JP5214912B2 - Ratchet type - Google Patents

Description

  The present invention relates to an improvement of a ratchet type cargo tightening machine that smoothly performs a belt tightening operation.

  Conventionally, as shown in Patent Documents 1 and 2, a ratchet type cargo tightening machine has a winding shaft that holds the other end of the belt by rotating the handle back and forth with respect to a buckle that fixes the one end of the belt. The ratchet mechanism is configured to rotate in one direction.

  That is, basically, each of the buckle and the handle is provided with a feed dog and a detent tooth that are elastically engaged with the ratchet gear by a spring or the like, and each time the handle is rotated, the feed dog and the detent tooth are provided. Alternately meshing with the ratchet gear, while controlling the reverse rotation by meshing the detent teeth, the ratchet gear is rotated in one direction by meshing with the feed dog, and the rotation of this ratchet gear is transmitted to the winding shaft by co-rotation. And tighten the belt.

JP 2002-139105 A JP 2002-179012 A

  By the way, the cargo tightening machine shown in Patent Documents 1 and 2 has a configuration in which two ratchet gears having the same shape are stacked on each of the left and right sides of the winding shaft (for example, refer to FIGS. 1, 2, and 6 for Patent Document 1, (For Patent Document 2, see FIGS. 2 and 4). This is considered to be a two-sheet configuration that can withstand the strong tensile force that is generated at the time of loading, but if the accuracy of gear molding and assembly to the winding shaft cannot be guaranteed, handle operation during loading Is not smooth, heavy or worse. That is, when the gear molding accuracy and the assembly accuracy are poor, the gears of the two overlapping gears are mismatched, and the elastic engagement of the feed dogs and the detent teeth is rattled.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a ratchet type packing machine capable of smoothly performing a loading operation.

In order to achieve the above object, in the present invention, a gate-type handle in which a handle bar is installed between the left and right clamp plates, and a portal-type buckle in which a winding shaft at one end of the belt is installed between the left and right frame plates; A winding shaft at the other end of the belt for rotatably connecting the handle inserted through the clamp plate and the end portion of the frame plate with respect to the buckle, and the clamp plate and the A pair of left and right ratchet gears, one on each side , positioned between the end portions of the frame plate so as to be able to rotate together with the winding shaft, and elastically meshed with the ratchet gear to wind the winding shaft around the belt Ratchet type load fastening comprising: a feed dog on the handle side rotatably provided in a direction; and a detent on the buckle side provided elastically meshing with the ratchet gear to prevent reverse rotation of the ratchet gear Machine The winding shaft is composed of a pair of half-moon-shaped halves that draws a true circular rotation trajectory by dividing a shaft rod body having a perfect cross-section into two in the axial direction with a slit width corresponding to the belt thickness. The washer ring is juxtaposed with the ratchet gear between the clamp plate on the winding shaft and the end of the frame plate, and a washer ring is fixed to the frame plate by welding, and the ratchet gear and washer ring are fixed to the clamp plate. And means for sandwiching between the end portions of the frame plate . According to this means, one ratchet gear is formed on each side of the winding shaft. In other words, the conventional two-piece structure is constituted by one ratchet gear and one washer ring. The washer ring prevents the ratchet gear from rattling in the axial direction on the winding shaft and prevents the ratchet gear from twisting.

  Further, in the present invention, means is used in which the end of the clamp plate of the handle is formed into an arc at least in the rotation range of the handle, and an imaginary line connecting the tops of the ratchet gears coincides with the outer circumference of the arc. As a result, the ratchet gear is protected by the arc end portion of the clamp plate, and the top of the ratchet gear is smoothed to enable smooth handle operation.

  Further, in the present invention, means for providing a longitudinal rib on the handle clamp plate by press working is used. According to this means, the clamp plate is reinforced by the rib.

  As described above, in the present invention, the ratchet gear is one piece on each side, so that the gear does not require strict molding accuracy compared to the conventional configuration in which two identically shaped gears are stacked, and to the winding shaft. Assembling is also simple and smooth loading operation (handle operation) is possible without rattling. Further, the ratchet gear can be rotated without rattling by restricting movement in the axial direction due to the washer rings arranged side by side, and at the same time, torsional deformation can be prevented.

  Furthermore, in the present invention, since the virtual outer periphery of the ratchet gear and the outer periphery of the end of the frame plate are made to coincide with each other, the ratchet gear is concealed and protected from the outside by the end of the frame plate. Since the start-up is smooth, when the load is tightened (rotation of the winding shaft), the top of the gear is easily moved over when the feed dog and the detent tooth are elastically engaged, and the load tightening operation can be performed smoothly and lightly. it can.

  Furthermore, in the present invention, since a rib by press working is provided on the clamp plate of the handle, the clamp plate is reinforced by this rib, and inadvertent deformation such as buckling can be prevented.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing a general mechanism of this type of ratchet type cargo closing machine. That is, regarding the basic mechanism of the present invention, as shown in the figure, the handle 10 and the buckle 20 are installed, and the handle bar 12 and the winding shaft 22 are installed between the left and right clamp plates 11 and the left and right frame plates 21. The handle shaft 10 is inserted into the end portion thereof so that the handle 10 is rotatably connected to the buckle 20, and the clamp plate 11 and the frame are respectively mounted on the left and right sides of the winding shaft 30. A pair of ratchet gears 40 are provided between the ends of the plates 21 so as to be able to rotate together with the winding shaft 30. While the winding shaft 22 of the buckle 20 is fixed at one end of the belt at all times, the winding shaft 30 winds up the belt with the other end fixed. The end is detachable. Further, by providing the feed teeth 13 and the detent teeth 23 that are elastically engaged with the ratchet gear 40 by an urging force such as a spring on each of the handle side and the buckle side, the ratchet gear 40 is rotated by rotating the handle 10. The ratchet mechanism that rotates the unidirectionally is configured. In addition, since such a ratchet mechanism and its operation in the ratchet type cargo closing machine are the same as the conventional one, further details are omitted. Further, it is possible to employ a structure that can release the meshing of the feed dog 13 and the detent teeth 23 against the urging force, the details of which are conventionally known.

  Based on the premise of having the basic configuration described above, the features of the present invention will be described with reference to FIGS. 2 and 3. First, on the winding shaft 30, the ratchet gear 40 is connected to the clamp plate 11 of the handle 10. As described above, the position between the end portions of the frame plate 21 of the buckle 20 is as described above. However, in the present invention, as shown in FIG. The gear 40 and one washer ring 50 are juxtaposed. The end portions of the handle 10 and the buckle 20 are configured to be sandwiched by the clamp plate 11 of the handle 10 from the outside with the frame plate 21 of the buckle 20 inside, and on the winding shaft 30, the ratchet gear Reference numeral 40 denotes a clamp plate 11 side, and a washer ring 50 is pivotally supported to the frame plate 21 side. The washer ring 50 is fixed to the frame plate 21.

  For example, welding corresponds to the method of fixing the washer ring 50 to the frame plate 21. And this welding may also be point welding performed partially as shown by the code | symbol P of FIG. In addition, adhesion can be illustrated as another fixing method. What is necessary in the present invention is to fix the washer ring 50 so as not to play on the winding shaft 30.

  According to the first feature, the ratchet gear 40 disposed on the left and right sides of the winding shaft 30 may be one piece on each side, which can be simplified as compared with the conventional configuration of two pieces on one side. Smooth handle operation can be performed regardless of accuracy. In other words, this configuration can be rephrased as one in which one ratchet gear, which has conventionally been a two-piece configuration, is replaced by a washer ring 50, and in that respect, the one-side two-piece configuration remains unchanged. The torsional deformation is prevented as in the conventional case. In addition to this, the structure for pivotally supporting the winding shaft 30 is conventionally only the frame plate 21, whereas in the present invention, as apparent from this embodiment, the frame plate 21. In addition, since the double structure is formed by the washer ring 50 fixed to this, a shaft hole for inserting the winding shaft 30 in a rotatable manner is ensured accordingly, so that the washer ring 50 is fixed to the frame plate 21. By completely matching the central axes of the shaft holes of both 50 and 21, the winding shaft 30 can be supported more stably by the long shaft hole having the double structure, and compared with the conventional structure. The amount of wear of the insertion portion with respect to the shaft hole of the winding shaft 30 can be greatly suppressed.

The winding shaft 30 is formed by inserting a pair of halved shafts in parallel with an interval corresponding to the belt thickness, and winding the other end of the belt with the interval as an insertion slit. As clearly shown in FIG. 3, the special feature of this embodiment is that a shaft rod having a perfectly circular cross section is divided into two by the slit width in the axial direction, and the winding shaft 30 is divided by a half-shaft having a semicircular cross section. It is in the point which constituted. Correspondingly, the ratchet gear 40 is formed with a pair of half-moon shaped shaft holes through which the half shaft can be inserted at symmetrical positions of the central axis. A perfect circular shaft hole through which the winding shaft 30 is rotatably inserted is formed on the end portion and the end portion of the frame plate 21 of the buckle 20 on the same axis. According to the said structure, the rotation locus | trajectory of the whole winding axis | shaft 30 draws a perfect circle in the state which both rotation axes (center axis) corresponded completely by inserting the said half-moon-shaped half axis into the symmetrical position. Therefore, when the winding shaft 30 is rotated by the ratchet operation, there is no rattling or blurring, and the belt can be wound up stably. Further, since rattling or blurring does not occur during winding, inadvertent wear of the winding shaft 30 and its shaft hole is prevented. In this regard, the conventional product has a half-shaft that is not based on a perfect circle, so there is a lot of rattling of the winding shaft during winding, and the winding shaft and its shaft hole are heavily worn.

Next, the second feature is that, as shown in FIG. 3 , an arc portion 11 a is formed on the outer periphery of the end portion of the clamp plate 11 of the handle 10. The formation range of the arc portion 11 a is the rotation range of the handle 10. At the same time, the ratchet gear 40 has a virtual outer circumferential line L connecting the tops thereof coincided with the outer circumferential line of the arc portion 11a. Thereby, the ratchet gear 40 is concealed inside with the clamp plate 11 as a side frame, and the ratchet gear 40 is protected by the end portion of the clamp plate 11, and foreign matter can be prevented from being caught in the ratchet gear 40. Further, by matching the outer peripheral lines, the gear of the ratchet gear 40 is naturally set in a shape that draws a gentle curve at the top, so that the feed dog 13 and the detent that accompany the rotation of the ratchet gear 40 during loading The tooth 23 can be smoothly passed over the gears, and the steering wheel can be operated smoothly and lightly.

  Subsequently, the third feature relates to the reinforcement of the handle 10, and as is apparent from FIGS. 2 and 3, the clamp plate 11 is provided with a longitudinal rib 60 by pressing. In other words, the clamp plate 11 of the handle 10 is compared with the frame plate 21 of the buckle 20 in order to rotate and avoid interference with the ratchet mechanism, and to reduce the turning force with the handle bar 12 as a power point. However, it is vulnerable to external force and may cause inadvertent deformation such as buckling. Therefore, in the present invention, the clamp plate 11 is reinforced by providing the rib 60.

Perspective view showing the general structure of a ratchet type packing machine The top view which showed the ratchet type locking machine which concerns on this invention Same side view

Explanation of symbols

10 Handle 20 Buckle 30 Winding shaft 40 Ratchet gear 50 Washer ring 60 Rib

Claims (3)

A gate-type handle with a handlebar laid between the left and right clamp plates, a gate-type buckle with a belt end clamped between the left and right frame plates, and ends of the clamp plate and the frame plate A winding shaft at the other end of the belt for connecting the handle inserted into the buckle so as to be rotatable relative to the buckle, and positioned between the ends of the clamp plate and the frame plate on the winding shaft. A pair of left and right ratchet gears, one on each side provided so as to be able to rotate together with the winding shaft, and elastically meshing with the ratchet gear so that the winding shaft can be rotated in the winding direction of the belt. A ratchet type load-carrying machine comprising a feed dog and a buckle-side detent gear that is elastically meshed with the ratchet gear so as to prevent reverse rotation of the ratchet gear. The shaft of the circle The slit width corresponding to the thickness is divided into two in the axial direction, and is constituted by a pair of half-moon-shaped halved shafts so as to draw a rotation path of a perfect circle, and the clamp plate on the winding shaft and the The washer ring is juxtaposed with the ratchet gear between the end portions of the frame plate, and the washer ring is fixed to the frame plate by welding, and the ratchet gear and the washer ring are sandwiched between the end portions of the clamp plate and the frame plate. A ratchet type packing machine.   The ratchet type load-clamping machine according to claim 1, wherein an end of the clamp plate of the handle is formed into an arc at least in a rotation range of the handle, and an imaginary line connecting the tops of the ratchet gears is made to coincide with the outer peripheral line of the arc.   The ratchet type tightening machine according to claim 1 or 2, wherein a rib in the longitudinal direction is provided on a clamp plate of the handle by pressing.

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