Motion guide device clamper mechanism

Patent metadata

Field	Value
Publication number	US-11199207-B2
Application number	US-201816492360-A
Country	US
Kind code	B2
Filing date	Mar 6, 2018
Priority date	Mar 9, 2017
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

The motion guide device clamper mechanism includes a clamper main body connected to the movable member, an inner face having a tapered shape so that the distance between the facing faces is narrower toward the end of one face of the track member, and one rolling member disposed between the facing faces of the one face of the track member and the inner face. The rolling member receives a pressing force toward a position where the distance between the facing faces of one face of the track member and the inner face of the clamper main body is narrow, so that a frictional force based on the taper shape acts on the rolling member, and the restraint of the clamper main body with respect to the track member is performed. Further, a frictional force based upon the taper shape is released and the non-restraint of the clamper is performed.

First claim

The invention claimed is:

1. A motion guide device clamper mechanism including a track member formed to extend in a longitudinal direction, and a movable member attached to the track member via a plurality of rolling members, the movable member being attached to a motion guide device relatively reciprocally movable in the longitudinal direction of the track member, the movable member being restrained/non-restrained at any position in the longitudinal direction of the track member to position the movable member with respect to the track member, the motion guide device clamper mechanism comprising:
a clamper main body connected to the movable member;
an inner face formed on the clamper main body, the inner face facing one face of the track member, the inner face having a tapered shape in a manner in which a distance between the one face of the track member and the inner face is narrower toward an end of the one face of the track member; and
one or more rolling members disposed between the facing faces of the one face of the track member and the inner face, wherein
the one or more rolling members receives a pressing force toward a position where the distance between the one face of the track member and the inner face of the clamper main body is narrow, a frictional force based on the tapered shape acts on the one or more rolling members, and restraint of the clamper main body with respect to the track member is performed, wherein
the frictional force based on the tapered shape is released by retracting the one or more rolling members from a position where the distance between the facing faces of the one face of the track member and the inner face of the clamper main body is narrow, and non-constraint of the clamper main body with respect to the track member is performed, and wherein further,
a member for performing restraint/non-restraint of the clamper main body with respect to the track member is, when viewing the motion guide device from an upper face, formed to extend laterally beyond a dimension in a width direction of the track member, the width direction being a direction orthogonal to the longitudinal direction.

2. A motion guide device clamper mechanism including a track member formed to extend in a longitudinal direction, and a movable member attached to the track member via a plurality of rolling members, the movable member being attached to a motion guide device relatively reciprocally movable in the longitudinal direction of the track member, the movable member being restrained/non-restrained at any position in the longitudinal direction of the track member to position the movable member with respect to the track member, the motion guide device clamper mechanism comprising:
a clamper main body together with the movable member reciprocally movable along the longitudinal direction of the track member; and
a pair of shaft-shaped arm members attached to the clamper main body, wherein
each of the pair of arm members is attached to the clamper main body at one end of each of the shaft-shaped arm members via one pivot shaft, and is made to be pivotable around a line perpendicular to the longitudinal direction of the track member as a pivot axis, wherein
an elastic body having an elastic force so as to be sandwiched by the pair of arm members at the other ends of the shaft-shaped arm members is installed, the pair of arm members pivots ordinarily by an elastic force exerted by the elastic body in a direction in which the other ends of the pair of arm members are away from or come close to each other, and when receiving an external force against the elastic force exerted by the elastic body, the pair of arm members pivots in a direction in which the other ends of the pair of arm members come close to or are away from each other, and is made to be pivotable around the line perpendicular to the longitudinal direction of the track member as the pivot axis, wherein
one or more rolling members are disposed in a freely rolling state between the pivot axis and an installation position of the elastic body of each of the shaft-shaped arm members, wherein
the one or more rolling members are disposed between facing faces of one face of the track member and an inner face formed on the clamper main body, wherein further,
the inner face of the clamper main body is formed to have a tapered shape in a manner in which a distance between the facing faces is narrower toward an end of the one face of the track member, wherein
when the pair of arm members pivots in a direction in which the other ends of the pair of arm members are away by an elastic force exerted by the elastic body or an external force against the elastic force exerted by the elastic body, a frictional force based on the tapered shape acts on the one or more rolling members, the one or more rolling members receiving the elastic force toward a position where the distance between, the facing faces of the one face of the track member and the inner face of the clamper main body is narrow, and restraint of the clamper main body with respect to the track member is performed, wherein
when the pair of arm members pivots in a direction in which the other ends of the pair of arm members come close by an elastic force exerted by the elastic body or an external force against the elastic force exerted by the elastic body, a frictional force based on the tapered shape is released by retracting the one or more rolling members from a position where the distance between the facing faces of the one face of the track member and the inner face of the clamper main body is narrow, and non-restraint of the clamper main body with respect to the track member is performed.

3. The motion guide device clamper mechanism according to claim 2 , wherein
a height dimension of the clamper main body is equal to or smaller than a height dimension of the movable member.

4. The motion guide device clamper mechanism according to claim 3 , wherein
the elastic body is configured as a coil spring.

5. The motion guide device clamper mechanism according to claim 3 , wherein
a wire cable is installed to connect the pair of arm members at the other ends of the axially formed arm members, wherein
the wire cable includes
a wire bridged so as to connect the other ends of the pair of arm members,
a nipple fixedly installed at a distal end of the wire, and
an outer tube covering the wire, the wire being axially movable, wherein
by pulling the wire so as to narrow a distance between the nipple and the outer tube in a state in which the nipple and the outer tube sandwich the other ends of the pair of arm members, an external force against the elastic force exerted by the elastic body is generated, the external force pivoting the arm members in the direction in which the other ends of the pair of arm members come close.

6. The motion guide device clamper mechanism according to claim 3 , wherein
each of the pair of arm members has an engagement shape part at one end of each of the shaft-shaped arm members, wherein
by attaching the pair of arm members to the clamper main body in a manner in which the engagement shape part formed on each of the pair of arm members is in a engaged state, when the arm members pivot in a direction in which the other ends of the pair of the arm members are away from or come close to each other, the pair of arm members pivots in conjunction with each other.

7. The motion guide device clamper mechanism according to claim 2 , wherein
the elastic body is configured as a coil spring.

8. The motion guide device clamper mechanism according to claim 7 , wherein
a wire cable is installed to connect the pair of arm members at the other ends of the axially formed arm members, wherein
the wire cable includes
a wire bri

Assignees

• Thk Co Ltd
• Nabeya Bi Tech Kk

Inventors

• Mochizuki Hiroaki
• Kuribayashi Hiroomi
• Hagiwara Keisuke
• Aoyama Masahiro

Classifications

• F16C29/04 Primary

  Ball or roller bearings · CPC title

• F16D63/00

  Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00 · CPC title

• F16B2/16 Primary

  using rollers or balls {(clamps for rods or tubes telescopically engaged F16B7/1409; used in anti-theft monitors, e.g. as used for articles of clothing in shops E05B73/0017)} · CPC title

• F16C29/10

  Arrangements for locking the bearings · CPC title

• F16C2322/59

  Manipulators, e.g. robot arms · CPC title