JP2011140357A - Wire lift - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manual wire lift provided with an automatic locking means for fall prevention and having high safety without any fall accident of a worker. <P>SOLUTION: When a first main wire 9 is slackened or broken, a stopper 12 is inclined to hold a first middle tube 15 at a circumferential edge of a passing port 13 through which the first middle tube is passed. Then, when a releasing piece 24 is forwardly tilted by operating a first release wire 25, a front end of the releasing piece taps one end of the inclined stopper to return the stopper in the horizontal position and to release the fixing relationship of the stopper to the first middle tube. The stopper immediately returns to the inclined position, and the first middle tube is again held by the circumferential edge of the passing port of the stopper. By repeating a series of these operations, the first middle tube is lowered by a small distance. By repeating this operation, the first middle tube is lowered to a second stay 5. In order to lower the second stay, the release wire continuous to the releasing piece is pulled and released by a releasing bar 34 added to an outer part of a first stay 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a safety mechanism for a wire lift.

  Conventionally, in manual type wire lifts for working at heights, cutting accidents of the wire connecting the manual winch for height adjustment and the lift body have often occurred. It was due to carelessness such as forgetting to lock the manual lock that had to be done before. However, even if this is the case, wire lifts equipped with safety devices to prevent sudden accidents such as dropping of the work table due to cutting or relaxation of other wires have been performed so far. As a result of the investigation, it has been found that it does not exist.

  The following publicly known documents are portable work benches and high-altitude work machines, and basic techniques in general terms are disclosed, but safety in manual wire lifts is disclosed. The mechanism is completely unrelated.

JP-A-8-290374 Japanese Patent No. 3356397

  Therefore, the present invention provides a manual wire lift having a manual locking means for preventing a fall as well as an automatic locking means for preventing a fall to prevent a safe and complete accident, and to incline the ladder. An object of the present invention is to provide a safer wire lift with a gentle inclination of 80 ° or less.

  In the present invention, the first support column 4 is inserted into the support column 3 provided on the movable fixed abutment 1, the second support column 5 is inserted into the first support column, and the third support column 6 is inserted into the second support column. In the wire lift in which the winding winch drum 7 for the first main wire 9 is installed on one intermediate side of the first support column, the first main wire is suspended on the intermediate sheave 10 provided on the one upper end side of the first support column. The tip end portion of the first main wire is inserted into the second support post to be inserted and lowered from the through hole 11 ′ of the stator 11, and the through hole 13 ′ of the stopper 12 that contacts and separates from the lower portion of the stator. The stopper can be tilted around the opening 13 portion of the stopper into which the first intermediate tube 15 is inserted and inserted into the second support column that is attached to the fastener 14 via the first support column. The other end of the stopper is formed on the bottom plate 17 at the bottom of the opening of the second column. The upper end of the fixed compression ammunition 16 is fixed, and the upper end of the extension ammunition 22 is fixed to one end of the bottom plate. The first release wire 25 is fixed to the other end of the release piece, and one end of the first release wire 25 is fixed to the intermediate sheave 30 provided on one side of the upper end of the second column. A second main wire 28 is suspended in parallel on the intermediate sheave, and the lower end of the second intermediate tube is fixed to the through hole 19 of the guide plate 34 provided above the stopper inside the second support column. The upper end portion of the first intermediate tube is inserted into the second intermediate tube, and a work table 41 is installed on the plurality of columns.

  First, when cutting or loosening the wire connecting the manual winch for height adjustment and the body, the current position of the column is locked by applying a brake to each middle tube supporting each column. Therefore, even if an operator is on the elevated work table, it does not fall and can be in a safe state. After that, the worker can get off immediately and operate the release lever himself to lower the workbench.

  Secondly, since the ladder can be fixed and operated at an inclination of 80 ° or less in stages, the raising and lowering of the worker is always safe.

Overall side view before moving Front view of FIG. Side view with the platform raised after movement Front sectional view of the column Front sectional view of the main part of the main wire in a normal state Front sectional view of the main part when an abnormal state of the main wire occurs Front sectional view of the main part when an abnormal state of the main wire occurs Front sectional view of the main part when the main wire returns normally Perspective view of main parts Fig. 3A-A is a cross-sectional plan view taken along line AA. Plan view of FIG. Bottom view of FIG. Front view of the main part of another example BB sectional view of FIG.

  When the first main wire is cut, the stopper inserted into the through-hole of the first middle pipe at the lower part of the second support column is pushed up to the compression ammunition below the stopper from the horizontal position in contact with the stator. The first branch pipe is sandwiched in the opening of the first middle pipe.

  That is, when the first main wire is cut, there is no means for restricting the fixed position of the stopper. Therefore, the stopper is inclined by being pressed by the compression ammunition and is located in the stopper opening portion that is inclined. The branch pipe is sandwiched from both upper and lower edges. (Fig. 5 → Fig. 6)

  Then, since the first branch pipe is sandwiched between the stoppers and stopped, the fall of the second support column is stopped.

  The above situation can be summarized as follows.

  When the first main wire is relaxed or cut, the stopper is inclined so that the periphery of the first intermediate tube is sandwiched by the peripheral edge of the opening into which the first intermediate tube is inserted. 1 Operate the release wire to tilt the release piece forward. Then, one end portion of the stopper whose front end portion of the release piece is slanted is hit to return the stopper to the horizontal position, so that the fixed relationship between the stopper and the first intermediate tube is released.

  Further, the stopper immediately returns to the inclined position, and the first inner tube is again clamped by the stopper peripheral edge of the stopper.

  By repeating this series of operations, the first intermediate tube descends slightly, and the first intermediate tube descends to the second support column by continuing this operation. (Refer to FIG. 5 to FIG. 7 for the series of operations.)

  Next, in order to descend the second support column, the release rod attached to the outer side of the first support column is used, and the release wire connected to the release piece is immediately pulled and released.

  When this release wire is pulled, the tip of the release piece moves downward about the fulcrum pin of the release piece, but since the upper end of the tension ammunition is fixed to the release piece, when the first release wire is released, The release piece returns to the original posture position.

  Since the stopper is always pressed from below by the compression ammunition, the release piece is separated from the stopper and is inclined at the same time, and the stopper opening portion sandwiches the first branch pipe.

  Since the release piece and the stopper repeat the operations of sandwiching and leaving the first intermediate tube every time the release wire is pulled, the distance to descend at one time is short. Accordingly, the release wire is repeatedly pulled until the second support column descends directly below.

  After descending the second column, the third column is lowered.

  The third support is pulled down by pulling the release wire and operating the release piece and the stopper attached to the third support.

  The third middle pipe is attached to the third support column and serves as a guide for the second middle pipe.

  The second middle pipe is attached to the second support column and slides in the third middle pipe.

  The first middle tube slides in the second middle tube.

  Reference numeral 1 denotes a rectangular abutment, and casters 2... Are provided at the four corners of the abutment. After the main body is moved to a fixed position by this caster, the stands 52... Prepared on the abutment 1 are extended and fixed in four directions, but the height can be adjusted.

  Reference numeral 3 denotes a support base that is slightly deviated from the center of the abutment 1, and this base is located away from the ground.

  Reference numeral 4 denotes a first support column erected on the support column base 3. The second support column 5 is inserted into the first support column, and the third support column 6 is inserted into the second support column 5.

  Reference numeral 7 denotes a winding winch drum for the first main wire 9 installed on an intermediate side of the first support column 4, and a handle 8 is provided on the winding winch drum.

  An intermediate sheave 10 is provided on one side of the upper end of the first support column 4, and the first main wire 9 is suspended on the sheave, and the tip end portion of the first main wire is inserted into the first support column 4. Inserted into the second support column 5 and lowered, inserted into the through hole 13 ′ of the stopper 12 through the through hole 11 ′ provided at one end of the stator 11, and then fixed to the fixing element 14. To do.

  The diameter of the through hole 11 ′ of the stator 11 and the diameter of the through hole 13 ′ of the stopper 12 are the dimensions through which the first main wire 9 is inserted, but the passage of the stopper 12 into which the first middle tube 15 is inserted later. The periphery of the diameter of the mouth 13 is formed with a margin that allows the stopper to tilt. (See Fig. 9 and Fig. 10)

  Reference numeral 15 denotes a first intermediate tube that is inserted from the first support column 4 to the central portion of the second support column 5, and the base end portion of the first intermediate tube is fixed to the support column base 3 provided at the bottom of the first support column 4.

  Reference numeral 16 denotes a compression ammunition secured to a hinge 16 ′ provided at the upper end at the other end of the stopper 12, and the lower end of the compression ammunition is secured to a bottom plate 17 provided at the bottom of the opening of the second support column 5.

  Reference numeral 18 denotes a guide plate provided above the stopper 12 inside the second support column 5, and a lower end portion of the second intermediate tube 20 is fixed to the through hole 19 of the guide plate. The upper end portion of the first intermediate tube 15 inserted through the through hole 21 of the bottom plate 17 of the second support column 5 and the through hole 13 of the stopper 12 is fitted.

  When the first intermediate tube 15 is inserted through the passage 13 of the stopper 12, the periphery of the aperture has a space portion with a margin, and the stopper 12 tilts and sandwiches the first intermediate tube 15. This is as described above.

  Reference numeral 22 denotes an extension ammunition whose lower end is fixed to one end of the bottom plate 17. The upper end of the extension ammunition is fixed to a part of the rear side of the release piece 24 in which the support shaft 23 serving as a fulcrum is eccentric to the front part. . The release piece 24 is composed of two pieces, and moves up and down with the support shaft 23 as a fulcrum.

  Reference numeral 25 denotes a first release wire having one end fixed to the rear end portion of the release piece 24. When the release wire is pulled, the release piece tilts forward with the support shaft 23 as a fulcrum, and the front end portion of the release piece is inclined. It comes into contact with the hinge 16 'at one end of the stopper 12 in the state and strikes it. At that time, the compression ammunition 16 is separated from the stator 11 that is in contact with the horizontal position by the repulsion, but this is an instant, and the stopper returns to the inclined state again by the resilience of the compression ammunition. The first middle tube is sandwiched.

  Reference numeral 26 denotes a bottom plate provided at a part of the lower end of the third support column 6 in an open state. A stopper 12 is provided at an upper part spaced from the bottom plate, and a guide plate 18 is provided above the stopper.

  The through-hole 13 provided in the stopper 12 has a margin around its diameter, and the second middle tube 20 is inserted therethrough, and the base end of the third middle tube 29 is fixed to the through-hole provided in the guide plate 18. The second middle tube 20 is inserted into the third middle tube.

  The structure surrounding the stoppers 12 and 12, the guide plates 18 and 18, the release pieces 24 and 24, the first release wire 25, the second release wire 27, and the like on the upper and lower sides seen in FIG. 4 is the first support column 4 and the second support column 5. The installation positions are the same except that the mounting positions are reversed.

  Reference numeral 27 denotes a second release wire having one end fixed to the rear end portion of the release piece 24 ′. When the second release wire is pulled, the release piece tilts forward with the support shaft 23 as a fulcrum, and is released. The front end of the piece comes into contact with and hits a hinge 16 'at one end of the stopper 12 in a horizontal position.

  Reference numeral 28 denotes a second main wire, and the tip of the second main wire is inserted into a through hole 11 ′ of another stator 11 and a through hole 13 ′ of another stopper 12 installed inside the lower end of the second support column 5. After that, it is fastened and attached to the fastener 14, but the diameter of the through-hole 13 portion through which the third middle tube 29 of the stopper 12 is inserted has a margin around the same as the measure in the first main wire 9. Form.

  An intermediate sheave 30 is provided on one side of the upper end of the second support column 5, and the second main wire 28 is suspended on the sheave, and a base end portion of the intermediate sheave is provided on the outer intermediate portion of the first support column 4. Attach to part 31.

  Reference numeral 32 denotes an intermediate sheave provided on one side of the upper end of the third column 6 that suspends the upper side of the second release wire 27 that is fixed to the rear end of the release piece 24.

  Reference numeral 33 denotes a mounting plate for fixing the upper end portion of the third middle tube 29.

  Reference numeral 34 denotes a T-shaped release rod which is detachably attached to the outer side of the first support column 4 and is an operating rod for gradually lowering the second and third support columns 6.

  Reference numeral 41 denotes a work table installed on the uppermost stage of the first, second, and third support columns, and a handrail member that can stand up and be folded at the base of the work table via a support shaft 42 and a fixing pin 43. 44 is installed.

  That is, as shown in FIG. 3, in the state where the three-stage column is assembled at the time of work, the handrail member 44 is erected to protect the periphery of the work table 41. The handrail member 44 is folded in the lower side to be stored. (See Figure 1)

  51, 51 ′, 51 ″ are the same number of continuous ladder members as the upright support members 4, 5 and 6, and the entire ladder material is installed in a slanting state of about 75 to 80 ° with respect to the support members. To do.

  In the present invention, the length and number of each first, second, third, .., and the length and number of each first, second, third, .. intermediate tube are arbitrary. The number of main wires and release wires is also arbitrary. Therefore, the configuration of each part is also configured according to this number.

  Now, the features that are characteristic of the present invention are summarized as follows.

  (1) The multistage struts 4 and 5 have first and second main wires 9 and 28 that are independent of each other.

  (2) The multistage supports 4, 5 and 6 have release wires 25 and 27 which are independent from each other.

  (3) In addition to this, it shall have the automatic fall prevention mechanism described below.

  (4) The inclination angle of the ladder member is 80 ° or less.

  The operation of each part in the present invention is as follows.

  (1) The automatic fall prevention function is as follows.

  (A) The fall prevention middle pipes 15, 20, 29, 33 are built in each of the multistage struts, and when the main wires 9, 28 are cut, the stoppers 12, 12 are tilted by the action of the bullets. Thus, the peripheral surfaces of the through-holes 13 and 13 are locked with a part of the middle pipe interposed therebetween, so that the external pillars are not affected.

  (A) After such operation, the locked state is released each time the release wires 25 and 27 are pulled, and the multistage strut is gradually lowered and contracted to be stored.

  (C) When the support is lowered without loosening the manual lock, the stopper will work even if the manual wire is loosened later, even if the main wire is loosened, even if the main wire is loosened. do not do.

  (D) When the first main wire 9 in the first stage support 4 on the winch 7 side is first cut, the other second and third upper supports 5 and 6 are simultaneously locked. .

  (2) The procedure for storing the multistage struts when cutting the first and second stage main wires is as follows.

  (A) The first main wire 9 on the first stage of the winch side descends while loosening the manual lock on the third stage of the third support column 5 and the second stage of the second support column 5, so it gets off from the work table 41. It will be.

  (A) Pull the release lever of the second ladder material 51 'from the floor surface quickly with a hook (2-5mm falls by one pull), and lower the column.

  (C) When the second column 5 of the second stage is lowered and the third column 6 of the third stage is also lowered, the storage is completed.

  (D) If the third stage is also locked, after the second stage is lowered, the third stage release lever is pulled with a hook, and the third pillar 6 is lowered.

  (3) Next, the procedure when the wire on the third eyenut side is cut is as follows.

  (A) Lowering the manual locks of the third and second steps of the support column 5 and descending from the work table 41.

  (A) Use the winch 7 to lower the second strut 5 at the second stage.

  (C) After lowering the second-stage second support column 5, the third-stage release lever is quickly pulled with a hook to lower the third-stage third support column 6.

DESCRIPTION OF SYMBOLS 1 Abutment 2 ... Caster 3 Column base 4 First column 5 Second column 6 Third column 7 Winch drum 8 Handle 9 First main wire 10 Intermediate sheave 11 Stator 11 'Through-hole 12 Stopper 13, 13' Port 14 Fastener 15 First middle tube 16 Compression ammunition 16 'Hinge 17 Bottom plate 18 Guide plate 19 Through hole 20 Second middle tube 21 Through hole 22 Stretching machine 23 Support shafts 24, 24' Release piece 25 First release Wire 26 Bottom plate 27 Second release wire 28 Second main wire 29 Third middle tube 30 Intermediate sheave 31 Attachment portion 32 Intermediate sheave 33 Attachment plate 34 Release rod 41 Work table 42 Support shaft 43 Fixing pin 44 Handrail member 51, 51 ', 51 '' Ladder material 52 ... Stand

Claims (3)

The first column is inserted into the column base provided on the movable fixed abutment, the second column is inserted into the first column, and the third column is inserted into the second column. In a wire lift provided with a winding winch drum for the first main wire, the first main wire is suspended on an intermediate sheave provided on one side of the upper end of the first support column, and the distal end of the first main wire is fitted and inserted. The first column is inserted into the first column and is inserted into the first column through a stopper hole that is inserted into the second column and descends from the stator hole and contacts and separates from the lower part of the stator. The stopper is formed so that the stopper can be tilted around the stopper portion where the first middle pipe disposed in the two struts is inserted, and the other end of the stopper is provided with an opening bottom portion of the second strut. Fasten the upper end of the compression ammunition with the lower end fixed to the bottom plate, and fix the lower end to one end of the bottom plate. The upper end of the extension ammunition is fastened to the lower part of the release piece whose front end is in contact with and separated from the upper surface of the other end of the stopper, and one end of the first release wire is fastened to the other end of the release piece. The first release wire is suspended on an intermediate sheave provided on one side of the upper end of the second support column, and the second main wire is suspended in parallel on the intermediate sheave and provided above the stopper inside the second support column. The lower end portion of the second intermediate tube is fixed to the through hole of the guide plate, the upper end portion of the first intermediate tube is fitted into the second intermediate tube, and the work table is mounted on the plurality of support columns having the above structure. Wire lift characterized by being installed. 2. The wire lift according to claim 1, wherein the same number of steps of continuous ladder members are installed on the abutment so as to have an inclination angle of 75 ° to 80 ° adjacent to the plurality of steps of the support members. The wire lift according to claim 1, wherein the number of support columns, main wires, and release wires is not limited, and the number of components in each unit is not limited.

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