JP6255199B2 - Stepladder platform - Google Patents

Description

The present invention relates to a stepladder-type work table that allows a floor top plate to be unfolded and stored in conjunction with opening and closing of a leg.

Conventionally, a stepladder-type workbench is constructed such that a first leg and a second leg each provided with support posts on the left and right are pivotably connected to each other via an upper pivoting means, and a floor top plate is attached to both legs. The working space is formed by extending the extension column portion of the support column above the floor top plate.

The first leg constitutes an elevating leg in which left and right columns are connected by a step bar, and the second leg constitutes a non-elevating leg in which the left and right columns are connected by a connecting bar. Therefore, the worker can move up and down from the lifting legs to the working space and perform work at a high place on the floor top plate. At this time, if a frame surrounding the work space is provided, the safety of the work of the worker is ensured.

Registered Utility Model No. 3180629

The stepladder-type workbench can be opened and closed by a pivoting means in which the upper ends of the first leg and the second leg are pivoted. When the legs are opened so as to spread downward, both legs The floor top plate erected between the two is placed in a horizontal position, enabling work at high places. After the work, when the legs are closed so that they are parallel, the floor top plate is placed in the vertical orientation and stored between the legs.

In the case of Patent Document 1, the base end of the floor top plate is pivotally attached to the first leg, and the stay that supports the lower surface of the floor top plate is pivotally attached to the second leg, and the tip of the stay is attached to the floor top. By linking to the plate, a link mechanism is configured. Therefore, when both legs are opened and closed, the stay rotates while being reversed with respect to the floor top plate. In the open leg state, the stay is in a horizontal posture and is superimposed on the lower surface of the floor top plate. In the closed leg state, the floor top plate is set to a vertical posture in which the tip portion is directed upward from the base end portion pivotally attached to the first leg, and similarly, the stay is also set to a vertical posture upward from the second leg. Is done.

However, in the case of a link mechanism constituted by such a stay, in the open leg state, the floor top plate and the stay overlap in parallel in a horizontal posture and are stretched between both leg bodies. It cannot be rotated. Therefore, in order to close the legs, it is necessary to first lift the floor top plate in the upward position, guide the stay and the floor top plate in the direction of refraction, and then turn both legs in the direction of closing the legs. There are difficulties.

In the closed leg state, since the floor top plate and the stay that overlap in the vertical orientation are interposed between the first leg and the second leg, it is difficult to bring both legs close to each other. In addition, when the leg is opened from the closed leg state, unlike the case where the leg is closed from the above-mentioned open leg state, the floor top plate and the stay can be deployed simply by expanding both legs, so that the closed leg stand type There is a risk that both legs will inadvertently open while the operator is transporting the platform.

Further, in the case of Patent Document 1, since the frame folding mechanism and the opening / closing mechanism by the pivoting means of both legs are separately configured, when closing the legs, the work of closing both legs and the frame from the horizontal posture are performed. Two operations are required to change the posture to the vertical posture. Similarly, when opening the legs, two operations are required to open both legs and to change the posture of the frame from the vertical posture to the horizontal posture. There is also a problem that it is complicated.

The present invention provides a stepladder-type workbench that solves the above-mentioned problems, and is constructed as a means for pivoting the first leg and the second leg each provided with struts on the left and right sides so that they can be opened and closed. In a stepladder-type work table formed by forming a work space above the floor top plate installed on both legs, the floor top plate is placed in a horizontal posture and vertically in conjunction with the opening and closing of the legs. An interlocking mechanism for changing the posture between the orientation postures, and the interlocking mechanism pivotally attaches the base end portion of the floor top plate and the first leg so as to be rotatable around the horizontal axis. A movable connecting means for connecting the floor top plate and the second leg movably to each other is configured. The moving connecting means includes a shaft means provided on one of the floor top board and the second leg, and the other. The guide means is provided, and the shaft means is moved along the guide means following the change in the intersection angle between the floor top plate and the second leg. The shaft means and the guide means are configured such that, when the legs are opened, the shaft means is moved toward one end of the guide means, thereby rotating the floor top plate to the horizontal posture, When the body is closed, the shaft means is moved toward the other end of the guide means so that the floor top plate is rotated in the vertical orientation , and the pivot attachment means is configured to When the distal end portion of the pivot bracket projecting from the base end portion of the pivot bracket toward one of the upper and lower directions is pivotally attached to the first leg and both legs are closed, the rotation radius of the pivot bracket is The floor top plate is configured to be stored between the left and right columns of the second leg by setting the floor top plate in a vertical posture .

In a preferred embodiment of the present invention, a locking means is provided at the tip of the floor top plate, and the first locking means for releasably locking the locking means when the floor top plate is in a horizontal posture is provided in the first embodiment. In addition to being provided on the two legs, the first legs are provided with second locking means for detachably locking the locking means when the floor top plate is in the vertical orientation.

Further, in a preferred embodiment of the present invention, in the open leg state, the left and right columns of the first leg and the second leg are extended above the floor top plate to form an extension column, and the extension column is provided with the above-described extension column. A frame having left and right frames surrounding at least three sides of the work space and an intersecting frame is provided, and an upper end portion of the extension column and the left and right frames of the frame are opposed to each other between the first leg and the second leg. and providing the first pivotally connected section and the second pivotably connected means pivotally connected to each other, in a state where the left and right frame and sideways posture, the pivot of the pivot position and a second pivotably connected means of the first pivot connection means The positions are spaced apart from each other by a predetermined distance in the laterally extending direction of the left and right frames, and at a predetermined distance in the vertical direction , the pivot position of the first pivot means is disposed below the pivot position of the second pivot means. From one leg to the other. When the first pivot means is raised, the first pivot means pushes up the left and right frames so that the left and right frames of the frame body and the pair of extension pillars are folded in parallel so that both legs are closed. It is composed.

According to the present invention as set forth in claim 1, legs that can change the posture of the floor top board 5 between the horizontal posture and the vertical posture in conjunction with the opening and closing operations of the first leg 2 and the second leg 3. A vertical workbench is provided. In particular, the floor top plate 5 does not require an operation such as artificially lifting the floor top plate 5 in the posture changing direction when the leg is closed from the open state in the horizontal posture, and the vertical direction from the initial movement of the closed leg operation. Since the posture is changed in the direction of the posture, the leg closing operation is simple and easy. Moreover, since the interlocking mechanism 17 of the floor top plate 5 does not include a link mechanism or the like, a compact closed state in which both legs 2 and 3 are brought as close as possible is possible. And since the front-end | tip part of the pivot bracket 20 protruded toward the any one of the up-down direction from the base end part of the floor top plate 5 is pivotally attached to the 1st leg body 2, the said pivot is supported at the time of a leg closure. By setting the floor top plate 5 in the vertical orientation on the rotation radius R of the bracket 20, the floor top plate 5 can be compactly stored between the left and right columns 3 a and 3 a of the second leg 3.

According to the second aspect of the present invention, when the legs are opened, the locking means 28 is locked to the first locking means 29, so that the legs 2 and 3 are closed by the floor top plate 5 placed in the horizontal position. Since it is fixedly held in an incapable state, it is possible to ensure the safety of work at high places, and when the legs are closed, the locking means 28 is locked to the second locking means 30 so that the floor top plate is in a vertical orientation. 5, the legs 2 and 3 are fixedly held in a state in which the legs cannot be opened, so that the risk of the legs 2 and 3 being inadvertently opened when the stepladder-type work table is transported can be prevented.

According to the third aspect of the present invention, when the legs 2 and 3 are closed from the open leg state, the first pivoting means 11 is lifted together with the one leg 2, and both legs are moved by the frame 6. It is possible to close the legs 2 and 3a of the bodies 2 and 3 in a folded state in parallel. On the contrary, when the legs 2 and 3 are opened from the closed leg, the first leg together with the one leg 2 is the first. The legs 2 and 3 can be opened by the frame 6 simply by lowering the pivoting means 11, and the closed and opened legs and the frame 6 can be folded and unfolded simultaneously by one-touch operation. There is an effect that can be.

It is a perspective view which shows the leg-opening state of the stepladder type work bench | platform which concerns on one Embodiment of this invention. It is a side view showing an open leg state of a stepladder type work table concerning one embodiment of the present invention. The structure and action of the extension column part and the frame pivoting means in the leg column are shown, (A) is a side view showing the state of the pivoting means when the legs are opened, and (B) is when the legs are closed. It is a side view which shows the state of this pivoting means. It is a perspective view which shows one Embodiment of the movement connection means between a floor top plate and both legs in a decomposition | disassembly state. 1 shows one embodiment of a moving connecting means, where (A) is a side view and (B) is an enlarged cross-sectional view taken along line AA. The action of a movement connection means is shown, (A) is a sectional view showing an action at the time of leg closing operation, and (B) is a sectional view showing a closed leg completion state. The work procedure and operation | movement which close a stepladder type work stand from an open leg state are shown, (A) (B) (C) (D) is a side view which shows a work procedure in order.

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

As shown in FIGS. 1 and 2, the stepladder-type workbench 1 pivots the first leg 2 and the second leg 3 so as to be openable and closable via an upper pivoting means 4. A floor top plate 5 installed on both legs 2 and 3 and a frame body 6 disposed above the floor top plate 5 are provided. In addition, as shown by a chain line in FIG. 1, it is preferable that both legs 2 and 3 constitute an extendable leg.

The first leg 2 constitutes an elevating leg 2A in which the left and right columns 2a, 2a are connected by a multistage stepping bar 7. The second leg 3 has the left and right columns 3a, 3a connected by a connecting bar 8. A non-lifting leg 3A is configured. Therefore, with the legs 2 and 3 open, the operator is allowed to move up and down on the floor top plate 5 from the lifting legs 2A, and is not allowed to lift from the non-lifting legs 3A.

Both legs 2, 3 have extended column portions 2b, 2b and extended column portions 3b, 3b extending from the columns 2a, 2a and columns 3a, 3a extending above the floor top plate 5, A work space is formed above 5.

The frame 6 includes left and right frames 9 and 9 and an intersecting frame 10 that surround at least three sides of the work space. In the case of the figure, the frame 6 faces the cross frame 10 above the non-lifting leg 3A and opens the work space toward the lifting leg 2A, but the crossing frame faces above the lifting leg 2A. May be provided.

In the stepladder type work table 1 having such a configuration, the upper ends of the extension pillars 2b and 3b facing each other between the first leg 2 and the second leg 3 are mutually connected with each other as shown in FIG. As shown in FIG. 3, the left and right frames 9 are arranged at predetermined intervals in the axial direction, and the upper ends of the pair of extension pillars 2b and 3b are connected to the left and right frames 9 of the frame 6 by the first pivoting means 11. The pivoting means 4 is constituted by pivoting with the second pivoting means 12. In the case of the illustrated embodiment, a bracket 15 made of a right-angled triangular metal plate is fixed to the left and right frames 9, and a shaft member is pivotally supported on the bracket 15, thereby the first pivoting means 11 and the second pivoting means. 12 is constituted.

At this time, the pivot position P1 of the first pivoting means 11 and the pivot position P2 of the second pivoting means 12 are such that the left and right frames 9 are in the horizontal orientation with the left and right frames 9 in the horizontal posture as shown in FIG. The extension position is spaced apart by a predetermined distance L1 and the vertical position is spaced by a predetermined distance L2, and the pivot position P1 of the first pivoting means 11 is disposed below the pivot position P2 of the second pivoting means 12. Has been. Accordingly, the pivot position P1 is separated from the left and right frames 9 by a predetermined distance L2 from the pivot position P2, and the pivot position P1 is more than the pivot position P2 by the distance L2 in a state where both legs 2 and 3 are opened. It is configured to be lower.

In the case of the illustrated embodiment, the bracket 15 is fixed to the outer side surfaces of the left and right frames 9 and is disposed so as to face the inner side of the upper end portions of the extension column portions 2b and 3b. As illustrated, the upper end portion of the extension column portion 2b of the first leg 2 is formed to be shorter than the upper end portion of the extension column portion 3b of the second leg 3 corresponding to the predetermined distance L2. The first pivoting means 11 and the second pivoting means 12 are configured by axially attaching the bearing brackets 13 and 14 fixed to the upper ends of the respective extension column portions 2b and 3b to the bracket 15.

In the illustrated embodiment, the first pivoting means 11 and the second pivoting means 12 are configured via a bracket 15 made of a single metal plate. However, the present invention is not limited to such a configuration of the bracket 15. Instead, any means that enables the predetermined intervals L1 and L2 may be used. In the case where the first pivoting means 11 and the second pivoting means 12 are connected and integrated by the bracket 15 as in the illustrated embodiment, the frame body 6 is not necessarily provided.

As a result of the above configuration, when the posture of the first leg 2 is changed to the upright posture from the state where the legs 2 and 3 are opened as shown in FIG. Pushes up the bracket 15 via the first pivoting means 11, so that the bracket 15 and the left and right frames 9 are rotated with the second pivoting means 12 as a fulcrum. Therefore, when the legs 2 and 3 are closed, as shown in FIG. 3B, the left and right frames 9 and the pair of extension pillars 2b and 3b are folded so as to have a vertical posture parallel to each other.

At this time, the left and right frames 9 are positioned inside the extension pillar 3b of the second leg 3, and the pivot P2 of the second connecting means 12 is at the intersection of the center axis of the left and right frames 9 and the center axis of the extension pillar 3b. If it is set as the arrangement | positioning, as shown to FIG. 3 (B), the right-and-left flame | frame 9 will overlap and be fitted inside the extension pillar part 3b of the 2nd leg 3, and will enable compact folding.

In the folded state, the pivot position P1 of the first pivoting means 11 is positioned higher than the pivot position P2 of the second pivoting means 12 corresponding to the predetermined interval L1. Therefore, in the folded stepladder type work table 1, the lower end of the first leg 2 is lifted off the ground with the lower end of the second leg 3 grounded. Therefore, in the case of the illustrated embodiment, in order to improve the opening / closing operation and operability of both legs 2 and 3, the extension support portions 2b and 3b that are opposed to each other between the legs 2 and 3 can be freely rotated. A link arm 16 to be connected is provided (see FIGS. 1 and 2).

The floor top plate 5 installed on the first leg body 2 and the second leg body 3 moves the floor top panel 5 in a horizontal posture and a vertical posture in conjunction with the opening and closing leg operations of both legs 2 and 3. An interlocking mechanism 17 that changes the posture between the two is provided, and the interlocking mechanism 17 pivotally attaches the base end portion of the floor top plate 5 and the first leg 2 so as to be rotatable around the horizontal axis. A means 18 and a moving connecting means 19 for connecting the floor top plate 5 and the second leg 3 so as to be movable are configured. The horizontal posture of the floor top 5 is preferably a horizontal posture, and the vertical posture is preferably a vertical posture.

In the illustrated embodiment, the first leg 2 constitutes the lifting leg 2A, and the second leg 3 constitutes the non-lifting leg 3A. However, the first leg 2 may be configured to be opposite.

As shown in FIGS. 4 to 6, the pivoting means 18 extends pivot brackets 20, 20 downward from both side surfaces of the base end portion of the floor top plate 5. A pivotal support bracket 21 fixed to the inside of the support 2 a of the leg 2 is pivotally attached via a pivot 22. At this time, as shown in FIG. 5, the rotation radius R of the pivot bracket 20 defined by the perpendicular extending from the axis extending from the center of the side surface of the floor top plate 5 to the center of the pivot 22 is the first pivoting means 11 described above. And the second pivoting means 12 is preferably configured to be equal to the predetermined distance L2.

In the case of the illustrated embodiment, it is preferable that the pivot bracket 20 and the pivot bracket 21 are provided with a recess 23 and a pin 24 that form a recess and abut when the floor top plate 5 is in a horizontal posture. .

The moving connecting means 19 includes guide means 25 provided on both side surfaces of the floor top plate 5 and shaft means 26 provided on the inner sides of the columns 3a, 3a of the second leg 3, and the first leg 2 and the first When the biped body 3 is opened and closed, the shaft means 26 is moved along the guide means 25 following the change in the crossing angle between the floor top plate 5 and the second leg 3.

In the case of the illustrated embodiment, the guide means 25 is formed by a guide groove 25 a made of a slit extending along the side surface of the floor top plate 5, and the shaft means 26 is formed inside the support 3 a of the second leg 3. The guide pin 26a protrudes from the support bracket 27 fixed to the guide bracket 26a. The guide pin 26a is inserted into the guide groove 25a so as to be rotatable and slidable. Are movably connected.

Therefore, when the first leg 2 and the second leg 3 are closed, the shaft means 26 and the guide means 25 face the base means of the guide means 25 (the base end of the floor top plate 5). When the floor top plate 5 is rotated toward the vertical posture with the pivoting means 18 as a fulcrum and the legs 2, 3 are opened, the shaft means 26 is guided to the guide means 25. The floor top plate 5 is configured to turn toward the horizontal posture with the pivoting means 18 as a fulcrum by moving toward the front end portion (the end facing the free end of the floor top plate 5). Yes.

The floor top plate 5 is provided with a locking means 28 at the tip, and correspondingly, a first locking means 29 is provided on the second leg 3 and a second locking means is provided on the first leg 2. 30 is provided. The locking means 28 is detachably locked to the first locking means 29 when the floor top plate 5 is in a horizontal posture, and is locked to the second locking means 30 when the floor top plate 5 is in a vertical posture. It is configured to engage and disengage.

In the case of the illustrated embodiment, the lock means 28 includes a rod 31 having a locking protrusion 31a that protrudes forward and backward from the lower side of the floor top plate 5 and a support means 32 that slidably supports the rod 31. A spring 33 that normally biases the locking projection 31a in the protruding direction is provided, and the operation portion 31b is formed by bending the tail end of the rod 31 downward.

The floor top plate 5 has a pair of locking means 28, 28 disposed on both sides of the lower surface by fixing the support means 32 to the lower surface, and a locking projection of the rod 31 biased by the spring 33. The part 31a protrudes from the lower side of the floor top plate 5 to the side. The operation portions 31b and 31b of the pair of lock means 28 and 28 are arranged at an interval at which an operator can simultaneously draw with one hand, and the rod 31 is moved by the operation portion 31b. The part 31a is retracted.

The first locking means 29 is constituted by a locking hole 29a of a support bracket 27 provided in the support 3a of the second leg 3, and the floor is formed by opening the first leg 2 and the second leg 3. When the top plate 5 is in a horizontal posture, the locking projection 31a of the locking means 28 is inserted into the locking hole 29a, and the floor top plate 5 is locked and fixed so as not to rotate.

The second locking means 30 is constituted by a locking hole 30a of a pair of projecting pieces 34, 34 provided in the step 7 of the first leg 2, and the first leg 2 and the second leg 3 are closed. Thus, when the floor top plate 5 is set in a vertical posture, the locking projection 31a of the locking means 28 is inserted into the locking hole 30a, and the floor top plate 5 is locked and fixed so as not to rotate.

Thus, when both legs 2 and 3 are closed and the floor top plate 5 is in a vertical posture, the support means 32 and the projecting piece 34 are engaged with each other as shown in FIG. The protrusion 31a and the locking hole 30a are positioned between the legs 2, 3, and the axial distance S extending between the centers of the legs 2, 3 is set to the distance between the first pivoting means 11 and the second pivoting means 12. It is preferable to configure so as to be equal to the predetermined distance L2.

5 and 6 show the operation of the interlocking mechanism 17. When the first leg 2 and the second leg 3 are opened, as shown in FIG. 5 (A), both the legs 2 and 3 are spread so that the shaft means 26 is directed toward the tip of the guide means 25. The floor top plate 5 is moved to the horizontal posture with the pivot means 18 as a fulcrum, and the concave portion 23 of the pivot bracket 20 abuts against the pin 24 of the pivot bracket 21, so that the floor top plate 5 is Hold in a horizontal position. In this state, the floor top plate 5 has a base end portion supported by the pivot shaft 22 and a tip end portion supported by the guide pin 26a, and can suitably support the load of the operator. Is locked to the first locking means 29.

As shown in FIG. 4, the support bracket 27 provided with the first locking means 29 composed of the locking hole 29a forms a guide surface 27a with an inclined wall surface facing the locking hole 29a. When the top plate 5 is rotated so as to be in a horizontal posture, the locking projection 31a of the rod 31 is retreated by sliding along the guide surface 27a, and the locking projection 31a enters the locking hole 29a. It is preferable that the spring 33 is automatically inserted into the locking hole 29a when it faces.

When the locking means 28 is locked and fixed to the first locking means 29 in a state where the legs 2 and 3 are opened, the floor top plate 5 connects the legs 2 and 3 in a non-rotatable state. Accordingly, the two legs 2 and 3 are fixedly held in a state in which the legs cannot be closed, thereby ensuring the safety of the operator's work at a high place.

When the first leg 2 and the second leg 3 are closed from the open state, the locking means 28 is retracted by pulling the pair of operation portions 31b and 31b and retracting the locking projection 31a from the locking hole 29a. Then, after releasing the locking of the first locking means 29, the legs may be closed while lifting the first leg 2 as described above. As a result, as shown in FIG. 6 (A), the first leg 2 moves relatively upward and the second leg 3 moves downward, while reducing the distance between them and Since the crossing angle between the provided guide groove 25a and the second leg 3 is changed, the guide pin 26a moves toward the base end portion of the guide groove 25a, and the guide groove 25a is pushed to move the floor top. The plate 5 is rotated downward toward the vertical posture.

As shown in FIG. 4, the projecting piece 34 provided with the second locking means 30 comprising the locking hole 30a forms a guide surface 34a with an inclined wall surface facing the locking hole 30a. When the top plate 5 is rotated so as to be in a vertical posture, the locking projection 31a of the rod 31 is retreated by sliding along the guide surface 34a, and the locking projection 31a enters the locking hole 30a. It is preferable that the spring 33 is automatically inserted into the locking hole 30a when it faces.

When the locking means 28 is locked and fixed to the second locking means 30 with the legs 2 and 3 closed, the floor top 5 connects the legs 2 and 3 in a non-rotatable state. Therefore, since both legs 2 and 3 are fixed and held in a state in which the legs cannot be opened, when the operator carries the folded stepladder-type work table, both legs 2 and 3 are inadvertently opened. It is not.

As described above with respect to the first pivoting means 11 and the second pivoting means 12 constituting the pivoting means 4, in the closed leg state, the column 2a including the extension column portion 2b of the first leg 2 and the second leg The support column 3a including the three extension column portions 3b is in a parallel vertical posture with a predetermined distance L2 in a state where the left and right frames 9 of the frame body 6 are overlapped with the extension column portions 3b and 3b. Folded. In response to such compact folding of the legs 2 and 3, the interlocking mechanism 17 of the floor top plate 5 is, as described above, the turning radius R of the pivot bracket 20, the support means 32 of the lock means 28, and the first means. The interval S formed by the protruding piece 34 of the two locking means 30 is configured to be equal to the predetermined distance L2. Therefore, as shown in FIG. 6 (B), the base end portion of the floor top plate 5 is in the vertical orientation on the rotation radius, and the distal end portion is in the vertical orientation maintaining the interval S. The floor top plate 5 is entirely placed in a vertical posture, and is fitted over the columns 3a and 3a of the second leg 3 so as to be stored compactly.

When the first leg 2 and the second leg 3 are opened from the closed leg state, the locking means 28 is retracted by pulling the pair of operating portions 31b and 31b and retracting the locking protrusion 31a from the locking hole 30a. And after releasing the locking of the second locking means 30, both legs 2 and 3 may be expanded. As a result, the distance between the legs 2 and 3 is increased, and the crossing angle between the guide groove 25a provided in the floor top plate 5 and the second leg 3 is changed, so that the guide pin 26a is provided at the tip of the guide groove 25a. The floor top plate 5 is rotated upward toward the horizontal posture by pushing the guide groove 25a while moving toward the horizontal direction.

In the case of the illustrated embodiment, the locking means 28 is constituted by a locking projection 31a of a rod 31 which can be moved forward and backward, and the first locking means 29 and the second locking means 30 are constituted by locking holes 29a and 30a, respectively. However, the opposite configuration, that is, the locking means 28 is constituted by a locking hole, and the first locking means 29 and the second locking means 30 are respectively locked in the locking holes so as to be freely disengaged. You may comprise by a protrusion.

FIG. 7 shows an operation procedure and an action for closing the stepladder-type workbench 1 configured as described above from the open leg state. When performing the leg closing work from the open leg state shown in FIG. 7A, first, the upper end of the first leg 2 is raised. For example, as shown in FIG. 7B, if the first leg 2 is in an upright posture, the upper end can be easily raised. Thereby, since the 2nd leg 3 descends relatively with respect to the 1st leg 2, the left and right frames 9 of the frame 6 start to rotate as described above, and the floor top plate 5 guides. The rotation is started by the sliding of the pin 26a. Therefore, as shown in FIG. 7C, when the second leg 3 is grounded and the first leg 2 is lifted, the legs 2 and 3 are closed so as to be in a parallel posture as described above, and the frame The body 6 is stored between the columns 3a and 3a of the second leg 3, and the floor top plate 5 is stored between the columns 3a and 3a of the second leg 3, so that it is shown in FIG. Such a compact folded state is obtained. When the stepladder type work table 1 is opened from the closed leg state, the work procedure opposite to the above may be performed.

Therefore, when the stepladder-type work table 1 is closed from the open leg state, it is only necessary to change the posture of the first leg 2 so as to be in an upright posture and to ground the second leg 3, In addition, when the legs are opened from the closed state, it is only necessary to open both legs 2 and 3 while lowering the first leg 2 in the lifted state, and any work can be easily and easily performed with one touch.

At this time, the first leg 2 that is operated by being held by the operator's hand constitutes the elevating leg 2A as described above, so that the work is further facilitated. That is, when the legs are opened, the operator can perform the leg opening work from the front side of the first leg 2 (elevating leg 2A), and after the legs are opened, the worker can ascend immediately from the position of the leg opening to the upper working space. . Further, when closing the legs, the operator can perform the leg closing work immediately from the position after descending to the ground from the work space via the first leg 2 (elevating leg 2A).
[Another embodiment]

With respect to the opening / closing mechanism of both legs 2, 3, the pivot position P1 of the first pivoting means 11 and the pivot position P2 of the second pivoting means 12 are set based on the conditions of the predetermined interval L1 and the predetermined interval L2, as in the illustrated embodiment. It is preferable to arrange and connect the bracket 15 or the left and right frames 9 to each other, but the interlocking mechanism 17 of the floor top plate 5 which is the object of the present invention has both legs supported by the pivot means 4 different from such an opening / closing mechanism. The present invention can also be applied to a stepped work table in which the bodies 2 and 3 are pivoted.

In the case of the illustrated embodiment, the interlocking mechanism 17 of the floor top plate 5 shows an example in which the floor top plate 5 that maintains the horizontal posture when the legs are opened is turned downward when the legs are closed, but is turned upward from the horizontal posture. In this case, the pivot bracket 20 constituting the pivot attachment means 18 may be extended upward from the base end portion of the floor top plate 5, and the second locking means 30 may be What is necessary is just to provide in the upper position of the 1st leg 2.

Further, the guide means 25 and the shaft means 26 are configured opposite to those in the illustrated embodiment, the shaft means 26 are provided on both sides of the front end portion of the floor top plate 5, and the guide means 25 is provided on the support 3a of the second leg 3. You may provide along 3a.

Further, the shaft means 26 composed of the guide pins 26a is disposed at the intersection of the column 3a of the second leg 3 and the floor top plate 5 as in the illustrated embodiment, and is provided at a position away from the intersection via a bracket or the like. May be.

DESCRIPTION OF SYMBOLS 1 Stepladder type work platform 2 1st leg 2A Elevating leg 2a Strut 2b Extension strut part 3 2nd leg 3A Non elevating leg 3a Strut 3b Extension strut part 4 Pivoting means 5 Floor top board 6 Frame 7 Step bar 8 Connecting bar 9 Left and right frame 10 Crossing frame 11 First pivoting means 12 Second pivoting means 13, 14 Bearing bracket 15 Bracket 16 Link arm 17 Linking mechanism 18 Pivoting means 19 Moving coupling means 20 Pivoting bracket 21 Pivoting bracket 22 Pivot 23 Recess 24 Pin 25 Guide means 25a Guide groove 26 Shaft means 26a Guide pin 27 Support bracket 27a Guide surface 28 Lock means 29 First lock means 29a Lock hole 30 Second lock means 30a Lock hole 31 Rod 31a Stop projection 31b Operation unit 32 Support means 33 Spring 34 Projection piece 34a Guide surface

Claims (3)

In a stepladder-type work table in which a first leg and a second leg each provided with support posts on the right and left are pivotably connected to each other, and a work space is formed above the floor top plate installed on both legs.
Provided with an interlocking mechanism (17) for changing the posture of the floor top plate (5) between the horizontal posture and the vertical posture in conjunction with the opening and closing leg operations of the both legs (2) and (3),
The interlock mechanism (17) includes a pivoting means (18) pivotably pivoting the base end of the floor top plate (5) and the first leg (2) around the horizontal axis, and the floor. It constitutes moving connecting means (19) for connecting the top plate (5) and the second leg (3) movably to each other
The moving connection means (19) includes a shaft means (26) provided on one of the floor top plate (5) and the second leg (3), and a guide means (25) provided on the other, The shaft means (26) is moved along the guide means (25) following the change in the crossing angle between (5) and the second leg (3),
The shaft means (26) and the guide means (25), when the legs (2) (3) are opened, by moving the shaft means (26) toward one end of the guide means (25), When the floor top plate (5) is turned to the horizontal position and both legs (2) and (3) are closed, the shaft means (26) is moved toward the other end of the guide means (25). The floor top plate (5) is configured to rotate toward a vertical orientation,
The pivot means (18) is pivotally attached to the first leg (2) at the distal end of a pivot bracket (20) projecting from the base end of the floor top plate in either of the vertical directions. When the legs (2) and (3) are closed, the floor top plate (5) is placed in a vertical orientation on the radius of rotation of the pivot bracket (20). A stepladder-type work table configured to be stored between the left and right support columns (3a, 3a) of the second leg (3) . Locking means (28) is provided at the tip of the floor top plate (5),
The floor top plate (5) is provided with first locking means (29) on the second leg (3) for releasably locking the locking means (28) when the floor top plate (5) is in a horizontal posture. The first leg (2) is provided with second locking means (30) for detachably locking the locking means (28) when the plate (5) is in the vertical orientation. The stepladder type workbench according to claim 1 . In the open leg state, the right and left columns (2a, 2a) (3a, 3a) of the first leg (2) and the second leg (3) are extended above the floor top plate (5) to extend the column ( 2b, 2b) (3b, 3b) are formed, a frame body (6) provided with left and right frames (9) and an intersecting frame (10) surrounding at least three sides of the working space is provided on the extension column part, and The upper end of the extension pillars (2b) and (3b) facing each other between the one leg (2) and the second leg (3) and the left and right frames (9) of the frame (6) are pivoted to each other. A first pivoting means (11) and a second pivoting means (12) to be worn ;
In a state where the right and left frame (9) and a horizontal position, the first pivot connection pivot position of the means (11) (P1) and the pivot position of the second pivot connection means (12) (P2), the lateral right and left frame The first pivoting means (11) is separated from the second pivoting means (12) by a predetermined distance (L1) with respect to the extending direction and spaced apart by a predetermined distance (L2) with respect to the vertical direction. Is located below the pivot position (P2) of
When the first pivoting means (11) is lifted together with the one leg (2) from the open leg state, the first pivoting means (11) pushes up the left and right frames (9), so that the frame (6 claims, characterized by comprising constitute the two legs (2) (3) to閉脚in the folded state in parallel right and left frame (9) a pair of extension pole portion (2b) (3b) of) The stepladder-type workbench according to 1 or 2 .

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