JPH0258949U

JPH0258949U -

Info

Publication number: JPH0258949U
Application number: JP13690388U
Authority: JP
Priority date: 1988-10-20
Filing date: 1988-10-20
Publication date: 1990-04-27
Anticipated expiration: 2003-10-20
Also published as: JP2525097Y2

Description

[Brief explanation of drawings]

第１〜５図は本考案の一実施例を示すもので、
第１図は一部切欠正面図、第２図は平面図、第３
図は係止部材の構成を示す断面図、第４図は第３
図Ａ―Ａ線断面図、第５図は係合部と固定部との
係合状態を説明する拡大断面図、第６〜８図は本
考案の他の実施例を示すもので、第６図は一部切
欠正面図、第７図は平面図、第８図は第６図Ｂ―
Ｂ線断面図である。１……駆動軸、２……回転部材、２ａ……スプ
ロケツト、３……シヤーシ体、７……係止部材（
摺動体）、７ａ……係合部、７ｂ……ローレツト
、９……固定部、９ａ……ローレツト、９ｂ……
他側面、１０，２０……トラクタユニツト、１２
……回転部材、１２ａ……スプロケツト、１３…
…シヤーシ体、１３ｂ……突起、１７……係止部
材（レバー）、１７ａ……係合部、１７ｂ……ロ
ーレツト。 Figures 1 to 5 show an embodiment of the present invention.
Figure 1 is a partially cutaway front view, Figure 2 is a plan view, and Figure 3 is a partially cutaway front view.
The figure is a sectional view showing the configuration of the locking member, and FIG.
FIG. 5 is an enlarged sectional view illustrating the state of engagement between the engaging part and the fixing part, and FIGS. 6 to 8 show other embodiments of the present invention. The figure is a partially cutaway front view, Figure 7 is a plan view, and Figure 8 is Figure 6B.
It is a sectional view taken along the B line. 1... Drive shaft, 2... Rotating member, 2a... Sprocket, 3... Chassis body, 7... Locking member (
sliding body), 7a...engaging part, 7b...knurling, 9...fixing part, 9a...knurling, 9b...
Other side, 10, 20... Tractor unit, 12
...Rotating member, 12a... Sprocket, 13...
... Chassis body, 13b ... Protrusion, 17 ... Locking member (lever), 17a ... Engagement part, 17b ... Knurling.

Claims

[Claims for Utility Model Registration] (1) A drive shaft that is rotationally driven during paper feeding, a rotating member that is fitted to the drive shaft so as to be relatively non-rotatable and movable in the axial direction, and recording paper. A plurality of sprockets are provided so as to be able to engage with the perforations of the rotary member, and are sequentially sent in the rotation direction as the rotary member rotates, and a plurality of sprockets are provided so as to be movable in the axial direction of the drive shaft, and a tractor unit having a chassis body sandwiching the drive shaft from both sides, a fixed part extending parallel to the drive shaft, and a tractor unit movably provided on the chassis body and engageable with the fixed part. 1. A tractor mechanism comprising: a locking member having an engaging portion, the engaging portion engaging with the fixing portion to immovably fix the tractor unit. (2) The tractor mechanism according to claim 1, wherein the sprocket is formed on an outer peripheral surface of the rotating member. (3) In claim 1, the tractor unit has a second rotating member that rotates in conjunction with the rotating member, and the sprocket is attached to the outer peripheral surface of an endless belt wound around both of the rotating members. A tractor mechanism characterized in that: (4) In any one of claims 1 to 3, the fixing part is a protrusion, the locking member is slidably provided on a side surface of the chassis body, and the engaging part is attached to the fixing part. A tractor mechanism characterized by having a forked shape that can be clamped. (5) In any one of claims 1 to 3, the fixing part is a protrusion, the locking member is rotatably provided on a side surface of the chassis body, and the engaging part is attached to the fixing part. The chassis body is provided with a protrusion that is engageable with the other side of the fixed part and cooperates with the engaging part to clamp the fixed part. Features a tractor mechanism. (6) The tractor mechanism according to any one of claims 1 to 5, wherein the engaging portion and the fixing portion are each formed with a knurl that can be engaged with each other.