CN1250848C - Temporary structural parts for armrest - Google Patents

Abstract

The present invention provides a temporary structural part for an armrest in a wedge mode, which has optimal construction performance or good strength. Thus, the construction can be quietly carried out, and the present invention can become the temporary structural part for an armrest for a scaffolding (a workbench surface) of an eagle frame, etc. which has high safety. The present invention mainly utilizes an insertion part of a supporting column of the eagle frame (a work bench (frame)), etc. to install the structural part for an armrest, and is composed of horizontal material and oblique material formed from the one side end of the horizontal material extending towards an oblique direction; both ends of the horizontal material and the priori end of the oblique material have connecting structural parts, and each connecting structural part is composed of a claw hooking and clamping part and a wedge part, wherein the claw hooking and clamping part can be inserted relatively to the insertion part, and faces downwards; the wedge part penetrates through the upper surface of the hooking and clamping part in the longitudinal direction, and is beaten into the space between the claw part and the insertion part. In addition, the oblique material can be joined relatively to the horizontal material in a rotation mode.

Description

Temporary structural parts for armrest

Technical field

The present invention relates to framework type scaffold or on a small scale scaffold (work top) wait construct with scaffold or bracing frame (below general name " scaffold) on; in order to prevent the temporary structural parts for armrest that drops and install of operator or equipment, also have the structure of the oblique check rod of scaffold concurrently for purpose.

Background technology

For example, in construction work, around the basis, set up scaffold, falsework, particularly during the building more than building two floors, turn over accident, at scaffold handrail is set usually for what prevent operator or equipment.

Figure 14 illustrates its representational example.Built pillars 60 such as frame what construct scaffold 50 in the past ... 60 handrails of only installing by single tube became 70,70 ...Label 80 is the sheet frames (with the frame of plank) for operator walking, and the installing mechanism for pillar 60 of handrail 70 is used for being provided with at a pedestal type freely or the orthogonal type twin tong of the anchor clamps that a pair of gripping pipe uses more.

Above-mentioned handrail 70 in the past has following problem.First is the problem of relevant safety, and handrail 70 in the past is flatly to be set up in 60,60 on pillar, between the sheet frame 80,80 up and down one or two handrail 70 only is installed usually, therefore at this handrail 70 bigger coffin 90,90 is arranged up and down.And equipment etc. are easy to thus, and space 90 tumbles.

Second is the problem about the intensity of scaffold 50, that is, handrail 70 in the past often is mounted to level, does not therefore generally almost have check rod (oblique check rod) can bring into play functions such as reinforcement scaffold.In addition handrail 70 in the past is by above-mentioned twin tong and solid is installed on pillar 60 across mostly, therefore scaffold etc. can not be become frame construction fully, can't avoid shaking of scaffold etc.

Relate to the problem of application property at last.Handrail 70 in the past is to install with twin tong mostly.And twin tong need be locked bolt, so the application property that scaffold etc. is constructed is not good, in addition, in order more positively to prevent problems such as tumbling of equipment etc. and increase an interval handrail 70 quantity is set, more can encourage the deterioration of application property thus.

About this point, developed recently as shown in figure 15, with each skew 90 degree phase places ground in cubic welding pocket-like plug together the scaffolding-pole 100 of portion 101, and, also have the above-mentioned wedge portion that plugs together portion 101 that is inserted at two ends as handrail 110.And the handrail of this kind wedge mode need not use twin tong, and the portion that plugs together 101 that wedge portion is embedded in scaffolding-pole 100 just can finish the installation of handrail, and is therefore very simple.In addition, can not become graded crossing with scaffolding-pole like that as the handrail that uses twin tong, but can make arm rest and the same one side on adjacent 100 formed planes of scaffolding-pole on, therefore have the advantage of more high-intensity scaffold compared with the past.

Yet the handrail of this kind wedge mode also has following problem.The above-mentioned handrail that describes in detail is with mallet etc. this wedge portion directly to be knocked in the portion of plugging together 101 when mounted.And handrail in the past makes it be integral with welding with wedge portion at its two ends, and the mallet that is taken place when therefore knocking in wedge portion is beaten sound and directly made scaffolding-pole 100 or handrail vibration, and these hollow tubes normally, thus mallet beat sound within it portion vibe.The problem that noise takes place is arranged.Particularly in order to guarantee intensity, all parts all are metal systems, and the sonorant of this superelevation will propagate into far place, in very wide scope noise take place.

Summary of the invention

The present invention develops in order to solve above-mentioned whole issue, its objective is by further improvement in the wedge mode that has lot of advantages aspect application property or the intensity, can silently construct and the temporary structural parts for armrest of safe scaffold to provide.

In order to reach above-mentioned purpose, the present invention is the temporary structural parts for armrest (handrail is with setting up member) that employing utilizes the portion of plugging together of scaffolding-pole to install, by horizontal material, and constituted from the oblique material of the oblique extension of an end of this horizontal material, at the two ends of above-mentioned horizontal material and the front end of above-mentioned oblique material possess connecting elements arranged, this connecting elements be by: can be inserted in the above-mentioned fixing temporarily dogging portion that uses that plugs together the pawl of portion or dogging but have; And longitudinally above above-mentioned dogging portion and beaten being different wedge portion with horizontal material and constituting between above-mentioned pawl and the dogging portion.Tiltedly material prevents (protection) usefulness material except can be used for tumbling of equipment etc., also can become the oblique check rod of the oblique frame etc. of scaffold etc.So the present invention can be used for the handrail of oblique check rod (finishing strips).

In addition, installation of the present invention to as if, except the walking of the eminence of operator with the scaffold of tectosome, also can be used for the balcony, the isostructure support of platform of support of buildings etc.Yet the object of installation is not limited to this, for example, and when the object tectosome is when having the pillar of the portion of plugging together, between this is connected with temporary structural parts for armrest of the present invention can be installed certainly.

Employing with pawl towards the below, be easy to dogging portion temporarily fixing (fixing temporarily) in the portion that plugs together of pillar thus.

Employing with respect to the means that the horizontal material rotation is engaged freely, can make the superimposed in line folding of oblique material and horizontal material Zhe with oblique material thus.

When installing by the temporary structural parts for armrest of above-mentioned means, the floor of installing at needs carries out installation exercise basically.In other words, when desiring the present invention partly to be installed when establishing member temporarily in the second floor of scaffold etc., in fact operator needs to second floor the member of establishing temporarily of the present invention to be installed.

Relative, when making it the formation of handrail to be installed, just can carry out the installation exercise that the present invention establishes member temporarily safely for the floor below the floor that purpose is installed.In other words, when handrail being installed for second floor, be to carry out installation exercise from Stall, and when for the 3rd buildings handrail being installed, just carry out installation exercise from second floor, be the installation that superincumbent floor has been finished handrail, so operator needs to carry out the installation of handrail in regular turn for last floor with the state that is prevented from by handrail to fall.

In order to make it to become the handrail of type in advance, be to adopt: with respect to the other end that engages oblique material, with the rotatable setting of connecting elements of the end that does not engage oblique material of horizontal material.According to this during means, to install in regular turn: with horizontal material rotation connecting elements freely, the connecting elements of one square end of horizontal material, be the connecting elements that oblique material is installed at last, yet the installation of initial connecting elements is, it is rotary configured and can make horizontal material become direct state ground to implement for mat, in addition, next connecting elements also can simultaneously become level by the rotary configured horizontal material that makes, and one side can be installed.

Adopt:, be provided with the means that stopper is opened in the expansion that oblique material is remained in predetermined angular at the oblique junction surface of material and horizontal material.According to this during means, tiltedly material makes it to become the opening angle of the maximum of regulation.In addition, which angle predetermined angular is decided to be and can at random sets along with the interval of framework of mounting object etc.

In addition, adopt: the means that the reinforcement material of L word shape is set at oblique material.Can improve the function that the protection of equipment etc. falls therefrom.

Be that to be provided with the centre on oblique material be axle and rotatable reinforcement material, and this reinforcement material is provided with the insertion section that can insert with respect to the above-mentioned portion of plugging together, means except obtaining to protect the function that falls by the reinforcement material equally, are also contributed to some extent for the structural strength of scaffold according to this.

Moreover, particularly be installed on the temporary structural parts for armrest of the end of scaffold.In other words, the temporary structural parts for armrest that utilizes the plugging together portion of pillar of scaffold and install is by horizontal material, and about extending by the middle part of this horizontal material tiltedly the oblique material of below constitute, and each front end of the two ends of above-mentioned horizontal material and above-mentioned two oblique materials is the unitary construction that has connecting elements.What change is the formation of connecting elements do not have.

But optionally use the means that below dogging portion, are provided with the jaw portion of pillar butt again as above-mentioned connecting elements, thus, temporary structural parts for armrest temporary transient fixedly the time point-load meeting with respect to dogging portion disappeared, this load also can disperse and in jaw portion.

Description of drawings

Fig. 1 is the front view of the temporary structural parts for armrest of the 1st embodiment.

Fig. 2 is the amplification key diagram with the junction surface of oblique material.

Fig. 3 is the amplification profile with connecting elements.

Fig. 4 is the amplification front view with connecting elements.

Fig. 5 is other routine oblique view of the expression pillar that the present invention was suitable for.

Fig. 6 is other routine profile of the expression pillar that the present invention was suitable for.

Fig. 7 is the key diagram of the application examples of expression the 1st embodiment.

Fig. 8 is the front view of the temporary structural parts for armrest of expression the 2nd embodiment.

Fig. 9 is the front view of the temporary structural parts for armrest of expression the 3rd embodiment.

Figure 10 is the front view of the temporary structural parts for armrest of expression the 4th embodiment.

Figure 11 is the procedure chart about the installation order of the temporary structural parts for armrest of the 4th embodiment.

Figure 12 is the procedure chart about the installation order of the temporary structural parts for armrest of the 5th embodiment.

Figure 13 is the front view of the temporary structural parts for armrest of relevant the 6th embodiment.

Figure 14 is the key diagram of the scaffold of explanation prior art.

Figure 15 is the key diagram with pillar.

The specific embodiment

Below according to figure explanation the preferred embodiments of the present invention.Fig. 1 is the front view of the temporary structural parts for armrest of expression one embodiment of the invention.This temporary structural parts for armrest is to form by the oblique material 3 of installation that is the pine needle shape with the fixing junction surface 2 of waiting of rivet at a square end of horizontal material 1.In addition, one of two front ends of horizontal material and oblique material 3 end is provided with the connecting elements 4 with respect to pillar (building frame).

Moreover present embodiment is with the rivet with rotation joint construction freely oblique material 3 to be fixed in horizontal material 1, so when not using, oblique material 3 can be rolled over Zhe one-tenth and horizontal material 1 is gone up in line, in order to haulage or keeping.But the joint construction of bringing into play this folding Zhe function is not limited to rivet, and other known configuration such as bolt nut also can.

In addition, present embodiment is in order to limit the maximum opening angle of oblique material 3, and 2 are provided with to expand and open stopper 2a at the junction surface.This stopper 2a will have the periphery of the metal sheet of specific thickness to bestow processing, with welding etc. and be fixed in junction surface 2 and form.And the feature of its shape is, making its upper limb is linearity and as limited section 2b.With the horizontal material 1 of season with its continuous left and right sides edge, tiltedly a side who seizes the angle side on both sides by the arms (being right border among the figure) of material 3 makes circular-arc and allows the 2c of portion as rotation.When tiltedly material 3 was opened to maximum opening angle thus, the part of above-mentioned linearity limited section 2b and horizontal material 1 was interfered, and the expansion again that can limit oblique material 3 is opened.Open from This Side on the other hand state and make oblique material 3 folding Zhe when horizontal material 1 side, circular-arc rotation allow that the 2c of portion and horizontal material 1 do not interfere, and therefore can implement the spinning movement by the riveting pin of oblique material 3 not with hindering.

Therefore as mentioned above, present embodiment defines the maximum opening of oblique material 3, unexpectedly expands with oblique material 3 and opens to for example 90 when spending, and can prevent that its front end from brushing up against the operating personnel's of lower floor situation.Tiltedly material 3 is long than horizontal material 1, in addition, be set to longer than the interval of pillar, therefore in this case prevent that unexpected accident aspect is more effective.

On the other hand, the connecting elements 4 of present embodiment be be fixed in prior art illustrated to be fixed in the pillar 100 that the four directions is formed with the portion of plugging together 101 be prerequisite, have structure as shown in Figure 3.It is described in detail in detail, has by with respect to the portion that plugs together 101 insertions of pillar 100 or dogging and the section that can temporarily fix is the 4a of dogging portion of コ word shape, and be the different 4d of wedge portion with the 4a of this dogging portion.Be formed with the 4d of wedge portion above the 4a of dogging portion and can insert logical through hole 4b up and down.

In addition, the front end at the 4a of dogging portion is formed with the front end pawl 4c that can be inserted in the portion of plugging together 101.In addition, 4e is the hemispheric anti-delinking part of being located at the front end of the 4d of wedge portion, adopts the 4d of wedge portion be made to complicated variant to prevent constituting by above-mentioned through hole 4b accidental.

In addition, in figure, 4f is the jaw portion that is provided with according to the lower position in the 4a of dogging portion, be connected to pillar 100 by the 4f of this jaw portion, thus with the 4a of dogging portion temporarily fixedly the time, make the horizontal material 1 of temporary structural parts for armrest can be maintained at approximate horizontal, the function of simultaneously can decentralized photo bringing into play the local fatigue that alleviates the 4a of dogging portion for the load of the 4a of dogging portion, in addition, in the present embodiment, also be formed with the through hole 4g of the 4d of wedge portion at the 4f of jaw portion, at this, through hole 4g is formed to have above-mentioned anti-delinking part 4e and can insert logical size, shape.

In addition, in shown in Figure 4 as the front view of representing this connecting elements 4 of the front end pawl 4c of the dogging portion of connecting elements 4, be made to the width B narrow slightly than the horizontal wide A of connecting elements 4.This is in order to ensure certain anti-intensity of load, and connecting elements 4 is to take the horizontal width bigger than the portion that plugs together 101 of pillar 100, yet, during with the curved processing of this state plate dogging 4a, front end pawl 4c can't be inserted in the portion of plugging together 101, and in order to be directed to this, present embodiment is the size that front end pawl 4c is worked into the portion's of plugging together 101 insied widths, makes front end pawl 4c can be inserted in the portion of plugging together 101.

When desire with the temporary structural parts for armrest of above-mentioned formation be fixed in scaffold etc. build the pillar 100 of frame etc. the time, at first the front end pawl 4c dogging with the connecting elements 4 at horizontal material 1 two ends plugs together portion 101 and gives temporarily fixing in about pillar 100.In addition, tiltedly the 4a of dogging portion of material 3 gives the more portion that plugs together 101 of next section of temporarily fixing position with the connecting elements 4 that it temporarily is fixed in than horizontal material 1, thus must this temporary structural parts for armrest up and down continuous installation temporary structural parts for armrest.

Finish with above-mentioned main points after temporary transient the fixing of temporary structural parts for armrest, then the 4d of wedge portion with each connecting elements 4 is erected in vertically then, beats its rear end with hand-operated tools such as lump hammers and squeezes in the portion of plugging together 101.The wedge 4d of portion is owing to be the setting of complicated variant ground with horizontal material 1 or oblique material 3 at this moment, and the sound that beats of the 4d of wedge portion is not directly to influence to horizontal material 1 or oblique material 3.The 4d of wedge portion makes the front end pawl 4c of the 4a of dogging portion simultaneously retreat in pillar 100 sides, slowly closely squeeze into the portion of plugging together 101 with increasing, thus with in the past wedge mode tightly be that means are compared, it is little to beat sound, sympathetic response sound also can reduce, with silent state can fixed armrest with establishing member temporarily.

Finish the installation of temporary structural parts for armrest by squeezing into the 4d of wedge portion in regular turn, do not use twin tong etc. during this time, so application property is fabulous, in addition, take after temporary transient fixing, just to squeeze into the formation of the 4d of wedge portion, only the state that also can stabilize with an operator is implemented temporarily fixing and is squeezed into the 4d of wedge portion, makes job safety and certain.

In addition, make with oblique material 3 to be formed at horizontal material 1 and walking with being covered in the space between the sheet frame, so the gap in this space is by narrow and smallization with being the diagonal angle wire, can prevents tumbling of equipment etc. really.

In addition, when adopting this temporary structural parts for armrest, horizontal material 1, tiltedly material 3 all is positioned at the position on the same plane of an intercolumniation of adjacency, and, by the wedge mode of above-mentioned uniqueness tightly be, therefore generally speaking can constitute structure (purlin) framework and make, can be constructed the high scaffold of intensity.

Moreover, can become installation pillar so long as the four directions form or plug together just passable, for example with formation inserting hole 201 on disk 200 shown in Figure 5ly ... 201 can also.But the reason that is decided to be the four directions in this example is, when for example building being formed the scaffold of rectangle around ground, needs the four directions to form the pillar of the portion that plugs together to ground at this corner part place, is not that every place all need possess the portion of plugging together in the four directions.In other words, as other suitable agent, and look in the front of scaffold etc. and pair of right and left ground possesses the pillar that the portion of plugging together is arranged and handrail of the present invention also can be installed establish member temporarily.

Moreover as shown in Figure 6, if there is not inserting hole, but the discoid portion of plugging together that is equipped with bead F also can become the object of installation of the present invention.Promptly as shown in the figure discoid the plugging together when in the portion temporary structural parts for armrest of the present invention being installed with lip portions, soon the front end pawl 4c dogging of direction is temporarily fixed in bead F down, under this state, squeeze into the 4d of wedge portion, and increase the amount of squeezing into of the wedge 4d of portion, and front end pawl 4c can connect airtight with bead F, and fixedly securing of connecting elements 4 can be finished.In addition, number in the figure 4f is a jaw portion, and 4g is the through hole that the front end of the 4d of wedge portion stretches out, and basic comprising does not have any different with the above embodiments.

On the other hand, as shown in Figure 7, also passable at the oblique material 3 of the upper and lower settings of horizontal material 1.This moment, tiltedly material 3 rotations were engaged in horizontal material 1 freely, or as mentioned above, at this junction surface 2 oblique material can be set and expand the stopper 2a that opens.

Fig. 8 is expression second embodiment, be in the upper and lower settings of oblique material 3 the reinforcement material 5,5 of L word shape.Reinforcement material 5,5 can make narrower and smallization of space that is formed between horizontal material 1 and the sheet frame 80 thus.

According to above-mentioned temporary structural parts for armrest, it is just passable that the floor that operator must upward be installed to desire carries out installation exercise.Be not equipped with temporary structural parts for armrest on this floor this moment, therefore is difficult to expect to prevent fully the effect that falls.So the structure as safer installation temporary structural parts for armrest illustrates according to Figure 10, can realize the temporary structural parts for armrest of the 4th embodiment of said circumstances.The feature of the temporary structural parts for armrest of this embodiment is to be located at the connecting elements 4 that this do not engaged among the connecting elements 4 at horizontal material 1 two ends the other end of oblique material 3 ' be provided with respect to horizontal material 1 with freely rotating.

Figure 11 is expression, relevant for the installation order of the temporary structural parts for armrest of this 4th embodiment.

At first operator W stands next floor of floor is installed in desire, hold the connecting elements 4 of junction surface 2 sides of horizontal material 1 and oblique material 3, make horizontal material 1 roughly become erectility ground that the connecting elements 4 ' dogging of another square end of horizontal material (is temporarily fixed (with reference to Fig. 1 (A)) in the portion that plugs together 101 of last floor, oblique material 3 expression folded states in the diagram, yet expansion is opened also harmless.

Then, the connecting elements 4 of junction surface 2 sides of horizontal material 1 and oblique material 3 is mentioned in the top ((B) with reference to FIG.).This moment, operator W was the front that makes 1 one-tenth oblique material 3 of level ground support of horizontal material, just can be with the plug together portion 101 (with reference to FIG. (c)) of above-mentioned connecting elements 4 doggings in last floor.

According to above-mentioned main points, the connecting elements 4,4 at horizontal material 1 two ends ' dogging when finishing, connecting elements 4 doggings of oblique material 3 are finished haply temporary transient fixing in the portion of plugging together 101, squeeze into wedge portion then and just finish a series of installation exercise.

As mentioned above, the temporary structural parts for armrest of the 4th embodiment is owing to can accomplish (installation that shifts to an earlier date) is installed from following floor in advance.Therefore, program according to this, that is: operator W under the state that temporarily is provided with handrail of being everlasting upwards floor handrail is installed, can carry out this operation safely.

In addition, still can be provided with as above-mentioned expansion at the temporary structural parts for armrest of this 4th embodiment and open stopper or reinforcement material.And connecting elements 4 structures own promptly do not have difference with the foregoing description.Yet in view of the easiness of operation, it is suitable not to be set to that stopper is opened in the expansion of oblique material 3, so just can increase the rotary freedom of oblique material 3, yet, is provided with to expand and opens shelves and end device also harmless (hindering few), or it is also passable to have set firmly the state of oblique material 3 with respect to horizontal material 1.

On the other hand, inequality with the foregoing description, when horizontal material 1 and oblique material 3 are not engaged in the joint revolvably, as long as make this connecting elements that is equivalent to the junction surface 4 " also making when rotating freely can be as " handrail in advance ", and can from floor down up floor handrail is installed.

This moment promptly as shown in figure 12, the front end pawl 4c dogging of rotatable connecting elements 4 that at first will be equivalent to the junction surface of horizontal material 1 and oblique material 3 makes temporary transient fixing (with figure (A)) in the portion that plugs together 101 of pillar, then raise oblique material 3 and with connecting elements 4 doggings of the front end of horizontal material 1 in the portion that plugs together 101 of pillar, ((B) with reference to FIG.).At last with the connecting elements 4 of the front end of oblique material 3 similarly dogging in the portion of plugging together 101 ((C) with reference to FIG.).

In addition, this example is to be equivalent to the connecting elements 4 at the junction surface of horizontal material 1 and oblique material 3 " make rotatable; yet; can not rotate when whole connecting elementss 4 are formed; and when horizontal material 1 and oblique material 3 can not be engaged pivotally; to implement that moving ahead of temporary structural parts for armrest install not is impossible as getting with this 5th embodiment same; yet, when horizontal material 1 and oblique material 3 can not be installed pivotally, implement to move ahead as desire the formation (operation is good) of the mode that still is fit to adopt the 5th embodiment is installed.

Figure 13 represents to be loaded on the distolateral temporary structural parts for armrest of scaffold etc.Promptly, the temporary structural parts for armrest of 1-the 5th embodiment all is installed on the face side of the long axis direction of scaffold etc., and the temporary structural parts for armrest of this 6th embodiment is installed on the side of scaffold, is constituted as a linearity exactly or the terminal side of the scaffold (Working gantry) of end shape is arranged.

This temporary structural parts for armrest be from the centre of horizontal material 10 and in about oblique material 11,12 is set to tilted direction below respectively.Be formed with connecting elements 13 with the illustrated same configuration of the foregoing description at each end ... 13.

In addition, the mounting method of this temporary structural parts for armrest does not also have difference with the foregoing description.At first, the portion that plugs together 101 with post 100 temporarily is fixed in each dogging portion 14 of connecting elements 13, squeezes into wedge portion 15 then and finish installation.

And in this temporary structural parts for armrest, also prevent tumbling of equipment effectively with oblique material 11,12.Just can application property good and quietly install by the minority personnel, in addition, useful for the raising of the intensity of framework (scaffold) respectfully.

As mentioned above, when of the present invention, two members by dogging portion and wedge portion, temporary structural parts for armrest is installed on the pillar on structure right side (scaffold) etc., with dogging portion with the temporary transient well fixed armrest of personnel lathe turner's property of minority with establishing member temporarily, and by squeezing into wedge portion with less personnel just positively fixed armrest with establishing member temporarily.

The sound that is taken place when in addition, wedge portion squeezes into is compared very little with habitual wedging mode.

Moreover tiltedly material becomes the protection material and can prevent tumbling of equipment etc. etc. effectively.

In addition, tiltedly material also can be used as the function of oblique check rod, thereby can constitute high framework of intensity (scaffold) or the like, can provide have prior art the temporary structural parts for armrest of all practical functions that can't obtain.

Moreover the present invention makes it to become the temporary structural parts for armrest that can move ahead and install, and therefore is able to carry out in safer environment the installation that this establishes member temporarily.

Claims (9)

1. temporary structural parts for armrest that the portion of plugging together that utilizes pillar installs is characterized by:

By horizontal material, and constituted from the oblique material of the oblique extension of an end face of this horizontal material, at the two ends of above-mentioned horizontal material and this end of above-mentioned oblique material, possess connecting elements is arranged, this connecting elements be by: can be inserted in the above-mentioned dogging portion that plugs together the pawl of portion or hook but have, and longitudinally above above-mentioned dogging portion and the wedge portion of being beaten between above-mentioned pawl and the dogging portion constitutes.

2. temporary structural parts for armrest as claimed in claim 1 is characterized in that above-mentioned pawl is towards the below.

3. temporary structural parts for armrest as claimed in claim 1 or 2 is characterized in that, with respect to horizontal material oblique material rotation is engaged freely.

4. temporary structural parts for armrest as claimed in claim 1 or 2 is characterized in that, with respect to an end that engages oblique material, the connecting elements of the other end that does not engage oblique material of horizontal material rotatably is provided with.

5. temporary structural parts for armrest as claimed in claim 1 or 2 is characterized in that, at the oblique material junction surface with horizontal material, is provided with the expansion that oblique material is remained on predetermined angular and drives only device of shelves.

6. temporary structural parts for armrest as claimed in claim 1 or 2 is characterized in that, the reinforcement material of L word shape is set on oblique material.

7. temporary structural parts for armrest as claimed in claim 1 or 2 is characterized in that, is provided with on oblique material in the middle of it to be axle and rotatable reinforcement material, and this reinforcement material is provided with can be with respect to the insert portion of the above-mentioned portion of plugging together insertion.

8. temporary structural parts for armrest that the portion of plugging together that utilizes pillar installs is characterized in that:

By horizontal material, and from the middle part of this horizontal material and about extending tiltedly the oblique material of below constituted, at the two ends of above-mentioned horizontal material and each front end of above-mentioned two oblique materials possess connecting elements arranged, this connecting elements by: have dogging in above-mentioned plug together portion towards an ancient unit of weight card division of the pawl of below, and longitudinally run through the top of this an ancient unit of weight card division and wedge portion that beaten between above-mentioned pawl and the dogging portion constitutes.

9. as each described temporary structural parts for armrest in the claim 1,2 or 8, it is characterized in that, above-mentioned connecting elements below dogging portion, be provided with can with the jaw portion of pillar butt.

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