JP4657330B2 - Support rotating tool and standing ladder using it - Google Patents

Description

  The present invention relates to a support rotating tool that can be attached to an arbitrary object such as a ladder, a stepladder, or a support, and a standing ladder that can be hung on the side of a vehicle body or a wall of a truck.

  In general, the height of a truck bed is about 1 m, and when it goes up to the bed, it often jumps down and there is a risk of damaging the legs, waist, knees and the like. In order to improve this point, various things are considered as the standing ladder for trucks used for raising and lowering the truck bed. As an example, a ladder frame that can be stood on a truck bed with a rectangular frame-shaped handrail attached (Patent Document 1) or a telescopic ladder that is tilted down on the side of the truck bed from above and below. There exists a thing (patent document 2) etc. provided with the clamping piece which can be pinched.

JP 2005-48381 A JP 2008-2108 A

(1) Since the handrail in Patent Document 1 is attached to the side of the ladder body, when the user rises to the upper side of the ladder, the handrail becomes lower than the user and is difficult to grasp.
(2) Patent Document 2 discloses a handrail extending upward from the ladder. However, since the handrail extends on an extension line of the ladder main body that is slanted on the track, the upper portion of the handrail is inclined forward. Therefore, in order for the user to grasp the handrail, the body is turned forward and it is difficult to climb the ladder.
(3) Since a locking tool (Patent Document 1) and a knob mechanism (Patent Document 2) are provided, the ladder does not easily tilt or fall even when a vertical force is applied to the ladder. If a force in the left-right direction is applied, it tends to tilt or fall over.

  An object of the present invention is to provide a support body to which a handrail or other object can be attached, a support body rotating tool capable of attaching a handrail or other object attached to the support body to a ladder, a pole, etc. An object of the present invention is to provide a standing ladder that can solve the above-mentioned problems of a hanging ladder for trucks and can be hung not only on a truck but also on a wall of a building.

  The support rotator according to the present invention includes a base that can be attached to an arbitrary object, a receiver that projects laterally from the base, and a block that is attached to the side of the receiver. , Provided with a support body that can be equipped with other members, the block is mounted on the horizontal axis so as to protrude from the side of the receiver and can be pivoted around the horizontal axis; It can rotate horizontally around the axis, can rotate horizontally to the state of being placed on the block and the state of being placed on both the block and the receiver, and the support is off the receiver and placed on the block In this state, the support can be turned in the same direction by turning the block.

  The support rotating tool of the present invention can be configured as follows. The other member equipped on the support body as described in claim 2 is a vertically long handrail, and the handrail protrudes upward and is mounted on the support body. As described in claim 3, hooks that can be pressed or locked to a support such as a side of a truck body, a side wall, or a wall of a building are provided on and / or one of the handrails, and the hooks are fixed. Or height adjustable. 5. A connecting structure such as a sheath tube capable of covering a base material with another object or a shaft that can be inserted into another object as described in claim 4. 6. The front end in the protruding direction of the receiver as defined in claim 5.

  The standing ladder according to the present invention is a standing ladder comprising a ladder that can be hung on a support such as a side of a vehicle body of a truck, a roof, and a wall of a building, and a handrail connected to an upper portion of the ladder. The base of any one of the support rotating tools is attached to the top of the ladder. The standing ladder according to claim 7, wherein the support is a side of the vehicle body of the truck, a turn, and a wall of the building, and the receiver and the handrail are provided with a hook and provided on the receiver. The hooks can be pressed or locked to the side of the vehicle body of the truck or a tilted turn, and can be locked to the upper edge portion of the raised stand of the hook provided on the handrail.

The support rotating tool of the present invention has the following effects.
(1) Since the support body can be swung together with the block and can be horizontally rotated on the receiver and the block, the handrail and other members attached to the support body can be moved by turning the block and rotating the support body horizontally. Easy to change direction and fold. For this reason, even if a long object such as a handrail is attached to the support, it can be folded downward, so that it does not get in the way when being carried or stored.
(2) Since the base is provided with a connecting structure such as a sheath tube that can be put on another object or a shaft that can be inserted into another object, it can be easily attached to the upper end of a ladder or a column. It is possible to easily replace the member.
(3) Since the front end of the receiver projecting forward from the base body is obliquely upward, the handrail projecting upward from the support body is vertical even when the ladder is slanted on the track or the wall of the building. Can be upwards.
(4) Since it has a hook that can be pressed or locked to the track or the wall of the building, it can be attached to a ladder that leans on the track or the wall of the building. The ladder can be stabilized because it can be pressed or locked against the wall of the building.

The standing ladder according to the present invention has the following effects.
(1) Since the base of the support rotator is attached to the upper part of the ladder that can be hung on the side of the vehicle body or on the wall surface, a handrail protruding upward is attached to the support of the support rotator. Then, the handrail can be grasped and moved up and down to the track, and the lifting and lowering is facilitated.
(2) Since the hooks are provided on the receiver, the ladders leaning on the hooks are stabilized by locking the hooks to the track or the wall of the building.
(3) Since the front end side of the receiver projecting sideways from the base is obliquely upward, the handrail projecting upward from the support body is vertical even when the ladder is slanted on the track or the wall of the building. Or, it is almost vertically upward, and the upper body does not bend forward when grabbing the handrail, and the body is stabilized even when grabbing the handrail.
(4) If the hook is adjustable in height, the position of the hook can be adjusted according to the height of the track, so if there is a single support rotating tool, the height of the bed and the height of the height It can be used for trucks of various sizes (ton tonnages) having different sizes, etc., and it is not necessary to prepare or carry several types of support rotating tools of different sizes, and management and use are easy.
(5) If hooks are provided on both the receiver and the handrail, the hook (lower hook) of the receiver is pressed against the side of the truck body, and the handrail hook (upper hook) is placed on the side of the truck body. The ladder can be stabilized because it can be locked to the upper edge of the standing sword. Moreover, since the load of the operator who grasps the ladder or the handrail is dispersedly supported by the two hooks, the load applied to the turn and the wall surface is dispersed and they are not easily damaged.

(Embodiments of support rotating tool and standing ladder)
An example of an embodiment of the support rotating tool of the present invention will be described with reference to the drawings. The support rotating tool of the present invention can be attached to various articles such as ladders and columns, but the support rotating tool 1 of the embodiment shown in FIGS. 6 and 7 is the leg of the ladder 2 as shown in FIGS. 3 can be attached. As shown in FIG. 3, the support rotating tool 1 includes a base 4 that can be attached to the upper end of the leg 3 of the ladder 2, a receiver 5 (FIG. 6, FIG. 7) that projects laterally toward the front of the base 4, A block 6 projecting laterally from the body 5 and a plate-like support 7 that can be placed on the upper surface of the receiver 5 and the block 6 are provided. At the upper end of the ladder 2 as shown in FIG. At this time, the handrail 8 on the support 7 can be folded from the standing state in FIG. 1 to the downward direction in FIG.

  In the example shown in FIGS. 1 and 2 as an example of the ladder 2, a plurality of steps 9 are vertically attached at equal intervals between two legs 3. Each tread board 9 is attached in the illustrated horizontal direction. The attachment can be performed by welding, bolts and nuts, or other means. The attachment to the leg 3 or the attachment rotating in the vertical direction is possible. The legs 3 are hollow elongated square members. An anti-skid tool 10 (FIG. 3) made of rubber or resin is attached to the lower end of the leg 3. A handrail holder 11 for holding the handrail 8 folded downward is attached to the leg 3. The handrail storage tool 12 has a holding tool 13 bent in a substantially U shape attached to the tip of a support piece 12 bent in a substantially L shape. The holder 13 includes an opening 14 for pushing the handrail 8. An outer peripheral edge of a square plate-like stopper 15 is welded and fixed to the inside of the upper end of the leg 3 of the ladder 2 as shown in FIG. A hole 16 is opened at the center of the stopper 15. A round bar-shaped guide shaft 17 is penetrated from below to above the hole 16.

  A sheath pipe (square pipe) is used for the base body 4 (FIGS. 6 and 7) of the support rotating tool 1. As this square pipe, a square pipe having a size that can be put on the upper end portion of the leg 3 of the ladder 2 is used as shown in FIG. 2, and the upper surface of the square pipe is closed by the ceiling plate 18. When the upper end portion of the leg 3 is covered, the upper end portion of the leg 3 does not protrude upward through the square pipe. Further, as shown in FIG. 5, the upper end portion of the guide shaft 17 is welded and fixed to the center portion of the ceiling plate 18 so that the base body 4 can be moved up and down along the legs 3 together with the guide shaft 17. When the flange 19 (FIG. 5) at the lower end of the guide shaft 17 comes into contact with the stopper 15 (FIG. 5), the guide shaft 17 and the base body 4 are stopped without being raised further, and conversely, the base body 4 is guided. When the inner surface of the ceiling plate 18 is lowered with the shaft 17 and hits the upper edge 20 (FIG. 5) of the leg 3, the guide shaft 17 and the base 4 are prevented from further descending.

  The receiving body 5 (FIGS. 6 and 7) is also a square member, is fixed and protrudes from the front surface of the upper end portion of the base body 4, and has a tip end side obliquely upward. Since the receiving body 5 and the base body 4 are both made of metal, they are fixed to each other by welding.

  A hook (lower hook 21) projects downward from the receiver 5 at the tip of the receiver 5 (FIGS. 6 and 7). The lower hook 21 is configured to be pressed against the vehicle body side surface 23 of the truck 22 when the ladder 2 is stood on the truck 22 as shown in FIG. The lower hook 21 is also made of metal and is attached to the receiver 5 by welding. This attachment may be an attachment with a connecting tool such as a bolt and a nut. The lower hook 21 is a rectangular thin plate, but may have other shapes and structures, for example, a square or polygonal plate or a three-dimensional shape. A rubber anti-slip material 24 (FIG. 3) is attached to the outer surface of the lower hook 21 with an adhesive. Non-slip processing can also be performed by making irregularities on the outer surface without using the anti-slip material 24. As shown in FIG. 2, the lower hook 21 is pressed against a tilted turn 25 of the track 22 or is inserted from above the turn 25 into a gap 26 (FIG. 2) formed between the turn 25 and the vehicle body side surface 23 of the track 22. be able to.

  A block 6 is attached to the side surface of the receptacle 5 (FIGS. 6 and 7). The block 6 is a solid metal cube. A lateral screw hole 27 (FIG. 7) is formed from one side surface to the opposite side surface, and a vertical screw hole 28 (FIG. 7) is formed from the upper surface to the lower surface. The screw holes are formed so as to be offset from each other so as not to cross each other. In the block 6, the horizontal shaft 29 (FIGS. 6 and 7) is screwed into the lateral screw hole 27, and the horizontal shaft 29 is screwed to the horizontal screw hole 30 (FIG. 7) of the receiver 5 to rotate the horizontal shaft 29. The shaft can be rotated 360 degrees vertically in the direction of the arrow XY in FIG. When the tip of the horizontal shaft 29 protrudes to the outside of the lateral screw hole 27 of the block 6, the nut 31 can be screwed into the protruding portion to prevent the horizontal shaft 29 from coming off.

  On the block 6 (FIGS. 6 and 7), a superposed portion 32 (FIG. 7) of a thin plate-like support 7 having a substantially L-shaped planar shape is disposed. 7, the vertical axis 34 is inserted into the vertical hole 33 opened in the overlapping portion 32 as shown in FIG. 7, and the tip side of the vertical axis 34 is screwed into the vertical screw hole 28 of the block 6 to block the support 7. 6 so that it can rotate horizontally in the direction of the arrow OP in FIG. 6B with the vertical axis 34 as the rotation axis. When the tip of the vertical axis 34 protrudes to the outside of the vertical screw hole 28 of the block 6, a nut 35 (FIG. 6C) is screwed into the protrusion to prevent the vertical axis 34 from coming off. be able to.

  As shown in FIG. 6 (b), the support 7 which is off the top of the receiver 5 is horizontally rotated in the direction of the arrow O in FIG. 6 (b) to block 6 and the receiver 5 as shown in FIG. Can be placed on both sides. A positioning hole 36 (FIGS. 6 and 7) is opened in the support body 7, and a stopper hole 37 is opened in the receiver 5, and both the block 6 and the receiver 5 are opened as shown in FIG. When the locking pin 38 (FIGS. 6 and 7) is inserted from the positioning hole 36 of the support 7 placed above into the stop hole 37 of the receiver 5, the support 7 is positioned on both the block 6 and the receiver 5. When the locking pin 38 is pulled out, it can be rotated horizontally in the direction of the arrow OP as shown in FIG. 6B.

  As shown in FIG. 7, the locking pin 38 includes an elongated rod-shaped shaft portion 39 and a head portion 40 at the tip of the shaft portion 39. A bolt can be used for the locking pin 38, which is screwed into the stop hole 37 from the positioning hole 36, and a nut (not shown) is screwed and fixed to the bolt protruding part protruding downward from the stop hole 37. You can also The locking pin 38 can be fixed to the ladder 2, the support 7, etc. with a chain, a wire, a string or the like so as not to be lost when not in use.

  A handrail 8 is erected on the support 7 (FIGS. 6 and 7). The handrail 8 is erected vertically on the upper surface of the support 7 and its lower end is fixed to the support 7 by welding. Although the handrail 8 is formed in an elongated round bar shape so that the user can easily grasp it, it can be formed in an arbitrary shape such as an elongated square bar or an elongated flat plate. Although the length of the handrail 8 can also be selected arbitrarily, it is set to a length that protrudes upward from the raised shaft 25 (FIG. 1). An upper hook 41 (FIG. 1) is attached to the handrail 8. The upper hook 41 has a rectangular plate shape, and is attached to the tip of a plate-like spacing member 43 (FIG. 1) projecting from a cylinder 42 slidably mounted on the handrail 8 to raise the track 22 upright. It can be locked to the upper edge from above. The cylinder 42 can be fixed to the handrail 8 by tightening a set screw 44 (FIG. 1), and can be slid along the handrail 8 by loosening, and the position (height) of the upper hook 41 is adjusted by this slide. Then, it can be fixed at a desired position (height) by tightening the set screw 44 (FIG. 1).

  The standing ladder of the present invention is attached to the leg 3 by covering the base 4 of the support rotating tool 1 of the above-described embodiment on the upper end of the leg 3 of the ladder 2. The base 4 has a long part covering the legs 3 so that the ladder 2 does not fall off carelessly.

(Usage example 1 of support rotating tool)
As shown in FIG. 6C, the handrail 8 that faces downward is directed upward as follows.
(1) The support 7 is vertically rotated in the direction of arrow Y in FIG. 6C, and the support 7 is directed upward as shown in FIG. 6B.
(2) In the state (1), the support 7 is turned in the direction of arrow O in FIG. 6B to place the support 7 on the block 6 and the receiver 5.
(3) In the state (2), as shown in FIG. 6A, the locking pin 38 is inserted from the positioning hole 36 (FIGS. 6 and 7) of the support body 7 into the stop hole 37 of the support body 5 so as to support the support body. 7 is fixed on the block 6 and the receiver 5.

(Use Example 2 of Support Rotator)
The handrail 8 that is facing upward as shown in FIG. 6A is directed downward as follows.
(1) After removing the locking pin 38 in FIG. 6A, the support 7 is horizontally rotated in the direction of arrow P in FIG. 6B until the overlapping portion 32 of the support 7 is disengaged from the receiver 5. .
(2) In the above state, the support 7 is turned in the direction of arrow X in FIG. 6C to turn the support 7 downward, and the handrail 8 attached to the support 7 is turned downward.

(Usage example 1 of the standing ladder of the present invention)
An example of using the standing ladder according to the present invention will be described with reference to FIG. This example of use is an example in the case of using by standing on the raised turn 25.
(1) The support rotator 1 attached to the upper end of the ladder 2 as shown in FIG. 3 is configured to manually rotate the support 7 in the direction of arrow X in FIG. 8 is faced down, and the handrail 8 is pushed and held in the handrail holder 11 provided on the leg 3 of the ladder 2.
(2) Before standing the ladder 2 on the track 22, the block 6 is turned in the direction of the arrow Y in FIG. 6C so that the handrail 8 faces upward as shown in FIG. b) is horizontally rotated in the direction of arrow O and arranged on the block 6 and the receiver 5, and the locking pin 38 is positioned on the positioning hole 36 of the support 7 (FIGS. 6 and 7) as shown in FIG. 6A. Then, the support 7 is fixed on the block 6 and the receiver 5 by being inserted into the stop holes 37 of the receiver 5.
(3) In the state (2), the ladder 2 is stood on the vehicle body side surface 23 of the truck 22 as shown in FIG. In this case, the lower end of the leg 3 of the ladder 2 is placed on the ground, and the lower hook 21 is pressed against the vehicle body side surface 23 of the truck 22.
(4) The handrail 8 protrudes above the turn 25 by the above (3). At this time, the tightening of the set screw 44 of FIG. 1 is loosened, and the cylinder 42 integrated with the upper hook 41 is slid according to the height of the turn 25 of the track 22 and is put on the upper edge of the turn 25 to be locked. At that position, the set screw 44 is tightened to fix the cylinder 42 and the upper hook 41 is also fixed. As a result, the ladder 2 is held obliquely on the track 22. At this time, as shown in FIG. 6 (b), the receiving body 5 attached obliquely upward to the base body 4 becomes almost horizontal, so that the support body 7 mounted on and stopped on the block 6 and the receiving body 5 is almost fixed. It becomes horizontal and the handrail 8 becomes almost vertical.
(5) In the state shown in FIG. 1, the worker on the ground can ascend the ladder 2, grab the handrail 8, and go up to the loading platform 45 of the truck 22. Also, an operator on the loading platform 45 can go down the ladder 2 by grasping the handrail 8. At this time, since the handrail 8 extends vertically above the turn 25, the operator can lift the ladder by holding the handrail 8 straight without bending the upper body.

(Usage example 2 of the standing ladder of the present invention)
A second usage example of the standing ladder according to the present invention will be described. In this example of use, as shown in FIG. 2, the lower hook 21 of the support rotator 1 attached to the upper end of the ladder 2 is locked in the gap 26 formed between the body of the truck 22 and the turn 25 tilted downward. This is an example of using.

(1) The ladder 2 is hung on the vehicle body side 23 of the truck 22, and the lower hook 21 of the support rotating tool 1 is inserted into the gap 26 and locked. At this time, as shown in FIG. 4 (b), the base 4 covering the upper part of the leg 3 of the ladder 2 slides in the direction of the arrow R, and the position of the lower hook 21 is lowered as shown in FIG. 4 (a). It is inserted into the gap 26 (FIG. 2).
(2) In the state of (1), the handrail 8 is substantially vertically upward and protrudes above the loading platform 45 of the track 22. In this case, since the upper hook 41 attached to the handrail 8 is not used, the upper hook 41 is moved and fixed to a position where it does not interfere with the raising and lowering. Also in this case, the set screw 44 (FIG. 1) is loosened and slid to a desired position, and the set screw 44 is tightened to fix the position.

(Other embodiments of the present invention)
The base 4, the receiver 5, the block 6, the support 7, the shape of the standing ladder, the structure, the attachment structure, the connection structure, and the like of the support rotating tool 1 of the present invention can be other than those described above.

Explanatory drawing which shows the example of use at the time of engaging the standing ladder according to this invention with the standing upright. Explanatory drawing which shows the usage example at the time of engaging the standing ladder of this invention with the fallen to which it leaned. The perspective explanatory view showing an example of the standing ladder of the present invention. It is explanatory drawing of the state which covered the base | substrate of the support rotating tool of this invention on the upper end part of the leg of a ladder, (a) is explanatory drawing of the state which the leg of the ladder slid above the base | substrate, (b) is a ladder. Explanatory drawing of the state which slid | legged below the base | substrate. Cross-sectional explanatory drawing of the state which covered the base | substrate of the support body rotary tool of this invention on the upper end part of the leg of a ladder. It is explanatory drawing of an example of the support body rotary tool of this invention, (a) is explanatory drawing of the state which turned up the handrail, (b) is description of the state which rotated the support body horizontally and removed from the receiving body. FIG. 4C is an explanatory diagram of a state where the handrail is directed downward. Exploded view of the support rotating tool of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Support body rotary tool 2 Ladder 3 Leg 4 Base body 5 Receiver 6 Block 7 Support body 8 Handrail 9 Footboard 10 Slip stopper 11 Handrail holder 12 Support piece 13 Holder 14 Opening part 15 Stopper 16 Hole 17 Guide shaft 18 Ceiling board 19 ２０ 20 Upper edge 21 Lower hook 22 Truck 23 Car body side surface 24 Non-slip material 25 Slip 26 Gap 27 Lateral screw hole 28 Vertical screw hole 29 Horizontal shaft 30 Horizontal screw hole 31 Nut 32 Superposed portion 33 Vertical hole 34 Vertical axis 35 Nut 36 Positioning hole 37 Stopping hole 38 Locking pin 39 Shaft 40 Head 41 Upper hook 42 Cylinder 43 Spacing material 44 Set screw 45 Loading platform

Claims (7)

  It has a base that can be attached to any object, a receiver that projects laterally from the base, a block that is attached to the side of the receiver, and a support that can be equipped with other members. Mounted projecting to the side of the receiver and swiveling around its horizontal axis, the support body is mounted on the block by a vertical axis and can be rotated horizontally around the vertical axis, and placed on the block Can be rotated horizontally until it is placed on both the block and the receiver, and the support is turned in the same direction by turning the block while the support is off the receiver and placed on the block. A support rotator characterized by being able to be made.   2. The support rotating device according to claim 1, wherein the other member mounted on the support is a vertically long handrail, and the handrail protrudes upward and is mounted on the support. Ingredients.   3. The support rotating tool according to claim 1 or 2, wherein a hook that can be pressed against or locked to a support such as a side of a truck body, a turn, or a building wall is both a receiver and a handrail. A support rotator provided on one side, the hooks being fixed or adjustable in height.   The support rotating tool according to any one of claims 1 to 3, further comprising a connecting structure such as a sheath tube that can be put on another object or a shaft that can be inserted into another object. Support rotating tool.   The support rotating tool according to any one of claims 1 to 4, wherein the front end side of the receiving body in the protruding direction is obliquely upward.   6. A standing ladder comprising a ladder that can be hung on a support such as a side of a truck body, a truck, a building wall, and a handrail connected to the upper part of the ladder. A stand-up ladder comprising a base of the support rotating tool according to claim 1 attached thereto.   The standing ladder according to claim 6, wherein the support is a side of the truck body, a turn, a wall of the building, the receiver and the handrail are provided with a hook, and the hook provided on the receiver is a side of the truck body or A standing ladder characterized in that it can be pressed or locked against a tilted turn, and a hook provided on the handrail can be locked to an upper edge portion of the raised turn.

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