JP4464423B2 - Handrail strength tester - Google Patents

Description

The present invention relates to a handrail strength tester to confirm that it has a set intensity handrail installed at the scene is set in advance.

  In general, handrails installed on balconies and shared corridors are designed to stand upright on parapets on the edge of the floor, and various techniques for increasing the strength of the anchors of the pillars together with the members of the handrails Is disclosed (for example, Patent Document 1).

In addition, these handrails have been confirmed to have the strength as set by the anchors of each member and strut by installing a horizontal load by simulating a handrail of the same specifications at a test site, etc. Specification handrails are installed on site.
JP 2007-70897 A

  However, even if the handrail has a specification that has been confirmed to have a strength as set in a prior test, the strength of the handrail actually installed at the site may be less than the set strength. In particular, the strength of the anchor anchors is affected by the dimensional accuracy of the anchor holes, dust cleaning after drilling, the state of injection of the adhesive, the strength of the concrete that constitutes the parapets, and the curing after the anchors are embedded. In addition, since these construction conditions are different at each site, it is required to confirm that the handrail actually installed at the site has a preset strength.

An object of this invention is to provide the handrail strength tester which can confirm that the handrail installed in the field has the preset setting intensity | strength.

  In order to achieve the above object, the handrail strength tester according to the present invention is for loading on a handrail installed at the site and confirming that this handrail has a preset strength, and the handrail is installed. The frame placed on the floor surface is equipped with a pressurizer that loads a horizontal load on the handrail, a load cell that detects the horizontal load by the pressurizer, and a displacement meter that measures the horizontal displacement of the handrail. . Furthermore, the frame is provided with a locking portion that prevents the frame from falling and sliding due to the reaction force received from the handrail, and this locking portion is locked to the base end portion of the support rail of the handrail.

  According to the above configuration, since the locking portion is provided on the frame, the handrail strength tester is miniaturized to the extent that it can be placed on the floor of the site, while preventing falls and sliding due to the reaction force received from the handrail. The strength of the installed handrail can be confirmed, and since the locking portion is locked to the support rail of the handrail, a dedicated member for locking the locking portion can be eliminated.

  In other words, to check the strength by loading on the handrail installed at the site, it is necessary to downsize the handrail strength tester so that it can be easily carried and installed in a narrow space on the site. The smaller the size, the more likely to fall or slide due to the reaction force received from the handrail. Therefore, by providing a locking portion on the frame and locking it to the support rail of the handrail, it is possible to prevent the handrail strength tester from being downsized and to prevent a fall and slide due to a reaction force received from the handrail. Moreover, since the locking portion is locked to the base end portion of the support column, the reaction force applied to the handrail strength tester is prevented and a normal bending moment acts on the support column. Therefore, it does not affect the confirmation of the handrail strength.

  In addition, there are various types of handrails with different dimensions such as the height and installation position of the column, but if the height and front and back positions of the pressurizer, load cell and displacement meter can be adjusted according to the handrail, With one handrail strength tester, the strength of various handrails installed on site can be confirmed. Furthermore, if the frame is provided with a moving means for moving in the vicinity of the handrail, the handrail strength tester carried on the floor at the site can be easily set at a predetermined position.

Further, by the following method for checking the handrail strength, it is possible to confirm that the handrail has a preset strength set by being loaded on the handrail installed at the site.

  Specifically, in advance, a simulated handrail is installed at the factory (test site) under the same conditions as the handrail installed at the site, and by loading on the simulated handrail, it is confirmed that the simulated handrail has a set strength. Measure the displacement of the simulated handrail due to loading. After that, a load equal to or less than the set strength is applied to the handrail installed at the site, and the displacement is measured. The difference between the displacement of the simulated handrail and the displacement of the handrail at the site is equal to the allowable value. Make sure that:

  According to the above configuration, since it is confirmed in advance that the simulated handrail has the set strength, it can be ensured that the handrail installed at the site also has the set strength as long as it is installed under the set conditions. Furthermore, the simulated handrails constructed on the same conditions and the handrails at the site are almost equal in displacement due to loading of equal loads, so by confirming that the difference in displacement is less than the allowable value, It can be confirmed that the handrail is installed under the set conditions and has the set strength. Moreover, since the load to be loaded on the handrail at the site is set below the set strength, the handrail at the site can be kept healthy.

  The construction conditions include, for example, the strength of the concrete at the part where the column is erected, the size of the anchor hole and dust cleaning after drilling, the state of injection of the adhesive, and the curing of the concrete after the anchor is buried. .

  Moreover, as a load loaded on a handrail and a simulated handrail, it is preferable to load a horizontal load, and as a displacement to be measured, it is preferable to measure a horizontal displacement of the handrail and the simulated handrail at a loading position of the horizontal load. In other words, since the main load received by the handrail in use is a horizontal load, it is better to load the horizontal load and check the strength of the handrail. Therefore, it is easier to measure the horizontal displacement than other displacements, and the behavior of the handrail can be accurately detected. In addition, it can replace with a horizontal displacement and can also measure the bending angle etc. of a support | pillar.

  As is clear from the above description, according to the present invention, since the locking portion provided on the frame is locked to the base end portion of the handrail column, the handrail strength test is performed while preventing the handrail strength tester from overturning and sliding. The machine can be miniaturized to such an extent that it can be placed on the floor of the site. Thereby, it is possible to confirm that the handrail has a set strength set in advance by loading a handrail installed on the site.

  In addition, it is confirmed in advance that the simulated handrail has the set strength, and further, a load is loaded on the on-site handrail, and the difference in displacement between the simulated handrail and the on-site handrail due to an equal load is less than the allowable value. By confirming that there is a handrail, it can be confirmed that the handrail at the site is installed as set and has a preset set strength.

Hereinafter, embodiments of the handrail strength tester according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a handrail strength tester according to the present invention. FIG. 2 is a perspective view of the main part of the handrail strength tester, with the cover removed and the internal pressurizer exposed. 3 is a side view of a handrail strength tester set at a position where the handrail is loaded, FIG. 4 is a perspective view of a locking portion, FIG. 5 is a front view of an operation panel, and FIG. 6 is a data recording card in a compact recorder of the operation panel. It is a figure which shows a mode that it inserts.

  The handrail strength testing machine 1 is for loading on a handrail 2 installed on a balcony, a common hallway, etc., and confirming that this handrail 2 has a preset strength, and the floor on which the handrail 2 is installed. A frame 4 placed on the surface 3, a pressurizer 5 that loads a horizontal load on the handrail 2, a load cell 6 that detects the horizontal load by the pressurizer 5, a displacement meter 7 that measures the horizontal displacement of the handrail 2, The handrail 2 is provided with a locking portion 8 provided on the frame 4, and the locking portion 8 is locked to the base end portion of the support column 10 of the handrail 2 erected on the parapet 9 on the edge of the floor surface 3. It prevents the fall and the slide by the reaction force received from the.

  The frame 4 includes an upper frame 13 having a structure in which two vertical members 12 are extended downward from a support base 11 that supports the pressurizer 5, the load cell 6, and the displacement meter 7, and a leg portion 14 having an H-shaped planar shape. Two vertical members 15 extending upward and having a structure in which the upper end thereof is connected by a horizontal member 16, and the vertical member 12 of the upper frame 13 is slidable on the vertical member 15 of the lower frame 17. The frame 4 is assembled by being fitted inside.

  A holding body 18 that holds the pressurizer 5, the load cell 6, and the displacement meter 7 is slidably mounted on the support base 11 of the upper frame 13, and can be tightened so as to restrict the movement of the holding body 18. A clamp 19 is provided. Thereby, the front and back positions of the pressurizer 5, the load cell 6 and the displacement meter 7 can be adjusted according to the handrail 2.

  Further, the support base 11 of the upper frame 13 is provided with a rotatable bolt 20 with a handle protruding downward. The bolt 20 with the handle is screwed into the bolt through hole of the horizontal member 16 of the lower frame 17, and the upper frame 13 is moved up and down by rotating the bolt 20 with the handle. Further, a clamp 21 is provided on the vertical member 15 of the lower frame 17 so as to be clamped so as to restrict the vertical movement of the upper frame 13. Thereby, the height of the pressurizer 5, the load cell 6, and the displacement meter 7 can be adjusted according to the handrail 2.

  The pressurizing machine 5 has a rod 23 projecting forward from the electric cylinder 22 and a push fitting 24 attached to the tip of the rod 23 with a load cell 6 interposed therebetween. While the load is being loaded, the load cell 6 detects the reaction force received by the pressing bracket 24 from the handrail 2 and detects the horizontal load.

  A displacement gauge 7 held by the holding body 18 is connected to the pressing metal 24, and the horizontal displacement of the pressing metal 24, that is, the horizontal displacement of the handrail 2 is measured. The support 11 is provided with a cover 25 that covers the holding body 18 and the electric cylinder 22 of the pressurizer 5, and a handle 26 for transport is attached to the cover 25.

  An operation panel 27 is provided on the lower frame 17, and the handrail strength tester 1 is operated by the operation switch 28, and the horizontal load detected by the load cell 6 and the displacement measured by the displacement meter 7 are displayed on the display 29. In addition, data is recorded on a data recording card 31 inserted into the compact recorder 30.

  The legs 14 of the lower frame 17 are provided with adjusters 32 for individually adjusting the heights of the four tips, and the knobs 33 are turned to adjust the height of each adjuster 32 so as to match the gradient and unevenness of the floor surface 3. By adjusting the height, the handrail strength tester 1 is set horizontally. A caster 34 is provided on the leg portion 14 of the lower frame 17 so that the caster 34 can be moved in and out. The caster 34 functions as a moving means for moving the handrail strength tester 1 to the vicinity of the handrail 2.

  The locking portion 8 is a U-shaped member provided across the vicinity of the base ends of the two vertical members 15 of the lower frame 17, and the locking hole 35 formed in the front end portion of the locking portion 8 is used as the column 10 of the handrail 2. By engaging with a locking pin 36 projecting from the base end portion of the column 10, the base end portion of the column 10 is locked. Further, by fastening the U-shaped bracket 38 with the bolt 37 so as to sandwich the support column 10, the locking hole 35 is prevented from coming off from the locking pin 36.

  The locking portion 8 is formed by tightening a clamp 41 penetrating a horizontally long slot 39 formed along the member direction and a vertically long hole 40 formed in the vertical member 15 of the lower frame 17. It is fixed to the vertical member 15 of the lower frame 17. As a result, the position of the locking portion 8 can be adjusted back and forth and up and down along the long holes 40 and 41 so as to match the height of the parapet 9 and the position of the column 10 on which the column 10 of the handrail 2 stands. The

  Next, a method for checking handrail strength will be described. First, a simulated handrail is installed in advance in a factory (test site) or the like under the same conditions as the handrail 2 installed on the site. The installation conditions of the handrail 2 and the simulated handrail are the dimensions and materials of each member such as the column, the strength and size of the concrete block where the column is erected in place of the parapet 9, the depth of the anchor, and the injection of the adhesive into the anchor hole Such as quantity.

  Next, a horizontal load is loaded on the tip of the simulated handrail (for example, a height of 1200 mm from the upper surface of the concrete block), and the horizontal load is gradually increased (for example, 1000 N or more) until at least the set strength is reached. At this time, it is confirmed that the simulated handrail has a set strength while observing the breakage state of the concrete block as a substitute for the parapet 9 such as the occurrence of a crack, and the horizontal displacement of the simulated handrail corresponding to each value of the horizontal load. Measure. The horizontal displacement of the simulated handrail measures the horizontal displacement at the loading position of the horizontal load.

  After the handrail 2 is installed on the site, a horizontal load equal to or less than the set strength is loaded on the front end portion of the handrail 2 (for example, a height of 1200 mm from the upper surface of the parapet 9) with the handrail strength tester 1 (for example, 1000 N or less) ). At this time, the horizontal displacement at the loading position of the horizontal load is measured while confirming the presence or absence of damage to the parapet 9 such as the occurrence of cracks or damage to each member such as the column 10.

  Further, it is confirmed that the difference between the displacement of the simulated handrail and the displacement of the handrail 2 due to the loading of the equal horizontal load (for example, 1000 N) is equal to or less than an allowable value (for example, 10 mm). Thereby, it is confirmed that the handrail 2 is installed under the same conditions as the simulated handrail, and it is confirmed that the handrail 2 has a set strength, similar to the simulated handrail.

  Next, a procedure for measuring the horizontal displacement by loading a horizontal load on the tip of the handrail 2 with the handrail strength tester 1 will be specifically described. FIG. 7 is a diagram showing a procedure for measuring the horizontal displacement of the handrail, and shows the first step. FIG. 8 is a diagram showing a procedure for measuring the horizontal displacement of the handrail, and shows the next step of FIG. FIG. 9 is a diagram showing a procedure for measuring the horizontal displacement of the handrail, and shows the next step of FIG.

  First, as shown in FIG. 7 (a), for example, a parapet 9 is preliminarily erected on the parapet 9 and the column 10 is covered with the strut 10 and fixed with a tex screw 43. The column 10 is erected on the side.

  Next, as shown in FIG. 7B, the height of the parapet 9 and the distance from the inner edge of the parapet 9 to the locking pin 36 of the support column 10 are measured, and the position of the locking hole 35 is at this height and distance. The clamp 41 is loosened so as to fit, and the locking portion 8 is moved back and forth and up and down along the long holes 40 and 41. After adjusting the position of the locking portion 8, the clamp 41 is tightened to fix the locking portion 8 to the frame 4.

  As shown in FIG. 7 (c), the handrail strength tester 1 is moved close to the column 10 to lock the locking hole 35 of the locking portion 8 to the locking pin 36 of the column 10, and the column 10. The U-shaped metal fitting 38 is bolted to the locking portion 8 so as to sandwich the pin. Further, the handrail strength tester 1 is adjusted so that the vertical members 12 and 15 of the frame 4 are parallel to the support column 10 by adjusting the height of each adjuster 32 by turning the knob 33 so as to match the gradient of the floor surface 3. set. In addition, when moving the handrail strength tester 1 near the support column 10, the caster 34 is pulled out and used.

  As shown in FIG. 8 (d), the upper frame 13 is moved up and down by loosening the clamp 21 and rotating the bolt 20 with the handle, so that the height of the center of the press fitting 24 of the pressurizer 5 is adjusted to the tip of the handrail 2. Adjust to fit the height of the part (eg 1200 mm). After adjusting the height of the pressing metal 24 of the pressurizer 5, the clamp 21 is tightened and fixed.

  As shown in FIG. 8 (e), the clamp 19 is loosened, the holding body 18 holding the pressurizer 5 is slid along the support base 11, and the pusher 24 of the pressurizer 5 is moved to the column 10 of the handrail 2. The clamp 19 is tightened and fixed in a state in which it is in contact with the front end portion.

  Next, as shown in FIG. 8 (f), after confirming that all the clamps 19, 21, and 41 are securely tightened, the plug of the operation panel 27 is inserted into an outlet, and the power switch is turned on. By operating the operation switch 28, the pressurizer 5 loads and unloads the horizontal load on the handrail 2, and this loading and unloading is repeated several times to remove the play of the handrail strength tester 1.

  As shown in FIG. 9 (g), the clamp 19 is loosened again, and the holding body 18 is advanced by the amount of the gap left between the handrail 2 due to the backlash removal, and the press fitting 24 of the pressurizer 5 is moved to the handrail 2 as shown in FIG. The tip 19 of the column 10 is brought into contact again, and the clamp 19 is securely tightened and fixed.

  The data recording card 31 is inserted into the compact recorder 30 and the switch of the recorder is turned ON, and the automatic pressurizing switch is turned ON to operate the pressurizer 5. Thereby, the horizontal load (for example, 1000 N) loaded on the handrail 2 and the horizontal displacement of the handrail 2 are detected, and these data are displayed on the display 29 and recorded on the data recording card 31. Since the detected horizontal displacement includes the horizontal displacement (for example, 4 mm to 5 mm) of the handrail strength tester 1, the value obtained by correcting the horizontal displacement is set as the horizontal displacement of the handrail 2.

  Here, the handrail strength tester 1 tries to fall or slide backward due to the reaction force received by the push fitting 24 from the handrail 2, but by locking the locking portion 8 to the column 10 of the handrail 2. The fall and sliding are prevented. In addition, since the locking portion 8 is locked to the base end portion of the column 10, the reaction force applied to the handrail strength tester 1 can be supported by the locking portion 8, and the column 10 can be bent normally. A moment acts, and the strength of the column 10 can be confirmed accurately, and the horizontal displacement thereof can be measured accurately.

  As shown in FIG. 9 (h), the data recording card 31 is taken out from the compact recorder 30, the data is taken into the computer 44, and the test result is printed out to the printer 45.

  In addition, this invention is not limited to said embodiment, A change can be suitably added within the scope of the present invention. For example, as shown in FIG. 10, when the height of the parapet 9 is high, the adjustment block 46 can be placed on the floor surface 3 and the handrail strength tester 1 can be set thereon.

Perspective view of handrail strength tester according to the present invention This is a perspective view of the main part of the handrail strength tester, with the cover removed and the internal pressurizer exposed. Side view of the handrail strength tester set at the position to load on the handrail Perspective view of locking part Front view of operation panel The figure which shows a mode that a data recording card is inserted in the compact recorder of an operation panel Figure showing the procedure for measuring the horizontal displacement of the handrail, showing the first step It is a figure which shows the procedure which measures the horizontal displacement of a handrail, and shows the next process of FIG. It is a figure which shows the procedure which measures the horizontal displacement of a handrail, and shows the next process of FIG. Side view of the main part of the handrail strength tester set on the adjustment block

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Handrail strength tester 2 Handrail 3 Floor surface 4 Frame 5 Pressurizer 6 Load cell 7 Displacement meter 8 Locking part 10 Posts 19 and 21 Clamp 34 Caster

Claims (3)

A handrail strength tester for loading a handrail installed at a site and confirming that the handrail has a preset strength.
A frame placed on the floor on which the handrail is installed, a pressurizer that loads a horizontal load on the handrail, a load cell that detects a horizontal load by the pressurizer, and a displacement meter that measures the horizontal displacement of the handrail Equipped and
A handrail strength testing machine, wherein the frame is provided with a locking portion for preventing a fall and sliding due to a reaction force received from the handrail, and the locking portion is locked to a base end portion of a handrail column.   The handrail strength tester according to claim 1, wherein the pressurizer, the load cell, and the displacement meter are adjustable in height and front and rear positions according to the handrail.   The handrail strength tester according to claim 1 or 2, wherein the frame is provided with moving means for moving the frame in the vicinity of the handrail.

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