JP3912237B2 - Splitter laying apparatus and splitter apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a configuration of a splitter laying apparatus used for laying work for superimposing a signal from a high-speed communication line on a laid metal telephone wiring in an apartment house or the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, xDSL (Digital Subscriber Line) technology for performing so-called broadband communication using telephone conductors laid nationwide has been widely used. A typical example of such xDSL technology is ADSL (Asymmetric Digital Subscriber Line) technology, which promotes broadbandization for Internet communication in each home.
[0003]
However, the current mainstream ADSL service generally has a communication speed of 1.5 Mbit / sec, and only a communication service of 8 to 12 Mbit / sec is provided at most. However, for example, in a video on demand service (hereinafter referred to as “VOD”) or the like, it is required to realize a higher communication speed in order to realize high-quality image transmission in a more stable environment.
[0004]
As such an application, one option is to implement so-called FTTH (Fiber To The Home) communication by laying an optical fiber to each home.
[0005]
However, when receiving such an FTTH service, for example, in an apartment house such as a condominium, in order to install an optical fiber in each household, the permission of the apartment house owner is required. It may be difficult for each household to receive directly.
[0006]
On the other hand, in such apartment houses, telephone lines etc. have already been laid by high-speed lines such as optical fibers until the vicinity of the apartment house, and from the concentrator in the apartment house to each home, In many cases, a telephone line is laid by metal wiring (for example, copper wiring).
[0007]
Under these circumstances, if a higher communication speed can be realized through conventional metal wiring, video connection services such as Internet connection and VOD at a higher communication speed will be provided to such apartment houses. It becomes possible.
[0008]
As such a technique, for example, a “VDSL (Very High Bit Rate DSL)” technology meaning “very fast xDSL” is being developed.
[0009]
VDSL uses a frequency band up to 12 MHz corresponding to about 12 times that of ADSL. When used simultaneously with the telephone, the frequency band of 25 kHz or lower is not used in the same manner as ADSL. This is because the voice for telephone can be transmitted simultaneously, and it becomes possible to use the telephone and the VDSL service simultaneously with one copper wire.
[0010]
With such a configuration, the VDSL can realize a speed of 22 Mbit / sec for downlink and 3 Mbit / sec for uplink, and a communication speed of 13 Mbit / sec for the symmetric type. realizable.
[0011]
Although copper wire communication can be speeded up if a wide frequency band is used, there is a problem that transmission distance is sacrificed. This is because a higher frequency signal is attenuated as it travels through the copper wire. If the signal is attenuated by attenuation, the data cannot be confirmed on the receiving side due to the influence of noise coming from other lines or from the outside.
[0012]
However, as described above, if VDSL is used using metal wiring such as copper wire for relatively short-distance communication in an apartment house, such a trade-off between transmission speed and transmission distance is required. Can overcome the problem.
[0013]
However, in order to provide such a service to each household of the apartment house, it is necessary to reduce the construction cost of the line concentrator in the apartment house as described above, and it is desirable that the construction work can be easily performed.
[0014]
For example, as a first conventional example, a public telephone network connection apparatus including a splitter of an asymmetric digital subscriber line transmission system has the following configuration (for example, see Patent Document 1). That is, in the first conventional example, in a public telephone network connection device including a splitter of an asymmetric digital subscriber line transmission system, a telephone connection unit that connects a telephone terminal and a public telephone network and includes a splitter for the telephone terminal. And an asymmetric digital subscriber line transmission system comprising a splitter for connecting the subscriber side terminal of the asymmetric digital subscriber line transmission system to the public telephone network and comprising a splitter for the subscriber side terminal of the asymmetric digital subscriber line transmission system Is disclosed.
[0015]
On the other hand, as the second conventional example, there are the following inventions relating to the local wiring method and the local wiring apparatus (for example, see Patent Document 2). That is, in the second conventional example, the voice band signal among the multiplexed signals input from the station side passes through the low pass filter, passes through the voice band communication device, passes through the low pass filter, and passes through the high pass filter. A configuration is disclosed in which it is combined with the passed xDSL signal and output to a POTS (Plain Old Telephone Service) splitter.
[0016]
[Patent Document 1]
JP-A-11-205467
[0017]
[Patent Document 2]
JP 2000-316060 A
[0018]
[Problems to be solved by the invention]
However, the conventional technology as described above does not disclose what construction method is used for the installation of the splitter.
[0019]
For example, depending on the installation location of the splitter, it is necessary to cut and process an existing telephone line, and the voice call is interrupted during this time. In addition, there is a possibility that the telephone and the peripheral device may not operate due to a wrong office line at the time of cutting.
[0020]
This is due in part to the variety of telephone lines. On the terminal side, the RJ-11 connector is used to connect the splitter to the telephone device, the xDSL device, and the line to the central office. This is also caused by the necessity of attaching the RJ-11 connector by disconnecting the telephone line connected to.
[0021]
As the station-side connector, a Telco connector is generally used, but there is no specific form. However, when a splitter is inserted between a telephone exchange and a commercial telephone line, it is necessary to cut and connect the existing wiring. In particular, when the station side device is placed near the MDF (Main Distributing Frame) in the apartment house, it is necessary to cut and secure a jumper between the commercial telephone line and the appliance in the apartment building in the MDF.
[0022]
The present invention has been made to solve the above-mentioned problems, and its purpose is to easily lay construction for high-speed communication service using xDSL metal wiring in an apartment house or the like. It is an object of the present invention to provide a splitter installation device and a splitter device that can be performed.
[0023]
[Means for Solving the Problems]
In order to achieve the above object, according to one aspect of the present invention, there is provided a splitter laying device used for laying a splitter device, the base having first and second guide grooves parallel to each other on the upper surface, First and second crimp terminals provided at predetermined intervals so that at least a part of the first guide groove is exposed; the first and second crimp terminals; and a low-frequency signal input side of the splitter device; A first connection line, a third and a fourth crimp terminal provided at a predetermined interval so that at least a part thereof is exposed in the second guide groove, and a third and a fourth crimp terminal. Between the second connection line and the first and third crimp terminals for connecting the low frequency signal output side and the high frequency signal output side of the splitter device, and the second and fourth Cutting provided on the upper surface between the crimp terminals Applying pressure between the blade, the first, second, third and fourth crimp terminals and the cutting blade, and the wiring in the first and second guide grooves, covering the base. And a possible lid.
[0024]
Preferably, the cutting blade includes first and second cutting blades provided at a predetermined interval.
[0025]
Preferably, pressure application assisting means for assisting application of pressure between the first, second, third and fourth crimp terminals and the cutting blade and the wiring in the first and second guide grooves. Is further provided.
[0026]
Preferably, the pressure application assisting means is a base portion having holes that open from the bottom surface of the base portion to the lower portions of the first, second, third, and fourth crimp terminals and the lower portion of the cutting blade. The splitter installation apparatus as described.
[0027]
According to another aspect of the present invention, there is provided a splitter device, a signal separating means for separating a high frequency signal and a low frequency signal, a base portion having first and second guide grooves parallel to each other on the upper surface, The first and second crimp terminals provided at predetermined intervals so that at least a part of the guide groove is exposed, and the low frequency signal input side of the first and second crimp terminals and the signal separating means A first connection line, third and fourth crimp terminals provided at a predetermined interval so that at least a part of the second connection groove is exposed, and third and fourth crimp terminals. Between the second connection line and the first and third crimp terminals for connecting the terminal and the output side of the low frequency signal and the output side of the high frequency signal of the signal separating means, and the second and second A cutting blade provided on the upper surface between the four crimp terminals, and a base A lid that is covered and capable of applying pressure between the first, second, third, and fourth crimping terminals and the cutting blade and the wiring in the first and second guide grooves; Is provided.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the same components are denoted by the same reference numerals, and their names and functions are also the same. Therefore, detailed description thereof will not be repeated.
[0029]
FIG. 1 is a conceptual diagram for explaining a communication line laying form in an apartment house where wiring work is performed by a splitter laying apparatus according to the present invention.
[0030]
It is assumed that the telephone line 20 is laid from the telephone station 10 by, for example, copper wiring or optical fiber via the utility poles 12.1 to 12.2.
[0031]
In the following description, it is assumed that the communication line 30 for connection to a public network, for example, the Internet, is also laid to the apartment house via the utility poles 12.1 to 12.2. This communication line 30 is also assumed to be an optical fiber.
[0032]
The telephone line 20 and the communication line 30 laid in this way are used as metal wiring for transmitting a telephone voice signal to each home in the wiring distribution device 110 (hereinafter referred to as MDF) in the apartment house 100. Branch. Further, the metal wiring is connected to each of the doors 120.1 to 126. through the IDF provided for each floor. n.
[0033]
In providing the above-mentioned xDSL service to each house, the DSLAM for distributing the connection to the Internet or the like to each house via the communication line 30 for connecting to the Internet in the MDF. (Digital Subscriber Line Access Multiplexer) and the like are provided.
[0034]
FIG. 2 is a conceptual diagram for explaining, for example, the configuration of door 120.1 out of the configuration of MDF 110 and each door in the configuration shown in FIG.
[0035]
Referring to FIG. 2, in MDF 110, telephone network 22 including telephone station 10 and doors 120.1 to 126. n, and a POTS splitter 112 for separating a low-frequency signal for exchanging audio signals and a high-frequency signal for performing high-speed digital communication over the Internet, the Internet network 32 and the POTS splitter 112 DSLAM 114 for controlling communication with each door and the POTS splitter 112 from each of the doors 120.1 to 126. and a wiring board 116 for connecting to the metal wiring 130 between n.
[0036]
Accordingly, the POTS splitter 112 connects the doors 120.1 to 126. Until n, the existing metal wiring 130 for telephone communication is shared for low frequency signal such as voice and high frequency signal transmission such as xDSL.
[0037]
Each door 120.1-126. n receives a signal transmitted by the metal wiring 130, receives a low-frequency audio signal and a high-frequency signal for xDSL service, and receives a low-frequency signal from the POTS splitter 122. An xDSL modem 128 is provided for controlling communication between a telephone terminal 124 that performs telephone communication and a signal from the POTS splitter 122 and a communication terminal in each door, for example, a personal computer 126.
[0038]
In the following description, it is assumed that xDSL is VDSL in particular.
[0039]
FIG. 3 is a conceptual diagram for explaining the configuration of wiring board 116 shown in FIG. The wiring board 116 is usually made of a metal such as iron, and a plurality of terminal boards 1170 are provided in a housing 1164 having a door 1162 that can be opened and closed.
[0040]
Each terminal board 1170 is connected to a telephone line from the office side, and is connected to a telephone line 130 to each door (each household). For the VDSL service, either between the terminal board 1170 and the telephone line (pair line) from the office side, or between the terminal board 1170 and the telephone line (pair line) to each home, It is necessary to perform work for installing the station side POTS splitter 112. In the configuration shown in FIG. 2, the station side POTS splitter 112 is installed between the terminal board 1170 and the telephone line (pair line) 20 from the station side.
[0041]
FIG. 4 is an enlarged view showing the configuration of the terminal board 1170 shown in FIG.
The terminal board 1170 is provided with a plurality of station-side connectors 1172 and home-side connectors 1174, and a test connector 1176 is provided between each station-side connector 1172 and the home-side connector 1174. Yes. A pair wire from the telephone office is connected to the pair of the office side connectors 1172, and the pair wire to each home is connected to the pair of the home side connectors 1174 via the test connector 1176. When a communication line test or the like is performed, a signal is taken out via the test connector 1176.
[0042]
FIG. 5 is a conceptual diagram for explaining one form for installing the station side POTS splitter 112 on such a terminal board 1170.
[0043]
As described above, the station-side POTS splitter 112 is provided with a low-pass filter LPF for passing a low-frequency band telephone line signal and a high-pass filter HPF for passing a high-frequency signal such as xDSL.
[0044]
The telephone line 20 from the station side is connected to a pair of station side connectors 1172 of the terminal board 1170 via a low pass filter LPF.
[0045]
On the other hand, the wiring 30 for the xDSL service is connected from the DSLAM 114 via the high pass filter HPF to the station side connector 1172 on the same terminal board 1170 to which the low pass filter LPF is connected.
[0046]
By adopting such a configuration, the telephone line 130 from the terminal board 1170 to each home is shared for telephone communication and VDSL service communication.
[0047]
However, in order to lay the station-side POTS splitter 112 in this way, it is necessary to cut the telephone line from the station side and perform wiring work at two locations as shown in FIG.
[0048]
In this case, as described above, since it is necessary to cut and process such two places, not only the period during which the voice call is interrupted is prolonged, but if the connection is made with the wrong polarity, telephone or Internet communication, etc. There is a problem that the terminal device for the operation stops.
[0049]
FIG. 6 is a conceptual diagram for explaining another configuration for laying POTS splitter 112 on terminal board 1170 shown in FIG.
[0050]
In the configuration shown in FIG. 6, a station-side POTS splitter 112 is provided for a pair of telephone lines from the terminal board 1170 to each home.
[0051]
In this case, the signal from the pair of the home side connector 1174 of the terminal board 1170 is connected to the pair wire 130 to each home via the low pass filter LPF in the station side POTS splitter 112 and the wiring from the DSLAM 114 is The high-pass filter HPF is connected to a pair wire 130 to each home.
[0052]
However, even when the configuration described in FIG. 6 is adopted, as shown in FIG. 6, it is necessary to perform wiring work at two places after the paired wire on the home side is cut.
[0053]
Therefore, the same problem as described with reference to FIG. 5 may occur.
FIG. 7 is a conceptual diagram showing a configuration when construction for realizing the same connection as that in FIG. 5 or 6 is performed using the splitter laying apparatus 2000 of the present invention.
[0054]
As illustrated in FIG. 7, in the present invention, a splitter laying apparatus 2000 having terminals having a crimping function is provided for laying the station-side POTS splitter 112.
[0055]
The splitter laying device 2000 includes crimp terminals 2100 and 2102 connected to the connection pair wire 2010 drawn from the input side of the low pass filter of the station side POTS splitter 112, the output side of the low pass filter LPF of the station side POTS splitter 112, and A node on the output side of the high-pass filter HPF and crimp terminals 2104 and 2106 to be connected are provided, respectively.
[0056]
That is, the splitter installation apparatus 2000 is connected in advance to the station side POTS splitter 112 by the connection line 2010 and the connection line 2020 before the station side POTS splitter 112 is installed. It shall be.
[0057]
The wiring from the DSLAM 114 is input to the high pass filter HPF in the station side POTS splitter 112.
[0058]
Here, when the POTS splitter 112 is laid on the terminal board 1170, for example, the same configuration as described in FIG. 5, that is, the station side POTS on the station side pair line side of the terminal board 1170 is used. A case where the splitter 112 is laid will be described.
[0059]
At this time, when connecting the telephone line (pair line) on the station side to the splitter laying apparatus 2000, one of the pair lines is crimped and connected to the crimp terminals 2100 and 2104, and the other of the pair lines is Connected to the crimp terminals 2102 and 2106. In addition, as will be described later, when the pair line is cut at the dotted line shown in FIG. 7 on the splitter laying apparatus 2000, the connection as shown in FIG. 5 is automatically performed. The same wiring work will be carried out.
[0060]
In addition, in this case, how the station side POTS splitter and each wire of the pair line are connected is determined by connecting the connection side line 2010 between the station side POTS splitter 112 and the splitter installation device 2000 in advance. Since it is determined at the stage of connection by 2020, the possibility that construction is performed with the wrong polarity is extremely reduced.
[0061]
Moreover, since the electrical connection through the low-pass filter LPF has already been formed at the point of time when the pair line on the station side is disconnected during the laying work, the disconnection time of the telephone line accompanying the work is virtually reduced. It can be set to zero.
[0062]
FIG. 8 is a diagram for explaining the configuration when the splitter laying apparatus 2000 as shown in FIG. 7 and the station side POTS splitter 112 are constructed on the wiring board 116 as shown in FIG. is there.
[0063]
In FIG. 8, unlike the case described with reference to FIG. 7, a configuration in which the station-side POTS splitter 112 is arranged with respect to a home-side pair line is described.
[0064]
That is, the wires constituting the home-side paired wires from the terminal board 1170 are crimped to the crimping terminals 2100 and 2104 and the crimping terminals 2102 and 2106 of the splitter laying apparatus 2000, respectively. Then, the paired wires are cut between the crimp terminals 2100 and 2104 and between the crimp terminals 2102 and 2106.
[0065]
As shown in FIG. 8, it is possible to realize wiring for performing an xDSL service such as VDSL with a minimum of construction for the existing wiring board 116.
[0066]
FIG. 9 is a perspective view for explaining the configuration of the splitter laying apparatus 2000 in more detail.
[0067]
Splitter laying apparatus 2000 includes a base 2200 and a lid 2400.
The base portion 2200 is provided with guide grooves 2202 and 2204 for guiding telephone lines (pair wires) in parallel with each other along the direction of one side of the upper surface having a rectangular shape, and the crimp terminal 2100 is provided in the guide groove 2202. The heads of the crimp terminals 2102 and 2106 are exposed in the guide groove 2204. Further, cutting blades 2206 and 2208 for cutting a telephone line intersect the guide grooves 2202 and 2204 between the crimp terminal 2100 and the crimp terminal 2102 side and the crimp terminal 2104 and the crimp terminal 2106 side. It is provided as follows.
[0068]
One wiring of a connection line 2010 is connected to the crimp terminal 2100 via a connection hole 2210 opened from the side surface of the base 2200, and the crimp terminal 2102 is connected via a connection hole 2212 opened from the side surface of the base 2200. The other wiring of the connection line 2010 is connected.
[0069]
Similarly, one wiring of the connection line 2020 is connected to the crimp terminal 2104 via a connection hole 2214 opened from the other side surface of the base portion 2200, and the crimp terminal 2106 is opened from the other side surface of the base portion 2200. The other wiring of the connection line 2020 is connected through the connection hole 2216.
[0070]
Furthermore, guide grooves 2402 and 2404 are provided on the surface (bottom surface) of the lid portion 2400 that is mated with the base portion 2200 so as to coincide with the guide grooves 2202 and 2204 and also coincide with the cutting blades 2206 and 2208. Thus, grooves 2406 and 2408 are provided.
[0071]
In the configuration as described above, when the telephone line (pair line) is placed on the guide grooves 2202 and 2204 of the base 2200 and the cover 2400 is put on the base 2200 and pressure is applied, the telephone line (pair line) The connection lines 2010 and 2020 are crimped and connected as shown in FIG. 7, and the telephone lines are cut by the cutting blades 2206 and 2208.
[0072]
FIG. 10 is a perspective view showing a configuration of a modified example of splitter installation apparatus 2000 shown in FIG.
[0073]
In the case of only the configuration as shown in FIG. 9, when it is difficult to apply pressure sufficient to crimp and cut the telephone line, as shown in FIG. 10, the crimp terminals 2100 and 2102 from the bottom side of the base 2200. Holes 2300, 2302, 2304, and 2306 that open to the bottom of 2104 and 2106 are provided, and holes 2316 and 2318 that open from the bottom side of the base 2200 to the bottom of the cutting blades 2206 and 2208, respectively.
[0074]
FIG. 11 is a diagram showing the bottom surface of the base 2200 shown in FIG.
By making holes as shown in FIGS. 10 and 11 in the bottom surface of the base 2200, it is possible to efficiently apply a large pressure to the crimp terminals 2100 to 2106 and the cutting blades 2206 and 2208 with a crimping tool. It becomes.
[0075]
At this time, it is assumed that the connection holes 2210 to 2216 have enough play to move up and down while the connection lines 2010 and 2020 and the crimp terminals 2100 to 2106 remain connected.
[0076]
In order to apply pressure to the crimp terminals 2100, 2102, 2104 and 2106 and the cutting blades 2206 and 2208, for example, a handle is attached to the side surface of the base 2200, and the crimp terminals 2100 to 2106 and the cutting are gradually performed by turning the handle. A mechanism for raising the blades 2206 and 2208 may be provided.
[0077]
With such a configuration, it is possible to easily construct a splitter for high-speed communication service using xDSL metal wiring.
[0078]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
[0079]
【The invention's effect】
As described above, according to the present invention, it is possible to easily and accurately perform the installation work of the splitter for the high-speed communication service using the xDSL metal wiring. In other words, the possibility of construction work with the wrong polarity is reduced, and at the point of time when the metal wiring on the station side is cut during laying construction, the electrical connection has already been formed. The disconnection time of the telephone line can be practically almost zero.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram for explaining a communication line laying form in an apartment house where wiring work is performed by a splitter laying apparatus according to the present invention.
2 is a conceptual diagram for explaining, for example, a configuration of a door 120.1 among the configuration of an MDF 110 and each door in the configuration shown in FIG. 1;
3 is a conceptual diagram for explaining a configuration of a wiring board 116 shown in FIG. 2. FIG.
4 is an enlarged view showing a configuration of a terminal board 1170 shown in FIG. 3. FIG.
FIG. 5 is a conceptual diagram for explaining one form for installing the station side POTS splitter 112 on the terminal board 1170;
FIG. 6 is a conceptual diagram for explaining another form for installing the station side POTS splitter 112 on the terminal board 1170.
FIG. 7 is a conceptual diagram showing a configuration when construction for realizing the same connection as in FIG. 5 or FIG. 6 is performed using the splitter laying apparatus 2000 of the present invention.
FIG. 8 is a diagram for explaining a configuration in the case where a splitter laying apparatus 2000 and a station-side POTS splitter 112 are constructed on a wiring board 116;
FIG. 9 is a perspective view for explaining the configuration of the splitter laying apparatus 2000 in more detail.
10 is a perspective view showing a configuration of a modified example of the splitter laying apparatus 2000 shown in FIG. 9. FIG.
11 is a view showing a bottom surface of the base 2200 shown in FIG.
[Explanation of symbols]
10 telephone stations, 12.1 to 12.2 telephone poles, 20 telephone lines, 100 apartment houses, 110 MDF, 120.1 to 126. n Each door, 22 Telephone network, 32 Internet network, 112 Station side POTS splitter, 116 Distribution board, 114 DSLAM, 130 Metal wiring, 122 Home side POTS splitter, 124 Telephone terminal, 126 Personal computer, 128 Modem, 2000 splitter Device, 2010, 2020 connection pair wire, 2100-2104 crimp terminal, 2206, 2208 cutting blade.

Claims (5)

A splitter laying device used for laying a splitter device,
A base having first and second guide grooves parallel to each other on the upper surface;
First and second crimp terminals provided at predetermined intervals so that at least a part of the first guide groove is exposed;
A first connection line for connecting the first and second crimp terminals and the low-frequency signal input side of the splitter device;
Third and fourth crimp terminals provided at a predetermined interval so that at least a part of the second guide groove is exposed;
A second connection line for connecting the third and fourth crimp terminals to the output side of the low frequency signal and the output side of the high frequency signal of the splitter device;
A cutting blade provided on the upper surface between the first and third crimp terminals and between the second and fourth crimp terminals;
Applying pressure between the first, second, third, and fourth crimping terminals and the cutting blade and the wiring in the first and second guide grooves, covering the base. And a lid laying device. The splitter laying apparatus according to claim 1, wherein the cutting blade includes first and second cutting blades provided at a predetermined interval. Pressure application assisting means for assisting application of pressure between the first, second, third and fourth crimping terminals and the cutting blade and the wiring in the first and second guide grooves. The splitter installation apparatus according to claim 1, further comprising: The pressure application assisting means is the base having holes that open from the bottom surface of the base to the lower portions of the first, second, third and fourth crimp terminals and the lower portion of the cutting blade, respectively. Item 4. The apparatus for laying a splitter according to Item 3. A signal separating means for separating the high frequency signal and the low frequency signal;
A base having first and second guide grooves parallel to each other on the upper surface;
First and second crimp terminals provided at predetermined intervals so that at least a part of the first guide groove is exposed;
A first connecting line for connecting the first and second crimp terminals and the low frequency signal input side of the signal separating means;
Third and fourth crimp terminals provided at a predetermined interval so that at least a part of the second guide groove is exposed;
A second connection line for connecting the third and fourth crimp terminals to the output side of the low frequency signal and the output side of the high frequency signal of the signal separating means;
A cutting blade provided on the upper surface between the first and third crimp terminals and between the second and fourth crimp terminals;
Applying pressure between the first, second, third, and fourth crimping terminals and the cutting blade and the wiring in the first and second guide grooves, covering the base. A splitter device comprising a lid that can be used.

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