JPH0446600Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a connector used to connect a plurality of single-seater chairs side by side.

Prior Art As a means for connecting single-seater chairs used in gathering halls, halls, etc. side by side, a male member provided on one side of adjacent chairs and a female member provided on the other side are mutually connected. Structure that fits (Utility Model Application No. 52-102410, same)
No. 53-23406, No. 57-107446, etc.), 1 with L-shaped engaging claws provided oppositely at the front and back of one side of the chair.
A structure in which a pair of connecting members and a similar pair of connecting members provided on the front and back of the other side are engaged with each other (Utility Model Application No. 121804/1983), a rivet provided on one side of the chair. A structure in which the head of a connecting fitting engages with an inverted U-shaped notch on the other side (Utility Model Application No. 55-48863), an L-shaped connecting pin with a hook at the tip is attached to one side of the chair. A structure is known in which the connecting pin is always biased in the retracting direction by a coil spring, and the hook portion of the connecting pin is inserted into a locking hole on the other side of the chair (Utility Model Application No. 57-107445). ing.

Problems to be Solved by the Invention However, the above conventional structure using two types of connecting members, male and female, has the disadvantage of increasing the cost of the members, and the above-mentioned rivet-shaped connecting fittings and L-shaped connecting members are disadvantageous. In a structure using a connecting pin, the connecting portion is likely to wobble, resulting in poor stability. Furthermore, in the above-mentioned structure in which a pair of front and back facing connecting members and a backside connecting member are engaged, it is necessary to reduce the front-to-back distance between one pair when engaging and disengaging, so for example, folding This method cannot be applied to chairs other than those in which the front and rear leg frames can be opened and closed, such as a type pipe chair, and there is a problem in that the connecting portion easily comes off.

In view of the above-mentioned circumstances, this invention allows chairs, etc. to be easily connected by mutual engagement of a single member, has excellent connection strength and stability, and has a good external appearance of the connection part. Another object of the present invention is to provide a connector that is not limited by the type of chair or the like to which it is applied.

Means for Solving the Problems In order to achieve the above object, the connector for a chair, etc. according to this invention has a substantially short cylindrical body integrated with a mounting screw shaft coaxially protruding from its rear end. The front part of the main body has a step that divides the front surface into approximately two high and low semicircular parts, and a locking protrusion protruding in the radial direction is provided at the center of the front side of the boundary surface of this step. At the same time, a locking groove is formed that opens at the rear side of the boundary surface and recesses in a radial direction opposite to that of the locking protrusion, and the locking protrusion has a semicircular portion with a high front surface. The locking groove is flush with the main body and has a height that does not protrude outward from the circumferential surface of the main body, while the locking groove has a shape and size that allows the locking protrusion of another connector having the same configuration to be inserted into the locking groove. This configuration employs the following configuration.

Function: To connect the connector, screw the mounting screw shaft into a screw hole provided in the frame of the chair, etc., or insert the mounting screw shaft into the mounting hole of the frame and tighten the nut from the opposite side. This allows the device to be attached to the frame with only the main body exposed.

Therefore, if a connecting tool is installed on one side of a chair, etc. with the locking protrusion facing upward, and the same connecting tool is installed on the other side with the locking protrusion facing downward, the adjacent chair Both connectors can be engaged with each other with each locking protrusion inserted into the locking groove of the other. By this engagement, the adjacent chairs etc. are connected so as to be immovable in both the separation direction and the front-rear direction, and the bodies of the two engaged connectors have a cylindrical appearance at the connected portion. In addition, the connection can be easily released by lifting the side of the connector with the locking protrusion facing downward, but it cannot be released by any other operation, so there is no risk that the connection will come off inadvertently during use. do not have.

Note that by setting the dimensions so that the locking protrusion of the connector and the locking groove closely engage with each other, it is possible to prevent rattling in the connector.

The locking protrusion can be configured in various shapes such as a tongue shape or a semicircular plate shape, and the shape of the locking groove may be set according to this shape. Note that the locking groove can be configured either in the form of a slit penetrating the circumferential surface of the main body or in the form of a bottomed groove that does not reach the circumferential surface.

Embodiments Hereinafter, this invention will be specifically explained based on illustrated embodiments.

1 to 3 show a first embodiment, in which a connector A has a mounting screw shaft 2 attached to the rear end of a substantially short cylindrical body 1 made of a hard synthetic resin molding.
It is integrated so that it protrudes rearward along a coaxial line. The screw shaft 2 is integrated into the main body 1 by inserting the head 2a of a countersunk screw into a mold when the main body 1 is molded.

The above main body 1 has a semicircular portion 1 with a high front surface at the front.
A and a lower semicircular portion 1b have a step 3 approximately bisected into two, and a tongue-shaped locking protrusion 4 protrudes in the radial direction at the center of the front side of the boundary surface 3a of the step. In addition, a locking groove 5 is provided which opens at the center of the rear side of the boundary surface 3a. The locking protrusion 4 is set so that its front surface is flush with the higher semicircular portion 1a, and
The tip has a length that is slightly lower than the circumferential side surface 1c of the main body 1, and has a width such that a step 3 remains on both sides of the base. The locking groove 5 has a width slightly wider than that of the locking protrusion 4, is recessed in the radial direction opposite to the locking protrusion 4, and has a slit shape that penetrates through the circumferential surface of the main body 1. , and the distance between the front and rear walls is set to be slightly larger than the thickness of the locking protrusion 4.
Note that the boundary surface 3a of the step 3 is a higher semicircular portion 1a.
is in a plane parallel to the axis slightly eccentric so that it is slightly narrower than the lower semicircular portion 1b.

4 to 8 show examples in which the above-mentioned connecting tool A is applied to connecting chairs 6.

As shown in FIG. 4, the chair 6 includes a main body shell 7 made of a hard synthetic resin molded material that constitutes a seat portion 6a and a backrest portion 6b, a pair of left and right front leg frames 8, 8, and a pair of left and right rear legs. frame 9,
It consists of 9. The front leg frame 8 is divided into two stages, each having a leg part 8a, a horizontal part 8b along the side of the seat part 6a, and a raised part 8c along the lower part of the back of the backrest part 6b, as shown in FIG. It has a bent shape, and is screwed to the main body shell 7 at the bent part from the leg part 8a to the horizontal part 8b, and the main body shell 7 is attached between the outer rear leg frame 9 at the raised part 8c. It is configured to be screwed together at two places, upper and lower, with the ear piece 7a in between.

However, in this case, as shown in FIGS. 5 and 6, the coupling tool A is used to screw the mounting ear piece 7a of the main body shell 7, and the mounting screw shaft 2 of the coupling tool A is attached to the rear. Leg frame 9 and mounting ear piece 7a
The members 7 to 9 are assembled on the backrest portion 6b side by inserting them into the screw insertion holes 10a and 10b and tightening them with nuts 11 fitted into the through holes 10c of the front leg frame 8. Thus, each attached connector A has a shape in which only the main body 1 is exposed.

Here, the mounting posture of the pair of upper and lower connectors A on both the left and right sides of the chair 6 is, for example, such that the locking protrusion 4 faces upward on the right side, and the locking protrusion 4 faces downward on the left side.
Set it so that both sides are in the opposite direction. As a result, as shown in FIG. 7, the orientation of the locking protrusions 4 of the opposing connectors A, A of the adjacent chairs 6, 6 is reversed, so that the locking protrusions 4 face downward. Lift up the chair 6 on the other side (the right side in the figure) and fit its connector A into the corresponding connector A of the other chair 6 from above, as shown by the dashed line in the figure, to prevent the other connector A from engaging. The locking protrusions 4 are both fitted into the locking grooves 5 of the other side, and both the chairs 6,6 are connected in such a manner that the bodies 1,1 of the fitted connectors A,A have an integral cylindrical appearance as shown in FIG. can be connected side by side. Of course, it is also possible to connect three or more legs side by side in the same way. Moreover, in order to release the above-mentioned connected state, it is sufficient to lift the side of the connector A where the locking protrusion 4 is facing downward.

9 to 11 show a second embodiment of the connector B.
In this connector B, the locking protrusion 4 has a semicircular plate shape, and the front surface is flush with the higher semicircular part 1a, and the tip is set to a length that does not reach the circumferential side surface 1c of the main body 1. Correspondingly, the locking groove 5 is configured as a semicircular bottomed groove with an arcuate bottom surface.
The other parts have the same construction as the parts indicated by the same reference numerals of the connector A of the first embodiment, and can be used in the same manner as the connector A of the first embodiment.

In the application examples shown in FIGS. 4 to 8, the coupling tool is used to screw the backrest of the chair to the front and rear leg frames, but the coupling tool may be attached separately from the screw fixing section. Furthermore, the mounting position and the number of connectors can be changed as appropriate. Furthermore, this connector can of course be applied to other types of chairs such as folding chairs, and can also be used to connect various furniture and fittings, including tables, desks, partition fittings such as screens, etc. It is.

Effects of the invention The connector of this invention is a single member with no difference in structure like male and female types, but it can be installed in such a way that the locking protrusion is oriented upside down relative to an adjacent chair, etc. By positioning the chairs, etc., it is possible to easily connect the chairs by engaging them with each other, and since it is a single member, the manufacturing cost is low. In addition, it has excellent engagement force and can realize a strong and stable connection state, and the connection part is exposed as a solid cylindrical shape, giving it a good external appearance. Since it is integrated into the main body, it has the advantage of being very easy to install.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a connector according to the first embodiment of this invention, Fig. 2 is a partially cutaway front view of the same as above, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Fig. 4. Figure 5 is an exploded perspective view of the attachment part of the above connector, Figure 6 is a vertical sectional view of the attachment part, and Figure 7 is the state of the chair before connection. FIG. 8 is a front view of the main parts in the connected state, FIG. 9 is a perspective view of the connector of the second embodiment,
FIG. 10 is a partially cutaway front view of the same as above, and FIG. 11 is a sectional view taken along the line - in FIG. 10. A, B... Connector, 1... Main body, 1a, 1b...
...Semicircular part, 1c... Circumferential side, 2... Screw shaft for mounting, 3... Step, 3a... Boundary surface, 4... Locking protrusion, 5... Locking groove, 6... Chair.

Claims (1)

[Scope of utility model registration request] A substantially short cylindrical main body is integrated with a mounting screw shaft coaxially protruding from the rear end, and the front part of the main body has a step that divides the front surface into approximately two high and low semicircular parts, A locking protrusion that protrudes in the radial direction is provided at the center of the front side of the boundary surface of this step, and opens at the rear side of the boundary surface and extends in the radial direction opposite to the locking protrusion. A recessed locking groove is formed, and the front surface of the locking protrusion is flush with the higher semicircular portion, and the tip is set at a height that does not protrude outward from the peripheral side of the main body. A connector for a chair or the like, wherein the groove has a shape and size that allows the above-mentioned locking protrusion of another connector of the same configuration to be inserted thereinto.