JPH0354863Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a staple cartridge for a stapler that stores a staple sheet formed by connecting a large number of straight unformed staple materials into a plate shape.

(Prior Art) A power-driven stapler has been devised to perform continuous binding work using staples, and the staples supplied to this type of stapler are unformed staples to improve storage efficiency in the cartridge. There are some in good condition. Staple cartridges for storing such unformed staple materials include those that store a large number of connected unformed staple materials wound into a coil shape, and those that store staple sheets that are connected like sheets and are stacked in multiple stages. There is something I did.

(Technical problem of the invention) Especially the staple sheet S of the latter form among the above forms
As shown in FIG. 2, the staple cartridge 1 storing the stapler cartridge 1 is a stapler in which the cartridge mounting portion 58 of the stapler 50 rotates around a rotating shaft 57 at the rear end of the stapler 50 to perform a binding operation. 50, the rear end of each staple sheet S comes into contact with the rear wall 3 of the staple cartridge 1 due to vibrations generated when the stapler 50 staples, as shown in FIG. Since the front ends of S are aligned in a straight line in an almost vertical direction, the lowermost staple sheet S1
The staple sheet S2 whose rear end S12 reaches near the staple supply opening 9 of the cartridge 1 and which is located above the staple sheet S2 is fed to the feeding device 5 of the stapler 50.
1, so that when the front end S21 of the staple sheet S2 moves toward the front wall 2 side of the cartridge 1, the front end S21 of the staple sheet S2 is supported by the lowermost staple sheet S1. The weight of the front end of each staple sheet S located above is added to the portion that is not supported by the endless belt 53, and the staple sheet S2 may be cut at this portion.

Front end S2 of cut staple sheet S2
The small pieces of No. 1 may remain in the cartridge 1 and block the opening 9, or may get between the stacked staple sheets S and prevent the staple sheets S from properly contacting the surface of the endless belt 53. When the staple is fed by the feeding device 51, it may become oblique with respect to the feeding direction during the feeding, resulting in a feeding failure, or there is a risk that the staple forming/driving device 52 may cause the staple to be formed incorrectly or the staple forming/driving device 52 may be damaged. It was hot.

(Means for Solving the Problem) In order to prevent the front end S21 of the staple sheet S2 located on the bottom staple sheet S1 from being cut by the weight of the staple sheets S3, S4, . . . The front wall 2 and the rear wall 3 face downward to the rear wall lower part 10 of the cartridge 1.
This is provided with an inclined surface 11 that gradually reduces the distance between the two.

(Function of the invention) The staple sheet S moves to the rear wall 3 of the cartridge 1 due to the vibration of the stapler 50, and the rear end comes into contact with the inclined surface 11 of the cartridge 1, so that each front end of the staple sheet S It slopes according to the following. In the section A of the staple sheet S2 whose front end S21 is placed on the rear end S12 of the staple sheet S1, there are staple sheets S3, S4, etc. located above the section A, which are located in the vertical direction of the section A. Although the weight of the staple sheet portion is added, the upper staple sheets S3, S4,...
The staple sheet portion located in the vertical direction of section A, where the leading end forms an inclined surface, is located on the cartridge rear wall 3.
compared to the case where there is no inclined surface 11, and therefore the weight applied to part A can be reduced accordingly.

(Effect of the invention) As mentioned above, by forming an inclined surface on the rear wall of the cartridge, it is possible to reduce the weight of the staple sheet located above that is applied to the staple sheet, thereby preventing the staple sheet from being cut, which can result in poor staple feeding due to this cutting. It is possible to avoid damage to the forming device when staples fed in an incorrect feeding state are formed, and to improve the reliability of the cartridge and the stapler to which this cartridge is attached.

(Example) The present invention will be explained based on FIG. Reference numeral 1 denotes a staple cartridge according to the present invention, in which a staple sheet S formed by connecting a plurality of straight unformed staple materials in a plate shape is placed in a frame consisting of a front wall 2, a rear wall 3, and side walls 4, 4. Holding portions 5, 5 which are stacked and stored in multiple stages and hold staple sheets S on the lower surface extend along the inside of the cartridge 1 at the lower ends 6, 6 of both side walls, and both the holding portions 5,
An opening 7 for receiving a staple feeding device 51 of a stapler 50, which will be described later, is provided between the openings 5 and 5.
The lower end 8 of the front wall of the cartridge 1 is provided with a staple supply opening 9 shown in FIG. A pair of inclined members 12, 12 (the other not shown) having inclined surfaces 11 that gradually reduce the distance between the two are provided. In the embodiment, a pair of inclined members 12, 12 are provided as the inclined surface 11 on the lower rear wall 10 of the cartridge 1, but the inclined surface 11 may extend over the entire length of the lower rear wall 10. Further, in front of the lower end 8 of the front wall, a guide member 13 for regulating the upper surface of the staple sheet S,
13 has been extended. Next, as shown in Figure 2,
The cartridge 1 is attached to the stapler 50 such that the endless belt 53 of the feeding device 51 of the stapler 50 is received in the opening 7. The stapler 50 is driven by a motor 54 and a transmission mechanism 55
The rotating member 56 to which the cartridge is mounted is rotated about the drive shaft 57 via the staple forming device 52, and one stapling process is completed by one reciprocating movement of the staple forming/driving device 52. FIG. 3 shows a stapler 50
A state in which the staples of the cartridge 1 mounted on the cartridge 1 are exhausted is shown. When the bottom staple sheet S1 is supplied to the staple forming/driving device 52 by the endless belt 53 and a portion of the rear end portion S12 remains in the cartridge 1,
The front end S21 of the staple sheet S2 located above is located on the rear end S12 of the staple sheet S1, and the rear end S22 is located on the endless belt 53. In the conventional cartridge 1 shown in FIG. 4 in a similar state, the staple sheets S3 and S which are higher than the staple sheet S2
The rear end surfaces of staple sheets 4, . Therefore, a load is applied to this portion A whose lower surface is not supported, and the staple sheet S2 is cut at this portion A. However, in the present invention, since the sloped surface 11 is provided on the lower part 10 of the rear wall, each front end surface of the staple sheet S that is in contact with the sloped surface 11 is in contact with the sloped surface 11. The staple sheet S2 is not cut at the A section since the staple sheet S2 has a sloped shape and the load applied to the A section of the front end S21 of the staple sheet S2 is reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a staple cartridge according to the present invention, FIG. 2 is an overall perspective view of a stapler using the cartridge according to the present invention, FIG. 3 is a sectional view of the main parts of the cartridge according to the present invention, and FIG. The figure is a sectional view of the main parts of a conventional cartridge. 1... Staple cartridge, 2... Front wall,
3... Rear wall, 8... Lower end of front wall, 9... Staple supply opening, 10... Lower part of rear wall, 11... Inclined surface, 12, 12... Inclined member, 13, 13... Guide member , 50... stapler, 51... staple feeding device, 53... endless belt, S... staple sheet.

Claims (1)

[Scope of utility model registration request] In a staple cartridge that stores staple sheets formed by connecting a plurality of straight unformed staple materials in a plate shape in a stacked manner, the lower end of the front wall is provided with an opening for supplying staples, and the lower surface is provided with a stapler for the cartridge. An opening is provided at the bottom of the rear wall so that the lowest staple sheet in the cartridge can come into contact with the staple feeding device of the stapler when the cartridge is attached to the cartridge, and an inclined surface is provided at the lower part of the rear wall to gradually reduce the distance between the front wall and the rear wall. A staple cartridge characterized by being provided with.