JP3963780B2 - Terminal network controller - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal network control device that is connected to a terminal device and performs data communication with a center side device using a telephone line.
[0002]
[Prior art]
FIG. 11 shows a communication system that performs data transmission by no-ringing between the center side and the terminal side using a communication line such as a telephone line. A center side device 1 having a host computer is connected to a terminal network control device 3 through a general public line network 2. For example, a meter such as a gas meter 5 of a gas cylinder 4, a contact device such as a gas leak sensor, and a telephone 6 are connected to the terminal network control device 3.
[0003]
Then, meter reading of the meter 5 is performed without ringing the telephone 6 from the center side device 1, or the abnormal signal detected by the data of the meter 5 or the sensor by the call from the terminal network control device 3 is transmitted to the center side device 1. In other words, two-way communication is performed.
[0004]
As shown in the exploded perspective view of FIG. 10, the terminal network control device 3 is a terminal block for connecting the meter 5 to a control board (not shown) provided with a communication circuit, a control circuit and the like necessary for communication. 30 is connected and accommodated in a bag-shaped outer case 20. A cover 70 for covering the terminal block 30 is detachably fitted to the outer case 20. The terminal block 30 is screwed to the outer case 20 on the wall surface together with the cover 70 by a fixing screw 50 at the mounting portion 22 provided in the outer case 20.
[0005]
[Problems to be solved by the invention]
In the terminal network control device shown in FIG. 10, when connecting and fixing wiring from the outside to the terminal block 30, it is necessary to remove the cover 70 from the outer case 20, which is not only cumbersome but also wiring at a high place. In some cases, the cover 70 was dropped during the connection fixing work.
[0006]
[Means for Solving the Problems]
Therefore, the present invention eliminates the cover 70 covering the terminal block 30 and connects the external case 20 to the terminal block 30 for the purpose of releasing the troublesome cover 70 attachment / detachment work when connecting and fixing wiring from the outside. I decided to double as a lid. A holding mechanism is provided between the outer case 20 and the terminal block 30, and the terminal block 30 is pulled out from the outer case 20 with one screw, and the terminal block 30 is held in the outer case 20 in that state.
[0007]
Specifically, the insertion holding portion 32 of the fixing screw 50 is provided on the terminal block 30 and the loosened fixing screw 50 is inserted into the insertion holding portion 32 so that the terminal block 30 is pulled out from the outer case 20. Hold.
[0008]
Alternatively, the lid 41 of the terminal block 30 is formed in a concave shape, a slit 42 is provided behind the recess 47, the terminal block 30 is pulled out from the outer case 20 using the slit 42 and the screw 55 as a guide, and the slit 42 At the upper end, the terminal block 30 is held by the screw 55 in a state of being pulled out from the outer case 20.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In these drawings, for convenience of explanation, the same parts and portions as those of the conventional terminal network control device 3 shown in FIGS. 10 and 11 are denoted by the same reference numerals.
[0010]
(First embodiment)
The terminal network control apparatus 3 of 1st Embodiment is demonstrated with reference to drawings. FIG. 1 is an external perspective view of a state in which the terminal block 30 is pulled out from the outer case 20 in order to connect and fix the wiring 80 from the outside to the terminal block 30, and FIG. 2 is a longitudinal sectional view taken along the center line thereof. As shown in FIGS. 1 and 2, the terminal network control device 3 connects a meter 5 (see FIG. 11) to one end of a control board 10 provided with a communication circuit, a control circuit and the like necessary for communication. Terminal block 30 is provided and stored in a bag-shaped outer case 20.
[0011]
In the center of the terminal block 30 in the width direction, a groove 33 extending vertically (up and down) serving as a guide for the fixing screw 50 is provided. At the upper end of the groove 33, there is an insertion holding portion 32 for the fixing screw 50. Further, a boss 34 is formed at the lower end of the groove 33. A nut 60 is attached to the inner surface of the boss 34.
[0012]
The insertion holding part 32 and the boss 34 are connected by a groove 33. Therefore, by sliding the terminal block 30 vertically with the fixing screw 50 loosened and slightly pulled out, the fixing screw 50 passes through the groove 33 from the insertion holding portion 32 to the boss 34 or from the boss 34 to the insertion holding portion. It can be led to 32.
[0013]
The terminal block 30 is a staircase whose top is vertically high at the left and right of the groove 33, and terminal holding portions 46 partitioned in a box shape are formed in a row on each floor. In this example, two terminal holding portions 46 are provided (two on the left and right), two on the lower floor and four on the higher floor. A terminal 48 is screwed to each terminal holding portion 46. The lower end of the terminal holding portion 46 is opened, and each of the bundled wires 80 is connected to the terminal 48 through the opening.
[0014]
As shown in FIGS. 1 and 2, in a state where the terminal block 30 is pulled out from the outer case 20, the terminal block 30 is held by inserting the fixing screw 50 into the insertion holding portion 32. The tip is supported by pedestals 23 provided on both sides of the inner surface of the case 20.
[0015]
When the terminal block 30 is stored in the exterior case 20, the terminal block 30 is pushed up in the direction of arrow A and is slid together with the control board 10. At this time, the fixing screw 50 is guided through the groove 33 to the boss 34 to which the nut 60 for fixing the outer case 20 is mounted. On the contrary, when the terminal block 30 is pulled out from the outer case 20, the fixing screw 50 is guided to the insertion holding portion 32 through the groove 33. In order to facilitate storing and pulling out the terminal block 30, a notch 35 is provided in one direction of the boss 34, and the screw tip of the fixing screw 50 is processed into a pointed end.
[0016]
Further, a protrusion 36 is provided at the upper end of the terminal block 30 in order to reduce the clearance with the inner surface of the outer case 20. Although the back surface 20b of the outer case 20 extends vertically, the front surface 20a is slightly inclined toward the back surface 20b. Therefore, the inside of the exterior case 20 is narrowed back and forth as it goes upward. When the terminal block 30 is pushed up and stored in the exterior case 20, as shown in FIG. 4, the protrusion 36 comes into close contact with the inner surface of the front surface 20 a of the exterior case 20, and rattling of the terminal block 30 is prevented. Instead of the protrusion 36, a rib extending in the width direction may be provided at that position.
[0017]
In this state, when the connection and fixing of the external wiring 80 to the terminal block 30 is completed, the terminal block 30 is accommodated in the outer case 20 and fixed by the fixing screw 50. FIG. 3 is an external perspective view showing the state, and FIG. 4 is a cross-sectional view thereof.
[0018]
The terminal block 30 is accommodated so as to cover the bottom surface of the outer case 20. The lid 31 is provided with a notch 37 for leading out the connected and fixed wiring 80. At this time, the front end of the control board 10 is held by being fitted into a groove of a rib 24 provided at the upper end inside the outer case 20.
[0019]
Furthermore, a pedestal 39 is formed at two locations on the rear side of the lid portion 31, and one protrusion 38 is provided on the back surface of the pedestal 39. As shown in FIG. 5, the protrusions 38 are respectively fitted into the two holes 25 provided at the lower end of the back surface 20 b of the outer case 20 until the outer case 20 and the terminal block 30 are fixed with the fixing screws 50. The terminal block 30 is temporarily held in this state. Further, ribs 40 are provided on the front surface of the base 39, and each of the ribs 40 is held with one hand when the terminal block 30 is stored or pulled out.
[0020]
The fixing screw 50 has a body portion 51 that is thinner than the outer diameter of the screw portion 52 and is not cut by a fixed length of screw. A circular counterbore 53 is dug in the front surface 20 a of the outer case 20 so that the thread of the fixing screw 50 attached does not protrude, and the outer case 20 penetrates through the center of the counterbore 53. A screw hole 54 is provided. The diameter of the screw hole 54 is selected to be approximately the same as the diameter of the body 51 of the fixing screw 50. Even if the fixing screw 50 is loosened, the body 51 does not come into contact with the inner surface of the screw hole 54 and fall off. ing.
[0021]
Further, the length of the body portion 51 is such that the screw portion 52 of the fixing screw 50 is detached from the nut 60 attached to the boss 34 of the terminal block 30 and the projection 38 provided on the pedestal 39 and the hole 25 of the outer case 20. Therefore, even if the terminal block 30 is lifted by the fitting amount (d), the screw portion 52 is set to a length that does not hit the terminal block 30.
[0022]
(Second Embodiment)
A terminal network control device 3 according to the second embodiment will be described with reference to the drawings. 6 is an external perspective view of the terminal block 30 housed in the case 20, and FIG. 7 is a longitudinal sectional view taken along the center line thereof.
[0023]
Similarly to the first embodiment, the terminal block 30 is attached to the case 20 by fitting the protrusion 38 on the back surface of the pedestal 39 provided on the lid 41 formed on the terminal block 30 and the hole 25 of the case 20. It is stored and temporarily held, and is further fastened together with the case 20 by the mounting screw 55 and is completely fixed to the wall surface. At this time, the tip of the control board 10 is held by the ribs 24 as in the first embodiment.
[0024]
In the terminal block 30, a lid 41 on the bottom surface of the outer case 20 is formed in a concave shape, and a slit 42 is vertically provided behind the divergent recess 47 in the center of the lid 41. A slit plate 49 is provided. The terminal block 30 is fastened together with the exterior case 20 to the wall surface by the slit plate 49.
[0025]
The slit 42 needs to have a length corresponding to the amount by which the terminal block 30 is pulled out in order to connect and fix the wiring from the outside. Therefore, when the terminal block 30 is stored, the recess 47 is hidden inside the outer case 20 and a part of the slit 42 is taken into the outer case 20.
[0026]
When connecting and fixing wiring from the outside to the terminal block 30, the mounting screw 55 is loosened by a certain amount, and the rib 40 is lifted to fit into the hole 25 (see FIG. 5) on the back surface 20 b of the outer case 20. The protrusion 38 (see FIG. 5) on the back surface of the pedestal 39 is removed, and the terminal block 30 is pulled out in the direction of arrow B. The fitting between the hole 25 of the outer case 20 and the protrusion 38 of the terminal block 30 not only temporarily holds the terminal block 30 in the accommodated state, but also causes the terminal block 30 to pop out when the mounting screw 55 is loosened. It is preventing.
[0027]
A counterbore 43 having a predetermined depth and length is vertically provided around the lower end of the slit 42. The depth of the counterbore 43 is set to be larger than the fitting amount (d) (see FIG. 5), and the length of the counterbore 43 is set until the protrusion 38 of the terminal block 30 is detached from the back surface 20b of the outer case 20. Length (L) (see FIG. 5). Therefore, the terminal block 30 can be easily pulled out by loosening the mounting screw 55 to the height around the spot facing 43.
[0028]
FIG. 8 is an external perspective view showing a state in which the terminal block 30 is pulled out from the outer case 20, and is a longitudinal sectional view taken along the center line of FIG. Using the mounting screw 55 and the slit 42 as a guide, the terminal block 30 is pulled out until the upper end of the slit 42 and the mounting screw 55 come into contact with each other, and the connection and fixing of the wiring 80 to the terminal 48 from the outside of the terminal block 30 becomes possible. . At this time, the tip of the control board 10 is supported by pedestals 23 provided on both sides of the inner surface of the case 20 as in the first embodiment.
[0029]
Further, a notch 37 for leading out the wiring 80 connected and fixed to the terminal block 30 is provided on the slope 44 that defines the width of the recess 47 that spreads out at the end of the lid portion 41. By leading the wiring 80 obliquely through the notches 37, water droplets are prevented from adhering to the terminals 48 even if rainwater or the like enters from the notches 37 by blowing up. Further, by providing a thin-sided rib 45 connected to the notch 37 in the horizontal direction on the inner surface of the inclined surface 44, the wiring 80 led out obliquely is restrained horizontally immediately before the notch 37, thereby further improving the effect. Is increasing.
[0030]
【The invention's effect】
As described above, according to the present invention, the terminal block can be pulled out from the outer case with one screw and held in that state, and wiring connection work from outside can be easily performed. At this time, since the screw is guided by a groove or slit provided in the terminal block, the terminal block can be pulled out reliably. Therefore, the cover covering the terminal block can be abolished, and it can be released from the troublesome work of attaching and detaching the cover.
[Brief description of the drawings]
FIG. 1 is an external perspective view showing a state in which a terminal block is pulled out from an exterior case in the terminal network control apparatus according to the first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view taken along the center line showing a state in which the terminal block is pulled out from the exterior case by the terminal network control device.
FIG. 3 is an external perspective view showing a state in which the terminal block is housed in an exterior case by the terminal network control device.
FIG. 4 is a longitudinal sectional view taken along the center line showing a state in which the terminal block is housed in an exterior case by the terminal network control device.
FIG. 5 is a partial cross-sectional view showing the fitting between the protrusion provided on the terminal block and the hole of the outer case.
FIG. 6 is an external perspective view showing a state in which a terminal block is housed in an exterior case in the terminal network control apparatus according to the second embodiment of the present invention.
FIG. 7 is a longitudinal sectional view taken along the center line showing a state in which the terminal block is housed in an exterior case by the terminal network control device.
FIG. 8 is an external perspective view showing a state in which the terminal block is pulled out from the exterior case by the terminal network control device.
FIG. 9 is a longitudinal sectional view taken along the center line showing a state in which the terminal block is pulled out from the exterior case by the terminal network control device.
FIG. 10 is an exploded perspective view showing a conventional terminal network control device.
FIG. 11 is a schematic configuration diagram of a communication system that performs data transmission by no-ringing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Control board 20 Exterior case 30 Terminal block 31 Cover part 33 Groove 41 Concave cover part 42 Slit 50 Fixing screw 55 Wall surface installation screw

Claims (7)

  A bag-shaped outer case that houses the control board, and a terminal block that is provided at one end of the control board and is connected and fixed to the outside, and also serves as a lid for the outer case, and is inserted into the outer case. In the terminal network control device for fixing the terminal block in a state of being housed in the outer case by tightening the fixed screw to the boss provided on the terminal block, the terminal block is pulled out from the outer case A terminal network control device, wherein the terminal block is provided with an insertion holding portion for holding the fixing screw. A groove connecting the boss and the insertion holding portion is provided on the terminal block, and when the terminal block is stored in the outer case or pulled out from the outer case, the fixing screw is passed from the boss through the groove to the boss. The terminal network control device according to claim 1 , wherein the terminal network control device is guided to the insertion holding unit or from the insertion holding unit to the boss.   A bag-shaped outer case that houses the control board, and a terminal block that is provided at one end of the control board and is connected and fixed from the outside, and also serves as a lid for the outer case, the terminal block and the In a terminal network control device for fixing the terminal block in a state of being housed in the outer case by tightening a screw inserted into the outer case to the wall surface, the terminal block is provided with a slit that serves as a guide for the screw. The terminal block is fixed at one end thereof, and the screw is guided to the other end of the slit and the terminal block is held by tightening the screw in order to connect and fix the wiring from the outside. A terminal network controller. The lid portion of the terminal block is formed with a recess that widens toward the terminal block, and a slit plate that forms the slit is provided on the wall surface side of the recess. Item 4. The terminal network control device according to Item 3 . Wherein at one end around a predetermined depth and length of the slit, the terminal network control apparatus according to claim 3 or 4, characterized in that a counterbore of the screw. A concave / convex fitting mechanism is provided between the terminal block and the outer case, and the terminal block is temporarily held in that state until the terminal block is fixed to the outer case. terminal network controller according to any one of claims 1 to 5. The terminal network control device according to any one of claims 1 to 6 , wherein a rib for gripping the terminal block when the terminal block is pulled out from the outer case is provided on the lid of the terminal block.

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