SU1456598A2 - Roof bolt setting device - Google Patents

Abstract

The invention relates to the fastening of mine workings and allows for the installation of anchors with threaded shanks without damaging their threads. The device for installing anchor supports includes a housing (K) 1 with a cylindrical shank 2. In the latter, a key 3 is installed. Inside K 1 there is a glass (C) 4. It is pressed by a spring 5. The latter is mounted on a 6 C4 pin. Balls 8 are installed in the holes 7 С4. They are in contact with the conical inner surface K1. Screwed onto the open end K1 of the end face 9 locks C4 with balls 8. Inside C4 is installed razrazna, coupling (PM) 10. It consists of at least three segments with internal thread. The inner diameter of PM 10 corresponds to the outer diameter of the thread of the anchor shank. Inside the PM 10 is made annular grooves. They are placed spring rings 13. Attached to the drill the device from the side of the PM 10 mounted on the threaded shank of the anchor rod 12 with axial force. Under the action of the last C4 is shifted to the bottom of K1. Balls 8, clamping the segments of the PM 10 to the shank of the rod 12, wedge it. The thread PM 10 contacts the thread of the rod 12. The spring rings 13 are compressed. The torsional moment K1 is transmitted by the balls 8 and the segments of the PM 10 to the rod 12. After removing the axial force, the balls 8 release the segments of the PM 10. Under the action of the spring rings 13 they come out of the engagement with the thread of the rod 12. The latter is released. 2 Il. / (L 4ii SP O) cd QD 00 K) 031/1

Description

The invention relates to the fastening of mine workings, namely to the devices of the installation of anchor bolts and is an improvement of the device according to the author. St. No. 1249167.

The aim of the invention is to provide the possibility of installing anchors with threaded shanks without damaging their threads.

 Figure 1 shows a device for installing anchor, General view; figure 2 - section aa in figure 1.

The device for installing anchor supports consists of a housing 1, in which a key 3 is installed in the groove of a cylindrical shank 2. Inside the housing 1 there is a cup 4, preloaded with a spring 5 mounted on the pin 6 of cup 4. In the holes 7 of cup 4, balls 8 are in contact the conical inner surface of the housing 1. The glass 4 with the balls 8 is fixed with the help of the end cap 9 screwed on the open end of the housing 1. The holes 7 for the balls 8 are made around the perimeter of the glass 4.

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Inside the cup 4, the split sleeve 10 with internal thread is installed, and the number of segments 11 is at least three.

The inner diameter of the thread coupling 10 corresponds to the outer diameter of the thread of the shank of the rod 12 anchor

lining. In the annular grooves made on the inner surface of the split sleeve 10, spring rings 13 are placed to pull the internal thread of the segments H of the split sleeve 10 out of contact with the external thread of the shank of the anchor rod 12.

Device for installation of anchor lining works as follows. 45

In the initial (working) position, the cup 4 with the segments 11 of the broken i coupling 10 is in the extreme right position. The segments 11 of the clutch 10 then abut against the cover -9, and the balls 50 8 are freely placed in the holes 7 of the cup 4 ..

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There is a gap between the internal thread of the coupling 10 and the external thread of the shank of the anchor support rod 12, the value of which depends on the number of segments 11,

Before installing the rod 12 in the hole device shank 2 with a key 3 is installed in the socket drive electric drill (not shown). Then, the device on the side of the split sleeve 10 is mounted on the threaded shank of the rod 12. With axial force, under the action of which the cup 4 is displaced to the bottom of the housing 1 in the working position. The balls 8 enter into contact with the inner conical surface of the housing 1, press the segments 11 of the split sleeve 10 onto the threaded shank of the rod 12 and zickle it. Inside, the thread of the coupling 10 comes into contact with the external thread of the shank of the rod 12 of the anchor support, the spring rings 13 are compressed and the torque of the body 1 is transmitted by means of the balls 8 and segmeite 11 of the split coupling 10 to the rod 12.

After removing the axial force, the balls 8 release the segmeites 11 of the split coupling 10, which, under the action of spring rings 13, come out of contact with the external thread of the shank of the rod 12 of the anchor support and release it.

Claims (1)

Invention Formula Device for installation of anchor lining on auth.St. No. 1249167, characterized in that, in order to enable installation of anchors with threaded shanks without damaging them, the thread is provided with a split M5gftoy with internal straps and annular grooves installed in the glass, and the coupling is made at least from three segments with internal thread, the internal diameter of which corresponds to the external diameter of the thread of the anchor shank. Ozig.g