JPS61233184A - Hinge device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] <Minute hand for industrial use> 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 in one direction.

<Conventional technology> The cabinet body of a copying machine contains heavy parts.
Some hinge devices that open and close such heavy objects are generally biased by springs to rotate in the opening direction to reduce the force of lifting them by hand. There is something. 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 21b, 22a and 22b formed by bending both ends of an elastic round bar, and bent parts 21c and 22c so as not to come into contact with each other at the intersection point in the center and become unrotatable. It is composed of two toes, a B bumper 21.22, and a pair of hinge fittings 30.40, in which the two metal fittings are pivotally connected to each other so as to be rotatable relative to each other around a bearing unit. .

The shaft portion of the torsion bar 21 near the crank portion 21a passes through the bearing of the hinge metal fitting 30 through the unit 50 so as to be rotatable, and the end of the crank portion 21a passes through the locking portion of one metal fitting 30a of the hinge metal fitting 30. 31, and the shaft part near the crank part 21b is rotatably passed through the bearing unit 60 of the hinge metal fitting 40, and the end of the crank part 21b is connected to the other metal fitting 4 of the hinge metal fitting 40.
It is attached by being locked to the locking part 42 of 0b. Also,
The torsion bar 22 is mounted in the same manner as the torsion bar 21 described above, intersecting at the center.
The other metal fitting 3 of the end hinge metal fitting 30 of the crank part 22a
Qb to the locking part 32, and the end of the crank part 22b to the 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. It is locked.

This hinge device 100 has one metal fitting 30a.

40a is fixed to the movable member, and the other metal fitting 30b.

40b is fixed to a fixing member, and one metal fitting 30a.

40a rotates in the direction A in FIG. 8 to perform a hinge function.

<Problems to be Solved by the Invention> However, in such a conventional hinge device 100, in order to prevent the torsion bars 21, 22 from coming into contact with the intersection point at the center and becoming unable to rotate, the bent portions 21c, 2
2c, the structure becomes complicated and the machining of the torsion bar itself becomes troublesome, and in particular, it is difficult to control the overall length dimension.

The overall length of B is controlled by two torsion bars 2.
1. Due to variations in the length of 22 and/or variations in the bending accuracy of the bent parts 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 fitting is from the base T of the locking part that has the strongest resistance to the force P to the tip side T of the locking part that has the weakest resistance. This is important because the locking portion is easily deformed as shown by the two-dot chain line (the amount of movement of the torsion bar is the length of the torsion bar).

Means for Solving the Problems> The present invention was made by focusing on the problems of the conventional art, and it is possible to reduce the processing of the torsion bar itself by making the central part of the torsion bar a linear shaft part. In addition to making it easier to attach the torsion bar to the hinge metal fitting, the torsion bar can be attached by inserting the end of the locking part provided on one side of the torsion bar into the through hole drilled in the hinge metal fitting. It is an object of the present invention to solve the above-mentioned problems by easily absorbing variations in length dimensions by adjusting the degree of penetration of the ends of the locking parts.

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 1-jumpers each having a crank portion formed therein, a fixed fitting fixed to a fixed member, and a movable fitting fixed to a movable member are mutually rotatable about 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 pair of torsion bars. is rotatably supported through the respective bearings of the hinge fittings, and the end of the locking part of each of the above-mentioned 1-1 conditioners is inserted into the through hole drilled in each of the fixing fittings of the pair of hinge fittings. The present invention is characterized in that the ends of the crank portions of the torsion bars are latched onto protrusions provided on the respective 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 bracket 3 (4) and movable bracket 5 (6)
) are rotatably and coaxially attached to each other by a metal pipe 7 penetrated through a through hole drilled in each, and the metal pipe 7 is caulked to prevent removal (Fig. 4). reference). Reference numerals 8 and 9 indicate toe shifters, which have straight shaft portions 8a and 9a, respectively, and a U on one side of the shaft portion.
It has locking portions 8b, 9b which are bent into a letter shape, and crank portions 8c, 9c which are bent into a letter shape on the other side. These two torsion bars 8 and 9 are attached to a pair of hinge fittings 1 and 2 in the following manner. First, the torsion bar 8 connects the locking portion 8b and the shaft portion 8a near the crank portion 8C to the metal pipes 7 of the hinge fittings 1 and 2, respectively.
．． Bearings 10, 1 shown in FIG.
0 through the through-holes 10a, 10a, respectively, and the end of the locking part 8b is inserted into the through-hole 3a drilled in the fixing fitting 3 of the hinge fitting 1, and The end portion 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 its length direction opposite to that of the torsion bar 8 described above, and is attached to the pair of hinge fittings 1 and 2 with the shaft portion 9a held parallel to the shaft portion 8a. Ru. That is, the torsion bar 9 connects the locking part 9b and the shaft part 9a near the crank part 9c to the other through hole of the bearings 10, 10 inserted into the metal pipes 7.7 of the hinge fittings 2 and 1, respectively. 1
0a' and 10a', respectively, and the end of the locking part 9b is inserted into the through hole 4a drilled 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 2. It is latched onto a protrusion 5a formed on the movable metal fitting 5 of No.1. The crank part 8c (9c) of this torsion bar 8 (9) is latched by bending the crank part 8c (9c) into a figure 5 shape and then folding the central part inward as shown in this embodiment. Bend it so that the end becomes the protrusion 6a (5
It is best to make it hang at the base of a). This is because the base of the protrusion has higher rigidity than the tip. And the crank part 9C of this torsion bar (for example 9)
As shown in FIG.
The b side remains constant except that it changes from a solid line to a dotted line.

That is, variations in the length of the torsion bar 9 are absorbed by the extent to which the end of the locking part penetrates into the through hole formed in the fixing metal fitting 4, and the force point of the crank part 9c remains constant without variation. Retained.

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 8a and 9a.
are supported on both sides by common bearings 10, 10.

This bearing 10 has through holes 10a and 1 at eccentric positions.
Since the through hole 10a (1
The rotation is restrained by the end of the locking part 8b (9b) of the torsion bar 8 (9) that has passed through 0'a) and is locked by passing through the through hole drilled in the fixing metal fitting 3 (4). As a result, the mutual positional relationship of the shaft portions of the torsion bars 8 and 9 is determined. The mutual positional relationship of the torsion bars 8 and 9 in the negative bearing 10 is as shown in FIG. The relationship is like a slanted diagonal line. In this manner, 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.

Further, the relationship between the locking portions of torsion bars 8 and 9 on the same side and the crank portion is as shown in FIG.
The length direction is positioned so that a clearance C is maintained between the outer surface of the crank part 9c (8C) and the inner surface of the crank part 9c (8C), and thereby the torsion bars 8 and 9
The movable metal 85 (6) maintains the clearance C over the entire movable range without buffering each other and operates smoothly.

The hinge device assembled as described above is mounted by fixing the fixed fittings 3 and 4 to the fixed member and the movable fittings 5 and 6 to the movable member, and prevents rotation of the movable member in the P2 direction. When the torsion bars 8 and 9 are twisted, a spring force in the opposite direction to the & 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 metal fittings 5 and 6 may be screwed to the upper cabinet, and the fixed metal fittings 3 and 4 may be screwed to the lower cabinet. This upper cabinet typically has a movable original image on its upper surface.

In addition, 11 in FIG. 6 is a stopper provided on the fixed metal fitting 3 (4), and the projection 12 of the movable metal fitting 5 (6) comes into contact with the stopper 11, thereby regulating the maximum inclination angle of the movable metal fitting 5 (6). be done. Also, when attaching the torsion bar 8 (9) to the hinge fitting 3 (4) in a twisted state, the movable fitting 5 (6)
), its protrusion 12 comes into contact with the stopper 11 of the fixture 3 (4) and its rotation is stopped, so the torsion bar is held in a twisted state at the torsion angle corresponding to the contact position. can. 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 portions of the torsion bar straight and avoid interference seen in conventional products. The process itself becomes extremely easy. Furthermore, the structure for attaching the torsion bar to the hinge fitting is such that the end of the U-shaped locking part provided on one side of the torsion bar is inserted into a through hole drilled in the hinge fitting. By adjusting the degree of penetration of the end of the locking part according to the variation in length, the variation can be easily absorbed, and as a result, even if the variation occurs, the parallelism of the pair of hinge fittings can be maintained. It can be pulled out with high accuracy, and 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 (which has strong resistance to external force) (the point of effort is always constant). Deformation of the metal fittings can be prevented as much as possible.

[Brief explanation of the drawing]

FIG. 1 is a partially omitted overall front view of a hinge device according to the present invention, FIG. 2 is a side view taken in the direction of the Z arrow in FIG. 1, FIG. 3 is a perspective view of a bearing of the hinge device, and FIG. 4 is a cross-sectional view of the main part of the bearing part of the above hinge device, FIG. 5 is a schematic diagram for explaining the usage state of torsion bars of different lengths of the above hinge device, and FIG. 6 is a diagram showing the movable range of the above hinge device. For explanation purposes, FIG. 1 is a schematic view taken in the direction of the Z arrow, FIG. 7 is a partially omitted and broken overall front view of a conventional hinge device, FIG. 8 is a side view of the same hinge device as seen in the Y direction, and FIG. 9 10 is a schematic front view for explaining the problems of the above hinge device, and FIG. 10 is a schematic plan view of the main part as viewed from arrow W in FIG. 7 for explaining the problems of the above hinge device. 1.2・Hinge metal fittings, 3,4・・Fixing metal fittings, 3a, 4a・
・Through hole, 5, 6... Movable metal fitting, 5a, 6a... Projection, 7 ・Metal pipe (bearing) 8.9... Torsion bar, 8a, 9a ・Linear shaft part, 8b, 9b ...Locking part, 8c, 9c - Crank part, 10 - Bearing Patent applicant NHK Spring Co., Ltd. Patent attorney Hideaki Sato, // Patent attorney Hideo Ohashi

Claims (1)

[Claims] (1) One has a linear shaft, a locking part bent into a U-shape on one side of the shaft, and a crank part bent into an L-shape on the other side of the shaft. The torsion bar consists of two torsion bars, one of which is fixed to a fixed member, and the other of which is fixed to a movable member, and a pair of hinged metal fittings that are pivotally connected to each other so as to be rotatable about 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 pass through the respective bearings of the pair of hinge fittings. The end of the locking part of each torsion bar is inserted into a through hole drilled in each of the fixing fittings of the pair of hinge fittings, and the crank part of each torsion bar is supported in a rotatable manner. A hinge device characterized in that the end portions are latched onto protrusions provided on each of the movable metal fittings of the pair of hinge metal fittings.