JPH0536957Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a door having a pantograph expansion/contraction mechanism that can be used for gates, fences, partitions, etc.

Prior Art This type of telescoping door has a plurality of diagonal members tilted at equal angles in opposite directions and arranged in a pantograph shape, and a pin is supported by spacer bushes at the intersections of the front and rear diagonal members. This reduces rattling at the pin joints of such telescoping doors.
As a means of opening and closing the door body smoothly, a structure is proposed in which a collar is formed at the part of the standoff bushing where it abuts against the diagonal frame member, and the two are brought into wide contact (for example,
(No. 168698, No. 61-108498, and No. 62-94295), the ends of the hollow rotating shafts are caulked to the diagonal members, and the inner and outer rotating shafts fixed to the front and rear diagonal members are fitted. structure (for example, Special Publication No. 57-43715 and Jikkosho
57-14310) etc. are known.

Problems to be solved by the invention The conventional pin connection structure in which a flanged bush is interposed between the diagonal members does not connect the diagonal members and the bushes in an integral manner. Even if the flange of the bushing is brought into contact with the bushing, it is not possible to sufficiently control the swinging of the diagonal member in the longitudinal direction.

In addition, the pivot connection structure in which the inner and outer rotating shafts fixed to the diagonal frame members are fitted together is extremely sturdy, with both rotating shafts making wide contact in the longitudinal direction.
The work of integrating the diagonal frame members and the rotation shaft was complicated.

Measures to Solve the Problems In view of the above circumstances, the inventors of the present invention have conducted extensive studies, and as a result, they have developed a system in which a plurality of diagonal members are tilted at equal angles in opposite directions and arranged in a pantograph shape, and In an extendable door in which the intersecting positions of the front and rear diagonal members are pivotally connected by pin shafts with spacer bushes interposed therebetween, the spacer bushes are arranged in pairs and communicate with the pin holes outwardly in the front and rear direction of each spacer bush. A cylindrical protrusion having a hollow portion is integrally formed, and the cylindrical protrusion is fitted into the shaft hole of the diagonal frame member with the ends of the protrusion protruding from the front and rear outer surfaces of the diagonal frame member, and the separation bush The desired purpose is achieved by integrally forming a locking edge in the same direction as the cylindrical projection on the side of the diagonal member and engaging the side of the diagonal member.

In addition, in carrying out the present invention, a blind bushing is fitted to the tip end of the cylindrical projection, and a locking edge protruding front and rear inward from the side of the blind bushing is engaged with a side surface of the diagonal frame member. Both the locking edges of the blind button and the spacer button should be in contact.

Function According to this invention, the separating bushes between the diagonal members are fitted to the pin shaft from the center thereof to the front and rear of the diagonal members, and the locks formed on the sides of the separating bushes are fitted. Since the edge engages with the diagonal frame member and the diagonal frame member and the spacer bushing are integrated, there is no wobbling at the pin joint, and the door body can be opened and closed extremely smoothly.

Example The telescoping door shown in the drawing has a diagonal lattice shape in which the diagonal members 1, 1... are tilted at equal angles in opposite directions, and two diamond-shaped spaces above and below and one diamond-shaped space above and below are repeated in the left and right direction. , an inverted U-shaped vertically elongated member 2, 2... is arranged outside the center of the upper and lower diamond-shaped space,
The front and rear diagonal members 1, 1 and the intersections of the diagonal members 1, 1 and the longitudinal members 2, 2 are pivotally connected by pin shafts 3, 3, . . . .

Fig. 2 shows a pin connection structure provided at the intersection of diagonal members 1, 1 in the front and rear positions, in which a cylindrical protrusion 5 having a hollow part communicating with a pin hole outwardly in the front and rear direction is integrated. Separate bushes 4, 4 are formed in the same direction as the cylindrical protrusions, and locking edges 6, 6 are integrally formed on the sides of the bushes. The protrusion 5 is fitted into the shaft hole of the diagonal member 1 with its ends protruding from the front and rear outer surfaces of the diagonal member 1, and the locking edges 6, 6 of the spacer bushes 4, 4 are fitted into the shaft hole of the diagonal member 1. It is engaged with the side part of 1.

In the figure, 7 is a blind bushing fitted to the tip of the cylindrical projection 5, and locking edges 8, 8 are integrally formed on the sides of the bushing in front and inwardly. and the locking edges 8, 8 of the blind bushing 7 and the locking edges 6, 6 of the separating bush 4 are brought into contact with each other, and the setscrews 9, 9 are screwed into the ends of the pin shafts. This is what was done.

Figure 3 shows a joint structure in which the diagonal members 1, 1 are pivotally connected at their intersecting positions in the same manner as described above, and the pin shaft 3 is fixed to the longitudinal members 2, 2 with the pin shafts 3 protruding forward and backward. Projections are formed on the front and rear sides of the bush 7 and engaged with the longitudinal grooves of the longitudinal member 2, and the ends of the extended pin shafts 3 are screwed to the longitudinal member 2.

Figure 4 shows a structure in which diagonal members 1 and 1 are pivotally connected at their intersection points by pin shafts 3, and the pin shafts protrude forward and backward and are fitted into vertical members 2 and 2 so as to be able to slide up and down. It shows.

Incidentally, if the distance between the front and rear diagonal members becomes significantly large in implementing the present invention, an intermediate bush may be interposed between the spacing bushes 4, 4 as necessary.

Effects of the invention According to this invention, it is possible to assemble the pin joint very easily by inserting and fitting the spacer bush into the pin shaft and fitting the diagonal member and the spacer bush. By making wide contact and firmly connecting the diagonal frame member and the standoff bushing, it eliminates rattling at the pin joint, making the opening and closing operation of the door extremely smooth. It has great practical effects, such as enclosing the pin joint, increasing the mass of the pin joint, and enhancing the aesthetic appearance.

[Brief explanation of the drawing]

Figure 1 is a front view showing an example of the telescoping door of the present invention;
The figure is an enlarged cross-sectional view taken along the line A-A in Figure 1, Figure 3 is an enlarged cross-sectional view taken along the line B-B, Figure 4 is an enlarged cross-sectional view taken along the line C-C, and Figure 5 is an enlarged front view of the pin joint. In the figure, 1 is a diagonal member, 2 is a longitudinal member, 3 is a pin shaft, 4 is a separation bushing, 5 is a cylindrical projection, 6 is a locking edge, 7 is a blind bushing, and 8 is a locking edge. represent

Claims (1)

[Scope of utility model registration request] A telescoping door in which a plurality of diagonal members are arranged in a pantograph shape by tilting them at equal angles in opposite directions, and the intersections of the front and rear diagonal members are pivotally connected by pin shafts with spacer bushes interposed between them. The spacer bushes are arranged in a pair, and a cylindrical projection having a hollow portion communicating with the pin hole is integrally formed on the outer side of each spacer bush in the front-rear direction, and the cylindrical projection is connected to the shaft hole of the diagonal member. The ends of the protrusions are fitted so as to protrude from the front and rear outer surfaces of the diagonal member, and a locking edge is integrally formed on the side of the separation bushing in the same direction as the cylindrical protrusion. A retractable door characterized by being engaged with a part.