JP2013213407A - Fixing device of elevating and lowering step - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform fixation by simple work when placing a gate of a truck loading space in the state of being brought down in a horizontal state for instance, to reliably keep a step at a prescribed position after the fixation, and to improve storability in the truck loading space of the step with a few projection parts in a folded state in nonuse.SOLUTION: In a fixing device of an elevating and lowering step for which step plates are attached to a pair of columns 1 on both sides at appropriate intervals, a thin and long planar bend member is bent into an L shape, and a fixing member is formed by a lower pressing member 12 for horizontally pressing a part to be fixed vertically from the front and horizontally from the lower part, and a thin and long planar upper pressing member 15 for pressing the part to be fixed horizontally from an upper part. The lower pressing member 12 and the upper pressing member 15 are pivoted freely turnably in the vertical direction respectively to the side part of the column 1, and the upper pressing member 15 is provided at an inward position of the lower pressing member 12.

Description

  The present invention relates to a fixing device for an ascending / descending step as a ladder that is used by leaning on a required part of a truck bed, for example.

  In order for the worker to ascend / descend from / to the loading platform for working on the loading platform of the truck, or to descend / carry with a small baggage or the like from the loading platform, an ascending / descending step is required.

  The truck bed has a tilt that can be opened and closed around it, but as the steps for getting on and off the truck bed, raising and lowering and loading and unloading the load, a moving step with a staircase structure with wheels is used. There are difficulties in location and ease of installation, and it is not suitable for mounting on a truck bed when unnecessary.

  On the other hand, in this way, a ladder dedicated to trucks that allows workers to ascend and descend the cargo bed part for carrying out work on the truck bed part or to carry small parcels etc. from the cargo bed part. Conventionally, this has not been known. Therefore, for raising and lowering at the truck bed, an ordinary ladder is used in which a pair of struts are horizontally mounted at a predetermined interval on both sides of a pair of pillars.

  However, an ordinary ladder is leaned as it is on a required part of the truck bed, for example, a roll outer plate attached to the load bed (the side roll outer plate on the left and right sides and the rear roll outer plate on the rear side). When used, the ladder is likely to fall down from the board, so other workers etc. other than the worker who goes up and down the ladder have to hold the ladder, which is very troublesome.

Patent Document 1 listed below is an alternative to an ordinary ladder. For example, the upper end of the outer cover plate of the truck bed, the handrail attached on the upper cover plate, or the load base portion in a state where the turn outer plate is tilted down. It has been proposed that even if it is leaned, it can be safely held without falling over.
JP 2005-48381 A

  As shown in FIG. 4, the truck elevating ladder A is composed of a ladder 3 in which a pair of struts 1 are horizontally mounted on a pair of struts 1, 1 at a predetermined interval, and a strut 1 on one side of the ladder 3. It is composed of a handrail 4 to be attached and a latch 6 provided on the upper side of each of the struts 1 and 1 of the ladder 3 and hooked at a standing position of the loading platform 5 of the truck.

  Although not shown in the drawings, each column 1 of the ladder 3 includes a column body and an expansion / contraction member connected to the lower end portion of the column body so that the expansion / contraction can be freely adjusted. A grounding base 9 is provided at the lower end portion of the expansion / contraction member. It is pivotally attached. Anti-slip is applied to the bottom surface of the grounding base 9.

  The latching tool 6 includes a pivotable pivot plate 10 having one end pivotally attached to each column 1 of the ladder 3 and a substantially L-shaped latch body fixed to the tip of the pivot plate. 11, a latch position holding means for holding the latch body 11 at a latch position protruding horizontally forward from the column 1 when the ladder 3 is in a leaning posture with a predetermined inclination angle, and the latch body 11 It is comprised by the retraction position holding means hold | maintained at the retraction position retracted | saved to the support | pillar 1 side.

  The usage method will be described. When using the lift ladder A, when the lift R is tilted on the base end portion 37 of the lift R in a state where the lift R of the truck bed 5 is tilted, the ladder 3 is placed on the ground G. The hook body 11 of the hook 6 is hooked to the base end portion 37 of the lift R pivotally attached to the loading platform 5 while being tilted forward so as to have a predetermined inclination angle.

  Similarly, when the lift R is erected with respect to the loading platform 5 and the lifting ladder A is stood on the upper end portion of the guard bar 38 standing on the lift R, the latch 6 is similarly locked. The tool body is hooked on the upper horizontal frame of the guard bar 38.

  In this way, when the lifting ladder A is leaned against a required part of the truck bed part 5 and used, the latches 6 provided on the upper sides of the both columns 1 and 1 of the ladder 3 are used to lean the truck bed part 5. 5, in the example of FIG. 5, it is hooked on the base end portion 37 of the tilting R and the upper horizontal frame of the guard bar 38 and is self-held, so there is no need for the operator to hold the ladder 3. No extra workers are required to use A, and the lifting ladder A can be used safely.

  By the way, if the lift of the truck bed can be brought to a horizontal state when loading or unloading the load, it can be used as a work space for the worker to place the load on the lift, which is convenient when loading the entire bed. It is.

  However, the latching tool 6 which is a fixing device for the tilt attached to the truck elevating ladder of Patent Document 1 hooks the substantially L-shaped latching main body 11 so that the tilt of the truck bed is set up vertically. There is no fixing device that can be used in a state where it is folded or folded 180 degrees from this standing state and tilted to a horizontal state.

  JP-A-2000-310093 discloses a fixed hardware that horizontally hangs on an opening slab of a manhole as a folding-type trap used for raising and lowering a manhole and the like, and JP-A-2004-124359 discloses Discloses a step ladder including a mounting portion that is fixed to a horizontal portion of a workbench.

  However, any of the fixing devices disclosed in these inventions requires a tightening screw or a spring for applying a clamping force when the opening slab or the edge of the workbench is sandwiched from above and below, and the structure is complicated. In addition, the workability was not good because it took time and effort to install.

  The present invention eliminates the inconveniences of the above-described conventional example, and for example, by setting the lift of the truck bed in a horizontal state, the load on the lift is temporarily reduced when the worker places a work space on which the worker is loaded or loads are unloaded. Assuming that it will be used as a storage space, even if it leans up in a state where the truck bed is tilted horizontally, it can be safely held without slipping, and the ladder can be used horizontally as a support leg for the cage. In addition to supporting the tilted tilt and increasing the load receiving strength of the tilt, it is easy and reliable to mount to the truck bed, and when not in use, there are few protruding parts in the folded state Thus, an object of the present invention is to provide an elevating step fixing device such as a track elevating ladder for example, which is excellent in storing performance of a step in a truck loading platform.

  In order to achieve the above object, a lifting device for a lifting step according to a first aspect of the present invention is a lifting device for a lifting step in which step plates are attached to a pair of struts on both sides at appropriate intervals, and a fixed portion is provided. A fixing member is formed by a lower pressing member that presses vertically from the front and horizontally from below and an upper pressing member that is an elongated plate that presses the fixed portion horizontally from above, and the lower pressing member and the upper pressing member are A gist is that each side of the support column is pivotally mounted, and the upper pressing member is provided at an inner position of the lower pressing member.

  According to a second aspect of the present invention, the lower pressing member includes a vertical portion that presses the fixed portion from the front, and a horizontal portion that presses the fixed portion from below. The insertion device inserted into the fixed portion from the front end of the horizontal portion extends vertically, and the fixing device for the lifting and lowering step according to the present invention is characterized in that the lower pressing member includes the lower pressing member. The gist is that an opening is formed so that the member and the upper pressing member at the inward position thereof can rotate without interference.

  According to the present invention, for example, when the tilt of the truck bed is tilted horizontally and the lifting step is fixed thereto, the end of the tilt is sandwiched between the lower pressing member and the upper pressing member from the lower side, the front side, and the upper side. By pressing, the lifting step is fixed to the cage.

  When the fixing device is not used, if the lower pressing member and the upper pressing member are respectively rotated to the column side at the column side, they are folded along the side by the column. In this state, since the upper pressing member does not protrude outward from the support column, the storage property is good.

  In addition, since the upper pressing member is provided at an inner position of the lower pressing member, the lower pressing member and the upper pressing member correspond to each other in the vertical position, and are thus firmly fixed to, for example, a track tilt.

  As described above, the elevating step fixing device of the present invention, for example, by setting the tilt of the truck bed in a horizontal state, the load on the lift is used as a work space for workers to load and unload. Assuming that it is used as a temporary storage space for the load, when tilting the platform of the truck bed in a horizontal state, it can be easily fixed with simple operations, and the step can be securely held in place after fixing. Is.

  Furthermore, when the fixing device is not used, if the lower pressing member and the upper pressing member are respectively rotated on the side of the column and folded along the column side, the side of the column does not protrude greatly from the column. It can be stored in the box and has good storage properties.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a lower pressing member which is a main part of an embodiment of a fixing device for a lifting step according to the present invention, and FIG. 2 is a perspective view of a step having the fixing member of the present invention.

  The lifting / lowering step fixing device according to the present invention is installed in a lifting / lowering step of a truck bed as a ladder that is used by leaning on a required part of a lift of the truck bed, for example. The ladder 3 is formed by attaching a plurality of step bars 3a between the pair of support columns 1 and 1 at appropriate intervals.

  The fixing device of the present invention includes a lower pressing member 12 mounted on the ladder 3 and an upper pressing member 15, and the tilting lower pressing member 12 tilted horizontally with respect to the truck bed is shown in FIG. As shown in FIG. 3, the elongated plate-like bending member is bent into an L shape, and is formed by a vertical portion 12 a that pushes in a tilt R that is a fixed portion from the front and a horizontal portion 12 b that pushes in from below.

  The vertical portion 12a and the horizontal portion 12b are provided on both the left and right inner and outer sides of the support column 1, and are used as members for fixing the ladder 3 to the loading platform in a state in which the tilting is rotated 180 degrees vertically. The insertion piece 13 is integrally protruded from the front end of the horizontal portion 12b to the lower side in the perpendicular direction, and the front ends of the left and right insertion pieces 13 are further integrally connected by a horizontal rod 14.

  Further, a mounting portion 16 formed in an elongated U-shape protrudes from the vertical portion 12a, and the support piece 1 is sandwiched in the opening of the mounting portion 16 in the elongated U-shape, and a rotating piece 16a protruding from the lower portion of the mounting portion 16 is provided. It is pivotally attached to the left and right sides of the column 1 so as to be rotatable. Thereby, the vertical part 12a, the horizontal part 12b, and the insertion piece 13 are attached to the support | pillar 1 so that rotation is possible.

  The opening is an opening for allowing the lower pressing member 12 and the upper pressing member 15 at the inner position thereof to rotate without interfering with each other.

  A stopper 17 that locks the mounting portion 16 at a fixed position is pivotally attached to the support column 1 so as to be positioned on the side opposite to the side from which the lower pressing member 12 protrudes with respect to the support column 1. The stopper 17 is formed in a hook shape, and the hook portion at the tip is locked to the lower edge of the attachment portion 16.

  The elongated plate-like upper pressing member 15 that holds the fixed portion horizontally from above is a separate member from the lower pressing member 12, and the end of the elongated plate-like member is placed at a position below the rotating piece 16a. 1 was pivotally attached to one side.

  As a result, the upper pressing member 15 is located between the vertical portions 12 a and 12 a protruding from the left and right side portions of the support column 1, and can be projected and retracted substantially parallel to the horizontal portion 12 b above the lower pressing member 12.

  Since the lower pressing member 12, the upper pressing member 15, the insertion piece 13, and the horizontal rod 14 are members that directly contact the tilt, the truck bed, etc., the softness is prevented in order to prevent the tilt and the like from being damaged. Cover with a soft material such as PVC.

  A reference numeral 18 shown in FIG. 2 is an upper fixing member used when the ladder 3 is fixed to the tilt while the tilt is set up vertically.

  Next, for example, the method of use will be described with reference to an example in which the fixing device of the present invention is attached to a ladder that is fixed to the tilt of a truck bed. When not in use, as shown in FIG. 3, the lower pressing member 12 rotates upward at the position of the rotating piece 16 a and is folded along the side of the column 1.

  Similarly, the upper pressing member 15 is also pivoted downward with the end portion as a pivot shaft and folded in parallel with the support column 1. The stopper 17 also rotates downward under its own weight and hangs down along the column 1. Therefore, since the lower pressing member 12, the upper pressing member 15, and the stopper 17 do not protrude greatly from the support column 1, the storage property is good.

  In order to fix the ladder 3 to the tilt that has been horizontally lowered from this state, in order to fix the fixing device to the tilt, the stopper 17 is pivoted upward in the clockwise direction in FIG. Rotate upward in the counterclockwise direction. Thereby, the stopper 17 and the upper pressing member 15 do not hinder the rotation of the lower pressing member 12.

  When the lower pressing member 12 is rotated downward in the clockwise direction via the rotating piece 16a, the lower pressing member 12 and the upper pressing member 15 project horizontally in the tilt direction as shown in FIG. .

  Therefore, the hook portion at the tip of the stopper 17 is locked to the upper edge of the mounting portion 16 and fixed so that the lower pressing member 12 does not rotate in the storage direction.

  The height of the ladder 3 is adjusted so that the lower pressing member 12 matches the height of the cage, and the end of the cage is matched with the opening formed by the horizontal portion 12b and the upper pressing member 15, and the inside of the opening is Is inserted until the tip of the upper part contacts the upper pressing member 15. In this case, since the upper pressing member 15 is formed so as to be rotatable, the state in which the end of the tilt is inserted until it hits the upper pressing member 15 is the state in which it is inserted to the back. There is nothing.

  Further, in this state, the tilt is sandwiched from above and below, and the stopper 17 prevents the lower pressing member 12 from coming off from the tilt in the direction in which the ladder 3 is tilted, so that safety during raising and lowering can be ensured.

  In order to fix the fixing device of the ladder 3 to the truck in a state in which the tilt is further rotated downward and the tip is tilted vertically downward, the tip insert 13 is attached to the head and the floor of the truck bed. Is inserted from above into the gap formed between the two.

  As a result, the insertion piece 13 is inserted into a narrow gap with the horizontal portion 12b of the lower pressing member 12 in contact with the upper portion of the cage, and the insertion piece 13 comes out in the direction in which the ladder 3 is tilted without rattling at the time of elevation. It can be used safely without fear.

  As described above, the fixing device can be easily and securely tilted by simply inserting the end of the cage into the lower pressing member 12 or simply inserting the insertion piece 13 into the gap between the cage and the track floor. Can be fixed.

  In order to fix the ladder 3 to the tilt with the tilt standing vertically, the upper fixing member 18 is used.

  Although the said embodiment demonstrated as what was used for the step for raising / lowering to a truck bed, it is not limited to this, It can be used also as a fixing device to a normal ladder or raising / lowering stairs.

It is a perspective view of the principal part which shows embodiment of the fixing device of the raising / lowering step of this invention. It is a perspective view of the step for raising and lowering the truck bed in which the fixing device of the present invention is implemented. It is a side view of the accommodation state which shows embodiment of the fixing device of this invention. It is a whole perspective view which shows the conventional raising / lowering ladder for trucks.

A Lifting ladder R Lifting G Ground 1 Strut 2 Spade 3 Ladder 3a Step bar 4 Handrail 5 Loading platform 6 Hook 9 Grounding base 10 Rotating plate 11 Hook body 12 Lower pressing member 12a Vertical section 12b Horizontal section 13 Difference Inserting piece 14 Horizontal rod 15 Upper pressing member 16 Mounting portion 16a Rotating piece 17 Stopper 18 Upper fixing member 37 Base end portion 38 Guard bar

Claims (3)

  A step-up / down step fixing device in which step plates are attached to a pair of struts on both sides at appropriate intervals, a lower pressing member for pressing a fixed portion vertically from the front and horizontally from below, and a fixed portion horizontally from above A fixed member is formed by an elongated plate-like upper pressing member that is pressed into the upper pressing member, and the lower pressing member and the upper pressing member are pivotally attached to the column side portions, respectively, and the upper pressing member is a lower pressing member An elevating step fixing device characterized by being provided at an inward position of a member.   The lower pressing member includes a vertical portion for pressing the fixed portion from the front, and a horizontal portion for pressing the fixed portion from below, and the insertion piece inserted into the fixed portion from the tip of the horizontal portion is vertically The fixing device of the raising / lowering step of Claim 1 currently extended.   3. The opening according to claim 1, wherein the lower pressing member is formed with an opening for allowing the lower pressing member and the upper pressing member at an inward position thereof to rotate without interfering with each other. Fixing device for lifting steps.

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