JP5765795B2 - Worktable device and laminated structure of worktable devices - Google Patents

Description

  The present invention relates to a workbench device capable of height adjustment.

  2. Description of the Related Art Conventionally, stepladders, stepladders, ladders (hereinafter referred to as “stepladders”, etc.) used for work in high places are generally provided with a fixed step for an operator to move up and down.

  When the worker moves vertically and vertically, the worker raises and lowers the steps one step at a time. When ascending and descending the step, the operator ascends and descends with care not to step off the step. In addition, while the operator is on the step, he / she stretches his / her limbs and spine, bends his back, and works within the reach of his / her hand.

  On the other hand, when moving in the horizontal direction using a stepladder or the like, since the range of the step is narrow, the horizontal movement cannot be performed on the step. In this case, each time the operator descends to the ground and moves the stepladder etc. to the side, it is troublesome because the step is again raised.

  As an exception, in the case of a trapezoidal stepladder having a horizontally long base on the top as shown in FIG.

  However, the conventional structure shown in FIG. 1 has a problem that since the height of the table cannot be changed, the working range in the height direction can be worked only within a range that reaches from a fixed height.

  In order to be able to work in both vertical and horizontal directions at a high place, a method of lifting a gondola on which an operator is placed with an arm or a wire, or a method of forming a temporary scaffold by assembling pipes in a cross-beam shape, etc. .

  In order to lift the gondola with an arm or the like, large equipment such as heavy machinery is necessary, and in the present situation, assembling the scaffolding is a large-scale work. In any case, it would be quite expensive to do the work. In addition, heavy machinery has many restrictions on the installation location.

  In addition, at present, as shown in FIG. 2, a base or box with wheels at the bottom is supported from below by an X-shaped link frame that opens and closes through the center of X, and the base is opened and closed by opening and closing the X-shaped link frame. Alternatively, there is a vertical lift type aerial work vehicle in which a box moves up and down. Although there are cases where there are no wheels at the bottom, there is also a lifting work table having a similar structure using an X-shaped link frame for the lifting method of the base.

  When viewed from the front, these are structures in which single X-shaped link frames having X-shaped links arranged on the front and back are stacked vertically. Therefore, the load is only distributed to the single X-shaped links on the front and back sides, and it is necessary to use a high-strength member as a constituent member of the X-shaped link frame. .

  Moreover, since the single X-shaped link frames are stacked vertically, the X-shaped link frame to be supported becomes a rod-like shape when the height of the base or the box is increased, resulting in an unstable structure. In order to avoid this, it is necessary to increase the vertical height by slightly opening and closing the X-shaped link frame so that the X-shaped link frame does not close too much.

  For this reason, the length of each member of the X-shaped link frame must be shortened so that a large number of stages are stacked, which is also a factor that makes the equipment heavy (for example, (See Patent Document 1).

  Furthermore, at present, as shown in FIG. 3, there is a method in which the table is moved up and down by moving the table along the support column. This device is easy to handle, but has a problem that the scaffolding is narrow and the ladder and support are not fixed firmly, the danger is high, and the range of movement is narrow due to the narrow width. For this reason, at present, it is often used as a means for moving an object up and down rather than a person.

JP 2008-162365 A

  In view of the circumstances as described above, the present invention does not work on a narrow step like a conventional stepladder in a vertical and horizontal work at a high place, but a fixed width and length. It is possible to work on a platform with stable support, and the operator himself does not go up and down by stepping on the step, but the operator raises and lowers the work table. It is an object of the present invention to provide a work table apparatus that can be operated while being mounted on it, and that is simple in structure and easy to handle.

  In order to achieve the above object, a workbench device according to the present invention is a workbench device that can be adjusted in height, a workbench on which a person or an object is placed, an upper frame that supports the workbench, A lower frame disposed below the upper frame; a first X-shaped link frame and a second X-shaped link frame that connect the upper frame and the lower frame; The X-shaped link frame and the second X-shaped link frame are configured to cross each other.

  Thus, the workbench device of the present invention is a workbench device that can be adjusted in height, including a workbench on which a person or an object is placed, an upper frame that supports the workbench, and a lower part of the upper frame. A first X-shaped link frame and a second X-shaped link frame, and a first X-shaped link frame and a second X-shaped link frame that connect the lower frame to the upper frame and the lower frame. The X-shaped link frame is configured to be able to cross each other.

  With such a configuration, the height of the work table can be adjusted in accordance with the work, and the work table having the width and length necessary for the work can be stably supported. Furthermore, since the length of the X diameter of the intersecting X-shaped link frame can be increased to the length of the table, a large difference in height can be obtained.

It is a conventional stepladder. This is a conventional mobile work table. (A) is a state where the X-shaped link frame is folded, and (b) is a state where the X-shaped link frame is extended. It is a conventional lifter. It is explanatory drawing of a single unstable X-shaped link frame. (A) is in a state of being close to the center, and (b) is in a state of being close to one side. It is explanatory drawing explaining the whole structure of the worktable apparatus of Example 1. FIG. (A) is an exploded perspective view, (b) is a state where the X-shaped link frame is closed, and (c) is a state where the X-shaped link frame is opened. It is explanatory drawing of the front view explaining the structure of the work bench | platform apparatus of a comparative example. (A) is a state where the X-shaped link frame is opened, and (b) is a state where the X-shaped link frame is closed. It is explanatory drawing of the top view explaining the method of changing the width | variety of two X-shaped link frames and making an X-shaped link frame cross | intersect. (A) is a state where the X-shaped link frame is closed, and (b) is a state where the X-shaped link frame is opened. It is explanatory drawing of the top view explaining the method of shifting two X-shaped link frames back and forth, and making an X-shaped link frame cross | intersect. (A) is a state where the X-shaped link frame is closed, and (b) is a state where the X-shaped link frame is opened. It is explanatory drawing explaining the various forms of a X-shaped link frame. It is explanatory drawing of the front view explaining the structure of the work bench | platform apparatus of a comparative example. (A) is a case where the left and right X-shaped link frames are connected to separate frames, and (b) is a fulcrum that can rotate with the frames of the left and right X-shaped link frames, one on the outside and the other on the inside. (C) is the case where both the left and right X-shaped link frames and the rotatable fulcrum of the frame are inside, (d) is the left and right X-shaped link frame is the center point of the frame It is a case where it can be closed beyond. It is explanatory drawing of the front view explaining the structure of the worktable apparatus of Example 1. FIG. It is explanatory drawing explaining the structure of a flame | frame. (A) is a whole perspective view, (b) is a partial sectional view. It is explanatory drawing explaining the structure of a height adjustment mechanism. (A) is a whole perspective view, (b) is a schematic diagram schematically showing the structure. It is the laminated structure of the worktable apparatus comprised by overlapping the worktable apparatus of Example 2. FIG. 2 is an elevator according to a second embodiment. (A) is a state where the X-shaped link frame is opened and lowered, and (b) is a state where the X-shaped link frame is closed and raised. It is explanatory drawing explaining the structure of the worktable apparatus of Example 2. FIG. (A) is a front view, (b) and (c) are sectional views in the case where the frame is in the same plane. It is explanatory drawing of the top view explaining the method of changing through the width | variety of two X-shaped link frames, and passing through. (A) is a state where the X-shaped link frame is closed, and (b) is a state where the X-shaped link frame is opened. It is explanatory drawing of the top view explaining the method of shifting two X-shaped link frames back and forth, and passing through. (A) is a state where the X-shaped link frame is closed, and (b) is a state where the X-shaped link frame is opened. It is explanatory drawing of the temporary scaffold of Example 3. FIG. (A) is a front view before installation, (b) is a front view after completion of installation, and (c) is a side view after completion of installation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the overall configuration of the workbench apparatus 1 of the present embodiment will be described with reference to FIGS. 5 (a), 5 (b), and 5 (c). Hereinafter, in the drawings of the specification, a black circle is a rotatable fulcrum (for example, a hinge), and a white circle is a slidable fulcrum (for example, a wheel that moves along a rail).

  The workbench device 1 of the present embodiment is a workbench device 1 that can be adjusted in height. The work table 2, the upper frame 3 that supports the work table 2, the lower frame 4 disposed below the upper frame 3, and the first X-shape that connects the upper frame 3 and the lower frame 4. A link frame 5 and a second X-shaped link frame 6.

  Here, the “X-shaped link frame” in the present embodiment is configured by connecting two X-shaped links to each other after arranging two X-shaped links so as to overlap the front side and the back side. When the rotation axis position is connected by a shaft or the like, the frame structure may be a frame structure in which the corresponding X end positions are connected or a frame structure that is not connected, but the rotation axis position is not connected by a shaft or the like. In some cases, it is defined as a frame structure in which at least two corresponding X end positions are connected by a shaft or the like (see FIG. 9 described later). Therefore, it includes not only a perfect frame structure of a Japanese character shape that surrounds the periphery, but also includes an H-shaped shape, a rectangular shape, and a U-shaped shape. Furthermore, each X-shaped link means that two rod-shaped link members of equal length are overlapped at the center of the length, and the rotation shaft is inserted through the overlapped center so that it can rotate around the rotation axis. It is defined to mean the configuration.

  The work table 2 is a table for placing a person or an object. The work table 2 is placed on the upper surface of the upper frame 3 and fixed to the upper frame 3. Although not shown in the figure, a fence or a handrail can be arranged around the person so that people and objects do not fall. In that case, an entrance door can be provided.

  The upper frame 3 is configured by assembling a metal frame member having a U-shaped cross section into a rectangular shape. The upper four fulcrums 52, 52, 62, 62 arranged inside the X-shaped link frames 5, 6 are fitted into the long side of the U-shaped frame member, and slide along the frame member. It can be done. Further, four fulcrum points 51, 51, 61, 61 outside the X-shaped link frames 5, 6 are rotatably supported at the end portions of the long sides.

  Similarly, the lower frame 4 is configured by assembling a metal frame member having a U-shaped cross section into a rectangle. On the long side of the U-shaped frame member, four lower fulcrums 54, 54, 64, 64 arranged inside the X-shaped link frames 5, 6 are fitted, and along the frame member It can be slid. Further, four fulcrum points 53, 53, 63, 63 outside the X-shaped link frames 5, 6 are rotatably supported at the ends of the long sides.

  The upper frame 3 and the lower frame 4 are connected by the first X-shaped link frame 5 and the second X-shaped link frame 6.

  The first X-shaped link frame 5 has two X-shaped links 50 and 50 arranged on the front side and the back side, and is connected by a shaft connecting the central shaft 57 and the tip of the X to each other to form a complete frame. Configured as Each X-shaped link 50 is configured by intersecting two link members 55 and 56 in an X-shape and inserting a rotation shaft at the intersection. Therefore, the link members 55 and 56 rotate with respect to each other about the intersection. The link members 55 and 56 are closed, that is, the height in the vertical direction is high when the width in the horizontal direction is narrow, and the height in the vertical direction when the link members 55 and 56 are open, that is, when the width in the horizontal direction is wide. Becomes lower.

  A fulcrum 51 at the upper end of one link member 55 is rotatably attached to the end of the long side of the upper frame 3, and a fulcrum 54 at the lower end is attached to the lower frame 4 so as to be movable. Further, the upper end fulcrum 52 of the other link member 56 is attached to the upper frame 3 so as to be movable, and the lower end fulcrum 53 is attached to the end of the long side of the lower frame 4 so as to be rotatable. Thus, the fulcrum 51, 53 is attached to the end of the long side, so that the difference in vertical movement can be maximized according to the length of the table. Further, the first X-shaped link frame 5 has a longer center axis 57 and a longer depth (width) than the second X-shaped link frame 6 described later. . As a result, the X-shaped link frames cross each other.

  Similarly, the second X-shaped link frame 6 has two X-shaped links 60 and 60 arranged on the front side and the rear side, and is connected by a shaft connecting the central shaft 67 and the X tips. It is configured as a simple frame. Each X-shaped link 60 is configured by intersecting two link members 65 and 66 in an X-shape and inserting a rotation shaft at the intersection. Therefore, the link members 65 and 66 rotate with respect to each other about the intersection. The link members 65 and 66 are closed, that is, the height in the vertical direction is high when the width in the horizontal direction is narrowed, and the height in the vertical direction is set in the open state, that is, the width in the horizontal direction is wide. Becomes lower.

  And the fulcrum 61 of the upper end of one link member 65 is attached to the edge part of the long side of the upper frame 3 so that rotation is possible, and the fulcrum 64 of a lower end is attached to the lower frame 4 so that a movement is possible. Further, a fulcrum 62 at the upper end of the other link member 66 is attached to the upper frame 3 so as to be movable, and a fulcrum 63 at the lower end is attached to the end of the long side of the lower frame 4 so as to be rotatable. Thus, the fulcrum 61, 63 is attached to the end portion of the long side, so that the difference in vertical movement can be maximized according to the length of the table. Further, the second X-shaped link frame 6 has a shorter central axis 67 and a shorter length (width) in the depth direction than the first X-shaped link frame 5 described above. . As a result, the X-shaped link frames cross each other.

  Thus, each of the first X-shaped link frame 5 and the second X-shaped link frame 6 has four upper and lower fulcrums 51, 51, 53, 53 (61, 61, 63, 63) are rotatably attached to the end of the long side of the upper frame 3 and the end of the long side of the lower frame 4, respectively. Further, four upper and lower fulcrums 52, 52, 54, 54 (62, 62, 64, 64) arranged on the inner side are slidably attached along the upper frame 3 and the lower frame 4, respectively.

  Further, the X-shaped link frames 5 and 6 are configured so that the X-shaped links 50 and 60 on the front side and the X-shaped links 50 and 60 on the back side are a first central axis 57, a second central axis 67, and They are connected to each other by an axis connecting corresponding tips of X. For this reason, since the X-shaped link frames 5 and 6 become a complete frame as a whole, the rigidity is particularly increased. The X-shaped link frames 5 and 6 may be any of a Japanese character shape, a rectangular shape, a U-shaped frame structure, or an H-shaped frame structure. The rigidity of the link frames 5 and 6 can be increased.

  The upper and lower four fulcrums 52, 52, 54, 54 on the inner side of the first X-shaped link frame 5 are higher than the upper and lower four fulcrums 62, 62, 64, 64 on the inner side of the second X-shaped link frame 6. The second X-shaped link frame 6 is slidable on the side close to the fulcrum 61, 61, 63, 63 on the outside. On the other hand, the upper and lower four fulcrums 62, 62, 64 and 64 inside the second X-shaped link frame 6 are the four upper and lower fulcrums 52, 52, 54 and 54 inside the first X-shaped link frame 5. In addition, the first X-shaped link frame 5 is slidable closer to the fulcrum 51, 51, 53, 53 outside the first X-shaped link frame 5.

  With these configurations, the first X-shaped link frame 5 and the second X-shaped link frame 6 intersect each other. Specifically, the link member 55 of the first X-shaped link frame 5 intersects outside in the width direction of the link member 65 of the second X-shaped link frame 6, and the first X-shaped link. The link member 56 of the frame 5 intersects outside in the width direction of the link member 66 of the second X-shaped link frame 6. That is, the narrow second X-shaped link frame 6 opens and closes in the internal space of the wide first X-shaped link frame 5.

  As described above, since the support range of the entire table is not narrowed by crossing the two left and right X-shaped link frames 5 and 6, the X-shaped link frames 5 and 6 are unstable with the closed state. Can be prevented. In other words, as shown in FIG. 4, in the case of only a single X-shaped link frame arranged so that a pair of X-shaped links overlap each other on the front and back surfaces, the X-shaped link frame is closed. Becomes thinner. If it does so, the stability of the whole which supports a stand will be impaired.

  On the other hand, when the work table apparatus 1 of the present embodiment is used, the table is always supported at four points including the left and right ends of the upper and lower frames even when the X-shaped link frames 5 and 6 are closed. Since the center of gravity of the table is always in the center, the stability of the work table apparatus 1 can be increased.

(How to cross X-shaped link frames)
Next, a method of crossing the left and right X-shaped link frames 5 and 6 without interfering when the X-shaped link frames 5 and 6 open and close will be described.

  Generally, when two X-shaped link frames 5 and 6 of the same size on the left and right are arranged close to each other and the X-shaped link frames 5 and 6 are opened and closed, naturally, they immediately interfere with each other and cannot move. . To prevent simple interference, the X-shaped link frames 5 and 6 may be separated considerably as shown in FIGS. 6 (a) and 6 (b). In comparison, it is necessary to considerably increase the length of the work table and the frame.

  There are several methods for crossing a certain width without causing the adjacent X-shaped link frames 5 and 6 to interfere with each other. In this embodiment, (1) each of the X-shaped link frames 5 and 6 forms a sturdy frame. (2) The height difference due to opening and closing of the X-shaped link frames 5 and 6 can be taken to some extent, (3) the left and right X-shaped link frames 5 and 6 can be synchronized, and (4) the same structure As a structure having the advantage of being able to be stacked, a structure as shown in FIGS. 7A and 7B in a top view is employed. (A) is when X is closed, and (b) is when X is open.

  That is, whether the width (depth) of the left and right X-shaped link frames 5 and 6 is changed so that one is an outer frame and the other is an inner frame so that the inner frame can be placed inside the outer frame in the depth direction. As shown in FIGS. 8A and 8B in a top view (FIG. 7), when the same size is used, the left and right X-shaped link frames 5 and 6 are replaced with the X-shaped link frames 5 and 6. The X-shaped link frames 5 and 6 are allowed to intersect with each other by shifting the thickness of the member to the front or back.

  Further, the left and right X-shaped link frames 5, 6 are connected to each other by connecting the front and rear X-shaped links 50, 60 with the central axis 57, the central axis 67, and all the axes connecting the tips. Since the structure is formed, the frame body has a particularly high rigidity.

  And the upper fulcrum 52, 52, 62, 62 to which the left and right X-shaped link frames 5, 6 move is crossed in advance, and the lower fulcrum 54, 54, 64, 64 is crossed in advance. To do. According to this configuration, since the tips of the X-shaped link frames 5 and 6 intersect each other in advance, the opposite side after the state where they have started to intersect each other is the movement range of the tips of the X-shaped link frames 5 and 6. For this reason, the point just before the fulcrums 52, 62, 54, 64 inside the X-shaped link frames 5, 6 interfere with each other near the center is in the most closed state. That is, the upper work table 2 has the highest height.

  In this configuration, the range of movement of the left and right X-shaped link frames 5 and 6 is limited at a position near the center of the upper frame 3 or the lower frame 4, so that the X-shaped link frame is further increased. 5 and 6 do not close and become rod-shaped. On the contrary, since the left and right X-shaped link frames 5 and 6 always cross each other, they are not separated from each other. That is, the heights of the left and right X-shaped link frames 5 and 6 do not differ even if the X-shaped link frames 5 and 6 are opened and closed.

  In addition, the X-shaped link frames 5 and 6 having a frame structure that opens and closes through the intersection point include two Xs that are symmetrical in the front-rear direction as shown in FIGS. 9 (a), (b), (c), and (d). The at least two tips of each may be connected by a horizontal axis rod, and the centers of X may not necessarily be connected by the center shafts 57 and 67. In FIG. 9, the broken line indicates that there is no central axis.

(About the lift of the work table)
Here, the raising / lowering range of the work table 2 by opening and closing the X-shaped link frames 5 and 6 will be considered. If the member lengths of the left and right X-shaped link frames 5 and 6 are substantially the same as the lengths of the long sides of the rectangular upper frame 3 and lower frame 4, the work table 2 is about 3/4 of the length of the frames 3 and 4. Can be raised to a height corresponding to the length of and lowered to a height of about 1/5. In this way, the work table 2 can be raised and lowered in a wide range.

  In addition, if the X-shaped link frames 5 and 6 are completely opened and closed, a large force is required as initial power when returning from open to closed and from closed to open. For this reason, it is preferable to provide a stopper that stops opening and closing slightly before completely opening and closing.

  In this embodiment, the inner fulcrum 52, 62, 54, 64 interferes before the closing direction is fully closed, so a stopper is not necessary, but the opening direction requires a stopper before the opening direction is fully opened. However, the X-shaped link frames 5 and 6 are opened before the X-shaped link frames 5 and 6 are fully opened, as in the case where the length of the X diameter of the X-shaped links 50 and 60 is longer than the length of the frames 3 and 4. , 6 may interfere with each other and stop moving, so a stopper may not be necessary.

(About the stability of the work table)
Here, it is confirmed whether or not the uppermost work table 2 is always kept horizontal by opening and closing the X-shaped link frames 5 and 6. First, the X-shaped link frames 5 and 6 are considered as an integral frame structure because at least two ends of the single X-shaped links 50, 50, 60, and 60 that are paired in the front and rear are connected. Therefore, it can be said that the front and rear single X-shaped links 50, 50 (60, 60) are synchronized.

  Next, the synchronization and stability of the first X-shaped link frame 5 and the second X-shaped link frame 6, that is, the left and right X-shaped link frames 5, 6 will be considered. First, the relationship between the upper and lower frames and the X-shaped link frame will be considered. Even if the single X that opens and closes through the intersection point is opened and closed, the lines connecting the upper and lower ends of the X always form parallel lines. Therefore, if frames are provided above and below X, the upper and lower frames form parallel lines. On the other hand, an X of the same size that opens and closes through an intersection is provided in the extension line of the upper and lower frames, the two Xs are arranged on the left and right, and the upper and lower ends of one of the left and right Xs are connected to the outer end of the frame. If the other upper and lower ends are attached so as to be movable along the inside of the frame, the left and right Xs have the same degree of opening / closing depending on the upper and lower frame heights. In other words, it has been found that, due to the fact that X forms a frame parallel to the top and bottom, if the same size X is placed between the left and right common upper and lower frames, the left and right X are synchronized. Therefore, as long as this structure is adopted, the left and right Xs are robustly supported and can be said to be synchronized. In other words, other left and right X attachment methods cause problems such as failure to synchronize and lack of support stability.

  Hereinafter, a specific description will be given with reference to FIGS. 10 (a) to 10 (d).

  FIG. 10A shows a case where two frames are connected to each other instead of connecting to a common frame. In this case, since the left and right X-shaped link frames move separately, a step may be generated between the frames.

  FIG. 10B uses a common frame, but instead of rotatably mounting the outer fulcrum of the left and right X-shaped link frames, the left X-shaped link frame can rotate the outer fulcrum. Attachment, the right X-shaped link frame is a case where the inner fulcrum is rotatably attached. Since the left and right X-shaped link frames move separately, the work table may be inclined.

  FIG. 10C shows a case where a common frame is used, but the inner fulcrum of the left and right X-shaped link frames is rotatably attached and the outer fulcrum is slidably attached. Since the left and right X-shaped link frames try to move in the same way, the work table does not tilt. However, when the X-shaped link frame is closed, the left and right X-shaped link frames gather near the center of the workbench, so that the support is only near the center and the workbench becomes unstable.

  FIG. 10 (d) uses a common frame, but without crossing the left and right X-shaped link frames in advance, the movement range of the fulcrum of the X-shaped link frame exceeds the intermediate position of the frame and is closer to the side. This is a case where it can be removed. Since the left and right X-shaped link frames are separated from each other, the work table may be tilted while only one X-shaped link frame is closed and the other X-shaped link frame remains open.

  In this way, when the left and right X-shaped link frames are provided to change the height of the platform, the left and right X-shaped link frames can be synchronized and the work table can be supported horizontally and stably. There are three conditions as follows.

  That is, as shown in FIG. 11, (1) an upper frame 3 and a lower frame 4 common to the left and right X-shaped link frames 5 and 6 are provided on the upper and lower sides, and (2) the left and right X-shaped link frames 5 are provided. , 6 are rotatably mounted on the frames 3, 4 and the outer fulcrums 51, 53, 61, 63, and are movable along the upper frame 3 or the lower frame 4 at the inner fulcrums 52, 54, 62, 64. (3) The left and right X-shaped link frames 5 and 6 always cross each other.

  If these conditions are satisfied, the left and right X-shaped link frames 5 and 6 are moved up and down via the upper and lower frames 3 and 4 while being synchronized with each other and holding the upper and lower frames 3 and 4 in parallel. In this embodiment, these conditions are satisfied.

  Furthermore, since the left and right X-shaped link frames 5 and 6 are also moved in synchronization by the height adjusting mechanism of the work table 2 described later, the stability of the work table 2 is further improved regardless of the height. .

  Further, as shown in FIG. 12, the frame members of the upper and lower frames 3 and 4 are groove rails with a U-shaped cross section (or H-shaped), and the slide fulcrum is fitted to the groove rail so as to slide. It is preferable to configure. In this way, the fulcrums 52, 54, 62, 64 to which the X-shaped link frames 5, 6 move do not sink or float with respect to the frames 3, 4, and all the slide fulcrums 52, 54, 62 64 move horizontally along the frames 3 and 4, so that the upper and lower frames 3 and 4 are kept parallel. Thus, the U-shaped groove rail has a function of stably holding the uppermost work table 2 horizontally.

  Further, by adopting U-shaped (or H-shaped) groove rails as the frames 3 and 4, not only can the work table 2 be prevented from tilting, but also when the X-shaped link frames 5 and 6 fail. In addition, since the entire mechanism does not move, it also has an effect of functioning as a safety mechanism.

  Further, when used as an elevator, the law stipulates that the space (the hoistway) created by the work table 2 that moves up and down does not form a hollow space into which a person or the like enters by mistake. In this embodiment, the elevating space is always surrounded by the frame structure formed by the left and right X-shaped link frames 5, 6 and the upper and lower frames 3, 4, so that it is difficult to enter the hoistway. . Therefore, it is safe because humans do not enter the hollow space unless they intentionally enter and exit from the width direction. Further, an obstacle surface (plate) can be attached to the width forming surface as needed.

(Workbench height adjustment mechanism)
Next, a method for adjusting the height of the uppermost workbench 2 by opening and closing the X-shaped link frames 5 and 6 will be described.

  The conditions for adjusting the height are that the height adjustment tool is installed at a position where an operator on the table can always operate, and the left and right X-shaped link frames are used to maintain the level of the table. 5 and 6 are required to perform the same movement at the same time to achieve synchronization.

  As an example of a method that satisfies these conditions, in this embodiment, as shown in FIGS. 13A and 13B, a screw shaft with a rotating handle is provided at the center of the short side of the upper frame 3 to which the work table 2 is attached. A method of spanning the rod 7 is adopted.

  The screw shaft rod 7 has a forward thread groove in half and a reverse thread groove in the other half of the length center. A handle 71 is attached to one end of the screw shaft 7 as a rotating means for manually rotating the screw shaft 7. In addition, as a rotation means, you may comprise so that a gear may be rotated by pedal operation combining a pedal and a ratchet instead of the rotation handle 71. FIG. An electric motor or a controller can also be used.

  Further, the first shaft 59 and the second shaft 69 that connect the front-side X-shaped links 50 and 60 and the tips of the rear-side X-shaped links 50 and 60 have nuts at the center positions of the lengths. 58 and 68 are attached. The nut 58 is screwed into the screw groove in the forward direction of the screw shaft rod 7, and the nut 68 is screwed into the screw groove in the reverse direction of the screw shaft rod 7.

  Therefore, when the screw shaft 7 is rotated in the forward direction, the left and right first shafts 59 and second shafts 69 move so as to approach each other. When the screw shaft bar 7 is rotated in the opposite direction, the left and right first shafts 59 and second shafts 69 move away from each other. That is, when the screw shaft 7 is rotated in the forward direction, the work table 2 is raised, and when the screw shaft 7 is rotated in the reverse direction, the work table 2 is lowered.

  Thus, when the handle 71 is rotated, the fulcrums at the tips of the left and right X-shaped link frames 5 and 6 always move simultaneously and by the same width, so the left and right X-shaped link frames 5 and 6 are synchronized. Open and close. Further, when the rotation of the handle 71 is stopped, the movement of the nuts 58 and 68 screwed with the screw shaft 7 is stopped at the stopped position, and the opening and closing of the X-shaped link frames 5 and 6 is stopped.

  When an operator uses the work table apparatus 1, first, the folded work table apparatus 1 is carried to the work place, and then the operator rests on the work table 2 and turns the handle 71. Or by operating the pedal, the work table 2 is raised to a height at which it is easy to work. Next, the horizontal movement is dealt with by moving sideways on the workbench 2, but if it does not reach, the workbench 2 is once lowered and the workbench device after the worker descends to the ground. Move 1 sideways. In addition, a lateral movement and conveyance become easy by providing the wheel with a stopper in the lower part of the workbench apparatus 1. FIG.

  Further, by placing the entire work table device 1 on a cart, the work table 2 can be used as a cart that moves up and down. Compared with an existing lifting cart having a structure with only a single X-shaped link frame, this cart can take a large difference in height of the platform, and the support of the platform is stronger and more stable. Furthermore, in order to improve the stability of the workbench apparatus 1, protrusions or outriggers that protrude in the horizontal direction can be provided on the front, rear, left, and right sides of the ground contact portion. The stability can be further increased by extending the contact area by protruding the protrusion or the outrigger during use.

(effect)
Next, effects of the workbench apparatus 1 according to the first embodiment will be listed and described.

(1) A workbench device 1 according to the first embodiment is a workbench device 1 with adjustable height, a workbench 2 on which a person or an object is placed, an upper frame 3 that supports the workbench, The first X-shaped link frame 5 and the second X-shaped link that open and close via the intersection of X, connecting the lower frame 4 disposed below the frame 3, and the upper frame 3 and the lower frame 4. And a frame 6. The first X-shaped link frame and the second X-shaped link frame are configured to be able to cross each other.

  With such a configuration, the height of the work table 2 can be adjusted according to the work, and the work table 2 having the width and length necessary for the work can be stably supported. Further, by attaching a fulcrum that is rotatably supported to the outer end portion, the length of the diameter of the intersecting X-shaped link frames 5 and 6 can be increased to the length of the work table 2, so that the height difference is greatly increased. Can take.

(2) In addition, as shown in FIGS. 7A and 7B in the top view, the work table apparatus 1 according to the first embodiment has a width in the depth direction of the first X-shaped link frame 5 of the second depth. The X-shaped link frame 6 is wider than the width in the depth direction, and the second X-shaped link frame 6 is opened and closed inside the first X-shaped link frame 5 when viewed in the depth direction. . For this reason, the X-shaped link frames 5 and 6 can be crossed with a simple configuration, and the work table 2 can be stably supported, and a large difference in height can be obtained. Further, the first X-shaped link frame 5 and the second X-shaped link frame 6 can have the same shape except for the length of the shaft to be connected.

(3) Further, as shown in FIGS. 8 (a) and 8 (b) in the top view, the work table apparatus 1 according to the first embodiment has a second width in the depth direction of the first X-shaped link frame 5. The width of the X-shaped link frame 6 is substantially the same as the width in the depth direction. For this reason, the X-shaped link frames 5 and 6 can be crossed with a simple configuration, and the work table 2 can be stably supported, and a large difference in height can be obtained. Furthermore, the 1st X-shaped link frame 5 and the 2nd X-shaped link frame 6 can be made into the same shape.

(4) Specifically, the workbench device 1 according to the first embodiment is configured so that each of the first X-shaped link frame 5 and the second X-shaped link frame 6 has four upper and lower fulcrums arranged outside. 51, 51, 53, 53 (61, 61, 63, 63) are rotatably attached to the outer ends of the upper frame 3 and the lower frame 4, respectively, and four upper and lower fulcrums 52, 52, 54 arranged on the inner side. , 54 (62, 62, 64, 64) are slidably mounted along the upper frame 3 and the lower frame 4, respectively. The four upper and lower fulcrums 52, 52, 54, 54 inside the first X-shaped link frame 5 are the four upper and lower fulcrums 62, 62, 64, 64 inside the second X-shaped link frame 6. Can slide on the outer side of the second X-shaped link frame 6 closer to the fulcrum 61, 61, 63, 63, thereby the first X-shaped link frame 5 and the second X-shaped link frame 6. The mold link frame 6 intersects each other.

(5) Also, the two upper and lower slidable fulcrums 52 and 54 in which the two X-shaped link frames 5 and 6 are arranged inside the first X-shaped link frame 5 are the second X-shaped links. The inside of the first X-shaped link frame 5 by crossing in advance with the four upper and lower slidable fulcrums 62 and 64 arranged inside the link frame 6 and being fitted in a common groove. The four upper and lower fulcrum points 52 and 54 are closer to the outer fulcrum 51 and 53 of the first X-shaped link frame 5 than the upper and lower four fulcrum points 62 and 64 inside the second X-shaped link frame 6. It is supposed not to move to. Therefore, the two X-shaped link frames 5 and 6 always cross each other and do not separate from left to right. As a result, the left and right X-shaped link frames 5 and 6 are moved up and down in synchronization.

(6) Furthermore, the workbench apparatus 1 includes a first shaft 59 that connects the first X-shaped link 50 on the front side and the first X-shaped link 50 on the rear side, and a first shaft 59 on the front side. A second shaft 69 that connects the second X-shaped link 60 and the second X-shaped link 60 on the back side to each other, and is disposed at a position symmetrical to the first shaft 59 in the sliding direction. Two shafts 69, a first nut 58 fixed to the first shaft 59, and a second nut 68 fixed to the second shaft 69, symmetrical to the first nut 58 in the sliding direction. A second nut 68 disposed at a proper position, and a screw shaft bar 7 screwed into the first nut 58 and the second nut 68, the thread groove being in the reverse direction from the forward direction in the vicinity of the center of the length And a handle 71 as a rotating means for rotating the screw shaft 7. .

  By rotating the handle 71, the left and right X-shaped link frames 5 and 6 are synchronized with each other, and the first shaft 59 and the second shaft 69 come closer to the center of the screw shaft bar 7 or the center. The work table 2 can be moved up and down. Furthermore, if there is a rotation restraining means for restraining the rotation of the handle 71, the lifting and lowering of the work table 2 can be stopped more reliably, so that the handle 71 is used as a lifting and restraining means for restraining the lifting and lowering of the work table 2 more reliably. You can also

  Hereinafter, an elevator 8 as a stacked structure of work table devices configured by changing and combining a part of the work table devices described in the first embodiment will be described with reference to FIGS. In addition, the description which attaches | subjects the same code | symbol about the description of the same thru | or equivalent part as the content demonstrated in Example 1, and demonstrates.

  First, the configuration will be described. As shown in FIG. 14, the height of the workbench 2 can be changed in a wider range than in the first embodiment by stacking the workbench devices 81 and 82 and by allowing the left and right X to be separated into left and right. it can.

  Further, it is preferable that the lower slidable fulcrums 54 and 64 of the upper workbench device 81 and the slidable fulcrum 52 and 62 on the upper part of the lower workbench device 82 are connected to each other. By connecting in this way, the X-shaped link frames 5 and 6 of the upper work table device 81 and the X-shaped link frames 5 and 6 of the lower work table device 82 are synchronized, and the overall operation is stable. To do.

  As shown in FIGS. 15A and 15B, the stacked structure of the work table devices can be used as the elevator 8 by stacking several work table devices 81, 82,... As the power in this case, a jack can be arranged at the lowermost part to lift the first central shaft 57 and the like, or the central shafts of the X-shaped link frames 5 and 6 by wires, pulleys, gears, electric motors, etc. The distance between them may be tightened or released horizontally to open and close the left and right X-shaped link frames. In FIG. 15A, it seems that only one X-shaped link frame exists, but this is because the two left and right X-shaped link frames almost overlap.

  As shown in FIG. 16A, the work table apparatus 1 according to the present embodiment intersects the first X-shaped link frame 5 and the second X-shaped link frame 6 but does not intersect. It is configured to slip through the left and right sides. That is, the upper and lower frame structures, as shown in the cross-sectional views of FIGS. 16 (b) and 16 (c), are the upper frames 31, 32 and lower frames 41, 42 of an H-shaped structure (inner and outer U-shaped). By disposing a receiving rail at the tip of X that is movable on different surfaces of the same height, it is possible to pass through.

  Next, the X-shaped link frames 5 and 6 of the present embodiment are arranged and configured so as to pass through each other and be separated from each other left and right. There are several methods for moving the adjacent X-shaped link frames 5 and 6 left and right without interfering with each other. In this embodiment, FIGS. 17A and 17B or FIGS. 18A and 18B are used. A structure in which X-shaped link frames are arranged as shown in FIG.

  That is, as shown in FIGS. 17 (a), 17 (b) and 16 (b), the width (depth direction) of the left and right X-shaped link frames 5, 6 is changed so that one is an outer frame and the other is The inner frame has a size that the inner frame can be inserted inside the outer frame when viewed in the depth direction, and the corresponding slide fulcrum is not connected, or FIGS. 18 (a), 18 (b), and 16 (c). As shown in Fig. 5, when the same width (depth direction) is used, the left and right X-shaped link frames 5, 6 are arranged so as to be shifted to the front and back (depth direction) more than the thickness of the members of the X-shaped link frames 5, 6. Further, a configuration is adopted in which some corresponding slide fulcrums are not connected. Thus, if the corresponding slide fulcrum is not connected by the shaft, the shafts will not interfere with each other, so that they can pass through. 17 (a) and 18 (a) are diagrams in which the X-shaped link frame is closed, and FIGS. 17 (b) and 18 (b) are diagrams in which the X-shaped link frame is opened.

  Next, the effect will be described.

(1) The elevator 8 is configured by stacking the lower frame 4 of another second work table device 81 on the upper frame 3 of the first work table device 82 as a stacked structure of the work table device of the second embodiment. Has been.

  According to this configuration, the elevator 8 has a simple structure, but has a wide height range. Furthermore, since each of the link members 55, 56, 65 and 66 constituting the X-shaped link frames 5 and 6 can be made of a member having relatively small rigidity and light weight, it is lighter than a conventional elevator. It becomes a simple elevator.

(2) The upper fulcrum 52 on the inner side of the first X-shaped link frame 5 of the first workbench device 82 is below the inner side of the first X-shaped link frame 5 of the second workbench device 81. The upper fulcrum 62 on the inner side of the second X-shaped link frame 6 of the first workbench device 82 is connected to the fulcrum 54 on the side and slides integrally therewith. The X-shaped link frame 6 is connected to a lower fulcrum 64 inside the X-shaped link frame 6 so as to slide together.

  Therefore, the first and second X-shaped link frames 5 and 6 of all the work table devices 81 and 82 constituting the stacked structure of the work table devices are synchronized with each other while holding the work table 2 horizontally. Can be moved up and down. Further, when a large number of work table devices are stacked, by driving one work table device, all the work table devices can be driven in conjunction with each other.

  In addition, since it is as substantially the same as Example 1 about another structure and an effect, description is abbreviate | omitted.

(Comparison)
Here, a configuration (configuration I) in which the X-shaped link frames 5 and 6 always intersect with each other and do not intersect with each other as shown in the first embodiment, and an X-shaped link as shown in the second embodiment. A configuration including a state in which the frames 5 and 6 do not intersect with each other (Configuration II) is compared.

  First, a configuration (configuration I) that does not include a non-intersecting state will be described. Configuration I has the advantage of high perfection of synchronization and therefore high stability of the table at any height. In addition, since the X-shaped link frame can be made into a complete cubic frame, the toughness of the entire apparatus is also high. It is a demerit that the maximum height of the table is set slightly lower than that of Configuration II.

  Next, a configuration (configuration II) including a state where no intersection is made will be described. The advantage of the configuration II is that the maximum height can be set to be slightly higher than that of the configuration I. When X is closed and close to the maximum, it becomes a sharp angle. A large initial force is required to return X to the open position, and the left and right X synchronization is lower than that of Configuration I, so it is slightly unstable. The disadvantage is that there is a risk. However, this risk is greatly reduced by adopting a U-shaped (or H-shaped) frame. Further, since at least one of the first and second X-shaped link frames is not a complete cubic frame because a part of the cubic frame is open, it is disadvantageous that the toughness is slightly inferior to the configuration I. .

  Next, with reference to FIGS. 19A, 19 </ b> B, and 19 </ b> C, the temporary scaffold 9 as the laminated structure of the work table apparatus described in the first and second embodiments will be described. In addition, the description which attaches | subjects the same code | symbol about the description of the part same or equivalent to the content demonstrated in Example 1,2.

  First, the configuration will be described. The temporary scaffold 9 as a laminated structure of the work table apparatus of the present embodiment is configured by arranging a plurality of work table apparatuses 1 which are unit structures in the vertical direction (vertical direction) and the horizontal direction (horizontal direction). is there. Specifically, it has a structure of 4 vertical lines and 3 horizontal lines. The work table devices 1 having a unit structure are connected to each other by a connection fitting or the like so as to enhance stability. And the scaffolding plate 91 for a worker to walk is arrange | positioned at each step | level, and the handrail is arrange | positioned at the uppermost step. Further, an auxiliary scaffold plate 911 may be projected in the working direction. Further, in this embodiment, there is no central shaft 57, 67 (see FIG. 5) for connecting the front and rear of the X-shaped link frame because it hinders workers from walking, but the front and rear link members are respectively It has a rotating structure (see FIG. 19C). Furthermore, a jack base is attached to the unit structure (workbench apparatus 1) located at the lowermost portion as an adjustment means for adjusting unevenness of the installation location and unevenness in height.

  Next, the installation procedure of the temporary scaffold 9 will be described. First, three sets of stacked bodies in which four work table devices 1 are vertically stacked and connected are prepared and transported to the site. Next, three sets of laminates are placed side by side on the ground. At this time, a unit structure jack base located at the lowermost part is used to align the height with the adjacent stacked body. Finally, each of the three sets is set up to have the same height, and the installation is completed by connecting with the horizontal set using a connecting bracket or the like. According to the above installation procedure, the temporary scaffold 9 can be installed in a short time after the laminate is transported to the site.

  In the temporary scaffold 9 of the present embodiment, the work table device 1 is used as a table fixed at a fixed height rather than using the function of moving up and down. The time can be greatly shortened compared to the setting time of the current temporary scaffold. That is, the number of parts is small compared to the current temporary scaffolding (framework scaffolding: composed of a torii-style building frame, bracing, steel cloth board, jack base, etc.) (the temporary scaffolding 9 of this embodiment has a unit structure) Because it is easy to assemble as a whole, it can be installed in a very short time.

  In addition, since it is as substantially the same as Example 1, 2 about another structure and an effect, description is abbreviate | omitted.

  The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to the present invention. included.

  For example, the workbench device 1 according to the second embodiment is configured such that the first X-shaped link frame 5 and the second X-shaped link frame 6 are separated from each other without crossing. Although described, the present invention is not limited to this. As the workbench apparatus 1 according to the second embodiment, a configuration that always intersects and does not cross can be employed as in the workbench apparatus 1 according to the first embodiment.

  Furthermore, although the workbench device or the laminated structure of the workbench devices according to the first and second embodiments has been described for use as a workbench or an elevator, the present invention is not limited to this and is not limited to this. It can also be used as Example 3).

  Moreover, although Example 2 demonstrated the case where two or three worktable apparatuses were piled up, it is not limited to this, You may pile up four or more.

  Further, the workbench device is not limited to the configuration in which the two X-shaped link frames 5 and 6 are arranged side by side, and two or more sets of X-shaped links are made with the two X-shaped link frames 5 and 6 as one set. You may arrange a frame horizontally.

  In the second embodiment, the case where work table devices 81 and 82 having the same shape are used is described. However, the present invention is not limited to this, and work table devices having different link member lengths for each layer are stacked. You can also

  In addition, in Example 3, although demonstrated as what conveys a vertical | stacked 4 layer laminated body in an installation procedure, it is not limited to this. Each unit structure (workbench apparatus 1) can be transported and assembled on site. By doing so, it can be assembled in order from the lower layer, and the temporary scaffold 9 (framework scaffold) can be assembled manually.

DESCRIPTION OF SYMBOLS 1 Worktable apparatus 2 Worktable 3 Upper frame 4 Lower frame 5 1st X-shaped link frame 51,52 Support point 53,54 Support point 57 1st center axis 58 Nut 59 1st axis | shaft (slide axis)
6 Second X-shaped link frames 61, 62 fulcrum 63, 64 fulcrum 67 second central axis 68 nut 69 second axis (slide axis)
7 Screw shaft bar 71 Handle 8 Elevator 81 Work table device (upper stage)
82 Work table device (lower)
9 Temporary scaffolding

Claims (5)

A height adjustable workbench device,
A work table on which a person or object is placed;
An upper frame that supports the workbench;
A lower frame disposed below the upper frame;
A first X-shaped link frame and a second X-shaped link frame that connect the upper frame and the lower frame and that open and close via an intersection of X;
The first X-shaped link frame and the second X-shaped link frame are configured to cross each other ,
The width in the depth direction of the first X-shaped link frame is made wider than the width in the depth direction of the second X-shaped link frame, and in the depth direction, on the inside of the first X-shaped link frame. A workbench device in which the second X-shaped link frame is configured to open and close . A height adjustable workbench device,
A work table on which a person or object is placed;
An upper frame that supports the workbench;
A lower frame disposed below the upper frame;
A first X-shaped link frame and a second X-shaped link frame that connect the upper frame and the lower frame and that open and close via an intersection of X;
The first X-shaped link frame and the second X-shaped link frame are configured to cross each other ,
The width of the first X-shaped link frame in the depth direction is substantially the same as the width of the second X-shaped link frame in the depth direction. The workbench device. Each of the first X-shaped link frame and the second X-shaped link frame has four upper and lower fulcrums arranged on the outer side and rotatably attached to the upper frame and the lower frame, respectively. The four upper and lower fulcrum points are slidably attached along the upper frame and the lower frame,
The upper and lower four fulcrum points inside the first X-shaped link frame are the upper and lower four fulcrum points outside the second X-shaped link frame than the four upper and lower fulcrum points inside the second X-shaped link frame. It is slidable on the side close to the fulcrum,
The upper and lower four fulcrum points inside the second X-shaped link frame are the upper and lower four fulcrum points outside the first X-shaped link frame than the upper and lower four fulcrum points inside the first X-shaped link frame. The workbench device according to claim 1, wherein the workbench device is slidable on a side close to one fulcrum. A stack structure of a workbench device configured by superposing a lower frame of a second workbench device on an upper frame of the first workbench device;
The first workbench device and the second workbench device are respectively
A work table device capable of height adjustment, a work table on which a person or an object is placed, an upper frame that supports the work table, a lower frame disposed below the upper frame, and the upper frame And a first X-shaped link frame and a second X-shaped link frame that open and close via an intersection of X, and that connect the first X-shaped link frame and the lower frame. The second X-shaped link frame is configured to be able to cross each other ,
The upper fulcrum inside the first X-shaped link frame of the first workbench device is a lower fulcrum inside the first X-shaped link frame of the second workbench device. Connected to slide together,
The upper fulcrum inside the second X-shaped link frame of the first workbench device is a lower fulcrum inside the second X-shaped link frame of the second workbench device. A stacked structure of work table devices that are linked and slide together. A lower frame of the second workbench device according to claim 1 or 2 is overlapped on an upper frame of the first workbench device according to claim 1 or 2. A stacked structure of work table devices,
The upper fulcrum inside the first X-shaped link frame of the first workbench device is a lower fulcrum inside the first X-shaped link frame of the second workbench device. Connected to slide together,
  The upper fulcrum inside the second X-shaped link frame of the first workbench device is a lower fulcrum inside the second X-shaped link frame of the second workbench device. A stacked structure of work table devices that are linked and slide together.