JPS5833994Y2 - Radial opening and closing device of the arm against the column - Google Patents

Description

[Detailed description of the invention] This invention is, but not limited to, a clothes drying rack that is pivoted around a vertically erected post so that it can be opened and closed radially. It relates to a radial opening/closing device for an arm relative to a support, such as a clothes drying arm that opens to hang drying items and closes parallel to the support when not in use.

The present applicant filed Utility Application No. 51-159283 (Utility Application No. 159283-
7n37) proposed a radial opening/closing device in which all of the arms are pivoted so as to be able to open and close radially around an actuating tube that is slidably fitted to a column, and the actuating tube is attached to the column. By pushing up, all the arms open at the same time, and conversely, by pulling down the raised operating cylinder, all the arms close at the same time, and although it has the advantage of opening and closing all the arms at the same time. On the other hand, there are problems in that a large amount of force is required to push up and pull down the actuating tube, and a stopper is also required in addition to the actuating tube, making the mechanism complicated.

Therefore, in the present invention, the required number of arms can be opened and closed one by one, and instead the mechanism is simple and the arm can be opened and closed without any force. Explain the idea.

Reference numeral 1 denotes a column, and the lower part thereof has an appropriate tripod-like or quadruped-like stand device, preferably an openable/closable stand device, so that it stands vertically.

The strut 1 has the same number of bearing pieces 3 (three in this case) as the arms, which protrude outward in the radial direction, at equal intervals in the circumferential direction around the position where the arm 2 is to be pivoted. The one-piece base is pivotally connected to the shaft 4 by the shaft 4, and normally hangs down from the bearing piece due to its own weight and is closed (solid line in Figure 1).

Therefore, in order to open the arms 2, from the hanging state, each arm is raised outward and upward at a required angle (approximately 90 degrees in the case of a clothesline arm) as shown by the arrow in FIG.

From around the support column 1, when the arm 2 is pulled up at a required angle and opened as described above, the proximal upper surface 2a of the arm 2 is received, and the arm is prevented from returning to the closed state and opened. A stopper 5 for maintaining this state is provided to protrude radially outward.

The bearing piece 3 is provided with a long hole 6 that allows the shaft 4 to be moved in a direction away from the support.

The positional relationship between the stopper 5 and the elongated hole 6 is such that when the shaft 4 is positioned at the end (inner end) 6a of the elongated hole 6 that is closer to the support and the arm is pulled up to open the closed arm, the arm will open halfway. The lower surface of the proximal end of the arm contacts the stopper 5, and when the shaft 4 is pulled up from the end (outer end) 6b of the elongated hole farthest from the support, the proximal end of the arm contacts the stopper. It is designed to open without opening.

The long hole 6 in the bearing piece 3 has an inclined outer end 6b slightly higher than the inner end 6a, and the base end of the arm 2 is eccentric or spiral-shaped with respect to the center of rotation of the shaft 4 from the end surface to the lower surface. The curved cam surface 2b has a curved shape.

Therefore, when the arm is closed, the shaft 4 is located at the inner end 6a due to the inclination of the elongated hole, and when the arm is pulled up to open, the cam surface 2
b contacts the stopper 5 (dashed line in Figure 6), but if it continues to open (arrow hole in Figure 6), the cam surface 2b slides against the stopper, the arm is pushed outward, and the shaft 4 becomes long. It moves in the hole toward the outer end 6b (solid line and arrow B in FIG. 6).

When the cam surface 2b finishes passing through the stopper 5, the shaft 4 moves through the long hole to the inner end due to its inclination (see solid line in Fig. 7 and arrow D).Thus, the arm is pulled up and opened in one movement without pushing. be able to.

When drying food is hung on the open arm, or if a pulling force is accidentally applied to the arm after hanging, the upper surface 2a of the proximal end of the arm comes off the stopper 5 and returns to the closed position, causing the hung drying food to fall to the ground. There is a risk of contamination.

For this purpose, a protrusion 7 is provided on the upper surface of the proximal end of the arm, and the stopper has an engaging member 7 such as a downward groove or claw that engages with the protrusion 7.
' to prevent it from coming off the stopper when the arm is simply pulled straight in the longitudinal direction.

Therefore, when closing, before pulling the shaft 4 to position it at the outer end 6b of the elongated hole, the arm is pulled up a small amount to disengage the protrusion 7 from its engagement with the groove or pawl.

Further, the bearing piece 3 and the stopper 5 may be fixed around the support column by adhesive or the like, but as in this embodiment, they are molded integrally with a cylinder body 8 that can be fitted into the support column and made of plastic. It is convenient to fit and fix the body 8 to the support because it does not require assembling time.

The cylinder 8 is a cylinder with a bottom whose upper end is closed when the arm 2 is provided at the upper end of the support as shown in the figure.

In this embodiment, the bearing pieces 3 are two pieces 3', 3 that protrude in parallel at intervals approximately equal to the width between both sides of the base of each arm.
The stopper 5 connects the upper parts of the bases of both pieces 3', 3' and is connected to the cylinder body 8.
Of course, the base of the arm may be bifurcated to sandwich both sides of the bearing piece.

Since the upper end of the bearing piece 3 is open and the lower end is provided with a guide groove 9 that communicates with the elongated hole 6, the arm can be separated from the bearing piece and only the arms can be packed together in a small volume. The purchaser can insert the shaft from the guide groove 9 into the long hole 6, easily assemble it, and provide it at a low cost.

In this case, the guide groove 9 is connected to the inner end 6a of the elongated hole where the shaft 4 is always located.
By not communicating with the arm, the arm will not come off unexpectedly when in use or when not in use.

Furthermore, if you accidentally break your arm while using it, you can purchase just the arm at a low price and replace the attachment.

Each tip of the shaft 4 is provided with an elongated protrusion 4' that crosses the center of the shaft in a specific direction, and the bottom of the opposing guiding groove 9 has a narrow groove 9' through which the protrusion 4' passes. is provided in the same direction as the guide groove 9, and when the arm is held in the open state as in this embodiment, it will protrude in a direction that does not allow the arm to grasp it (dotted line in Fig. 7) when the arm is held diagonally upward in normal use. By passing the part 4' through the narrow groove 9' (arrow C in Fig. 7) and introducing the shaft 4 into the elongated hole 6 through the guide groove 9, it is possible to prevent the arm from accidentally separating during normal use. This is convenient and can be reliably prevented.

In this case, the narrow grooves 9' may be formed in the portions 3' projecting outward from each side of the bearing piece.

In actual practice, the support 1 can be made of a relatively thin but rigid round or square pipe made of metal or plastic, and the arm 2 and the bearing piece 3 integral with the cylinder 8 are made of plastic molded parts. It is preferable that

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a partially sectional side view, Fig. 2 is a side view of the base of the arm, Fig. 3 is a plan view of the base of the arm, and Fig. 4 is a side view of the base of the arm. The figure is an enlarged plan view with the arm closed, Fig. 5 is an enlarged perspective view of the minus part of the above, Fig. 6 is an explanatory diagram of the arm in the middle of opening, and Fig. 7 is an explanatory diagram with the arm open. In the figure, 1 is a column, 2 is an arm, 3 is a bearing piece, 4 is a shaft, 5 is a stopper, 6 is a long hole, 6a is the inner end of the long hole, and 6b is the outer end. show.

Claims (1)

[Claims for Utility Model Registration] A bearing piece protruding radially outward is provided around the support column,
In a radial opening/closing device for an arm relative to a support, the shaft of the base of the arm is pivoted to the bearing piece so that the arm can be opened and closed radially relative to the support, and the arm normally hangs down from the bearing piece due to its own weight and is closed. The bearing piece has an inner end close to the support and an outer end remote from the support. A long hole and a guide groove whose lower end communicates with the long hole and whose upper end is open in order to pass the shaft through the long hole are provided, and the arm can be separated into bearing pieces by passing the shaft into and out of the long hole through the guide groove. A stopper is provided on each arm and protrudes from around each arm to catch the upper surface of the proximal end of the arm and keep it open when the closed arm is pulled up and opened. A retaining device is provided between the base end and the stopper that engages with each other when the arm is opened to prevent the arm from moving away from the support. A cam is provided that slides against the stopper and moves the shaft toward the outer end of the long hole when it is positioned at the end and opened, and when the shaft is positioned at the inner end of the long hole and the arm is pulled up, the cam is moved before the arm opens. The cam at the base end of the arm slides on the stopper, and when the shaft is positioned at the outer end of the elongated hole, the cam is released from the stopper to open and close the arm. ``Radial opening/closing device for the arm relative to the column.