JPH0711829A - Blinding device with four-joint link - Google Patents

Abstract

PURPOSE:To enhance external values of commodities by a method wherein, in a blinding device with four-joint link, a gap which is formed between links so as to be expanded and contracted can be closed without disturbing the action of the links, thereby avoiding dangers such that fingers are clamped between the links. CONSTITUTION:A fixed link 1 and a movable link 2 are interconnected by two links 3, 4 to form a four-joint link. A link cover 9 which has a width larger than the interval L' of a gap between the links 3 and 4 during the operation of the four-joint link and which has a length nearly equal to the link 3 is provided in such a manner that one end 9a of the cover 9 is fixed and is rotatably mounted to either of the links 1, 2, while the other end 9b thereof is longitudinally slidably mounted to the link to which the end 9a is not mounted, so that the cover 9 is disposed along the side of the links 3, 4 so as to straddle the links.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a four-bar linkage mechanism adopted for hinges and the like, which can prevent the danger of pinching a finger or the like and can improve the appearance. That is, it relates to a blindfold device.

[0002]

2. Description of the Related Art Conventionally, hinges and the like used to open and close doors by rotating the door in a vertical direction with respect to a door mounting body in a cabinet or the like use a four-bar linkage mechanism. There is.

The above-mentioned four-section link mechanism (four-section link) is
As shown in FIGS. 5 and 6, the fixed link a and the movable link b are linked by two links c and d so as to be rotatable, and this constitutes a crank mechanism of the boom. In order to do so, the fixed link a is set to be long and the movable link b is set to be short, and even if there are two other links c and d, one of the links c is set to be long and the other link d is set to be short. Therefore, in the four-bar link, when rotating from the state shown in FIG. 5 to the state shown in FIG. 6, the enclosed space e is always formed between the two links c and d. , So that it can be opened and closed.

Therefore, when the door f is attached to the door attachment g so as to be freely opened and closed by the rotation using the hinge having the four-bar linkage incorporated therein, as shown in FIG.
In the state where the door is opened, a gap e formed between the two links c and d is opened to the front side of the opening h in the door mounting body g, which is closed during the door closing operation, and a fingertip or the like may be caught. There is. In particular, as shown in the figure, a tension spring i is stretched between a fixed link a and a movable link b, and this spring is used to close the door f.
In the case where the opening and closing force and the holding force for both opening and closing are obtained, when the door f reaches a predetermined turning angle, the door closing operation is suddenly performed, which further increases the risk. Get higher In addition, since the pivotal joints, springs, and other members inside the four-bar links are directly viewed from the outside through the gap e, the commercial value is also reduced from the external appearance.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the above-mentioned prior art.
In a four-bar link having a function as a lever crank mechanism, a link cover is rotatably attached to a fixed link and a movable link at one end so that the other end is slidable in the longitudinal direction. By linking, the two links pivotally attached to the fixed link and the movable link are arranged laterally across the two links, and the gap between the two links is thereby provided. Closed to ensure safety and to have an excellent appearance, and by making the link cover function as a reinforcing material, it is possible to use the smallest width for each link, which reduces cost. However, the purpose is to provide it at a relatively low cost.

[0006]

In order to achieve the above-mentioned object, the present invention provides a four-bar link in which a fixed link and a movable link are connected by two links so that the fixed link and the movable link are rotatable. , One end of a link cover is rotatably attached to one of the movable links, and the other end is connected to the other end so as to be slidable in the longitudinal direction. Is a blindfold for a four-bar link, which is arranged along the longitudinal direction on the side of the two links so as to close the gap between the two links. It is intended to provide a device.

[0007]

A pair of left and right four-bar links are prepared, and the fixed links are fixed to the left and right compatible frames of a door mounting body such as a cabinet by screws or the like near the opening in the upper inner surface thereof. On the other hand, each movable link is on both the left and right sides in the lateral width direction of the door, and is fixed to the upper inner surface with screws or the like, whereby the door is attached to the opening of the door mounting body.
It is attached so that it can be opened and closed by pivoting in the vertical direction.

When the door is opened by rotating it upward from the closed state, the two links connecting the fixed movable link and the fixed link to the door are rotated forward to open the door mounting body. The door is slanted forward and projected from the opening, and the door is opened upward and opened to a predetermined angle.At this time, one end of the link cover is attached to one of the fixed link and the movable link. Is pivotally attached and the other end is slidable in the longitudinal direction, so that one end of the link cover rotates,
As the other end slides in the longitudinal direction, the other end and the two links are projected forward in an inclined state from the opening of the door mounting body.

Therefore, between the two links, the state in which they are covered by the link cover from the side along the longitudinal direction thereof is maintained, and there is substantially no gap, so that the hand is inserted in this gap. The danger is gone and the appearance is good.

When the door is closed, one end of the link cover rotates and the other end slides in the longitudinal direction, which is opposite to the opening of the door. It will be pushed into the vertical state.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the illustrated embodiments. As shown in FIGS.
Is formed in a substantially U-shape in plan view with both front and top open. In the fixed link 1, the lower front portion and the upper rear portion (deep portion) of the left and right side plate portions 1a, 1a.
Is a long link 3 having a substantially U-shaped cross section,
One ends of the short links 4 are pivotally attached by shaft pins 5 and 6 so as to be rotatable.

The movable link 2 is formed by a front plate portion 2a and left and right side plate portions 2b, 2b into a substantially U-shaped cross section.
Protrusions 2c, 2c extending in parallel from the upper ends of the side plates 2b, 2b in the direction perpendicular to the longitudinal direction, and the base end 2 thereof.
The other ends of the long link 3 and the short link 4 described above are respectively attached to the shaft pins 7, 7, at d 2d and the tip portions 2e 2e.
It is rotatably pivoted at 8 and 8 to form a four-bar link.

In the above-structured four-bar link, the blindfold device is constructed as follows. As shown in FIGS. 1 to 4, a plate-like link cover 9 having a length substantially equal to that of the long link 3 has one end 9a at the protruding portion 2c of the movable link 2, A long link 3 and a short link 4 are rotatably pivoted by a shaft pin 10 between a base end portion 2d and a tip end portion 2e on which the long link 3 and the short link 4 are pivoted, respectively, and the other end 9b is long in the longitudinal direction. The long groove 9c which is opened is formed, and the side plate portion 1 in the fixed link 1 described above is formed in this.
A short shaft 11 projecting from the inner surface of a is engaged so as to be rotatable and slidable in the longitudinal direction. Thus, the link cover 9 has a long link 3 and a short link. By being disposed over the link 4, the space between the links 3 and 4 is covered from the outside, as clearly shown in FIG. 1, and thus is formed between the links 3 and 4. The gap is configured to be closed.

As shown in FIG. 1, the lateral width L of the link cover 9 is wider than the maximum distance L'between the long and short links 3 and 4 by an appropriate dimension within the rotation range of the four-bar link. Therefore, it is preferable that the long and short links 3, 4 are completely covered with each other.

Further, the other end 9b of the link cover 9 is
And the short shaft 11 for slidably connecting the fixed link 1 to the fixed link 1 includes both long and short links 3, 4
Is provided between the shaft pins 5 and 6 pivotally connected to one end of the.

As described above, the pivot pin at the movable link 2 and the one end 9a of the link cover 9 serves as the pivoting means.
As shown in FIG. 4, the protrusion 12 with the split groove 12a is integrally provided on the center inner surface of the one end 9a of the link cover 9 as shown in FIG. It may be rotatably pivoted by being pushed into and fitted into a hole 2f formed in 2c.

In this embodiment, the link cover 9 has one end 9a pivotally attached to the movable link 2 and the other end 9b slidably connected to the fixed link 1. However, on the contrary, Of course, one end 9a may be slidably connected to the movable link 2 and may be pivotally attached to the other end 9b and the fixed link 1.

Further, the link cover 9 may be disposed only on one side of the link cover 9, depending on the usage of the four-bar link,
It may be arranged on both sides, but when it is arranged on only one side, both long and short links 3, 4 can be understood as understood from FIG. In the same figure, it may be arranged as described above on the front side, which allows the link cover 9 from the outside between the long and short links 3 and 4 of the four-bar link when the door is opened. Since it is straddled, there is no outward gap between the links 3 and 4.

To mount the door 13 using the four-bar link with the blindfold device described above on the door mounting body 14 such as a cabinet so as to be opened and closed by pivoting in the vertical direction, it is known. As in the case of the four-bar link, as shown in FIGS. 1 to 3, the fixed link 1 is fixed to the upper inner side of the standing frame 14a of the door mounting body 14 with screws 15 ..., On the other hand, the movable link 2 is fixed to the door. The screws 13 are fixed to the left and right side portions of the upper inner surface of 13 by means of screws, so that the door 13 is attached to the door mounting body 14 so as to be openable and closable.

In FIG. 1 to FIG. 3, reference numeral 17 is a tension spring tensioned between the lower end of the fixed link 1 and the upper end of the movable link 2 by tensioning the ends thereof. The opening and closing force and the holding force in the open and closed states are obtained.

[0021]

Since the present invention is configured as described above, since the space between the two links connecting the fixed link and the movable link is covered from the outside by the link cover, both the links are linked. Within the rotation range of the link, the gap between the links disappears, the danger of the above-mentioned conventional example is eliminated, and safety can be ensured, and the pivot joints and springs of the links inside the four-bar link, etc. Since it is blocked and cannot be viewed directly, the commercial value of the product can be improved.

Further, the link cover not only eliminates the gap between the two links but also serves as a reinforcing material for the four-bar link, so that the strong two links and the fixed link have the minimum width. However, there is no need to worry about the strength, and by doing so, it is possible to provide the material at a relatively low cost by reducing the material cost.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view in which a part of a use state of a door is cut away according to an embodiment of a blindfold device for a four-bar link according to the present invention.

FIG. 2 is a partially cutaway vertical side view showing a use state of a closed door according to the embodiment.

FIG. 3 is a front view showing a state in which a door is removed in the embodiment shown in FIG.

FIG. 4 is a perspective view of the above embodiment in an exploded state.

FIG. 5 is a partially cutaway vertical side view showing a state in which a door is used in a conventional four-bar linkage.

FIG. 6 is a vertical cross-sectional side view showing a state in which a door is used in the conventional example as described above with a part thereof cut away.

[Explanation of symbols]

 1 fixed link 2 movable link 3 link 4 link 9 link cover 9a one end of link cover 9b other end of link cover

Claims (1)

[Claims] 1. A four-bar link in which a fixed link and a movable link are rotatably connected by two links, wherein one of the fixed link and the movable link has one end of a link cover rotated. The other end of the link cover is slidably connected to the other in a longitudinal direction, and the link cover straddles the above two links, and between the two links. A blind joint device for a four-joint link, which is arranged laterally so as to close the gap and arranged along the longitudinal direction.