JP3921164B2 - Communication line laying aid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a communication line laying aid that holds a communication line laid on a target surface along the target surface.
[0002]
The “communication line” referred to in the present invention means an electrical or optical line that realizes wired communication, such as a metallic fiber or an optical fiber. Actually, this communication line is not laid directly, but the communication line may be inserted through a protective tube called a “through tube”. In the present invention, the communication line is included in the sense of including the above-mentioned communication tube. Represent with words. And the communication network by the communication line laid by the communication line laying auxiliary tool of this invention is called a "communication line".
[0003]
[Prior art]
In order to construct a communication line, when laying a communication line along a target surface that is a pipe inner surface of a sewer pipe, a collecting rod or a mounting pipe, it is necessary to fix the position of the communication line along the communication line. For example, in order to lay a communication line in a sewer pipe, a communication line laying auxiliary tool for holding the communication line is attached in the sewer pipe. There are various types of communication line laying aids, and some of the newly installed sewage pipes have a communication line laying aid attached in advance to the sewage pipe itself, or a communication line laying aid is integrally formed. However, it is preferable that a communication line laying auxiliary tool can be attached to such an existing sewer pipe at the present when a sewer pipe having a very long total extension already exists. As the communication line laying aid, for example, Patent Literature 1 can be cited.
[0004]
This patent document 1 is a fixture (communication line laying aid) that is fixed in pressure contact with the substantially upper half circumference of the inner surface of the sewer pipe, and is the center of a substantially semi-annular spring plate that is slightly longer than the upper half circumference of the inner surface of the sewer pipe In addition, a concave curved portion for supporting an optical fiber cable (communication line) is formed, and the curved plate portions on both sides of the concave curved portion are expanded to both outer sides so that the distance between the lower ends is larger than the inner diameter of the tube. In addition to being open, the radius of curvature of the curved plate portion is substantially set to ½ of the inner diameter of the tube. In addition, in order to ensure the mounting stability as a communication line laying auxiliary tool, a stable wing piece protrudes forward and backward from the curved plate portion, or a sharp projection that bites into the inner surface of the sewer pipe on the outer surface of the curved plate portion. Forming.
[0005]
[Patent Document 1]
Japanese Unexamined Patent Publication No. 2000-104325 (2-3 pages, FIGS. 1-5)
[0006]
[Problems to be solved by the invention]
In Patent Document 1, the curved plate portion along the inner surface of the sewer pipe is pressed to fix the position of the communication line laying auxiliary tool relative to the sewer pipe. The curved plate portion is in close contact with the inner surface of the sewer pipe, and each curved plate portion is formed with an inclined surface at the side edge to reduce the resistance to water flow. It is stated that it is preferable to bond the curved plate portion to the inner surface of the sewer pipe.
[0007]
In addition, as a means for improving the stability of the communication line laying assisting tool, a stabilizing blade piece is projected from the curved plate part in the front-rear direction (extending orthogonal direction of the curved plate part) to prevent the communication line laying assisting tool from tilting. Yes. This stable wing piece is still insufficiently fixed only by pressure contact with the inner surface of the sewer pipe by the curved plate portion, suggesting the possibility that the communication line laying aid may move. This means that the communication line laying auxiliary tool presented in Patent Document 1 is to fix the position of the communication line with respect to the inner surface of the sewer pipe, and the position of the communication line laying auxiliary tool itself is insufficiently fixed. To do. However, this makes the position of the communication line itself uncertain.
[0008]
Furthermore, the communication line laying auxiliary tool shown in Patent Document 1 only considers the laying of the communication line extending in the horizontal direction, for example, in a target surface that is vertical or inclined like an inner surface of a collecting rod or an attachment pipe, There is a problem that communication lines cannot be laid stably. In this regard, a protrusion that bites into the inner surface of the sewer pipe is provided on the outer surface of the curved plate to prevent parallel movement of the communication line laying aid, but this is effective when the installation state is horizontal, but the communication line laying aid Is not very effective when mounted vertically.
[0009]
In addition, as a general rule, communication line laying aids need to be able to support the communication line stably to the extent that a permanent communication line can be constructed. In order to reduce this, it is preferable that the mounting operation is simple and easy. In this regard, the above prior art has an advantage in an easy mounting method in which installation is completed by bringing the pair of curved plate portions into the sewer pipe in a state of being narrowed by applying loads from both outer sides and removing the load. Therefore, in order to develop a communication line laying auxiliary tool that can secure the stability of position fixing while using an easy mounting method equivalent to the above-described prior art, it has been studied.
[0010]
[Means for Solving the Problems]
The product developed as a result of the study consists of a long leaf spring-like elastic body with both ends as locking portions, and a communication line insertion tube fixed to this elastic body. by laying a road inner surface as the target surface, in the communication line laying aid for holding the communication line is inserted into the communication line through tube along the object surface, the elastic body contact arc in the unloaded initial state radius greater than the target surface radius Atei locking portions at both ends in the state that caused the restoring force by bending in a direction to shorten the straight line distance between the engagement portion to each object plane, by the restoring force the elastic by pushing barbs Succoth in pressure contact with the target surface of the engaging portion of the main body, a communication line laying aid for position holding the target surface the lever of the elastic body by phagocytic write power of the engaging portion with respect to the target surface.
[0011]
Communication lines laying aid of the present invention, as easy installation method, and be pierced by pressing the locking portion of the elastic body at both ends to exert food write force against the target surface, the communication line by the pre-Symbol diet write power Improves the positional stability of the laying aid itself .
[0012]
From now on, the locking part must abut the target surface reliably, that is, the locking part must reach the target surface before the bent elastic body is completely restored . For example if the curved object surface (pipe inner surface, etc.), in the unloaded initial state, contact arc radius along the elastic body (linear elastic body infinite radius) must be larger than the target surface radius.
[0013]
Specific examples of the engaging portion include nails provided at both ends of the elastic body, or needles provided at both ends of the elastic body. Here, the nail or the needle is pierced with a sharp point, and a relatively thick base is distinguished from a nail, and conversely a thin base is distinguished from a needle. The claw may be formed integrally with the elastic main body by cutting the end of the elastic main body, or the claw formed separately may be fixed to both ends of the elastic main body. The needle is usually formed separately and is fixed to both ends of the elastic body. Preferably, the needle is fixed to protrude from both ends of the elastic body. Since it is assumed that the nail or the needle sticks to the target surface, when the target surface is a metal surface or a concrete surface, the nail or the needle is attached by a frictional force against the metal surface or the concrete surface.
[0014]
The locking portion made of the claw or the needle is stabbed into contact with the target surface by the restoring force of the elastic body, but the vector of the restoring force is not the extending direction of the elastic body. It faces on a straight line. Therefore, the locking portion made of a claw or a needle may be provided so as to protrude from the elastic body so that the protruding directions of both locking portions are aligned on the same straight line in the initial state where the elastic body is unloaded. If the elastic body is linear, the protruding direction of the locking part matches the extending direction of the elastic body, but if the elastic body is curved in a direction to reduce the linear distance between the locking parts, it will be slightly upward The locking portion protrudes so as to be folded back.
[0015]
Communication line will be inserted through over the communication line through tube of the plurality of communication lines laying aid. At this time , in order to improve the positional stability of each communication line laying auxiliary tool due to the weight of the communication line (in particular, prevention of tilting of the elastic body in the direction in which the communication line extends), the communication line insertion tube passes the communication line. By incorporating a hook that engages with the surface of the communication line on the inner surface of the through hole, a one-way joint (generally referred to as a quick joint) that can draw out the communication line only in one direction that does not catch the hook may be used. Each communication line insertion tube of multiple communication line laying aids can withstand the reverse pulling force of the communication line as a whole if it is all directed in the same direction, and if the direction of each communication line insertion tube is staggered It is possible to eliminate the pulling force caused by the communication line between adjacent communication line laying aids.
[0016]
Pressed against the locking portion to the target surface, the positional stability of the communication line laying aid of the present invention realized by phagocytic write force (restoring direction of the elastic body) direction does not interfere with the recovery of the elastic body and strengthening direction (communication Although it is not affected by the external force in the direction in which the line insertion tube is pushed down, it may be affected by tilting that twists the locking portion. From this, it is preferable to set the center of gravity of the communication line laying auxiliary tool below the center of gravity of the elastic body alone. For example, if the communication line insertion tube is fixed to the lower surface of the elastic body, the center of gravity of the communication line laying auxiliary tool is always lower than the center of gravity of the elastic body alone. Moreover, when forming a communication line mounting part, the gravity center of a communication line laying auxiliary tool can be brought below from the gravity center of only an elastic main body by making it into a concave cross-section hook shape with respect to an elastic main body.
[0017]
Further, the positional stability of the communication line laying aid of the present invention, pressed against the substantially uniformly object surface engaging portions at both ends, can be secured by causing equal generate food write power. However, in the installation work using a machine, for example, the posture of the communication line laying auxiliary tool is not appropriate, and the pressure contact degree of each of the pair of locking parts with respect to the target surface (if the locking part is a nail or a needle, It is also possible that the degree of needle biting force) is different. Therefore, even if the degree of pressure contact with the target surface of each locking portion is different, in order to achieve positional stability as a communication line laying auxiliary tool, it is flipped up toward the target surface, and the elastic body is used as a basis for this target surface. An elastic stabilizing part that elastically supports the elastic main body is provided.
[0018]
In addition to the locking part, the elastic stabilizing part increases the part that comes into contact with the target surface, elastically supports the elastic body against the target surface to give a tension to the entire communication line laying aid, especially after installation Stabilize posture against tilting in communication line laying aids. Since the elastic stabilizing portion only needs to elastically support the elastic main body with respect to the target surface, for example, an elastic resin or a foamed resin or a coil spring may be separately attached to the elastic main body. It is good to comprise as a leaf | plate spring which cuts a die | dye together when forming a part (in the case of a nail | claw or a needle | hook) integrally from a metal plate, and it springs up from an elastic main body. The elastic force generated by the elastic stabilizing portion is a force that urges the communication line insertion tube in a downward direction, assists the generation of the restoring force of the elastic main body, and has a function of increasing the degree of pressure contact with the target surface of the locking portion.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an example of a communication line laying assisting tool 5 comprising a linear elastic body 1, a locking part 3 which is a pair of left and right claws 2 and 2, and a pair of left and right elastic stabilizing parts 4 and 4. 2 is a perspective view showing another example of the communication line laying assisting tool 7 composed of the locking portions 3 that are the three needles 6, 6, and 6. FIG. 3 is a front view of the communication line laying assisting tool 5 of this example, FIG. 4 is a plan view of the communication line laying aid 5, FIG. 5 is a side view of a mounting device 9 that carries the communication line laying aid 5 into the mounting tube 8, and FIG. 6 is a rear view of the mounting device 9. 7 is a partial front view showing the inside of the mounting pipe 8 at the stage of pressing the communication line laying aid 5 against the inner surface (target surface) 10 of the communication line. FIG. (Target surface) FIG. 9 is a partial front view showing the inside of the mounting pipe 8 at the stage of being attached to the object 10. FIG. 9 is a diagram showing that the communication line laying auxiliary tool 5 is attached to the pipe inner surface (target surface) 10. A conduit extending direction sectional view showing the floor mounted tube 8.
[0020]
As shown in FIGS. 1 to 3, the communication line laying auxiliary tool 5 of this example has a configuration in which a locking portion 3 and an elastic stabilizing portion 4 are provided on an elastic body 1 that is substantially rectangular and linear in plan view. The locking part 3 is composed of claws 2 and 2 having a substantially triangular shape in a plan view that protrudes outward from the claw base part 11 projecting left and right from both ends of the elastic body 1 in the elastic body extending direction. The locking portion 3 of the present example is configured such that the pair of claws 2 and 2 protrude from the claw base portion 11 projecting to the left and right, thereby tilting (rotating) the communication line laying aid 5 around the one claw 2. Motion) can be prevented by the other claw 2, and the positional stability of the communication line laying aid 5 can be enhanced. Instead of the claw 2, as shown in FIG. 2, a locking portion 3 that is a plurality of (three examples) needles 6, 6, and 6 may be configured. Below, the case of the nail | claw 2 is demonstrated.
[0021]
The elastic stabilizing portion 4 is a substantially trapezoidal shape in a tapered plan view that is bounced upward from the claw base portion 11 in the elastic body extending direction, and is bent in the vicinity of the tip downward so that the target surface does not get caught. A base 57 is formed. The elastic main body 1, the locking portion 3 and the elastic stabilizing portion 4 are integrally formed by removing a die from a single metal plate and bending the elastic stabilizing portion 4 upward.
[0022]
The metal plate that gives elasticity to the elastic body 1 is preferably stainless steel (SUS), titanium or titanium alloy having weather resistance and chemical resistance (acid resistance and alkali resistance). Further, instead of the metal elastic main body, a resin elastic main body, an FRP (particularly, carbon fiber reinforced resin) elastic main body may be used, or a composite structure elastic main body using the above-described materials may be used. Specifically, an elastic main body in which a metal plate is coated with resin, an elastic main body made of a resin plate or FRP plate coated with metal, an elastic main body in which a metal plate and an FRP plate are laminated, or a central portion ( communication line insertion tube) Is made of resin or FRP, and an elastic main body with metal plates protruding on both sides (see FIG. 15 or FIG. 21 described later, the concave section groove 37 is made of resin, and each arm portion 41 is made of metal. Can be exemplified. In addition, the material of the engaging portions at both ends of the elastic body and the communication line insertion tube can be made of metal, resin, FRP, or a combination thereof.
[0023]
Communication wire insertion tube 13, and the elastic body 1 and the separate, which can only lead to a communication line 14 which is inserted in one direction (which can lead to the top from the bottom middle Figure 4) elastic body 1 a one-way joint It is fixed to the center with a rivet 15. The communication line insertion tube 13 that is a one-way joint (quick joint) has a through hole 16 that allows the communication line 14 to be inserted, and a hook (not shown) that engages the surface of the communication line on the inner surface of the through hole 16. Built-in.
[0024]
The communication lines may be inserted through all the communication line insertion pipes of the necessary number of communication line laying aids for constructing the communication line, or as many as necessary for constructing the communication line. After attaching the auxiliary tool to the target surface, the communication line may be inserted from one direction into the communication line insertion tube of each communication line laying auxiliary tool. When inserting communication lines through all communication line insertion tubes in advance, make sure that the length of the communication line between each communication line insertion tube is longer than the installation interval of the communication line laying aid, and leave a margin. After installing the laying aid, it is good to construct a laying state without slack by pulling the communication line from one direction.
[0025]
When attaching the communication line laying auxiliary tool 5 of this example to the pipe inner surface (target surface) 10 of the mounting pipe 8 (a thin pipe having an inner diameter of 10 to 15 cm connecting the main pipe and each house) constituting the sewer pipe, of course. Since attachment by the operator's hand is not possible, for example, an attachment device 9 as shown in FIGS. 5 and 6 is used. The attachment device 9 of this example holds the communication line laying auxiliary tool 5 and carries it into the attachment pipe 8, and pushes up the communication line laying auxiliary tool 5 at the attachment point and presses and contacts the pipe inner surface 10 for attachment. 17 and a monitoring camera 18 that projects forward from the apparatus main body 17 and photographs the pressure contact state of the communication line laying auxiliary tool 5 to the inner surface of the pipeline.
[0026]
The apparatus main body 17 includes an auxiliary tool push-up portion 20 provided with hemispherical protective covers 19 and 19 at the front and rear. The protective cover 19 protects the auxiliary tool push-up portion 20 from obstacles existing in the attachment tube 8 and has a role of pushing away the obstacles when the apparatus main body 17 is pushed or pulled into the attachment tube 8. From this point, if the protective cover 19 can play the role of removing obstacles, the outer shape is not limited to the hemisphere, and even if it is not composed of a continuous surface that completely hides the auxiliary tool push-up portion 20, for example, a mesh surface You may comprise, or you may comprise in the shape of a bowl.
[0027]
The auxiliary tool push-up unit 20 hangs the auxiliary tool holding arms 21 and 21 holding the communication line laying auxiliary tool 5 on the left and right by hooking on the claw base 11 of the locking portion 3, and between the auxiliary tool holding arms 21 and 21. A pair of left and right protrusions 22 and 22 for pushing up the communication line laying aid 5 are provided. In this example, the protrusion 23 at the upper end of the protrusion 22 is fitted into the engagement holes 24, 24 provided in the communication line laying assisting tool 5 so that the communication line laying assisting tool 5 does not fall when the protrusion 22 is pushed up. Yes. When the communication line laying assisting tool 5 is pushed up by the projecting upper part 22 while being restrained by the projecting part 23, the engaging part 3 at both ends is hooked on the assisting instrument holding arm 21, so that it bends upward and protrudes upward. It can be pressed along the road inner surface 10.
[0028]
A moving wheel 25 inclined inward is attached to the lower end of the auxiliary tool holding arm 21. This moving wheel 25 has a configuration in which a ball 26 that can freely move is built in the storage cylinder 27, and the ball can be freely moved so that the protruding portion 22 always faces directly above the mounting tube 8 due to the weight of the pushing-up portion 20 of the auxiliary tool. It is designed to rotate freely. Therefore, in order to ensure that the ball 26 of the moving wheel 25 rotates freely, a moving wheel cover (not shown) that further pushes the obstacle away from the storage cylinder 27 may be provided.
[0029]
Since the surveillance camera 18 has a predetermined subject to be photographed, it is connected from the apparatus main body 17 by a fixed-length support arm 28, and both the photographing direction and the focal point are fixed. A camera base 29 is provided at the bottom of the monitoring camera 18 so as to be in sliding contact with the bottom surface of the pipe line. The monitoring camera 18 and the signal cable 30 of the apparatus main body 17 are pulled out from the rear of the apparatus main body 17, and the entire attachment device 9 is pushed and pulled by pushing and pulling the signal cable 30.
[0030]
The work of attaching the communication line laying auxiliary tool 5 is as follows. First, as shown in FIG. 7, the communication line laying auxiliary tool 5 is pressed against the inner surface 10 of the pipeline using the above-described attachment device or the like as seen in FIG. The communication line laying auxiliary tool 5 that is in pressure contact with the pipe inner surface 10 is pushed by the pipe inner surface 10 to tilt the elastic stabilizing portion 4 and bends the elastic body 1 along the pipe inner surface 10. The claws 2 of the portion 3 are not yet pressed against the inner surface 10 of the pipe, and are oriented in a substantially tangential direction of the inner surface 10 of the pipe following the elastic body 1.
[0031]
Thus, when the load which presses the elastic main body 1 along the pipe inner surface 10 from the curved state is removed, both the locking portions 3 and 3 try to return the curved elastic main body 1 to the straight line which is the initial state. Demonstrate resilience in the direction of separation. As shown in FIG. 8, the claw 2 of each locking portion 3 is pressed against the pipe inner surface 10, and the claw 2 is pierced into the pipe inner surface 10 by the restoring force. When the elastic main body 1 is restored, the center of the elastic main body 1 that has been in pressure contact is separated from the inner surface 10 of the pipe, and the communication line insertion tube 13 is lowered along with this, but the elastic stabilizing portion 4 is still on the inner surface 10 of the pipe. On the other hand, since the elastic main body 1 is stretched in a state of being supported in the elastic state, the positional stability of the communication line laying assisting tool 5 (particularly the posture of the communication line laying assisting tool 5) is ensured.
[0032]
Thus, when a plurality of communication line laying auxiliary tools 5 and 5 are attached to the pipe inner surface 10 at appropriate intervals and the communication line 14 is inserted through the communication line insertion tubes 13 and 13 of each communication line laying auxiliary tool 5, the laying operation is completed. As can be seen in FIG. 9, the communication line 31 in a mode in which the communication line 14 is suspended can be constructed. The communication line laying assisting tool 5 has the elastic body 1 center slightly separated from the pipe inner surface 10 when the claw 2 of the locking portion 3 is pushed up to the pipe inner surface 10 (see FIG. 8). 10, the communication line 31 is also constructed along the pipe inner surface 10. Moreover, since it attaches to the pipe inner surface 10 with the biting force of the nail | claw 2, the communication line laying auxiliary tool 5 of this invention can be attached even if the pipe inner surface 10 inclines or is perpendicular | vertical, for example.
[0033]
In the case of the communication line laying auxiliary tool 5 attached to the mounting pipe 8 as in this example, the proportion of the communication line laying auxiliary tool 5 in the attached state in the circumferential direction of the pipe inner surface 10 of the mounting pipe 8 is 85 to 135 degrees, preferably It is desirable to be within the range of 90 to 120 degrees. The elastic stabilizing portion 4 may protrude obliquely upward with an elevation angle of 5 to 35 degrees, preferably 10 to 30 degrees, with respect to the tangential direction of the elastic body 1.
[0034]
In order to construct the communication line 31 closer to the pipe inner surface 10, for example, the elastic body 33 of the communication line laying auxiliary tool 32 may be bent in the same manner as the pipe inner surface 10. FIG. 10 is a perspective view showing an example of a communication line laying auxiliary tool 32 including a curved elastic body 33, a locking portion 3 that is a pair of left and right claws 2 and 2, and a pair of left and right elastic stabilizing portions 4 and 4. 11 is a front view of the communication line laying assisting tool 32, FIG. 12 is a plan view of the communication line laying assisting tool 32, and FIG. 13 is a step of pressing the communication line laying assisting tool 32 against the pipe inner surface (target surface) 10. FIG. 14 is a partial front view showing the inside of the mounting pipe 8 at a stage where the communication line laying auxiliary tool 32 is attached to the pipe inner surface (target surface) 10.
[0035]
The communication line laying assisting tool 32 of this example is not much different from the above-described communication line laying assisting tool 5 as seen in FIGS. 10 to 11 (comparative control of FIGS. 1 and 10). The difference is that the elastic main body 33 is curved upward and protrudes from the claw base 11 so that the claws 2 of the two locking portions 3 are aligned on the same straight line and protrudes substantially horizontally. Yes (FIG. 3 and FIG. 11 comparative control). The elastic main body 33 is always bent to have a curvature radius Ra larger than the pipe inner surface radius Rt, and as shown in FIG. 13, it can be sure to bend and generate a restoring force when pressed against the pipe inner surface 10. .
[0036]
If the elastic main body 33 is curved, the communication line insertion tube 13 can be attached as close to the inner surface 10 of the conduit. However, this makes it difficult for the claw 2 protruding in the extending direction of the elastic body 33 to pierce the pipe inner surface 10. Therefore, in the communication line laying auxiliary tool 32 of this example, the claw 2 is bent slightly upward from the claw base 11 and protrudes substantially horizontally so that the claw 2 of both locking portions 3 are aligned on the same straight line. Thereby, the restoring force exerted by the elastic body 33 can be efficiently used as a force for piercing the claw 2 into the pipe inner surface 10, and the claw 2 can be surely bitten into the pipe inner surface 10 as seen in FIG. Yes (see enlarged view in FIG. 14).
[0037]
【The invention's effect】
According to the present invention, it is possible to provide a communication line laying aid having excellent positional stability while being an easy mounting operation. The simplicity or ease of the installation work results in simplification of the installation device when automating the installation of the communication line laying auxiliary tool, and enables, for example, an installation device that can enter an installation tube having a small inner diameter. Further, since the actual installation work can be simplified, the construction time of the communication line can be shortened and the cost can be reduced. The cost reduction can also be contributed from the point that the communication line laying aid of the present invention can be manufactured at low cost.
[0038]
The communication line laying auxiliary tool of the present invention can be applied regardless of whether the target surface is horizontal, inclined or vertical as compared with the prior art similar to the prior art, and has excellent positional stability after installation. It has the effect of constructing the track permanently and stably. The positional stability is responsible phagocytic write power of the engaging portion with respect to the target surface. In addition, since the posture of the communication line laying aid by the addition of resilient stabilizer stabilizes, food write force of the locking portion can be stably exhibited. Thus, food write force against the target surface of the locking portion is permanently kept, to achieve the effect of allowing the construction of permanent wire-passing route.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a communication line laying assisting tool including a linear elastic body, a locking portion that is a pair of left and right claws, and a pair of left and right elastic stabilizing portions.
FIG. 2 is a perspective view showing another example of a communication line laying auxiliary tool composed of a locking portion that is three needles.
FIG. 3 is a front view of a communication line laying aid of this example.
FIG. 4 is a plan view of the communication line laying aid.
FIG. 5 is a side view of an attachment device that carries the communication line laying auxiliary tool into the attachment pipe and attaches it.
FIG. 6 is a rear view of the attachment device.
FIG. 7 is a partial front view showing the inside of the attachment pipe at the stage where the communication line laying auxiliary tool is pressed against the inner surface (target surface) of the pipeline.
FIG. 8 is a partial front view showing the inside of the attachment pipe at a stage where the communication line laying auxiliary tool is attached to the inner surface (target surface) of the pipeline.
FIG. 9 is a cross-sectional view in the pipe extension direction showing the inside of the attachment pipe at a stage where the communication line laying auxiliary tool is attached to the pipe inner face (target face).
FIG. 10 is a perspective view showing an example of a communication line laying assisting tool including a curved elastic main body, a locking portion that is a pair of left and right claws, and a pair of left and right elastic stabilizing portions.
FIG. 11 is a front view of the communication line laying aid.
FIG. 12 is a plan view of the communication line laying aid.
FIG. 13 is a partial front view showing the inside of the attachment pipe at the stage where the communication line laying auxiliary tool is pressed against the inner surface (target surface) of the pipeline.
FIG. 14 is a partial front view showing the inside of the attachment pipe at a stage where the communication line laying auxiliary tool is attached to the pipe inner surface (target surface).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Linear elastic body 2 Claw 3 Locking part 4 Elastic stabilization part 5 Communication line laying auxiliary tool 8 Mounting pipe 10 Pipe inner surface (target surface)
11 Nail base 13 Communication line insertion tube 14 Communication line 31 Communication line 57 Elastic support base

Claims (4)

An elastic body of elongated plate spring to the locking portion at both ends, consists of a communications wire insertion tube fixed to the elastic body, sewer pipes, laid down as a target surface a conduit inner surface of the set square or mounting pipe it allows the communication line laying aid for holding the communication line is inserted into the communication line through tube along the object surface, the elastic body contact arc radius is greater than the target surface radius in the unloaded initial state, In a state where a restoring force is generated by bending the linear distance between the locking portions in a direction to shorten, the locking portions at both ends are respectively directed to the target surface, and the locking portion of the elastic body is applied to the target surface by the restoring force. pressed against the by pushing barbs Succoth, communication lines laying aid, characterized in that to position holding the target surface the elastic body by phagocytic write power of the engaging portion with respect to the target surface. Elastic body is flipped toward the target surface, the communication line laying aid according to claim 1 Symbol placement provided an elastic stabilizer for elastically supporting the elastic body underlying the target surface. The communication line laying aid according to claim 1 or 2 , wherein the locking portions are claws provided at both ends of the elastic body. The communication line laying aid according to claim 1 or 2 , wherein the locking portions are needles provided at both ends of the elastic body.

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