Movable type platform fence

Abstract

To provide a new technology for enabling adjustment work related to a timing belt of a movable type platform fence.SOLUTION: A movable type platform fence 10 is provided with a timing belt 26 stretched between a drive pulley and a driven pulley 30 provided in a door pocket part 12. A movable fence is connected to the timing belt 26. The driven pulley 30 is fastened to a prescribed position of the door pocket part 12 through an eccentric shaft part 40 eccentric to the axis of a fastening bolt 49. The eccentric shaft part 40 has a tool engagement part 48 and can change a posture to be fastened by making the eccentric shaft part 40 rotate by a tool with the fastening bolt 49 as an axis. Adjustment related to extension of the timing belt 26 can be performed by changing distance between a rotation shaft position of the driven pulley 30 and the drive pully by changing the posture to be fastened of the eccentric shaft part 40.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a movable platform fence. [Background technology]

[0002] Movable platform gates are known that use a timing belt (a toothed belt, a cog belt) to move the movable fence in and out of a door pocket to open and close it. Patent Document 1 discloses a technology for an adjustment device related to the tensioning of the timing belt in such movable platform gates. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-138344 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0004] However, the adjustment device in Patent Document 1 is a device that adjusts the gap between one end and the other end of a timing belt when the two ends are connected to form a loop. Therefore, the technology in Patent Document 1 can only be applied to a limited number of movable platform gates.

[0005] The problem that the present invention aims to solve is to provide a new technology that enables adjustment work related to the timing belt of a movable platform gate. [Means for solving the problem]

[0006] A first form for solving the above problem is a movable platform fence that includes a drive pulley and a driven pulley provided in a door pocket section, and a timing belt that is stretched between the drive pulley and the driven pulley, and that opens and closes a movable fence by driving the timing belt, wherein the driven pulley is fastened to a predetermined position in the door pocket section by a fastening bolt that can be loosened from the platform side, and has an eccentric shaft section that can change its fastened position, and an idle pulley around which the timing belt is stretched and which rotates using the eccentric shaft section as a bearing.

[0007] The second form is a movable platform gate of the first form, in which the idle pulley is a bearing structure having rolling elements between an inner ring portion and an outer ring portion, and the eccentric shaft portion is a movable platform gate that clamps the inner ring portion between the door pocket portion by the fastening.

[0008] The third form is a movable platform gate in which, in the second form of movable platform gate, the eccentric shaft portion has a main body portion that is inserted into the inner ring portion, and the inner ring portion and the main body portion are shaped to fit together.

[0009] In any of the first to third types of movable platform gates, the relative position of the driven pulley and the driving pulley can be changed by changing the fastening position of the eccentric shaft portion, making it possible to easily perform adjustment work related to the tensioning of the timing belt.

[0010] The fourth form is a movable platform fence that opens and closes a movable fence by driving a timing belt whose one end is fixed to the movable fence, and the movable fence has a belt clamp that clamps the one end, and an adjustment bolt that screws into the belt clamp and whose screwing direction is the direction in which the tension of the timing belt is adjusted.

[0011] The fifth form is a movable platform fence of the fourth form, in which the movable fence has a guide groove portion through which the timing belt passes, and the belt clamp has an engaging portion that fits loosely into the guide groove portion.

[0012] The sixth form is a movable platform fence of the fifth form, in which the movable fence has a bolt stopper on the door end side of the guide groove portion, and the adjustment bolt is inserted from the door end side of the bolt stopper.

[0013] In any of the fourth to sixth types of movable platform gates, the position of one end of the timing belt fixed to the movable gate can be easily changed by tightening or loosening the adjustment bolt, making it possible to perform adjustment work related to the tensioning of the timing belt.

[0014] A seventh embodiment is a movable platform fence that includes a drive pulley and a driven pulley provided in a door pocket portion, and a timing belt that is stretched across the drive pulley and the driven pulley, and that opens and closes the movable fence by driving the timing belt, The movable fence includes a first adjustment mechanism having a belt clamp that clamps one end of the timing belt and an adjustment bolt that screws into the belt clamp and whose screwing direction is a direction in which the tension of the timing belt is adjusted, The driven pulley is a movable platform gate equipped with a second adjustment mechanism having an eccentric shaft portion that is fastened to a predetermined position in the door pocket portion by a fastening bolt that can be loosely inserted from the platform side and whose fastened position can be changed, and an idle pulley around which the timing belt is stretched and which rotates using the eccentric shaft portion as a bearing.

[0015] According to the seventh form of the movable platform gate, the position of one end of the timing belt fixed to the movable fence can be easily changed by tightening or loosening the adjustment bolt of the first adjustment mechanism. This makes it possible to perform adjustment work related to the tensioning of the timing belt. Furthermore, by changing the position (fastened position) in which the eccentric shaft portion of the second adjustment mechanism is fastened to the door pocket portion, it is possible to change the relative position of the driven pulley and the drive pulley and perform adjustment work related to the tensioning of the timing belt. In other words, it is possible to perform adjustment work related to the tensioning of the timing belt in two ways.

[0016] The eighth form is a movable platform gate of the seventh form, in which the door pocket portion has a removable cover on the platform side, and the driven pulley is exposed so that the fastened position can be changed by removing the cover.

[0017] With the eighth type of movable platform gate, the worker performing the adjustment work can easily change the fastening position of the driven pulley by removing the cover on the platform side of the door pocket section. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a front view of the movable platform gate of the first embodiment, viewed from the platform side. [Figure 2] FIG. 4 is a perspective view showing an example of the configuration of a driven pulley. [Figure 3] 10A and 10B are diagrams for explaining adjustment of the timing belt by changing the fastened position of the driven pulley. [Figure 4] FIG. 10 is a front external view showing an example of the configuration of a movable platform gate according to a second embodiment. [Figure 5] FIG. 10 is a front view showing an example of the structure around the drive mechanism of the second embodiment. [Figure 6] FIG. 10 is a perspective view showing an example of the structure around the drive mechanism of the second embodiment. [Figure 7] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, embodiments of the present invention will be described, but it goes without saying that the forms to which the present invention can be applied are not limited to the following embodiments.

[0020] [First embodiment] FIG. 1 is a front external view of the movable platform fence 10 as seen from the platform side. The movable platform fence 10 has a door pocket section 12 fixed to the platform 3, left and right movable fences 14 (14a, 14b) supported so as to be able to slide freely laterally relative to the door pocket section 12, and two drive mechanism sections 20 (20a, 20b) provided within the door pocket section 12.

[0021] The door pocket 12 has removable covers 13 on both the platform side and the track side. For convenience, in Figure 1, the platform side cover 13 is partially cut away so that the inside of the door pocket 12 can be seen.

[0022] The drive mechanism 20 (20a, 20b) is housed in the door pocket 12. One drive mechanism unit 20 has a motor 22 fixed to one of the left and right sides of the door pocket unit 12, a drive pulley 24 driven by the motor 22, a driven pulley 30 fixed to the other of the left and right sides of the door pocket unit 12, and a circular timing belt 26 (toothed belt, cog belt) stretched between the drive pulley 24 and the driven pulley 30.

[0023] The left or right movable fence 14a is connected to a timing belt 26a of one of the two drive mechanism units 20a by a fixture 28a. The other left or right movable door 14b is connected to a timing belt 26b of the other drive mechanism unit 20b by a fixture 28b. The drive mechanism units 20 (20a, 20b) each drive a motor 22 to drive the timing belt 26, thereby moving the movable fences 14 (14a, 14b) connected to the timing belt 26.

[0024] 2 is a perspective view showing an example of the configuration of the driven pulley 30. For convenience, the teeth of the timing belt 26 are not shown. The driven pulley 30 is fixed to the frame of the door pocket 12 via a support bracket 16. The driven pulley 30 has an eccentric shaft portion 40, a fastening bolt 49, and an idle pulley 50.

[0025] The eccentric shaft portion 40 is fastened and fixed to the support fitting 16 with a fastening bolt 49 . Specifically, a fastening bolt 49 is inserted into the bolt insertion hole 41 of the eccentric shaft portion 40 from the platform side, and the fastening bolt 49 is threaded into the female thread portion 17 of the support bracket 16. The eccentric shaft portion 40 can be rotated around the fastening bolt 49 as an axis to change its position (fastened position) relative to the door pocket portion 12 when the fastening bolt 49 is tightened. Note that although a hexagon socket head bolt is shown as an example of the fastening bolt 49, bolts of other shapes may also be used.

[0026] The eccentric shaft portion 40 has a bolt insertion hole 41, a main body portion 42, a fitting shaft portion 44, and a flange portion 46, with the flange portion 46 located on the platform side. The bolt insertion hole 41 passes through the flange portion 46, the main body portion 42, and the fitting shaft portion 44. The main body portion 42 has an eccentric axis that is parallel to but eccentric with the axis of the bolt insertion hole 41 and has a cylindrical outer shape. The fitting shaft portion 44 has a cylindrical outer shape but is thinner than the main body portion 42 and fits into the fastening shaft hole 18 of the support bracket 16. The flange portion 46 is an enlarged diameter portion coaxial with the main body portion 42. The flange portion 46 has a tool engagement portion 48 on the platform side. In this embodiment, a crab wrench is used as an adjustment tool for the timing belt 26. Therefore, the tool engagement portion 48 is a hole into which the pin of the crab wrench is inserted. The shape and position of the tool engaging portion 48 can be set appropriately depending on the tool to be used.

[0027] The idler pulley 50 is a bearing structure having rolling elements between an inner ring portion 51 and an outer ring portion 53 around which the timing belt 26 is wound. The inner diameter of the inner ring portion 51 is set so that the eccentric shaft portion 40 fits into the inner ring portion 51 as a bearing for the eccentric shaft portion 40.

[0028] When the eccentric shaft portion 40 is inserted into the inner ring portion 51 from the platform side and fastened with the fastening bolts 49, the flange portion 46 of the eccentric shaft portion 40 comes into close contact with the platform side surface of the inner ring portion 51, clamping the inner ring portion 51 between it and the door pocket portion 12 and fixing the inner ring portion 51 to the door pocket portion 12. Because the idle pulley 50 is a bearing structure, the outer ring portion 53 rotates freely as the timing belt 26 moves, even when the inner ring portion 51 is fixed.

[0029] The idle pulley 50 may not be a bearing structure, but may be an integrated pulley with no distinction between the inner ring portion 51 and the outer ring portion 53. In this case, the idle pulley 50 is configured to rotate by sliding on the outer peripheral surface of the eccentric shaft portion 40.

[0030] Figure 3 is an enlarged front view of the driven pulley 30 and its surroundings seen from the platform side to explain the adjustment of the timing belt by changing the fastened position of the driven pulley 30. Figure 3(1) shows the maximum adjustment state to decrease the belt tension, and Figure 3(3) shows the maximum adjustment state to increase the belt tension. Figure 3(2) shows an intermediate adjustment state between these two.

[0031] For example, when adjusting the tension of the timing belt 26, the worker removes the cover 13 on the platform side of the door pocket 12 and sets a tension meter on the timing belt 26.

[0032] Next, the worker inserts the pin of the crab wrench 9 into the tool engagement portion 48 from the platform side, and loosens the fastening bolt 49 with a hex wrench to release the fastening of the eccentric shaft portion 40. Then, using the position of the fastening bolt 49 as a guide, the worker turns the eccentric shaft portion 40 clockwise or counterclockwise as viewed from the front with the crab wrench so that the measurement value of the tension meter falls within a predetermined target range.

[0033] To decrease the tension of the timing belt 26, gradually rotate the eccentric shaft 40 to change the fastened position so that the fastening bolt 49 approaches the 9 o'clock position when viewed from the front, as shown in Figure 3(1). To increase the tension of the timing belt 26, gradually rotate the eccentric shaft 40 to change the fastened position so that the fastening bolt 49 approaches the 3 o'clock position when viewed from the front, as shown in Figure 3(3). Then, once the belt tension is appropriate, tighten the fastening bolt 49 to fix the eccentric shaft 40.

[0034] In this adjustment work, the rotation axis of the driven pulley 30 can be easily moved toward or away from the drive pulley 24 between the position shown in Figure 3(1) and the position shown in Figure 3(3), and adjustment work related to the tensioning of the timing belt 26 can be performed. Specifically, the tension of the timing belt 26 can be adjusted. The adjustment work can be performed easily because it can be done from the platform side.

[0035] Second Embodiment Next, a second embodiment will be described. Note that the same components as those in the first embodiment will be assigned the same reference numerals as those in the first embodiment, and redundant explanations will be omitted.

[0036] 4 is a front external view showing a configuration example of a movable platform fence 10B according to the second embodiment, in which a part of the cover 13 is cut away. The movable platform fence 10B has one door pocket portion 12 and two movable fences 14 (14a, 14b).

[0037] The first movable fence 14 (14a) and the second movable fence 14 (14b) have left-right mirror images of each other in appearance and basic structure. The first movable fence 14 (14a) is supported on one side of the door pocket 12 and is moved by a first drive mechanism 80 (80a) built into the door pocket 12. The second movable fence 14 (14b) is supported on the other side of the door pocket 12 and is moved by a second drive mechanism 80 (80b) built into the door pocket 12.

[0038] Fig. 5 is a front view showing an example of the structure around the drive mechanism 80. Fig. 6 is a perspective view showing an example of the structure around the drive mechanism 80. Both figures show the trailing edge side of the first movable fence 14 (14a), with the first movable fence 14 (14a) protruding from the door pocket 12. For convenience, in Fig. 5, the lower part of the platform side of the movable fence 14 has been cut away so that the interior can be seen. In Fig. 6, the trailing edge side end of the movable fence 14 has been cut away so that the interior can be seen.

[0039] As shown in FIGS. 5 and 6, the drive mechanism 80 includes a motor 22, a drive pulley 24, a first driven pulley 30 (30c), a second driven pulley 30 (30d), and a timing belt 26B.

[0040] The motor 22 , the drive pulley 24 , the first driven pulley 30 ( 30 c ), and the second driven pulley 30 ( 30 d ) are fixed to the frame 11 of the door pocket portion 12 .

[0041] One end of the timing belt 26B is fixed to the movable fence 14 at the lower part of the trailing edge of the movable fence 14 by a belt clamp 90. The other end of the timing belt 26B is clamped and fixed to the lower part of the leading edge of the movable fence 14 (not shown).

[0042] The first driven pulley 30 (30c) and the second driven pulley 30 (30d) each have the same configuration as the driven pulley 30 of the first embodiment (see FIG. 2). The head of the fastening bolt 49 between the first driven pulley 30 (30c) and the second driven pulley 30 (30d) faces the platform side. The flange portion 46 of the eccentric shaft portion 40 and the fastening bolt 49 are exposed on the platform side when the platform-side cover 13 of the door pocket portion 12 is removed (see Figure 4).

[0043] The timing belt 26B is wound around the drive pulley 24, the first driven pulley 30 (30c), and the second driven pulley 30 (30d). Starting from one end, the timing belt 26B first starts from the belt clamp 90, is wound around the second driven pulley 30 (30d), is then wound around the drive pulley 24, is then wound around the first driven pulley 30 (30c), and finally reaches the other end.

[0044] Therefore, when the motor 22 is driven, the timing belt 26B moves left and right relative to the door pocket portion 12 in Figures 5 and 6 via the drive pulley 24, and the movable fence 14 fixed to the timing belt 26B moves left and right together with the timing belt 26B.

[0045] 7 is a perspective exploded view of the belt clamp 90. The belt clamp 90 has a clamp portion 91, a bolt stopper 92, and an adjustment bolt 93.

[0046] The clamp portion 91 is a component that clamps one end of the timing belt 26B. For example, the clamp portion 91 may be divided into two pieces, an upper piece and an lower piece, and the two pieces may clamp one end of the timing belt 26B from above and below.

[0047] The clamp portion 91 has fitting portions 94 that protrude toward both the platform side and the track side. The fitting portions 94 are loosely fitted into the guide grooves 14m of the movable fence 14 (see FIGS. 5 and 6).

[0048] The guide groove 14m is a groove provided at the bottom of the movable fence 14 along the longitudinal direction (the direction in which the movable fence 14 advances and retreats; the same as the direction of movement relative to the door pocket 12) so as to have a gap through which the timing belt 26B passes. In other words, the belt clamp 90 is supported so as to be slidable relative to the movable fence 14 along the longitudinal direction of the movable fence 14.

[0049] The clamp part 91 has a female screw part 95 on the side surface on the door trailing edge side that screws into the adjustment bolt 93. The female screw part 95 is a screw hole that is oriented in the direction along which the clamp part 91 can slide.

[0050] It is preferable to form the frame of the movable fence 14 as an extruded aluminum alloy material, since the guide grooves 14m of the movable fence 14 are made at the same time as the frame material is manufactured.

[0051] The bolt stopper 92 is inserted into and fixed in the opening of the guide groove 14m, and corresponds to a cap that seals the opening. The bolt stopper 92 has an insertion hole 96 for the adjustment bolt 93 on its end surface on the trailing edge side. The insertion hole 96 has a narrow hole through which the neck portion of the adjustment bolt 93 passes, and an accommodating recess that accommodates the head of the adjustment bolt 93. Therefore, when the adjustment bolt 93 is inserted into the insertion hole 96 from the side surface of the bolt stopper 92 on the trailing edge side and screwed into the clamp portion 91, the head of the adjustment bolt 93 is hidden inside the bolt stopper 92 (see Figure 6).

[0052] When the adjustment bolt 93 is screwed into the female thread portion 95 of the clamp portion 91, the clamp portion 91 pulls one end of the timing belt 26B toward the trailing edge of the movable fence 14. In other words, the belt clamp 90 functions as a first adjustment mechanism 101 that adjusts the tension of the timing belt 26B using the adjustment bolt 93. Therefore, the first adjustment mechanism 101 can adjust the tension of the timing belt 26B.

[0053] The first driven pulley 30 (30c) and the second driven pulley 30 (30d) each have the same configuration as the driven pulley 30 of the first embodiment, and therefore function as a second adjustment mechanism 102 that can adjust the tension of the timing belt 26B.

[0054] In terms of the amount of adjustment, the first adjustment mechanism 101 is set for relatively large adjustments, such as adjusting the initial tension of the timing belt 26B when assembling the movable platform fence 10B for installation, while the second adjustment mechanism 102 is set for relatively small adjustments, such as adjustments during periodic inspections after the movable platform fence 10B has been installed.

[0055] The second adjustment mechanism 102 can adjust the tensioned position of the timing belt 26B by changing the fastening posture so as to change the front view positions of the fastening bolts 49 of the first driven pulley 30 (30c) and the second driven pulley 30 (30d). Thus, the second adjustment mechanism 102 can adjust not only the tension of the timing belt 26B but also the degree of engagement and engagement with the drive pulley 24, thereby appropriately preventing tooth skipping.

[0056] As described above, according to the second embodiment, similarly to the first embodiment, adjustment work relating to the timing belt of the movable platform fence can be performed. Specifically, when installing movable platform fence 10B, workers mainly adjust first adjustment mechanism 101, and after installing movable platform fence 10B, they mainly adjust second adjustment mechanism 102, which can be easily accessed by removing cover 13 on the platform side of door pocket section 12. Because the first adjustment mechanism 101 is for relatively large adjustments and second adjustment mechanism 102 is for relatively small adjustments, the adjustment work can be completed quickly with little man-hours.

[0057] [Modification] The above describes examples of embodiments to which the present invention is applied, but the application forms of the present invention are not limited to these, and components can be added, omitted, or modified as appropriate without departing from the spirit of the invention.

[0058] For example, both the movable platform fence 10 of the first embodiment and the movable platform fence 10B of the second embodiment have been illustrated as having two movable fences 14, but they may also be configured to have one movable fence 14.

[0059] Also, from the second embodiment, it is possible to configure one or both of the first driven pulley 30 (30c) and the second driven pulley 30 (30d) as only an idle pulley 50 without an eccentric shaft portion 40.

[0060] Furthermore, the timing belt 26 of the first embodiment and the timing belt 26B of the second embodiment may be a belt other than a toothed belt (cog belt), a roller chain, or the like. [Explanation of symbols]

[0061] 10... Movable platform gate 12...Door pocket 13...Cover 14…Movable fence 14m...Guide groove 20...Drive mechanism 24...Drive pulley 26...Timing belt 30...Driven pulley 40...Eccentric shaft part 42...Main body 46...Flange 48...Tool engagement part 49... Fastening bolt 50...Idle pulley 51...Inner ring 53...Outer ring 80...Drive mechanism section 90...Belt clamp 91...Clamp section 92...Bolt stopper 93...Adjustment bolt 94...Mating part 101...First adjustment mechanism 102…Second adjustment mechanism

Claims

1. A movable platform fence comprising a drive pulley and a driven pulley provided in a door pocket portion, and a timing belt wound around the drive pulley and the driven pulley, and which opens and closes a movable fence by driving the timing belt, The driven pulley is an eccentric shaft portion that is fastened to a predetermined position of the door pocket portion by a fastening bolt that is loosely inserted from the platform side and whose fastened position is changeable; an idler pulley around which the timing belt is stretched and which rotates with the eccentric shaft portion as a bearing; having Movable platform gates.

2. the idler pulley is a bearing structure having rolling elements between an inner ring portion and an outer ring portion, The eccentric shaft portion clamps the inner ring portion between the eccentric shaft portion and the door pocket portion by the fastening. The movable platform gate according to claim 1.

3. the eccentric shaft portion has a main body portion that is inserted into the inner ring portion, The inner ring portion and the main body portion are shaped to fit together. The movable platform gate according to claim 2.

4. A movable platform gate that opens and closes the movable fence by driving a timing belt whose one end is fixed to the movable fence, The movable fence is a belt clamp that clamps the one end; an adjustment bolt that is screwed into the belt clamp and whose screwing direction is a direction in which the tension of the timing belt is adjusted; having Movable platform gates.

5. The movable fence has a guide groove portion through which the timing belt passes, The belt clamp has a fitting portion that fits loosely into the guide groove portion. The movable platform gate according to claim 4.

6. The movable fence has a bolt stopper on the door tail side of the guide groove portion, The adjustment bolt is inserted from the door trailing edge side of the bolt stopper. The movable platform gate according to claim 5.

7. A movable platform fence comprising a drive pulley and a driven pulley provided in a door pocket portion, and a timing belt wound around the drive pulley and the driven pulley, and which opens and closes a movable fence by driving the timing belt, The movable fence is a belt clamp that clamps one end of the timing belt; an adjustment bolt that is screwed into the belt clamp and whose screwing direction is a direction in which the tension of the timing belt is adjusted; a first adjustment mechanism having The driven pulley is an eccentric shaft portion that is fastened to a predetermined position of the door pocket portion by a fastening bolt that is loosely inserted from the platform side and whose fastened position is changeable; an idler pulley around which the timing belt is stretched and which rotates with the eccentric shaft portion as a bearing; a second adjustment mechanism having Movable platform gates.

8. The door pocket has a removable cover on the platform side, The driven pulley is exposed so that the fastened position can be changed by removing the cover. The movable platform gate according to claim 7.

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