JPS6114469Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electric opening device equipped with a cutter for opening an object to be cut such as an envelope. The purpose is to improve the sharpness of the blade.

The basic structure of the present invention to achieve the above object is that a synthetic resin chassis is provided with bearing holding parts that hold the bearings of a pair of upper and lower cutters, and the shaft of the lower cutter is such that the lower cutter is the upper cutter. The upper cutter is biased in the direction of constant contact with the cutter, and the bearing holding portion of the upper cutter is formed at an inclination angle of 0.5° to 3° with respect to the bearing holding portion of the lower cutter.

With the above structure of the present invention, the upper cutter comes into contact with the lower cutter in an inclined state, so when cutting an object such as an envelope with the upper and lower cutters, the sharpness is very good. This can be obtained at a low cost since it requires only slight changes to the synthetic resin chassis.

An embodiment of the present invention will be described below with reference to the accompanying drawings. Fig. 1 shows a perspective view of the electric unsealing device, and 1 is the electric unsealing device main body. The main body cover 1b is detachably attached above the case 1a. Reference numeral 3 denotes a table detachably attached to the main body case 1a, on which an object 4 to be cut, such as an envelope, is placed, and a guide portion 3a for guiding the insertion of the object 4 to be cut is approximately provided at the rear of the table 3. It is integrally bent at right angles. 5 is the upper cutter, 6
is the lower cutter, and 7 is the switch lever.

FIG. 2 shows a cross-sectional view of the electric unsealer. Reference numeral 8 denotes a synthetic resin chassis mounted between the main body case 1a and the main body cover 1b. The boss portions 9 are integrally formed. Reference numeral 10 denotes an electric motor attached to and supported by the plurality of bosses 9 with screws 11; 12, 13, 14, 15 transmission gears; 16,
17 is a gear 12, 13, which transmits the power of the electric motor 10 to the upper cutter 5 and the lower cutter 6, respectively.
These are the upper cutter shaft and the lower cutter shaft which are transmitted via 14 and 15. Further, the chassis 8 includes:
As shown in FIGS. 3 and 4, a switch 18 operated by a switch lever is fixed and electrically connected to the electric motor 10. 19 is the main body case 1a and the main body cover 1
This opening 19 is an opening provided between
is provided so that the object 4 to be cut, such as an envelope, passes smoothly over the table 3.

Reference numerals 20 and 21 denote an upper cutter bearing and a lower cutter bearing that respectively hold the upper cutter shaft 16 and the lower cutter shaft 17, and these are connected to the bearing holding portion 22 of the upper cutter 5 integrally formed with the chassis 8 made of synthetic resin. They are press-fitted and fixed to the bearing holding portions 23 of the lower cutter 6, respectively. Further, the upper cutter shaft 16 passes through an upper cutter bearing 20, and a transmission gear 15 is fixed to the upper cutter shaft 16, and a retaining member 24 is fitted therein. The lower cutter shaft 17 also passes through the lower cutter bearing 21, and the lower cutter shaft 17 passes through the lower cutter bearing 21.
Transmission gears 13 and 14 are fixed to 7. 2
A coil spring 5 biases the lower cutter shaft 17 in a direction in which the lower cutter 6 is always in contact with the upper cutter 5, and this coil spring 25 is held by a support plate 26. The support plate 26 is screwed to a plurality of bosses formed integrally with the chassis 8.

In the above configuration, when opening an object to be cut such as an envelope, as shown in FIG. move it to Due to this movement, the end face of the object to be cut 4 pushes the switch lever 7, actuating the switch 18, and energizing the electric motor 10. This electric motor 10 has transmission gears 12, 13, 1
The upper cutter 5 and the lower cutter 6 are rotated via the switch lever 7 and cut the object 4 such as an envelope that has passed through the switch lever 7 to open it. At the same time, transport is carried out.

In the above operation process, as shown in FIG. center 16a of
has an inclination of 0.5° to 3° with respect to the center 17a of the lower cutter shaft 17, and in order to provide this inclination, the bearing holding portion 2 of the upper cutter shaft 16
2, a hole 22a into which the bearing 20 of the upper cutter shaft 16 is press-fitted and fixed is formed in an oblique direction.
With this configuration, the contact point between the upper cutter 5 and the lower cutter 6 is in the direction of arrow A where the object 4 such as an envelope is inserted, as shown in FIG. The workpiece 4 can be cut with good sharpness by the cutting tools 5 and 6.

As described above, in the electric opening device of the present invention, bearing holding parts for holding the bearings of a pair of upper and lower cutters are formed on the synthetic resin chassis, and the shaft of the lower cutter is in constant contact with the upper cutter. The bearing holding portion of the upper cutter is biased at an angle of 0.5° to the bearing holding portion of the lower cutter.
Since the upper cutter is formed with an inclination angle of 3°, the upper cutter comes into contact with the lower cutter 6 in an inclined state, and as a result, when cutting an object such as an envelope with the upper and lower cutters. , it is possible to obtain a very good sharpness, and since the means for achieving this is only a slight modification of the synthetic resin chassis, it can be obtained at a low cost.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an electric opening device showing an embodiment of the present invention, FIG. 2 is a side sectional view of the electric opening device, and FIG.
4 is a partially cutaway top view of the electric unsealing device, and FIG. 5 is a cross-sectional view taken along line A-A' in FIG. 3. 4...Object to be cut such as an envelope, 5...Upper cutter,
6...Lower cutter, 7...Switch lever, 8...
... Chassis, 10 ... Electric motor, 12, 13, 1
4, 15...Transmission gear (gear mechanism), 18...Switch, 20...Upper cutter bearing, 21...Lower cutter bearing, 22...Upper cutter bearing holding part,
23...Bearing holding part of lower cutter.

Claims (1)

[Scope of utility model registration request] A pair of upper and lower cutters for opening an object to be cut such as an envelope, a switch lever that is operated by inserting the object to be cut, a switch that is electrically opened and closed by the operation of the switch lever, and a switch that is electrically opened and closed by the operation of the switch lever. A chassis made of synthetic resin is provided with an electric motor operated by electricity and a gear mechanism for transmitting the power of the electric motor to the pair of upper and lower cutters, and the chassis holds bearings for the pair of upper and lower cutters. forming a bearing holding part,
The shaft of the lower cutter is biased in a direction in which the lower cutter is always in contact with the upper cutter, and the bearing holding portion of the upper cutter is inclined at an angle of 0.5° to 3° with respect to the bearing holding portion of the lower cutter. Formed electric unsealer.