JP2017148260A - Coupling device of folding chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coupling device of folding chairs capable of easily and quickly coupling chairs and having a simple configuration in the coupling device for laterally coupling the folding chairs.SOLUTION: A fitting box 5 is fixed to a seat part 3 of the folding chair by insertion pieces 11 and screws. Substantially elliptical-cross-sectional through-holes 9 are provided in both side plates 6 of the fitting box 5, and a coupling pipe 32 is inserted in the through-holes. A pair of couplers 20 include leg insertion grooves 22 formed on both sides of locking parts 21, and engagement pieces 29 are provided at edges of the leg insertion grooves. The legs 1 of the folding chair are inserted in the leg insertion grooves of the couplers, and the locking parts 21 are screwed shut, with the engagement pieces geared with each other, to fix the couplers to the legs.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a connecting device for a folding chair that can connect a plurality of folding chairs in a lateral direction.

  In recent years, a large number of folding chairs collected by leasing and rental have been used at various event venues, etc. In consideration of ease of deployment and ease of storage, a plurality of folding chairs such as three legs and four legs are used. In many cases, connecting chairs that are connected in the horizontal direction are used. As a connecting device for such a folding chair, there is known a connecting device in which one connecting pipe extending in the lateral direction is provided on the back side of the seat of the folding chair and the chairs are connected by this connecting pipe ( For example, see Patent Document 1).

  In the folding chair described in Patent Document 1, a boss is protruded downward from the seat frame of the chair, a connecting pipe is passed between the bosses, a bolt is inserted from the lower surface of the connecting pipe, and the boss is passed through the boss. Since the bolt is screwed onto the connecting pipe with the bolt tip hooked on the seat frame, a boss is welded to the sheet frame, or the tip is hooked on the inner surface of the seat frame with the bolt tip invisible. It has to be complicated, the configuration is complicated, and the installation work is troublesome. In addition, since the entire connecting pipe is exposed on the back of the seat, when the chair is folded, the connecting pipe appears on the outer surface, and when multiple folding chairs are stacked, other chairs are damaged or folded. When the chair is placed on the floor, the floor may be damaged. There is also a known configuration in which a boss is not provided on the seat frame, but two mounting members (saddle bands) of approximately Ω shape are screwed to the seat with a space between them, and the connecting pipes are attached in series. Since both ends of the member are screwed at two locations, the number of screwing locations is increased, making the installation work cumbersome and exposing the connecting pipe and mounting bracket. There is a risk of giving, and it is not satisfactory. Moreover, since the cross-sectional shape of the connecting pipe is circular, when the chair is expanded or folded, the attachment member and the connecting pipe rotate relatively, and the adjacent chair may slide or rotate. Workability is not good. When the cross-sectional shape of the connecting pipe is a circular cross-section, the amount of protrusion that protrudes outward from the back surface of the seat portion increases, and from this point, damage is more likely to occur.

  In the folding chair described in Patent Document 1, the front pipes of adjacent chairs are connected by a bolt via a collar while being connected by the connection pipe. Installation work is troublesome because it must be stopped. For this reason, there is also known a connecting tool in which a pair of members formed in parallel with semi-cylindrical parts are provided on both sides of the flat part, and the members are respectively fitted to the legs of adjacent chairs and connected by the flat part. (See, for example, Patent Document 2). However, since the connection tool described in Patent Document 2 is only attached to the end edge of the semi-cylindrical portion in a state of being attached to the chair, a force that twists the connection tool by shaking the chair acts. Then, there is a possibility that the end edges easily open, and fingers or clothes may be pinched, or the legs may come off from the semi-cylindrical part and the chair may be separated.

Japanese Utility Model Publication No. 42-19379 (claims of utility model claims, drawings) Japanese Utility Model Publication No. 56-23532 (utility model claims, drawings)

  The problem to be solved by the present invention is to provide a connecting device for a folding chair that can easily connect the folding chair, is less likely to damage other parts, and is hard to break.

  According to the present invention, there is provided a box-shaped mounting box having both side plates and an outer surface plate that covers between both side plates, and a pair of couplers having leg insertion grooves formed on both sides of the fastening portion. Both side plates are formed with through-holes through which the connecting pipes are inserted. Engagement pieces are formed at the edges of the leg insertion grooves of the connector, and the mounting box is attached to the back surface of the seat of the folding chair. Folding chair characterized by attaching and connecting the connecting pipe through the through hole, inserting the leg of the adjacent chair into the leg insertion groove of the connecting tool, engaging the engaging piece, and fastening the fastening portion The above-mentioned subject is solved.

  Further, according to the present invention, an insertion piece is formed on one end side of the mounting box, and a screw insertion hole is formed on the other end side, and the insertion piece is inserted into a slit provided in the seat portion and the screw insertion hole There is provided a connecting apparatus for a folding chair, wherein the connecting pipe and the mounting box are formed in a substantially elliptical cross section by screwing the screw through the seat. Further, the engaging piece of the connecting tool protrudes from the step formed on the edge of the leg insertion groove with an insertion interval, and the connecting tool is the connecting tool facing the engaging piece in a state where the step is in contact. There is provided a connecting device for a folding chair that fits in the insertion gap.

  The present invention is configured as described above, and a box-shaped mounting box having both side plates and an outer surface plate covering between both side plates is provided on the back surface of the seat portion of the folding chair, and through holes are formed in both side plates of the mounting box. Since the connecting pipe is inserted and formed, the mounting mechanism of the connecting pipe is simplified, the connecting pipe is almost hidden by the mounting box, and the portion exposed to the outside can be reduced compared to the conventional mounting bracket, There is little risk of damaging other chairs or damaging the floor as before. In addition, since a pair of connecting tools in which leg insertion grooves are formed on both sides of the fastening portion and an engagement piece is formed on the edge of the leg insertion groove of this connecting tool, the legs of the adjacent chairs are connected to the connecting tools. The coupling tool can be firmly joined by fastening the fastening portion in a state where the engaging piece is engaged with the leg insertion groove. Therefore, even if an excessive force acting on the chair to separate the connecting tools acts on the chair, the engagement piece is engaged, so there is no risk that the edge will open easily, avoiding finger pinching and chair separation. Can do.

  In addition, if the insertion piece and the screw insertion hole are provided on both ends of the mounting box, respectively, and the insertion piece is inserted into the slit provided in the seat portion and the screw is inserted into the screw insertion hole, it is attached to the seat portion. The number of screwing points is reduced, and the installation work is simplified. When the mounting hole of the connection pipe and the mounting box is formed in a substantially elliptical cross section, the connection pipe and the mounting box can be prevented from rotating relatively in the inserted state, and the folding chair connected in the lateral direction can be expanded, The chair can be prevented from slipping when folded, making it easy to work. In addition, the protruding amount of the connecting pipe protruding from the seat portion to the back surface side is smaller than that of a pipe having a circular cross section, and the possibility of damage is reduced.

  Further, since the engagement piece is provided on the end edge of the connection tool so as to be engaged with each other, even if an unreasonable force that separates the connection tools acts on the chair, the connection tool is engaged by the engagement of the engagement piece. It can be prevented from being easily separated, and a gap is not easily generated between the connecting tools, so that fingers, clothes, and the like can be prevented from being pinched.

The front view of the folding chair which connected one leg and showed one Example of this invention. The front view of the one part of the folding state which abbreviate | omitted one part. The mounting box is shown, (A) is a perspective view, (B) is a plan view, and (C) is a side view. The disassembled perspective view which shows a coupling tool. Explanatory drawing of the coupling tool of the isolate | separated state.

  The present invention can be applied to various folding chairs. However, in the drawing showing an embodiment, the front leg 1, the rear leg 2 and the seat 3 that are foldably connected to the front leg 1, and the front leg If the back part 4 provided above is provided and the front part of the seat part 3 is held and pivoted upward as is well known, the front leg 1 and the rear leg 2 can be folded. Is rotated downward, the front leg 1 and the rear leg 2 are opened, and the seat portion 3 is developed in a substantially horizontal state and can be seated.

  A substantially box-like mounting box 5 is attached to the back surface of the seat portion 3 of the folding chair. The mounting box 5 is preferably formed of a plastic material and is formed in a substantially rectangular shape as shown in FIG. 3, and the side plates 6 stand up on both sides. The side plate 6 is formed in a shape in which the inner side 7 on the back surface side of the seat portion 3 is linear so as to follow the seat portion and the center portion is curved outward, and the outer side 8 on the side away from the seat portion is The side plate is formed in an arc shape swelled in a direction away from the back surface of the seat portion so as to form a space between the seat portion and the outer side 8 is located inward from the inner side 7 on the back side. The whole is inclined. The side plate 6 has a long hole formed long in the direction along the back surface of the seat, and in the embodiment shown in the figure, a through hole having a substantially elliptical cross section having straight portions along the inner side and the outer side. Is formed. Due to the shape described above, the mounting box is formed thin as a whole, has strength, and can be hardly broken even when folding chairs are stacked.

  An outer surface plate 10 is formed on the mounting box 5 so as to cover both side plates 6. A rectangular insertion piece 11 protrudes from both ends on one end side of the outer surface plate 10, and screw insertion holes 12 are provided on both ends on the other end side. Corresponding to the insertion piece 11 and the screw insertion hole 12, two slits 13 into which the insertion piece 11 is inserted are opened on the back surface of the seat portion 3 as shown in FIG. An embedded nut 15 for screwing is embedded. In addition, a fixing hole 16 with an opening edge covered is provided at the substantially central portion of the outer plate 10. The inner surface of the outer surface plate 10 is provided with a horizontal rib 17 connecting both end sides of the through-hole 9 and a vertical rib 18 extending between the horizontal rib 17 and the edge of the outer surface plate. A raised portion 19 is formed in the upper portion.

  The front legs 1 of adjacent folding chairs are connected by a pair of connecting tools 20. The connector 20 is preferably formed of a plastic material, and leg insertion grooves 22 are formed on both sides of a substantially flat fastening portion 21. A fastening hole 23 is formed at the center of the fastening part 21, two bosses 24 are formed at the corners of the inner surface, and a boss hole 25 that can be fitted to the bosses of the opposing connector is provided, and Ribs 26 are provided. The leg insertion groove 22 can be formed in a semi-circular shape or the like corresponding to the cross-sectional shape of the leg. However, in the embodiment shown in the figure, the cross-sectional shape of the front leg 1 of the folding chair is flat and substantially elliptical. Since it is formed in a shape, it is formed in a substantially semi-elliptical cross section correspondingly. On the edge of the wall 27 that forms the leg insertion groove 22, a step 28 is formed extending outward at a thickness half the thickness of the edge, and is engaged with the outside of the step 28. A piece 29 is projected. The engagement piece 29 is formed in an arc shape with a tip portion protruding outward from the stepped portion, and is provided with a plurality of insertion gaps 30. The insertion gap 30 is formed on the outside of the wall portion and has an arcuate bottom portion. It is a receiving groove. The tip of the engagement piece 29 is slightly inclined to the stepped portion side, and when the pair of couplers are joined together by this inclination, the engagement piece fits into the insertion gap 30 and the wall 27 By engaging the outer surface and fitting the boss 24 into the boss hole 25, the coupling tool can be firmly coupled. Ribs 31 surrounding both sides of the fastening hole 23 are also provided on the outer surface of the connector 20.

  The connecting pipe 32 inserted through the mounting box is formed in a shape corresponding to the cross-sectional shape of the through hole 9 provided in the mounting box, and in the embodiment shown in the figure, the straight portion corresponds to the long hole-shaped through hole. The cross section is formed in a substantially oval shape. The through-hole 9 and the connecting pipe 32 can be formed in a circular cross section, a rectangular cross section, or any other appropriate shape as desired. As in the embodiment, when the pipe having a substantially elliptical cross section is used and the shorter one is in the folding direction of the seat, the thickness of the mounting box 5 can be made thinner than that of the round pipe, and the mounting box 5 Therefore, the unfolding and folding operations of the folding chair are stabilized and the operability is increased. The connecting pipe 32 is provided with a screw hole 33 at a position corresponding to the fixing hole 16 provided in the mounting box 5.

  With the above configuration, in order to connect the folding chair, the insertion piece 11 of the mounting box 5 is inserted into the slit 13 provided on the back surface of the seat portion 3, and the screw 14 is inserted into the screw insertion hole 12 so as to be embedded in the seat portion. The mounting box 5 is fixed to the seat 3 by screwing onto the nut 15. Then, the connecting pipe 12 is communicated with the through hole 9 of the mounting box 5 of the adjacent chair, and the fixing hole 16 is screwed with a screw 34. On the other hand, two connecting tools 20 are applied from the front and rear of the front leg 1 of the adjacent chair, the legs 1 are fitted into the leg insertion grooves 22, and the engaging pieces 29 of the connecting tools 20 are engaged with the mating connecting tools. If the fastening part 21 is screwed with the screw 35 and the nut 36, the folding chair is securely connected in the lateral direction by the connecting pipe 32 and the connecting tool 20.

  Since the present invention is configured as described above, the left and right folding chairs can be reliably connected so as not to be shaken, and the deployment and storage operations are simple. In addition, since it can be easily assembled with a mounting box and a pair of connecting devices, the operation is easy and quick, and the number of parts is small, which is economical.

DESCRIPTION OF SYMBOLS 1 Front leg 2 Rear leg 3 Seat part 5 Mounting box 9 Through-hole 11 Insertion piece 12 Screw insertion hole 13 Slit 15 Embedded nut 20 Connecting tool 21 Fastening part 22 Leg insertion groove 24 Boss 25 Boss hole 29 Engagement piece 32 Connection pipe

According to the present invention, there is provided a box-shaped mounting box having both side plates and an outer surface plate that covers between both side plates, and a pair of couplers having leg insertion grooves formed on both sides of the fastening portion. Both side plates are formed with through-holes through which the connecting pipes are inserted. Engagement pieces are formed at the edges of the leg insertion grooves of the connector, and the mounting box is attached to the back surface of the seat of the folding chair. mounting, the legs of the chair adjacent together when passing the connecting pipe into the through hole is inserted into the leg insertion groove of the connector folding, characterized in that fastened the fastening portion engaged with the engaging piece A connecting device for a chair is provided to solve the above problem.

An outer surface plate 10 is formed on the mounting box 5 so as to cover both side plates 6. At both ends of the one end side of the outer surface plate 10 has a rectangular insertion piece 11 is projected, the screw insertion holes 12 are found provided at both ends of the other end. Corresponding to the insertion piece 11 and the screw insertion hole 12, two slits 13 into which the insertion piece 11 is inserted are opened on the back surface of the seat portion 3 as shown in FIG. An embedded nut 15 for screwing is embedded. Further, in the substantially central portion of the outer surface plate 10 fixing hole 16 that Saramomi opening edge is al provided. The inner surface of the outer surface plate 10 is provided with a horizontal rib 17 connecting both end sides of the through-hole 9 and a vertical rib 18 extending between the horizontal rib 17 and the edge of the outer surface plate. A raised portion 19 is formed in the upper portion.

Claims (7)

  A box-like mounting box having a side plate and an outer plate covering between the both side plates, and a pair of connecting members having leg insertion grooves formed on both sides of the fastening portion; A through hole is formed, and an engagement piece is formed at the edge of the leg insertion groove of the connector, and the attachment box is attached to the back surface of the seat portion of the folding chair and the connection pipe is inserted into the through hole. A connecting device for a folding chair, wherein the leg of the adjacent chair is inserted into the leg insertion groove of the connector and the engaging piece is engaged to fasten the fastening portion.   The seat of the folding chair is provided with a slit and an embedded nut, an insertion piece is formed on one end of the mounting box, a screw insertion hole is formed on the other end, and the insertion piece is provided on the seat. 2. The connecting device for a folding chair according to claim 1, wherein the connecting device is inserted into the slit and screwed into the seat through a screw insertion hole.   The connecting device for a folding chair according to claim 1 or 2, wherein the cross-sectional shape of the connecting pipe and the cross-sectional shape of the through hole of the mounting box are formed into a substantially elliptical cross-section.   The apparatus for connecting a folding chair according to claim 3, wherein the substantially oval cross section is formed long in a direction along the back surface of the seat.   The engaging piece of the connector protrudes from the step formed on the edge of the leg insertion groove with an insertion interval, and the connecting tool is inserted into the connector facing the engaging piece while the step is in contact. The connecting device for a folding chair according to claim 1, which fits into the gap.   The folding chair connecting device according to claim 5, wherein a tip end of the engagement piece is inclined toward the stepped portion.   The connecting device for a folding chair according to claim 5 or 6, wherein a boss and a boss hole are formed in the fastening portion of the connector.

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