JP6255185B2 - Stepladder platform - Google Patents

Description

The present invention relates to a stepladder-type workbench that ensures the safety of an operator and can easily open and close 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. A work space is formed by extending an extension pillar portion of the column above the floor top plate, and includes a left and right frame and an intersecting frame surrounding at least three sides of the work space on the extension column portion Have a body.

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, since the work space is surrounded by the frame body, 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 that pivotally attaches the upper ends of the first and second legs, and is used with both legs spread downward. When the work is finished, the legs are transported and stored in a compact state with the legs closed in parallel.

By the way, the above-mentioned frame body secures work safety by adopting a horizontal posture in a used state in which the legs are opened. On the other hand, in a non-use state in which the legs are closed, the frame is made compact by adopting a vertical posture parallel to both legs. It is desirable to be configured to be folded.

However, when the frame folding mechanism and the opening / closing mechanism by the pivoting means of the both legs are configured separately, when closing the legs, the work of closing both legs and the frame from the horizontal position to the vertical position are performed. Two operations of changing the posture are required, and similarly, when opening the legs, two operations of opening both legs and changing the posture of the frame body from a vertical posture to a horizontal posture are necessary. It is.

The present invention provides a stepladder-type workbench that solves the above-described problems, and is configured as a means for the first leg body and the second leg body that are respectively provided with columns on the left and right sides. It is pivotably connected via a pivoting means, a floor top plate is installed on both legs, and a work space is formed by extending an extension column portion of the column above the floor top plate, and the extension In a stepladder-type workbench comprising a pillar portion provided with a left and right frame surrounding at least three sides of the work space and a frame body having an intersecting frame, extension pillars facing each other between the first leg body and the second leg body The part constitutes a pair of rotating column parts arranged at a distance from each other, and the first pivoting means and the second pivoting unit pivotally attach the pair of rotating column parts and the left and right frames of the frame body to each other. The pivot means is provided, and the pivot position of the first pivot means and the pivot position of the second pivot means are the left In a state in which the frame is in the horizontal orientation, the left and right frames are spaced apart from each other at a predetermined interval, and the vertical position of the first pivot means is greater than the pivot position of the second pivot means in the vertical direction. When one leg is lifted from the open leg state, the first pivot means pushes up the left and right frames, and the left and right frames are moved to the rotating column part of the other leg. In addition , the legs are configured to be closed with the pair of rotating columns folded in parallel through the predetermined distance .

In a preferred embodiment of the present invention, the first leg constitutes an elevating leg in which left and right struts are connected by a treadle, and the second leg constitutes a non-elevating leg in which left and right struts are connected by a connecting bar. The operator is configured to move up and down from the lifting leg to the working space, and the first pivoting means is provided between the rotating column portion of the column and the left and right frames constituting the lifting leg, and the second The pivoting means is provided between the rotating column part of the column constituting the non-lifting leg and the left and right frames, and when the lifting leg is lifted from the open leg state, the first pivoting means pushes up the left and right frames. The left and right frames of the frame body and the pair of rotating column portions are folded in parallel so that both legs are closed.

The first pivoting means pivots the distal end of the arm bracket extending from the left and right frames toward the pivot post and the pivot post, and the second pivot means rotates with the outer surface of the left and right frames. It is preferable that the inner side surfaces of the moving column part are pivotally connected to each other, so that when the left and right frames of the frame body and the pair of rotating column parts are folded in parallel, the left and right frames are the rotating columns of the columns in the non-elevating legs. It can be configured to be stored inside the unit.

The floor top plate is pivotally attached to one strut of the struts facing each other between the first leg and the second leg via a pivoting means, and is folded to the other strut via a slide mechanism. It is preferable to configure freely.

At this time, the slide mechanism is configured such that a guide pin protruding from the inside of the support column is slidably inserted into a guide groove extending on the side surface of the floor top plate so that the support column and the floor top plate can move freely. It is preferable that the floor top plate is rotated in conjunction with the closed legs and the open legs of both legs.

According to the first aspect of the present invention, when the legs 2 and 3 are closed from the open leg state, the first pivoting means 11 pushes up the left and right frames 9 only by lifting one leg 2. Thus, the left and right frames 9 of the frame body 6 can be folded so as to be parallel to one of the rotating column portions 3c, and the rotating column portions 2c, 3c of both legs 2, 3 can be closed in a folded state. has the advantage of allowing, on the contrary, when the open leg of the two legs 2, 3 from閉脚state, only pulling one leg 2, by first pivot connection means 11 to lower the left and right frame 9 The left and right frames 9 of the frame 6 can be placed in a horizontal posture and the legs 2 and 3 can be opened. Therefore, since the closed and opened legs and the frame 6 are folded and unfolded simultaneously by the one-touch operation, the operation becomes simple and easy.

According to the second aspect of the present invention, since the first leg 2 that the operator performs the lifting or lowering operation is configured by the elevating leg 2A, the operator is required to open the leg operation position when opening the leg. From the work space, the operator can immediately go up to the work space, and after the worker descends from the work space to the ground, the work can be immediately performed at that position.

According to the third aspect of the present invention, when the left and right frames 9 of the frame 6 and the rotating column portions 2c and 3c are folded so as to be in a parallel posture, the left and right frames 9 are not lifted / lowered legs 3A (second legs). Since it is stored inside the body 3), a compact closed leg state is obtained.

According to the present invention described in claim 4 and claim 5, the floor top plate 5 is folded simultaneously with the closed legs of both legs 2 and 3, and the floor top plate 5 can be used simultaneously with the opened legs of both legs 2 and 3. Therefore, it is possible to maximize the effect of the present invention that the leg closing operation and the leg opening operation can be easily and easily performed with one touch.

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 the action of the pivoting column part of the extension column part and the pivoting means of the frame body in the leg column are shown, (A) is a side view showing the state of the pivoting means when the legs are opened, (B ) Is a side view showing the state of the pivoting means when the leg is closed. It is a perspective view shown in the state which decomposed | disassembled one example of the pivot means and slide mechanism between a floor top plate and both legs. The structure and operation of the pivoting means and the sliding means of the floor top plate are shown, (A) is a sectional view showing a state when the legs are opened, (B) is a sectional view taken along the line AA, and (C) is a closed leg. It is sectional drawing which shows a state when it did. 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. It is a side view which shows the open leg state of the stepladder type work bench | platform which concerns on another embodiment of this invention. The structure and effect | action of the pivoting means in another embodiment of this invention are shown, (A) is a side view which shows the state of the pivoting means when the leg is opened, (B) is the pivoting means when the leg is closed. It is a side view which shows the state.

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.

The two legs 2 and 3 extend above the floor top plate 5 by extending extension column portions 2b, 2b and 3b and 3b extending from the respective columns 2a, 2a and 3a and 3a above the floor top plate 5. Form a work space.

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. 2, a pair of rotating column portions 2c and 3c arranged at intervals in the axial direction of the left and right frames 9 are configured, and the pair of rotating column portions 2c and 3c and the left and right frames of the frame body 6 are configured. 9 is pivoted to each other by the first pivoting means 11 and the second pivoting means 12 to constitute the pivoting means 4 . On this occasion,
The pivot position P1 of the first pivoting means 11 and the pivot position P2 of the second pivoting means 12 are the lateral extension of the left and right frames in a state where the left and right frames 9 are in the lateral orientation as shown in FIG. In the vertical direction, the pivot position P2 of the first pivoting means 11 is lower than the pivot position P2 of the second pivoting means 12 by a predetermined distance L2 with respect to the vertical direction. It is arranged.

In the case of the illustrated embodiment, the left and right frames 9 are arranged so as to face the inner sides of the rotating column portions 2c and 3c. As shown in the figure, the rotating column part 2c of the first leg 2 is formed to be shorter than the rotating column part 3c of the second leg 3 corresponding to the predetermined distance L2, thereby The upper end of the rotating column part 2c is positioned lower than the upper end of the rotating column part 3c, and the first pivoting means 11 and the second pivoting means 12 are arranged at the upper ends of the respective rotating column parts 2c and 3c. The bearing brackets 13 and 14 constituting the are fixed.

The first pivoting means 11 includes an arm bracket 15 that extends from the left and right frames 9 toward the rotating column portion 2 c, and a tip end portion of the arm bracket 15 is pivotally attached to the inner side surface of the bearing bracket 13. .

The second pivoting means 12 pivotally attaches the outer side surfaces of the left and right frames 9 and the inner side surface of the rotating column part 3 c to each other via the bearing bracket 14.

As a result of the above configuration, when the first leg 2 is lifted from the state where both legs 2 and 3 are opened as shown in FIG. 3A, the rotating column 2c extending to the extension column 2b is formed. Since the left and right frames 9 are pushed up via the first pivoting means 11, the left and right frames 9 are rotated with the second pivoting means 12 as a fulcrum, and as a result, as shown in FIG. In a state in which 3 is closed, the left and right frames 9 are folded so as to be parallel to one rotating column portion 3c, and the pair of rotating column portions 2c, 3c are parallel to each other via the predetermined distance L2. It is folded so that it becomes a vertical posture.

At this time, the left and right frames 9 are positioned inside the rotating column portion 3c of the second leg 3, and the pivot P2 of the second connecting means 12 is set to the center axis of the left and right frames 9 and the center of the rotating column portion 3c. Since it is provided so as to be located at the intersection of the axis lines, as shown in FIG. 3 (B), the left and right frames 9 are overlapped with the inside of the rotating column portion 3c of the second leg 3 and are fitted inside. Folds compactly.

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 operability and the work of lifting the first leg 2 up to the closed leg, the extension struts 2b and 3b facing each other between the legs 2 and 3 are rotated. A link arm 16 that is movably connected is provided (see FIGS. 1 and 2).

The floor top plate 5 installed on both the legs 2 and 3 is pivotally attached to the columns 2 a and 2 a of the first leg 2 via pivot means 17 at the base end. In the present invention, the free end of the floor top plate 5 may be configured to be detachable from the second leg 3, but in the illustrated embodiment, a slide mechanism 18 is provided.

As shown in FIGS. 4 and 5, the pivot attachment means 17 extends a pivot bracket 19 downward from the base end portion of the floor top plate 5, and the pivot bracket 19 is attached to the column of the first leg 2. It is pivotally attached to the pivot bracket 20 fixed inside 2a. In this case, the pivot bracket 19 and the pivot bracket 20 are provided with a concave portion 21 and a pin 22 that form concave and convex portions that are fitted when the floor top plate 5 is in a horizontal posture.

The slide mechanism 18 includes a guide groove 23 formed of a slit extending along the side surface of the floor top plate 5 and a guide pin 24 slidably inserted into the guide groove 23. It protrudes from the support support bracket 25 fixed inside the support | pillar 3a of the 2nd leg 3, and, thereby, the movable intersection of the support | pillar 3a and the floor top board 5 is comprised.

Therefore, when the legs are closed while lifting the first leg 2 as described above from the state where the legs 2 and 3 are opened as shown in FIG. 5 (A), the relative positions as shown in FIG. 5 (C) are obtained. In addition, since the first leg 2 moves upward and the second leg 3 moves downward while the distance between the first leg 2 and the pin 22 is separated, the mating is released and the floor top plate 5 is released. Is allowed to rotate in the direction in which the free end portion is directed downward via the pivot attachment means 17, and at the same time, the guide pin 24 of the slide mechanism 18 is directed toward the proximal end portion of the floor top plate 5 along the guide groove 23. By sliding and sliding, the floor top 5 is rotated in conjunction with the closed legs of both legs 2 and 3. When the legs 2 and 3 are completely closed, the floor top plate 5 overlaps the inside of the support 3a of the second leg 3 and is compactly folded.

FIG. 6 shows an operation procedure and action for closing the stepped work table 1 configured as described above from the open leg state. When performing the leg closing operation from the open leg state shown in FIG. 6 (A), first, as shown in FIG. 6 (B), the first leg 2 is lifted. As a result, the second leg 3 maintains an upright posture, and in this state, the first pivoting means 11 of the left and right frames 9 of the frame body 6 is lifted as described above, and the second leg body 3 starts rotating. The top plate 5 starts to rotate when the guide pin 24 slides. Further, when the first leg 2 is moved upward as shown in FIG. 6C, the legs 2 and 3 are closed so as to be in a parallel posture as described above, and the frame 6 is moved to the second leg. It is stored between the columns 3a and 3a of the body 3, and the floor top plate 5 is stored between the columns 3a and 3a of the second leg 3, so that a compact folded state as shown in FIG. 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.

Accordingly, when the legged work table 1 is closed from the open leg state, the first leg body 2 may be simply lifted, and conversely, when the leg is opened from the closed leg state, the first leg body 2 is simply lifted. It is only necessary to pull it down, and any work can be easily and easily performed with one touch.

At this time, since the first leg 2 on which the operator performs the lifting or lowering operation constitutes the lifting leg 2A as described above, the work is further simplified. 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]
7 and 8 show another embodiment of the present invention. In this embodiment, the floor top plate 5 is pivotally attached at both ends to the support 2a of the first leg 2 and the support 3a of the second leg 3 via pivot means 17a and 17b, respectively. Therefore, since the slide mechanism as in the above embodiment is not provided, when the first leg 2 is lifted, the floor top 5 is directed upward with respect to the second leg 3 as shown by a chain line in FIG. It is lifted together with the first leg 2 while rotating.

The first pivoting means 11 and the second pivoting means 12 that pivotally connect the left and right frames 9 and the pivot shafts 2c and 3c of the frame 6 have a predetermined interval L1 and a predetermined length L2, as in the above embodiment. Although arranged under the conditions, a predetermined interval L1 defined when both legs 2, 3 are opened is configured to extend when both legs 2, 3 are closed. For this reason, a pivot movement means 26 is provided at a pivot position P2 composed of a long hole or the like provided along the left and right frames 9.

Therefore, according to this embodiment, when the first leg 2 is lifted from the open leg state shown in FIG. 8 (A), the floor top plate 5 rotates upward with respect to the second leg 3 as described above. While being lifted together with the first leg 2, the rotating column part 2 c of the first leg 2 pushes up the left and right frames 9 via the first pivoting means 11. At this time, the left and right frames 9 move the second pivoting means 12 of the rotating column portion 3c of the second leg 3 through the pivot moving means 26 while moving the distance as shown in FIG. It is pushed upward while widening L so as to be the interval L1 + E.

As a result, the left and right frames 9 rotate with the second pivoting means 12 as a fulcrum and are lifted by the pivotal movement means 26, whereby the legs 2, 3 are closed as shown in FIG. 8B. Then, the left and right frames 9 and the pair of rotating column portions 2c and 3c are folded so as to have a vertical posture parallel to each other. And the floor top plate 5 is folded between the extension support | pillar parts 2b and 3b of both the leg bodies 2 and 3. FIG.

DESCRIPTION OF SYMBOLS 1 Stepladder type work platform 2 1st leg 2A Elevating leg 2a Post 2b Extension post part 2c Rotating column part 3 Second leg 3A Non-elevating leg 3a Post 3b Extension post part 3c Rotating column part 4 Pivoting means 5 Floor top plate 6 Frame 7 Step bar 8 Connecting bar 9 Left and right frame 10 Cross frame 11 First pivoting means 12 Second pivoting means 13 and 14 Bearing bracket 15 Arm bracket 16 Link arm 17 Pivoting means 18 Slide mechanism 19 Pivot Support bracket 20 Axle support bracket 21 Recess 22 Pin 23 Guide groove 24 Guide pin 25 Support bracket 26 Axis moving means

Claims (5)

A first leg and a second leg, each provided with a support on the left and right, are pivotably connected to each other via an upper pivoting means, and a floor top plate is installed on both legs and above the floor top plate. A work space is formed by extending an extension column portion of the support column, and the extension column portion is provided with a frame body including left and right frames and an intersecting frame surrounding at least three sides of the work space. On the table,
The extension pillars (2b) and (3b) facing each other between the first leg (2) and the second leg (3) have a pair of rotating pillars (2c) spaced apart from each other. ) (3c), and a first pivoting means (11) and a first pivoting means (11) for pivotally attaching the pair of rotating columns (2c) (3c) and the left and right frames (9) of the frame (6) to each other Two pivoting means (12) are provided,
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 a horizontal posture, The lateral extension direction is spaced apart by a predetermined interval (L1), and the vertical position (P1) of the first pivot means (11) is changed to the pivot position (P2) of the second pivot means (12) with respect to the vertical direction. Is arranged below with a predetermined distance (L2),
When one leg (2) is lifted from the open leg state, the first pivot means (11) pushes up the left and right frames (9) so that the left and right frames (9) are rotated by the other leg (3). The legs (2) and (3) are closed with the pair of rotating columns (2c) and (3c) folded in parallel through the predetermined distance (L2) in parallel with the moving column (3c). A stepladder-type workbench characterized by being configured as described above. The first leg (2) constitutes a lifting leg (2A) in which the left and right struts are connected by a treadle, and the second leg (3) is a non-elevating leg (3A) in which the left and right struts are connected by a connecting bar. ) And a stepladder-type workbench configured to allow the operator to move up and down from the lifting leg (2A) to the working space,
The first pivoting means (11) is provided between the rotating column part (2c) of the column constituting the elevating leg (2A) and the left and right frames (9), and the second pivoting means (12) , Provided between the rotating column part (3c) and the left and right frame (9) of the column that constitutes the non-elevating leg (3A),
When the lifting leg (2A) is lifted from the open state, the first pivot means (11) pushes up the left and right frames (9), so that the left and right frames (9) of the frame (6) and a pair of rotating pillars 2. The stepladder-type workbench according to claim 1, wherein the two legs (2) and (3) are closed with the two (2c) and (3c) folded in parallel. The first pivoting means (11) pivotally connects the tip of the arm bracket (15) extending from the left and right frames (9) toward the pivot post (2c) and the pivot post (2c). ,
The second pivoting means (12) pivotally connects the outer side surface of the left and right frame (9) and the inner side surface of the rotating column part (3c),
When the left and right frames (9) of the frame (6) and the pair of rotating columns (2c) (3c) are folded in parallel, the left and right frames (9) are the rotating columns of the columns in the non-elevating legs (3A). (3c) The stepladder-type workbench according to claim 2, which is configured to be stored inside (3c). The floor top plate (5) is pivotally attached to one strut (2a) of the struts facing each other between the first leg (2) and the second leg (3) via a pivot means (17). The stepladder-type workbench according to claim 1, 2 or 3, characterized in that the other support post (3a) is configured to be foldable via a slide mechanism (18). The slide mechanism (18) is slidably inserted into a guide groove (23) extending from the side surface of the floor top plate (5), with a guide pin (24) protruding from the inside of the column (3a). And a movable intersection of the column (3a) and the floor top plate (5), and the floor top plate (5) is rotated in conjunction with the closed legs and open legs of both legs (2) (3). The stepladder-type workbench according to claim 4, wherein the stepladder-type workbench is configured as follows.

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