JP3838148B2 - Free-standing manual lifting screen - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, the upper end support member is lifted by hand, and the screen is extended upward, or the upper end support member is pushed downward to be rolled up and stored in the casing. It is related with the self-supporting manual raising / lowering screen comprised as follows.
[0002]
[Prior art]
Various types of self-supporting manual elevating screens have been proposed. For example, the screen is extended by pivotally connecting the upper end of a pantograph type link mechanism at the center of the screen in the lateral width direction of the upper end support member of the screen. It is made to hold.
However, in the case where the upper end of the link mechanism is pivotally connected only at the center of the screen in the horizontal direction of the upper end support member as described above, the smooth expansion and contraction of the link mechanism can be performed stably and the screen can be In order to be stable and independent, not only must the left and right balance be adjusted accurately, but the screen cannot be raised or lowered smoothly if the screen is not raised or lowered with the center of the upper end support member in the left-right direction. In some cases, the operability was lowered.
[0003]
[Problems to be solved by the invention]
As a solution to the above inconvenience, there is one disclosed in Japanese Patent No. 3243037, for example. This is because the left and right ends of the upper end support member and the left and right ends of the support frame are connected and supported by the left and right sides of the link mechanism composed of the upper end side arm and the support frame side arm, so that the link mechanism can be smoothly extended and contracted stably. And making it possible for the screen to stand on its own.
However, when the screen is pushed down by holding the left and right end portions of the upper end support member of the stretched screen, the side on which the upper end support member is pressed is in an inclined posture in which the screen is lowered first, and the screen cannot be lowered smoothly. Thus, the screen has to be raised and lowered with the upper-left support member approximately in the center in the left-right width direction, and it has been impossible to avoid a decrease in operability. Note that if the screen is lifted and lowered with a strong force by holding the left and right end portions of the upper end support member, the screen may be damaged. In practice, the screen is lifted and lowered with the substantially center in the left and right direction of the upper end support member. It is common.
[0004]
In view of the above-mentioned situation, the present invention intends to solve not only troubles such as damage to the screen, even if the screen is lifted and lowered with any part of the upper-left support member in the left-right width direction of the screen. The object is to provide a self-supporting manual lifting screen that can be raised and lowered quickly and smoothly.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the self-supporting manual lifting screen of the present invention is attached to a base member in a state where a winding member having one end connected to wind up the screen is wound and biased. In a state where the upper end support member having the end connected thereto and the base member are distributed to both the left and right sides with the link mechanism in which the upper side arm and the lower side arm are pivotally connected to each other across the center in the horizontal direction of the screen. The left and right link mechanisms are pivotally connected to each other, and the lower link arms provided on the left and right sides and the rotating members provided at the center of the base member in the horizontal direction of the screen in the horizontal direction are respectively linked via push / pull members. The two push-pull members are drawn toward the center of the screen in the width direction of the screen by expansion and contraction of at least one of the link mechanisms, and the screen It is characterized in that the freely configured switchable between a state of moving press to the left and right ends from.
Therefore, when the screen is pulled up (started up) to the use posture, or when the screen is lowered to the storage posture, the left and right link mechanisms expand and contract to support the screen smoothly and stably. In addition, for example, the screen left-right width direction right end side (or left end side) of the upper end support member of the screen in the extended state (use state) is pushed down, or the screen left-right width direction right end side (or left end) of the screen upper end support member in the storage state By pulling up the two push-pull members toward the center in the left-right width direction of the screen, or by switching to a state in which they are pushed and moved from approximately the center in the left-right width direction to the left and right ends, The left end side (or right end side) in the left-right width direction of the screen is pushed down, or the right end side (or left end side) in the left-right width direction of the upper end support member of the screen in the stored state is pulled up. In other words, no matter which part of the upper end support member is used to lift and lower the screen, the screen does not tilt up and down and the screen tilts, so that the center part of the upper end support member in the left-right width direction of the screen The screen can be raised and lowered smoothly and quickly, just as with the screen.
[0006]
The lower arm of each of the left and right lower arms is extended in a direction intersecting with the longitudinal direction of the lower arm by swinging a swing arm that swings around its pivotal support. The free end portion and the rotating member are interlocked and connected via a push / pull member.
As described above, by providing an extended portion from the pivotal support part to the connecting part of the push / pull member, the lower arm can be swung as compared with a structure in which the push / pull member is pivotally connected directly to the lower arm. The power to do can be reduced.
[0007]
The left and right lower arms are pivotally connected in a state where the upper ends of the left and right upper arms are shifted back and forth so as not to overlap the left and right ends of the upper end support member or the periphery thereof in the left-right direction. The lower end of the left and right lower ends of the base member are pivotally connected in a state where they are shifted back and forth so that they do not overlap with the left and right ends of the base member in the left and right direction, and the lower ends of the left and right upper arms and the left and right lower portions The left and right link mechanisms are constructed by pivotally connecting the upper ends of the side arms on the same side via a reinforcing connecting member that can be externally fitted, and the upper and lower arms are pivoted. The two connecting members to be connected to each other are positioned at the substantially central portion in the left-right direction by switching from the shortened storage state to the maximum extended state of the left and right link mechanisms respectively positioned at both ends in the left-right direction and the two connections Wood has set up extended state of the link mechanism so as not to overlap with the front-rear direction.
By setting the maximum extension state of the link mechanism so that the two connecting members do not overlap in the front-rear direction as described above, the upper side arms and the lower side arms arranged on the left and right sides are made as close as possible in the front-rear direction. It can be arranged in the state. In addition, the degree of extension (the rotation of the upper and lower arms is different from that of the link mechanism configured such that the two connecting members do not overlap in the front-rear direction, that is, the two connecting members intersect in the front-rear direction or are separated after crossing. Range) can be reduced. In addition, the upper ends of the left and right upper arms are pivotally connected to the left and right ends of the upper end support member or the periphery thereof, so that the screen can be raised and lowered while maintaining the left and right balance stably. A large stroke in the direction can be taken.
[0008]
By providing an urging means for urging the lower arm to move upward, when the upper end support member is pushed down to switch the expanded screen to the retracted state, the upper end support member is slowly Can be lowered and the screen can be held at any vertical position.
[0009]
The upper end support member is lifted by providing an urging means for pulling and urging the two push-pull members toward the substantially central side in the left-right width direction of the screen while acting on the rotational urging force in one direction of the rotating member. Part of the lifting force at the time can be exhibited by the biasing means.
[0010]
The biasing means is constituted by a pair of coil springs provided so as to act on a rotational biasing force in one direction of the rotating member in order to pull the two push-pull members in the horizontal direction of the screen. The left and right balances can be more easily balanced as compared with the one constituted by one coil spring.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
1, 2 (a), 2 (b), and FIG. 3, a portable, lightweight and small-sized (handy type) self-supporting type containing a screen (size (size) may be other than that shown in the figure) 1 A storage lifting screen (hereinafter referred to as a lifting screen) 2 is shown. In the following, the longitudinal direction (screen horizontal width direction) of the lifting screen 2 shown in FIG. 2A is the left-right direction, and the direction orthogonal to the longitudinal direction of the lifting screen 2 (screen horizontal width direction) is the front-back direction. explain. The elevating screen 2 includes a casing 3 for winding and storing the screen 1 and an upper end support member 4 disposed on the back (rear) side of the screen 1 and connected to the upper end of the screen 1. Left and right link mechanisms 5, 5 (see FIG. 5) having upper ends pivotally connected to both left and right ends are provided. 1 is a cover member that can be freely opened and closed to close the upper opening 3K of the casing 3, and 7 shown in FIGS. 1 and 2A is used when carrying the lifting screen 2. A pair of front and rear handles, which are attached to support members 8 and 8 screwed to the casing 3 so as to be swingable around a horizontal axis, and in a retracted posture indicated by a solid line and a two-dot chain line positioned above the casing 3 Although it is configured to be swingable to the use posture shown, it may be omitted. The elevating screen 2 is not limited to the configuration shown in the figure, and the shape, size, and the like can be freely changed.
[0012]
As shown in FIGS. 1 and 2 (a) and 2 (b), the casing 3 includes a cylindrical case body 3A having a substantially U-shaped cross-section in which the above-described upper opening 3K is formed. The end caps 3B and 3B for closing the openings at the left and right ends of the case main body 3A, and the substantially rectangular legs in a plan view, which are rotatably attached to two specific left and right positions of the lower surface of the case main body 3A. The leg portions 3C and 3C are configured to be switchable between a retracted (non-use) posture in which the longitudinal direction thereof extends along the longitudinal direction of the casing 3 and a use posture orthogonal to the longitudinal direction of the casing 3. However, the legs 3C and 3C may be configured to be detachable, may be fixed in a use posture, or may be lifted and lowered on the bottom surface of the casing 3 stably. Can support Lever can be implemented by omitting the leg 3C, 3C.
[0013]
As shown in FIG. 1, the bottom portion of the case main body 3A is provided with a horizontal plate portion 3D positioned slightly above, and the horizontal plate portion 3D is used for fixing the link mechanisms 5, 5 and the like. Although the structure is shared with the base member, another base member may be attached to the case main body 3A.
[0014]
The screen 1 is wound around a cylindrical winding pipe 9 as a winding member supported in the casing 3, and the winding pipe 9 is urged by a biasing means such as a spring (not shown). Winding biasing (rotation biasing in one direction) is performed. Then, the locking piece 10 attached to the upper end of the screen 1 is locked to the upper end supporting member 4 having a horizontal dimension substantially the same as the horizontal width of the screen 1 so that the upper end of the screen 1 is connected to the upper end supporting member. 4 may be connected by other methods. A handle 4 </ b> A for lifting the screen 1 is screwed to a substantially central portion in the left-right direction of the upper end support member 4, but may be omitted.
[0015]
Referring to the link mechanisms 5 and 5, as shown in FIG. 4 and FIG. The upper ends of the upper arms 11, 11 made of a square tube (may be cylindrical, etc.) and made of metal (other materials may be used as long as they have substantially the same strength as metal) are connected via the bracket 12. Left and right square cylinders (cylindrical shapes) are respectively connected to the support plates 14 and 14 that are pivotally connected and fixed to both left and right ends of the base member 3D (if they are in the vicinity, they may be slightly central portions from both ends). Etc.) and lower ends of the lower arms 13 and 13 made of metal (may be made of other materials as long as they have substantially the same strength as metal) are pivotally connected to the upper left and right sides. The lower ends of the arms 11 and 11 and the lower left and right sides Constitute a retractable left and right link mechanisms 5, 5 by each pivotally connected to the upper end of the over arm 13 at the same side to each other. As described above, the upper ends of the upper arms 11, 11 are pivotally connected to positions close to the left and right ends of the upper end support member 4, so that the screen 1 can be raised and lowered more stably. Although there is an advantage that a large stroke in the vertical direction can be obtained, the upper ends of the upper arms 11 and 11 may be pivotally connected to a position close to the center in the horizontal direction in some cases.
[0016]
More specifically, the upper ends of the left and right upper arms 11, 11 overlap the left and right end portions of the upper end support member 4 in the left-right direction. The lower ends of the left and right lower arms 13, 13 are connected to the left and right ends of the base member 3D (if they are in the vicinity, they are slightly centered from both ends. The lower end of the left and right upper arms 11 and 11 and the lower arms 13 and 13 of the left and right. The left and right link mechanisms 5, 5 are configured to be extendable by being pivotally connected on the same side via reinforcing connecting members 15, 15 that can be externally fitted to the upper ends. Side arm 13, 13 As shown in FIG. 5, the two connecting members 15 and 15 that are connected to each other are switched from the shortened storage state to the maximum extension state of the left and right link mechanisms 5 and 5 that are respectively located at both ends in the left and right direction. In addition, the maximum extension state of the link mechanisms 5 and 5 is set (restricted) so that the two connecting members 15 and 15 do not overlap in the front-rear direction. Therefore, not only can the left and right link mechanisms 5 and 5 be moved closer to each other in the front-rear direction, but also the expansion and contraction range of the link mechanisms 5 and 5 is suppressed to be advantageous in terms of durability. In the shortened state of the left and right link mechanisms 5, 5, the connecting member 15, which is a pivot connecting portion of the upper arm 11 at the left end portion and the lower arm 13 at the left end portion, is disposed at the right end portion and the upper portion of the right end portion. By setting the lengths of the arms 11, 11, 13, and 13 so that the connecting member 15, which is a pivot connecting portion between the side arm 11 and the lower side arm 13 at the right end portion, is arranged at the left end portion, the link mechanism 5 5 is not only protruding in the left-right direction from the screen 2 during the expansion / contraction operation, but also has the advantage that the movement stroke in the vertical direction of the screen 2 can be increased, but the length of the arms 11, 11, 13, 13 Although the casing 3 becomes longer in the longitudinal direction, the connecting members 15 and 15 can be arranged so as to protrude from the left and right sides of the screen 2.
Each of the connecting members 15 includes a rectangular upper fitting member 15A that is fitted and fixed to the lower end of the upper arm 11, and a rectangular lower fitting member 15B that is fitted and fixed to the upper end of the lower arm 13. The upper fitting member 15A and the lower fitting member 15B are rotatably connected to the pin body 15C, but may have other configurations.
[0017]
As shown in FIGS. 4 and 5, gas springs 16, 16 as urging means for urging and moving the lower arms 13, 13 upward (may have other configurations) The screen 1 is mounted between the brackets 17 and 17 which are fixed at substantially the central position in the longitudinal direction of the lower arms 13 and 13 and the position closer to the central side in the left and right direction than the support plates 14 and 14 of the base member 3D. The lowering can be performed slowly, and the screen 1 can be held at an arbitrary height position. Actually, the urging force of the gas springs 16, 16, the frictional resistance at the pivot connecting portion of the connecting members 15, 15, the weight of the screen 1 etc. applied to the lower arms 13, 13, the winding of the screen 1 By balancing all the urging forces and the like, the screen 1 can be held at an arbitrary height position.
[0018]
As shown in FIGS. 5 to 7, a swinging arm portion 18 that swings around the pivotal support portion at the lower end of each of the left and right lower arms 13 and 13 is substantially perpendicular to the longitudinal direction of the lower arm 13. (A direction that is substantially orthogonal is preferable, but any direction that intersects may be used.) The free end portions of the two swing arm portions 18 and 18 and the base member 3D Through a push rod 20A, 20B serving as a push member, a plate-like member provided rotatably around a vertical (vertical) axis X provided in the center in the left-right direction and having a substantially oval rotating member 19 in plan view. The two push rods 20A, 20B are switched to a state where the two push-pull rods 20A, 20B are drawn to substantially the center in the left-right direction and to a state where they are pushed and moved from substantially the center in the left-right direction to the left and right ends. Self It is configured to. Therefore, for example, when the left end of the upper end support member 4 is pushed down in FIG. 5, the swing arm 18 shown by the solid line in FIG. 6 is swung in the direction shown by the two-dot chain line, and the push rod 20A is pulled and rotated. The member 19 rotates from the position shown by the solid line in FIG. 7 to the position shown by the two-dot chain line, the other push rod 20B is pushed in, the right link mechanism 5 is shortened, It can be lowered smoothly. Also, when the right link mechanism 5 is shortened by pushing down the right end of the upper end support member 4, the left link mechanism 5 is passed through the push / pull rod 20B, the rotary member 19, and the push / pull rod 20A as described above. Can be shortened. Although the rotating member 19 is provided to be rotatable about the vertical (upper and lower) axis X, the rotating member 19 may be provided to be rotatable about the horizontal axis. By providing swinging arm portions 18 and 18 at the lower ends of the lower arms 13 and 13, the pivot connecting portions 20S and 20S of the push rods 20A and 20B are supported from the pivot portions 13S and 13S of the lower arms 13 and 13, respectively. Can reduce the force for swinging the lower arms 13 and 13 by a distance of up to 5 mm, and can transmit power from one link mechanism 5 to the other link mechanism 5 smoothly and lightly. There is an advantage that the urging force of coil springs 21 and 21 described later can be reduced.
Further, the left and right coil springs 21 and 21 as urging means for urging and urging the two push-pull rods 20A and 20B substantially in the left-right direction are used as rotational urging forces in one direction of the rotating member 19. It is provided in a working state. That is, the coil springs 21 and 21 are provided between the upper ends of the central ends of the push-pull rods 20A and 20B and the brackets 17 and 17 to urge the rotary member 19 to rotate clockwise in FIG. In this way, the urging force of the coil springs 21 and 21 can be used as a part of the pulling force when the screen 1 in the stowed position is raised, but it can also be omitted. By providing the two coil springs 21 and 21 as described above, there is an advantage that the pulling force to the left and right push-pull rods 20A and 20B can be made substantially equal to the left and right. Alternatively, three or more can be provided. Although the coil springs 21 and 21 are disposed above the push / pull rods 20A and 20B, the coil springs 21 and 21 and the push / pull rods 20A and 20B may be disposed separately in the front-rear direction.
[0019]
When raising and lowering the elevating screen 2, the elevating screen 2 is first moved to a predetermined position, and then the legs 3C and 3C are orthogonal to the longitudinal direction of the casing 3 as shown in FIGS. Switch to the usage posture. From this state, the upper opening 3K is opened by moving the cover member 6 shown in FIG. 1 in the direction of the arrow. Next, by lifting the handle 4A to a predetermined height, the handle 4A can be extended as shown in FIG. The screen 1 may be lifted and extended by holding the upper end support member 4 other than the handle 4A. In this case, since the link mechanisms 5 and 5 are connected by the push / pull rods 20A and 20B as described above, even when one end of the left and right direction is lifted, the other end can be lifted simultaneously, and the handle 4A is lifted. Similarly, the screen 1 can be lifted smoothly.
When the expanded elevating screen 2 is put into a storage state, the screen 1 is wound and stored in the casing 3 by holding down the upper end support member 4 other than the handle 4A or the handle 4A, and then covering the cover. The member 6 is closed. When moving the lifting screen 2 to another location, the legs 3C, 3C are switched in the longitudinal direction of the casing 3 to prevent the legs 3C, 3C from contacting other objects during the movement. can do.
[0020]
【The invention's effect】
According to the first aspect of the present invention, the left and right link mechanisms are interlocked and connected via the push / pull member, so that even if the screen is lifted and lowered by holding the left and right portions of the upper end support member, It is possible to provide a self-supporting manual lifting screen that is not only trouble-free, but can be raised and lowered quickly and smoothly, and is advantageous in both operability and durability.
[0021]
According to the second aspect of the present invention, the swinging arm portion swinging around the pivotal support portion is extended at the lower end of each of the left and right lower side arms in a direction intersecting the longitudinal direction of the lower side arm. By connecting the free end portions of the two swinging arm portions and the rotating member via the push / pull members, respectively, the lower arm is extended only by the extended distance from the pivot portion to the push / pull member connection portion. Compared to the direct pivot connection of the push / pull member, the force to swing the lower arm can be reduced, and the transmission of power from one to the other of the left and right link mechanisms can be performed smoothly and lightly. Can do.
[0022]
According to the invention of claim 3, by setting the maximum extension state of the link mechanism so that the two connecting members do not overlap in the front-rear direction, the upper-side arms and the lower-side arms arranged on the left and right are moved in the front-rear direction. Therefore, it is possible to reduce the size by reducing the longitudinal dimension of the casing. In addition, the degree of extension (the rotation of the upper and lower arms is different from that of the link mechanism configured such that the two connecting members do not overlap in the front-rear direction, that is, the two connecting members intersect in the front-rear direction or are separated after crossing. Range) can be reduced, which is advantageous in terms of durability. Further, the upper ends of the left and right upper arms are pivotally connected to the left and right end portions of the upper end support member or the periphery thereof, thereby improving the stability of raising and lowering the screen while maintaining a stable left and right balance. In addition, there is an advantage that the height of the screen can be easily changed by taking a large stroke in the vertical direction of the screen.
[0023]
According to the invention of claim 4, the upper end support member is pushed down to switch the expanded screen to the retracted state by providing the biasing means for moving and biasing the lower arm upward. In this case, the upper end support member can be lowered slowly, which is advantageous in terms of both safety and impact durability, and can be convenient to hold the screen in any vertical position. it can.
[0024]
According to the fifth aspect of the present invention, the urging means for pulling and urging the two push-pull members substantially in the center in the left-right width direction of the screen is provided in a state of acting on the rotational urging force in one direction of the rotating member. Thus, a part of the lifting force when lifting the upper end support member can be exerted by the urging means, and the operability that can lift the screen lightly can be improved.
[0025]
According to the invention of claim 6, the biasing means includes a pair of coil springs provided so as to act on a rotational biasing force in one direction of the rotating member in order to pull the two pushing members in the horizontal direction of the screen. By comprising, compared with what comprises a single coil spring, it becomes easier to balance left and right, and the screen 2 can be raised and lowered more smoothly.
[Brief description of the drawings]
FIG. 1 is a vertical side view of a lifting screen.
FIGS. 2A and 2B show a lifting screen, in which FIG. 2A is a front view, and FIG. 2B is a longitudinal front view;
FIG. 3 is a front view of the lifting screen in a state where the screen is in a use posture.
FIG. 4 is a partially cutaway side view of the screen in a use posture.
FIG. 5 is a rear view in partial cross section of the lift screen in a state where the screen is in a use posture.
FIG. 6 is a longitudinal sectional view showing a structure inside the casing.
FIG. 7 is a cross-sectional plan view showing a structure in the casing.
[Explanation of symbols]
1 screen 2 lifting screen
3 Casing 3A Case body
3B end cap 3C leg
3D horizontal plate (base member)
3K upper opening 4 upper end support member
4A Handle 5 Link mechanism
6 Cover member 7 Handle
8 Support member 9 Winding pipe
10 Locking piece 11 Upper arm
12 Bracket 13 Lower arm
14 Support plate 15 Connecting member
15C Pin body 15B Lower fitting member
15A Upper fitting member 13S Pivot
16 Gas spring (biasing means)
17 Bracket 18 Swing arm
19 Rotating member 20S Pivot connection part
20A, 20B Push-pull member (push-pull rod)
21 Coil spring
X axis core

Claims (6)

A winding member having one end connected to the base member to wind the screen is attached in a state of being wound and biased, and an upper end support member to which the other end of the screen is connected and the base member are connected to the upper arm. And a lower arm are pivotally connected in a state of being distributed to the left and right sides across the center in the horizontal direction of the screen by a link mechanism in which the lower arm and the lower arm are pivotally connected. A rotating member provided approximately at the center in the left-right width direction of the screen of the base member is interlocked and connected via a push-pull member, and the two push-pull members are moved by expansion and contraction of at least one of the left and right link mechanisms. The screen can be switched between a state where it is drawn almost to the center in the left-right width direction and a state where it is pushed and moved from approximately the center in the left-right width direction to the left and right ends. Self-supporting manual lifting screen, wherein the door. The lower arm of each of the left and right lower arms is extended in a direction intersecting with the longitudinal direction of the lower arm by swinging a swing arm that swings around its pivotal support. The self-supporting manual lifting screen according to claim 1, wherein the free end portion and the rotating member are interlockedly connected to each other via a push-pull member. The left and right lower arms are pivotally connected in a state where the upper ends of the left and right upper arms are shifted back and forth so as not to overlap the left and right ends of the upper end support member or the periphery thereof in the left-right direction. The lower end of the left and right lower ends of the base member are pivotally connected in a state where they are shifted back and forth so that they do not overlap with the left and right ends of the base member in the left and right direction, and the lower ends of the left and right upper arms and the left and right lower portions The left and right link mechanisms are constructed by pivotally connecting the upper ends of the side arms on the same side via a reinforcing connecting member that can be externally fitted, and the upper and lower arms are pivoted. The two connecting members to be connected to each other are positioned at the substantially central portion in the left-right direction by switching from the shortened storage state to the maximum extended state of the left and right link mechanisms respectively positioned at both ends in the left-right direction and the two connections Freestanding manual lifting screen according to claim 1, wherein the wood is to set the maximum extended state of the link mechanism so as not to overlap with the front-rear direction. The self-supporting manual elevating screen according to any one of claims 1 to 3, further comprising urging means for urging and moving the lower arm upward. The urging means for pulling and urging the two pushing / pulling members toward the substantially central side in the left-right width direction of the screen is provided in a state of acting on the rotational urging force in one direction of the rotating member. The self-supporting manual lifting screen described in any one of the above. The said urging | biasing means consists of a pair of coil spring provided in the state which acts on the rotational urging | biasing force to the one direction of the said rotation member in order to pull the said 2 pushing / pulling members in the screen left-right width direction. Free-standing manual lifting screen.

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