JP3042520U - shredder - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a shredder that can smoothly and easily cut even cut paper such as officially made postcards. SOLUTION: A pair of feed cutting rollers 1 and 1 having a motor and a shaft portion 2 and a plurality of disc blade portions 3 provided on the shaft portion 2 at a predetermined pitch while being rotated by the motor.
And. Further, the shaft portion 2 and the disc blade portion 3 are integrally molded, and the concave peripheral groove 4 is formed on the outer peripheral surface of the disc blade portion 3 to form the acute peripheral corners 5 and 5 on both sides of the concave peripheral groove 4. Use a sharp edge.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a desktop shredder that cuts postcards manufactured by government.

[0002]

[Prior art]

 As shown in FIG. 8, a conventional table-type shredder has a pair of motors, a shaft portion a and disc blade portions b provided on the shaft portion a at a predetermined pitch, which are rotated by the motor. The feed cutting rollers c and c were provided, and a large number of small grooves d were formed along the outer peripheral surface of the disc blade portion b. Further, the disc blade portions b ... of the lower feed cutting roller c are slightly inserted between the disc blade portions b ... of the upper feed cutting roller c, and the disc blade portions b ... When the upper and lower feed cutting rollers c, c rotate positively (rotate inward with respect to each other), the paper to be cut is drawn at the outer peripheral corners e, e of the upper and lower disc blades b. Was there.

[0003]

[Problems to be solved by the device]

 However, since the cutting target paper is pressed by the entire disc blade portion b, the cutting force is dispersed over the entire blade portion b, and the resilience resistance due to the elasticity of the cutting target paper increases, which is a drawback. If you cut a piece of cut paper (such as a postcard or envelope made by government) or a piece of paper that is hard and has high repulsive force (such as a photo or a postcard with a photo), the cutting torque of the feed cutting rollers c, c increases. However, it put a load on the motor, and sometimes the motor stopped.

Therefore, an object of the present invention is to provide a shredder that can smoothly and easily cut even cut paper such as postcards made by government.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a shredder according to the present invention comprises a pair of motors, a pair of disk blades that are rotated by the motor and that have a shaft portion and a plurality of disc blade portions provided at a predetermined pitch on the shaft portion. In a shredder provided with a feed cutting roller, the shaft portion and the disc blade portion are integrally formed, and a concave circumferential groove is formed on the outer peripheral surface of the disc blade portion to form the concave circumference. The outer peripheral corners on both sides of the groove are sharp edges.

Further, the width of the outer peripheral corner portion is 0.5 mm or less. Further, a large number of small grooves are provided along the outer peripheral corners.

[0007]

[Embodiment of the invention]

 Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments.

1 and 2 show an embodiment of a shredder according to the present invention. The shredder includes a motor M, a pair of feed cutting rollers 1 and 1 rotated by the motor M, and a motor M. A power transmission rotating body 6 (for example, a reduction gear group) for transmitting the rotation torque to the cutting rollers 1 and 1 is provided inside the casing 7, and the paper waste after cutting (cutting) is provided behind the casing 7. A storage cover 12 for storing is detachably attached.

The feed cutting roller 1 has a shaft portion 2 and a plurality of disc blade portions 3 provided on the shaft portion 2 at a predetermined pitch, and the shaft portion 2 and each disc blade portion 3 are integrated. It is molded. The disc blade portions 3 ... of the lower feed / cut roller 1 slightly interpose between the disc blade portions 3 ... of the upper feed / cut roller 1, and are arranged alternately. Details will be described later.

Inside the casing 7, a battery housing 8 and a connection terminal 9 for supplying external electric power are provided, and a switch 10 for rotating and stopping the motor M forward and backward is provided on the front wall 11 a of the casing 7. It penetrates through and is projected forward.

Further, as shown in FIGS. 1 to 3, the upper and lower walls 11 a and 11 b of the casing 7 have upper and lower feed cutting rollers 1 and 1 inside the casing 7 for passing cut sheets between them. The front insertion hole 13a and the rear insertion hole 13b (in the lateral direction) are provided, and the front and rear insertion holes 13a and 13b are provided beside each of the front insertion holes 13a and 13b for cutting by passing the edge of the cut paper. A rearward groove portion 22 is provided.

Further, a pair of guide plates 15 and 15 having a plurality of slits 14 through which the upper and lower disc blade portions 3 are inserted are provided between the upper and lower feed cutting rollers 1 and 1. This guide plate 15 has an inclined portion, a parallel portion, and an L-shaped curved portion in order from the front end to the rear end, and the upper and lower guide plates 15 and 15 are turned upside down, and the front of the casing 7 is The rear insertion holes 13a and 13b are respectively inserted and mounted in the mounting groove portions 16 provided along the upper and lower edges of the openings.

As shown in FIGS. 1 and 2, the shredder of the present invention has a concave groove 4 having a curved surface formed on the outer peripheral surface of the disc blade portion 3 of the feed cutting roller 1. The outer peripheral corner portions 5 and 5 on both sides of the concave peripheral groove 4 are sharp edges. The width W of the peripheral corner portion 5 is preferably 0.5 mm or less. (This is because if the width W exceeds 0.5 mm, it will be difficult to cut smoothly as described later.) Furthermore, a large number of small grooves 17 are provided along the outer peripheral corners 5 and 5.

Further, the attachment structure of the feed cutting roller 1 will be described. The shaft portion 2 has thin shaft portions 18 and 18 having reduced diameters at both ends thereof. The thin shaft portions 18, 18 are rotatably supported by penetrating through the protruding vertical mounting walls 19, 19. The one end 20a of the thin shaft portion 18 penetrating the one vertical mounting wall 19 has the dynamic transmission rotating body 6 (gear) fixed and retained, and the thin shaft portion penetrating the other vertical mounting wall 19 A disk blade 21 having a large number of small grooves 26 formed along the outer peripheral edge is fixed to the other end 20b of the portion 18.

The upper and lower power transmission rotating bodies 6 and 6 attached to the ends 20a and 20a of the upper and lower feed cutting rollers 1 and 1 are meshed with each other, and the rotational torque from the motor M is fed and cut. It is transmitted to the rollers 1 and 1. Further, the upper and lower disc blades 21 and 21 attached to the other ends 20b and 20b of the upper and lower feed cutting rollers 1 and 1, respectively, have their outer peripheral edge portions overlapping (or approaching) each other. The edge of the paper to be cut (for example, an envelope) is passed through the groove portion 22 of the casing 7, and the edge is cut by passing the paper between the disc blades 21 and 21 that rotate in the forward direction (opened). It is configured as follows.

Then, as shown in FIGS. 1, 4, and 5, when the switch 10 is pushed toward the side labeled “cutting”, the upper and lower feed cutting rollers 1 and 1 rotate forward (inward relative to each other). Rotate towards). When the paper P to be cut is inserted from the front insertion hole 13a, the paper P to be cut is pulled backward by the upper and lower feed cutting rollers 1 and 1, and adjacent to the upper and lower disc blade portions 3 and 3. A plurality of slender paper wastes 23 ... Cut at the outer peripheral corner portions 5 and 5 which are in contact with each other are fed into the storage cover 12.

At this time, since the outer peripheral corner portions 5 and 5 of the disc blade portion 3 are acute and the blade edge width W is 0.5 mm or less, the contact portion with the cut paper P is limited to the blade edge (FIG. As a result, the pressing force against the paper P to be cut is concentrated on the cutting edge, so that the cutting can be performed easily and smoothly, and the numerous small grooves 17 provided in the outer peripheral corner portion 5 ... Therefore, the cut paper P can be smoothly drawn in the rearward direction.

Next, FIG. 6 shows another embodiment of the shredder of the present invention, in which a shroud-shaped concave circumferential groove 4 is formed on the outer peripheral surface of the disc blade portion 3 of the feed cutting roller 1. And the outer peripheral corners 5 and 5 are made more acute.

FIG. 7 shows another embodiment in which a V-shaped concave peripheral groove 4 is formed on the outer peripheral surface of the disc blade portion 3 of the feed cutting roller 1 to form an outer peripheral angle. The parts 5 and 5 have an acute angle.

[0020]

【Example】

 Next, regarding the shredder of the present invention and the conventional product, the required cutting torque required for cutting various cut papers (postcards with postcards, postcards with postcards, coated paper postcards, envelopes 90mm width, envelopes 106mm width and envelopes 120mm width) Comparative tests were conducted and the results are shown in Table 1.

[0021]

[Table 1]

From the results, it is shown that the product of the present invention has a smaller required torque for cutting as compared with the conventional product, but particularly for three types of envelopes, the torque required for cutting is considerably smaller. It indicates that there is.

[0023]

[Effect of the invention]

 Since the present invention is configured as described above, the following effects can be obtained.

Since the outer peripheral corners 5 and 5 of the disc blade portion 3 of the feed cutting roller 1 (according to claim 1) play the role of sharp edges, comparison of official postcards, photo postcards, envelopes, etc. Even the to-be-cut paper P having a desired thickness can be cut easily and smoothly. In addition, the required cutting torque applied when cutting the paper P having such a thickness is reduced, and the motor M is not overloaded.

[0025] (According to the second aspect), the cutting can be performed more easily and smoothly. (According to claim 3) Since the large number of small grooves 17 provided in the outer peripheral corner portion 5 serve as a non-slip, the cut paper P can be smoothly (backwardly) fed in backward.

[Brief description of the drawings]

FIG. 1 is a structural explanatory view showing an embodiment of a shredder of the present invention.

FIG. 2 is a front view of essential parts showing upper and lower feed cutting rollers.

FIG. 3 is a side view of essential parts showing upper and lower feed cutting rollers.

FIG. 4 is a side view of an essential part showing a cut state of the paper to be cut.

FIG. 5 is a front view of an essential part showing a cut state of the paper to be cut.

FIG. 6 is an explanatory diagram showing another embodiment.

FIG. 7 is an explanatory diagram showing another embodiment.

FIG. 8 is a front view of a main part showing a conventional example.

[Explanation of symbols]

 1 Feed cutting roller 2 Shaft part 3 Disc blade part 4 Concave peripheral groove 5 Outer peripheral corner part 17 Small groove M Motor W width

Claims (3)

[Utility model registration claims] 1. A pair of feed cutting rollers 1, each of which has a motor M and a shaft portion 2 and a plurality of disc blade portions 3 provided on the shaft portion 2 at a predetermined pitch while rotating by the motor M.
In the shredder provided with 1, the shaft portion 2 and the disc blade portion 3 are integrally formed, and the disc blade portion 3
A shredder, characterized in that a concave circumferential groove 4 is formed on the outer circumferential surface of each of the concave circumferential grooves 4 and the outer circumferential corner portions 5 and 5 on both sides of the concave circumferential groove 4 are sharp edges. 2. The shredder according to claim 1, wherein the width W of the outer peripheral corner portion 5 is 0.5 mm or less. 3. A large number of small grooves 17 along the outer peripheral corners 5, 5.
The shredder according to claim 1, wherein the shredder is provided.