JP4712403B2 - Stable installation tool, ladder body provided with the stable installation tool, and ladder apparatus provided with the ladder body - Google Patents

Description

  The present invention relates to a stable installation tool for stably grounding a leg portion such as a stepladder or ladder to the ground, a ladder body provided with the stable installation tool, and a ladder device provided with the ladder body.

Conventionally, this type of technology includes a base member (base) that can be grounded to the ground and the like, and a mounting member (bracket) that attaches this base member to the end of a column that constitutes the leg portion of the ladder. There is a stable installation tool (a column lower end stabilizer) in which a member is configured to be rotatable through an attachment member (see, for example, Patent Document 1).
In this stable installation tool, the lower part of the mounting member is formed in an annular shape, and a cylindrical pipe is rotatably interposed therein. The bearing body provided in the base member, the annular part of the mounting member, and the pipe The base member is pivotable about the pivot axis and the axis of the pipe by forming a hole through which the pivot axis is inserted and connecting the pivot axis to these holes.
Utility Model Registration No. 2564332

The conventional stable installation tool requires a base member, a mounting member, a cylindrical pipe, and a pivot for connecting them, and the assembly work is troublesome because of a large number of parts.
Therefore, the present invention can rotate the base member in any direction without using a pivot, and can easily assemble by reducing the number of parts by connecting the base member and the mounting member in a chain shape. It is an object of the present invention to provide a stable installation tool, a ladder body including the stable installation tool, and a ladder device including the ladder body.

In order to achieve the above object, the present invention takes the following technical means.
That is, first, the stable installation tool 1 forms an engaging portion 27 on the upper surface of the base member 23 that can be grounded, and the connecting member 24 attached to the column 10 is connected to the engaging portion 27 of the base member 23 in a chain shape. An attachment portion 33 to be coupled is provided, and the base member 23 is provided with restriction means 39 for setting the maximum rotation angle of the base member 23 that rotates along the arc direction of the engagement portion 27 to be smaller than 90 °. It has established and wherein the Rukoto.

According to this, the base member 23 can be rotated as required without using the pivot, simply by connecting the engaging portion 27 of the base member 23 and the mounting portion 33 of the mounting member 24 in a chain form. And the stable installation tool 1 can be comprised with two members, the base member 23 and the attachment member 24, and it can assemble easily by making a number of parts small.
Moreover, it is possible to prevent the base member 23 from rotating more than necessary, and to control the rotation posture in one direction.

Second, the engagement portion 27 and the attachment portion 33 are formed in an arc shape that contacts each other on an arc surface.
According to this, the base member 23 can be smoothly rotated to a large angle along the arc surface .
Third , when the base member 23 is pivoted to the side of the mounting portion 33 around the mounting portion 33, the mounting member 24 is centered on the engaging portion 27 from the pivoted state. The base member 23 is allowed to rotate.

According to this, the base member 23 can be further rotated around the attachment portion 33 in a rotation state around the engaging portion 27.
Fourth, the base member 23 is characterized in that the posture maintaining means 44 for holding the attitude with respect to the mounting member 24 of the base member 23 is provided.
According to this, since the posture of the base member 23 is maintained even if the base member 23 is separated from the grounding surface, it is convenient when the base member 23 is grounded again.

Fifth , the ladder body 3 includes the stable installation tool 1, and includes a pair of left and right columns 10 and a plurality of upper and lower bars 11 that connect the left and right columns 10, and an engaging portion 27 of the base member 23. The attachment member 24 is attached to one end portion of each column 10 such that the center of the pillar body 3 faces the left-right direction of the ladder body 3.
According to this, the base member 23 can be attached in a direction suitable for use of the ladder body 3.

Sixth , the ladder device 2 includes the ladder bodies 3 as a pair, and one end portions of the ladder bodies 3 are connected to each other via a connecting means 4.
According to this, since the ladder device (ladder device) 2 includes the stable installation tool 1, it can be used in accordance with the inclination of the ground contact surface or the like.

  According to the present invention, it is possible to cause the base member to rotate as required without using a pivot by connecting the base member and the mounting member in a chain shape, and it is possible to reduce the number of parts and facilitate assembly.

Embodiments of the present invention will be described below with reference to the drawings.
The stable installation tool 1 which concerns on this invention is attached to the edge part of the support | pillar which comprises leg parts, such as a ladder and a stepladder.
8 to 10, the stable installation tool 1 is attached to a ladder device 2 that can be used both as a stepladder and a ladder.

The ladder device 2 can be changed in posture to a ladder posture shown in FIG. 8, a stepladder posture shown in FIG. 9, and a folded posture shown in FIG. The ladder device 2 includes a pair of ladder bodies 3, and one end portions (upper parts) of the ladder bodies 3 are connected to each other via a connecting means 4.
The connecting means 4 includes a bracket 5 provided on the upper side surface of each ladder body 3 and a connecting shaft 6 that pivotally attaches end portions of the brackets 5 to each other. Each ladder body 3 is rotatable relative to each other around the connecting shaft 6, and the ladder device 2 can be changed to each posture of a stepladder posture, a ladder posture, and a folded posture by rotating the ladder body 3. It has become. A top plate 7 is provided at the upper end of the ladder body 3.

A regulating member 8 that regulates the position of the ladder body 3 in the stepladder posture is provided on the side surface of the ladder body 3. When changing from the stepladder posture to the ladder posture, one end of the regulating member 8 is connected to the ladder It can be removed from the body 3 to release the regulation.
The ladder body 3 includes a pair of left and right columns 10 and a plurality of upper and lower bars 11 that connect the left and right columns 10, and the stable installation tool 1 is attached to one end (lower end) of the column 10. ing. The column 10 has a pair of left and right column bodies 12 connected by the crosspieces 11 and a slide column 13 attached to the column body 12 so as to be slidable in the longitudinal direction. In the following, the horizontal direction (the direction indicated by the symbol X in FIG. 8) along the longitudinal direction of the crosspiece 11 connecting the left and right columns 10 is referred to as the left-right direction X, and the horizontal direction (in FIG. 8) The paper surface penetration direction) is referred to as the front-rear direction Y (see FIGS. 9 and 10).

As shown in FIGS. 1 and 2, the column main body 12 has a rectangular tube shape, and the slide column 13 can be inserted from one end thereof.
As shown in FIGS. 1, 2, and 6, the slide column 13 has a cylindrical body 14 that can be inserted into the column body 12. The cylindrical body 14 is provided with a fixing plate 15 for fixing the slide column 13 to the column body 12 at a predetermined position. A mounting recess 17 for mounting the fixing plate 15 is provided on the inner surface of the cylindrical body 14 in the left-right direction. The fixing plate 15 is fitted in the mounting recess 17 and is fixed by a fixing means 18 such as a rivet. It is being fixed to the said cylindrical body 14 by.

The fixing plate 15 is provided with a plurality of protrusions 19 at intervals in the longitudinal direction. On the other hand, each column 10 is engaged with the protrusions 19 to fix the slide column 13. Is provided.
As shown in FIG. 1, the fixture 20 has a plurality of protrusions 21 that can be fitted between the protrusions of the fixing plate 15. The fixture 20 can fix / unfix the slide column 13 with respect to the column main body 12 by fitting / releasing the projection 21 between the projections 19 of the fixing plate 15. Yes. In a state in which the fixing tool 20 releases the fixing of the slide column 13, the slide column 13 is slidable along the longitudinal direction thereof, whereby the length of the column 10 can be changed.

As shown in FIGS. 1 to 7, the stable installation tool 1 includes a base member 23 that can be grounded, and an attachment member 24 that attaches the base member 23 to the column 10. Here, “grounding” means not only contacting the ground but also contacting any surface (including an inclined surface) on which the stable installation tool 1 is installed, such as a wall surface or a tread surface of a staircase.
The base member 23 is made of synthetic resin (for example, made of nylon), and includes a disk-shaped base portion 26 and an engaging portion 27 that engages with the mounting member 24. A non-slip member 28 (for example, made of a thermoplastic elastomer) is provided on the back side of the base portion 26. A hole 29 penetrating in the thickness direction is formed in the center of the base portion 26, and a protrusion 30 is formed in the anti-slip member 28 so as to be inserted into the hole 29 and project from the surface side of the base portion 26. Yes.

The engaging portion 27 of the base member 23 is formed on the surface (upper surface) side of the base portion 26, and has a circular cross section (including a U shape or a V shape). An opening 32 through which the mounting member 24 is inserted is formed between the engaging portion 27 and the base portion 26.
As shown in FIG. 5, the attachment member 24 is made of, for example, aluminum die casting and is formed in a substantially U shape. The attachment member 24 has an attachment portion 33 for attaching the base member 23 to the column 10 by being coupled to the engaging portion 27 in the middle of the attachment member 24, and for fixing the attachment member 24 to the column 10 at an end portion thereof. A fixing portion 34 is provided. The attachment portion 33 is circular in cross section and formed in an arc shape, and the fixing portion 34 is formed at each end portion of the attachment member 24 to form a pair. Each fixing portion 34 is formed to face each other.

  Each of the fixed portions 34 has a plate portion 35 formed wider than the attachment portion 33 and a protrusion 36 formed so as to protrude from the plate portion 35 in an opposing manner. As shown in FIGS. 6 and 7, on both side surfaces in the left-right direction X of the slide column 13, recessed strip portions 37 are formed along the longitudinal direction, and the protruding portions 36 are formed on the recessed strip portions 37. Is designed to fit. Further, a hole for inserting a bolt or the like is formed in the fixing portion 34 so as to penetrate in the plate thickness direction of the plate portion 35.

  The attachment member 24 is provided with a restricting means 39 for restricting the attachment member 24 that pivots to the side of the engagement portion 27 (left-right rotation) around the engagement portion 27 of the base member 23. Yes. The restricting means 39 includes a protruding portion 40 provided between the engaging portion 27 and the base portion 26 of the base member 23. The projecting portion 40 has a plate shape and projects from the surface of the base member 23 toward the base end portion of the engaging portion 27. The protrusions 40 are formed at the base end portions of the engaging portions 27 to form a pair, and the protrusions 40 are formed to face each other.

The upper part of the protrusion 40 is formed in a bent shape so as to protrude outward from the surface of the engagement part 27 having a circular cross section, whereby the side of the slide column 13 is formed on the upper part of the protrusion 40. An abutment surface 40a is formed to abut against the. A rib 41 is formed on the outer surface side in the opposing direction of the protrusion 40 so as to intersect the protrusion 40.
The mounting member 24 has a fixing portion 34 at one end thereof inserted into the opening 32 of the base member 23, and each fixing portion 34 is connected to one end portion (lower end portion) of the slide column 13 by fastening means 42 such as a bolt and a nut. It is attached to the slide column 13 by being fixed via. A spacer 43 is provided between the mounting member 24 and the slide column 13, and the spacer 43 is made of a plate material configured in an L shape in side view.

As described above, the stable installation tool 1 can be assembled with only two parts, that is, the base member 23 and the mounting member 24, and the two can be simply connected by simply inserting the mounting member 24 through the opening 32 of the base member 23. it can. Therefore, the stable installation tool 1 can reduce the manufacturing cost by reducing the number of parts as much as possible, and can easily assemble it.
When the stable installation tool 1 is attached to the slide column 13, the attachment portion 33 of the attachment member 24 is chain-coupled with the engagement portion 27 of the base member 23. Here, “chain” means a state in which the attachment portion 33 of the attachment member 24 and the engagement portion 27 of the base member 23 intersect at least. In particular, in this embodiment, in a state where the stable installation tool 1 is attached to the column 10, the attachment member 24 and the spacer 43 constitute an annular portion, and the base portion 26, the engagement portion 27, and the protrusion portion 40 of the base member 23. An annular part is constituted by and, and these chain parts are joined to form a chain bond.

  In FIG. 1, the attachment member 24 is attached to one end of each column 10 such that the center of the engaging portion 27 of the base member 23 faces the left-right direction X of the ladder body 3. Here, “the center is directed in the left-right direction X” means that the tangent line B drawn at the apex of the center axis L (curve L shown in FIG. 1) of the engaging portion 27 is directed in the left-right direction X. Means that it can be rotated around the tangent line B.

  As described above, the attachment portion 33 of the attachment member 24 has an arc shape, and the engagement portion 27 of the base member 23 has a circular cross section. The joint portion 27 can smoothly rotate along the direction of the arc of the attachment portion 33 of the attachment member 24. The rotation of the base member 23 is a rotation in the front-rear direction Y with reference to the ladder body 3 (hereinafter, this rotation is referred to as a front-rear rotation). The front and rear of the stable installation tool 1 is rotated around the engaging portion 27 (around the central axis M of the mounting portion 33). The front / rear rotation angle is about 90 ° on both sides (front / rear) of the axis N of the slide column 13.

  Further, the mounting portion 33 of the mounting member 24 is formed in a circular cross section, the cross section thereof is circular, the peripheral edge thereof is formed in an arc shape, and the engaging portion 27 of the base member 23 is formed in an arc shape. Therefore, the engaging portion 27 of the base member 23 can smoothly rotate along the arc direction. In other words, the base member 23 can rotate around the central axis M of the mounting portion 33 (or the cross-sectional center O of the mounting portion 33). The rotation of the base member 23 is the rotation of the ladder body 3 in the left-right direction X with reference to the ladder body 3 (hereinafter, this rotation is referred to as the left-right rotation).

  Thus, the base member 23 can be rotated back and forth even in a state where the base member 23 is rotated left and right. That is, the base member 23 is regulated by the regulating means 39 from the neutral position shown by the solid line in FIG. 1 (referred to as the position when the center line Z of the circular base portion 26 of the base member 23 faces the vertical direction). The mounting portion 33 can be rotated to the left and right sides (left and right rotation) within a rotation range up to a position (a position of the base member 23 indicated by a two-dot chain line in FIG. 1).

The mounting member 24 rotates when the base member 23 rotates left and right around the mounting portion 33 (centering on the central axis M of the mounting portion 33) to the side of the mounting portion 33. The base member 23 at an arbitrary position within the range is allowed to rotate back and forth around the engaging portion 27 (centering on the central axis L of the engaging portion 27).
Therefore, the stable installation tool 1 can rotate the base member 23 in all directions and can be grounded on all surfaces.

  Furthermore, since the attachment portion 33 and the engagement portion 27 are formed in an arc shape that contacts each other on an arc surface, the base member 23 can be largely rotated in any direction. Here, the “arc shape in contact with the arc surface” means that the mounting portion 33 formed in a circular cross section and the surface along the circumferential direction of the engaging portion 27 are formed in an arc shape (U shape). It means that the portion 33 and the engaging portion 27 are formed continuously in the arc direction.

  In FIG. 1, when the base member 23 rotates left and right, the contact surface 40 a of the restricting means 39 is brought into contact with the side surface of the slide column 13 when the base member 23 rotates a predetermined angle in the arc direction of the engaging portion 27. Abutting, thereby restricting the rotation of the base member 23. The restricting means 39 is the maximum rotation of the base member 23 around the engaging portion 27, in other words, around the central axis N of the slide column 13 toward both sides (left and right direction X) of the engaging portion 27. The angle can be set smaller than 90 °. In this embodiment, the case where the maximum rotation angle of the base member 23 is about 50 ° is illustrated. Thus, by providing the restricting means 39 on the base member 23, it is possible to prevent the base member 23 from rotating more than necessary.

The base member 23 is provided with posture holding means 44 for holding the posture of the base member 23 with respect to the mounting member 24. The posture holding means 44 includes the protruding portion 30 protruding from the central portion of the base member 23 to the surface side. The projecting portion 30 is in contact with the mounting portion 33 that is chain-coupled to the engaging portion 27.
The protruding portion 30 is in contact with the mounting portion 33 in a slightly elastically deformed state, and the posture of the base member 23 is maintained through a frictional force with the protruding portion 30. In this state, the posture of the base member 23 can be changed by applying a force to the base member 23 that is greater than the frictional force acting on the attachment portion 33 and the protrusion 30 due to the elastic force. As described above, by providing the posture holding means 44 to the base member 23, the posture of the base member 23 is held even when the stable installation tool 1 is separated from the ground surface when the ladder device 2 is moved. This is convenient when the stable installation tool 1 is grounded again.

  As shown in FIG. 10, when the ladder device 2 is in the folded position, the stable installation tool 1 provided on one ladder body 3 and the stable installation tool 1 provided on the other ladder body 3 are connected to each other in the front-rear direction. The base members 23 can be rotated inward by about 90 ° so that the back surfaces of the base members 23 are in contact with each other. In this way, when the ladder device 2 is in the folded position, the stable installation tool 1 does not get in the way and is convenient for storage and carrying.

In addition, this invention is not restricted to said embodiment, The following deformation | transformation and change are possible.
For example, the base portion 26 of the base member 23 is not limited to a disc shape, and may have a ground contact area sufficient to support the ladder body 3, and may be a polygonal shape such as a quadrangle, an ellipse, or other various shapes. It may be. The support column 10 is not limited to a rectangular tube shape, but may be formed in a polygonal tube shape, a cylindrical shape, or the like. The material of the anti-slip member 28 is not limited to the thermoplastic elastomer, and other various elastic materials may be used. The mounting member 24 is not limited to aluminum die casting, and can be formed using other various metals, resins, and the like. The base member 23 is not limited to synthetic resin, and may be made of metal. .

The ladder device 2 is not limited to one in which a pair of ladder bodies 3 are connected, for example, a structure in which three or more ladder bodies 3 are connected, or a scaffolding plate is connected between a pair of ladder bodies 3. The ladder device 2 may be a scaffolding base, and the ladder device 2 includes the stable installation tool 1 to ensure a stable working posture.
Further, the posture holding means 44 can use, for example, a coil spring or other elastic body other than the protrusion 30. In this case, a concave portion is formed in the center portion on the surface side of the base portion 26 of the base member 23, and one end portion of an elastic body (coil spring) is fitted and fixed in the concave portion, and the other end portion is brought into contact with the attachment portion 33. Thus, the posture of the base member 23 can be maintained.

It is a front view of the stable installation tool which concerns on embodiment of this invention. It is a side view of a stable installation tool. It is a front fragmentary sectional view of a base member. It is a top view of an attachment member. It is a side view of an attachment member. It is a side view which shows a slide support | pillar and a stable installation tool. It is an AA arrow line sectional view of Drawing 6. It is a front view which shows the ladder apparatus which became the ladder attitude | position. It is a side view of the ladder apparatus which became the stepladder posture. It is a side view of the ladder apparatus which became the folding attitude | position.

DESCRIPTION OF SYMBOLS 1 Stable installation tool 2 Ladder apparatus 3 Ladder body 4 Connection means 10 Support | pillar 11 Crosspiece 23 Base member 24 Attachment member 27 Engagement part 33 Attachment part 39 Restriction means 44 Attitude maintenance means

Claims (6)

An engaging portion (27) is formed on the upper surface of the groundable base member (23), and the engaging member (27) of the base member (23) is connected to the mounting member (24) attached to the support column (10). There is a mounting part (33) to be joined ,
The base member (23) is provided with restriction means (39) for setting the maximum rotation angle of the base member (23) rotating along the arc direction of the engagement portion (27) to be smaller than 90 °. stabilizing the accessory, characterized in that there.   The stable installation tool according to claim 1, wherein the engagement portion (27) and the attachment portion (33) are formed in an arc shape in contact with each other on an arc surface.   When the base member (23) is rotated to the side of the mounting portion (33) around the mounting portion (33), the mounting member (24) is moved from the rotated state to the engaging portion. The stable installation tool according to claim 1 or 2, wherein the base member (23) is allowed to rotate around (27).   The base member (23) is provided with posture holding means (44) for holding the posture of the base member (23) with respect to the mounting member (24). The stable installation tool as described in. A ladder body (3) provided with the stable installation tool (1) according to any one of claims 1 to 4, wherein a pair of left and right columns (10) and a plurality of upper and lower columns (10) are connected to each other. The mounting member (24) is connected to one end of each column (10) so that the center of the engaging portion (27) of the base member (23) faces the left-right direction of the ladder body. A ladder body characterized by being attached to the section. A ladder apparatus comprising the ladder bodies (3) according to claim 5 as a pair, wherein one end portions of the ladder bodies (3) are connected to each other via a connecting means (4).

Images