JPH0682433U - Dust protection device for rolling bearings for linear motion - Google Patents

Abstract

(57) [Abstract] [Purpose] A rail guide is fitted on the guide rail, and balls are inserted in the ball rolling grooves provided on the opposite surfaces of the guide rail. Avoid sticking. [Structure] In the loader device, a main body of a loader arm that moves up and down has a U-shaped cross section. A ball is inserted between the rail and the rail guide facing each other, and a flat toothed belt with a width sufficient to close the U-shaped opening is fixed at one end to the upper end of the loader arm opening, and the middle is provided on the carrier. It is wound around a drive pulley and the other end is fixed to the lower end of the loader arm.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention particularly relates to a dust proof device for a linear motion rolling bearing used for vertically moving a loader arm in a loader device.

[0002]

[Prior art]

 FIG. 3 shows a conventional loader device, in which a beam 1 is provided with a carrier 2 which is slidable in the left-right direction, a carrier 2 is provided with a loader arm 3 which is vertically movable, and a work gripper is provided below the loader arm 3. Has claws. A guide rail 4 is fixed to the loader arm 3 along the longitudinal direction thereof, and a rail guide 5 which is externally fitted to the guide rail 4 is fixed to the carrier 2 and faces the guide rail 4 and the rail guide 5 facing each other. Ball rolling grooves are provided in the ball bearings, and balls 8 are inserted between the ball rolling grooves to form a linear motion rolling bearing. The screw shaft 6 is rotatably supported by the members protruding laterally from both upper and lower ends, and the nut screwed to the screw shaft 6 is fixed to the carrier 2, and the screw shaft 6 is rotated by a motor (not shown). When rotated, the loader arm 3 is raised or lowered. Further, the bellows type cover 7 is attached so that foreign matter such as dust does not reach the rolling bearing for linear movement.

[0003]

[Problems to be solved by the device]

 The above-mentioned conventional bellows type cover has a drawback that the size becomes large. Therefore, the present invention intends to provide a dustproof device for a linear motion rolling bearing which is relatively small in size, inexpensive, and capable of reliably achieving the dustproof purpose.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has a guide rail fixed to the inner bottom surface of a loader arm main body having a U-shaped cross section in the longitudinal direction, and a rail guide fitted to the guide rail fixed to a carrier. A ball is inserted between the guide rail and the rail guide facing each other, and a toothed flat belt having a width sufficient to close the opening of the loader arm is fixed at one end to the upper end of the loader arm opening, and the middle is provided on the carrier. It is wound around a drive pulley and the other end is fixed to the lower end of the loader arm.

[0005]

[Action]

 The loader arm is moved up and down via the flat belt by the forward and reverse rotations of the drive pulley, and the linear motion rolling bearing is always contained in the space enclosed by the bottom of the U-shaped cross section, both sides, and the belt. , It is not damaged by dust or other foreign matter from the outside.

[0006]

【Example】

 Examples will be described with reference to the drawings. 1 and 2, a carrier 2 is provided on the beam 1 so as to be slidable in the left-right direction, and a loader arm 3 is provided on the carrier 2 so as to be vertically movable. The main body of the loader arm 3 has a U-shaped cross section, a guide rail 4 is fixed to its inner bottom surface 8 in the longitudinal direction, and a rail guide 5 fitted onto the guide rail 4 is fixed to the carrier 2. Ball rolling grooves 9 and 10 are provided on the opposing surfaces of the guide rail 4 and the rail guide 5, and a ball 11 is inserted between the ball rolling grooves 9 and 10 to form a linear motion rolling bearing. Has been done. Reference numeral 12 denotes a toothed flat belt having a width of a size for closing the opening 13 of the main body of the loader arm 3 having a U-shaped cross section and having an uneven back surface. Reference numeral 14 is a drive pulley having an unevenness around which the toothed flat belt 12 is wound. The flat belt 12 has one end fixed to the upper end of the opening 13 with a bolt 15, the middle wound around the drive pulley 14, and the other end fixed to the lower end of the opening 13 with a bolt 16. Reference numeral 17 is an embedded member, and 18 is a guide pulley. When the drive pulley 14 is driven by the forward / reverse rotation motor 19 attached to the carrier 2, the loader arm 3 is raised or lowered via the flat belt 12.

[0007]

[Effect of device]

 Since the linear motion rolling bearing is housed in the abdomen of the loader arm body and the opening of the abdomen is closed by the flat belt that moves the loader arm up and down, it is possible to provide a compact and inexpensive dustproof device.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a vertical sectional view of a conventional dustproof device.

[Explanation of symbols]

 2 carrier 3 loader arm 4 guide rail 5 rail guide 8 inner bottom surface 12 flat belt 13 opening 14 drive pulley 18 guide pulley

Claims (1)

[Scope of utility model registration request] 1. A guide rail is fixed to an inner bottom surface of a loader arm body having a U-shaped cross section in a longitudinal direction thereof, and a rail guide fitted to the guide rail is fixed to a carrier body. A pole is inserted between the face of the loader arm and the toothed flat belt with a width sufficient to close the opening of the loader arm, and one end of the belt is fixed to the upper end of the loader arm opening. A dust-proof device for a linear motion rolling bearing, which is wound around and fixed at the other end to the lower end of a loader arm.