JP4312532B2 - Centering machine for holder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a core sharpening device for sharpening a tip of a holder mainly used for drawing or the like by causing a thick core to protrude from a tip of a chuck.
[0002]
[Prior art]
[Patent Document 1]
Japanese Utility Model 7-5795
[Patent Document 2]
JP 2001-96986 A
Conventionally, Patent Document 1 is known as a centering machine for a holder.
In Patent Document 1, since a conventional pick-type core sharpener is small and has a problem that it is easily held and lost during use and a problem in the processing of shavings, a sealed container body with a lid made of synthetic resin or the like and a lid portion With a hole in the center upper part of the lid, press-fitting a pinch type core cutter into the hole to hold it detachably in a sealed state, and a cross-shaped small cut There has been proposed a cover made of an elastic body such as rubber and attached so as to close a core insertion hole of a pick type core sharpener.
Patent Document 2 is known as a portable pencil sharpener.
In Patent Document 2, a cap that closes an opening of a main body that stores shavings is provided so as to be rotatable with respect to the main body, and a shaving tool is provided inside the cap, and the shaving tool is removed from the main body by opening and closing the cap. Caps that close the top and bottom openings of the main body are provided rotatably at both ends of the mounting part that can be moved in and out, and a shaving tool is placed inside the bottom cap. What is provided is shown.
[0003]
[Problems to be solved by the invention]
The one disclosed in Patent Document 1 is configured to insert a core tip into a core insertion hole of a pick-type core sharpener by inserting a small cross-shaped cut in a cover made of an elastic body such as rubber. There is a possibility that the cut portion will be slightly opened when repeated loading and unloading. In that case, since the core shavings are powdery, they spill out from a slight gap and there is a problem of soiling the surroundings. The thing shown by patent document 2 is comprised so that the cap provided in the lower end of the main body may open large and throw away shavings. Since this is a pencil sharpener, most of the shavings are large wood chips, which are good for quickly throwing away the shavings without getting caught in the opening. However, in the case of a centering machine, the shavings are in powder form and are easily scattered in the main body container and adhere to the inner wall of the container. Therefore, when the cap at the lower end is opened suddenly, powdered shavings scatter and cause a problem of soiling the hands, containers and surroundings. Further, even when the upper end cap is suddenly opened, there is a possibility that powdered shavings adhering to the periphery of the opening will be scattered and dirty the hand, the container and the surroundings.
An object of the present invention is to solve the above problems.
[0004]
[Means for Solving the Problems]
The present invention has the following configuration in order to achieve the above-described problems.
The centering machine for a holder according to the first aspect of the present invention is such that a cap that opens and closes a core insertion side for centering a main body that stores shavings is rotated in a horizontal direction with respect to the axial direction of the main body. A centering unit is provided inside the main body, and an opening hole communicating with the centering unit is closed or opened by opening and closing the cap.
[0005]
The centering device for a holder according to the invention described in claim 2 is the centering device for a holder according to claim 1, wherein one end of the upper portion of the main body is attached to one end of the lower portion of the cap by an elastic body. And one end of the lower part of the cap is slightly movable relative to one end of the upper part of the main body, and an opening hole is provided at the other end opposite to one end of the upper part of the main body. A convex portion is provided at the other end opposite to one end of the lower portion of the cap, and the convex portion of the cap can be blocked by the opening hole of the main body when the cap is closed with respect to the main body.
[0006]
A centering device for a holder according to a third aspect of the present invention is the centering device for a holder according to the first aspect, wherein a discharge is provided in a discharge hole provided on the shavings discharge side of the main body. A funnel-shaped taper portion is provided at the entrance of the hole.
[0007]
A centering device for a holder according to a fourth aspect of the present invention is the centering device for a holder according to the first aspect, wherein a discharge is provided in a discharge hole provided on the shavings discharge side of the main body. A slider-type lid is provided to open and close the outlet of the hole.
[0008]
【Example】
FIGS. 1 to 5 show a centering machine for a holder according to an embodiment of the present invention.
In the centering machine for the holder of the embodiment, a cap 2 is provided on the core insertion side of the main body 1 for storing shavings so as to be rotatable in the horizontal direction with respect to the axial direction of the main body.
A centering unit 7 is provided inside the main body 1, and an opening 1 c communicating with the centering unit 7 is closed or opened by opening and closing the cap 2.
[0009]
The main body 1 is an oval cylindrical body that is open at the rear. A hole 1b is formed in a flat portion at one end in the major axis direction of the upper end wall 1a serving as the upper portion of the main body, and the other end through an inclined surface inclined downward. An opening hole 1c is formed in the flat portion to penetrate through the inner hole of the elliptical cylindrical body.
Further, rectangular cutouts 1d are formed on both side surfaces of the lower end long diameter side of the cylindrical body, and protrusion locking portions 1e are provided at required locations on the circumferential surface of the cylindrical body behind the cutout 1d.
The hole 1b is a shallow hole as shown, and a small hole 1f having a slightly smaller diameter is provided through the inner hole of the elliptical cylindrical body at the bottom of the hole.
[0010]
The cap 2 has an elliptical cylindrical portion 2b that follows the main body 1, and the lower portion of the cap is formed in a shape facing the upper portion of the main body. Further, a short cylindrical bearing portion 2a is formed to bulge forward at one end of the lower portion of the cap, and a spherical convex portion 2d is formed at the other end facing it. Further, a hole 2e having a slightly larger diameter communicating with the small hole 2f from the lower end is provided through the rear end of the shaft center of the bearing portion 2a, and the other end side of the bearing portion 2a is surrounded by an elliptical wall portion. A cylindrical portion 2b having a curved shape is formed, and a rib 2c is provided at a peripheral portion of the cylindrical portion 2b.
[0011]
The rotary shaft 3 has a disc-shaped flange portion 3a forming a step portion at the rear end of the shaft portion 3b, a shaft portion 3c having a slightly smaller diameter below the shaft portion 3b, and further a shaft portion 3c. An umbrella-shaped collar 3d is formed at the lower end of the flange 3d, and a slit 3e having an appropriate length is hung from the lower end of the collar 3d to the shaft 3c so that the outer periphery of the collar 3d can be elastically reduced in diameter. Is provided.
[0012]
As described above, the lower end of the cap 2 is placed on the upper end of the main body 1, the bearing portion 2a of the cap is fitted into the hole 1b of the main body, the lower step portion of the flange portion 3a of the rotating shaft 3, and the upper surface of the lower end portion of the cap 2 And the lower part of the shaft part 3b of the rotating shaft is fitted into the hole 2e of the bearing part, and the shaft part 2f passes through the small hole 2f and the small hole 1f of the main body at the same time, With the spring 8 appropriately compressed, the umbrella-shaped collar 3d is locked to the inner surface of the upper end wall 1a of the main body, the lower part of the cap is urged against the upper end wall of the main body, and the cap 2 has the rotating shaft 3 As a result, the shaft 2 is pivotably supported in a horizontal direction with respect to the axial direction of the main body 1, and the bearing portion 2 a can be slightly moved up against the pressing force of the spring 8. Therefore, when the cap 2 is closed with respect to the main body 1, the convex portion 2 d of the cap is closely fitted into the opening hole 1 c of the main body to close the opening hole 1 c.
[0013]
Further, the cap cover 4 is attached to the outer periphery of the cylindrical portion 2b surrounded by the elliptical wall portion of the cap 2 by engaging with the rib 2c provided at a required portion on the peripheral surface of the cylindrical portion 2b.
The cap cover 4 also has an elliptical cylindrical portion that follows the main body 1, and the lower portion of the cap cover is formed to face the upper portion of the main body.
[0014]
The tail plug 5 has a rectangular handle portion 5d having a short oval cylindrical portion 5a that follows the inner periphery of the main body 1 and an outer peripheral portion that follows the outer peripheral surface of the main body on both peripheral surfaces on the lower major axis side of the cylindrical portion 5a. An opening is formed in one handle portion 5d, and a guide groove 5i extends to the vicinity of the other handle portion. A plate-like lid 6 is slidably inserted in the guide groove 5i (for example, a well-known T groove or dovetail groove) in the horizontal direction, and a lock engaging portion is provided if necessary. Moreover, the latching | locking part 5e which has the circumferential groove | channel in the cylinder part 5a upper end side surrounding surface is formed. Moreover, the substantially rectangular recessed part 5c is formed in the both ends of the hole 5b and the hole 5b in the upper end of the cylinder part 5a, and the rib 5h is suitably provided in the surrounding wall of the recessed part 5c.
Furthermore, a funnel-shaped taper portion 5f is formed in the lower portion of the hole portion 5b so as to concentrate on the discharge hole 5g, and the lower end of the discharge hole 5g is opened with the lid 6 being pulled out. The shavings can be discharged.
[0015]
The centering unit 7 has a rectangular plate shape, is provided with a cutting blade 7a on the upper side, and is provided with a core insertion hole at the upper end thereof.
The centering unit 7 is fitted to the recess 5c of the tail plug 5 on both sides of the lower part of the centering unit 7 so as to engage with the rib 5h provided in the recess 5c so as not to be inadvertently detached. In this state, the tail plug 5 is inserted from the lower part of the main body 1, the handle part 5d of the tail plug is fitted into the notch 1b of the main body, and the locking part 5e on the outer periphery of the tail plug is connected to the locking part 1e on the inner periphery of the main body. The tail plug 5 is detachably fixed to the main body 1 by being elastically engaged. At that time, the core insertion hole 7b of the core cutting unit 7 is in a state of facing the opening hole 1c of the main body 1.
[0016]
The centering device for a holder of the present invention is configured as described above, but is not limited to the above-described embodiment. For example, the main body is not limited to an elliptical cylindrical body, and may be a circle, a polygon, or the like. Further, it is not limited that the shape of the main body and the shape of the cap or tail plug are imitated. Incidentally, the cap and the cap cover can be integrally formed.
It is also possible to provide a rotating shaft integrally with the cap so as to be pivotally fixed to the upper end of the main body. It is also possible to provide the cap so that it moves slightly upward relative to the upper part of the main body. Alternatively, the spring may be an elastic body such as rubber, or the shaft between the upper part of the main body (resin molded product) and the lower part of the cap (molded product). This can be achieved by forming an integral elastic portion on the supported portion. Further, the main body and the tail plug can be provided integrally, and the upper part of the main body can be provided detachably, or the lid provided on the tail plug can be provided so as to open and close the discharge hole by rotation.
[0017]
[Action]
The centering tool for the holder of the present invention opens and closes the core insertion side by rotating the cap 2 in the horizontal direction with respect to the axial direction of the main body 1, so that there is no fear of accidentally spilling shavings. In addition, when the cap 2 is closed, the opening 1c of the main body 1 into which the core is inserted is closed by the convex portion 2d of the cap 2, so that there is no problem that the powdered shavings of the core are scattered and contaminated on the inner surface of the cap. In addition, since one end of the lower part of the cap is urged by an elastic body at one end of the upper part of the main body and is pivotally pivoted, other than the opening hole 1c provided at the other end of the upper part of the main body and the lower part of the cap The convex portion 2d provided at the end is engaged in an appropriate state, and there is no wear of the engaging portion when the opening and closing is repeated. It is possible to have it.
[0018]
Further, in the discharge hole 5g provided on the shavings discharge side of the main body 1, the funnel-shaped taper portion 5f is provided at the entrance of the discharge hole 5g, so that the powdered shavings are collected in the discharge hole 5g. Thus, by opening the slider-type lid 6, it becomes easy to discharge the powdered shavings without scattering.
[0019]
【The invention's effect】
The centering machine for a holder of the present invention is configured as described above, and there is no possibility that powdered shavings will be scattered and soiled around when the cap is opened and closed.
In addition, powdered shavings scattered in the main body can be easily collected in the discharge hole and discharged without polluting the surroundings.
Moreover, since the opening hole provided at the other end of the upper body and the convex part provided at the other end of the lower part of the cap are engaged in an appropriate state, a stable opening / closing and locking state can be obtained over a long period of time. It is possible to give a click feeling of engaging and disengaging the engaging portion with a good feel.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing the entire centering machine for a holder according to an embodiment of the present invention.
FIG. 2 is a perspective view showing the development of the parts of the centering machine for the holder according to the embodiment.
FIG. 3 is a cross-sectional view of a tail plug used in a centering machine for a holder according to an embodiment.
FIG. 4 is a top view of the tail plug.
FIG. 5 is a perspective view showing an appearance of a tail plug.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 1a Upper end wall 1b Hole part 1c Opening hole 1d Notch part 1e Locking part 1f Small hole 2 Cap 2a Bearing part 2b Cylindrical part 2c Rib 2d Convex part 2e Hole 2f Small hole 3 Rotating shaft 3a Gutter part 3b Shaft part 3c Shaft Part 3d collar part 3e slot 4 cap cover 5 tail plug 5a cylinder part 5b hole part 5c recess part 5d handle part 5e locking part 5f funnel-shaped taper part 5g discharge hole 5h rib 5i guide groove 6 lid 7 core cutting unit 7a shaving Blade 8 Spring

Claims (3)

A cap that opens and closes the core insertion side for core cutting of the main body for storing shavings is provided to be rotatable in a horizontal direction with respect to the axial direction of the main body, and a centering unit is provided inside the main body, and the cap An opening hole communicating with the centering unit is closed or opened by opening and closing the door, and one end of the lower part of the cap is urged by an elastic body into one end at the upper part of the main body and is pivotally fixed. One end of the lower part of the cap is slightly movable relative to one end of the upper part of the main body, an opening hole is provided in the other end facing the one end of the upper part of the main body, and the other end facing the one end of the lower part of the cap A centering machine for a holder which is provided with a convex portion and the convex portion of the cap closes the opening hole of the main body when the cap is closed with respect to the main body. The centering machine for a holder according to claim 1, wherein a funnel-shaped taper portion is provided at an entrance of the discharge hole in the discharge hole provided on the shavings discharge side of the main body. The centering machine for a holder according to claim 1, wherein a slider-type lid is provided in the discharge hole provided on the shavings discharge side of the main body so that the outlet of the discharge hole can be freely opened and closed.

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