CN200975209Y

CN200975209Y - Bearing strip apparatus

Info

Publication number: CN200975209Y
Application number: CN 200620147892
Authority: CN
Inventors: 真田英敏
Original assignee: Pica Corp
Current assignee: Pica Corp
Priority date: 2005-12-13
Filing date: 2006-12-07
Publication date: 2007-11-14
Anticipated expiration: 2016-12-07
Also published as: JP2007162315A; JP4652965B2

Abstract

To reduce time for setting work and to support a large load. This pad comprises a pad member 8 having an abutting surface 13; a cover member 9 mounted to the pad member 8 to support a ball 10; a mounting bolt 11 mounted to the ball 10; and a neutral resetting means 12 for resetting the mounting bolt 11 vertically from a swung position with respect to the abutting surface 13. The mounting bolt 11 penetrates the ball 10, and its head 34 is formed into a spherical surface. The pad member 8 is formed with a spherical receiving face 14 receiving the head 34 of the mounting bolt 11.

Description

Cushion device

Technical field

The utility model relates to the accessory of the equipment of similar band spikes such as ladder, step stool, operation post, scaffold, desk, chair, especially a kind of cushion device (or claiming to stablize tool or pin ware) that is installed on its spike (comprise up, towards the spike of inferior all directions position upper support) end.

Background technology

As everyone knows, step stool, operation post, desk etc. are similar to the spike equipment supported, in use all need support by spike.In order to prevent that spike from slippage taking place when supporting, the spike end usually is sheathed with the cushion device that rubber and so on increases friction factor.But variation because of working environment; the angle that supports ground changes through regular meeting; for adapting to this situation, but the univesal padding device of free adjustment angle afterwards just occurred, wherein representatively seen Japanese documentation: real flat 6-47600 communique and the Te Kai 2002-339678 communique opened.

Open real that disclosed patent scheme is in the flat 6-47600 communique: a cushion device by liner component, be installed in the outer cover part on the liner component and the ball that is clamped between described liner component and the outer cover part constitutes, this ball and spike end are connected, ball cooperates with the liner component sphere, cushion device can freely be rotated with respect to ball, even the perk of feet deflection also can be guaranteed the stable carrying of ladder.But it also has the following disadvantages: in use cushion device can not restore to the original state after rotating automatically, uses the state that needs the manual setting cushion device when setting up in next time, and operation is set up more consuming time and trouble.

Open the spy that disclosed patent scheme is in the 2002-339678 communique: a cushion device is made of fixed part, support unit and bias component; Fixedly connected with the spike end in the upper end of fixed part, the support unit top is provided with a hollow spherical projection, its central part is provided with through hole, the end of fixed part is placed through in this through hole, with this support unit can freely be rotated and swing in all directions, and between the inner face that is placed through end in the ball bumps and ball bumps of fixed part, be provided with spring as bias component, setting by bias component can make support unit return to neutral condition under free state, and this neutral condition promptly is the state of the vertical and intersectant centerline of the face that touches of support unit and fixed part.But, the cushion device of this structure in use also exists one, and comparatively serious defective---load carrying is poor, during pressurized, load on the equipment such as ladder all can through fixed part concentrate on support unit the ball bumps top end surface a bit on, follow impact that product falls maybe when load exceeds anticipation when having applied on the equipment such as ladder, support unit ball bumps top will be out of shape even be damaged.

Summary of the invention

The utility model is for solving the problem that above prior art exists, and to set up operation and improve the support load ability be target simplifying, and a kind of new-type cushion device structure is provided.

For achieving the above object, the technical solution adopted in the utility model is: a kind of cushion device, comprise liner component, be installed in the outer cover part that has peristome on the liner component and be clamped in ball between described liner component and the outer cover part with the face of touching, innovative point is: have a hold-down screw to run through the ball center from the liner component side ball is fixedly connected on the spike end, constitute fixture with this hold-down screw and ball, and liner component and outer cover part constitute swing component; Described hold-down screw is provided with a sphere towards the head of liner component, and the corresponding dome shape bearing surface that cooperates with sphere that is provided with on the liner component; And effect has one can make it be reset to hold-down screw central axis and the reset assembly that touches the perpendicular neutral condition of face from swing state between fixture and swing component.

Related content in the technique scheme is explained as follows:

1, in the such scheme, the peristome of described outer cover part is provided with the supporting surface that a circle cooperates with the ball outside surface sphere, the sphere centre of the sphere centre of this supporting surface and described dome shape bearing surface coincides, but the sphere curvature radius of supporting surface is advisable for a short time than the sphere curvature radius of described dome shape bearing surface.Because the sphere centre of supporting surface and the sphere centre of described dome shape bearing surface coincide, supporting surface and dome shape bearing surface can the while rotational support fixture like this, and, because of the sphere curvature radius of supporting surface littler than the sphere curvature radius of described dome shape bearing surface, so just reserved the position of placing reset assembly, made the assembling of reset assembly more easy.Above-mentioned ball can be a complete spheroid, also can be the part spheroid that an end-grain cutting is fallen.

2, in the such scheme, it is a helical spring that described reset assembly has following two kinds of concrete preferred configuration scheme: a, reset assemblies, it is enclosed within on the ball, and act between hold-down screw head and the outer cover part, and this helical spring is a Spring capable of diameter varying, respectively saves the trend of the line of outer rim between the turn on its length direction and is advisable along the direction of the external surface of ball, with the effect of spring force, make free state lower liner device can be reset to neutral condition voluntarily; B, described reset assembly are by constituting with the relative pair of magnets of opposite sex end, wherein a magnet is arranged on described hold-down screw head place, another magnet correspondence is installed in the middle part of described liner component, with the effect of magnetic force, makes free state lower liner device can be reset to neutral condition voluntarily.

The utility model is when use is stressed, shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 4 and accompanying drawing 5, liner component 8 just contacts with the head 34 of hold-down screw 11 and offsets bearing load, and because of both be with sphere to the face of sphere and contacting of face, so bearing capacity increases; And the supporting surface 28 on the outer cover part 9 has also played supporting role to ball 10, and it bears part load, and then support load ability of the present utility model is further improved.And, because of having designed reset assembly 12, make free state lower liner device be reset to neutral condition voluntarily, simplified and set up operation process.

In sum, the utility model compared with prior art has following advantage:

1, because the utility model is provided with reset assembly, under free state, can return to neutral condition voluntarily, need not before each operation is set up the manual setting cushion device touch face towards, simplified job step.

2, because the utility model contacting by face between liner component and the hold-down screw and face to carry bigger load, and, also have supporting surface to share load with cooperating of ball outside surface, make the utility model compared with prior art the ability of support load significantly improve, in heavy load and be subjected to also to be difficult for causing the damage of cushion device under drop type impacts.

Description of drawings

Accompanying drawing 1 is the structural representation one of the utility model embodiment one, represents neutral condition among the figure;

Accompanying drawing 2 is the structural representation two of the utility model embodiment one, represents swing state among the figure;

Accompanying drawing 3 is the helical spring schematic diagram that is provided with of the utility model embodiment one;

Accompanying drawing 4 is the structural representation one of the utility model embodiment two, represents neutral condition among the figure;

Accompanying drawing 5 is the structural representation two of the utility model embodiment two, represents swing state among the figure;

Accompanying drawing 6 is a whole generalized schematic of having used the ladder of the utility model cushion device;

Accompanying drawing 7 is to have used the user mode of setting up of the ladder of the utility model cushion device that schematic diagram is described.

In the above accompanying drawing: 1, cushion device; 2, ladder; 3, pillar; 4, step treadle; 5, lower pad device; 6, upper liner device; 7, plectane portion; 8, liner component; 9, outer cover part; 10, ball; 11, hold-down screw; 12, reset assembly; 13, touch face; 14, dome shape bearing surface; 15, go up laying; 16, lower liner layer; 17, tubular rivet; 18, through hole; 20, upper process portion; 21, peristome; 22, protrusion; 23, through hole; 24, lower process portion; 25, neck; 26, flange portion; 27, inclined plane; 28, supporting surface; 29, helical spring; 30, magnet; 31, magnet; 32, cylindrical portion; 33, recess; 34, the head of hold-down screw; 34a, sphere; 35, conus portion; 36, through hole; 37, dome shape portion; 38, mating face; 39, iron plate; L, respectively save the line of turn outer rim; P, the centre of sphere; W, ground plane; R1, radius of curvature (supporting surface and dome shape portion); R2, radius of curvature (sphere and dome shape bearing surface); X, vertical centering control vertical shaft line; The central axis of Y, hold-down screw; δ, angle of oscillation.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment one: shown in Fig. 6,7, cushion device 1 of the present utility model is used for the schematic configuration of the example of ladder 2.Described ladder 2 is by pair of right and left ladder pillar 3 and be erected at two multistage step treadles 4 between the ladder pillar 3 and constitute.As shown in Figure 7, vertically place this ladder 2, can on above-mentioned two ground plane W, firmly install according to different angles respectively for one jiao that intersects at two ground plane W.

The lower pad device 5 that can tackle the concavo-convex of ground plane W and tilt to freely swing is installed in the bottom of aforementioned two ladder pillars 3, the upper liner device 6 that the inclination that can tackle ground plane W freely swings is installed in the upper end of two ladder pillars 3, and above-mentioned lower pad device 5 and upper liner device 6 have all adopted cushion device 1 of the present utility model.

Referring to Fig. 1～shown in Figure 3, the cushion device 1 of aforementioned present embodiment by the bottom surface be the face that touches 13 liner component 8, be installed in the outer cover part 9 that liner component 8 upper tops have peristome 21, a ball 10 and a hold-down screw 11 that is clamped between described liner component 8 and the outer cover part 9 constitutes.

Described hold-down screw 11 runs through ball 10 centers from liner component 8 sides ball 10 is fixedly connected on spike end (being on the upper end or bottom of pillar 3), constitute fixture with this hold-down screw 11 and ball 10, and liner component 8 constitutes swing component with outer cover part 9; Described hold-down screw 11 convexes with a sphere 34a on the head 34 of liner component 8, and the corresponding dome shape bearing surface 14 that is provided with an indent on the liner component 8, the sphere 34a of hold-down screw head 34 matches with described dome shape bearing surface 14; And, effect has one can make fixture and swing component be reset to the reset assembly 12 of neutral condition from swing state between fixture and swing component, this neutral condition is meant the state (being that hold-down screw central axis Y and vertical centering control vertical shaft line X coincide the state when angle of oscillation δ is zero degree) that hold-down screw central axis Y is perpendicular with touching face 13.

The concrete structure of above-mentioned liner component 8 is: liner component 8 is made of stacked up and down last laying 15 and lower liner layer 16, and last laying 15 is made of hard resin, encloses lug by one of the plectane portion 7 at a middle part and periphery and constitutes; The middle position of described plectane portion 7 becomes crowned, forms the dome shape bearing surface 14 of above-mentioned indent in the position of the cardinal principle central authorities of this bump, establishes a plurality of through holes 18 at the peripheral part of plectane portion 7.And lower liner layer 16 is made of soft synthetic resin, and it is embedded in the bottom of laying 15, and forms the face that touches 13 that touches ground on its soffit.

The concrete structure of above-mentioned outer cover part 9 is: outer cover part 9 is provided with flange portion 26, form the protrusion 22 of spin shape (being roughly the teacup shape) at the middle position of flange portion 26, at the prominent through hole 36 of establishing the through hole 18 of laying 15 on a plurality of correspondences of the peripheral part of flange portion 26.Be inserted into this through hole 36 and through hole 18 with tubular rivet 17, utilize tubular rivet 17 fixing (fastening connection) flange portion 26 and last laying 15.

Described protrusion 22 is made of the cylindrical portion 32 of giving prominence to from flange portion 26 and the conus portion 35 on top, and protrusion 22 inside are hollow; Outer cover part 9 is enclosed within the cavity of its protrusion 22 on the bump in the plectane portion 7 of laying 15, and, form peristome 21 in the top side of conus portion 35.The inboard of aforementioned protrusion 22, and the dome shape bearing surface 14 of aforementioned liner component 8 between form and be roughly spherical space, and 10 trips of aforementioned ball are embedded in this space.

The peristome 21 of described outer cover part 9 is provided with the supporting surface 28 that a circle cooperates with ball 10 external surface spheres, this supporting surface 28 is one to be the sphere at center with centre of sphere P, and, on the top ports of peristome 21, also has a circle inclined plane 27, this inclined plane 27 forms horn mouth with the oblique outside, certain angle of slope with this at peristome 21 places.

Aforementioned ball 10 specifically be the shape of cutting away the dome shape portion 37 that forms after the size of its downside about 1/4th by a spheroid, and, the upside of dome shape portion 37 is equipped with a upper process portion 20, pleurapophysis is set jut 24 under it, runs through the through hole 23 that is provided with through centre of sphere P from upper process portion 20 to lower process portion 24.

During assembling, be from the downside of outer cover part 9 ball 10 to be embedded, the centre of sphere P of ball 10 and the centre of sphere P of supporting surface 28 are coincided, 28 of dome shape portion 37 and supporting surfaces contact cooperation with face.Be supporting surface 28 to be with centre of sphere P with dome shape portion 37 be the center, the sphere of identical radius of curvature R 1.

The side face of aforementioned upper process portion 20 is provided with by the pieceable mating face 38 of fastened tools (spanner, wrench etc.); The bottom of aforementioned lower process portion 24 is provided with the recess 33 that the cross section is triangle, quadrangle, pentagon an or the like horn shape.And fixed screw 11 is provided with the neck 25 of the horn shape of cross section and recess 33 couplings at the upside of head 34.The neck 25 of fixed screw 11 lower ends embeds in the recess 33 of lower process portions 24, and its middle part connects through hole 23, upper end side protrude in aforementioned upper process portion 20 above, and its top is fixed on the ladder pillar 3.

The top of the head 34 of aforementioned fixation screw 11 is a

sphere

34a, 14 of this sphere 34a and dome shape bearing surfaces and face coupling touch, and the load that ladder pillar 3 applies during use is to be delivered to contacting of face on the liner component 8 with the face of dome shape bearing surface 14 through the head sphere 34a of hold-down screw 10.The centre of sphere P that dome shape bearing surface 14 and sphere 34a are ball 10 be the center and radius of curvature be the sphere of R2.Though the size of aforementioned radius of curvature R 1 and the radius of curvature R 2 here can be identical, in order to be easier to arrangement reset assembly 12, the radius of curvature R 2 of dome shape bearing surface 14 should design greatlyyer than the radius of curvature R 1 of supporting surface 28.

In the use, during fixture (being ball 10 and hold-down screw 11) swing, when the side face of the upper process portion 20 of ball 10 and inclined plane 27 touch, as shown in Figure 2, be hold-down screw 11 central axis Y and through between the vertical centering control vertical shaft line X of centre of sphere P angle---angle of oscillation δ has reached top limit, so promptly be by jut 20 and inclined plane 27 engagement limits the pendulum angle of fixture (being ball 10 and hold-down screw 11), pendulum angle is limited under the top limit.

Shown in accompanying

drawing

1,2,3, aforementioned reset assembly 12 is a helical spring 29, it is enclosed within on the ball 10, and one end be fixed on the hold-down screw head 34, the other end is fixed on the medial surface of outer cover part 9, and this helical spring 29 is set to: this helical spring 29 is Spring capable of diameter varying, it presents helical form along the outer peripheral face of aforementioned dome shape portion 37, respectively saves the direction of the line L of outer rim between the turn along the external surface of ball 10 on its length direction.Be not subjected at this helical spring 29 under the free state (neutral condition) of external force effect, it is along being provided with the aforementioned perpendicular direction of face 13 that touches.

Shown in accompanying

drawing

2,3, said spiral spring 29 is rendered as helical form along the outer peripheral face of aforementioned dome shape portion 37, though even helical spring 29 can be flexible under the swing state of ball 10, but it can not produce the swing of ball 10 and disturb, and this helical spring 29 can apply constant neutral reset force to ball 10.

Operation at present embodiment is illustrated below:

Present embodiment cushion device 1 is not when touching to ground plane W, and cushion device 1 presents neutral condition, i.e. the state of its fixed screw 11 and the face that touches 13 perpendicular (be fixed screw 11 and vertical centering control vertical shaft X by centre of sphere P coincides).

As shown in Figure 1, when ladder pillar 3 was vertically installed in ground plane W, aforementioned fixation screw 11 was with to touch face 13 perpendicular, and the load that applies from ladder pillar 3 is passed to 14 carryings of dome shape bearing surface by the sphere 34a of the head 34 of fixed screw 11.Dome shape bearing surface 14 derives from whole loads of ladder pillar 3 by face contact carrying, so compares with a prior art that contacts, and can carry bigger load.

As shown in Figure 2, when the relative fixture that is connected with ladder pillar 3 of swing component of cushion device 1 has been swung angle of oscillation δ, be between the central axis Y of hold-down screw 11 and vertical centering control vertical shaft line X one angle to be arranged---during angle of oscillation δ, the sphere 34a of the head 34 of fixed screw 11 still contacts cooperation with 14 of dome shape bearing surfaces.Derive from the load on the ladder pillar 3, most of by liner component 8 carryings, fraction is by outer cover part 9 carryings.

Shown in accompanying drawing 2, under swing state, swing along with the wallowing motion of fixed screw 11 end that is positioned at head 34 sides of said spiral spring 29, helical spring 29 promptly can produce a biasing reset force to fixed screw 11, therefore when the face that touches 13 1 of cushion device 1 leaves ground plane W, the swing component in the cushion device 1 promptly can revert to neutral condition automatically under the effect of the recuperability of helical spring 29.

In the such scheme, the radius of curvature R 2 of the sphere 34a of dome shape bearing surface 14 and fixed screw 11 with the centre of sphere P of ball 10 be the center and with radius of curvature R 1 identical being advisable of ball 10.Also can make the center of curvature (centre of sphere P) and the radius of curvature of the sphere 34a of fixed part 11 and dome shape bearing surface 14, supporting surface 28 different, also can form conical supporting surface 28.

The shape of each parts and all around separately, the relation of position up and down are the best as Fig. 1～shown in Figure 3 being configured in the present embodiment, but are not limited to aforementioned example, also can carry out various changes to parts, formation when specifically producing.

The described cushion device 1 of present embodiment is to be used in for example on the ladder pillar 3, can also be used for the feet end that step stool, footstool, operation post, chair, desk, scaffold etc. similarly have the equipment of feet in actual applications certainly.

Embodiment two: shown in accompanying drawing 4, accompanying drawing 5, a kind of cushion device 1 by the bottom surface be the face that touches 13 liner component 8, be installed in the outer cover part 9 that liner component 8 upper tops have peristome 21, a ball 10 and a hold-down screw 11 that is clamped between described liner component 8 and the outer cover part 9 constitutes; Be with the difference of embodiment one:

Shown in accompanying drawing 4, accompanying drawing 5, reset assembly 12 in the cushion device 1 is by constituting with the relative pair of

magnets

30,31 of opposite sex end, wherein first magnet 30 is arranged on described hold-down screw head 34 places, and second magnet, 31 correspondences are installed in the middle part of described liner component 8.Specifically: the downside of the dome shape portion 37 of aforementioned ball 10 is provided with recess 33, first magnet 30 is a ring-type, it is set on the neck 25 of hold-down screw 11, magnet 30 is fixed in the recess 33 by hold-down screw 11 with this, its top is embedded and is hidden in the recess 33, and the bottom is exposed on the lower end of ball 10.And second magnet 31 is placed with aforementioned first magnet, 30 subtends, and it and iron plate 39 are together buried underground between supreme laying 15 and the lower liner layer 16.This second magnet 31 also is ring-type, and its annular center is set on the vertical centering control vertical shaft X.When fixed screw 11 was in neutral condition, the distance between first magnet 30 and second magnet 31 was the most approaching, even therefore fixed screw 11 swings, the effect of the attraction by magnet still can make fixed screw 11 and ball 10 be reset to neutral condition.

Other repeats no more here with embodiment one.

The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model spirit essence change or modify, and all should be encompassed within the protection domain of the present utility model.

Claims

1, a kind of cushion device, comprise have the face of touching [13] liner component [8], be installed in the outer cover part [9] that has peristome [21] on the liner component [8] and be clamped in described liner component [8] and outer cover part [9] between ball [10], it is characterized in that: have a hold-down screw [11] to run through ball [10] center ball [10] is fixedly connected on the spike end from liner component [8] side, constitute fixture with this hold-down screw [11] and ball [10], and liner component [8] constitutes swing component with outer cover part [9]; Described hold-down screw [11] is provided with a sphere [34a] towards the head [34] of liner component [8], and the last correspondence of liner component [8] is provided with a dome shape bearing surface [14] that cooperates with sphere [34a]; And effect has one can make it be reset to hold-down screw central axis [Y] and the reset assembly [12] that touches the perpendicular neutral condition of face [13] from swing state between fixture and swing component.

2, cushion device according to claim 1, it is characterized in that: the peristome [21] of described outer cover part [9] is provided with the supporting surface [28] that a circle cooperates with ball [10] external surface sphere, the sphere centre of sphere centre of this supporting surface [28] and described dome shape bearing surface [14] coincides, but the sphere curvature radius of supporting surface [28] is littler than the sphere curvature radius of described dome shape bearing surface [14].

3, cushion device according to claim 1 and 2, it is characterized in that: described reset assembly [12] is a helical spring [29], it is enclosed within on the ball [10], and act between hold-down screw head [34] and the outer cover part [9], and, this helical spring [29] is a Spring capable of diameter varying, respectively saves the direction of the line [L] of outer rim between the turn along the external surface of ball [10] on its length direction.

4, cushion device according to claim 1 and 2, it is characterized in that: described reset assembly [12] is by constituting with the relative pair of magnets of opposite sex end [30,31], wherein a magnet [30] is arranged on described hold-down screw head [34] and locates, and another magnet [31] correspondence is installed in the middle part of described liner component [8].