaging the pin member with the recess.

  According to this embodiment, the restricting member can be realized with a simple configuration.

  According to the further form of the assembly-type chair which concerns on this invention, the concave notch is comprised in the upper end part of a pair of leg part. And the connection beam part is comprised so that the surface on the opposite side to the surface which opposes a seat part may have a shape corresponding to a notch.

  According to this embodiment, when assembling the assembly-type chairs, the assembly-type chairs can be stacked in an appropriate positional relationship by aligning the connecting beam portions and the notches of the pair of leg portions. Thereby, the stability at the time of stacking can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, in an assembly-type chair, improvement of manufacturability and assembly property can be aimed at.

It is a perspective lineblock diagram showing the outline of the composition of assembling-type chair 1 concerning an embodiment of the invention. It is the front view which looked at the assembly-type chair 1 which concerns on embodiment of this invention from the front. It is the front view which looked at the main-body part 10 from the front. It is the side view which looked at the main-body part 10 from the side surface. It is the front view which looked at the leg part 20 from the front. It is the back view which looked at the leg part 20 from the back surface. It is the elements on larger scale which looked at FIG. 6 from the arrow A direction. It is the front view which looked at the connection beam part 30 from the front. It is the side view which looked at the connection beam part 30 from the side surface. 3 is a configuration diagram showing a configuration of a regulating member 40. FIG. It is explanatory drawing which shows a mode that a pair of leg part 20 is fastened by the connection beam part 30. FIG. It is explanatory drawing which shows the state of the seat part 12 at the time of a pair of leg part 20 being fastened by the connection beam part 30, and the linear groove | channel 26. FIG. It is explanatory drawing which shows a mode that multiple assembly-type chairs 1 concerning the embodiment of the present invention were piled up.

  Next, the best mode for carrying out the present invention will be described using examples.

  As shown in FIGS. 1 and 2, the assembly-type chair 1 according to the embodiment of the present invention includes a main body 10 and a pair of legs 20 and 20 configured to support the main body 10. A connecting beam portion 30 configured to connect the pair of leg portions 20, 20, a bolt member 50 for fastening the pair of leg portions 20, 20 to the connecting beam portion 30, a pair of leg portions 20, And a restricting member 40 that restricts the main body 10 from slipping out of the body 20.

  The main body portion 10 is formed of plywood. As shown in FIGS. 1 to 4, the main body portion 10 includes a seat portion 12 and a backrest portion 14 that is integrally bent substantially perpendicularly to the seat portion 12. It is configured. As shown in FIGS. 3 and 4, a recess 12 a is formed in the substantially central portion of the back surface of the seat portion 12.

  A pair of leg parts 20 and 20 are fabricated by plywood, and have the same shape. Specifically, as shown in FIG. 5, the pair of leg portions 20, 20 includes a pair of grounding portions 22, 22 that are grounded to the ground, and an armrest portion 24 on which the user can place an elbow. And is configured as a substantially A-shaped flat plate in front view.

  As shown in FIG. 5, the armrest 24 is formed with a laterally long (long in the left-right direction in FIG. 5) opening 24 a and a through hole 24 b into which the bolt member 50 can be inserted. Moreover, as shown in FIG. 6, the linear groove 26 and the bottomed recessed part 24d are formed in the inner surface which becomes the side (side where a seat part is arrange | positioned) among the armrest parts 24. Yes. A concave notch 24 c is formed on the upper end surface of the armrest 24.

  As shown in FIG. 6, the straight groove 26 is disposed between the opening 24 a and the through hole 24 b so as to cross the armrest portion 24 from the one grounding portion 22 side to the other grounding portion 22. It is extended. As shown in FIG. 7, the linear groove 26 has a U-shaped cross section perpendicular to the extending direction. The width h of the straight groove 26 is formed to be substantially the same as or slightly larger than the thickness t of the seat portion 12.

  The connecting beam portion 30 is configured as a beam member formed of plywood, and is formed in a substantially trapezoidal shape when viewed from the front, as shown in FIG. That is, the connecting beam portion 30 is configured such that both end faces 30a, 30a constituting end portions in the longitudinal direction are substantially C-shaped. An angle θ formed by both end faces 30a, 30a of the connecting beam portion 30 and a virtual straight line VL extending in the vertical direction is set to 7 °, for example.

  Also, bottomed holes 32 and 34 are formed in both end faces 30a and 30a in the longitudinal direction of the connecting beam portion 30, as shown in FIGS. The bottomed holes 32 and 34 are formed in a direction perpendicular to both end faces 30a and 30a. A bottomed hole 32 is formed near the upper end surface 30 c of the connecting beam portion 30, and a bottomed hole 34 is formed near the lower end surface 30 b of the connecting beam portion 30.

  Further, a bottomed hole 36 is formed in the main surface 30d of the connecting beam portion 30 as shown in FIGS. The bottomed hole 36 is formed so as to penetrate the bottomed hole 32. As shown in FIGS. 2 and 11, a nut member 80 having a cylindrical shape is installed in the bottomed hole 36.

  Further, as shown in FIG. 8, a through-hole 38 penetrating from the upper end surface 30c to the lower end surface 30b is formed at a substantially central portion in the longitudinal direction of the connecting beam portion 30 (left and right direction in FIG. 8). The through-hole 38 is formed as a stepped hole having a large-diameter hole 38a formed near the upper end surface 30c and a small-diameter hole 38b formed near the lower end surface 30b.

  As shown in FIG. 9, the lower end surface 30 b of the connecting beam portion 30 is formed such that a cross-sectional shape perpendicular to the longitudinal direction of the connecting beam portion 30 has a substantially arc shape. As shown in FIG. 8, the lower end surface 30 b is formed so as to have a substantially arch-shaped recess 31 at a substantially central portion in the longitudinal direction (left and right direction in FIG. 8) of the connecting beam portion 30.

  As shown in FIG. 10, the regulating member 40 includes a stopper pin 42, a coil spring 44, and a handle 46. The stopper pin 42 includes a pin portion 42a, a shaft portion 42b, and a male screw portion 42c.

  The outer diameter of the pin portion 42 a is set to be slightly larger than the inner diameter of the concave portion 12 a of the seat portion 12 and the large diameter hole 38 a of the connecting beam portion 30. The outer diameter of the shaft portion 42 b is set to be slightly smaller than the inner diameter of the small diameter hole 38 b of the connecting beam portion 30. That is, the outer diameter of the shaft portion 42b is smaller than the outer shape of the pin portion 42a.

  The inner diameter of the coil spring 44 is formed larger than the outer diameter of the shaft portion 42 b of the stopper pin 42. The outer diameter of the coil spring 44 is set to be smaller than the inner diameter of the large-diameter hole 38 a of the connecting beam portion 30 and larger than the small-diameter hole 38 b of the connecting beam portion 30.

  The handle 46 has a female screw portion inside. The female screw portion is configured to be screw-engageable with the male screw portion 42c of the stopper pin 42.

  Next, an assembling method of the assembling chair configured as described above will be described. First, the regulating member 40 is assembled to the connecting beam portion 30 and the dowels 70 are fitted into the bottomed holes 34 and 34 of the both end faces 30a and 30a of the connecting beam portion 30 as shown in FIG.

  For assembling the restricting member 40 to the connecting beam portion 30, the coil spring 44 is first set in the large-diameter hole 38 a of the connecting beam portion 30, and then the stopper pin 42 is passed through the inside of the coil spring 44. The large-diameter hole 38a and the small-diameter hole 38b are inserted in this order from the threaded portion 42c into the through-hole 38 of the connecting beam portion 30, and finally, the handle 46 is inserted into the male screw portion 42c protruding from the small-diameter hole 38b of the connecting beam portion 30. This is done by screw engagement.

  Here, in a state where the regulating member 40 is assembled to the connecting beam portion 30, the coil spring 44 is compressed between the stepped portion of the through hole 38 of the connecting beam portion 30 and the pin portion 42 a of the stopper pin 42. For this reason, the spring force of the coil spring 44 acts on the stopper pin 42 so as to maintain the pin portion 42 a protruding from the upper end surface 30 c of the connecting beam portion 30.

  Next, as shown in FIG. 11, the pair of leg portions 20, 20 is connected to both end surfaces of the connecting beam portion 30 so that the dowels 70, 70 are fitted in the bottomed recesses 24 d, 24 d of the pair of leg portions 20, 20. Assemble to 30a, 30a. 2 and 11, the nut member 80 is set in the bottomed hole 36 of the connecting leg 30 and the bolt member 50 is connected to the connecting beam from the through holes 24b, 24b of the pair of legs 20, 20. The bolt member 50 is inserted into the bottomed holes 32 and 32 formed in the both end faces 30 a and 30 a of the portion 30 and temporarily tightened to the nut member 80.

  In this state, as shown in FIG. 12, the seat 12 is engaged with the straight grooves 26 and 26 of the pair of legs 20 and 20, and is slid in the extending direction of the straight grooves 26 and 26. The seat portion 12 is installed between the leg portions 20 and 20. Here, the sliding of the seat portion 12 in the straight grooves 26 and 26 is performed until the pin portion 42a of the restricting member 40 engages with the concave portion 12a of the seat portion 12 as shown in FIG. By engaging the pin part 42a with the recessed part 12a, the main body part 10 including the seat part 12 can be reliably prevented from coming out of the pair of leg parts 20 and 20.

  Subsequently, the bolt member 50 is finally tightened. By performing the final tightening of the bolt member 50, the pair of leg portions 20 and 20 come into contact with the both end faces 30a and 30a of the connecting beam portion 30, and the pair of leg portions 20 and 20 are substantially separated from each other as shown in FIG. It becomes a letter shape. At this time, the upper surface 26 a and the lower surface 26 b of the linear groove 26 are pressed against the upper surface 12 b and the lower surface 12 c of the seat portion 12. As a result, a large friction is generated when the seat portion 12 is about to move in the extending direction of the linear groove 26, so that the seat portion 12 can be well suppressed from sliding in the linear groove 26. .

  Moreover, since a pair of leg parts 20 and 20 are substantially C-shaped, as shown in FIG. 13, when stacking a plurality of assembly-type chairs 1 on the upper side, a part of each assembly-type chair 1 is. They can be stacked in an overlapping state, and the storage space can be reduced. When another assembly-type chair 1 is stacked on the assembly-type chair 1, as shown in FIG. 13, the lower end surface 30b of the connecting beam portion 30 of the stacked assembly-type chair 1 is the lower assembly-type chair. 1 is engaged with the notch 24c of the armrest portion 24, the stability during stacking can be improved.

  Further, by grasping the openings 24a formed in the pair of leg portions 20, the assembly-type chair 1 can be transported and the assembly-type chairs 1 can be easily stacked.

  In the present embodiment, the regulating member 40 configured to bias the stopper pin 42 by the spring force of the coil spring 44 prevents the main body portion 10 including the seat portion 12 from coming off from the pair of leg portions 20 and 20. Although it was set as the structure, what kind of structure may be sufficient if it is the structure which prevents the main body part 10 including the seat part 12 from coming off from the pair of leg parts 20 and 20.

  In the present embodiment, the restriction member 40 is used to prevent the main body portion 10 including the seat portion 12 from being detached from the pair of leg portions 20, 20, but the restriction member 40 may be omitted.

  In the present embodiment, the stopper pin 42 is urged by the coil spring 44. However, the present invention is not limited to this. For example, the stopper pin 42 may be urged using another elastic member such as rubber or a leaf spring.

  In the present embodiment, the inclination angle θ of the pair of leg portions 20 and 20 is set to 7 °, but the present invention is not limited to this.

  In the present embodiment, the lower end surface 30b of the connecting beam portion 30 has a substantially arc shape in the cross section perpendicular to the longitudinal direction of the connecting beam portion 30, but the lower end surface 30b of the connecting beam portion 30 and the armrest portion 24 are used. The shape of the lower end surface 30b of the connecting beam portion 30 in the cross section perpendicular to the longitudinal direction of the connecting beam portion 30 may be any shape as long as the notch 24c formed on the upper end surface of the connecting beam portion 30 is engageable. .

  In the present embodiment, the main body 10 is configured to include the seat 12 and the backrest 14, but the backrest 14 may not be provided.

  This embodiment shows an example for carrying out the present invention. Therefore, the present invention is not limited to the configuration of the present embodiment.

1 Assembled chair (assembled chair)
10 Body 12 Seat (seat)
12a Recess (recess)
12b Upper surface 12c Lower surface 14 Backrest portion 20 A pair of legs (a pair of legs)
22 Grounding part (lower end)
24 armrest 24a opening 24b through hole 24c notch (notch)
24d Concave with bottom 26 Straight groove (groove)
26a upper surface 26b lower surface 30 connecting beam portion 30a both end surfaces 30b lower end surface 30c upper end surface 30d main surface 32 bottomed hole 34 bottomed hole 36 bottomed hole 38 through hole 38a large diameter hole 38b small diameter hole 40 regulating member (regulating member)
42 Stopper Pin 42a Pin Part 42b Shaft Part 42c Male Thread Part 44 Coil Spring (Elastic Member)
46 Handle 50 Bolt member 70 Dowel 80 Nut member VL Virtual straight line

Claims (4)

An assembly-type chair configured to be assembled,
A seat configured in a flat plate shape;
A pair of legs configured in a flat plate shape and configured to support the seat;
A connecting beam portion configured to connect the pair of leg portions below the seat portion;
A fastening member for fastening the pair of legs to the connecting beam;
With
Each of the pair of leg portions has a groove capable of engaging the seat portion,
The connecting beam portion is moved from the lower end portion, which is an end portion on the ground side, of the pair of leg portions toward the upper end portion of the pair of leg portions, which is an end portion on the opposite side to the lower end portion. An assembly-type chair configured to connect the pair of legs in such a manner that the distance between the legs gradually decreases. The assembly type chair according to claim 1, further comprising a regulating member that regulates movement of the seat portion in the extending direction of the groove. The seat has a recess at a position facing the connecting beam,
The restricting member includes a pin member installed in the connection beam portion so as to be able to project and retract, and an elastic member configured to bias the pin member so as to maintain a state in which the pin member protrudes from the connection beam portion. A member, and
The assembly-type chair according to claim 2, wherein the seat member is restricted from moving in the extending direction of the groove by the pin member being engaged with the recess. A concave notch is formed at the upper end of the pair of legs,
The assembly type chair according to any one of claims 1 to 3, wherein the connecting beam portion is configured such that a surface opposite to a surface facing the seat portion has a shape corresponding to the notch. .

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