JPH0312288Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention is a method for extending the seats in a theater or gymnasium, etc., when it is desired to temporarily construct the seats, configuring the seats in a stair-like shape, and contracting the seats when not in use. The present invention relates to a handrail device for an extendable and retractable bleacher seat that can be stored in a corner of a room.

Conventional technology and problems Conventionally, in theaters, gymnasiums, etc., when it is desired to temporarily install bleachers, the bleachers are extended to form a staircase-like structure, and when not in use, the bleachers are retracted and stored in a corner of the room. A handrail device for an extendable and retractable bleacher seat is known, for example, from Japanese Utility Model Application Publication No. 166745/1983.

However, according to the conventional structure, between the upper ends of the front and rear columns, which are erected at the front and rear end positions of the movable platform of each stage, respectively, in a forward tilted state and with the rear part deviated outward,
Since the front part is equipped with a handrail that is bent in an L-shape or a handrail that extends in a straight line, in the former case, there is not only a risk that objects may be caught while driving due to the presence of the L-shaped bent part. If the height of the handrail, which is set according to the average height of an adult, corresponds to the height of a child, there is a risk that the child's face or neck may get caught in the L-shaped bend. Although this does not pose the above-mentioned dangers, when the bleachers are retracted, the rear column is largely deviated outward from the front column so that the handrail at the front position does not come into contact with the front column at the rear position, or The handrail position of the front stage must be shifted outward in sequence from that of the rear stage, and as a result, the rear column may be far away from the front surface of the movable platform, or the handrail position of the front stage position and the last stage position may be different. Not only do the handrails differ greatly outwardly and the distance between the handrails becomes uneven, which seriously spoils the appearance, but also the structure of arranging the crosspieces so as to close the front and rear supports is troublesome for safety reasons.

Purpose and Examples of the Invention Therefore, the present invention is an improvement on the above-mentioned defects of the conventional device, and its features include a column that slopes diagonally forward and a handrail that extends horizontally forward from the upper end of the column. , the lower ends of the handrail frames in which a plurality of horizontal bars extending horizontally rearward are arranged in parallel on the pillars are attached to the rear end positions of each movable platform that constitutes the telescopic movable bleachers, and the handrails at the front stage are attached to the pillars. The horizontal beams arranged in parallel with the frame support are slidably supported by the handrail frame support located at the rear stage.

That is, in the figure, 1 is a column 2 that is inclined diagonally forward.
and a handrail portion 3 formed in an almost square shape extending horizontally forward from the upper end of this support 2, and a handrail in which a plurality of horizontal bars 4 extending horizontally backward are arranged in parallel on the support 2. The lower ends of the columns 2 of this handrail frame 1 are each movable platform 11 that constitutes a telescopic movable spectator seat 10.
The horizontal beams 4 of each handrail frame 1, which are attached to the side surfaces of the rear end portions via attachments 9, and thus attached to each movable platform 11, are slidable relative to the columns 2 at the rear position. Supported.

As a support means for slidably supporting the horizontal bar 4, a horizontal hole into which the horizontal bar 4 is inserted may be directly provided in the column 2, but as shown in FIG. , a case is shown in which a support piece 6 made of, for example, synthetic resin and having a support hole 5 is provided in a protruding manner. Reference numeral 7 denotes a connecting portion that slidably connects the handrail portions 3 that are adjacent to each other in the front and rear. Lower piece 3b
The front part of the sliding groove 7b is formed narrowly to prevent play between the sliding groove 7b and the engaging shaft 7a. has been done.

In the above, the interval between the horizontal bars 4 is the same as that of each movable platform 11 when the telescopic movable bleachers 10 are in the contracted state.
The horizontal bars 4 of the handrail frame 1 attached to the handrail frame 1 are set at different height positions.

The movable floor platform 11 has a floor platform 1 that extends forward between the upper parts of leg supports 14 respectively erected at the rear ends of left and right horizontal legs 13 having rolling wheels 12 on the lower surface.
5 are hung horizontally, and a chair 16 that can be folded and raised is arranged on the floor board 15.

In the extended state of the telescopic movable bleachers, as shown in FIG. Horizontal beam 4 installed on handrail frame 1
However, in the contracted state, as shown in FIG. The horizontal crosspiece 4 projects rearward from the movable platform 11 at the rearmost position.

In this embodiment, the support column 2 at the last position is formed vertically, and only the handrail frame 1 at the front position has an L-shaped auxiliary frame 8 between the lower front end of the handrail part 3 and the lower end of the support column 2. A case is shown in which a horizontal beam 4 is attached between the support column 2 and the auxiliary frame 8 with both ends fixed.

Effects of the invention Since the present invention is constructed as described above, it is possible to provide a safe handrail device without any angular parts unlike the conventional one, and when the telescopic movable bleachers are in the extended state, Since each handrail frame is connected to each other by horizontal bars to form almost a single vertical plane, it has advantages such as increased mechanical strength and extremely good appearance.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a plan view of the handrail frame, FIG. 2 is a top view of the same, and FIG. 3 is a top view of the handrail frame.
A sectional view taken along the line A-A in the figure, Figure 4 is a side view of the telescopic movable bleachers equipped with a handrail frame in the extended state, Figure 5 is a side view of the retracted state, and Figure 6 is a part showing the connecting part. FIG. 7 is an enlarged plan view of a cut portion and an enlarged sectional view showing a support portion of the horizontal beam. In the figure, 1 is the handrail frame, 2 is the support, 3 is the handrail part, 4 is the horizontal beam, 5 is the horizontal hole, 6 is the support piece, 7 is the connecting part, 7a
1 is an engagement shaft, 7b is a sliding groove, 10 is a telescopic movable spectator seat, and 11 is a movable floor stand.

Claims (1)

[Claims for Utility Model Registration] (1) Consisting of a column that slopes diagonally forward and a handrail that extends horizontally forward from the upper end of the column, and the column is provided with a plurality of horizontal bars that extend horizontally rearward. Attach the lower ends of the handrail frames to the rear end positions of each of the movable platforms that make up the telescoping movable bleachers, and attach horizontal bars parallel to the handrail frame supports located in the front stage to each of the handrail frame supports. A handrail device for a telescopic movable bleacher seat, which is provided with support means for movably supporting the seat. (2) A handrail device for an extendable and retractable bleacher seat as set forth in claim 1 of the utility model registration claim, in which the support and handrail portion are integrally provided by bending and molding a single metal pipe. (3) A handrail device for a telescopic movable spectator seat as set forth in claim 1 or 2 of the utility model registration claim, in which the handrail portion is bent and molded into a square shape. (4) Utility model registration claims 1, 2, or 3 in which the support means is a support piece that protrudes from the outer surface of the support and has a horizontal hole through which the horizontal crosspiece is slidably inserted. A handrail device in the telescoping movable bleachers according to item 3.