JP4085390B2 - Rotation lock device - Google Patents

Description

  The present invention relates to a rotation lock device, and more specifically to a rotation lock device capable of automatically locking at a specific rotation position.

For example, if the rear door of the truck bed is moved by wind or inclination during loading / unloading of the load, the operation is hindered, and therefore it is necessary to lock the rotation at a predetermined angle. As a countermeasure, for example, the following publication discloses a door angle regulating device.
Japanese Utility Model Publication No. 7-21968

  In the conventional rotation position regulating device as described above, there is a problem that the structure is complicated, it takes time to process parts, and a device is also required on the door side. An object of the present invention is to solve the above-described problems.

  The rotation lock device according to the present invention includes a shaft member having an axial groove in a first predetermined range, the second predetermined range having a smaller diameter than the first predetermined range, and the shaft One fixing member that supports the member so as not to rotate and is slidable in the axial direction within a predetermined range, and is fixed to the other fixing member, and is rotatably supported by engaging with the shaft member. And a cylindrical member provided with a protrusion capable of engaging with the groove inside.

A rotation lock device according to another embodiment of the present invention includes a shaft member and a support plate that is perpendicular to the shaft member and is provided with a locking hole , and does not rotate the shaft member. And a fixing member that is slidably supported in the axial direction within a predetermined range, and a reinforcing plate that is fixed to the other fixing member and is perpendicular to the shaft member and provided with a locking hole. , inserted a cylindrical member rotatably supported by engaging the shaft member, in conjunction with the shaft member, to the hole when the hole and the position of the reinforcing plate of holes of the support plate matches and Lupi emissions is, the pin is characterized by comprising a spring means for urging said shaft member in a direction to be inserted into the hole.

  The rotation lock device of the present invention has a simple structure, a small number of parts, and is easy to manufacture. In addition, the function of restricting the rotational position is realized only by the rotational lock device, and the shape can be realized with almost the same size as the existing hinge, so that it can be replaced with the existing hinge. Furthermore, the angle for locking the rotation can be arbitrarily set at the time of manufacture.

  As an embodiment, an example in which the present invention is applied to a rotation lock device for a rear door of a truck bed will be disclosed. However, the rotation lock device of the present invention can be used as a rotation lock device for any device or device that wants to lock the rotation at a predetermined angle.

  FIG. 1 is a plan view showing a lock angle of a rear door of a truck using the rotation lock device of the present invention. Rear doors 13 and 14 are fixed to a side wall 11 on the side surface of the truck bed 10 so as to be rotatable by a rotation lock device 12 of the present invention and a plurality of ordinary hinges. A normal door can be rotated continuously from 0 degree to 270 degrees, but by using the rotation lock device of the present invention, for example, as shown in the figure, it can be rotated at 0 degree, 90 degrees, 180 degrees, and 270 degrees. The rotation can be locked at four locations. It can be turned by manually releasing the lock, and automatically locks when it reaches the other lock position. As will be described later, the lock angle can be arbitrarily set when the rotation lock device is manufactured.

  FIG. 2 is a plan view showing the configuration of the rotation lock device of the present invention. There are three main parts constituting the rotation lock device. The first fixing member 20 is a member that fixes the rotation lock device 12 to the side wall 11 of the loading platform. The second fixing member 25 is a member that fixes the rotation lock device 12 to the door 14. The shaft member 26 rotatably connects the first fixing member 20 and the second fixing member 25. The cover member 23 serves to protect the internal components, and also to hold the lock release lever 24 fixed to the shaft member 26 at the release position, and is fixed to the first fixing member 20.

  FIG. 3 is a plan view and a side view showing the configuration of one fixing member of the rotation lock device of the present invention. As shown in the figure, one fixing member 20 has two supporting plates 21 and 22 that support a shaft fixed at right angles to a base metal plate provided with screw holes. The hole 34 that supports the shaft of the one support plate 22 to which the cover member 23 is fixed has a smaller diameter than the hole 3 that supports the shaft of the other support plate 21. Are provided with two protrusions 33 and 35 for restricting the rotation of the shaft.

FIG. 4 is a plan view and a side view showing the configuration of the other fixing member of the rotation lock device of the present invention. The other fixing member 25 includes a cylindrical member 40 serving as a bearing and a door fixing plate 25 fixed to the cylindrical member by welding or the like, and is reinforced by two reinforcing plates 42 fixed by welding or the like.
Inside the cylindrical member 40, a projection 41 having a predetermined height is provided at a predetermined position in the axial direction, for example, about one third of the shaft length below the center. In this embodiment, a part of the door fixing plate 25 is protruded through a hole provided in the cylindrical member 40.

  FIG. 5 is a plan view and a cross-sectional view showing the configuration of the shaft member of the rotation lock device of the present invention. The shaft member 26 includes a shaft main body, a stopper 50, and a screw 51 for fixing the stopper 50 to the shaft main body. Although not shown in FIG. 5, the lock release lever 24 (61) is fixed to the lower portion with a screw (62).

  The shaft body is composed of an upper portion with a large diameter having a length substantially equal to the length of the cylindrical member of FIG. 4 and a lower portion with a small diameter. On the side surface of the thick part of the shaft, two grooves 52 for restricting the rotation of the shaft that engage with the protrusions 33 of the support plate 21 are provided. Further, below the center of the thick portion, there are provided rotation locking grooves 53 and 54 that engage with the projection 41 of the other fixing member 25.

  The protrusions 33 and 41 and the grooves 52 and 53 and 54 have the same cross section, and the groove 52 also serves as a locking groove with which the protrusion 41 engages. The four grooves are arranged so that an angle from the center of two adjacent grooves is 90 degrees (a position obtained by dividing the circumference into four equal parts). Two grooves 55 that engage with the protrusions 35 of the support plate 22 are provided in a portion having a small diameter. The diameter of the thin portion is selected so as not to engage with the protrusion 41, but it may not be the same as the diameter of the bottom of the groove of the thick portion.

  FIG. 6 is a cross-sectional view showing the configuration of the rotation lock device of the present invention when locked and unlocked. The left side of FIG. 6 is a sectional view showing the rotation lock device in the rotation lock state. In the locked state, the shaft member 26 is biased downward by a coil spring 60 in the cover member 23, and the stopper 50 and the support member 21 are in contact with each other.

  The protrusion 41 of the other fixing member 25 is engaged with one of the locking grooves of the shaft member, and the shaft member 26 is engaged with the protrusion of the support members 21 and 22. The rotation is locked and does not rotate.

  The right side of FIG. 6 is a cross-sectional view showing the rotation lock device in the rotation lock release state. When the operator manually pushes up the lock release lever 24 against the coil spring 60, the shaft member 26 is pushed up to the position shown in the figure, and the protrusion 41 of the other fixing member 25 is a groove for locking the shaft member. And the other fixing member 25 can freely rotate.

  Even if the operator releases the lock release lever 24 while the door is slightly rotated, the end of the shaft member is in contact with the end of the protrusion 41 but the rotation is possible. When the operator further rotates the door to the adjacent lock position, the shaft member 26 is automatically lowered to the lock position on the left in FIG. 6 by the coil spring 60, and the protrusion 41 is for locking the shaft member 26. Engaging with one of the grooves and locking the rotation.

  When it is desired to keep the unlocked state, the operator pushes up the unlocking lever 24 and rotates it to the left or right, so that the lever 24 engages with the notch 31 and keeps the state. The door can be freely rotated.

  FIG. 7 is a cross-sectional view showing a configuration of a modified example of the embodiment. FIG. 7A shows the configuration of the first embodiment described above. In the case of the first embodiment, since there is one protrusion 41, the rotation lock position (angle) is determined by the position of the locking groove provided in the shaft member 26. And the position and number of grooves are arbitrary as shown in the sectional view of the shaft in FIG.

  FIG. 7B is an example in which a plurality (four) of protrusions 70 are provided in the cylindrical member 40. The shaft member 26 may be the same as that of the first embodiment. The protrusion 41 needs to be strong enough not to be deformed with respect to the rotational moment of the door due to wind or the like. However, by providing a plurality of protrusions, the thickness of each protrusion and the length in the axial direction can be reduced. It becomes possible. Therefore, the moving distance of the shaft member 26 when releasing the lock can be shortened.

  In addition, although the example of (b) is an example in which a protrusion is provided at a position where the circumference is divided into four equal parts, as shown in FIGS. A configuration in which the protrusion is provided at a position equally divided into a number is possible. Further, the number of protrusions may be four and the number of grooves of the shaft member 26 may be eight (the circumference is divided into eight equal parts). In this case, the shaft member 26 is locked every 45 degrees.

  FIG. 8 is a cross-sectional view showing the configuration of the second embodiment. In the first embodiment, the shaft member also serves as the shaft of the rotation lock device. For example, when a force is applied in a direction perpendicular to the shaft such as a door load, the shaft member 26 can be smoothly moved up and down. There is a risk of disappearing. The second embodiment is characterized in that the shaft function and the lock function are separated.

  The second embodiment is different from the first embodiment in that the support members 21 and 22 are provided with cylindrical ribs 80 and 81 and engaged with both ends of the cylindrical member 40 so as to perform the shaft function. This is the point. By adopting such a structure, an extra force is not applied to the shaft member 26, and the vertical movement can be performed smoothly.

  FIG. 9 is a plan view showing the lock angle of the rear door of the truck using the rotation lock device of the third embodiment of the present invention. In the third embodiment, the lock angle is 90 degrees and 270 degrees (actually, 90 degrees is slightly larger than 90 degrees and slightly smaller than 270 degrees). An external lock mechanism works with the mechanism to increase the lock strength. Further, when locked, the shaft protrudes upward and is released by pushing down the shaft.

  The rear doors 13 and 14 are fixed to the side wall 11 on the rear surface of the truck bed 10 so as to be rotatable by the rotation lock device 112 of the third embodiment and a plurality of ordinary hinges. The normal door can be rotated continuously from 0 to 270 degrees, but by using the rotation lock device of the present invention, the rotation is locked at two positions of 90 degrees and 270 degrees as shown in the figure. Is possible. It can be turned by manually releasing the lock, and automatically locks again when it is turned to another lock position.

  FIG. 10 is a plan view showing the configuration of the rotation lock device of the third embodiment of the present invention. There are three main parts constituting the rotation lock device. The first fixing member 120 is a member that fixes the rotation lock device 112 to the side wall 11 of the loading platform. The second fixing member 125 is a member that fixes the rotation lock device 12 to the door 14. The shaft member 126 rotatably connects the first fixing member 120 and the second fixing member 125.

  FIG. 11 is a plan view and a side view showing the configuration of one fixing member of the rotation lock device of the third embodiment of the present invention. As shown in the figure, one fixing member 120 has two support plates 121 and 122 that support a shaft fixed at right angles to a base metal plate provided with screw holes. The hole 134 that supports the shaft of the lower support plate 122 has a smaller diameter than the hole 132 that supports the shaft of the upper support plate 121, and the holes 132 and 134 restrict the rotation of the shaft 2. Two protrusions 133 or flat portions 135 are provided. The lower support plate 122 is provided with a hole 136 used by an external lock mechanism.

  12A and 12B are a plan view and a side view showing components of the external lock mechanism of the rotation lock device according to the third embodiment of the present invention. The pin 139 of the external lock mechanism has a cylindrical shape with a rounded tip, and is fixed to a substantially egg-shaped holding plate 137 by welding or the like. The holding plate 137 is provided with a hole 138 for fixing to the shaft with a screw.

  FIG. 13 is a plan view and a side view showing the configuration of the other fixing member of the rotation lock device of the third embodiment of the present invention. The other fixing member 125 includes a cylindrical member 140 serving as a bearing and a door fixing plate 125 fixed to the cylindrical member by welding or the like, and is reinforced by two reinforcing plates 142 and 143 fixed by welding or the like. Yes. The lower reinforcing plate 143 is provided with a hole 144 used by the external lock mechanism.

  Inside the cylindrical member 140, a protrusion 141 having a predetermined height is provided at a predetermined position in the axial direction, for example, in the vicinity of the center and having a length of about a quarter of the shaft. In this embodiment, a part of the door fixing plate 125 is protruded through a hole provided in the cylindrical member 140.

  FIG. 14 is a plan view and a cross-sectional view showing the configuration of the shaft member of the rotation lock device of the third embodiment of the present invention. The shaft member 126 includes a shaft main body, a stopper 150, and a screw 151 for fixing the stopper 150 to the shaft main body. Although not shown in FIG. 14, a holding plate 137 shown in FIG. 12 serving as an external lock mechanism is fixed to the lower portion with a screw.

  The shaft body has four portions 152, 153, 154, and 155 having different cross sections shown on the right side of FIG. The uppermost portion 152 has a cylindrical shape having an outer diameter slightly smaller than that of the cylindrical member 140 serving as a bearing, and is engaged with two protrusions 133 that restrict rotation provided in the hole 132 that supports the shaft of the upper support plate 121. Two grooves 156 are formed. The second stage 153 has a thin cylindrical shape, and the diameter is set to a length that does not engage with the protrusion 141.

  The third stage 154 has a cylindrical shape with the same diameter as that of the uppermost part 152, and is provided with two grooves 157 and 158 that engage with the protrusion 141. Since the rotation lock device locks at the position of the groove 157, the position of the protrusion 133 is determined so that the grooves 157 and 158 are positioned at 90 degrees and 270 degrees from the position of the protrusion 141 when the door is closed, Arrange the axes. In order to insert the shaft from the hole 132, the width and depth of the grooves 157 and 158 are the same as or larger than the groove 156.

  In this embodiment, the 90-degree groove 157 is slightly narrower than the 270-degree groove 158 and functions in cooperation with the external lock mechanism to minimize the rattling of the door. To do. The groove 158 has a wide groove width (play), assuming that a protrusion or the like is mounted on the outer surface of the door.

  In addition, when using the rotation lock apparatus of this invention for a side door, it is necessary to lock at 90 degree | times and 180 degree | times, In this case, the groove | channel 170 shown by the dotted line in FIG. 14 is provided. The groove 170 has the same shape as the groove 157. The groove 158 may be present.

  The lowermost part 155 has a thin cylindrical shape and is provided with an opposing flat part 159 that engages with the flat part 135 of the support plate for restricting rotation. A coil spring (160) is mounted between the lowermost step 155 and the cylindrical member 140.

  FIG. 15 is a cross-sectional view showing a configuration at the time of locking and unlocking of the rotation lock device of the third embodiment of the present invention. FIGS. 15A and 15B are a longitudinal sectional view and a transverse sectional view showing the rotation locking device in the rotation unlocking state. In the unlocked state, the shaft 126 is pressed upward by the coil spring 160, but protrudes because the third-stage cylindrical upper surface of the shaft 126 is in contact with the lower surface of the protrusion 141 of the cylindrical member 140. There is no. Further, since the protrusion 141 is not fitted into the groove and the pin 139 of the external lock mechanism fixed to the shaft 126 does not protrude, the rotation lock device is in a rotatable state.

  15C and 15D are cross-sectional views showing the rotation lock device in the rotation lock state (90 degrees). When the operator opens the door close to 90 degrees, the protrusion 141 rotates to the position of the groove 157 of the shaft 126, so that the engagement between the protrusion 141 and the shaft 154 is released and the shaft 126 is moved upward by the coil spring 160. Protrusively. Then, since the protrusion 141 engages with the groove 157 and the pin 139 also protrudes and engages with the hole 144, the door is locked and the rotation is restricted. In the case of 90 degrees, the pin 139 which is an external lock mechanism can provide a sufficient strength against a large moment caused by a strong wind.

  When releasing the lock, when the operator pushes down the protruding shaft 126 and then rotates the door in an arbitrary direction, the protrusion 141 and the shaft 154 are engaged with each other so that the operator can rotate again. . At the position of 270 degrees, the shaft 126 and the pin 139 protrude with locking, but since there is no hole 144 at this position, the external locking mechanism does not work. However, since the door is close to the loading platform at a position of 270 degrees and a large moment is not applied to the rotation lock device by the strong wind, the strength is sufficient only by the internal locking mechanism.

  Although the third embodiment has been disclosed above, a configuration in which the shaft function and the lock function are separated can also be considered in the third embodiment. In this case, a configuration similar to that of the second embodiment as shown in FIG. It can be adopted.

  FIG. 16: is sectional drawing which shows the structure at the time of the lock of the rotation lock apparatus of 4th Example of this invention at the time of lock release. The fourth embodiment is a modification of the third embodiment, and the fourth embodiment is different from the third embodiment in that the external lock mechanism operates even at a position of 270 degrees by changing the shape of the reinforcing plate 170. In the unlocked state, the head of the pin 173 and the reinforcing plate 170 are in contact with each other, the protrusion 141 and the shaft 154 are not in contact, and the bottom 174 of the pin 173 is like the head of a screw. It is the point which increased the strength as a simple shape.

  FIGS. 16A and 16B are a longitudinal sectional view and a transverse sectional view showing the rotation lock device in the rotation unlock state. In the unlocked state, the shaft 126 is pressed upward by the coil spring 160, but does not protrude because the head of the pin 173 and the reinforcing plate 170 are in contact. Further, since the protrusion 141 is not fitted in the groove and the pin 173 of the external lock mechanism does not protrude, the rotation lock device is in a rotatable state.

  FIGS. 16C and 16D are cross-sectional views showing the rotation lock device in the rotation lock state (90 degrees). When the operator opens the door to nearly 90 degrees, the hole 171 of the reinforcing plate 170 rotates to the position of the pin 173, so that the engagement between the pin 173 and the reinforcing plate 170 is released, and the shaft 126 is rotated by the coil spring 160. Projecting to the top. Then, since the protrusion 141 engages with the groove 157 and the pin 173 protrudes and engages with the hole 171, the door is locked and the rotation is restricted.

  FIG. 16E is a cross-sectional view showing the rotation lock device in the rotation lock state (270 degrees). When releasing the lock, if the operator depresses the protruding shaft 126 and then rotates the door in an arbitrary direction, the head of the pin 173 and the reinforcing plate 170 are engaged to rotate again. It becomes a state. At the position of 270 degrees, the shaft 126 and the pin 173 protrude again after being locked, but a notch 172 is provided at this position of the reinforcing plate 170 instead of the hole, and the notch 172 and the pin 173 are engaged. Match. In addition, you may change the shape of the reinforcement board 170 and provide a hole instead of a notch.

  In the fourth embodiment, since the head of the pin 173 and the reinforcing plate 170 are in contact with each other, the longitudinal section of the head of the pin 173 has a shape that is easy to slide, such as a circle, an ellipse, or a trapezoid with rounded corners. Further, a metal ball may be embedded in the head of the pin so as to be rotatable.

  Although the fourth embodiment has been disclosed above, a configuration in which the shaft function and the lock function are separated can also be considered in the fourth embodiment. In this case, a configuration similar to the second embodiment as shown in FIG. It can be adopted.

  FIG. 17 is a cross-sectional view showing a configuration at the time of locking and unlocking of the rotation lock device of the fifth embodiment of the present invention. The fifth embodiment is a modification of the fourth embodiment. The fifth embodiment is different from the fourth embodiment in that the protrusion 141 of the internal lock mechanism and the shaft groove 157 are omitted and only the external lock mechanism is used. Is a point. The shaft 180 of the fifth embodiment is thin at the bottom to accommodate the spring 160 but has no groove 157. The groove 156 for restricting the rotation of the pin may be provided, but may not be provided because the pin 173 is engaged with the hole 136 of the support plate 122.

  FIG. 18 is a cross-sectional view showing a configuration at the time of locking and unlocking of the rotation lock device of the sixth embodiment of the present invention. The sixth embodiment is a modification of the fifth embodiment, and the sixth embodiment is different from the fifth embodiment in that an existing hinge part is processed and used as the cylindrical member 190. When the configuration of the fifth embodiment shown in FIG. 17 using the existing hinge part is used, it is necessary to cut the shaft 180 in order to accommodate the spring 160, and there is a problem that the shaft becomes too thin. Therefore, the upper inner surface of the existing cylindrical member 190 of the hinge is shaved, and the spring 160 is housed in the portion where the inner diameter is increased by shaving. By adopting such a configuration, it is possible to employ a shaft 191 that is thicker than the fifth embodiment when an existing hinge part is used. In addition, the existing cylindrical member 190 of the hinge and the door fixing plate 125 are integrally formed, and the reinforcing plates 142 and 143 are newly fixed by welding.

  FIG. 19 is a cross-sectional view showing a configuration at the time of locking and unlocking of the rotation lock device of the seventh embodiment of the present invention. The seventh embodiment is a modification of the fifth embodiment, and the seventh embodiment is different from the fifth embodiment in that an external lock mechanism is also provided on the upper portion. The upper pin 202 is connected to one end of the leaf spring member 200, and the other end of the leaf spring member 200 is connected to the upper portion of the shaft 180 by a screw 302. The fulcrum 201 supports the leaf spring member 200 in a swingable manner.

  FIG. 9A shows the unlocked state, and the upper pin 202 is supported at a position pulled up by the leaf spring member 200. FIG. 9B shows a locked state. When the shaft 180 rises, the upper pin 202 is pushed down by the leaf spring member 200 and passes through the holes 205 provided in the upper support plate 121 and the reinforcement plate 204. The rotation lock device is locked. A configuration in which the leaf spring member 200 is a normal metal plate is also possible.

  By adding such an upper locking mechanism, the strength is further increased. The upper external lock mechanism of the seventh embodiment can be used in combination with the configuration of any other embodiment.

  Next, an eighth embodiment will be described. The eighth embodiment is a modification of the fifth embodiment described above, and is locked only by an external lock mechanism as in the fifth embodiment. The eighth embodiment differs from the fifth embodiment in that an attachment plate 341 for providing play is added between the other fixing member 325 (door fixing plate 325) and the door 14, and an upper support plate 321. In addition, a point provided with a hole 333 for manually locking, a point where the fixing method between the pin 339 and the holding plate 337 is screwed, and a hole in the upper support plate 321 for preventing the shaft member 326 from rotating. The point 332 is omitted, and the corresponding groove of the shaft member is also omitted. The following description will focus on the changes.

  FIG. 20 is a plan view and a side view showing the configuration of one fixing member 320 of the rotation lock device of the eighth embodiment of the present invention. The hole 332 that supports the shaft of the upper support plate 321 has no protrusion that restricts the rotation of the shaft. The shaft 326 is engaged with the flat portion of the hole 334 of the lower support plate 322 and its rotation is restricted. The upper support plate 321 is also provided with a hole 333 for manual locking.

  21A and 21B are a plan view and a side view showing components of the external lock mechanism of the rotation lock device of the eighth embodiment of the present invention. As the pin 339, an existing hexagonal wrench bolt whose tip is polished in a hemispherical shape is used, and a screw thread is cut into a hole of the holding plate 337 and screwed. By using bolts, the necessary materials can be selected and exchanged.

  FIG. 22 is a plan view and a side view showing the configuration of the other fixing member 325 of the rotation lock device of the eighth embodiment of the present invention. In addition, the cross section of the added mounting plate 341 is also disclosed. FIG. 24 is a plan view and a side view showing the configuration of the mounting plate 341. The hole 344 and the notch 345 forming the locking mechanism are provided in the upper reinforcing plate 342 together with the lower reinforcing plate 343.

  A flanged nut 347 is fixed to the mounting plate 325 with a bolt 346. The mounting plate 341 is provided with a hole 349 for attachment to the door and an oblong hole 348 that engages with the flanged nut 347, and the oblong hole 348 engages with the flanged nut 347 with play. ing. Therefore, the relative positions of the door mounting plate 325 and the mounting plate 341 can be moved by a predetermined amount.

  For example, when the rotation lock device of the present invention is added to an existing track and attached, in the case of the first to seventh embodiments, the rotation of the rotation lock device must be aligned with other hinges accurately. There is a problem that force is applied to the shaft of the dynamic lock device and the shaft cannot move up and down. In this embodiment, in order to prevent a force from being applied to the shaft of the rotation lock device even if the shaft of the rotation lock device does not exactly coincide with the other hinges, the mounting plate 341 having play is used. This problem is solved by connecting to the door.

  FIG. 23 is a plan view and a cross-sectional view showing the configuration of the shaft member 326 of the rotation lock device of the eighth embodiment of the present invention. The shaft body has two portions 352 and 355 having different cross sections as shown on the right side of FIG. The upper part 352 has a cylindrical shape having an outer diameter slightly smaller than that of the cylindrical member 340 serving as a bearing. The lower portion 355 has a thin cylindrical shape and includes an opposing flat portion 359 that engages with a flat portion of a support plate for restricting rotation. A coil spring (360) is mounted between the lower stage 355 and the cylindrical member 340.

  FIG. 25 is a cross-sectional view showing a configuration at the time of locking and unlocking of the rotation lock device of the eighth embodiment of the present invention. Since the hole 333 and the hole 344 are provided, the strength at the time of locking can be increased by manually inserting a pin into the hole in a strong wind or the like.

  FIG. 26 is a cross-sectional view showing a configuration at the time of locking and unlocking of the rotation lock device of the ninth embodiment of the present invention. The ninth embodiment is a modification of the eighth embodiment. The ninth embodiment is different from the eighth embodiment in that the locked state is obtained when the door is rotated with a predetermined strength or more in the locked state. The point is that it is automatically canceled. FIG. 26A shows the unlocked state, and FIG. 26B shows the locked state. In the locked state, when the shaft 326 is raised, the pin-shaped hemisphere or the curved head portion 381 approximated to a hemisphere is brought into contact with the inclined side surface of the conical hole 382 provided in the reinforcing plate 343. ing.

  In this state, the rotation is temporarily locked, but when the door is rotated with a strength higher than a predetermined level, the hemispherical head 381 of the pin slides on the inclined side surface of the conical hole 382, The pin is pushed down to enter the unlocked state (a), and the lock is automatically released. In the case of a strong wind or the like, the pin 383 can be manually inserted into the holes 333 and 344 so that it can be reliably locked.

  FIG. 27 is a cross-sectional view showing the configuration of the rotation lock device of the tenth embodiment of the present invention. The tenth embodiment is obtained by adding an unlocking plate to the first to ninth embodiments. Fig.27 (a) is a side view which shows the example which attached the unlocking plate with the rotation lock apparatus of this invention to the side wall 11 of the loading platform. FIG. 27A is a plan view showing the configuration of the unlocking plate. This unlocking plate is for enabling the lock to be released with an elbow or the like even when holding a load with both hands. A substantially trapezoidal plate 385 is connected to the fixing plate 386 via a hinge 387. This unlocking plate is secured to the upper part of the rotation lock device by screws 388 as shown.

  FIG. 28 is a cross-sectional view showing the configuration of the rotation lock device of the eleventh embodiment of the present invention. The eleventh embodiment is obtained by adding a lock releasing lever 400 to the first to ninth embodiments. This unlocking lever 400 is for releasing the lock from the end of the door 14. The lever 400 is fixed to the door 14 so as to be rotatable by a shaft 403. The support bracket 402 supports the lever 400 so that the lever 400 can rotate only within a predetermined range. A grip 401 is provided on the end side of the door 14 of the lever 400, and the other end is the head of the shaft 326 of the rotation lock device. It is in contact with the part. By raising the grip portion 401 upward, the head of the shaft 326 is pushed down, and the lock is released.

  FIG. 29 is a cross-sectional view showing the configuration of the rotation lock device of the twelfth embodiment of the present invention. The twelfth embodiment is obtained by adding an unlocking drive device 410 to the first to ninth embodiments. The unlocking driving device includes, for example, an electric actuator 410 using an electromagnet or a motor and a gear mechanism, a push button switch 411 and a switch 411 provided at the end of the door 14, an electric actuator 410, and a car battery 412. It consists of an electric wire 413 to be connected. When the switch 411 is turned on, the electric actuator 410 is driven, and the lock is released by depressing the head of the shaft 326 of the rotation lock device. By turning off the switch, the electric actuator 410 returns to its original state. Instead of the electric actuator, a piston driving device and an electromagnetic valve that operate by air pressure or hydraulic pressure may be used.

The thirteenth embodiment is a modification of the rotation lock device according to the eighth embodiment of the present invention. Instead of the shaft member 326 in the eighth embodiment, a cylindrical cylindrical shaft member functioning as a shaft includes a locking member. This is provided with a rod-like member which is fixed to the pin and can freely slide up and down.
FIG. 30 is a plan view and a side view showing the configuration of one fixing member 320 of the rotation lock device of the thirteenth embodiment of the present invention. In the thirteenth embodiment, the upper support plate 321 and the lower support plate 322 have the same shape, and the circular holes 332 and 534 that support the cylindrical shaft member have no protrusions that restrict the rotation of the cylindrical shaft member. . However, since the pin is engaged with the hole 336, the pin does not rotate.

  FIG. 31 is a sectional view showing the structure of the shaft device of the rotation lock device of the thirteenth embodiment of the present invention. The shaft device is mainly composed of three parts: a cylindrical shaft member 500, rod-shaped members (503 and 504), and a coil spring 505. The cylindrical shaft member 500 is a cylindrical member having the same outer diameter as the shaft shown in FIG. 23, and a flange 501 is provided at the upper part. A stepped portion 502 having an inner diameter smaller than that of the coil spring 505 and larger than that of the rod-shaped member is formed in a predetermined range inside the cylinder. The step portion 502 is formed by inserting and welding a small diameter cylinder into the metal cylinder (500). The cylindrical member 506 inserted in the lower portion of the spring 505 is a component for adjusting the strength of the spring by changing the length of this member, but may not be necessary.

  The internal bar-shaped member is composed of a metal bar-shaped member 503 having a thread cut at both ends and a cylindrical member 504 having one end closed, a flange, and a thread cut inside. . A cylindrical member 504 is fixed to the rod-shaped member 503 once with a screw. Note that the rod-shaped member 503 and the cylindrical member 504 may be integrally formed.

  A holding plate 510 is fixed to the other end (lower part) of the rod-shaped member 503 by a nut 508. A nut 511 is fixed to the holding plate 510 by welding, and a hexagonal wrench bolt 512 having a pin 513 whose tip is polished in a hemispherical shape is fixed to the nut. Reference numeral 514 denotes a spring washer.

  FIG. 32 is a cross-sectional view showing a configuration at the time of locking and unlocking of the rotation lock device of the thirteenth embodiment of the present invention. FIG. 32A is a cross-sectional view showing the state when the lock is released. Since the pin 513 is in contact with the reinforcing plate 343, the bar-like member 503 holds the pressed position.

FIG. 32A is a cross-sectional view showing a state when locked. When the door is rotated and the hole 344 reaches the position of the pin 513, the pin 513 and the rod-like member 503 fixed to the pin are moved upward by the spring 505 and locked. At this time, since the cylindrical shaft member 500 penetrating through the hole of the support plate 321 receives the external force from the door mounting plate 325 as an axis, the internal rod-shaped member 503 can freely slide. The lock is released when the user presses the cylindrical member 504 fixed to the end of the rod-like member 503.

It is a top view which shows the lock angle of the rear door of the truck which uses the rotation lock apparatus of this invention. It is a top view which shows the structure of the rotation lock apparatus of this invention. It is the top view and side view which show the structure of one adhering member of the rotation lock apparatus of this invention. It is the top view and side view which show the structure of the other adhering member of the rotation lock apparatus of this invention. It is the top view and sectional drawing which show the structure of the shaft member of the rotation lock apparatus of this invention. It is sectional drawing which shows the structure at the time of the locking of the rotation locking device of this invention, and a lock release. It is sectional drawing which shows the structure of the modification of an Example. It is sectional drawing which shows the structure of 2nd Example. It is a top view which shows the lock angle of the rear door of the truck which uses the rotation lock apparatus of 3rd Example of this invention. It is a top view which shows the structure of the rotation lock apparatus of 3rd Example of this invention. It is the top view and side view which show the structure of one adhering member of the rotation lock apparatus of 3rd Example of this invention. It is the top view and side view which show the components of the external lock mechanism of the rotation lock apparatus of 3rd Example of this invention. It is the top view and side view which show the structure of the other adhering member of the rotation lock apparatus of 3rd Example of this invention. It is the top view and sectional drawing which show the structure of the shaft member of the rotation lock apparatus of 3rd Example of this invention. It is sectional drawing which shows the structure at the time of the lock | rock of the rotation locking device of 3rd Example of this invention at the time of lock release. It is sectional drawing which shows the structure at the time of the lock of the rotation locking device of 4th Example of this invention at the time of lock release. It is sectional drawing which shows the structure at the time of the lock of the rotation lock apparatus of 5th Example of this invention at the time of lock release. It is sectional drawing which shows the structure at the time of the lock of the rotation locking device of 6th Example of this invention at the time of lock release. It is sectional drawing which shows the structure at the time of the lock of the rotation lock apparatus of 7th Example of this invention at the time of lock release. It is the top view and side view which show the structure of one fixing member 320 of the rotation lock apparatus of 8th Example of this invention. It is the top view and side view which show the components of the external lock mechanism of the rotation lock apparatus of 8th Example of this invention. It is the top view and side view which show the structure of the other adhering member 325 of the rotation lock apparatus of 8th Example of this invention. It is the top view and sectional drawing which show the structure of the shaft member 326 of the rotation lock apparatus of 8th Example of this invention. It is the top view and side view which show the structure of the mounting plate 341. It is sectional drawing which shows the structure at the time of lock of the rotation locking device of 8th Example of this invention at the time of lock release. It is sectional drawing which shows the structure at the time of the lock of the rotation lock apparatus of 9th Example of this invention at the time of lock release. It is sectional drawing which shows the structure of the rotation lock apparatus of 10th Example of this invention. It is sectional drawing which shows the structure of the rotation lock apparatus of 11th Example of this invention. It is sectional drawing which shows the structure of the rotation lock apparatus of 12th Example of this invention. It is the top view and side view which show the structure of one fixing member 320 of the rotation lock apparatus of 13th Example of this invention. It is sectional drawing which shows the structure of the shaft apparatus of the rotation lock apparatus of 13th Example of this invention. It is sectional drawing which shows the structure at the time of the lock of the rotation locking device of 13th Example of this invention at the time of lock release.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Truck loading platform 11 Side wall of loading platform 12 Rotation lock device 13, 14 Rear door

Claims (8)

A shaft member;
One fixing member that is perpendicular to the shaft member and includes a support plate provided with a locking hole, and supports the shaft member so as to be slidable in the axial direction by a predetermined range;
Is fixed to the other of the fixing member, a vertical and said shaft member, comprising a reinforcing plate with a hole for the lock is provided, a cylindrical member rotatably supported in engagement with said shaft member,
In conjunction with the shaft member, and Lupi down is inserted into the hole if the hole and the position of the reinforcing plate of holes of the support plate matches,
A rotation lock device comprising spring means for urging the shaft member in a direction in which the pin is inserted into the hole.   The shaft member has a first predetermined range whose diameter is larger than that of the second predetermined range, and the spring means is a coil spring disposed outside the second predetermined range of the shaft member. The rotation lock device according to claim 1, wherein the rotation lock device is provided. The cylindrical member, the rotary locking device according to claim 2, wherein the kite with one end abutting against the step portion of the spring means.   The rotation lock device according to claim 1, wherein the other fixing member is connected to a mounting plate with a predetermined play, and the mounting plate is fixed to the door. Rotation lock device according to claim 1, characterized in that it comprises an unlocking means for pressing the front Kijiku member.   6. The rotation lock device according to claim 5, wherein the unlocking means is either a rotatable lever or an electric actuator controlled by a switch.   The locking hole provided in the reinforcing plate has a conical inclined side surface, and the head of the pin has a hemispherical shape or a curved surface shape similar to a hemispherical shape. The rotation lock device according to 1.   The rotation lock device according to claim 1, wherein the support plate and the reinforcing plate are further provided with holes for manually inserting pins.

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