JPH0480189B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a torsion adjustment device for a torsion bar attached to a door.

(b) Prior art 1 shown in Fig. 1 is a plate body 1A made of transparent glass or the like;
A metal frame 1B fitted into the periphery of this plate
2 is a metal surrounding frame arranged at the opening of a box such as an article storage. Reference numeral 3 denotes a torsion bar made of a metal rod, and most of it except for its lower end is housed in the frame 1B in the vertical direction, and its upper end is fixed to the frame within the frame. Reference numeral 4 denotes a cylindrical metal rotating member whose center is fixed to the lower end of the torsion bar by means such as welding, and has a large number of holes 5 extending from the center toward the sides.
A, 5B, . . . are formed radially at equal intervals. 6
is a pedestal fixed to the surrounding frame 2 so as to be located directly below the rotating member, and on which the rotating member 4 is rotatably mounted; and a horseshoe-shaped protrusion 7 serving as a guide for the rotating member.
A recess 8 is defined by this protrusion and accommodates the rotating member. Parts of the holes 5A, 5B, . . . of the rotating member are exposed to the outside from between both ends of this protrusion. 9 shown by the chain line is torsion bar 3
Adjustment rods 10 for applying a certain twist to the torsion bar 3 are stopper pins for maintaining the twist of the torsion bar 3, and are inserted into holes 5A, 5B, . . . of the rotating member 4, respectively.

When the torsion bar is given a certain twist,
The repulsive force generated by the twisting serves to automatically open or close the door 1.

To twist the torsion bar 3, for example, insert the adjustment rod 9 into the hole 5A, turn the adjustment rod in the direction of arrow A, rotate the rotating member 4 by a certain angle, and twist the torsion bar 3 to a predetermined degree. In the applied state, the stopper pin 10 is inserted into the hole 5C as shown in FIGS. 1 and 2, and this stopper pin is brought into contact with one end of the protrusion 7, thereby obtaining a repulsive force in the direction of arrow B on the torsion bar 3. I can do it. Incidentally, the adjustment rod 9 may be removed from the hole 5A after twisting the torsion bar 3.

According to such a torsion adjustment device, it is possible to apply a predetermined twist to the torsion bar 3 and use the repulsive force to automatically open or close the door 1, but on the other hand, the following drawbacks occur.

Since the fulcrum that maintains the torsion of the torsion bar 3 is one point length of the stopper pin 10, the repulsive force concentrates on the rotating member 4, causing the stopper pin 10 or the hole 5C to deform, or the stopper pin 10 to come out of the hole 5C. This is unreliable and mechanically undesirable.

Since both the adjustment rod 9 and the stopper pin 10 are used to twist the torsion bar 3, the adjustment work becomes complicated.Moreover, when readjusting the torsion, the stopper pin 10 must be removed and the adjustment rod 9 must be used to twist the torsion bar 3 again. This process requires time and effort.

In order to fix the pedestal 6 to the surrounding frame 2, the door 1
The door itself tilts slightly due to the weight of the door, and the torsion bar 3, which becomes non-vertical due to this tilt, cannot be corrected vertically, so the service life of the torsion bar is shortened.

(c) Purpose of the invention The present invention aims to solve the drawbacks of the prior art.

(d) Structure of the invention A torsion bar disposed inside a door that freely opens and closes an opening of a box body, etc., and this torsion bar 3.
A pedestal having a worm gear attached to one end, a recess for rotatably housing the worm gear, and a worm that meshes with the worm gear housed in the recess at several points, and attached to the edge of the opening. and a mounting device for movably supporting the pedestal.

(E) Embodiments of the Invention FIGS. 3 to 4 show embodiments of the present invention, and the same reference numerals as in FIGS. 1 and 2 are the same in FIGS. 3 to 4.

Reference numeral 11 shown in FIGS. 3 and 4 is a cap fixed to the lower end of the torsion bar 3 by means such as welding, and has a large number of projections 12 formed in the vertical direction on its inner surface. Reference numeral 13 designates a worm gear having a large number of teeth 14 on its circumferential surface, and has a polygonal engaging portion 15 formed on its upper surface that is covered with and engages with the cap, and is connected to a base 6. It is rotatably housed in the recess 8 of. A worm 16 is rotatably supported at both ends of the protrusion 7, and the feed screw 17 is connected to the worm gear 13 housed in the recess.
It meshes with the teeth 14 of. Reference numeral 18 denotes holes formed on both left and right sides of the base 6. Reference numeral 20 shown in FIGS. 5 and 6 is a mounting device that movably supports the pedestal 6. A screw hole 21 facing the hole 18 of the pedestal is formed in one side wall, and a fastener 22 such as a rivet is provided.
A fixture 23 is fixed to the surrounding frame 2, which is the edge of the opening, and is covered by the pedestal 6, and the screw is passed through the hole 18 and the screw hole 21 so as to be parallel to the door 1 in the closed state. an adjustment screw 24 screwed into the hole;
It consists of a fitting member 25 such as an E washer fitted onto the adjusting screw 24 in order to cause the adjusting screw and the base 6 to move together in the left-right direction.

7 and 8 show another embodiment of the invention, in which the mounting device 19 includes two adjusting screws 24A, 24.
B are mounted in an orthogonal relationship, and the opposing holes 18A and 18B on the left and right and front and rear sides of the pedestal 6 are made into elongated shapes, and the pedestal 6 can be adjusted in the left and right direction and front and back by turning the adjustment screws 24A and 24B to the left or right. It is designed to be able to move in any direction.

According to such a configuration, the worm gear 13 is housed in the recess 8 of the pedestal 6, so that the worm 16
The engaging portion 15 of the worm gear 13 engages with the worm gear 13.
The torsion bar 3 can be supported by the length that connects and connects the cap 11 of the torsion bar 3 to the torsion bar 3, and by turning the worm 16 to the left or right, the worm gear 13 rotates and the torsion bar 3 can be twisted. Since the degree of torsion of the torsion bar 3 can be adjusted only by operating the worm 16, the degree of torsion can be adjusted very easily.Moreover, since the teeth 14 of the worm gear 13 and the feed screw 17 of the worm 16 engage at several places, There are many fulcrums between the worm gear 13 and the worm 16, and mechanical strength can be improved.
Further, since the base can be moved by turning one or both of the adjustment screws 24A and 24B of the mounting device 19 to the left or right, even if the torsion bar 3 is tilted, it can be corrected vertically.

(f) Effects Since the present invention is configured as described above, the effects listed below are produced.

As the worm rotates, the worm gear rotates and the torsion bar is twisted, making it extremely easy to adjust and readjust the degree of torsion of the torsion bar.

Since the feed screw of the worm and the teeth of the worm gear engage at several places, the mechanical strength against torsion of the torsion bar is improved and durability is increased.

Since the pedestal can be moved while supporting the torsion bar by the mounting device, the torsion bar can be easily maintained vertically.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main part showing the prior art, Fig. 2 is a sectional view taken along line A-A' in Fig. 1, and Figs. 3 to 6 show embodiments of the present invention. Figure 4 is an exploded view of Figure 3, Figure 5 is a perspective view of the pedestal, and Figure 6 is an exploded view of Figure 3.
The figures are a sectional view taken along line B-B' in FIG. 5, FIG. 7 a perspective view of a pedestal showing another embodiment of the present invention, and FIG. 8 a sectional view taken along line C-C' in FIG. 3... Torsion bar, 6... Pedestal, 8... Recess, 13... Worm gear, 16... Worm,
19...Mounting device.

Claims (1)

[Claims] 1. A torsion bar placed inside a door that opens and closes the opening of a box, etc., a worm gear attached to one end of the torsion bar, a recess that rotatably stores the worm gear, and a recess that is stored in the recess. A torsion bar torsion adjustment device comprising a pedestal having a worm that engages with a worm gear at several places, and a mounting device attached to an edge of the opening to movably support the pedestal.