JP3364798B2 - Side knock type sharp pencil - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side-knocking type shearing member in which a knocking member provided on a side surface of a shaft cylinder is pressed in a radial direction of a shaft so that a core can be extended from a tip of a mouthpiece for use.
It is about Pupencil.

[0002]

2. Description of the Related Art A side knock type sharp pencil is provided with a chuck mounting body (chuck top) having a chuck for gripping a core in a shaft cylinder, and an inclined surface is formed at a rear end of the chuck mounting body. The knocking member provided on the side surface of the shaft cylinder presses the inclined surface to advance in the axial direction.
As this knock member, a knock lever provided so as to be swingable in the axial radial direction with the rear end as a fulcrum and a knock button movable vertically along the axial radial direction of the shaft cylinder are generally used. Also in the case of, the chuck is attached to the chuck attachment body that is pressed in the axial direction by the knock member, so that when the attachment body is pressed, the chuck is also pressed in the axial direction at the same time and the axis of the chuck moves. There was a fear. When the knock operation is performed on the core held by the chuck,
Since the elastic core holder (breaker portion) provided in the die projects through the core insertion hole and projects from the tip of the die, the chuck core and the elastic core holder are as described above. If the axis of the core shifts, it becomes difficult to smoothly project the core.

Moreover, since the chuck mounting body slides in the axial direction while being pressed against the inner surface of the shaft cylinder, the sliding surface is easily worn. Therefore, the position of the axis of the chuck mounting body may deviate from the initial fixed position depending on the amount of wear. Due to such a cause, the chuck mounting body and the elastic core holder (breaker portion) may be displaced. There is a case where the center of the sheet shifts and causes the feeding failure as described above.

In Japanese Utility Model Publication No. 55-23900 and Japanese Utility Model Publication No. 60-78490, an engaging element having an inclined surface is formed as a separate body and is inserted into a center shaft or a core guide tube to attach a chuck. Side knock type chassis that is connected to
Puppencil is described. However, since these engaging elements can move freely in the axial length direction, it is necessary to work while holding the engaging elements in the front position with the mouthpiece direction of the shaft tube facing downward when assembling the knock member. Therefore, workability is not good, and it may be troublesome and useless. This is because if the above-mentioned engagement element is displaced toward the rear end of the axial length, it cannot be combined with the knock member.

[0005]

The problems to be solved by the present invention are as follows.
In a side knock type sharp pencil in which a knock member provided on a side surface of a shaft cylinder is pushed to extend a lead forward, a member in which a chuck moves in a shaft radial direction when a knock operation is performed or a chuck is attached. (EN) Provided is a side-knock type sharp pencil in which the sliding surface is pressed against the inner surface of a shaft cylinder by a knock member so that the center is not displaced and the center is not displaced.

[0006]

According to the present invention, a chuck for holding a lead is attached to a chuck attachment body, and the attachment body is pressed by a knock member provided on a side surface of a shaft cylinder so as to be able to be pressed in a radial direction of the shaft. In the side knock type sharp pencil, which is configured to extend the core from the shaft cylinder, an inclined surface member having an inclined surface with which the knock member engages is provided on the outer surface, and one of the chuck mounting body and the inclined surface member is provided. The receiving groove is formed so as to extend in the axial radial direction, and the engaging projection that engages with the receiving groove is formed on the other side so that when the knocking member presses the slope member, the slope member can move in the pressing direction. A side knock type sharp pencil is provided, in which the engaging projection is loosely fitted to attach the slope member to the chuck mounting body, and the above problems are solved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention, in which a breaker portion (3) for frictionally holding a core (2) is frictionally attached to a front portion of a barrel (1). A cap (4) is attached, and a clutch (5) is installed in the barrel (1) from the front.
The chuck (6) having the above is inserted, and the rear end of the chuck (6) is fixed to the chuck mounting body (7), and the mounting body (7)
A spring (9) is provided between the chuck and the inner stage portion (8) of the shaft cylinder (1) so as to bias the chuck mounting body (7) rearward, and the chuck mounting body (7) is moved forward to advance the chuck. The core (2) in the core insertion portion (10) of the attachment body (7) is fed from the tip through a core insertion hole (11) of the base (4) as is known. In the figure, the inside of the shaft cylinder (1) behind the chuck mounting body (7) is the core tank (12), but the chuck mounting body (7) can be used as the core tank.

In the chuck mounting body (7), the front and rear flanges (13) and (14) are inscribed substantially in the inner surface of the barrel (1) and the long groove (15) formed in the barrel (1). A projection (16) provided on the flange is fitted into the flange so as to be slidable in the axial direction.

A knock member (17) for moving the chuck mounting body (7) in the axial direction is provided in an opening (18) provided on the side surface of the shaft cylinder (1) so as to be able to be pressed in the radial direction of the shaft. ing. The knock member (17) shown in the figure is a knock lever (20) provided with a fulcrum (19) at the rear end that engages with the edge of the opening (18) and is swingable in the axial radial direction. It is also possible to use a knock button (not shown) provided in the opening (18) so as to be vertically movable.

Separately from the chuck mounting body (7), the action of the knocking member (17) on the outer surface is pushed by the knocking member (17) to move the chuck mounting body (7) in the axial direction. An inclined surface member (23) having an inclined surface (22) with which the portion (21) is engaged is formed. The slope member and the chuck mounting body can be made of different plastic materials.

The chuck mounting body (7) and the slope member (23)
For mounting, at least one member is formed with a receiving groove extending in the axial radial direction, the other member is formed with an engaging projection for engaging with the receiving groove, and the knocking member (17) is provided in the axial radial direction. An engaging projection is loosely fitted in the receiving groove so that the slope member (23) can be moved by a small amount in the pressing direction when the slope member (23) is pressed.

In the embodiment shown in FIG. 1 and the like, the receiving groove and the engaging projection are formed complementary to the respective members, and these are loosely fitted. That is, the chuck mounting body (7) has a front flange (13) as shown in FIG.
A receiving groove (24) is provided at the rear of the receiving groove (24), and an engaging projection (25) is provided following the receiving groove (24). Further, as shown in FIG. 3, the slope member (23) has a core insertion portion (1) of the chuck mounting body (7).
(0) in front of the guide groove (27) that fits in the front part (26)
8) is formed and a receiving groove (29) is formed behind it. Then, the engaging projection (28) of the slope member (23) is loosely fitted in the receiving groove (24) of the chuck mounting body (7), and the engaging projection (25) of the chuck mounting body (7) is attached to the slope member ( It is loosely fitted in the receiving groove (29) of 23).

FIG. 5 shows another embodiment, in which an engaging projection (30) is formed on the chuck mounting body (7) and a slope member (23) is formed.
The engaging projection (30) may be loosely fitted in the receiving groove (31) formed in (Fig. 5 (A)), or the receiving groove may be formed in the chuck mounting body (7).
(32) may be formed so that the engaging projection (33) formed on the slope member (23) is loosely fitted in the receiving groove (32) (FIG. 5).
(B)).

The engaging projection may be left loosely fitted in the receiving groove, but it is preferable to provide an engaging portion for preventing fall so that the engaging projection is engaged. In the embodiment shown in the figure, the receiving grooves (24), (29), (3
1), a concave portion (34) is formed on the inner surface of (32), and a convex portion (35) fitted in the concave portion (34) is formed into an engaging projection (25), (28), (30), (33). It is formed on the outer side surface so that when the concave portion (34) and the convex portion (35) are engaged with each other, play (36) is generated in the pressing direction of the knock member. You can

The slope member (23) is provided with the guide groove (2
On the outer surface on the bottom side of 7), the long groove (1
5) having a protrusion (37) for engaging with, and an edge of the guide groove (27)
(38) is adapted to be in sliding contact with the sloped surface (39) provided on the core insertion portion (10) of the chuck mounting body (7).

When the slope member (23) is attached to the chuck mounting body (7) by loosely fitting the receiving groove and the engaging projection, the slope member (23) does not move in the axial direction. The assembling work is easy, and the assembling of the knock member is not hindered. When using the knock member (1
When 7) is pressed in the axial direction, only the inclined surface member (23) is sandwiched between the inner surface of the shaft cylinder and the knock member, and the chuck mounting body (7) is not pressed in the axial direction but moves in the axial direction. Nor.

[0017]

The present invention is constructed as described above, and the chuck for holding the core is attached to the chuck mounting body, and the mounting body is pressed by the knock member provided on the side surface of the shaft cylinder so as to be capable of being pressed in the axial radial direction. In a side knock type sharp pencil in which a core is extended from a shaft cylinder, an inclined surface member having an inclined surface with which the knock member engages is provided on an outer surface, and a shaft is provided on either one of the chuck mounting body and the inclined surface member. A receiving groove that extends in the radial direction is formed, and an engaging projection that engages with the receiving groove is formed on the other side, and when the slope member is pressed by the knock member, the receiving member is moved in the pressing direction in the receiving groove. Since the slanting member is attached to the chuck mounting body by loosely fitting the engaging projection, when the knocking member is pressed, the slanting member is only sandwiched between the knocking member and the inner surface of the shaft cylinder, and the chuck mounting body has a shaft. Radial direction It is possible to prevent the pressing force from acting.Therefore, the centers of the core insertion holes of the chuck and the die are displaced so that the core is difficult to come out, or the chuck mounting body is greatly worn away from the fixed position to one side and It is possible to use it lightly without causing a failure such that the center of the core insertion hole is displaced. In addition, since the slope member does not move in the axial direction with the slope member attached to the chuck mounting body during assembly, the assembly work is simple and there is no risk of wasted cost.

Since the conventional chuck piece generally uses a special plastic material in order to improve the sliding of the slope portion and the knock member, it is costly to form the chuck mounting portion and the slope portion integrally as in the conventional case. However, since the present invention has a structure in which the slope member is separately formed and attached as described above, only the slope member needs to be made of such a special plastic material and can be economically manufactured. .

[Brief description of drawings]

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

FIG. 2 shows a chuck mounting body, (A) is a side view,
(B) is a front view.

FIG. 3 shows a slope member, (A) is a side view, (B) is a front view, and (C) is a bottom view.

FIG. 4 shows a state in which a slope member is attached to the chuck attachment body, (A) is a side view, and (B) is a front view.

5A and 5B show another embodiment of a state where the chuck mounting body and the slope member are mounted, and FIGS. 5A and 5B are partial side views.

FIG. 6 is an explanatory view showing an engaging portion of a receiving groove and an engaging protrusion.

[Explanation of symbols]

1-axis cylinder 7 Chuck mounting body 17 Knock member 21 Inclined surface 23 Slope member 24,29,31,32 receiving groove 25,28,30,33 Engagement protrusion

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B43K 21/00-21/26 B43K 24/08

Claims (3)

(57) [Claims] 1. A chuck for holding a core is attached to a chuck mounting body, and the mounting body is pushed out by a knock member provided on a side surface of the shaft cylinder so as to be capable of pressing in a radial direction of the shaft so as to extend the core from the shaft cylinder. In side knock type sharp pencil,
An outer surface is provided with an inclined surface member having an inclined surface with which the knock member is engaged, and one of the chuck mounting body and the inclined surface member is formed with a receiving groove extending in the axial direction and the other is engaged with the receiving groove. The engaging projection is formed, and the engaging projection is loosely fitted in the receiving groove so that the inclined member can be moved in the pressing direction when the inclined member is pressed by the knock member. Side knock type sharpening pencil. 2. The side knock type sharp pencil according to claim 1, wherein the receiving groove and the engaging projection are engaged by an engaging portion for preventing fall. 3. The chuck mounting body and the slope member have complementary receiving grooves and engaging protrusions, respectively, and the receiving member and the engaging protrusion are loosely fitted to attach the slope member to the chuck mounting body. Item 3. The side knock type sharp pencil according to Item 1 or 2.