JPH0658311A - Anchor bolt and anchor bolt fitting device and method - Google Patents

Abstract

PURPOSE:To automate extremely simply fitting work to an under-hole. CONSTITUTION:An anchor bolt shaft 12 has a male screw 12a at its tip, and at its end a taper portion 12b that spreads out in a fan shape. An anchor sleeve 13 is put on the anchor bolt shaft 12, and at this anchor sleeve 13, a slit is provided on the taper portion 12b side of the anchor bolt shaft 12. An 'O' ring 15, a toothed washer 16, an 'O' ring 17, a flat washer 18 and a disk spring washer 19 are respectively put on the anchor bolt shaft 12 between the anchor sleeve 13 and a nut 14. By the tightening of the prior nut 14, the anchor sleeve 13 is pressed against the taper portion 12b, and the friction combination of the anchor sleeve 13 and the toothed washer 16 is carried out by means of the 'O' ring 15. An anchor bolt 11 is inserted into an under-hole, and the tooth 16a of the toothed washer 16 is engaged with a fitting surface, and the running idle of the anchor sleeve 13 is prevented. Afterwards, the anchor sleeve 13 is fixed at the under-hole by tightening the nut 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor bolt and an anchor bolt mounting device and method, and more particularly to an anchor bolt and anchor bolt mounting device and method suitable for fixing a bracket to a wall surface in an elevator hoistway.

[0002]

2. Description of the Related Art FIG. 6 shows an elevator structure in which a large number of anchor bolts are used. The elevator includes an elevator hoistway 1 and an elevator main body 2 that moves up and down the elevator hoistway 1.
, Elevator 3, suspension wire 4, counterweight 5
And a guide rail 6 for the elevator body and a guide rail 7 for the counterweight. These guide rails 6 and 7 are attached to the wall surface of the elevator hoistway 1 by anchor bolts.

FIG. 7 shows the mounting state of the guide rails by the anchor bolts. The anchor bolts 8 mount the brackets 9 and 10 on the wall surface 1a of the elevator hoistway 1, and the guide rails 6 are mounted on these brackets 9 and 10. Mounted. The anchor bolt 8 is generally an anchor bolt shaft having a male thread engraved at the tip and a taper portion diverging toward the end, an anchor sleeve inserted through the anchor bolt shaft and having a slit engraved at the end, and an anchor bolt. It is composed of a nut screwed to the male thread of the bolt shaft and a washer inserted into the anchor bolt shaft so as to be interposed between the nut and the anchor sleeve. After drilling a prepared hole in the wall surface 1a of the elevator hoistway 1, the anchor bolt 8 pushes the anchor sleeve into the taper portion of the anchor bolt shaft by tightening the nut, and the slit of the anchor sleeve is expanded to gradually increase the diameter of the anchor sleeve. Adjust so that it matches the inner diameter of the pilot hole. By this diameter adjustment, after the anchor sleeve comes to be caught in the prepared hole, the entire anchor bolt is driven into the prepared hole. By this driving, the anchor sleeve is caught in the prepared hole and does not idle even if the nut is rotated, so when the nut is tightened after that, the anchor sleeve expands in diameter due to the expansion of the slit and bites into the wall surface of the prepared hole. In this way, the anchor bolt is fixed to the prepared hole.

[0004]

Since the mounting work for fixing such anchor bolts to the prepared hole of the wall surface is generally performed at a high place such as in the elevator hoistway described above, it is very dangerous. , Automation is strongly desired. However, the attachment of the above-described conventional anchor bolt requires the work of adjusting the diameter of the anchor sleeve until it reaches the inner diameter of the prepared hole, and the work of driving the anchor bolt into the prepared hole and tightening the nut after this adjustment. It is a complicated task to do. For this reason, it is very difficult to automate such complicated anchor bolt mounting work, and it is extremely difficult to automate the anchor bolt mounting work using an industrial robot composed of one arm. It was Therefore, the first of the present application
SUMMARY OF THE INVENTION It is an object of the invention to provide an anchor bolt capable of extremely easily automating the mounting work to the prepared hole. An object of the second and third inventions of the present application is to attach an anchor bolt that can easily automatically attach an anchor bolt to a prepared hole even if an industrial robot having one arm is used. An apparatus and method are provided.

[0005]

In order to achieve this object, the first invention of the present application is to insert an anchor bolt shaft having a male thread at the tip and a taper portion diverging toward the end and the anchor bolt shaft. An anchor bolt comprising an anchor sleeve having a slit formed on a distal end side thereof and a nut screwed to a male screw of the anchor bolt shaft, wherein the anchor bolt is positioned so as to be located between the anchor sleeve and the nut. A toothed washer having teeth that are inserted into the shaft and engaged with the anchor bolt mounting surface, and an elastic material that is inserted into the anchor bolt shaft so as to be interposed between the toothed washer and the anchor sleeve. A ring, wherein the elastic material ring frictionally connects the toothed washer and the anchor sleeve to each other by contact with each other.

In this structure, the second elastic material ring and the plain washer inserted through the anchor bolt shaft so as to be positioned between the toothed washer and the nut in order from the toothed washer side. It is preferable to further include a disc spring washer. A second invention of the present application is an anchor bolt shaft having a male thread at the tip and a taper portion diverging toward the end, an anchor sleeve that is inserted into the anchor bolt shaft and has a slit formed on the terminal side, and the anchor bolt. A nut screwed to the male thread of the shaft, and a toothed washer having teeth that are inserted into the anchor bolt shaft so as to be located between the anchor sleeve and the nut and that are engaged with the anchor bolt mounting surface. A first elastic member which is inserted into the anchor bolt shaft so as to be interposed between the toothed washer and the anchor sleeve, and which frictionally couples the toothed washer and the anchor sleeve by contacting each of them. An anchor bolt composed of a material ring and a second elastic material ring inserted into the anchor bolt shaft so as to be interposed between the nut and the toothed washer is attached to the anchor bolt. An anchor bolt mounting device for mounting on a bolt mounting surface, wherein a nut holding portion for holding the nut and thereby supporting the anchor bolt, and the anchor bolt supported by the nut holding portion are moved linearly in the axial direction. Anchor bolt insertion mechanism that inserts this into the pilot hole and the screw holding machine that connects to the nut holding part and rotates the nut of the anchor bolt that is inserted into the pilot hole to tighten it. And a detection means for detecting the amount of crushing of the second elastic material ring caused by tightening by a machine.

According to a third aspect of the present invention, an anchor bolt shaft having a male thread at the tip and a taper portion diverging toward the end, and an anchor sleeve inserted into the anchor bolt shaft and having a slit on the end side are formed. A nut screwed to the male screw of the anchor bolt shaft, and a tooth having a tooth that is inserted into the anchor bolt shaft so as to be located between the anchor sleeve and the nut and that is engaged with the anchor bolt mounting surface. A washer, and is inserted into the anchor bolt shaft so as to be interposed between the toothed washer and the anchor sleeve,
An anchor bolt mounting method for mounting an anchor bolt composed of an elastic material ring that frictionally couples the toothed washer and the anchor sleeve to each other by contacting the anchor washer with the nut. A first step in which the toothed washer and the anchor sleeve are frictionally coupled by the elastic material ring by quantitatively tightening and pressing the anchor sleeve against the taper portion, and the anchor bolt is formed in the prepared hole after the first step. A second step of inserting and engaging the teeth of the toothed washer with the anchor bolt mounting surface;
After the second step, there is provided a third step of further tightening the nut to expand the diameter of the anchor sleeve so as to bite into the prepared hole.

[0008]

In the anchor bolt according to the first aspect of the present invention, by tightening the nut, the anchor sleeve is pressed against the taper portion of the anchor bolt shaft to widen the slit of the anchor sleeve. As a result, the anchor sleeve receives an axial reaction force from the taper portion, and this reaction force acts on the anchor sleeve, the elastic material ring, and the toothed washer. Due to the action of this reaction force, the elastic material ring press-contacts with each of the toothed washer and the anchor sleeve, and frictionally connects the both.

After this, when the anchor bolt is inserted into the prepared hole, the toothed washer engages with the anchor bolt mounting surface. The anchor sleeve frictionally connected to the toothed washer by the elastic material ring is prevented from idling by the above engagement. When the nut is tightened after this, the taper portion further expands the slit of the anchor sleeve, and the anchor sleeve bites into the inner wall of the prepared hole. As described above, in the anchor bolt according to the present invention, when the nut is properly tightened in advance, the toothed washer and the anchor sleeve can be frictionally coupled to each other via the elastic material ring, and thereafter, the entire anchor bolt is simply formed into the prepared hole. It can be installed in the pilot hole simply by inserting and tightening the nut.

In the anchor bolt attaching device according to the second aspect of the present invention, the nut of the anchor bolt is previously tightened, and the toothed washer and the anchor sleeve are frictionally coupled by the axial reaction force from the taper portion via the elastic material ring. . The nut holding portion holds the anchor bolt in this state, and then the anchor bolt insertion mechanism moves the anchor bolt supported by the nut holding portion in the axial direction to insert the anchor bolt into the prepared hole. As a result, the toothed washer of the anchor bolt engages with the anchor bolt mounting surface, and this engagement prevents the anchor sleeve from idling. After this, the screw tightener tightens the nut to widen the slit of the anchor sleeve and bite the anchor sleeve into the inner wall of the prepared hole. At this time, the detection means detects the amount of collapse of the elastic material ring caused by the tightening by the screw tightener. Since the detection output of this detection means corresponds to the expansion amount of the diameter of the anchor sleeve, the tightening amount of the screw tightening machine can be controlled based on this detection output.

Further, in the anchor bolt attaching method according to the third aspect of the present invention, the nut is tightened by a predetermined amount in the first step, whereby the anchor sleeve is pressed against the tapered portion, and the toothed washer and the anchor sleeve are attached by the elastic material ring. Frictionally couple. In the subsequent second step, the anchor bolt is inserted into the prepared hole to engage the teeth of the toothed washer with the anchor bolt mounting surface. In the subsequent third step, the nut is further tightened to expand the diameter of the anchor sleeve and bite into the prepared hole.

As described above, according to the anchor bolt attaching device and method of the present invention, the anchor bolt can be attached to the prepared hole simply by inserting the anchor bolt into the prepared hole and tightening the nut. . Therefore, even if the industrial robot composed of one arm is used, the anchor bolt mounting work can be automated.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an anchor bolt and an anchor bolt attaching device and method according to the present invention will be described below with reference to FIGS.
Description will be made with reference to FIGS. 1 to 5 in which the same parts as those of FIG. FIG. 1 shows an embodiment of an anchor bolt according to the present invention. The anchor bolt 11 has an anchor bolt shaft 12, the anchor bolt shaft 12 has a male screw 12a at the tip, and a taper portion diverging toward the end. 12b. An anchor sleeve 13 is inserted through the anchor bolt shaft 12, and a slit 13 is formed in the anchor sleeve 13 at the terminal side, that is, at the taper portion 12b side of the anchor bolt shaft 12.
a (see FIG. 2) is engraved. A nut 14 is screwed onto the male screw 12a of the anchor bolt shaft 12.

A first O-ring 15 made of an elastic material and a toothed washer 16 are provided between the anchor sleeve 13 and the nut 14.
And a second O-ring 17 made of an elastic material, a flat washer 18 and a disc spring washer 19 are respectively inserted into the anchor bolt shaft 12,
The first O-ring 15, the toothed washer 16, the second O-ring 17, the flat washer 18 and the disc spring washer 19 are sequentially arranged in this order from the anchor sleeve 13 side.

FIG. 2 shows the overall construction of an embodiment of an anchor bolt mounting device according to the present invention. A torque controllable screw tightener 20 has a drive shaft 20a and is supported by a support bracket 21. There is. The support bracket 21 is supported by a table 22, and the table 22 is movably guided along a guide rail 23. The guide rail 23 is supported by a main frame 24, and an anchor bolt insertion drive section 25 is attached to the main frame 24. The anchor bolt insertion drive section 25 is mounted on the drive shaft 2 of the anchor bolt insertion drive section 25.
5 a is connected to the support bracket 21. The table 22, the guide rail 23, the main frame 24, and the anchor bolt insertion drive unit 25 constitute an anchor bolt insertion mechanism that inserts the anchor bolt into the prepared hole.

The main frame 24 includes a bracket drive section 2
6 and a guide rail 27 are respectively supported, and the guide rail 27 guides the table 28. This table 28
A frame 29 is supported on the frame 29, and a bracket attracting magnet 30 is fixed to the frame 29. A distance sensor 31 and a nut socket portion, that is, a nut holding portion 32 are attached to the support bracket 21, and the distance sensor 31 is juxtaposed with the screw tightener 20.

As shown in FIG. 3, the nut holding portion 32 is
A main body 33, a ring-shaped magnet 34 attached to the outer peripheral portion of the lower end of the main body 33, a bearing 35 attached to the outer peripheral portion of the upper end of the main body 33, and a nut 36 for pressing the bearing 35,
A bearing box 37 that supports the outer periphery of the bearing 35, and the bearing box 3
7 and a stopper 38 of the bearing 34 fixed to the shaft 7. The main body 33 has a fitting hole 33a that fits into the drive shaft 20a of the screw tightener 20, and the nut 14 of the anchor bolt 11.
And a fitting hole 33b that fits in the respective holes. Further, the bearing box 37 is fixed to the support bracket 21 by bolts 39.
Is stuck to. The anchor bolt attachment device having such a configuration is attached to a robot (not shown).

Next, the operation of this embodiment will be described. Figure 1
First, when the nut 14 of the anchor bolt 11 is tightened by an appropriate amount, the nut 14 has a disc spring washer 19, a flat washer 18, a second O-ring 17, a toothed washer 16 and a first O-ring 15. The anchor sleeve 13 is pressed against the tapered portion 12b via the and to expand the slit 13a of the anchor sleeve 13. As a result, the anchor sleeve 13 receives an axial reaction force from the taper portion 12b, and this reaction force acts on the anchor sleeve 13, the first O-ring 15, the toothed washer 16, the second O-ring 17, and the flat washer 18. It acts on the disc spring washer 19. By the action of this reaction force, the first and second O-rings 15 and 17 frictionally couple the plain washer 18, the toothed washer 16 and the anchor sleeve 13 by the frictional force. On the other hand, since the nut 14 and the disc spring washer 19 have a smooth metal contact, the rotation of the nut 14 slips with respect to the disc spring washer 19 and is not transmitted to the disc spring washer 19 and thereafter.

The nut 14 of the anchor bolt 11 in this state
Is fitted into the fitting hole 33b of the nut holding portion 32 as shown in FIGS.
The anchor bolt 11 is held by the magnetic force of. As shown in FIG. 2, the magnet 30 for attracting the bracket has the bracket 9 with the center of the mounting hole 9a being the anchor bolt 11.
It is adsorbed so as to almost coincide with the central axis of. The bracket driving unit 26 lowers the frame 29 to move the bracket 9
Is brought into contact with the elevator hoistway wall surface 1a, and the robot aligns the mounting hole 9a of the bracket 9 with the pilot hole 40 of the elevator hoistway wall surface 1a.

After this, the anchor bolt insertion drive unit 25
Lowers the support bracket 21 so that the anchor bolt 1
When 1 is inserted into the prepared hole 40 through the mounting hole 9a of the bracket 9 and pressed with an appropriate force, the teeth 16a of the toothed washer 16 engage with the upper surface of the bracket 9, that is, the anchor bolt mounting surface. The anchor sleeve 13 frictionally coupled to the toothed washer 16 by the first O-ring 15 is prevented from idling by the above engagement. After that, as shown in FIG. 5, when the screw tightener 20 tightens the nut 14 via the nut holding portion 32, the taper portion 12b further expands the slit 13a of the anchor sleeve 13 and opens the anchor sleeve 13 into the prepared hole 4
Fix it by digging into the inner wall of 0. When the tightening of the nut 14 by the screw tightener 20 is completed, the first and second O-rings 15 and 17 are crushed and enter the gap between the anchor bolt shaft 12 and the toothed washer 16 and the flat washer 18. Therefore, there is no possibility of loosening due to the presence of the first and second O-rings 15 and 17 after the tightening is completed.

The tip of the distance sensor 31 contacts the upper surface of the bracket 9, and the nut 14 by the screw tightener 20
The amount of tightening, that is, the amount of collapse of the second O-ring 17 caused by the above tightening is detected, and the completion of tightening is determined. This will be described in more detail. The nut 14 and the disc spring washer 1
The distance from the boundary between the screw 9 and the contact surface between the toothed washer 16 and the bracket 9 is as shown in FIG.
Is L1 as shown in FIG. 5, and the thickness of the second O-ring 17 becomes zero after the completion of tightening, so that it is reduced to L2 as shown in FIG. Therefore, the distance sensor 31 is L1
The completion of tightening by the screw tightener 20 can be detected by detecting the change in the distance from L2 to L2.

If the anchor sleeve 13 fails to prevent idling due to some reason, the screw tightener 2
Despite the rotation of the nut 14 by 0, the distance L1 hardly changes. Therefore, the distance sensor 31 has this distance L
It is also possible to detect the failure of the slip prevention from the invariance of 1.

Of course, such completion of tightening can be determined by detecting the torque of the screw tightener 20 if the diameter of the prepared hole 40 is constant. It should be noted that the bearing 35 of the nut holding portion 32 is prevented from being damaged by an axial force acting on the drive shaft of the screw tightener 20 when the anchor bolt 11 is pushed into the prepared hole 40 by the anchor bolt insertion drive portion 25. Protects. In the above embodiment, the distance sensor 3
1 used a contact type sensor. However, the present invention is not limited to this, and a non-contact type optical sensor, an ultrasonic sensor or the like may be used. Further, the number of O-rings used for the anchor bolt 11 is also 2 in the above embodiment.
The number is not limited to individual and can be changed.

[0024]

As is apparent from the above description, in the anchor bolt according to the first invention of the present application, when the nut is properly tightened in advance, the toothed washer and the anchor sleeve are frictionally coupled to each other via the elastic material ring. After that, the entire anchor bolt can be inserted into the pilot hole and the nut can be tightened to mount the bolt in the pilot hole. Therefore, the mounting operation to the pilot hole can be extremely easily automated. According to the anchor bolt attaching device and method according to the second and third aspects of the invention, the anchor bolt can be attached to the prepared hole by simply inserting the anchor bolt into the prepared hole and tightening the nut. Even if an industrial robot composed of one arm is used, the anchor bolt mounting work can be automated.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an anchor bolt according to the present invention in a partial cross section.

FIG. 2 is a front view showing an embodiment of an anchor bolt attaching device according to the present invention.

FIG. 3 is an enlarged sectional view showing a part of the embodiment of the anchor bolt attaching device.

4 is a sectional view showing a state in which the anchor bolt of FIG. 1 is mounted on the anchor bolt attaching device of FIG.

5 is a cross-sectional view showing a state where the anchor bolt attachment device of FIG. 4 attaches an anchor bolt to a prepared hole.

FIG. 6 is a perspective view showing a general elevator structure.

7 is a perspective view showing a use state of anchor bolts in the elevator structure of FIG.

[Explanation of symbols]

 11 Anchor Bolt 12 Anchor Bolt Shaft 12a Male Thread 12b Tapered Part 13 Anchor Sleeve 14 Nut 15 Elastic Material Ring (O-Ring) 16 Toothed Washer 16a Tooth 17 Elastic Material Ring (O-Ring) 20 Screw Tightening Machine 22, 23, 24, 25 Anchor bolt insertion mechanism 31 Detection means (distance sensor) 32 Nut holding part 40 Prepared hole

Claims (4)

[Claims] 1. An anchor bolt shaft having a male thread at the tip and a diverging tapered portion at the end, an anchor sleeve inserted into the anchor bolt shaft and having a slit formed on the terminal side, and an external thread of the anchor bolt shaft. An anchor bolt having a nut screwed into the shaft, the tooth having a tooth that is inserted into the anchor bolt shaft so as to be located between the anchor sleeve and the nut and that is engaged with the anchor bolt mounting surface. A toothed washer; and an elastic material ring inserted through the anchor bolt shaft so as to be interposed between the toothed washer and the anchor sleeve, the elastic material ring comprising the toothed washer and the anchor sleeve. Anchor bolts that are frictionally coupled to each other by contacting with each other. 2. A second elastic material ring, a flat washer, and a disc spring washer inserted through the anchor bolt shaft so as to be sequentially positioned from the toothed washer side between the toothed washer and the nut. The anchor bolt according to claim 1, further comprising: 3. An anchor bolt shaft having a male thread at the tip end and a taper portion that spreads toward the end, an anchor sleeve inserted into the anchor bolt shaft and having a slit formed on the terminal side, and an external thread of the anchor bolt shaft. A threaded nut, a toothed washer having teeth that are inserted into the anchor bolt shaft so as to be located between the anchor sleeve and the nut, and that are engaged with the anchor bolt mounting surface, A first elastic material ring which is inserted into the anchor bolt shaft so as to be interposed between the toothed washer and the anchor sleeve, and which frictionally couples the toothed washer and the anchor sleeve with each other by contact with each other. And an anchor bolt composed of a second elastic material ring inserted into the anchor bolt shaft so as to be interposed between the nut and the toothed washer. An anchor bolt attachment device for attaching to an attachment surface, a nut holding portion that holds the nut and thereby supports the anchor bolt, and the anchor bolt supported by the nut holding portion by linearly moving in the axial direction. Anchor bolt insertion mechanism that inserts this into the pilot hole and a screw tightener that connects the nut holding part and rotates the nut of the anchor bolt that is inserted in the pilot hole to tighten it. An anchor bolt attachment device comprising: a detection unit that detects a crush amount of the second elastic material ring caused by tightening by a tightening machine. 4. An anchor bolt shaft having a male thread at the tip and a taper portion diverging toward the end, an anchor sleeve that is inserted into the anchor bolt shaft and has a slit formed on the terminal side, and an external thread of the anchor bolt shaft. A threaded nut, a toothed washer having teeth that are inserted into the anchor bolt shaft so as to be located between the anchor sleeve and the nut, and that are engaged with the anchor bolt mounting surface, An elastic material ring which is inserted into the anchor bolt shaft so as to be interposed between the toothed washer and the anchor sleeve, and which frictionally couples the toothed washer and the anchor sleeve with each other by contact with each other. The anchor bolt is mounted on the anchor bolt mounting surface by tightening the nut with a predetermined amount and the anchor sleeve is tapered. The first step of frictionally connecting the toothed washer and the anchor sleeve with the elastic material ring by pressing the toothed washer and the anchor sleeve, and after the first step, the anchor bolt is inserted into the prepared hole to form the toothed washer. A second step of engaging the teeth with the anchor bolt mounting surface, and a third step of further tightening the nut after the second step to expand the diameter of the anchor sleeve and bite into the prepared hole Anchor bolt mounting method characterized by.