JP2003310405A - Supporting stand of screen or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a supporting stand of a screen or the like which stands steadily and has no forward bulging parts that give overbearing feeling to viewers, and which can be folded in a bar shape as a whole and in a small size convenient for carrying or storing. <P>SOLUTION: The supporting stand comprises a supporting rod 2, leg bodies 3 fitted to both ends on a lower face of the supporting rod 2 by first hinge mechanisms 5, ground-contacting pestles 4 fitted to lower ends of the leg bodies 3 by second hinge mechanisms 6, and lock members 7 fitted movably lengthwise to the lower face of the supporting rod 2. In a folding state, the leg bodies 3 overlap the lower face of the supporting rod 2, and in a drawing-out state, the leg bodies 3 protrude downward from the supporting rod 2, wherein both states are fixed by the lock member 7. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support base for supporting a screen or the like used for projecting images of various image devices such as slides, videos, liquid crystal projectors, OHPs, etc. in conferences, meetings, homes and the like. .

[0002]

2. Description of the Related Art Several types of screens have been proposed for projecting images from various types of image equipment as described above, but they are foldable so that the components can be stored in a horizontally long case when not in use. The type of screen has the advantages that it is compact and convenient to carry and store.

In such a foldable screen, a support is prepared separately for holding the screen in an upright state when it is used, and the screen cloth should be pulled out upward when the case is placed on the support. become.

The support base uses various pipes and mold materials,
The legs support the horizontal support rods on which the case is placed, so that the legs can stand on their own. Of course, a folding structure is required for convenient carrying and storage.

As a conventional support base, for example, a pair of front support columns pivotally fixed to both ends of a support rod on which a screen is placed, and an upper end pivotally supported to the rear portion of the front support column are folded along the front support columns. It consists of a rear strut that can be opened backwards from the rear, and after the front strut is erected to open the rear strut, the support rods are horizontally arranged by connecting the front strut and the rear strut on both sides with a connecting rod. Something like that has been proposed.

[0006]

By the way, in the support base having the above-mentioned structure, the front support post and the rear support post extend forward and backward when erected, and this extension part occupies a wide space, and particularly the front support post. The overhang gives a feeling of intimidation to the viewer, and since the supporting rod and the front strut are in a right-angled relationship even when folded, there is a problem that they are inevitably bulky.

Therefore, an object of the present invention is to provide a good sense of stability when standing up, and to prevent the occurrence of a protruding portion forward.
It is to provide a support base such as a screen which is convenient for carrying and storing because it does not give an intimidating feeling to the viewer, and when folded, it becomes a single rod shape and is low in bulk.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is directed to a horizontally-long support rod and a support shaft provided with a first hinge mechanism at both end positions on the lower surface of the support rod. A leg body that is attached so as to rotate between a folded state in which it overlaps along the length direction of the lower surface of the leg, and a state in which it projects below the support rod, and a leg is attached to the lower end of the leg body by a second hinge mechanism. It is attached so that it can rotate from the state of overlapping along the length direction of the body so that it is arranged at a right angle at the lower end of the leg, and at the lower end of the leg so as to be rotatable around the axis of the leg. And a pair of lock members attached to the lower surface of the support rod so as to be freely movable in the longitudinal direction. The lock members have legs that project below the support rod. The first hinge mechanism can be freely engaged and disengaged with respect to the first hinge mechanism in the state. In a folded state in which the leg body is kept protruding below the supporting rod by the engagement with the supporting rod and the leg body overlaps the lower surface of the supporting rod, the leg body can be engaged with and disengaged from the second hinge mechanism. It adopts a configuration in which the legs are held in a folded state by engagement with the hinge mechanism.

In the first hinge mechanism, the hinge member fixed to the upper end of the base hinge leg fixed to the lower surface of the support rod is pivotally attached by an axis to support the leg on both sides of the base hinge. The lock member is formed by providing a support wall into which the leg fits when it is projected downward, and the lock member moves along a groove provided in the length direction so as to open at the lower surface of the support rod,
The support rod can be freely fixed at any position by tightening screws, and the opposite side walls on both sides have a width that fits over the base hinge. A pair of engaging portions consisting of a groove and a ridge is provided,
The lock member is provided with an abutting portion for contacting a leg protruding downward of the support rod in an engaged state with the base hinge.

Further, the second hinge mechanism is an upper hinge fixed to the lower end of the leg so that the ground rod can be arranged at a right angle at the lower end of the leg from the state where the ground rods are overlapped along the length direction of the leg. And a lower hinge member attached to the lower surface of the grounding rod are pivotally attached by an axis, and the grounding rod is attached to the lower hinge member so as to be rotatable in a plane, and the above hinges are provided on both sides of the upper hinge member. The lock member has a structure in which one of a pair of engaging portions including a groove and a protrusion is provided.

In a state where the leg is projected below the support rod at a right angle, the lock member is moved toward the corresponding first hinge mechanism, and the base hinge and the engagement provided on the opposite side walls on both sides. When the opposing side walls are externally fitted to the base hinge while the parts are engaged, the contact portion provided on the lock member contacts the outer surface of the leg body, and if the lock member is fixed to the support rod, The downward protruding state is fixed.

Further, in a state in which the leg is projected below the support rod at a right angle, the grounding rod overlapping the leg is rotated by 90 ° so as to be orthogonal to the leg, and the grounding rod is further attached. If it is rotated in a plane and arranged orthogonally to the support rod, the support stand can be stably self-supported by the grounding of the grounding rod.

The lower hinge member in the second hinge mechanism has a disc portion that overlaps the upper surface of the ground rod, and has a groove provided on the upper surface of the disc portion and a ridge provided on the outer surface of the upper hinge member. By the engagement of, the two states of the grounding rod orthogonal to the leg and the folded state are elastically held.

When the leg is folded on the lower surface of the support rod, the lock member is moved away from the first hinge mechanism, the grounding rod is folded, and then the second hinge mechanism of the leg folded on the lower surface of the support rod. When the opposite side wall is externally fitted to the upper hinge member while the locking member is brought close to the upper hinge member and the engaging portions provided on the opposite side walls on both sides are engaged, the contact portion provided on the lock member is The folded state of the legs is fixed by contacting the outer surface of the disc portion and fixing the lock member to the support rod.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, a support base 1 includes a horizontally long support rod 2 on which a screen is placed, and a pair of legs 3 and 3 provided at both lower ends of the support rod 2. , The grounding rods 4 and 4 respectively provided at the lower ends of the two legs 3 and 3, and the supporting rod 2 between the folding state in which the legs 3 and 3 are overlapped with the lower surface of the supporting rod 2 at a right angle downward. The first hinge mechanism 5 attached so as to be movable, and the grounding rods 4 and 4 to the lower ends of the legs 3 and 3 from the folded state overlapping the legs 3 and 3 to the lower ends of the legs 3 and 3. A second hinge mechanism 6 attached so as to enable orthogonal rotation and planar rotation centered on the axis of the legs 3 and 3, and two pieces attached to the lower surface of the support base 2. And the lock member 7 of FIG.

As shown in FIG. 3 (C), the support rod 2 is formed by using a long mold material having an upwardly U-shaped cross section and providing longitudinal grooves 8 on both sides of the lower surface. ,
The leg bodies 3 and 3 are square pipes having a width slightly smaller than that of the supporting rod 2, and are formed to have a length suitable for arranging a screen or the like in a range shorter than half of the supporting rod 2. , The ground rods 4 and 4 have the same width as the legs 3 and 3,
The structure is such that a lower surface open mold material having a length shorter than 3 is used, and semicircular end caps 9 are attached to both ends thereof.

The first hinge mechanism 5 is shown in FIGS.
As shown in FIG. 1, from the base hinge 11 fixed to the lower surface of the support rod 2 with the bolt 10, the hinge member 12 fixed to the upper end of the leg body 3, and the connecting bolt 13 pivotally fixing the base hinge 11 and the hinge member 12. The above-mentioned base hinge 11
A plurality of hinge pieces 15 at the top of the mounting block 14.
And supporting walls 16 into which the legs 3 fit when the legs 3 are projected below the supporting rods 2 on both sides of the lower portion so as to project toward the center of the supporting rods 2. The hinge member 12 has a fitting portion 17 for the end portion of the leg body 3.
A plurality of hinge pieces 18 that fit between the hinge pieces 15 are formed on the outer surface of the.

The base hinge 11 and the hinge member 12
Is formed by using, for example, a synthetic resin, and hinge pieces 15 and 18 fitted to each other are pivotally connected by a connecting bolt 13, so that the hinge member 12 uses the connecting bolt 13 as a fulcrum with respect to the base hinge 11. In addition to being rotatable, a locking projection 19 for holding the leg 3 fitted between the support walls 16 in a retaining shape is provided on the opposing surface at the tip of the support wall 16. ing.

As another example shown in FIG. 8, in FIG. 7, the side walls 31 of the lock member 7 are fitted onto the hinge pieces 15 on both outer sides, and the projections 35 of the side walls 31 are recessed into the groove 34 of the hinge piece 15. In FIG. 8, the outer hinge pieces 18 of the leg body 3 are directly provided with concave grooves 34 ', and the side walls 31 of the lock member 7 are fitted into the concave grooves 34'. The ridges 35 are configured to be engaged with the concave grooves 34 'of the hinge piece 18.

With the construction as shown in FIG. 8, the concave grooves 34 'provided on both outer hinge pieces 18 of the leg 3 and the projections 35 of the side wall 31 of the lock member 7 are directly engaged with each other, so that the structure shown in FIG. It is possible to engage in a stronger manner than the above configuration.

The second hinge mechanism 6 is shown in FIGS.
2, an upper hinge member 20 fixed to the lower end of the leg 3 and a lower hinge member 2 attached to the upper surface of the ground rod 4
The upper hinge member 20 is formed by pivotally attaching 1 to the outer surface of the fitting part 17 with respect to the lower end of the leg body 3,
The lower hinge member 21 is formed by projecting a plurality of hinge pieces 23, and the lower hinge member 21 has a plurality of hinge pieces 2 fitted between the hinge pieces 23 on the upper surface of the disk portion 24 overlapping the upper surface of the ground rod 4.
5, the upper hinge member 20 and the lower hinge member 21 are formed of, for example, synthetic resin,
Connect the hinge pieces 23 and 25 fitted together to the connecting bolt 2
By pivotally engaging at 2, the lower hinge member 21 is rotatable with respect to the upper hinge member 20 with the connecting bolt 22 as a fulcrum.

The disk portion 24 of the lower hinge member 21 is
The disc portion 24 and the earthing rod 4 are overlapped with each other at a position slightly deviated to one side in the longitudinal direction with respect to the upper surface of the earthing rod 4.
At the center position of the grounding rod 4, the circular seat plate 26 stacked on the lower surface of the grounding rod 4 is sandwiched between the grounding rod 4 and the bolt 27, and the grounding rod 4 is rotatable around the bolt 27 with respect to the lower hinge member 21. It has become.

Therefore, the ground rod 4 is connected to the leg 3 by the connecting bolt 22 of the upper hinge member 20 and the lower hinge member 21.
Can be rotated in the same direction as the rotation of the leg 3 with respect to the support rod 2, and when the lower end of the leg 3 is orthogonal to the longitudinal direction of the leg 3, the bolt 27 It becomes possible to rotate around.

Due to such a combination of two rotations, the grounding rod 4 is in a folded state in which the grounding rod 4 overlaps the outer surface of the leg 3 along the lengthwise direction and is orthogonal to the leg 3 at the lower end of the leg 3. However, the posture can be changed so that the length direction thereof is in the ground contact state with the support base 1 oriented in the front-back direction.

In a folded state in which the grounding rod 4 is overlapped with the outer surface of the leg body 3 along the lengthwise direction, and the lower end of the leg body 3 is covered with the leg body 3.
A groove 28 parallel to the coupling bolt 22 is provided so as to pass through the center on the upper surface of the disk portion 24 so that the two states orthogonal to the above can be stably retained, and the hinge piece 23 of the upper hinge member 20 is provided. When the grounding rod 4 is in a folded state in which the grounding rod 4 overlaps the outer surface of the leg body 3 along the length direction,
The protrusion 29 that elastically engages the groove 28 by utilizing the elasticity of the synthetic resin and the elastic force to the groove 28 when the grounding rod 4 is orthogonal to the leg 3 at the lower end of the leg 3. Ridge 3 that engages with
0 is provided.

The two lock members 7 attached to the lower surface of the support rod 2 are a pair of opposing side walls 31 and both side walls 31 which are fitted into the longitudinal grooves 8 provided on the lower surface of the support rod 2. Is formed in a U-shape upward with a bottom wall 32 that joins at the position of the lower edge, and a concave groove 33 that fits into the outer edge of the groove 8 is formed on the outer surface of the side wall 31, and the lower surface of the support rod 2 is formed. The side walls 31 that are mounted so as to slide in the lengthwise direction and that face each other on both sides project toward the corresponding first hinge mechanism 5 with respect to the bottom wall 33, and the facing surface of this projecting side wall 31 is the first side. Of the base hinge 11 of the hinge mechanism 5 of FIG.
On the fitting surface of (1), a pair of engaging portions including a horizontal groove 34 along the length direction of the support rod 2 on one side and a ridge 35 fitted on the groove 34 on the other side are provided.

The bottom wall 32 of the lock member 7 is provided on both sides of the end portion facing the corresponding first hinge mechanism 5.
Is brought close to the corresponding first hinge mechanism 5 and the pair of engaging portions are fitted to each other, there is provided an abutting portion 36 for the leg body 3 projecting downward of the supporting rod 2.

The distance between both outer hinge pieces 23 of the upper hinge member 20 in the second hinge mechanism 6 is set so that the opposing surfaces of the side walls 31 of the lock member 7 are fitted to each other, and the leg 3 is supported. In order to hold the folded state of the lower surface of 2 with this lock member 7, a concave groove 37 with which the projection 35 of the side wall 31 is engaged is provided on the outer surface of the both outer hinge pieces 23.

The locking member 7 has bolts 38 installed between opposing side walls 31 so that the locking member 7 can be fixed at a desired position on the lower surface of the supporting rod 2, and by tightening the bolts 38, the supporting rods 2 are supported by the side walls 31 and 31. It can be fixed by sandwiching between the grooves 8.

The support base of the present invention is constructed as described above, and a method of using it will be described below.

1A and 1B show a folded state in which the support base 1 is not used, and the legs 3, 3 are folded along the length direction of the lower surface of the support rod 2 so as to overlap each other, and the grounding rod is shown. 4,
4 is overlapped along the lower surface length direction of the legs 3 and 3, and the locking members 7 and 7 are the second members located at the lower ends of the corresponding legs 3 and 3.
3, the side wall 31 is fitted onto both outer hinge pieces 23 so that the protrusion 35 engages with the groove 37, and is fixed to the support rod 2 by tightening the bolt 38. As a result, the leg bodies 3 and 3 are kept in a folded state on the lower surface of the support rod 2.

In this way, the support base 1 is in the form of a single rod in the folded state, which is extremely low in bulk, which is convenient for transportation and storage.

In order to raise the support base 1 from the folded state, the bolt 38 is first loosened to release the fixing of the lock member 7 to the support rod 2, and then the lock member is slid to the central portion of the support rod 2. Then, the engagement with the second hinge mechanism 6 is released, the leg 3 is rotated downward in this state, and when the leg 3 is at a right angle with respect to the support rod 2, as shown in FIGS. 5 and 8. The upper end portion of the leg body 3 elastically passes through the locking projection 19 of the support wall 16 provided in the first hinge mechanism 5 to support the support wall 16
Then, in this state, the lock member 7 is slid to approach the first hinge mechanism 5, and as shown in FIG.
1 is externally fitted to both outer hinge pieces 15, and the ridge 35 is a groove 34.
, The contact portion 36 comes into contact with the outer surface of the leg 3, and then the bolt 38 is fixed to the support rod 2 to fix the state where the leg 3 is pulled out below the support rod 2. To do.

Next, as shown in FIG. 10, the grounding rod 4 overlapping the outer surface of the leg 3 is rotated about the connecting bolt 22 of the second hinge mechanism 6 as a fulcrum so as to be perpendicular to the leg 3. The groove 28 and the projection 30 engaging with the groove 28 maintain the posture of the grounding rod 4, and as shown in FIG. 12, the grounding rod 4 is rotated by 90 ° in a plane about the axis of the leg 3. When this is done, the grounding rod 4 becomes the supporting rod 2
As shown in FIG. 2, the support base 1 has the grounding rods 4 and 4 on both sides grounded on the floor, and the legs 3 and 3 stand upright on the ground. At the upper ends of the bodies 3 and 3, the support rod 2 is in an upright state in which the support rod 2 is horizontally arranged, and a screen or the like can be placed on the support rod 2.

Further, in order to fold the support stand 1 in the standing state, the grounding rod 4 is rotated with respect to the leg body 3 so as to be parallel to the supporting rod 2 in a plane, contrary to the above-mentioned assembly. After that, it is folded so as to overlap the outer surface of the leg body 3, and then the lock member 7 is released from the fixation to the support rod 2 and is moved away from the first hinge mechanism 5 toward the central portion of the support rod 2. The body 3 is folded on the lower surface of the support rod 2 and then the lock member 7
Is grounded to the second hinge mechanism 6 so that the protrusion 35 is engaged with the concave groove 37 of the outer hinge piece 23, and the abutting portion 36 becomes the disc portion 2.
If the lock member 7 is fixed to the support rod 2 while being in contact with the outer periphery of the support rod 4, the folded state shown in FIG. 1 is obtained.

[0037]

As described above, according to the present invention, the legs mounted on the lower surface of the supporting rod at the positions of both ends by the first hinge mechanism are in a folded state overlapping the lower surface of the supporting rod and the supporting rod. Since the locking member holds the downward protruding state, the entire supporting stand becomes a single rod in the folded state, which makes it extremely low in volume, which is convenient for transportation and storage, and allows the standing and folding operations. Movement of the lock member,
Since only the rotation of the legs and the rotation of the grounding rod are operated, the standing and folding operations can be performed easily and efficiently.

Further, both ends of the supporting rod are supported by upright legs, and the grounding rod provided at the lower end of the legs is made to be orthogonal to the supporting rod in a plane to maintain the standing state. It has a good sense of stability when standing up, and there is no overhanging part to the front, so there is an effect that the viewer is not intimidated.

[Brief description of drawings]

FIG. 1A is a front view showing a folded state of a support base according to the present invention, and FIG. 1B is a bottom view of the same.

FIG. 2A is a front view showing a standing state of a support base according to the present invention, and FIG. 2B is a bottom view of the same.

FIG. 3A is a bottom view showing a folded state of the leg showing the first hinge mechanism and the attachment structure of the leg to the support rod according to the present invention, FIG. 3B is the same front view, and FIG. Same vertical section

FIG. 4 is a bottom view showing the mounting structure of the legs to the first hinge mechanism of the support base according to the present invention.

FIG. 5 is a front view showing a state in which a leg is pulled out, showing a mounting structure of a first hinge mechanism and a leg to a support rod of a support base according to the present invention.

6A is a vertical cross-sectional view taken along the line bb of FIG.
(B) is a vertical sectional view taken along the arrow cc in FIG.

FIG. 7 is an exploded perspective view showing a mounting structure of a leg and a lock member for the first hinge mechanism in the above.

FIG. 8 is an exploded perspective view showing another example of FIG.

FIG. 9A is a front view of a folded state showing a structure for attaching a grounding rod to a leg by a second hinge mechanism, and FIG.
Is the bottom view

FIG. 10 is an exploded perspective view showing a structure for attaching a grounding rod to a leg by a second hinge mechanism and a lock member.

FIG. 11A is a front view in a pulled-out state showing a structure for attaching a grounding rod to a leg by a second hinge mechanism;
(B) is a vertical sectional view taken along the line bb of (A).

FIG. 12 is a perspective view of the above.

[Explanation of symbols]

1 support 2 Support rod 3 legs 4 Grounding rod 5 First hinge mechanism 6 Second hinge mechanism 7 Lock member 8 grooves 9 End cap 10 volts 11 Base hinge 12 Hinge member 13 Connection bolt 14 Mounting block 15 Hinge pieces 16 Support wall 17 Fitting part 18 Hinge piece 19 Locking ridge 20 Upper hinge member 21 Lower hinge member 22 Connecting bolt 23 Hinge piece 24 disk part 25 hinge pieces 26 circular seat 27 volts 28 groove 29 ridges 30 ridges 31 Side wall 32 bottom wall 33 groove 34 groove 34 'groove 35 ridges 36 Contact part 37 groove 38 Volts

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kao Kawamura             4 shares at 545 Kita-Nagai Town, Nara City, Nara Prefecture             Company Kinki Education Center

Claims (3)

[Claims] 1. A horizontally-long support rod, and a first hinge mechanism at a position of both ends of a lower surface of the support rod, from a folded state overlapping along a lower surface length direction of the support rod to a lower portion of the support rod. From the state in which the leg body is attached so as to rotate between the protruding state and the second hinge mechanism at the lower end of the leg body along the longitudinal direction of the leg body, the leg body is perpendicular to the lower end of the leg body. And a grounding rod mounted so as to be rotatable about the shaft center of the leg at the lower end of the leg and a lower surface of the support rod in the longitudinal direction. The lock member is composed of two lock members that are attached so as to be freely movable. The lock member is detachable from the first hinge mechanism in which the legs protrude below the support rod, The engagement of the leg with the hinge mechanism keeps the legs protruding below the support rod and supports them. In a folded state in which the legs overlap with the lower surface of the holding rod, the legs can be engaged with and disengaged from the second hinge mechanism, and the legs are held in the folded state by engaging with the second hinge mechanism. Support for screens, etc. 2. The first hinge mechanism according to claim 1, wherein a hinge member fixed to an upper end of a base hinge leg fixed to the lower surface of the support rod is pivotally attached by an axis, and the leg is supported on both sides of the base hinge below the support rod. The lock member is formed by providing a support wall into which the leg fits when it is projected, and the lock member is moved along a groove provided in the length direction so as to open on the lower surface of the support rod and tightens the screw. The supporting rod can be freely fixed at any position, and the opposite side walls on both sides have a width to be fitted onto the base hinge, and the groove and the protrusion are formed on the fitting surface of the side wall and the base hinge. 2. A pair of engaging portions consisting of the above are provided, and the lock member is provided with an abutting portion for a leg that projects downward of the support rod in an engaged state with the base hinge. Support for screens, etc. 3. The upper hinge fixed to the lower end of the leg body so that the grounding rod can be arranged at a right angle at the lower end of the leg body from the state where the grounding rods are overlapped along the length direction of the leg body. And a lower hinge member attached to the lower surface of the grounding rod are pivotally attached by an axis, and the grounding rod is attached to the lower hinge member so as to be rotatable in a plane, and the above hinges are provided on both sides of the upper hinge member. The support base for a screen or the like according to claim 1 or 2, wherein one side of a pair of engaging portions formed of a groove and a ridge of the lock member is provided.