JPH0536591B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a hinge device attached to a pivot point of a movable member that rotates around a pivot shaft, and in particular, the invention relates to a hinge device that is attached to a pivot point of a movable member that rotates around a pivot shaft. This invention relates to a hinge device that rotates.

<Prior art> The main body of a copying machine cabinet contains heavy parts and is a heavy object, but hinge devices that open and close such heavy objects are generally designed to reduce the force of lifting by hand. To do this, some hinges are biased by a spring to rotate in the opening direction. Among the various springs used to assist the rotation of the hinge, torsion bars are widely used because they are inexpensive.

As this hinge device, those shown in FIGS. 7 and 8 have been developed. This hinge device 100 has crank parts 21a and 21 by bending both ends of an elastic round rod.
b, 22a and 22b, and bent portions 21c and 22c are formed at the intersection points of the central portions so as not to contact each other and become unrotatable; and two metal fittings. is composed of a pair of hinge fittings 30 and 40 which are pivotally connected to each other so as to be rotatable about the bearing unit.
And the torsion bar 21 is the crank part 21
The shaft part near a is attached to the bearing unit 5 of the hinge fitting 30.
0 in a rotatable manner, and the end of the crank portion 21a is connected to one metal fitting 30 of the hinge metal fitting 30.
a, and the crank part 21
The shaft portion near b is attached to the bearing unit 60 of the hinge fitting 40.
The end of the crank portion 21b is inserted into the other metal fitting 40b of the hinge metal fitting 40.
It is attached by being locked to the locking part 42 of. Further, the torsion bar 22 is mounted in the same way as the torsion bar 21 described above so as to intersect at the center, and the end of the crank part 22a is locked to the locking part 32 of the other metal fitting 30b of the hinge metal fitting 30. and the end of the crank part 22b is locked to a locking part (not shown; similar structure to the locking part 31 of the hinge metal fitting 30) of one metal fitting 40a of the hinge metal fitting 40. In this hinge device 100, one of the metal fittings 30a, 40a is fixed to a movable member, the other metal fittings 30b, 40b are fixed to a fixed member, and one of the metal fittings 30a, 40a is rotated in the direction A in FIG. Performs hinge function.

<Problems to be solved by the invention> However, such a conventional hinge device 100
In this case, bending portions 21c and 22c must be provided to prevent the torsion bars 21 and 22 from coming into contact with the intersection point at their central portions and becoming unable to rotate, and the structure becomes complicated accordingly, making it difficult to process the torsion bars themselves. This poses a problem in that it is troublesome, and in particular, it is difficult to control the overall length dimension. This overall length dimension control is achieved by using two torsion bars 2.
Due to variations in the lengths of the hinges 1 and 22 and/or variations in the bending precision of the bent portions 21c and 22c provided at the center, the pair of hinge fittings 30 and 40 may not be able to maintain parallelism as shown in FIG. , as shown in Fig. 10, the locking position of the crank part of the torsion bar with respect to the locking part of the hinge metal is from the base _T1 of the locking part that has the strongest resistance to the force P to the tip side T of the locking part that is weaker in the resistance. ₂ (at this time, l is the amount of movement due to the lengthening of the torsion bar),
The locking portion is important because it is easily deformed as shown by the two-dot chain line.

<Means for Solving the Problems> The present invention has been made by focusing on such conventional problems, and it is possible to easily process the torsion bar itself by making the central part of the torsion bar a straight shaft part. At the same time, variations in the length of the torsion bar can be prevented by attaching the torsion bar to the hinge fitting by inserting the end of the locking part provided on one side of the torsion bar into a through hole drilled in the hinge fitting. It is an object of the present invention to easily absorb the above problem by adjusting the degree of penetration of the end of the locking part.

In order to achieve the above object, the present invention has a straight shaft, a locking part bent in a U-shape on one side of the shaft, and a locking part bent in an L-shape on the other side of the shaft. Two torsion bars each having a formed crank portion, a fixed metal fitting fixed to a fixed member, and a movable metal fitting fixed to a movable member are pivotably connected to each other around a bearing. The two torsion bars have their lengths oriented in opposite directions, and their straight shafts are parallel to each other, so that both sides of the two straight shafts are connected to the hinges. The torsion bars are rotatably supported through the respective bearings, and the ends of the locking portions of the torsion bars are inserted into through holes drilled in the respective fixing fittings of the pair of hinge fittings, and each of the torsion bars is rotatably supported. It is characterized in that the end of the crank part is latched onto a protrusion provided on each of the movable metal fittings of the pair of hinge metal fittings.

<Examples> The present invention will be described in detail below based on illustrated examples.

In FIGS. 1 and 2, reference numerals 1 and 2 indicate a pair of hinge fittings, each of which is comprised of fixed fittings 3, 4 and movable fittings 5, 6. Fixed metal fittings 3, 4
The movable fittings 5 and 6 are rotatably and coaxially attached to each other by means of metal pipes 7 passed through through-holes drilled in each, and the metal pipes 7 are caulked to prevent them from coming off. (See Figure 4). Reference numerals 8 and 9 denote torsion bars, each having straight shaft portions 8a and 9a, with crank portions 8c and 9c bent into a U-shape on one side, and bent into a substantially L-shape on the other side. It is equipped with crank parts 8C and 9C. These two torsion bars 8 and 9 are connected to a pair of hinge fittings 1 and 2 as follows.
is installed on. First, the torsion bar 8 has the locking part 8b and the shaft part 8a near the crank part 8c inserted into the metal pipes 7 and 7 of the hinge fittings 1 and 2, respectively, and the bearings 10 and 1 shown in FIG.
0 through the through-holes 10a, 10a, respectively, and the end of the locking part 8b is penetrated into the through-hole 3a drilled in the fixing metal fitting 3 of the hinge metal fitting 1, and the end of the crank part 8c is latched onto a protrusion 6a formed on the movable metal fitting 6 of the hinge metal fitting 2. On the other hand, the torsion bar 9 has a length direction opposite to that of the torsion bar 8 described above, and has a shaft portion 9.
A is held parallel to the shaft portion 8a and attached to the pair of hinge fittings 1 and 2. That is, the torsion bar 9 has a shaft portion 9 near the locking portion 9b and the crank portion 9c.
a is rotatably passed through the other through holes 10a', 10a' of the bearings 10, 10 inserted into the metal pipes 7, 7 of the hinge fittings 2 and 1, respectively, and the locking part 9b The end of the crank part 9c is inserted into the through hole 4a formed in the fixing metal fitting 4 of the hinge metal fitting 2, and the end of the crank part 9c is inserted into the hinge metal fitting 1.
It is latched onto a protrusion 5a formed on a movable metal fitting 5. Crank part 8 of this torsion bar 8, 9
As shown in this embodiment, the latches c and 9c are made by bending the crank parts 8c and 9c into an L-shape, and then bending the center part slightly inward, so that the ends thereof are attached to the protruding parts 6a and 5a. It is best to hang it at the base of the . This is because the base of the protrusion has higher rigidity than the tip. Even if the length of the torsion bar 9 becomes longer, the latching position (point of force) of the crank part 9c of this torsion bar (for example, 9) only changes from the solid line to the dotted line on the latching part 9b side of the torsion bar, as shown in FIG. is constant. That is, variations in the length of the torsion bar 9 are absorbed by the extent to which the end of the locking part b penetrates into the through hole formed in the fixing fitting 4, and the force point of the clamp part 9c remains constant without variation. is maintained.

The bearing 10 is made of, for example, a synthetic resin material in order to prevent noise from occurring.

In this way, the torsion bars 8 and 9 have their shaft portions 8
Both sides of a and 9a are supported by common bearings 10 and 10.

This bearing 10 has a through hole 1 in an eccentric position.
Since the through holes 10a and 10'a are provided in a protruding manner, the torsion bars 8 and 10'a passing through the through holes 10a and 10'a
The rotation of the torsion bars 8 and 9 is restrained by the end portions of the locking portions 8b and 9b penetrating and locking into the through holes protruding from the fixtures 3 and 4.
The mutual positional relationship of the shaft positions of the is determined. The mutual positional relationship of the torsion bars 8 and 9 in one of the bearings 10 is as shown in FIG. 2, as shown in FIG. The relationship is like a slanted diagonal line. In this way, the mutual positional relationship of the torsion bars 8 and 9 is such that their shaft portions are positioned as described above, and their shaft portions 8a
and 9a are held parallel.

Furthermore, the relationship between the locking parts of the torsion bars 8 and 9 on the same shaft and the crank part is as shown in FIG.
The longitudinal direction is positioned so that the clearance C is maintained between the inner surface of the movable fittings 5 and 6, and the torsion bars 8 and 9 maintain the clearance C without buffering each other in the entire movable range of the movable fittings 5 and 6. This will ensure smooth operation.

The hinge device assembled as described above is attached by fixing the fixed fittings 3 and 4 to the fixed member and the movable fittings 5 and 6 to the movable member.
P For rotation in _two directions, torsion bars 8 and 9
is twisted and a spring force in the opposite direction to the _P2 direction is accumulated. When the above-mentioned hinge device is attached to, for example, a cabinet of a copying machine which is divided into upper and lower parts, the movable fittings 5 and 6 may be screwed to the upper cabinet, and the fixed fittings 3 and 4 may be screwed to the lower cabinet. This upper cabinet usually has a movable document table on the upper side.

Incidentally, reference numeral 11 in FIG. 6 is a stopper provided on the fixed metal fittings 3, 4, and the protrusion 12 of the movable metal fittings 5, 6 comes into contact with the stopper 11, so that the maximum inclination angle of the movable metal fittings 5, 6 is regulated. In addition, torsion bar 8,
When the movable metal fittings 5, 6 are attached to the hinge metal fittings 3, 4 in a screwed state, the protrusions 12 of the movable metal fittings 5, 6 come into contact with the stopper 11 of the fixed metal fittings 3, 4 and their rotation is stopped, so the torsion bar can be attached to the hinge metal fittings 3, 4. It can be held in a twisted state with a twist angle corresponding to the contact position. If you attach it to the object in this state, you can attach it with the torque preset.

<Effects of the Invention> As explained above, according to the present invention, there is no need for complicated bending work to make the shaft portion of the torsion bar straight and avoid interference seen in conventional products. becomes extremely easy. In addition, since the torsion bar is attached to the hinge fitting by inserting the end of the U-shaped locking part provided on one side of the torsion bar into a through hole drilled in the hinge fitting, the length dimension of the torsion bar is By adjusting the degree of penetration of the ends of the locking portions according to the variations in the angle, the variations can be easily absorbed, and as a result, even if the above variations occur, the parallelism of the pair of hinge fittings can be adjusted In addition to being easy to pull out, the end of the crank part provided on the other side of the torsion bar can always be latched to the base of the protruding part of the hinge metal fitting (strong resistance to external force) (the point of force is always constant). Deformation can be prevented as much as possible.

[Brief explanation of drawings]

FIG. 1 is a partially omitted overall front view of a hinge device according to the present invention, FIG. 2 is a side view as viewed from the Z arrow in FIG.
Fig. 3 is a perspective view of the bearing of the above hinge device, Fig. 4 is a sectional view of the main part of the bearing part of the above hinge device, and Fig. 5 is for explaining the usage state of torsion bars of different lengths of the above hinge device. FIG. 6 is a schematic view taken along the Z arrow in FIG. 1 for explaining the movable range of the hinge device, FIG. 7 is a partially omitted and broken overall front view of the conventional hinge device, and FIG. 9 is a schematic front view for explaining the problems of the above hinge device, and FIG. 10 is a 7th view for explaining the problems of the above hinge device. FIG. 2 is a schematic plan view of the main parts of the vehicle as viewed from the W arrow. 1, 2...Hinge fittings, 3, 4...Fixing fittings, 3
a, 4a...Through hole, 5, 6...Movable metal fitting, 5
a, 6a... Protrusion, 7... Metal pipe (bearing), 8, 9... Torsion bar, 8a, 9a...
...Straight shaft portion, 8b, 9b...Locking portion, 8c, 9
c... Crank part, 10... Bearing.

Claims (1)

[Claims] 1. Two shafts each having a straight shaft, a locking part bent in a U-shape on one side of the shaft, and a crank part bent in an L-shape on the other side of the shaft. The torsion bar is composed of a pair of hinge fittings, one of which is fixed to a fixed member, and the other is fixed to a movable member, which are pivoted so as to be rotatable with respect to each other around a bearing. The torsion bar of this book has its length direction opposite to each other, and its straight shafts are parallel to each other, so that both sides of the two straight shafts pass through the respective bearings of the pair of hinge fittings and are rotatable. The end portions of the locking portions of the torsion bars are inserted into the through holes drilled in the respective fixing fittings of the pair of hinge fittings, and the ends of the crank portions of the torsion bars are inserted into the respective fixing fittings of the pair of hinge fittings. A hinge device characterized in that the hinge device is mounted by being latched onto a protrusion provided on each movable metal fitting of the hinge metal fitting.