CN112615306A - Cable support convenient for laying cable and method - Google Patents

Cable support convenient for laying cable and method Download PDF

Info

Publication number
CN112615306A
CN112615306A CN202011570092.9A CN202011570092A CN112615306A CN 112615306 A CN112615306 A CN 112615306A CN 202011570092 A CN202011570092 A CN 202011570092A CN 112615306 A CN112615306 A CN 112615306A
Authority
CN
China
Prior art keywords
cable
guide
laying
mounting base
driving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011570092.9A
Other languages
Chinese (zh)
Inventor
石家源
袁玉乐
张海涛
彭昆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MCC Tiangong Group Corp Ltd
Original Assignee
MCC Tiangong Group Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MCC Tiangong Group Corp Ltd filed Critical MCC Tiangong Group Corp Ltd
Priority to CN202011570092.9A priority Critical patent/CN112615306A/en
Publication of CN112615306A publication Critical patent/CN112615306A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/06Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H49/00Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
    • B65H49/18Methods or apparatus in which packages rotate
    • B65H49/20Package-supporting devices
    • B65H49/28Turntables, i.e. package resting on a table
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H49/00Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
    • B65H49/18Methods or apparatus in which packages rotate
    • B65H49/34Arrangements for effecting positive rotation of packages
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00Guides for filamentary materials; Supports therefor
    • B65H57/14Pulleys, rollers, or rotary bars

Landscapes

  • Unwinding Of Filamentary Materials (AREA)

Abstract

The invention provides a cable support and a method for conveniently laying cables, which comprises the following steps: the cable drum paying-off device comprises a base structure, and a driving structure and a guiding structure which are arranged on the base structure, wherein the driving structure is used for driving a cable drum to rotate for paying-off; the guide structure is used for guiding the cable. The cable reel has the beneficial effects that the structure is simple, the operation is convenient, the cable reel can be conveniently placed through the placing plate and other structures, the cable reel can be conveniently rotated through the driving motor, the rotating balls and other structures, the laying of cables is convenient, the cable reel is prevented from being worn in the dragging process, the skin abrasion of the cables is prevented, and the use of the cables is prevented from being influenced; can lead to the cable through deflector and first guide post, can lead to the location through center post and second guide post isotructure to the cable, be convenient for lay the cable conductor to the position of placing the cable of predetermineeing, prevent that the cable from sliding at will and making the position that the cable conductor was placed undefined, laying of the cable of being convenient for.

Description

Cable support convenient for laying cable and method
Technical Field
The invention belongs to the technical field of cable laying application, and particularly relates to a cable support convenient for laying a cable and a method.
Background
In the prior art, the cable is made by one or more mutually insulated conductors and outsourcing insulating protection layer, with electric power or information from a wire of transmission to another department, cable laying means along the route of examining through the investigation process of putting, installing the cable in order to form cable run, according to the use occasion, can divide into several kinds of laying modes such as aerial, underground (pipeline and direct-burried), submarine, wall and tunnel, and the laying mode of reasonable selection cable is all very important to guaranteeing transmission quality, reliability and construction maintenance etc. of circuit.
At present, when the cable is laid, the cable reel is heavy and difficult to move and lay, and the cable reel is easy to wear and tear when laying, so that the cable skin is worn and torn, the insulating layer of the cable is easy to damage, the power transmission is influenced, the potential safety hazard is large during use, the laid cable is difficult to be accurately positioned, and the cable laying is inconvenient to carry out. Therefore, a cable holder for facilitating the laying of cables is proposed to solve the above problems.
Disclosure of Invention
The invention aims to provide a cable support and a method for conveniently laying a cable, which are particularly suitable for moving, paying off and laying a cable reel.
In order to solve the technical problems, the invention adopts the technical scheme that: a cable support for facilitating the laying of cables, comprising:
the cable drum paying-off device comprises a base structure, and a driving structure and a guiding structure which are arranged on the base structure, wherein the driving structure is used for driving a cable drum to rotate for paying-off; the guide structure is used for guiding the cable.
Further, the base structure includes: the mounting base comprises mounting bases, supporting legs and sliding wheels, wherein the supporting legs are symmetrically arranged at the bottom of the mounting bases in pairs, and one side, far away from the mounting base plate, of the supporting legs is connected with the sliding wheels.
Further, the driving structure includes: the cable drum comprises a motor mounting frame, a driving motor, a reinforcing shaft, a placing platform and a fixed supporting piece, wherein the motor mounting frame is connected to the bottom of the mounting base, the driving motor is arranged in the motor mounting frame, the output end of the driving motor is connected with the reinforcing shaft, one side, far away from the driving motor, of the reinforcing shaft is connected with the placing platform, and the placing platform is used for placing the cable drum;
the driving motor drives the placing platform to rotate through the reinforcing shaft; the upper portion of the fixed supporting piece is arranged at the bottom of the placing platform and used for supporting the placing platform, and the bottom of the fixed supporting piece is arranged at the top of the mounting base.
Furthermore, a hole for the reinforcing shaft to pass through is formed in the fixed supporting piece, and a rotating port for the reinforcing shaft to pass through is formed in the mounting base.
Further, the driving structure further includes: the rotating ball is arranged at the top of the fixed support piece, and the fixed support piece supports the placing platform through the rotating ball;
preferably, the top of the fixed support member is provided with a plurality of groups of rotating grooves distributed in an annular array, and the inner wall of each rotating groove is rotatably connected with the rotating balls.
Furthermore, the guide structure comprises a first guide structure and a second guide structure, the first guide structure and the second guide structure are arranged at the top of the mounting base in parallel, and the first guide structure and the second guide structure are arranged at the same side of the driving structure.
Further, the first guiding structure comprises: the guide support piece is arranged at the top of the mounting base along the width direction of the mounting base, a mounting opening is formed in the inner wall of the guide support piece, and the mounting opening is rotatably connected with the first guide column;
preferably, the mounting opening is rotatably connected with a plurality of groups of first guide columns which are arranged in parallel.
Further, the second guiding structure comprises: the mounting base is provided with a first guide column, a first limiting plate and a central shaft, the central shaft is arranged along the width direction of the mounting base, the two ends of the central shaft are respectively connected with the first limiting plate, and the bottom of the first limiting plate is connected with the top of the mounting base; the second guide post is provided with a guide port, and the second guide post is connected to the central shaft through the guide port in a penetrating manner;
preferably, the center of the second guide post is provided with the guide opening, the surface of the central shaft is rotatably connected with a plurality of groups of second guide posts, and the surface of each second guide post is provided with a guide groove with an arc structure.
Further, the method also comprises the following steps: the supporting structures are connecting plates arranged on one side of the top of the mounting base, the connecting plates are arranged in pairs, and connecting columns are connected between the connecting plates arranged in pairs;
preferably, a plurality of groups of connecting columns are arranged between the connecting plates which are arranged in pairs in parallel.
In order to achieve the purpose, the invention also provides a using method of the cable support convenient for laying the cable, which comprises the following steps:
connecting an electrical element of the cable bracket with an external power supply and a control switch;
the cable reel is placed in the driving structure, and the driving structure is driven to drive the cable reel to rotate so as to pay off the cable reel;
one end of the laid cable penetrates through the corresponding guide structure, the base structure is pushed to move, and the cable is constructed;
and (5) turning off the external power supply and the control switch, and finishing laying.
Due to the adoption of the technical scheme, the method has the following advantages:
1. the cable reel is convenient to place through the placing plate and other structures, the cable reel is convenient to move through the supporting legs, the sliding wheels and other structures, the cable reel can be convenient to rotate through the driving motor, the rotating balls and other structures, laying of cables is convenient, the cable reel is prevented from being abraded in the dragging process, the surface of the cable is prevented from being abraded, and the use of the cable is prevented from being influenced;
2. can lead to the cable through deflector and first guide post, can lead to the location through center post and second guide post isotructure to the cable, be convenient for lay the cable conductor to the position of placing the cable of predetermineeing, prevent that the cable from sliding at will and making the position that the cable conductor was placed undefined, laying of the cable of being convenient for.
Drawings
FIG. 1 is a schematic overall structure of one embodiment of the present invention;
FIG. 2 is a schematic top view of an embodiment of the present invention;
fig. 3 is a schematic view of a partial structure at a according to an embodiment of the present invention.
In the figure:
1. mounting base 2, supporting leg 3, sliding wheel
4. Motor mounting frame 5, driving motor 6 and reinforcing shaft
7. Placing platform 8, rotating ball 9 and fixed supporting piece
10. Connecting plate 11, connecting column 12 and guide support piece
13. First guide post 14, limiting plate 15, center shaft
16. Second guide post
Detailed Description
The invention is further illustrated by the following examples and figures:
in one embodiment of the present invention, as shown in fig. 1-2, a cable holder for facilitating the laying of cables, comprises: the cable drum paying-off device comprises a base structure, a driving structure, a guiding structure and a supporting structure, wherein the driving structure and the guiding structure are arranged on the base structure, the driving structure is used for driving a cable drum to rotate on a platform for paying off, and the guiding structure is convenient for guiding cables and preventing the cables from being wound with each other to influence construction; the supporting structure is arranged on one side of the base structure and used for pushing the support to move.
The base structure as shown in fig. 1-2 comprises: installation base 1, supporting leg 2 and movable pulley 3, this installation base 1 are the rectangle structure, and supporting leg 2 fixed connection is in the four corners department of installation base 1's bottom, and one side fixedly connected with movable pulley 3 of mounting plate is kept away from to supporting leg 2, and the setting through supporting leg 2 and movable pulley 3 removes the cable drum in the work progress of being convenient for, laying of the cable of being convenient for.
The driving structure shown in fig. 1-2 includes: the motor mounting frame 4, the driving motor 5, the reinforcing shaft 6, the placing platform 7, the rotating ball 8 and the fixed supporting piece 9, the motor mounting frame 4 is fixedly connected to the bottom of the mounting base 1, the cross section of the motor mounting frame 4 is in a U-shaped structure, the driving motor 5 is fixedly connected in the motor mounting frame 4, the output end of the driving motor 5 is connected with a reinforcing shaft 6 through a rotating opening arranged on the mounting base 1, the top end of the reinforcing shaft 6 penetrates through the rotating opening and extends to the upper part of the mounting base 1, the top end of the reinforcing shaft 6 penetrates through a fixed supporting piece 9 and is fixedly connected with a placing platform 7, the fixed supporting piece 9 is fixedly connected with the top part of the mounting base 1, the cross section of the fixed supporting piece 9 is of a circular ring-shaped structure, and a plurality of rotation grooves that are annular array distribution are seted up to fixed support piece 9 top surface, rotate the inslot wall and rotate the connection and rotate ball 8, and fixed support piece 9 supports place the platform 7 through rotating ball 8.
In the working process, the cable reel is placed on the placing platform 7, the driving motor 5 drives the reinforcing shaft 6 to rotate, so that the placing platform 7 is driven to rotate, and the placing platform 7 rolls along the upper part of the fixed supporting piece 9 through the rotating ball 8. The cable reel can be conveniently rotated by the structures such as the driving motor and the rotating balls, the cable reel can be paid off, the cable is prevented from being dragged when being laid, the cable reel is prevented from being abraded in the dragging process, the skin of the cable is prevented from being abraded, and the use of the cable is prevented from being influenced; meanwhile, when the placing platform 7 rotates, the rotating ball 8 can support the placing platform 7 to a certain extent, so that the placing platform 7 rotates more stably, and the cables are laid conveniently.
The guide structure shown in fig. 1-2 comprises a first guide structure and a second guide structure, the first guide structure and the second guide structure are arranged on the mounting base 1 in parallel, and the first guide structure and the second guide structure are arranged on the same side of the driving structure.
The first guide structure as in fig. 1-3 comprises: the mounting structure comprises a guide support piece 12 and first guide posts 13, wherein the guide support piece 12 is fixedly connected to the top of the mounting base 1 along the width direction of the mounting base 1, the length of the guide support piece 12 is equal to the width of the mounting base 1, a mounting opening is formed in the inner wall of the guide support piece 12, the inner wall of the guide support piece 12 is rotatably connected with the first guide posts 13 through the mounting opening, and the inner wall of the guide support piece 12 is rotatably connected with a plurality of first guide posts 13; in the preferred embodiment, 5 first guide posts 13 are arranged on the inner wall of the guide support 12, and the number of the first guide posts 13 can be increased according to construction requirements in the actual construction process. Can lead the cable through direction support piece 12 and first guide post 13, be convenient for lay the cable conductor to the position of predetermineeing the placing cable, prevent that the cable from sliding at will and making the position that the cable conductor was placed undefined, the laying of the cable of being convenient for.
The second guide structure includes: second guide post 16, limiting plate 14 and central axle 15, the parallel direction support piece 12 of limiting plate 14 sets up the homonymy at the drive structure, the perpendicular fixed connection in the top of installation base 1 in bottom of limiting plate 14, central axle 15 sets up on the width direction of installation base 1, the both ends of central axle 15 all are connected with a limiting plate 14, central axle 15 rotates on the surface and connects second guide post 16, wherein second guide post 16 center department has seted up the direction mouth, 15 one end of central axle runs through the direction mouth and extends to second guide post 16 one side, 15 rotations on the surface of central axle are connected with a plurality of second guide post 16, and the guide way of arc structure is seted up on the 16 surfaces of second guide post, in this preferred embodiment, 15 rotations on the surface of central axle are connected with 4 second guide posts 16, lead to the cable that comes out from first guide structure. The cable can be guided and positioned through the second guide post 16, the limiting plate 14 and the central shaft 15, the cable is convenient to lay to the preset position where the cable is placed, the cable is prevented from sliding randomly, the position where the cable is placed is not clear, and the laying of the cable is convenient.
As shown in fig. 1-2, the support structure comprises: the connecting plate 10 and the spliced pole 11, connecting plate 10 set up in pairs in the one side at installation base 1 top, and the equal rigid coupling in spliced pole 11 both ends has connecting plate 10, and parallel arrangement has multiunit spliced pole 11 between the connecting plate 10 that sets up in pairs. In this embodiment, two connecting columns 11 are arranged in parallel between the connecting plates 10 arranged in pairs, and a plurality of connecting columns 11 are fixedly connected to one side of each connecting plate 10.
The working process of one embodiment of the invention is as follows:
firstly, an external power supply and a control switch are connected with electrical components in the device, then a cable reel is placed on a placement platform 7, then one end of a cable passes through the middle of two corresponding first guide columns 13 according to the position of the cable to be placed, namely, the cable passes through a mounting opening formed in a guide support 12, then the cable is wound from the upper side of a corresponding second guide column 16 and is placed at the position where the cable needs to be laid, then a connecting column 11 and a connecting plate 10 are utilized to pull the mounting base 1, so that the cable moves under the action of a sliding wheel 3, meanwhile, a driving motor 5 is started, so that a reinforcing shaft 6 is driven to rotate, the placement platform 7 is driven to rotate, the cable reel is rotated, the cable reel is paid off, the cable is prevented from being dragged during cable laying, the abrasion of an early cable reel is prevented, the damage of the cable skin is prevented, the use of the cable is prevented from being influenced, the rotating ball 8 can play a certain supporting role for the placing platform 7, so that the placing platform 7 is more stable in rotation, the laying of the cable is facilitated, the external power supply and the control switch are turned off after the cable construction is finished, and the laying is completed.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (10)

1. A cable support for facilitating the laying of cables, comprising:
the cable drum paying-off device comprises a base structure, and a driving structure and a guiding structure which are arranged on the base structure, wherein the driving structure is used for driving a cable drum to rotate for paying-off; the guide structure is used for guiding the cable.
2. A cable support for facilitating the laying of cables according to claim 1, wherein: the base structure includes: the mounting base comprises mounting bases, supporting legs and sliding wheels, wherein the supporting legs are symmetrically arranged at the bottom of the mounting bases in pairs, and one side, far away from the mounting base plate, of the supporting legs is connected with the sliding wheels.
3. A cable support for facilitating the laying of cables according to claim 2, wherein: the driving structure includes: the cable drum comprises a motor mounting frame, a driving motor, a reinforcing shaft, a placing platform and a fixed supporting piece, wherein the motor mounting frame is connected to the bottom of the mounting base, the driving motor is arranged in the motor mounting frame, the output end of the driving motor is connected with the reinforcing shaft, one side, far away from the driving motor, of the reinforcing shaft is connected with the placing platform, and the placing platform is used for placing the cable drum;
the driving motor drives the placing platform to rotate through the reinforcing shaft; the upper portion of the fixed supporting piece is arranged at the bottom of the placing platform and used for supporting the placing platform, and the bottom of the fixed supporting piece is arranged at the top of the mounting base.
4. A cable support for facilitating the laying of cables according to claim 3, wherein: the fixed support piece is provided with a hole for the reinforcing shaft to pass through, and the mounting base is provided with a rotating port for the reinforcing shaft to pass through.
5. A cable support for facilitating the laying of cables according to claim 3 or 4, wherein: the driving structure further includes: the rotating ball is arranged at the top of the fixed support piece, and the fixed support piece supports the placing platform through the rotating ball;
preferably, the top of the fixed support member is provided with a plurality of groups of rotating grooves distributed in an annular array, and the inner wall of each rotating groove is rotatably connected with the rotating balls.
6. A cable support for facilitating the laying of cables according to claim 2, wherein: the guide structure comprises a first guide structure and a second guide structure, the first guide structure and the second guide structure are arranged in parallel at the top of the mounting base, and the first guide structure and the second guide structure are arranged at the same side of the driving structure.
7. A cable support for facilitating the laying of cables according to claim 6, wherein: the first guide structure comprises: the guide support piece is arranged at the top of the mounting base along the width direction of the mounting base, a mounting opening is formed in the inner wall of the guide support piece, and the mounting opening is rotatably connected with the first guide column;
preferably, the mounting opening is rotatably connected with a plurality of groups of first guide columns which are arranged in parallel.
8. A cable support for facilitating the laying of cables according to claim 6, wherein: the second guide structure comprises: the mounting base is provided with a first guide column, a first limiting plate and a central shaft, the central shaft is arranged along the width direction of the mounting base, the two ends of the central shaft are respectively connected with the first limiting plate, and the bottom of the first limiting plate is connected with the top of the mounting base; the second guide post is provided with a guide port, and the second guide post is connected to the central shaft through the guide port in a penetrating manner;
preferably, the center of the second guide post is provided with the guide opening, the surface of the central shaft is rotatably connected with a plurality of groups of second guide posts, and the surface of each second guide post is provided with a guide groove with an arc structure.
9. The cable holder for facilitating the laying of cables of claim 2, further comprising: the supporting structures are connecting plates arranged on one side of the top of the mounting base, the connecting plates are arranged in pairs, and connecting columns are connected between the connecting plates arranged in pairs;
preferably, a plurality of groups of connecting columns are arranged between the connecting plates which are arranged in pairs in parallel.
10. A method of using a cable support for facilitating the laying of cables according to claim 1, characterized by the steps of:
connecting an electrical element of the cable bracket with an external power supply and a control switch;
the cable reel is placed in the driving structure, and the driving structure is driven to drive the cable reel to rotate so as to pay off the cable reel;
one end of the laid cable penetrates through the corresponding guide structure, the base structure is pushed to move, and the cable is constructed;
and (5) turning off the external power supply and the control switch, and finishing laying.
CN202011570092.9A 2020-12-26 2020-12-26 Cable support convenient for laying cable and method Pending CN112615306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011570092.9A CN112615306A (en) 2020-12-26 2020-12-26 Cable support convenient for laying cable and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011570092.9A CN112615306A (en) 2020-12-26 2020-12-26 Cable support convenient for laying cable and method

Publications (1)

Publication Number Publication Date
CN112615306A true CN112615306A (en) 2021-04-06

Family

ID=75247953

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011570092.9A Pending CN112615306A (en) 2020-12-26 2020-12-26 Cable support convenient for laying cable and method

Country Status (1)

Country Link
CN (1) CN112615306A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116231525A (en) * 2023-03-14 2023-06-06 安徽云翼航空技术有限公司 Cable paying-off and laying robot

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116231525A (en) * 2023-03-14 2023-06-06 安徽云翼航空技术有限公司 Cable paying-off and laying robot
CN116231525B (en) * 2023-03-14 2023-09-12 安徽云翼航空技术有限公司 Cable paying-off and laying robot

Similar Documents

Publication Publication Date Title
CN116706777A (en) Cable laying construction device and construction method
CN216311447U (en) Cable production stranded conductor device
CN112615306A (en) Cable support convenient for laying cable and method
CN210914826U (en) Auxiliary pay-off device for power supply construction
CN209747244U (en) Special automatic stranding machine of electrician's machinery convenient to adjust
CN214755196U (en) Cable support convenient to lay cable
CN213622698U (en) Cable paying-off device for power construction
CN112850326A (en) Smart power grids circuit is laid and is walked line pay-off
CN210245153U (en) A transposition stranding equipment for cable conductor
CN213185292U (en) Rotary pay-off rack applicable to cables of different specifications
CN211556686U (en) Cable laying and tensioning device for electric power engineering
CN108422046A (en) Cable cutting equipment
CN212113319U (en) Horizontal cable-former hank body
CN211670549U (en) Water conservancy construction cable installation mechanism
JP2903046B2 (en) Electric cable relay device for moving objects
CN220209813U (en) Auxiliary device for cable laying
CN214314298U (en) High-voltage power cable outer sheath repair equipment
CN218371048U (en) Electric cable laying equipment
US3279758A (en) Apparatus and method for lashing and placing aerial cable and strand
CN219906520U (en) Auxiliary paying-off device for electric installation cable
CN114203362B (en) Phase detection device applied to cradle cabling machine
CN216583439U (en) Cable pay-off for weak current engineering that flexibility is high
CN219420113U (en) Cable traction machine
CN220906836U (en) Cable paying-off device
CN212832045U (en) Copper wire rewinding machine for wires and cables

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination