JP2019165560A - Tension adjustment device for preventing acceleration for feeding cable - Google Patents

Abstract

To make it possible to adjust and control a constant speed without accelerating a falling speed of a cable when a cable is drawn and extended from an upper story side to a lower story side in a building.SOLUTION: A device frame base 1 is provided with a cable holding mechanism 10 for holding a cable C that falls while being set at an interval corresponding to an outer diameter of the cable C, and a braking mechanism 40 for adjusting and controlling delivery speed by the cable holding mechanism 10. The cable holding mechanism 10 comprises a fixed roller 12 and a slide roller 22 whose interval is slidably adjusted with respect to the fixed roller 12 and rotates in synchronization with the fixed roller 12. The braking mechanism 40 decelerates a fixed roller shaft 13 that supports the fixed roller 12 so as to be suppressed to predetermined speed and adjusts lowering speed by controlling a brake shoe 52 that is crimped against a brake pad 51 of braking means 50 that rotates in synchronization through linkage connection with the fixed roller shaft 13.SELECTED DRAWING: Figure 2

Description

  The present invention, for example, in a building or other multi-story building, when a cable is sequentially routed from the upper floor side to the lower floor side, the cable is prevented from dropping suddenly due to the weight of the cable, etc. The present invention relates to a tension adjusting device for preventing the acceleration of an operation cable that can be adjusted and controlled so as to have a descending speed.

  Conventionally, in order to route cables and the like across a hierarchy in a multi-storey building, lifting the cable from the lower floor to the upper floor is extremely troublesome because the cable itself has a considerable weight. Have difficulty. For this reason, the cables are sequentially drawn out from the upper floor side so as to be suspended from the lower floor side, and are received and laid in order on the lower floor side.

  However, when the cable is laid by lowering the cable from the upper floor side in this way, the cable itself has a considerable weight. There were cases where the cable was unwound and the cable itself was damaged, or an accident such as hurting the worker occurred, and the line work could not be performed safely.

  In order to solve this problem, for example, a method for extending a vertical trunk line in a medium to high-rise building disclosed in Patent Document 1 and an apparatus used therefor have been proposed. This construction method / equipment is used to feed and drop the cable while controlling the speed from the feeding drum device with the speed control device arranged on the high floor, passing the cable through the cable speed control device provided in plural, and sharing its own load Suppose that the line is extended from the top to the bottom.

JP 2011-188563 A

  The cable speed control device in Patent Document 1 is configured such that a cable is passed between a pair of caterpillars composed of rotating endless belts provided opposite to each other, and a speed control brake is provided on at least one of the caterpillars. I'm trying to control the falling speed. However, even if a pair of caterpillars are connected to each other by a link piece, the speed of natural fall cannot be sufficiently controlled unless the falling cable is firmly sandwiched. Moreover, even if the fall speed corresponding to the rotation speed of the caterpillar is controlled by controlling the rotation speed of one of the caterpillars with the speed control brake, since the slip due to the weight of the cable occurs between the caterpillars, the speed at which the cable fall speed is set It is difficult to deal with.

  Therefore, the present invention was created in view of various circumstances that existed in the past, and the purpose of the present invention is to build a cable from a higher floor side to a lower floor side and extend the cable in a multilayer floor building or the like. It is an object of the present invention to provide a tension adjusting device for preventing acceleration for an operation cable, which can be adjusted and controlled to a constant speed without accelerating the falling speed of the cable and can safely perform the wire drawing work.

In order to solve the above-described problem, in the present invention, a tension adjusting device for preventing acceleration of an operation cable when a predetermined cable is descended from an upper floor side to a lower floor side. A cable clamping mechanism 10 that clamps a cable C to be delivered to an installed frame base 1 at a distance corresponding to the outer diameter of the cable C, and a braking mechanism 40 that adjusts and controls the descending speed of the cable clamping mechanism 10. The cable holding mechanism 10 is provided with a fixed roller 12 that is fixed and rotated, a slide roller 22 that is slid with the interval being adjusted relative to the fixed roller 12, and is rotated synchronously with the fixed roller 12. 40 synchronously rotates the fixed roller shaft 13 supporting the fixed roller 12 by being linked to the fixed roller shaft 13. The brake pad 51 of the brake means 50 is decelerated so as to be suppressed to a predetermined descending speed by controlling the brake shoe 52 that presses against the brake pad 51, and the descending speed of the cable C sandwiched between the fixed roller 12 and the slide roller 22 It is characterized by adjusting the above.
The brake means 50 includes a braking shaft 44 supported on the casing base 1, a drum-like brake pad 51 provided on the braking shaft 44 so as to rotate synchronously with the fixed roller 12, and a braking operation section provided on the casing base 1. And a brake shoe 52 provided around the brake shaft 44 and arranged on the inner periphery of the brake pad 51 so as to move outwardly by the operation of 61 and press-contact with the inner peripheral surface of the brake pad 51. can do.
The brake pad 51 is fixed to a transmission board 48 fixed to a brake sprocket gear 45 provided on the brake shaft 44, and the brake sprocket gear 45 is connected to a braked sprocket gear 46 fixed to the fixed roller shaft 13. The brake chain 47 can be configured to rotate in a synchronized manner.
The brake shoe 52 is formed integrally with a swing arm 53 that is swinged and pulled by the operation of the brake operation unit 61, and is disposed around the cam plate 54 that is fitted to the brake shaft 44. The brake pad 51 is pressed against or separated from the brake pad 51 by a plurality of rolling rollers 55 that expand or contract the brake shoe 52 from the inner periphery by moving along the inner and outer directions by the rotation of the cam board 54. Can be configured.
The brake shaft 44 and the fixed roller shaft 13 are rotated synchronously by a brake chain 47 that is looped between the brake sprocket gear 45 fixed to the brake shaft 44 and the braked sprocket gear 46 fixed to the fixed roller shaft 13. Thus, it can be configured.
The brake operation unit 61 includes an adjustment screw 62 screwed into the instrument base 1 so as to be able to advance and retreat, and a swing arm 63 swingably supported by the tool base 1 so as to be swingable by the adjustment screw 62. A link bar 64 that is pulled or pushed back by the swinging swinging arm 63 and linked to the swing arm 53 that is integrally formed with the cam board 54 is provided.

In the tension adjustment device for acceleration prevention for an operation cable according to the present invention configured as described above, when a predetermined cable C is lowered from the upper floor side to the lower floor side and is connected, When the cable C to be guided is routed in a state where the cable C is sandwiched, the braking mechanism 40 controls the descending speed appropriately so that the cable C can be safely routed to a predetermined floor.
The cable clamping mechanism 10 adjusts and sets the interval between the fixed roller 12 and the slide roller 22 according to the outer diameter of the cable C to be passed, and firmly clamps the cable C between the rollers 12 and 22.
The braking mechanism 40 adjusts and controls the rotation of the fixed roller 12 and the slide roller 22 that rotates in synchronization with the cable C sandwiched by the cable clamping mechanism 10 so that the descending speed of the descending cable C increases due to its own weight or the like. Is adjusted to a predetermined descent speed and safely connected.
The operation of the brake operation unit 61 provided on the casing base 1 is performed by controlling the pressure contact action of the brake shoe 52 against the brake pad 51 in the brake means 50, whereby the brake pad 51, the transmission board 48, the brake sprocket gear 45, and the brake chain. 47, the rotation of the fixed roller 12 is braked via the braked sprocket gear 46 and the fixed roller shaft 13, and the operation speed of the cable C to be sandwiched and lowered with the slide roller 22 is adjusted.
The brake operation unit 61 swings the cam panel 54 at a predetermined angle via the swing arm 63, the link bar 64, and the swing arm 53 in response to the screwing of the adjusting screw 62, and this swing is a rolling roller. The brake shoe 52 is expanded or contracted by 55 to be brought into pressure contact with or separated from the brake pad 51, and the rotational action of the fixed roller shaft 13 and the fixed roller is braked by the magnitude of the pressure contact force to the brake pad 51. The sending speed of the cable C is adjusted together with the slide roller 22.

  Since the present invention is configured as described above, for example, when a predetermined cable C is lowered and passed from the upper floor side to the lower floor side in a building or other building, the cable sandwiched by the cable clamping mechanism 10 For example, it is possible to prevent the descending speed from being accelerated and increased with respect to C due to, for example, the weight of the cable C, and to perform adjustment control to an appropriate descending speed. That is, the braking device 40 is connected to the fixed roller 12, and the braking speed is controlled by the brake means 50, so that the fixed roller 12 and the slide roller 22 rotated by the synchronous chain 16 control the rotation speed and the descent speed. Can be adjusted.

  Further, the cable clamping mechanism 10 includes a fixed roller 12 and a slide roller 22 that sandwich the cable C and rotate synchronously with each other. The brake means 50 is a brake pad provided on the brake shaft 44 so as to rotate synchronously with the fixed roller 12. By providing the brake shoe 52 that is pressed against the inner peripheral surface of the 51, the feeding speed by the sandwiching of the fixed roller 12 and the slide roller 22 is controlled by the pressure control of the brake shoe 52 to the brake pad 51 when the cable C is lowered. It can be set by adjusting the tension of the cable, and the line work can be performed safely.

  The brake pad 51 is fixed to a transmission board 48 fixed to a brake sprocket gear 45 provided on the brake shaft 44, and the brake sprocket gear 45 is connected to a braked sprocket gear 46 fixed to the fixed roller shaft 13. Since the brake chain 47 is wound around and synchronized with the brake chain 47, the rotation of the brake pad 51 by the pressure contact of the brake pad 51 of the brake shoe 52 is controlled in synchronization with the rotation of the fixed roller shaft 13, and the brake shoe The control action for 52 is reliably transmitted.

  The brake shoe 52 is integrally formed with a swing arm 53 swinging and towed by the brake operation unit 61 and fitted to the brake shaft 44. The brake shoe 52 is disposed around the cam plate 54 and includes the brake shoe 52 therein. A plurality of rolling rollers 55 that expand or contract from the periphery are pressed against or separated from the brake pad 51. By doing so, the braking force can be adjusted by the strength and magnitude of the pressure contact action of the brake shoe 52 to the brake pad 51, and various cables C by the fixed roller 12 and slide roller 22 as well as the descent distance, installation position, etc. It is also possible to finely adjust and set the descent speed at each installation location.

  The braking operation unit 61 swings the swing arm 63 with an adjustment screw 62 that can be moved back and forth, thereby pulling or pushing back the link bar 64 with the swing arm 63, and swings the swing arm 53 that is integrally formed with the cam board 54. In this way, the cam board 54 can be freely swung and rotated via the swing arm 63, the link bar 64, and the swing arm 53 by the screw rotation of the adjustment screw 62 in the forward and reverse directions. Since it corresponds to the rocking rotation of the cam board 54, the magnitude of the pressure contact force of the brake shoe 52 to the brake pad 51 accompanying the movement of the rolling roller 55 along the inner and outer directions can be adjusted and controlled, and the adjusted rotation angle can be maintained. As a result, a constant delivery speed for the cable C by the cable holding mechanism 10 can be maintained.

  In addition, the code | symbol attached | subjected in each means of the means for solving said subject and the effect of invention was attached | subjected in order to make easy reference with the part which shows each structure part described in drawing. The present invention is not limited to these descriptions, structures, shapes, and the like indicated by reference numerals and the like in the drawings.

It is a perspective view which shows one form for implementing this invention. It is a longitudinal cross-sectional view similarly. It is a plane sectional view which similarly shows the movement adjustment structure of the slide roller in a cable clamping mechanism. Similarly, it is a cross-sectional view of the transmission configuration of the slide roller shaft and the fixed roller shaft in the cable clamping mechanism. It is a plane sectional view of a brake mechanism similarly. It is a longitudinal cross-sectional view which similarly shows a braking mechanism. It is a principal part plane sectional view at the time of braking in a brake mechanism similarly. It is a principal part plane sectional view containing the one part enlarged view at the time of cancellation | release in a braking mechanism similarly. It is a schematic diagram which similarly shows an example of a use condition.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment for carrying out the present invention will be described below with reference to the drawings. Reference numeral 1 shown in the drawing is a box base formed in a box shape. 10 and a braking mechanism 40 are provided. The cable clamping mechanism 10 is, for example, when the cables C are sequentially drawn out in a wire drawing work in which various cables C wired in a building or other building are lowered from the cable drum D arranged on the upper floor to the lower floor. The cable is sent out and lowered by adjusting the holding interval corresponding to the diameter of the cable C. The brake mechanism 40 controls and brakes the cable C to an appropriate operation speed so as to prevent acceleration caused by the weight of the cable C when descending or the like when the cable C is held by the cable holding mechanism 10 and sent out. The descent speed is adjusted.

  The container base 1 itself is formed in a substantially rectangular parallelepiped shape, and is fixedly disposed on the floor surface of the building roof, for example, on the floor surface of the building roof or the like by a not-shown installation base, mounting base, etc. is there. The cable clamping mechanism 10 is disposed on the upper surface of the instrument base 1 and, for example, from a cable drum D so as to draw in and feed out a predetermined cable C together with the feed rollers 4 arranged on the front and rear of the instrument base 1. The cable C that is drawn out and descends is sandwiched. The braking mechanism 40 is configured to be housed inside the casing base 1, and by setting the strength of the braking force by operating an adjustment screw 62 in a braking operation section 61 described later disposed outside the casing base 1, The descent speed can be adjusted.

  The cable clamping mechanism 10 is slidable so as to approach or separate from the roller base 11 disposed on the upper surface of the casing base 1, the fixed roller 12 fixedly disposed on the roller base 11 and rotating, and the fixed roller 12. The movement adjusting means 31 is configured to move and adjust the slide roller 22 arranged so as to rotate synchronously with the fixed roller 12 and the slide block 32 supporting the slide roller 22 to be slid. And comprising.

  The roller base 11 has a substantially rectangular shape in a plane arranged along the longitudinal direction of the device frame base 1, is formed in a groove shape with a cross-section opened downward, and is fixed on the device frame base 1. A fixed roller 12 is fixed to one end of the slide roller, and a slide roller 22 slid along the longitudinal direction is arranged at the other end with respect to the fixed roller 12 so that the distance corresponding to the cable C is adjusted. is there.

  As shown in the figure, the fixed roller 12 and the slide roller 22 that are the rollers for sandwiching the cable C have protrusions arranged along the vertical direction on the outer peripheral surface, and have a predetermined hardness with a predetermined coefficient of friction. The cable C sandwiched between the fixed roller 12 and the slide roller 22 that rotate synchronously can be adjusted to a predetermined lowering speed.

  Then, as shown in FIG. 2, the fixed roller 12 is positioned on the roller base 11 on the fixed roller shaft 13 that is vertically supported by a bearing or the like between the bottom wall 2 and the upper wall 3 of the frame base 1. The fixed roller 12 is supported by the drum-shaped fixed roller support portion 14 that is supported and supported.

  Similarly, as shown in FIG. 2, the slide roller 22 slides similarly to a drum-shaped slide roller support portion 24 supported on a slide roller shaft 23 supported vertically on a slide block 32 in the movement adjusting means 31. The roller 22 is supported by covering it. As shown in the drawing, the slide roller shaft 23 is also supported by a side L-shaped under base 33 that is arranged below the roller base 11 and is connected to the slide block 32 via a bearing. Thus, the vertical shape of the stance is maintained.

  As shown in FIG. 4, the fixed roller 12 and the slide roller 22 are synchronized with the fixed sprocket gear 15 and the slide sprocket gear 25 respectively fixed to the fixed roller shaft 13 and the slide roller shaft 23 so as to rotate synchronously in opposite directions. The chain 16 is looped around the fixed sprocket gear 15 fixed to the fixed roller shaft 13 on the inner periphery and to the slide sprocket gear 25 fixed to the slide roller shaft 23 on the outer periphery. That is, as shown in FIG. 4, the outer periphery of the synchronous chain 16 is passed over the slide sprocket gear 25 by moving reversal sprocket gear 17 and fixed reversal sprocket gear 18 that are supported in pairs at the outer position of slide sprocket gear 25. The fixed roller shaft 13 and the slide roller shaft 23 are mutually connected so that the outer periphery of the synchronous chain 16 meshes with the slide sprocket gear 25 between the moving reversing sprocket gear 17 and the fixed reversing sprocket gear 18. It hangs around so as to rotate in reverse.

  The reversing sprocket gear 17 is supported by the under base 33 so as to move together with the slide roller shaft 23, and the fixed reversing sprocket gear 18 is supported so as not to move to the roller base 11. As described above, each of the reversing sprocket gear 17 and the fixed reversing sprocket gear 18 is located on the outer side of the fixed roller shaft 13 with respect to the slide sprocket gear 25 of the slide roller shaft 23, and is synchronized. The chain 16 meshes with the inner periphery of the chain 16, and the outer periphery of the synchronization chain 16 meshes with the slide sprocket gear 25.

  By doing so, the fixed sprocket gear 15 of the fixed roller shaft 13 meshes with the inner periphery of the synchronous chain 16, so that the fixed roller shaft 13 and the slide roller shaft 23 rotate reversely to each other. In addition, when the slide roller shaft 23 slides with respect to the fixed roller shaft 13 so that the interval between the fixed roller 12 and the slide roller 22 is adjusted, the synchronization chain 16 is not affected even if the interval between the slide roller shaft 23 is wide. Is not relaxed, and a constant tension is always maintained.

  2 and 3, the movement adjusting means 31 rotates along the longitudinal direction of the roller base 11 in the roller base 11 and the slide block 32 that supports the slide roller shaft 23 that supports the slide roller 22. The slide block 32 is freely supported and is arranged in parallel with the feed screw 19 along the longitudinal direction of the roller base 11, and the slide block 32 is inserted through the slide block 32. The guide shaft 36 is provided. An operation head 35 is fixed to the feed screw 34 outside the roller base 11, and the slide block 32 is rotated by rotating the feed screw 34 itself by a screwing operation on the operation head 35. By sliding back and forth, the distance between the slide roller 22 and the fixed roller 12 can be adjusted and set according to the diameter of the cable C.

  The brake mechanism 40 is controlled by adjusting the rotational speed of the fixed roller 12 and further the slide roller 22 by braking the fixed roller shaft 13 directly or indirectly by the brake means 50 as shown in FIGS. There is something to do. In the illustration, the brake roller 52 that presses the brake pad 51 of the brake means 50 that rotates synchronously by connecting the fixed roller shaft 13 to the fixed roller shaft 13 is controlled by controlling the brake shoe 52. The speed is reduced so as to be controlled and controlled at a predetermined speed, and the descending speed of the cable C sandwiched between the fixed roller 12 and the slide roller 22 is braked.

  That is, the brake means 50 includes a brake shaft 44 supported on the housing base 1, a drum-like brake pad 51 provided on the braking shaft 44 so as to rotate in synchronization with the fixed roller shaft 13, and the outside of the housing base 1. The brake shoe 52 is provided around the brake shaft 44 and arranged on the inner periphery of the brake pad 51 so as to move outward by the above operation and press-contact with the inner peripheral surface of the brake pad 51.

  Further, as shown in FIG. 2, the braking mechanism 40 itself includes, for example, a substantially central portion of the instrument base 1 by a support shaft 41 supported in the instrument base 1 and a support arm 42 fixed to the support shaft 41. It is arranged and fixed by a substantially flat box-like brake base 43 having a circular shape on a plane supported at a position, and a braking force is adjusted by an operation on a braking operation section 61 described later from the outside of the instrument base 1. It is like that.

  The brake shaft 44 is also supported by the brake base 43 along the vertical direction so as to be parallel to the fixed roller shaft 13 between the bottom wall 2 and the upper wall 3 of the instrument base 1. A braking sprocket gear 45 is provided on the braking shaft 44 by being fitted or fixed thereto. Between the braking sprocket gear 45 and the braked sprocket gear 46 fixed to the fixed roller shaft 13. The brake sprocket gear 45 and the fixed roller shaft 13 are rotated synchronously by the brake chain 47 that is looped around. In this way, the braking action on the braking sprocket gear 45 controls the rotation of the fixed roller shaft 13 via the braking chain 47 and the braked sprocket gear 46.

  The brake pad 51 is formed in a flat cylindrical shape accommodated in the brake base 43 and is fixed to a transmission board 48 fixed to the brake sprocket gear 45. And the brake shoe 52 which press-contacts the brake pad 51 by expanding outside on the inner peripheral side of the brake pad 51 is disposed on the inner periphery of the brake pad 51 (see FIG. 6). The brake shoe 52 is formed integrally with a swing arm 53 that is swinged and pulled by the operation of a braking operation unit 61 provided outside the instrument base 1, and is a cam board that is fitted to the braking shaft 44. 54, and a plurality of rolling rollers 55 that are arranged around the cam board 54 and are moved along the inner and outer directions by the rotation of the cam board 54 to expand or reduce the brake shoe 52 from the inner periphery thereof, Therefore, the brake pad 51 is pressed against or separated from the brake pad 51.

  As shown in FIGS. 7 and 8, the cam plate 54 is formed in a substantially disk shape, and has a plurality of operating outer edges inclined inward and outward on the outer peripheral surface and a plurality of operating edges arranged between the operating outer edges. A rolling roller 55 is provided between the operating outer edge and the brake shoe 52, and the rolling roller 55 expands the brake shoe 52 by the forward and reverse rotation of the cam panel 54 itself. I try to make it open or shrink. That is, the expansion of the brake shoe 52 is brought into pressure contact with the inner periphery of the brake pad 51 (see FIG. 7) to brake the fixed roller 12, and the reduction of the brake shoe 52 is performed by separating the brake shoe 52 from the brake pad 51 ( (See FIG. 8) The fixed roller 12 rotates freely. Reference numeral 56 denotes an intermediate body interposed between the rolling rollers 55.

  The rotation of the cam plate 54 adjusts and controls the rotation of the fixed roller shaft 13 and thus the fixed roller 12, and the rotation of the cam plate 54 itself is performed by the operation of the braking operation unit 61. As shown in FIG. 5, the braking operation unit 61 is disposed, for example, in the instrument base 1, and is oscillated by an adjustment screw 62 that is screwed into the instrument base 1 so as to freely advance and retract. The swing arm 63 is swingably supported by the device frame base 1, and is pulled or pushed back by the swing swing arm 63, and is connected to the swing arm 53 formed integrally with the cam board 54. And a link bar 64.

  For example, the adjusting screw 62 is screwed into the side wall of the casing base 1 from the outside of the casing base 1 and is rotated by a knob provided on the head of the adjusting screw 62 itself exposed to the outside of the casing base 1. Thus, the adjustment screw 62 can be advanced and retracted. Further, the amount of rotation of the knob corresponds to, for example, the value of the braking force scale displayed on the side surface of the instrument base 1.

  The swing arm 63 is supported in a seesaw shape by a swing support column 65 that is supported by a stance stand along the vertical direction of the instrument base 1, at a substantially half position of the swing arm 63 itself. The tip of the adjustment screw 62 is in contact with one end, and the link bar 64 is connected to the other end.

  In this way, when the adjustment screw 62 is moved forward by a predetermined amount, one end of the swing arm 63 is moved forward and the other end of the swing arm 63 is moved backward in the reverse direction, and the swing arm 53 is pulled to pull the cam board. 54 is swung at a predetermined angle. Corresponding to this swinging range, the rolling roller 55 moves outward to expand the brake shoe 52 and press it against the brake pad 51 with a predetermined pressure. The fixed roller 12 is braked via the sprocket gear 45, the brake chain 47, the braked sprocket gear 46, and the fixed roller shaft 13, and the falling speed when the cable C is routed together with the slide roller 22 is controlled to a predetermined speed. It is.

  Next, an example of the use of this will be described. As shown in FIG. 9, when a predetermined cable C is routed to each level in a building or the like, for example, a cable drum D is arranged on the upper floor, the rooftop, etc. A predetermined cable C is fed from the drum D to the lower floor side. In such a case, the tension adjusting device of the present invention is fixedly arranged at predetermined intervals by a predetermined mounting base on the installation floor of the cable drum D, the wall surface / floor surface on the lower floor side, etc. The distance between the fixed roller 12 and the slide roller 22 in the cable holding mechanism 10 is adjusted by the operation of the movement adjusting means 21 corresponding to the above. Next, the cable C to be fed is sequentially inserted into the tension adjusting device of the present invention, and adjustment control is performed so that the predetermined falling speed is obtained by the braking adjustment by the braking mechanism 40 so that the falling speed of the cable C is not more than necessary. It ’s good.

  In the example shown in the figure, a cable drum jack P or a flex not shown is used in order to reduce a contact load at a lowered part such as a corner part that is lowered vertically from a flat place on the upper floor. In addition, by installing a plurality of tension adjusting devices of the present invention on the upper floor side, it is possible to cope with a great load on the upper floor side. Of course, the number of installations, installation locations, installation intervals, and the like differ depending on the weight of the cable C to be lowered.

C ... Cable D ... Cable drum P ... Cable drum jack 1 ... Instrument frame base 2 ... Bottom wall 3 ... Upper wall 4 ... Delivery roller 10 ... Cable clamping mechanism 11 ... Roller base 12 ... Fixed roller 13 ... Fixed roller shaft 14 ... Fixed Roller support 15 ... fixed sprocket gear 16 ... synchronous chain 17 ... moving reversal sprocket gear 18 ... fixed reversing sprocket gear 22 ... slide roller 23 ... slide roller shaft 24 ... slide roller support 25 ... slide sprocket gear 31 ... movement adjusting means 32 ... Slide block 33 ... Under base 34 ... Feed screw 35 ... Operating head 36 ... Guide shaft 40 ... Brake mechanism 41 ... Support shaft 42 ... Support arm 43 ... Brake base 44 ... Brake shaft 45 ... Brake sprocket gear 46 ... Brake sprocket Gear 47 ... Brake chain 48 ... Transmission board 50 ... Brake means 51 ... Brake pad 52 ... Brake shoe 53 ... Swing arm 54 ... Cam board 55 ... Rolling roller 56 ... Intermediate body 61 ... Brake operation part 62 ... Adjustment screw 63 ... Swing arm 64 ... Link Bar 65 ... swing support column

Claims (6)

  This is a tension adjusting device for preventing the acceleration of an operation cable when a predetermined cable is descended from the upper floor side to the lower floor side, and the cable that is fed out to the frame base installed at a predetermined position is the outer diameter of the cable. A cable holding mechanism that is set at an interval corresponding to the distance between the cable holding mechanism and a braking mechanism that adjusts and controls the descending speed of the cable holding mechanism. The cable holding mechanism is a fixed roller that rotates and is fixed to the fixed roller. The sliding mechanism is equipped with a slide roller that is slid with the interval adjusted and synchronized with the fixed roller. The brake mechanism synchronizes the fixed roller shaft supporting the fixed roller by connecting the fixed roller shaft to the fixed roller shaft. By controlling the brake shoe that presses the brake pad of the rotating brake means against the brake pad It is decelerated to suppress every fixed rollers, tensioning devices acceleration prevention Feeding cable, wherein you have to adjust the lowering speed of the cable sandwiching between slides rollers mutually.   The brake means is directed outward by the operation of a braking shaft supported on the case base, a drum-like brake pad provided on the braking shaft so as to rotate in synchronization with the fixed roller, and a braking operation portion provided on the case base. The brake cable according to claim 1, further comprising: a brake shoe provided around the brake shaft so as to be brought into pressure contact with the inner peripheral surface of the brake pad and disposed on the inner periphery of the brake pad. apparatus.   The brake pad is fixed to a transmission plate fixed to a brake sprocket gear provided on the brake shaft, and the brake sprocket gear is looped around by a braked sprocket gear fixed to a fixed roller shaft and a brake chain. The tension adjusting device for preventing acceleration of a steering cable according to claim 1 or 2, wherein the tension adjusting device is configured to rotate synchronously.   The brake shoe is formed integrally with a swing arm that is swung and pulled by the operation of the brake operation unit, and is fitted around the brake shaft, and is arranged around the cam plate to rotate the cam plate. 4. The brake pad is pressed against or separated from the brake pad by a plurality of rolling rollers that are moved along the inner and outer directions to expand or contract the brake shoe from the inner periphery thereof. A tension adjusting device for preventing acceleration of the operation cable according to claim 1.   3. The brake shaft and the fixed roller shaft are synchronously rotated by a brake chain that is looped between a brake sprocket gear fixed to the brake shaft and a braked sprocket gear fixed to the fixed roller shaft. 5. A tension adjusting device for preventing acceleration of a steering cable according to any one of claims 1 to 4.   The braking operation section includes an adjustment screw screwed into the instrument frame base so as to be able to advance and retreat, a swing arm supported swingably on the instrument frame base so as to be swung by the adjustment screw, and a swinging swinging part. 6. A tension adjusting device for preventing acceleration of a steering cable according to claim 4, further comprising a link bar that is pulled or pushed back by a moving arm and is linked to a swing arm that is integrally formed with a cam panel.

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