JP5581476B2 - Lifting type moving scaffold - Google Patents

Description

  The present invention relates to an elevating mobile scaffold used for high-altitude work, and is mainly used for high-altitude work during construction of buildings and structures, so that the high-altitude work can be performed very safely with little shaking.

  When constructing a building or a structure, a lifting platform for raising and lowering a work stage is used as a work scaffold used for working at a high place. A table lift type work scaffold (FIGS. 11 (a) to (c)). In general, a multistage work scaffold using a single column or a tower having a multistage structure is generally known (see FIGS. 12A and 12B).

  In these figures, reference numeral 24 is a working stage, 25 is a lifting device having a pantograph structure, 26 is a single column having a multistage structure, and 27 is a traveling carriage.

  In these cases, the working stage is directly connected to a part of the lifting device such as a pantograph or a column, and the height and position are maintained only by the lifting device, so the safety of the working stage depends on the reliability of the lifting device. Met. Further, the work stage is fixed by being directly connected to the lifting device or directly connected to the lifting device via a guide such as a column.

JP 2003-027740 A JP 2008-174903 A JP-A-10-2199993

  However, the table lift type has a problem that since the work stage is held only by scissors and there is no other support portion, the work stage stage is greatly shaken, which causes anxiety to the operator.

  In addition, since the work stage is fixed and held only by scissors, the safety for fixing the position is often limited to the scissors' operating mechanism, and some of them are pantographs that support a fixed position with a support bar. However, since one pitch of the pantograph is one step, there is a problem that only a few steps of height adjustment can be performed.

  On the other hand, in the case of a multi-stage type, a single support is mainly used, and the support serves as both a guide and a support, and the work stage is lifted by electric or hydraulic, and the support is not fixed. In addition, there is a problem that the positioning is only a stop in the lifting device.

  The present invention has been made to solve the above-described problems, and provides an elevating moving scaffold that is stable in strength, has little shaking of the work stage, and can perform work at heights extremely safely. With the goal.

The lifting type mobile scaffold according to claim 1 is composed of a working stage, a lifting device that lifts and lowers the working stage, a column that holds the working stage at a set height , and a traveling carriage on which these are mounted. In the lifting and lowering type moving scaffold, the pillar is directly connected to the traveling carriage, a lower pillar that slides in the lower pillar in the vertical direction, and an upper pillar that slides in the vertical direction in the middle pillar. It is configured in a multistage manner that can extend and contract in the vertical direction from the pillar, and a plurality of clamp hooks are built in the middle pillar and the upper pillar, respectively, spaced in the vertical direction of the middle pillar and the upper pillar, and the upper end of the lower pillar One of the clamp hooks built in the middle pillar is provided on the side part so that it can jump out and be accommodated, and one of the clamp hooks built in the upper pillar projects on the upper end side of the middle pillar and Retractable clamp The lower pillar and the middle pillar, and the middle pillar and the upper pillar are fastened to the upper end side part of the lower pillar and the upper edge part of the middle pillar by fastening one of the clamp hooks protruding out of the clamp window, respectively. Each of them is provided with a clamp for coupling .

  The present invention is provided with a column for holding the work stage at a set position (height) separately from the lifting device for raising and lowering the work stage in particular, thereby preventing the work stage from shaking during work. It is designed to allow safe work at heights. In particular, by holding the work stage at the set height by the support column, it is possible to drastically reduce the shaking of the work stage due to insufficient rigidity of the lifting device itself.

  In addition, although an electric actuator, an electric chain, or a hydraulic cylinder can be used for the lifting device that lifts and lowers the work stage, a table lift type lifting device with a pantograph structure as a simple device for synchronizing a plurality of support columns Etc. can also be used.

Further, the middle column can be fixed to the lower column and the upper column can be fixed to the lower column at arbitrary positions. Furthermore, as an apparatus for fixing the middle column to the lower column and the upper column to the lower column in arbitrary positions, as shown in FIG. 6, for example, a clamp configured to be automatically housed in the column As an apparatus or a very simple and clear structure, it is possible to use a coupling pin or the like that passes through a pin hole provided in each of the upper column and the middle column, and the middle column and the upper column at the coupling portion between the columns.

  In particular, the clamping device as shown in FIG. 6 is configured so that the clamp hook is housed in the pillar regardless of whether the middle pillar or the upper pillar slides in the vertical direction. In the middle pillar, the middle pillar can be stored in the lower pillar, respectively, so that the upper pillar and the middle pillar can be slid to freely expand and contract, and the middle pillar as the lower pillar, The upper column can be fixed to the lower column in arbitrary positions step by step.

  In addition, by tightening the clamp hook firmly with the clamp, the middle column is firmly connected to the lower column and the upper column is firmly coupled to the middle column, thereby ensuring the positioning and safety of the work stage, which makes it difficult for workers at high places. The feeling of the working stage that you feel can be drastically reduced.

Elevating movement scaffold according to claim 2, wherein, in the elevating movement scaffold of claim 1, wherein, the lifting device is characterized in that a lifting device of the table lift type according pantograph structure.

  A table lift type lifting device having a pantograph structure is a simple lifting device, and can reduce production costs.

  The present invention is provided with a support column for holding the stage for working at high places in a set position (height) separately from the lifting device for raising and lowering the stage for working at high places. It is possible to drastically reduce the shaking and to work at heights very safely.

  In particular, by holding the work stage at the set height by the support column, it is possible to prevent the work stage from shaking due to insufficient rigidity of the lifting device itself. Further, by using a table lift type lifting device having a pantograph structure as a lifting device that lifts and lowers the work stage, it is possible to reduce production costs and the like.

It is a perspective view which shows one Embodiment of a raising / lowering type mobile scaffold, and shows the state which the working stage raised. It is a perspective view which shows one Embodiment of a raising / lowering type mobile scaffold, and shows the state in which the work stage was accommodated. It is a top view of a raising / lowering type mobile scaffold. Clamp hooks, hook guides and springs built in the middle pillar and the upper pillar together with the hook base are shown, (a) is a perspective view showing one set thereof, (b) is a perspective view showing a state incorporated in the hook base. is there. It is a perspective view which shows the stepping step attached to the support | pillar which connects the upper stage and the middle stage for work directly. The joint part of the lower pillar and middle pillar which hold | maintain a work stage at setting height is shown, (a) is a perspective view which shows the state before a lower pillar and middle pillar are joined, (b) is a lower pillar It is a perspective view which shows the state after the middle pillar was combined. It is a cross-sectional view showing a state in which a column for holding a work stage at a set height is shown, an upper column is stored in a middle column, and a middle column and an upper column are stored in a lower column. The operation of the column that holds the work stage at the set height is shown. (A) shows the state where the middle column slides up and down in the lower column, (b) shows the upper column sliding in the up and down direction in the middle column. It is a cross-sectional view which shows the state which each moves. The operation of the column that holds the work stage at the set height is shown. (A) shows the state where the middle column is coupled to the lower column, and (b) shows the state where the upper column is coupled to the middle column. FIG. (A) is a longitudinal sectional view showing a state in which the middle column slides in the lower column and the upper column slides in the middle column in the vertical direction. b) is a longitudinal sectional view showing a state in which the middle column is coupled to the lower column and the upper column is coupled to the middle column. (a), (b), (c) is a front view which shows the prior art example of the table lift type raising / lowering type moving scaffold of a pantograph structure. The prior art example of the multistage type raising / lowering moving scaffold by the single pillar of a multistage structure is shown, (a) is a front view, (b) is a side view.

  1 to 10 show an embodiment of the present invention. In the figure, an elevating mobile scaffold 1 includes an upper work stage 2, an elevating device 3 for elevating and lowering the work stage 2, and a work stage 2. The support column 4 is held at a height, and a traveling carriage 5 on which these columns are mounted is provided.

  The work stage 2 is supported on the traveling carriage 5 at the four corners by the support columns 4, and handrails 6 and hatches 7 are provided around the work stage 2 and on the floor, respectively.

  The elevating device 3 is a table lift type having a pantograph structure, and includes a scissors 8 that expands and contracts in the vertical direction by a manual hydraulic jack (not shown), and a middle work stage 9 that is installed at the upper end of the scissors 8. The upper work stage 2 and the scissors 8 are directly connected to the work stage 9, and the inner ladder 10 and the lifting column 11 are used to go back and forth between the middle work stage 9 and the upper work stage 2. And a step 11a is attached to the lifting column 11.

  The pillars 4 are respectively built at positions that support the four corners of the work stage 2, and the lower pillars 4 a and the middle pillars 4 b and the middle pillars that slide directly in the lower pillars 4 a and the lower pillars 4 a directly connected to the traveling carriage 5. The upper column 4c that slides in the vertical direction within 4b is configured in a multistage manner that can expand and contract in the vertical direction.

  A clamp hook 12, a hook guide 13, a spring 14 and a spring 15 are incorporated in each middle pillar 4 b and each upper pillar 4 c, respectively. Further, hook windows 4d are respectively provided on the side portions of the middle pillar 4b and the upper pillar 4c in which they are built.

  The clamp hook 12, the hook guide 13, the spring 14 and the spring 15 are each provided to constitute a pair of hook units 16 (see FIG. 4B), and the hook unit 16 is attached to the hook base 17 in the longitudinal direction. A plurality of sets are incorporated at regular intervals (in the longitudinal direction of the middle column 4b and the upper column 4c) (see FIG. 4A), and are incorporated in the middle column 4b and the upper column 4c together with the hook base 17, respectively. .

  The clamp hook 12 is given a rotational force that rotates in the direction of the arrow A about the mounting pin 12a so that it jumps out of the hook window 4d provided on the sides of the middle column 4b and the upper column 4c by the spring 14, respectively. .

  Further, the hook guide 13 is given a rotational force that rotates in the direction of the arrow B around the mounting pin 13a so that it does not jump out of the hook window 4d provided on the sides of the middle column 4a and the upper column 4c by the spring 15. Has been.

  Further, the hook guide 13 gives a rotational force so that the hook clamp 12 is rotated in the direction opposite to the direction of the arrow B through projecting pieces 13b and 12b projecting from the hook guide 13 and the clamp hook 12, respectively. ing.

  However, since the rotational force of the hook clamp 12 in the direction of arrow A by the spring 14 is larger than the rotational force of the hook guide 13 in the direction of arrow B, both the hook guide 12 and the hook guide 13 located in the hook window 4c are It protrudes from the hook window 4c.

  A clamp window 18 from which the clamp hook 12 and the hook guide 13 jump out and a clamp 19 for fastening the clamp hook 12 jumped out from the clamp window 18 are attached to the upper ends of the lower pillar 4a and the middle pillar 4b, respectively.

  In such a configuration, when the hydraulic jack of the lifting device 3 is operated to expand and contract the scissors 8 in the vertical direction, the upper work stage 2 directly connected to the scissors 8 via the inner ladder 10 and the lifting column 11 The middle work stage 9 moves up and down.

  At the same time, the column 4 expands and contracts as the middle column 4b slides in the lower column 4a of the column 4 and the upper column 4c slides in the column 4b. At that time, the clamp hook 12 and the hook guide 13 incorporated in the middle column 4b and the upper column 4c are pressed against the inner walls of the lower column 4a and the middle column 4b, respectively, and remain incorporated in the middle column 4b and the upper column 4c. Go up and down.

  Then, the clamp hook 12 and the hook guide 13 that have reached the position of the clamp window 18 are rotated about the mounting pins 12a and 13a by the rotational force applied by the spring 14, respectively, and jump out of the clamp window 18.

  When the elevating device 3 is operated and the scissors 8 are further expanded and contracted in the vertical direction, the clamp hooks 12 that have jumped out of the clamp windows 18 of the lower pillar 4a and the middle pillar 4b respectively enter the middle pillar 4b and the upper pillar 4c again. Stored.

  In this case, when the scissors 8 are extended upward, the clamp hooks 12 that have jumped out of the clamp windows 18 of the lower pillar 4a and the middle pillar 4b are clamped by the hook guides 13 that have jumped out of the clamp window 18 together with the clamps 12. The clamp hook 12 is housed in the middle column 4b and the upper column 4c by hitting the upper end portion 18a of the window 18 and further rotating in the direction indicated by the arrow B by the spring 15 to rotate the clamp hook 12 in the direction opposite to the arrow B direction. Is done.

  On the other hand, when the scissors 8 are contracted downward, the clamp hook 12 is rotated in the direction indicated by the arrow 15 by the spring 15 and the clamp hook 12 is rotated in the direction opposite to the direction indicated by the arrow A. It is accommodated in the pillar 4b and the upper pillar 4c, respectively.

  Further, when the clamp ring 19a of the clamp 19 is hooked on the tip of the clamp hook 12 protruding out of the clamp window 18 and the clamp lever 19b is tightened, the lower column 4a and the middle column 4b, and the middle column 4b and the upper column 4c are respectively connected. Can be combined. Thereby, the work stage 2 can be fixed and held at the set height.

  Reference numeral 20 denotes a hydraulic jack operating lever for extending and lowering the scissors 8 to raise and lower the upper work stage, and 21 is an outer ladder for ascending and descending to the middle stage installed at the upper end of the scissors 8. .

  Reference numeral 22 denotes a caster, and reference numeral 23 denotes an outrigger. The outrigger 23 is attached so as to be retractable as shown in FIG.

  According to the present invention, the working stage is extremely less shaken, and the work at a high place can be performed extremely safely.

DESCRIPTION OF SYMBOLS 1 Lifting type moving scaffold 2 Upper work stage 3 Lifting device 4 Post 4a Lower post 4b Middle post 4c Upper post 4d Hook window 5 Carriage 6 Handrail 7 Hatch 8 Scissors 9 Suspended work stage 10 Inner ladder 11 Elevating post 11a Footing step 12 Clamp hook 12a Mounting pin 12b Projection piece 13 Hook guide 13a Installation pin 13b Projection piece 14 Spring 15 Spring 16 Hook unit 17 Hook base 18 Opening 19 Clamp 19a Clamp ring 19b Clamp lever 20 Hydraulic jack operation lever 21 Outside Ladder 22 Caster 23 Outrigger

Claims (2)

In the lifting and lowering movable scaffold comprising: a working stage; a lifting device that lifts and lowers the working stage; a column that holds the working stage at a set height; and a traveling carriage that includes these columns. Is a multi-stage type that can be vertically expanded and contracted from a lower column directly connected to the traveling carriage, a middle column that slides up and down in the lower column, and an upper column that slides up and down in the middle column A plurality of clamp hooks are incorporated in the middle pillar and the upper pillar at intervals in the vertical direction of the middle pillar and the upper pillar, respectively, and are incorporated in the middle pillar at the upper end side portion of the lower pillar. One of the clamp hooks is provided with a clamp window that can be protruded and stored, and one of the clamp hooks built in the upper column is provided at the upper end side of the middle column, and a clamp window that can be protruded and stored is provided, and Top of bottom pillar The part between the upper end side in said pillar, formed by the lower column and the middle column by tightening the one clamping hook jumped out of each of the clamping window, a clamp for coupling a center post and upper pillars respectively provided Lifting type moving scaffold characterized by that. 2. The lifting / lowering moving scaffold according to claim 1, wherein the lifting / lowering device is a table lift-type lifting / lowering device having a pantograph structure.

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